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/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/heapShared.inline.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/oopFactory.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/instanceMirrorKlass.hpp"
47 #include "oops/klass.hpp"
48 #include "oops/method.inline.hpp"
49 #include "oops/objArrayOop.inline.hpp"
50 #include "oops/oop.inline.hpp"
51 #include "oops/symbol.hpp"
52 #include "oops/typeArrayOop.inline.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/resolvedMethodTable.hpp"
55 #include "runtime/fieldDescriptor.inline.hpp"
56 #include "runtime/frame.inline.hpp"
57 #include "runtime/handles.inline.hpp"
58 #include "runtime/interfaceSupport.inline.hpp"
59 #include "runtime/java.hpp"
60 #include "runtime/javaCalls.hpp"
61 #include "runtime/jniHandles.inline.hpp"
62 #include "runtime/safepoint.hpp"
63 #include "runtime/safepointVerifiers.hpp"
64 #include "runtime/thread.inline.hpp"
65 #include "runtime/vframe.inline.hpp"
66 #include "utilities/align.hpp"
67 #include "utilities/preserveException.hpp"
68 #if INCLUDE_JVMCI
69 #include "jvmci/jvmciJavaClasses.hpp"
70 #endif
71
72 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
73 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
74
75 #if INCLUDE_CDS
76 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
77 f->do_u4((u4*)&_##name##_offset);
78 #endif
79
80 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
81 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
82
83 InjectedField JavaClasses::_injected_fields[] = {
84 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
85 };
86
87 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
88 return _injected_fields[id].compute_offset();
89 }
90
91 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
92 *field_count = 0;
93
94 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
95 if (sid == vmSymbols::NO_SID) {
96 // Only well known classes can inject fields
97 return NULL;
98 }
99
100 int count = 0;
101 int start = -1;
102
103 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
104 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
105 count++; \
106 if (start == -1) start = klass##_##name##_enum; \
107 }
108 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
109 #undef LOOKUP_INJECTED_FIELD
110
111 if (start != -1) {
112 *field_count = count;
113 return _injected_fields + start;
114 }
115 return NULL;
116 }
117
118
119 // Helpful routine for computing field offsets at run time rather than hardcoding them
120 // Finds local fields only, including static fields. Static field offsets are from the
121 // beginning of the mirror.
122 static void compute_offset(int &dest_offset,
123 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
124 bool is_static = false) {
125 fieldDescriptor fd;
126 if (ik == NULL) {
127 ResourceMark rm;
128 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
129 vm_exit_during_initialization("Invalid layout of well-known class");
130 }
131
132 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
133 ResourceMark rm;
134 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
135 name_symbol->as_C_string(), signature_symbol->as_C_string());
136 #ifndef PRODUCT
137 // Prints all fields and offsets
138 Log(class) lt;
139 LogStream ls(lt.error());
140 ik->print_on(&ls);
141 #endif //PRODUCT
142 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
143 }
144 dest_offset = fd.offset();
145 }
146
147 // Overloading to pass name as a string.
148 static void compute_offset(int& dest_offset, InstanceKlass* ik,
149 const char* name_string, Symbol* signature_symbol,
150 bool is_static = false) {
151 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
152 if (name == NULL) {
153 ResourceMark rm;
154 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
155 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
156 }
157 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
158 }
159
160 int java_lang_String::value_offset = 0;
161 int java_lang_String::hash_offset = 0;
162 int java_lang_String::coder_offset = 0;
163
164 bool java_lang_String::initialized = false;
165
166 bool java_lang_String::is_instance(oop obj) {
167 return is_instance_inlined(obj);
168 }
169
170 #if INCLUDE_CDS
171 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
172 f->do_u4((u4*)&offset)
173 #endif
174
175 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
176 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
177
178 #define STRING_FIELDS_DO(macro) \
179 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
180 macro(hash_offset, k, "hash", int_signature, false); \
181 macro(coder_offset, k, "coder", byte_signature, false)
182
183 void java_lang_String::compute_offsets() {
184 if (initialized) {
185 return;
186 }
187
188 InstanceKlass* k = SystemDictionary::String_klass();
189 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
190
191 initialized = true;
192 }
193
194 #if INCLUDE_CDS
195 void java_lang_String::serialize_offsets(SerializeClosure* f) {
196 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
197 f->do_u4((u4*)&initialized);
198 }
199 #endif
200
201 class CompactStringsFixup : public FieldClosure {
202 private:
203 bool _value;
204
205 public:
206 CompactStringsFixup(bool value) : _value(value) {}
207
208 void do_field(fieldDescriptor* fd) {
209 if (fd->name() == vmSymbols::compact_strings_name()) {
210 oop mirror = fd->field_holder()->java_mirror();
211 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
212 assert(mirror != NULL, "String must have mirror already");
213 mirror->bool_field_put(fd->offset(), _value);
214 }
215 }
216 };
217
218 void java_lang_String::set_compact_strings(bool value) {
219 CompactStringsFixup fix(value);
220 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
221 }
222
223 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
224 assert(initialized, "Must be initialized");
225 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
226
227 // Create the String object first, so there's a chance that the String
228 // and the char array it points to end up in the same cache line.
229 oop obj;
230 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
231
232 // Create the char array. The String object must be handlized here
233 // because GC can happen as a result of the allocation attempt.
234 Handle h_obj(THREAD, obj);
235 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
236 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
237
238 // Point the String at the char array
239 obj = h_obj();
240 set_value(obj, buffer);
241 // No need to zero the offset, allocation zero'ed the entire String object
242 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
243 return h_obj;
244 }
245
246 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
247 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
248 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
249 typeArrayOop buffer = value(h_obj());
250 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
251 if (is_latin1) {
252 for (int index = 0; index < length; index++) {
253 buffer->byte_at_put(index, (jbyte)unicode[index]);
254 }
255 } else {
256 for (int index = 0; index < length; index++) {
257 buffer->char_at_put(index, unicode[index]);
258 }
259 }
260
261 #ifdef ASSERT
262 {
263 ResourceMark rm;
264 char* expected = UNICODE::as_utf8(unicode, length);
265 char* actual = as_utf8_string(h_obj());
266 if (strcmp(expected, actual) != 0) {
267 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
268 ShouldNotReachHere();
269 }
270 }
271 #endif
272
273 return h_obj;
274 }
275
276 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
277 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
278 return h_obj();
279 }
280
281 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
282 if (utf8_str == NULL) {
283 return Handle();
284 }
285 bool has_multibyte, is_latin1;
286 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
287 if (!CompactStrings) {
288 has_multibyte = true;
289 is_latin1 = false;
290 }
291
292 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
293 if (length > 0) {
294 if (!has_multibyte) {
295 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
296 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
297 } else if (is_latin1) {
298 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
299 } else {
300 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
301 }
302 }
303
304 #ifdef ASSERT
305 // This check is too strict because the input string is not necessarily valid UTF8.
306 // For example, it may be created with arbitrary content via jni_NewStringUTF.
307 /*
308 {
309 ResourceMark rm;
310 const char* expected = utf8_str;
311 char* actual = as_utf8_string(h_obj());
312 if (strcmp(expected, actual) != 0) {
313 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
314 ShouldNotReachHere();
315 }
316 }
317 */
318 #endif
319
320 return h_obj;
321 }
322
323 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
324 Handle h_obj = create_from_str(utf8_str, CHECK_0);
325 return h_obj();
326 }
327
328 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
329 const char* utf8_str = (char*)symbol->bytes();
330 int utf8_len = symbol->utf8_length();
331
332 bool has_multibyte, is_latin1;
333 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
334 if (!CompactStrings) {
335 has_multibyte = true;
336 is_latin1 = false;
337 }
338
339 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
340 if (length > 0) {
341 if (!has_multibyte) {
342 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
343 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
344 } else if (is_latin1) {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
346 } else {
347 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
348 }
349 }
350
351 #ifdef ASSERT
352 {
353 ResourceMark rm;
354 const char* expected = symbol->as_utf8();
355 char* actual = as_utf8_string(h_obj());
356 if (strncmp(expected, actual, utf8_len) != 0) {
357 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
358 ShouldNotReachHere();
359 }
360 }
361 #endif
362
363 return h_obj;
364 }
365
366 // Converts a C string to a Java String based on current encoding
367 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
368 assert(str != NULL, "bad arguments");
369
370 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
371 static to_java_string_fn_t _to_java_string_fn = NULL;
372
373 if (_to_java_string_fn == NULL) {
374 void *lib_handle = os::native_java_library();
375 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
376 if (_to_java_string_fn == NULL) {
377 fatal("NewStringPlatform missing");
378 }
379 }
380
381 jstring js = NULL;
382 { JavaThread* thread = (JavaThread*)THREAD;
383 assert(thread->is_Java_thread(), "must be java thread");
384 HandleMark hm(thread);
385 ThreadToNativeFromVM ttn(thread);
386 js = (_to_java_string_fn)(thread->jni_environment(), str);
387 }
388 return Handle(THREAD, JNIHandles::resolve(js));
389 }
390
391 // Converts a Java String to a native C string that can be used for
392 // native OS calls.
393 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
394 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
395 static to_platform_string_fn_t _to_platform_string_fn = NULL;
396
397 if (_to_platform_string_fn == NULL) {
398 void *lib_handle = os::native_java_library();
399 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
400 if (_to_platform_string_fn == NULL) {
401 fatal("GetStringPlatformChars missing");
402 }
403 }
404
405 char *native_platform_string;
406 { JavaThread* thread = (JavaThread*)THREAD;
407 assert(thread->is_Java_thread(), "must be java thread");
408 JNIEnv *env = thread->jni_environment();
409 jstring js = (jstring) JNIHandles::make_local(env, java_string());
410 bool is_copy;
411 HandleMark hm(thread);
412 ThreadToNativeFromVM ttn(thread);
413 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
414 assert(is_copy == JNI_TRUE, "is_copy value changed");
415 JNIHandles::destroy_local(js);
416 }
417 return native_platform_string;
418 }
419
420 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
421 oop obj = java_string();
422 // Typical usage is to convert all '/' to '.' in string.
423 typeArrayOop value = java_lang_String::value(obj);
424 int length = java_lang_String::length(obj);
425 bool is_latin1 = java_lang_String::is_latin1(obj);
426
427 // First check if any from_char exist
428 int index; // Declared outside, used later
429 for (index = 0; index < length; index++) {
430 jchar c = !is_latin1 ? value->char_at(index) :
431 ((jchar) value->byte_at(index)) & 0xff;
432 if (c == from_char) {
433 break;
434 }
435 }
436 if (index == length) {
437 // No from_char, so do not copy.
438 return java_string;
439 }
440
441 // Check if result string will be latin1
442 bool to_is_latin1 = false;
443
444 // Replacement char must be latin1
445 if (CompactStrings && UNICODE::is_latin1(to_char)) {
446 if (is_latin1) {
447 // Source string is latin1 as well
448 to_is_latin1 = true;
449 } else if (!UNICODE::is_latin1(from_char)) {
450 // We are replacing an UTF16 char. Scan string to
451 // check if result can be latin1 encoded.
452 to_is_latin1 = true;
453 for (index = 0; index < length; index++) {
454 jchar c = value->char_at(index);
455 if (c != from_char && !UNICODE::is_latin1(c)) {
456 to_is_latin1 = false;
457 break;
458 }
459 }
460 }
461 }
462
463 // Create new UNICODE (or byte) buffer. Must handlize value because GC
464 // may happen during String and char array creation.
465 typeArrayHandle h_value(THREAD, value);
466 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
467 typeArrayOop from_buffer = h_value();
468 typeArrayOop to_buffer = java_lang_String::value(string());
469
470 // Copy contents
471 for (index = 0; index < length; index++) {
472 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
473 ((jchar) from_buffer->byte_at(index)) & 0xff;
474 if (c == from_char) {
475 c = to_char;
476 }
477 if (!to_is_latin1) {
478 to_buffer->char_at_put(index, c);
479 } else {
480 to_buffer->byte_at_put(index, (jbyte) c);
481 }
482 }
483 return string;
484 }
485
486 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
487 typeArrayOop value = java_lang_String::value(java_string);
488 length = java_lang_String::length(java_string);
489 bool is_latin1 = java_lang_String::is_latin1(java_string);
490
491 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
492 if (result != NULL) {
493 if (!is_latin1) {
494 for (int index = 0; index < length; index++) {
495 result[index] = value->char_at(index);
496 }
497 } else {
498 for (int index = 0; index < length; index++) {
499 result[index] = ((jchar) value->byte_at(index)) & 0xff;
500 }
501 }
502 } else {
503 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
504 }
505 return result;
506 }
507
508 unsigned int java_lang_String::hash_code(oop java_string) {
509 int length = java_lang_String::length(java_string);
510 // Zero length string will hash to zero with String.hashCode() function.
511 if (length == 0) return 0;
512
513 typeArrayOop value = java_lang_String::value(java_string);
514 bool is_latin1 = java_lang_String::is_latin1(java_string);
515
516 if (is_latin1) {
517 return java_lang_String::hash_code(value->byte_at_addr(0), length);
518 } else {
519 return java_lang_String::hash_code(value->char_at_addr(0), length);
520 }
521 }
522
523 char* java_lang_String::as_quoted_ascii(oop java_string) {
524 typeArrayOop value = java_lang_String::value(java_string);
525 int length = java_lang_String::length(java_string);
526 bool is_latin1 = java_lang_String::is_latin1(java_string);
527
528 if (length == 0) return NULL;
529
530 char* result;
531 int result_length;
532 if (!is_latin1) {
533 jchar* base = value->char_at_addr(0);
534 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
535 result = NEW_RESOURCE_ARRAY(char, result_length);
536 UNICODE::as_quoted_ascii(base, length, result, result_length);
537 } else {
538 jbyte* base = value->byte_at_addr(0);
539 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
540 result = NEW_RESOURCE_ARRAY(char, result_length);
541 UNICODE::as_quoted_ascii(base, length, result, result_length);
542 }
543 assert(result_length >= length + 1, "must not be shorter");
544 assert(result_length == (int)strlen(result) + 1, "must match");
545 return result;
546 }
547
548 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552 if (!is_latin1) {
553 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
554 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
555 return sym;
556 } else {
557 ResourceMark rm;
558 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
559 const char* base = UNICODE::as_utf8(position, length);
560 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
561 return sym;
562 }
563 }
564
565 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
566 typeArrayOop value = java_lang_String::value(java_string);
567 int length = java_lang_String::length(java_string);
568 bool is_latin1 = java_lang_String::is_latin1(java_string);
569 if (!is_latin1) {
570 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
571 return SymbolTable::probe_unicode(base, length);
572 } else {
573 ResourceMark rm;
574 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
575 const char* base = UNICODE::as_utf8(position, length);
576 return SymbolTable::probe(base, length);
577 }
578 }
579
580 int java_lang_String::utf8_length(oop java_string) {
581 typeArrayOop value = java_lang_String::value(java_string);
582 int length = java_lang_String::length(java_string);
583 bool is_latin1 = java_lang_String::is_latin1(java_string);
584 if (length == 0) {
585 return 0;
586 }
587 if (!is_latin1) {
588 return UNICODE::utf8_length(value->char_at_addr(0), length);
589 } else {
590 return UNICODE::utf8_length(value->byte_at_addr(0), length);
591 }
592 }
593
594 char* java_lang_String::as_utf8_string(oop java_string) {
595 typeArrayOop value = java_lang_String::value(java_string);
596 int length = java_lang_String::length(java_string);
597 bool is_latin1 = java_lang_String::is_latin1(java_string);
598 if (!is_latin1) {
599 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
600 return UNICODE::as_utf8(position, length);
601 } else {
602 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
603 return UNICODE::as_utf8(position, length);
604 }
605 }
606
607 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
608 typeArrayOop value = java_lang_String::value(java_string);
609 int length = java_lang_String::length(java_string);
610 bool is_latin1 = java_lang_String::is_latin1(java_string);
611 if (!is_latin1) {
612 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
613 return UNICODE::as_utf8(position, length, buf, buflen);
614 } else {
615 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
616 return UNICODE::as_utf8(position, length, buf, buflen);
617 }
618 }
619
620 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
621 typeArrayOop value = java_lang_String::value(java_string);
622 int length = java_lang_String::length(java_string);
623 assert(start + len <= length, "just checking");
624 bool is_latin1 = java_lang_String::is_latin1(java_string);
625 if (!is_latin1) {
626 jchar* position = value->char_at_addr(start);
627 return UNICODE::as_utf8(position, len);
628 } else {
629 jbyte* position = value->byte_at_addr(start);
630 return UNICODE::as_utf8(position, len);
631 }
632 }
633
634 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
635 typeArrayOop value = java_lang_String::value(java_string);
636 int length = java_lang_String::length(java_string);
637 assert(start + len <= length, "just checking");
638 bool is_latin1 = java_lang_String::is_latin1(java_string);
639 if (!is_latin1) {
640 jchar* position = value->char_at_addr(start);
641 return UNICODE::as_utf8(position, len, buf, buflen);
642 } else {
643 jbyte* position = value->byte_at_addr(start);
644 return UNICODE::as_utf8(position, len, buf, buflen);
645 }
646 }
647
648 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
649 assert(java_string->klass() == SystemDictionary::String_klass(),
650 "must be java_string");
651 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
652 int length = java_lang_String::length(java_string);
653 if (length != len) {
654 return false;
655 }
656 bool is_latin1 = java_lang_String::is_latin1(java_string);
657 if (!is_latin1) {
658 for (int i = 0; i < len; i++) {
659 if (value->char_at(i) != chars[i]) {
660 return false;
661 }
662 }
663 } else {
664 for (int i = 0; i < len; i++) {
665 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
666 return false;
667 }
668 }
669 }
670 return true;
671 }
672
673 bool java_lang_String::equals(oop str1, oop str2) {
674 assert(str1->klass() == SystemDictionary::String_klass(),
675 "must be java String");
676 assert(str2->klass() == SystemDictionary::String_klass(),
677 "must be java String");
678 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
679 int length1 = java_lang_String::length(str1);
680 bool is_latin1 = java_lang_String::is_latin1(str1);
681 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
682 int length2 = java_lang_String::length(str2);
683 bool is_latin2 = java_lang_String::is_latin1(str2);
684
685 if ((length1 != length2) || (is_latin1 != is_latin2)) {
686 // Strings of different size or with different
687 // coders are never equal.
688 return false;
689 }
690 int blength1 = value1->length();
691 for (int i = 0; i < blength1; i++) {
692 if (value1->byte_at(i) != value2->byte_at(i)) {
693 return false;
694 }
695 }
696 return true;
697 }
698
699 void java_lang_String::print(oop java_string, outputStream* st) {
700 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
701 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
702
703 if (value == NULL) {
704 // This can happen if, e.g., printing a String
705 // object before its initializer has been called
706 st->print("NULL");
707 return;
708 }
709
710 int length = java_lang_String::length(java_string);
711 bool is_latin1 = java_lang_String::is_latin1(java_string);
712
713 st->print("\"");
714 for (int index = 0; index < length; index++) {
715 st->print("%c", (!is_latin1) ? value->char_at(index) :
716 ((jchar) value->byte_at(index)) & 0xff );
717 }
718 st->print("\"");
719 }
720
721
722 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
723 assert(mirror.not_null() && fd->is_static(), "just checking");
724 if (fd->has_initial_value()) {
725 BasicType t = fd->field_type();
726 switch (t) {
727 case T_BYTE:
728 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
729 break;
730 case T_BOOLEAN:
731 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
732 break;
733 case T_CHAR:
734 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
735 break;
736 case T_SHORT:
737 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
738 break;
739 case T_INT:
740 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
741 break;
742 case T_FLOAT:
743 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
744 break;
745 case T_DOUBLE:
746 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
747 break;
748 case T_LONG:
749 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
750 break;
751 case T_OBJECT:
752 {
753 assert(fd->signature() == vmSymbols::string_signature(),
754 "just checking");
755 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
756 // Archive the String field and update the pointer.
757 oop s = mirror()->obj_field(fd->offset());
758 oop archived_s = StringTable::create_archived_string(s, CHECK);
759 mirror()->obj_field_put(fd->offset(), archived_s);
760 } else {
761 oop string = fd->string_initial_value(CHECK);
762 mirror()->obj_field_put(fd->offset(), string);
763 }
764 }
765 break;
766 default:
767 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
768 "Illegal ConstantValue attribute in class file");
769 }
770 }
771 }
772
773
774 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
775 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
776
777 // If the offset was read from the shared archive, it was fixed up already
778 if (!k->is_shared()) {
779 if (k->is_instance_klass()) {
780 // During bootstrap, java.lang.Class wasn't loaded so static field
781 // offsets were computed without the size added it. Go back and
782 // update all the static field offsets to included the size.
783 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
784 if (fs.access_flags().is_static()) {
785 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
786 fs.set_offset(real_offset);
787 }
788 }
789 }
790 }
791
792 if (k->is_shared() && k->has_raw_archived_mirror()) {
793 if (HeapShared::open_archive_heap_region_mapped()) {
794 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
795 assert(present, "Missing archived mirror for %s", k->external_name());
796 return;
797 } else {
798 k->set_java_mirror_handle(NULL);
799 k->clear_has_raw_archived_mirror();
800 }
801 }
802 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
803 }
804
805 void java_lang_Class::initialize_mirror_fields(Klass* k,
806 Handle mirror,
807 Handle protection_domain,
808 TRAPS) {
809 // Allocate a simple java object for a lock.
810 // This needs to be a java object because during class initialization
811 // it can be held across a java call.
812 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
813 set_init_lock(mirror(), r);
814
815 // Set protection domain also
816 set_protection_domain(mirror(), protection_domain());
817
818 // Initialize static fields
819 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
820 }
821
822 // Set the java.lang.Module module field in the java_lang_Class mirror
823 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
824 if (module.is_null()) {
825 // During startup, the module may be NULL only if java.base has not been defined yet.
826 // Put the class on the fixup_module_list to patch later when the java.lang.Module
827 // for java.base is known.
828 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
829
830 bool javabase_was_defined = false;
831 {
832 MutexLocker m1(Module_lock, THREAD);
833 // Keep list of classes needing java.base module fixup
834 if (!ModuleEntryTable::javabase_defined()) {
835 assert(k->java_mirror() != NULL, "Class's mirror is null");
836 k->class_loader_data()->inc_keep_alive();
837 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
838 fixup_module_field_list()->push(k);
839 } else {
840 javabase_was_defined = true;
841 }
842 }
843
844 // If java.base was already defined then patch this particular class with java.base.
845 if (javabase_was_defined) {
846 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
847 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
848 "Setting class module field, " JAVA_BASE_NAME " should be defined");
849 Handle javabase_handle(THREAD, javabase_entry->module());
850 set_module(mirror(), javabase_handle());
851 }
852 } else {
853 assert(Universe::is_module_initialized() ||
854 (ModuleEntryTable::javabase_defined() &&
855 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
856 "Incorrect java.lang.Module specification while creating mirror");
857 set_module(mirror(), module());
858 }
859 }
860
861 // Statically allocate fixup lists because they always get created.
862 void java_lang_Class::allocate_fixup_lists() {
863 GrowableArray<Klass*>* mirror_list =
864 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
865 set_fixup_mirror_list(mirror_list);
866
867 GrowableArray<Klass*>* module_list =
868 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
869 set_fixup_module_field_list(module_list);
870 }
871
872 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
873 Handle module, Handle protection_domain, TRAPS) {
874 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
875 assert(k->java_mirror() == NULL, "should only assign mirror once");
876
877 // Use this moment of initialization to cache modifier_flags also,
878 // to support Class.getModifiers(). Instance classes recalculate
879 // the cached flags after the class file is parsed, but before the
880 // class is put into the system dictionary.
881 int computed_modifiers = k->compute_modifier_flags(CHECK);
882 k->set_modifier_flags(computed_modifiers);
883 // Class_klass has to be loaded because it is used to allocate
884 // the mirror.
885 if (SystemDictionary::Class_klass_loaded()) {
886 // Allocate mirror (java.lang.Class instance)
887 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
888 Handle mirror(THREAD, mirror_oop);
889 Handle comp_mirror;
890
891 // Setup indirection from mirror->klass
892 java_lang_Class::set_klass(mirror(), k);
893
894 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
895 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
896
897 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
898
899 // It might also have a component mirror. This mirror must already exist.
900 if (k->is_array_klass()) {
901 if (k->is_typeArray_klass()) {
902 BasicType type = TypeArrayKlass::cast(k)->element_type();
903 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
904 } else {
905 assert(k->is_objArray_klass(), "Must be");
906 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
907 assert(element_klass != NULL, "Must have an element klass");
908 comp_mirror = Handle(THREAD, element_klass->java_mirror());
909 }
910 assert(comp_mirror() != NULL, "must have a mirror");
911
912 // Two-way link between the array klass and its component mirror:
913 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
914 set_component_mirror(mirror(), comp_mirror());
915 // See below for ordering dependencies between field array_klass in component mirror
916 // and java_mirror in this klass.
917 } else {
918 assert(k->is_instance_klass(), "Must be");
919
920 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
921 if (HAS_PENDING_EXCEPTION) {
922 // If any of the fields throws an exception like OOM remove the klass field
923 // from the mirror so GC doesn't follow it after the klass has been deallocated.
924 // This mirror looks like a primitive type, which logically it is because it
925 // it represents no class.
926 java_lang_Class::set_klass(mirror(), NULL);
927 return;
928 }
929 }
930
931 // set the classLoader field in the java_lang_Class instance
932 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
933 set_class_loader(mirror(), class_loader());
934
935 // Setup indirection from klass->mirror
936 // after any exceptions can happen during allocations.
937 k->set_java_mirror(mirror);
938
939 // Set the module field in the java_lang_Class instance. This must be done
940 // after the mirror is set.
941 set_mirror_module_field(k, mirror, module, THREAD);
942
943 if (comp_mirror() != NULL) {
944 // Set after k->java_mirror() is published, because compiled code running
945 // concurrently doesn't expect a k to have a null java_mirror.
946 release_set_array_klass(comp_mirror(), k);
947 }
948 } else {
949 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
950 fixup_mirror_list()->push(k);
951 }
952 }
953
954 #if INCLUDE_CDS_JAVA_HEAP
955 // Clears mirror fields. Static final fields with initial values are reloaded
956 // from constant pool. The object identity hash is in the object header and is
957 // not affected.
958 class ResetMirrorField: public FieldClosure {
959 private:
960 Handle _m;
961
962 public:
963 ResetMirrorField(Handle mirror) : _m(mirror) {}
964
965 void do_field(fieldDescriptor* fd) {
966 assert(DumpSharedSpaces, "dump time only");
967 assert(_m.not_null(), "Mirror cannot be NULL");
968
969 if (fd->is_static() && fd->has_initial_value()) {
970 initialize_static_field(fd, _m, Thread::current());
971 return;
972 }
973
974 BasicType ft = fd->field_type();
975 switch (ft) {
976 case T_BYTE:
977 _m()->byte_field_put(fd->offset(), 0);
978 break;
979 case T_CHAR:
980 _m()->char_field_put(fd->offset(), 0);
981 break;
982 case T_DOUBLE:
983 _m()->double_field_put(fd->offset(), 0);
984 break;
985 case T_FLOAT:
986 _m()->float_field_put(fd->offset(), 0);
987 break;
988 case T_INT:
989 _m()->int_field_put(fd->offset(), 0);
990 break;
991 case T_LONG:
992 _m()->long_field_put(fd->offset(), 0);
993 break;
994 case T_SHORT:
995 _m()->short_field_put(fd->offset(), 0);
996 break;
997 case T_BOOLEAN:
998 _m()->bool_field_put(fd->offset(), false);
999 break;
1000 case T_ARRAY:
1001 case T_OBJECT: {
1002 // It might be useful to cache the String field, but
1003 // for now just clear out any reference field
1004 oop o = _m()->obj_field(fd->offset());
1005 _m()->obj_field_put(fd->offset(), NULL);
1006 break;
1007 }
1008 default:
1009 ShouldNotReachHere();
1010 break;
1011 }
1012 }
1013 };
1014
1015 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1016 assert(HeapShared::is_heap_object_archiving_allowed(),
1017 "HeapShared::is_heap_object_archiving_allowed() must be true");
1018
1019 for (int t = 0; t <= T_VOID; t++) {
1020 oop m = Universe::_mirrors[t];
1021 if (m != NULL) {
1022 // Update the field at _array_klass_offset to point to the relocated array klass.
1023 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1024 assert(archived_m != NULL, "sanity");
1025 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1026 assert(ak != NULL || t == T_VOID, "should not be NULL");
1027 if (ak != NULL) {
1028 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1029 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1030 }
1031
1032 // Clear the fields. Just to be safe
1033 Klass *k = m->klass();
1034 Handle archived_mirror_h(THREAD, archived_m);
1035 ResetMirrorField reset(archived_mirror_h);
1036 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1037
1038 log_trace(cds, heap, mirror)(
1039 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1040 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1041
1042 Universe::_mirrors[t] = archived_m;
1043 }
1044 }
1045
1046 assert(Universe::_mirrors[T_INT] != NULL &&
1047 Universe::_mirrors[T_FLOAT] != NULL &&
1048 Universe::_mirrors[T_DOUBLE] != NULL &&
1049 Universe::_mirrors[T_BYTE] != NULL &&
1050 Universe::_mirrors[T_BOOLEAN] != NULL &&
1051 Universe::_mirrors[T_CHAR] != NULL &&
1052 Universe::_mirrors[T_LONG] != NULL &&
1053 Universe::_mirrors[T_SHORT] != NULL &&
1054 Universe::_mirrors[T_VOID] != NULL, "sanity");
1055
1056 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1057 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1058 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1059 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1060 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1061 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1062 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1063 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1064 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1065 }
1066
1067 //
1068 // After the mirror object is successfully archived, the archived
1069 // klass is set with _has_archived_raw_mirror flag.
1070 //
1071 // The _has_archived_raw_mirror flag is cleared at runtime when the
1072 // archived mirror is restored. If archived java heap data cannot
1073 // be used at runtime, new mirror object is created for the shared
1074 // class. The _has_archived_raw_mirror is cleared also during the process.
1075 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1076 assert(HeapShared::is_heap_object_archiving_allowed(),
1077 "HeapShared::is_heap_object_archiving_allowed() must be true");
1078
1079 // Mirror is already archived
1080 if (k->has_raw_archived_mirror()) {
1081 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1082 return k->archived_java_mirror_raw();
1083 }
1084
1085 // No mirror
1086 oop mirror = k->java_mirror();
1087 if (mirror == NULL) {
1088 return NULL;
1089 }
1090
1091 if (k->is_instance_klass()) {
1092 InstanceKlass *ik = InstanceKlass::cast(k);
1093 assert(ik->signers() == NULL, "class with signer should have been excluded");
1094
1095 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1096 ik->is_shared_app_class())) {
1097 // Archiving mirror for classes from non-builtin loaders is not
1098 // supported. Clear the _java_mirror within the archived class.
1099 k->set_java_mirror_handle(NULL);
1100 return NULL;
1101 }
1102 }
1103
1104 // Now start archiving the mirror object
1105 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1106 if (archived_mirror == NULL) {
1107 return NULL;
1108 }
1109
1110 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1111 if (archived_mirror == NULL) {
1112 return NULL;
1113 }
1114
1115 k->set_archived_java_mirror_raw(archived_mirror);
1116
1117 k->set_has_raw_archived_mirror();
1118
1119 ResourceMark rm;
1120 log_trace(cds, heap, mirror)(
1121 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1122 k->external_name(), p2i(mirror), p2i(archived_mirror));
1123
1124 return archived_mirror;
1125 }
1126
1127 // The process is based on create_mirror().
1128 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1129 oop archived_mirror,
1130 Thread *THREAD) {
1131 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1132 // to archived metadata and objects below.
1133 Klass *c = archived_mirror->klass();
1134 Handle archived_mirror_h(THREAD, archived_mirror);
1135 ResetMirrorField reset(archived_mirror_h);
1136 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1137
1138 if (k->is_array_klass()) {
1139 oop archived_comp_mirror;
1140 if (k->is_typeArray_klass()) {
1141 // The primitive type mirrors are already archived. Get the archived mirror.
1142 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1143 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1144 assert(archived_comp_mirror != NULL, "Must be");
1145 } else {
1146 assert(k->is_objArray_klass(), "Must be");
1147 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1148 assert(element_klass != NULL, "Must have an element klass");
1149 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1150 if (archived_comp_mirror == NULL) {
1151 return NULL;
1152 }
1153 }
1154 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1155 } else {
1156 assert(k->is_instance_klass(), "Must be");
1157
1158 // Reset local static fields in the mirror
1159 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1160
1161 java_lang_Class:set_init_lock(archived_mirror, NULL);
1162
1163 set_protection_domain(archived_mirror, NULL);
1164 }
1165
1166 // clear class loader and mirror_module_field
1167 set_class_loader(archived_mirror, NULL);
1168 set_module(archived_mirror, NULL);
1169
1170 // The archived mirror's field at _klass_offset is still pointing to the original
1171 // klass. Updated the field in the archived mirror to point to the relocated
1172 // klass in the archive.
1173 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1174 log_debug(cds, heap, mirror)(
1175 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1176 p2i(as_Klass(mirror)), p2i(reloc_k));
1177 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1178
1179 // The field at _array_klass_offset is pointing to the original one dimension
1180 // higher array klass if exists. Relocate the pointer.
1181 Klass *arr = array_klass_acquire(mirror);
1182 if (arr != NULL) {
1183 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1184 log_debug(cds, heap, mirror)(
1185 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1186 p2i(arr), p2i(reloc_arr));
1187 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1188 }
1189 return archived_mirror;
1190 }
1191
1192 // Returns true if the mirror is updated, false if no archived mirror
1193 // data is present. After the archived mirror object is restored, the
1194 // shared klass' _has_raw_archived_mirror flag is cleared.
1195 bool java_lang_Class::restore_archived_mirror(Klass *k,
1196 Handle class_loader, Handle module,
1197 Handle protection_domain, TRAPS) {
1198 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1199 // see more details in SystemDictionary::resolve_well_known_classes().
1200 if (!SystemDictionary::Class_klass_loaded()) {
1201 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1202 fixup_mirror_list()->push(k);
1203 return true;
1204 }
1205
1206 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1207
1208 if (m == NULL) {
1209 return false;
1210 }
1211
1212 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1213
1214 // mirror is archived, restore
1215 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1216 Handle mirror(THREAD, m);
1217
1218 if (!k->is_array_klass()) {
1219 // - local static final fields with initial values were initialized at dump time
1220
1221 // create the init_lock
1222 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1223 set_init_lock(mirror(), r);
1224
1225 if (protection_domain.not_null()) {
1226 set_protection_domain(mirror(), protection_domain());
1227 }
1228 }
1229
1230 assert(class_loader() == k->class_loader(), "should be same");
1231 if (class_loader.not_null()) {
1232 set_class_loader(mirror(), class_loader());
1233 }
1234
1235 k->set_java_mirror(mirror);
1236 k->clear_has_raw_archived_mirror();
1237
1238 set_mirror_module_field(k, mirror, module, THREAD);
1239
1240 ResourceMark rm;
1241 log_trace(cds, heap, mirror)(
1242 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1243
1244 return true;
1245 }
1246 #endif // INCLUDE_CDS_JAVA_HEAP
1247
1248 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1249 assert(_module_offset != 0, "must have been computed already");
1250 java_lang_Class::set_module(k->java_mirror(), module());
1251 }
1252
1253 int java_lang_Class::oop_size(oop java_class) {
1254 assert(_oop_size_offset != 0, "must be set");
1255 int size = java_class->int_field(_oop_size_offset);
1256 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1257 return size;
1258 }
1259
1260 int java_lang_Class::oop_size_raw(oop java_class) {
1261 assert(_oop_size_offset != 0, "must be set");
1262 int size = java_class->int_field_raw(_oop_size_offset);
1263 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1264 return size;
1265 }
1266
1267 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1268 assert(_oop_size_offset != 0, "must be set");
1269 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1270 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1271 }
1272
1273 int java_lang_Class::static_oop_field_count(oop java_class) {
1274 assert(_static_oop_field_count_offset != 0, "must be set");
1275 return java_class->int_field(_static_oop_field_count_offset);
1276 }
1277
1278 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1279 assert(_static_oop_field_count_offset != 0, "must be set");
1280 return java_class->int_field_raw(_static_oop_field_count_offset);
1281 }
1282
1283 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1284 assert(_static_oop_field_count_offset != 0, "must be set");
1285 java_class->int_field_put(_static_oop_field_count_offset, size);
1286 }
1287
1288 oop java_lang_Class::protection_domain(oop java_class) {
1289 assert(_protection_domain_offset != 0, "must be set");
1290 return java_class->obj_field(_protection_domain_offset);
1291 }
1292 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1293 assert(_protection_domain_offset != 0, "must be set");
1294 java_class->obj_field_put(_protection_domain_offset, pd);
1295 }
1296
1297 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1298 assert(_component_mirror_offset != 0, "must be set");
1299 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1300 }
1301 oop java_lang_Class::component_mirror(oop java_class) {
1302 assert(_component_mirror_offset != 0, "must be set");
1303 return java_class->obj_field(_component_mirror_offset);
1304 }
1305
1306 oop java_lang_Class::init_lock(oop java_class) {
1307 assert(_init_lock_offset != 0, "must be set");
1308 return java_class->obj_field(_init_lock_offset);
1309 }
1310 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1311 assert(_init_lock_offset != 0, "must be set");
1312 java_class->obj_field_put(_init_lock_offset, init_lock);
1313 }
1314
1315 objArrayOop java_lang_Class::signers(oop java_class) {
1316 assert(_signers_offset != 0, "must be set");
1317 return (objArrayOop)java_class->obj_field(_signers_offset);
1318 }
1319 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1320 assert(_signers_offset != 0, "must be set");
1321 java_class->obj_field_put(_signers_offset, (oop)signers);
1322 }
1323
1324
1325 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1326 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1327 if (_class_loader_offset != 0) {
1328 java_class->obj_field_put(_class_loader_offset, loader);
1329 }
1330 }
1331
1332 oop java_lang_Class::class_loader(oop java_class) {
1333 assert(_class_loader_offset != 0, "must be set");
1334 return java_class->obj_field(_class_loader_offset);
1335 }
1336
1337 oop java_lang_Class::module(oop java_class) {
1338 assert(_module_offset != 0, "must be set");
1339 return java_class->obj_field(_module_offset);
1340 }
1341
1342 void java_lang_Class::set_module(oop java_class, oop module) {
1343 assert(_module_offset != 0, "must be set");
1344 java_class->obj_field_put(_module_offset, module);
1345 }
1346
1347 oop java_lang_Class::name(Handle java_class, TRAPS) {
1348 assert(_name_offset != 0, "must be set");
1349 oop o = java_class->obj_field(_name_offset);
1350 if (o == NULL) {
1351 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1352 java_class->obj_field_put(_name_offset, o);
1353 }
1354 return o;
1355 }
1356
1357 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1358 // This should be improved by adding a field at the Java level or by
1359 // introducing a new VM klass (see comment in ClassFileParser)
1360 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1361 if (type != T_VOID) {
1362 Klass* aklass = Universe::typeArrayKlassObj(type);
1363 assert(aklass != NULL, "correct bootstrap");
1364 release_set_array_klass(java_class, aklass);
1365 }
1366 #ifdef ASSERT
1367 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1368 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1369 #endif
1370 return java_class;
1371 }
1372
1373
1374 Klass* java_lang_Class::as_Klass(oop java_class) {
1375 //%note memory_2
1376 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1377 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1378 assert(k == NULL || k->is_klass(), "type check");
1379 return k;
1380 }
1381
1382 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1383 //%note memory_2
1384 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1385 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1386 assert(k == NULL || k->is_klass(), "type check");
1387 return k;
1388 }
1389
1390
1391 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1392 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1393 java_class->metadata_field_put(_klass_offset, klass);
1394 }
1395
1396
1397 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1398 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1399 Symbol* name = NULL;
1400 bool is_instance = false;
1401 if (is_primitive(java_class)) {
1402 name = vmSymbols::type_signature(primitive_type(java_class));
1403 } else {
1404 Klass* k = as_Klass(java_class);
1405 is_instance = k->is_instance_klass();
1406 name = k->name();
1407 }
1408 if (name == NULL) {
1409 st->print("<null>");
1410 return;
1411 }
1412 if (is_instance) st->print("L");
1413 st->write((char*) name->base(), (int) name->utf8_length());
1414 if (is_instance) st->print(";");
1415 }
1416
1417 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1418 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1419 Symbol* name;
1420 if (is_primitive(java_class)) {
1421 name = vmSymbols::type_signature(primitive_type(java_class));
1422 // Because this can create a new symbol, the caller has to decrement
1423 // the refcount, so make adjustment here and below for symbols returned
1424 // that are not created or incremented due to a successful lookup.
1425 name->increment_refcount();
1426 } else {
1427 Klass* k = as_Klass(java_class);
1428 if (!k->is_instance_klass()) {
1429 name = k->name();
1430 name->increment_refcount();
1431 } else {
1432 ResourceMark rm;
1433 const char* sigstr = k->signature_name();
1434 int siglen = (int) strlen(sigstr);
1435 if (!intern_if_not_found) {
1436 name = SymbolTable::probe(sigstr, siglen);
1437 } else {
1438 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1439 }
1440 }
1441 }
1442 return name;
1443 }
1444
1445 // Returns the Java name for this Java mirror (Resource allocated)
1446 // See Klass::external_name().
1447 // For primitive type Java mirrors, its type name is returned.
1448 const char* java_lang_Class::as_external_name(oop java_class) {
1449 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1450 const char* name = NULL;
1451 if (is_primitive(java_class)) {
1452 name = type2name(primitive_type(java_class));
1453 } else {
1454 name = as_Klass(java_class)->external_name();
1455 }
1456 if (name == NULL) {
1457 name = "<null>";
1458 }
1459 return name;
1460 }
1461
1462 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1463 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1464 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1465 return k;
1466 }
1467
1468
1469 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1470 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1471 java_class->release_metadata_field_put(_array_klass_offset, klass);
1472 }
1473
1474
1475 BasicType java_lang_Class::primitive_type(oop java_class) {
1476 assert(java_lang_Class::is_primitive(java_class), "just checking");
1477 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1478 BasicType type = T_VOID;
1479 if (ak != NULL) {
1480 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1481 type = ArrayKlass::cast(ak)->element_type();
1482 } else {
1483 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1484 }
1485 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1486 return type;
1487 }
1488
1489 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1490 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1491 if (is_primitive(java_class)) {
1492 if (reference_klass != NULL)
1493 (*reference_klass) = NULL;
1494 return primitive_type(java_class);
1495 } else {
1496 if (reference_klass != NULL)
1497 (*reference_klass) = as_Klass(java_class);
1498 return T_OBJECT;
1499 }
1500 }
1501
1502
1503 oop java_lang_Class::primitive_mirror(BasicType t) {
1504 oop mirror = Universe::java_mirror(t);
1505 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1506 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1507 return mirror;
1508 }
1509
1510 bool java_lang_Class::offsets_computed = false;
1511 int java_lang_Class::classRedefinedCount_offset = -1;
1512
1513 #define CLASS_FIELDS_DO(macro) \
1514 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1515 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1516 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1517 macro(_module_offset, k, "module", module_signature, false); \
1518 macro(_name_offset, k, "name", string_signature, false); \
1519
1520 void java_lang_Class::compute_offsets() {
1521 if (offsets_computed) {
1522 return;
1523 }
1524
1525 offsets_computed = true;
1526
1527 InstanceKlass* k = SystemDictionary::Class_klass();
1528 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1529
1530 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1531 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1532 // GC treats them the same.
1533 _init_lock_offset = _component_mirror_offset;
1534
1535 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1536 }
1537
1538 #if INCLUDE_CDS
1539 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1540 f->do_u4((u4*)&offsets_computed);
1541 f->do_u4((u4*)&_init_lock_offset);
1542
1543 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1544
1545 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1546 }
1547 #endif
1548
1549 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1550 if (classRedefinedCount_offset == -1) {
1551 // If we don't have an offset for it then just return -1 as a marker.
1552 return -1;
1553 }
1554
1555 return the_class_mirror->int_field(classRedefinedCount_offset);
1556 }
1557
1558 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1559 if (classRedefinedCount_offset == -1) {
1560 // If we don't have an offset for it then nothing to set.
1561 return;
1562 }
1563
1564 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1565 }
1566
1567
1568 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1569 // platform thread structure, and a eetop offset which was used for thread
1570 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1571 // merged, so in the HotSpot VM we just use the eetop field for the thread
1572 // instead of the privateInfo_offset.
1573 //
1574 // Note: The stackSize field is only present starting in 1.4.
1575
1576 int java_lang_Thread::_name_offset = 0;
1577 int java_lang_Thread::_group_offset = 0;
1578 int java_lang_Thread::_contextClassLoader_offset = 0;
1579 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1580 int java_lang_Thread::_priority_offset = 0;
1581 int java_lang_Thread::_eetop_offset = 0;
1582 int java_lang_Thread::_daemon_offset = 0;
1583 int java_lang_Thread::_stillborn_offset = 0;
1584 int java_lang_Thread::_stackSize_offset = 0;
1585 int java_lang_Thread::_tid_offset = 0;
1586 int java_lang_Thread::_thread_status_offset = 0;
1587 int java_lang_Thread::_park_blocker_offset = 0;
1588 int java_lang_Thread::_park_event_offset = 0 ;
1589
1590 #define THREAD_FIELDS_DO(macro) \
1591 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1592 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1593 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1594 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1595 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1596 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1597 macro(_eetop_offset, k, "eetop", long_signature, false); \
1598 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1599 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1600 macro(_tid_offset, k, "tid", long_signature, false); \
1601 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1602 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1603 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1604
1605 void java_lang_Thread::compute_offsets() {
1606 assert(_group_offset == 0, "offsets should be initialized only once");
1607
1608 InstanceKlass* k = SystemDictionary::Thread_klass();
1609 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1610 }
1611
1612 #if INCLUDE_CDS
1613 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1614 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1615 }
1616 #endif
1617
1618 JavaThread* java_lang_Thread::thread(oop java_thread) {
1619 return (JavaThread*)java_thread->address_field(_eetop_offset);
1620 }
1621
1622
1623 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1624 java_thread->address_field_put(_eetop_offset, (address)thread);
1625 }
1626
1627
1628 oop java_lang_Thread::name(oop java_thread) {
1629 return java_thread->obj_field(_name_offset);
1630 }
1631
1632
1633 void java_lang_Thread::set_name(oop java_thread, oop name) {
1634 java_thread->obj_field_put(_name_offset, name);
1635 }
1636
1637
1638 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1639 return (ThreadPriority)java_thread->int_field(_priority_offset);
1640 }
1641
1642
1643 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1644 java_thread->int_field_put(_priority_offset, priority);
1645 }
1646
1647
1648 oop java_lang_Thread::threadGroup(oop java_thread) {
1649 return java_thread->obj_field(_group_offset);
1650 }
1651
1652
1653 bool java_lang_Thread::is_stillborn(oop java_thread) {
1654 return java_thread->bool_field(_stillborn_offset) != 0;
1655 }
1656
1657
1658 // We never have reason to turn the stillborn bit off
1659 void java_lang_Thread::set_stillborn(oop java_thread) {
1660 java_thread->bool_field_put(_stillborn_offset, true);
1661 }
1662
1663
1664 bool java_lang_Thread::is_alive(oop java_thread) {
1665 JavaThread* thr = java_lang_Thread::thread(java_thread);
1666 return (thr != NULL);
1667 }
1668
1669
1670 bool java_lang_Thread::is_daemon(oop java_thread) {
1671 return java_thread->bool_field(_daemon_offset) != 0;
1672 }
1673
1674
1675 void java_lang_Thread::set_daemon(oop java_thread) {
1676 java_thread->bool_field_put(_daemon_offset, true);
1677 }
1678
1679 oop java_lang_Thread::context_class_loader(oop java_thread) {
1680 return java_thread->obj_field(_contextClassLoader_offset);
1681 }
1682
1683 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1684 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1685 }
1686
1687
1688 jlong java_lang_Thread::stackSize(oop java_thread) {
1689 if (_stackSize_offset > 0) {
1690 return java_thread->long_field(_stackSize_offset);
1691 } else {
1692 return 0;
1693 }
1694 }
1695
1696 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1697 void java_lang_Thread::set_thread_status(oop java_thread,
1698 java_lang_Thread::ThreadStatus status) {
1699 // The threadStatus is only present starting in 1.5
1700 if (_thread_status_offset > 0) {
1701 java_thread->int_field_put(_thread_status_offset, status);
1702 }
1703 }
1704
1705 // Read thread status value from threadStatus field in java.lang.Thread java class.
1706 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1707 // Make sure the caller is operating on behalf of the VM or is
1708 // running VM code (state == _thread_in_vm).
1709 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1710 JavaThread::current()->thread_state() == _thread_in_vm,
1711 "Java Thread is not running in vm");
1712 // The threadStatus is only present starting in 1.5
1713 if (_thread_status_offset > 0) {
1714 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1715 } else {
1716 // All we can easily figure out is if it is alive, but that is
1717 // enough info for a valid unknown status.
1718 // These aren't restricted to valid set ThreadStatus values, so
1719 // use JVMTI values and cast.
1720 JavaThread* thr = java_lang_Thread::thread(java_thread);
1721 if (thr == NULL) {
1722 // the thread hasn't run yet or is in the process of exiting
1723 return NEW;
1724 }
1725 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1726 }
1727 }
1728
1729
1730 jlong java_lang_Thread::thread_id(oop java_thread) {
1731 // The thread ID field is only present starting in 1.5
1732 if (_tid_offset > 0) {
1733 return java_thread->long_field(_tid_offset);
1734 } else {
1735 return 0;
1736 }
1737 }
1738
1739 oop java_lang_Thread::park_blocker(oop java_thread) {
1740 assert(JDK_Version::current().supports_thread_park_blocker() &&
1741 _park_blocker_offset != 0, "Must support parkBlocker field");
1742
1743 if (_park_blocker_offset > 0) {
1744 return java_thread->obj_field(_park_blocker_offset);
1745 }
1746
1747 return NULL;
1748 }
1749
1750 jlong java_lang_Thread::park_event(oop java_thread) {
1751 if (_park_event_offset > 0) {
1752 return java_thread->long_field(_park_event_offset);
1753 }
1754 return 0;
1755 }
1756
1757 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1758 if (_park_event_offset > 0) {
1759 java_thread->long_field_put(_park_event_offset, ptr);
1760 return true;
1761 }
1762 return false;
1763 }
1764
1765
1766 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1767 assert(_thread_status_offset != 0, "Must have thread status");
1768 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1769 switch (status) {
1770 case NEW : return "NEW";
1771 case RUNNABLE : return "RUNNABLE";
1772 case SLEEPING : return "TIMED_WAITING (sleeping)";
1773 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1774 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1775 case PARKED : return "WAITING (parking)";
1776 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1777 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1778 case TERMINATED : return "TERMINATED";
1779 default : return "UNKNOWN";
1780 };
1781 }
1782 int java_lang_ThreadGroup::_parent_offset = 0;
1783 int java_lang_ThreadGroup::_name_offset = 0;
1784 int java_lang_ThreadGroup::_threads_offset = 0;
1785 int java_lang_ThreadGroup::_groups_offset = 0;
1786 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1787 int java_lang_ThreadGroup::_destroyed_offset = 0;
1788 int java_lang_ThreadGroup::_daemon_offset = 0;
1789 int java_lang_ThreadGroup::_nthreads_offset = 0;
1790 int java_lang_ThreadGroup::_ngroups_offset = 0;
1791
1792 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1793 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1794 return java_thread_group->obj_field(_parent_offset);
1795 }
1796
1797 // ("name as oop" accessor is not necessary)
1798
1799 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1800 oop name = java_thread_group->obj_field(_name_offset);
1801 // ThreadGroup.name can be null
1802 if (name != NULL) {
1803 return java_lang_String::as_utf8_string(name);
1804 }
1805 return NULL;
1806 }
1807
1808 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1809 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1810 return java_thread_group->int_field(_nthreads_offset);
1811 }
1812
1813 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1814 oop threads = java_thread_group->obj_field(_threads_offset);
1815 assert(threads != NULL, "threadgroups should have threads");
1816 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1817 return objArrayOop(threads);
1818 }
1819
1820 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1821 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1822 return java_thread_group->int_field(_ngroups_offset);
1823 }
1824
1825 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1826 oop groups = java_thread_group->obj_field(_groups_offset);
1827 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1828 return objArrayOop(groups);
1829 }
1830
1831 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1832 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1833 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1834 }
1835
1836 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1837 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1838 return java_thread_group->bool_field(_destroyed_offset) != 0;
1839 }
1840
1841 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1842 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1843 return java_thread_group->bool_field(_daemon_offset) != 0;
1844 }
1845
1846 #define THREADGROUP_FIELDS_DO(macro) \
1847 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1848 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1849 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1850 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1851 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1852 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1853 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1854 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1855 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1856
1857 void java_lang_ThreadGroup::compute_offsets() {
1858 assert(_parent_offset == 0, "offsets should be initialized only once");
1859
1860 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1861 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1862 }
1863
1864 #if INCLUDE_CDS
1865 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1866 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1867 }
1868 #endif
1869
1870 #define THROWABLE_FIELDS_DO(macro) \
1871 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1872 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1873 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1874 macro(depth_offset, k, "depth", int_signature, false); \
1875 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1876
1877 void java_lang_Throwable::compute_offsets() {
1878 InstanceKlass* k = SystemDictionary::Throwable_klass();
1879 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1880 }
1881
1882 #if INCLUDE_CDS
1883 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1884 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1885 }
1886 #endif
1887
1888 oop java_lang_Throwable::unassigned_stacktrace() {
1889 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1890 oop base = ik->static_field_base_raw();
1891 return base->obj_field(static_unassigned_stacktrace_offset);
1892 }
1893
1894 oop java_lang_Throwable::backtrace(oop throwable) {
1895 return throwable->obj_field_acquire(backtrace_offset);
1896 }
1897
1898
1899 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1900 throwable->release_obj_field_put(backtrace_offset, value);
1901 }
1902
1903 int java_lang_Throwable::depth(oop throwable) {
1904 return throwable->int_field(depth_offset);
1905 }
1906
1907 void java_lang_Throwable::set_depth(oop throwable, int value) {
1908 throwable->int_field_put(depth_offset, value);
1909 }
1910
1911 oop java_lang_Throwable::message(oop throwable) {
1912 return throwable->obj_field(detailMessage_offset);
1913 }
1914
1915
1916 // Return Symbol for detailed_message or NULL
1917 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1918 PRESERVE_EXCEPTION_MARK; // Keep original exception
1919 oop detailed_message = java_lang_Throwable::message(throwable);
1920 if (detailed_message != NULL) {
1921 return java_lang_String::as_symbol(detailed_message, THREAD);
1922 }
1923 return NULL;
1924 }
1925
1926 void java_lang_Throwable::set_message(oop throwable, oop value) {
1927 throwable->obj_field_put(detailMessage_offset, value);
1928 }
1929
1930
1931 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1932 throwable->obj_field_put(stackTrace_offset, st_element_array);
1933 }
1934
1935 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1936 set_stacktrace(throwable, NULL);
1937 }
1938
1939
1940 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1941 ResourceMark rm;
1942 Klass* k = throwable->klass();
1943 assert(k != NULL, "just checking");
1944 st->print("%s", k->external_name());
1945 oop msg = message(throwable);
1946 if (msg != NULL) {
1947 st->print(": %s", java_lang_String::as_utf8_string(msg));
1948 }
1949 }
1950
1951 // After this many redefines, the stack trace is unreliable.
1952 const int MAX_VERSION = USHRT_MAX;
1953
1954 static inline bool version_matches(Method* method, int version) {
1955 assert(version < MAX_VERSION, "version is too big");
1956 return method != NULL && (method->constants()->version() == version);
1957 }
1958
1959
1960 // This class provides a simple wrapper over the internal structure of
1961 // exception backtrace to insulate users of the backtrace from needing
1962 // to know what it looks like.
1963 class BacktraceBuilder: public StackObj {
1964 friend class BacktraceIterator;
1965 private:
1966 Handle _backtrace;
1967 objArrayOop _head;
1968 typeArrayOop _methods;
1969 typeArrayOop _bcis;
1970 objArrayOop _mirrors;
1971 typeArrayOop _names; // needed to insulate method name against redefinition
1972 int _index;
1973 NoSafepointVerifier _nsv;
1974
1975 enum {
1976 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1977 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1978 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1979 trace_names_offset = java_lang_Throwable::trace_names_offset,
1980 trace_next_offset = java_lang_Throwable::trace_next_offset,
1981 trace_size = java_lang_Throwable::trace_size,
1982 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1983 };
1984
1985 // get info out of chunks
1986 static typeArrayOop get_methods(objArrayHandle chunk) {
1987 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1988 assert(methods != NULL, "method array should be initialized in backtrace");
1989 return methods;
1990 }
1991 static typeArrayOop get_bcis(objArrayHandle chunk) {
1992 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1993 assert(bcis != NULL, "bci array should be initialized in backtrace");
1994 return bcis;
1995 }
1996 static objArrayOop get_mirrors(objArrayHandle chunk) {
1997 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1998 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1999 return mirrors;
2000 }
2001 static typeArrayOop get_names(objArrayHandle chunk) {
2002 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2003 assert(names != NULL, "names array should be initialized in backtrace");
2004 return names;
2005 }
2006
2007 public:
2008
2009 // constructor for new backtrace
2010 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2011 expand(CHECK);
2012 _backtrace = Handle(THREAD, _head);
2013 _index = 0;
2014 }
2015
2016 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2017 _methods = get_methods(backtrace);
2018 _bcis = get_bcis(backtrace);
2019 _mirrors = get_mirrors(backtrace);
2020 _names = get_names(backtrace);
2021 assert(_methods->length() == _bcis->length() &&
2022 _methods->length() == _mirrors->length() &&
2023 _mirrors->length() == _names->length(),
2024 "method and source information arrays should match");
2025
2026 // head is the preallocated backtrace
2027 _head = backtrace();
2028 _backtrace = Handle(thread, _head);
2029 _index = 0;
2030 }
2031
2032 void expand(TRAPS) {
2033 objArrayHandle old_head(THREAD, _head);
2034 PauseNoSafepointVerifier pnsv(&_nsv);
2035
2036 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2037 objArrayHandle new_head(THREAD, head);
2038
2039 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2040 typeArrayHandle new_methods(THREAD, methods);
2041
2042 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2043 typeArrayHandle new_bcis(THREAD, bcis);
2044
2045 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2046 objArrayHandle new_mirrors(THREAD, mirrors);
2047
2048 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2049 typeArrayHandle new_names(THREAD, names);
2050
2051 if (!old_head.is_null()) {
2052 old_head->obj_at_put(trace_next_offset, new_head());
2053 }
2054 new_head->obj_at_put(trace_methods_offset, new_methods());
2055 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2056 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2057 new_head->obj_at_put(trace_names_offset, new_names());
2058
2059 _head = new_head();
2060 _methods = new_methods();
2061 _bcis = new_bcis();
2062 _mirrors = new_mirrors();
2063 _names = new_names();
2064 _index = 0;
2065 }
2066
2067 oop backtrace() {
2068 return _backtrace();
2069 }
2070
2071 inline void push(Method* method, int bci, TRAPS) {
2072 // Smear the -1 bci to 0 since the array only holds unsigned
2073 // shorts. The later line number lookup would just smear the -1
2074 // to a 0 even if it could be recorded.
2075 if (bci == SynchronizationEntryBCI) bci = 0;
2076
2077 if (_index >= trace_chunk_size) {
2078 methodHandle mhandle(THREAD, method);
2079 expand(CHECK);
2080 method = mhandle();
2081 }
2082
2083 _methods->ushort_at_put(_index, method->orig_method_idnum());
2084 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2085
2086 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2087 // klass owning the symbols alive so their refcounts aren't decremented.
2088 Symbol* name = method->name();
2089 _names->symbol_at_put(_index, name);
2090
2091 // We need to save the mirrors in the backtrace to keep the class
2092 // from being unloaded while we still have this stack trace.
2093 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2094 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2095 _index++;
2096 }
2097
2098 };
2099
2100 struct BacktraceElement : public StackObj {
2101 int _method_id;
2102 int _bci;
2103 int _version;
2104 Symbol* _name;
2105 Handle _mirror;
2106 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2107 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2108 };
2109
2110 class BacktraceIterator : public StackObj {
2111 int _index;
2112 objArrayHandle _result;
2113 objArrayHandle _mirrors;
2114 typeArrayHandle _methods;
2115 typeArrayHandle _bcis;
2116 typeArrayHandle _names;
2117
2118 void init(objArrayHandle result, Thread* thread) {
2119 // Get method id, bci, version and mirror from chunk
2120 _result = result;
2121 if (_result.not_null()) {
2122 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2123 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2124 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2125 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2126 _index = 0;
2127 }
2128 }
2129 public:
2130 BacktraceIterator(objArrayHandle result, Thread* thread) {
2131 init(result, thread);
2132 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2133 }
2134
2135 BacktraceElement next(Thread* thread) {
2136 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2137 _methods->ushort_at(_index),
2138 Backtrace::version_at(_bcis->int_at(_index)),
2139 Backtrace::bci_at(_bcis->int_at(_index)),
2140 _names->symbol_at(_index));
2141 _index++;
2142
2143 if (_index >= java_lang_Throwable::trace_chunk_size) {
2144 int next_offset = java_lang_Throwable::trace_next_offset;
2145 // Get next chunk
2146 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2147 init(result, thread);
2148 }
2149 return e;
2150 }
2151
2152 bool repeat() {
2153 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2154 }
2155 };
2156
2157
2158 // Print stack trace element to resource allocated buffer
2159 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2160 int version, int bci, Symbol* name) {
2161 ResourceMark rm;
2162
2163 // Get strings and string lengths
2164 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2165 const char* klass_name = holder->external_name();
2166 int buf_len = (int)strlen(klass_name);
2167
2168 char* method_name = name->as_C_string();
2169 buf_len += (int)strlen(method_name);
2170
2171 char* source_file_name = NULL;
2172 Symbol* source = Backtrace::get_source_file_name(holder, version);
2173 if (source != NULL) {
2174 source_file_name = source->as_C_string();
2175 buf_len += (int)strlen(source_file_name);
2176 }
2177
2178 char *module_name = NULL, *module_version = NULL;
2179 ModuleEntry* module = holder->module();
2180 if (module->is_named()) {
2181 module_name = module->name()->as_C_string();
2182 buf_len += (int)strlen(module_name);
2183 if (module->version() != NULL) {
2184 module_version = module->version()->as_C_string();
2185 buf_len += (int)strlen(module_version);
2186 }
2187 }
2188
2189 // Allocate temporary buffer with extra space for formatting and line number
2190 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2191
2192 // Print stack trace line in buffer
2193 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2194
2195 // Print module information
2196 if (module_name != NULL) {
2197 if (module_version != NULL) {
2198 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2199 } else {
2200 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2201 }
2202 }
2203
2204 // The method can be NULL if the requested class version is gone
2205 Method* method = holder->method_with_orig_idnum(method_id, version);
2206 if (!version_matches(method, version)) {
2207 strcat(buf, "Redefined)");
2208 } else {
2209 int line_number = Backtrace::get_line_number(method, bci);
2210 if (line_number == -2) {
2211 strcat(buf, "Native Method)");
2212 } else {
2213 if (source_file_name != NULL && (line_number != -1)) {
2214 // Sourcename and linenumber
2215 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2216 } else if (source_file_name != NULL) {
2217 // Just sourcename
2218 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2219 } else {
2220 // Neither sourcename nor linenumber
2221 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2222 }
2223 CompiledMethod* nm = method->code();
2224 if (WizardMode && nm != NULL) {
2225 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2226 }
2227 }
2228 }
2229
2230 st->print_cr("%s", buf);
2231 }
2232
2233 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2234 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2235 int method_id = method->orig_method_idnum();
2236 int version = method->constants()->version();
2237 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2238 }
2239
2240 /**
2241 * Print the throwable message and its stack trace plus all causes by walking the
2242 * cause chain. The output looks the same as of Throwable.printStackTrace().
2243 */
2244 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2245 // First, print the message.
2246 print(throwable(), st);
2247 st->cr();
2248
2249 // Now print the stack trace.
2250 Thread* THREAD = Thread::current();
2251 while (throwable.not_null()) {
2252 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2253 if (result.is_null()) {
2254 st->print_raw_cr("\t<<no stack trace available>>");
2255 return;
2256 }
2257 BacktraceIterator iter(result, THREAD);
2258
2259 while (iter.repeat()) {
2260 BacktraceElement bte = iter.next(THREAD);
2261 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2262 }
2263 {
2264 // Call getCause() which doesn't necessarily return the _cause field.
2265 EXCEPTION_MARK;
2266 JavaValue cause(T_OBJECT);
2267 JavaCalls::call_virtual(&cause,
2268 throwable,
2269 throwable->klass(),
2270 vmSymbols::getCause_name(),
2271 vmSymbols::void_throwable_signature(),
2272 THREAD);
2273 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2274 if (HAS_PENDING_EXCEPTION) {
2275 CLEAR_PENDING_EXCEPTION;
2276 throwable = Handle();
2277 } else {
2278 throwable = Handle(THREAD, (oop) cause.get_jobject());
2279 if (throwable.not_null()) {
2280 st->print("Caused by: ");
2281 print(throwable(), st);
2282 st->cr();
2283 }
2284 }
2285 }
2286 }
2287 }
2288
2289 /**
2290 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2291 */
2292 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2293 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2294 JavaValue result(T_VOID);
2295 JavaCalls::call_virtual(&result,
2296 throwable,
2297 SystemDictionary::Throwable_klass(),
2298 vmSymbols::printStackTrace_name(),
2299 vmSymbols::void_method_signature(),
2300 THREAD);
2301 }
2302
2303 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2304 if (!StackTraceInThrowable) return;
2305 ResourceMark rm(THREAD);
2306
2307 // Start out by clearing the backtrace for this object, in case the VM
2308 // runs out of memory while allocating the stack trace
2309 set_backtrace(throwable(), NULL);
2310 // Clear lazily constructed Java level stacktrace if refilling occurs
2311 // This is unnecessary in 1.7+ but harmless
2312 clear_stacktrace(throwable());
2313
2314 int max_depth = MaxJavaStackTraceDepth;
2315 JavaThread* thread = (JavaThread*)THREAD;
2316
2317 BacktraceBuilder bt(CHECK);
2318
2319 // If there is no Java frame just return the method that was being called
2320 // with bci 0
2321 if (!thread->has_last_Java_frame()) {
2322 if (max_depth >= 1 && method() != NULL) {
2323 bt.push(method(), 0, CHECK);
2324 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2325 set_depth(throwable(), 1);
2326 set_backtrace(throwable(), bt.backtrace());
2327 }
2328 return;
2329 }
2330
2331 // Instead of using vframe directly, this version of fill_in_stack_trace
2332 // basically handles everything by hand. This significantly improved the
2333 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2334 // See bug 6333838 for more details.
2335 // The "ASSERT" here is to verify this method generates the exactly same stack
2336 // trace as utilizing vframe.
2337 #ifdef ASSERT
2338 vframeStream st(thread);
2339 methodHandle st_method(THREAD, st.method());
2340 #endif
2341 int total_count = 0;
2342 RegisterMap map(thread, false);
2343 int decode_offset = 0;
2344 CompiledMethod* nm = NULL;
2345 bool skip_fillInStackTrace_check = false;
2346 bool skip_throwableInit_check = false;
2347 bool skip_hidden = !ShowHiddenFrames;
2348
2349 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2350 Method* method = NULL;
2351 int bci = 0;
2352
2353 // Compiled java method case.
2354 if (decode_offset != 0) {
2355 DebugInfoReadStream stream(nm, decode_offset);
2356 decode_offset = stream.read_int();
2357 method = (Method*)nm->metadata_at(stream.read_int());
2358 bci = stream.read_bci();
2359 } else {
2360 if (fr.is_first_frame()) break;
2361 address pc = fr.pc();
2362 if (fr.is_interpreted_frame()) {
2363 address bcp = fr.interpreter_frame_bcp();
2364 method = fr.interpreter_frame_method();
2365 bci = method->bci_from(bcp);
2366 fr = fr.sender(&map);
2367 } else {
2368 CodeBlob* cb = fr.cb();
2369 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2370 // but non nmethod
2371 fr = fr.sender(&map);
2372 if (cb == NULL || !cb->is_compiled()) {
2373 continue;
2374 }
2375 nm = cb->as_compiled_method();
2376 if (nm->method()->is_native()) {
2377 method = nm->method();
2378 bci = 0;
2379 } else {
2380 PcDesc* pd = nm->pc_desc_at(pc);
2381 decode_offset = pd->scope_decode_offset();
2382 // if decode_offset is not equal to 0, it will execute the
2383 // "compiled java method case" at the beginning of the loop.
2384 continue;
2385 }
2386 }
2387 }
2388 #ifdef ASSERT
2389 assert(st_method() == method && st.bci() == bci,
2390 "Wrong stack trace");
2391 st.next();
2392 // vframeStream::method isn't GC-safe so store off a copy
2393 // of the Method* in case we GC.
2394 if (!st.at_end()) {
2395 st_method = st.method();
2396 }
2397 #endif
2398
2399 // the format of the stacktrace will be:
2400 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2401 // - 0 or more <init> methods for the exception class (skipped)
2402 // - rest of the stack
2403
2404 if (!skip_fillInStackTrace_check) {
2405 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2406 throwable->is_a(method->method_holder())) {
2407 continue;
2408 }
2409 else {
2410 skip_fillInStackTrace_check = true; // gone past them all
2411 }
2412 }
2413 if (!skip_throwableInit_check) {
2414 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2415
2416 // skip <init> methods of the exception class and superclasses
2417 // This is simlar to classic VM.
2418 if (method->name() == vmSymbols::object_initializer_name() &&
2419 throwable->is_a(method->method_holder())) {
2420 continue;
2421 } else {
2422 // there are none or we've seen them all - either way stop checking
2423 skip_throwableInit_check = true;
2424 }
2425 }
2426 if (method->is_hidden()) {
2427 if (skip_hidden) continue;
2428 }
2429 bt.push(method, bci, CHECK);
2430 total_count++;
2431 }
2432
2433 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2434
2435 // Put completed stack trace into throwable object
2436 set_backtrace(throwable(), bt.backtrace());
2437 set_depth(throwable(), total_count);
2438 }
2439
2440 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2441 // No-op if stack trace is disabled
2442 if (!StackTraceInThrowable) {
2443 return;
2444 }
2445
2446 // Disable stack traces for some preallocated out of memory errors
2447 if (!Universe::should_fill_in_stack_trace(throwable)) {
2448 return;
2449 }
2450
2451 PRESERVE_EXCEPTION_MARK;
2452
2453 JavaThread* thread = JavaThread::active();
2454 fill_in_stack_trace(throwable, method, thread);
2455 // ignore exceptions thrown during stack trace filling
2456 CLEAR_PENDING_EXCEPTION;
2457 }
2458
2459 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2460 // Allocate stack trace - backtrace is created but not filled in
2461
2462 // No-op if stack trace is disabled
2463 if (!StackTraceInThrowable) return;
2464 BacktraceBuilder bt(CHECK); // creates a backtrace
2465 set_backtrace(throwable(), bt.backtrace());
2466 }
2467
2468
2469 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2470 // Fill in stack trace into preallocated backtrace (no GC)
2471
2472 // No-op if stack trace is disabled
2473 if (!StackTraceInThrowable) return;
2474
2475 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2476
2477 JavaThread* THREAD = JavaThread::current();
2478
2479 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2480 assert(backtrace.not_null(), "backtrace should have been preallocated");
2481
2482 ResourceMark rm(THREAD);
2483 vframeStream st(THREAD);
2484
2485 BacktraceBuilder bt(THREAD, backtrace);
2486
2487 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2488 // methods as preallocated errors aren't created by "java" code.
2489
2490 // fill in as much stack trace as possible
2491 int chunk_count = 0;
2492 for (;!st.at_end(); st.next()) {
2493 bt.push(st.method(), st.bci(), CHECK);
2494 chunk_count++;
2495
2496 // Bail-out for deep stacks
2497 if (chunk_count >= trace_chunk_size) break;
2498 }
2499 set_depth(throwable(), chunk_count);
2500 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2501
2502 // We support the Throwable immutability protocol defined for Java 7.
2503 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2504 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2505 }
2506
2507 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2508 objArrayHandle stack_trace_array_h, TRAPS) {
2509
2510 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2511 THROW(vmSymbols::java_lang_NullPointerException());
2512 }
2513
2514 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2515
2516 if (stack_trace_array_h->length() != depth(throwable())) {
2517 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2518 }
2519
2520 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2521 BacktraceIterator iter(result, THREAD);
2522
2523 int index = 0;
2524 while (iter.repeat()) {
2525 BacktraceElement bte = iter.next(THREAD);
2526
2527 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2528
2529 if (stack_trace_element.is_null()) {
2530 THROW(vmSymbols::java_lang_NullPointerException());
2531 }
2532
2533 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2534 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2535
2536 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2537 method,
2538 bte._version,
2539 bte._bci,
2540 bte._name, CHECK);
2541 }
2542 }
2543
2544 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2545 // Allocate java.lang.StackTraceElement instance
2546 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2547 assert(k != NULL, "must be loaded in 1.4+");
2548 if (k->should_be_initialized()) {
2549 k->initialize(CHECK_0);
2550 }
2551
2552 Handle element = k->allocate_instance_handle(CHECK_0);
2553
2554 int version = method->constants()->version();
2555 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2556 return element();
2557 }
2558
2559 void java_lang_StackTraceElement::fill_in(Handle element,
2560 InstanceKlass* holder, const methodHandle& method,
2561 int version, int bci, Symbol* name, TRAPS) {
2562 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2563
2564 ResourceMark rm(THREAD);
2565 HandleMark hm(THREAD);
2566
2567 // Fill in class name
2568 Handle java_class(THREAD, holder->java_mirror());
2569 oop classname = java_lang_Class::name(java_class, CHECK);
2570 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2571 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2572
2573 oop loader = holder->class_loader();
2574 if (loader != NULL) {
2575 oop loader_name = java_lang_ClassLoader::name(loader);
2576 if (loader_name != NULL)
2577 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2578 }
2579
2580 // Fill in method name
2581 oop methodname = StringTable::intern(name, CHECK);
2582 java_lang_StackTraceElement::set_methodName(element(), methodname);
2583
2584 // Fill in module name and version
2585 ModuleEntry* module = holder->module();
2586 if (module->is_named()) {
2587 oop module_name = StringTable::intern(module->name(), CHECK);
2588 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2589 oop module_version;
2590 if (module->version() != NULL) {
2591 module_version = StringTable::intern(module->version(), CHECK);
2592 } else {
2593 module_version = NULL;
2594 }
2595 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2596 }
2597
2598 if (method() == NULL || !version_matches(method(), version)) {
2599 // The method was redefined, accurate line number information isn't available
2600 java_lang_StackTraceElement::set_fileName(element(), NULL);
2601 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2602 } else {
2603 // Fill in source file name and line number.
2604 Symbol* source = Backtrace::get_source_file_name(holder, version);
2605 if (ShowHiddenFrames && source == NULL)
2606 source = vmSymbols::unknown_class_name();
2607 oop filename = StringTable::intern(source, CHECK);
2608 java_lang_StackTraceElement::set_fileName(element(), filename);
2609
2610 int line_number = Backtrace::get_line_number(method, bci);
2611 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2612 }
2613 }
2614
2615 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2616 HandleMark hm(THREAD);
2617 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2618 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2619 // we should expand MemberName::name when Throwable uses StackTrace
2620 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2621 return method;
2622 }
2623
2624 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2625 // set Method* or mid/cpref
2626 HandleMark hm(THREAD);
2627 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2628 InstanceKlass* ik = method->method_holder();
2629 CallInfo info(method(), ik, CHECK);
2630 MethodHandles::init_method_MemberName(mname, info);
2631 // set bci
2632 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2633 // method may be redefined; store the version
2634 int version = method->constants()->version();
2635 assert((jushort)version == version, "version should be short");
2636 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2637 }
2638
2639 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2640 ResourceMark rm(THREAD);
2641 HandleMark hm(THREAD);
2642 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2643 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2644 InstanceKlass* holder = InstanceKlass::cast(clazz);
2645 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2646
2647 short version = stackFrame->short_field(_version_offset);
2648 short bci = stackFrame->short_field(_bci_offset);
2649 Symbol* name = method->name();
2650 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2651 }
2652
2653 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2654 macro(_memberName_offset, k, "memberName", object_signature, false); \
2655 macro(_bci_offset, k, "bci", short_signature, false)
2656
2657 void java_lang_StackFrameInfo::compute_offsets() {
2658 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2659 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2660 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2661 }
2662
2663 #if INCLUDE_CDS
2664 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2665 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2666 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2667 }
2668 #endif
2669
2670 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2671 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2672 macro(_locals_offset, k, "locals", object_array_signature, false); \
2673 macro(_operands_offset, k, "operands", object_array_signature, false); \
2674 macro(_mode_offset, k, "mode", int_signature, false)
2675
2676 void java_lang_LiveStackFrameInfo::compute_offsets() {
2677 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2678 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2679 }
2680
2681 #if INCLUDE_CDS
2682 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2683 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2684 }
2685 #endif
2686
2687 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2688 macro(override_offset, k, "override", bool_signature, false)
2689
2690 void java_lang_reflect_AccessibleObject::compute_offsets() {
2691 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2692 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2693 }
2694
2695 #if INCLUDE_CDS
2696 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2697 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2698 }
2699 #endif
2700
2701 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2702 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2703 return (jboolean) reflect->bool_field(override_offset);
2704 }
2705
2706 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2708 reflect->bool_field_put(override_offset, (int) value);
2709 }
2710
2711 #define METHOD_FIELDS_DO(macro) \
2712 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2713 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2714 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2715 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2716 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2717 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2718 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2719 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2720 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2721 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2722 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2723
2724 void java_lang_reflect_Method::compute_offsets() {
2725 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2726 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2727 }
2728
2729 #if INCLUDE_CDS
2730 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2731 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2732 }
2733 #endif
2734
2735 Handle java_lang_reflect_Method::create(TRAPS) {
2736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2737 Klass* klass = SystemDictionary::reflect_Method_klass();
2738 // This class is eagerly initialized during VM initialization, since we keep a refence
2739 // to one of the methods
2740 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2741 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2742 }
2743
2744 oop java_lang_reflect_Method::clazz(oop reflect) {
2745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2746 return reflect->obj_field(clazz_offset);
2747 }
2748
2749 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2751 reflect->obj_field_put(clazz_offset, value);
2752 }
2753
2754 int java_lang_reflect_Method::slot(oop reflect) {
2755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2756 return reflect->int_field(slot_offset);
2757 }
2758
2759 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2761 reflect->int_field_put(slot_offset, value);
2762 }
2763
2764 void java_lang_reflect_Method::set_name(oop method, oop value) {
2765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2766 method->obj_field_put(name_offset, value);
2767 }
2768
2769 oop java_lang_reflect_Method::return_type(oop method) {
2770 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2771 return method->obj_field(returnType_offset);
2772 }
2773
2774 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2776 method->obj_field_put(returnType_offset, value);
2777 }
2778
2779 oop java_lang_reflect_Method::parameter_types(oop method) {
2780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2781 return method->obj_field(parameterTypes_offset);
2782 }
2783
2784 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2786 method->obj_field_put(parameterTypes_offset, value);
2787 }
2788
2789 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2791 method->obj_field_put(exceptionTypes_offset, value);
2792 }
2793
2794 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2795 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2796 method->int_field_put(modifiers_offset, value);
2797 }
2798
2799 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2801 method->obj_field_put(signature_offset, value);
2802 }
2803
2804 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2806 method->obj_field_put(annotations_offset, value);
2807 }
2808
2809 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2811 method->obj_field_put(parameter_annotations_offset, value);
2812 }
2813
2814 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2816 method->obj_field_put(annotation_default_offset, value);
2817 }
2818
2819 #define CONSTRUCTOR_FIELDS_DO(macro) \
2820 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2821 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2822 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2823 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2824 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2825 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2826 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2827 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2828
2829 void java_lang_reflect_Constructor::compute_offsets() {
2830 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2831 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2832 }
2833
2834 #if INCLUDE_CDS
2835 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2836 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2837 }
2838 #endif
2839
2840 Handle java_lang_reflect_Constructor::create(TRAPS) {
2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2842 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2843 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2844 InstanceKlass* ik = InstanceKlass::cast(k);
2845 // Ensure it is initialized
2846 ik->initialize(CHECK_NH);
2847 return ik->allocate_instance_handle(THREAD);
2848 }
2849
2850 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2852 return reflect->obj_field(clazz_offset);
2853 }
2854
2855 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2856 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2857 reflect->obj_field_put(clazz_offset, value);
2858 }
2859
2860 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2862 return constructor->obj_field(parameterTypes_offset);
2863 }
2864
2865 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2867 constructor->obj_field_put(parameterTypes_offset, value);
2868 }
2869
2870 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2872 constructor->obj_field_put(exceptionTypes_offset, value);
2873 }
2874
2875 int java_lang_reflect_Constructor::slot(oop reflect) {
2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877 return reflect->int_field(slot_offset);
2878 }
2879
2880 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882 reflect->int_field_put(slot_offset, value);
2883 }
2884
2885 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887 constructor->int_field_put(modifiers_offset, value);
2888 }
2889
2890 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892 constructor->obj_field_put(signature_offset, value);
2893 }
2894
2895 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897 constructor->obj_field_put(annotations_offset, value);
2898 }
2899
2900 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902 method->obj_field_put(parameter_annotations_offset, value);
2903 }
2904
2905 #define FIELD_FIELDS_DO(macro) \
2906 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2907 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2908 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2909 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2910 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2911 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2912 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2913
2914 void java_lang_reflect_Field::compute_offsets() {
2915 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2916 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2917 }
2918
2919 #if INCLUDE_CDS
2920 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2921 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2922 }
2923 #endif
2924
2925 Handle java_lang_reflect_Field::create(TRAPS) {
2926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2927 Symbol* name = vmSymbols::java_lang_reflect_Field();
2928 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2929 InstanceKlass* ik = InstanceKlass::cast(k);
2930 // Ensure it is initialized
2931 ik->initialize(CHECK_NH);
2932 return ik->allocate_instance_handle(THREAD);
2933 }
2934
2935 oop java_lang_reflect_Field::clazz(oop reflect) {
2936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2937 return reflect->obj_field(clazz_offset);
2938 }
2939
2940 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2941 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2942 reflect->obj_field_put(clazz_offset, value);
2943 }
2944
2945 oop java_lang_reflect_Field::name(oop field) {
2946 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2947 return field->obj_field(name_offset);
2948 }
2949
2950 void java_lang_reflect_Field::set_name(oop field, oop value) {
2951 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2952 field->obj_field_put(name_offset, value);
2953 }
2954
2955 oop java_lang_reflect_Field::type(oop field) {
2956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2957 return field->obj_field(type_offset);
2958 }
2959
2960 void java_lang_reflect_Field::set_type(oop field, oop value) {
2961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2962 field->obj_field_put(type_offset, value);
2963 }
2964
2965 int java_lang_reflect_Field::slot(oop reflect) {
2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2967 return reflect->int_field(slot_offset);
2968 }
2969
2970 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2972 reflect->int_field_put(slot_offset, value);
2973 }
2974
2975 int java_lang_reflect_Field::modifiers(oop field) {
2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977 return field->int_field(modifiers_offset);
2978 }
2979
2980 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2982 field->int_field_put(modifiers_offset, value);
2983 }
2984
2985 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2987 field->obj_field_put(signature_offset, value);
2988 }
2989
2990 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992 field->obj_field_put(annotations_offset, value);
2993 }
2994
2995 #define CONSTANTPOOL_FIELDS_DO(macro) \
2996 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
2997
2998 void reflect_ConstantPool::compute_offsets() {
2999 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3000 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3001 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3002 }
3003
3004 #if INCLUDE_CDS
3005 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3006 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3007 }
3008 #endif
3009
3010 #define PARAMETER_FIELDS_DO(macro) \
3011 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3012 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3013 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3014 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3015
3016 void java_lang_reflect_Parameter::compute_offsets() {
3017 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3018 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3019 }
3020
3021 #if INCLUDE_CDS
3022 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3023 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3024 }
3025 #endif
3026
3027 Handle java_lang_reflect_Parameter::create(TRAPS) {
3028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3029 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3030 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3031 InstanceKlass* ik = InstanceKlass::cast(k);
3032 // Ensure it is initialized
3033 ik->initialize(CHECK_NH);
3034 return ik->allocate_instance_handle(THREAD);
3035 }
3036
3037 oop java_lang_reflect_Parameter::name(oop param) {
3038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3039 return param->obj_field(name_offset);
3040 }
3041
3042 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3044 param->obj_field_put(name_offset, value);
3045 }
3046
3047 int java_lang_reflect_Parameter::modifiers(oop param) {
3048 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3049 return param->int_field(modifiers_offset);
3050 }
3051
3052 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3054 param->int_field_put(modifiers_offset, value);
3055 }
3056
3057 int java_lang_reflect_Parameter::index(oop param) {
3058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3059 return param->int_field(index_offset);
3060 }
3061
3062 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3064 param->int_field_put(index_offset, value);
3065 }
3066
3067 oop java_lang_reflect_Parameter::executable(oop param) {
3068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3069 return param->obj_field(executable_offset);
3070 }
3071
3072 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3074 param->obj_field_put(executable_offset, value);
3075 }
3076
3077
3078 int java_lang_Module::loader_offset;
3079 int java_lang_Module::name_offset;
3080 int java_lang_Module::_module_entry_offset = -1;
3081
3082 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3084 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3085 vmSymbols::java_lang_module_init_signature(),
3086 loader, module_name, CHECK_NH);
3087 }
3088
3089 #define MODULE_FIELDS_DO(macro) \
3090 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3091 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3092
3093 void java_lang_Module::compute_offsets() {
3094 InstanceKlass* k = SystemDictionary::Module_klass();
3095 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3096 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3097 }
3098
3099 #if INCLUDE_CDS
3100 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3101 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3102 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3103 }
3104 #endif
3105
3106 oop java_lang_Module::loader(oop module) {
3107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3108 return module->obj_field(loader_offset);
3109 }
3110
3111 void java_lang_Module::set_loader(oop module, oop value) {
3112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3113 module->obj_field_put(loader_offset, value);
3114 }
3115
3116 oop java_lang_Module::name(oop module) {
3117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3118 return module->obj_field(name_offset);
3119 }
3120
3121 void java_lang_Module::set_name(oop module, oop value) {
3122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3123 module->obj_field_put(name_offset, value);
3124 }
3125
3126 ModuleEntry* java_lang_Module::module_entry(oop module) {
3127 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3128 assert(module != NULL, "module can't be null");
3129 assert(oopDesc::is_oop(module), "module must be oop");
3130
3131 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3132 if (module_entry == NULL) {
3133 // If the inject field containing the ModuleEntry* is null then return the
3134 // class loader's unnamed module.
3135 oop loader = java_lang_Module::loader(module);
3136 Handle h_loader = Handle(Thread::current(), loader);
3137 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3138 return loader_cld->unnamed_module();
3139 }
3140 return module_entry;
3141 }
3142
3143 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3144 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3145 assert(module != NULL, "module can't be null");
3146 assert(oopDesc::is_oop(module), "module must be oop");
3147 module->address_field_put(_module_entry_offset, (address)module_entry);
3148 }
3149
3150 Handle reflect_ConstantPool::create(TRAPS) {
3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3152 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3153 // Ensure it is initialized
3154 k->initialize(CHECK_NH);
3155 return k->allocate_instance_handle(THREAD);
3156 }
3157
3158
3159 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3160 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3161 oop mirror = value->pool_holder()->java_mirror();
3162 // Save the mirror to get back the constant pool.
3163 reflect->obj_field_put(_oop_offset, mirror);
3164 }
3165
3166 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3167 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3168
3169 oop mirror = reflect->obj_field(_oop_offset);
3170 Klass* k = java_lang_Class::as_Klass(mirror);
3171 assert(k->is_instance_klass(), "Must be");
3172
3173 // Get the constant pool back from the klass. Since class redefinition
3174 // merges the new constant pool into the old, this is essentially the
3175 // same constant pool as the original. If constant pool merging is
3176 // no longer done in the future, this will have to change to save
3177 // the original.
3178 return InstanceKlass::cast(k)->constants();
3179 }
3180
3181 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3182 macro(_base_offset, k, "base", object_signature, false)
3183
3184 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3185 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3186 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3187 }
3188
3189 #if INCLUDE_CDS
3190 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3191 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3192 }
3193 #endif
3194
3195 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3196 Klass* k = SystemDictionary::box_klass(type);
3197 if (k == NULL) return NULL;
3198 InstanceKlass* ik = InstanceKlass::cast(k);
3199 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3200 return ik->allocate_instance(THREAD);
3201 }
3202
3203
3204 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3205 oop box = initialize_and_allocate(type, CHECK_0);
3206 if (box == NULL) return NULL;
3207 switch (type) {
3208 case T_BOOLEAN:
3209 box->bool_field_put(value_offset, value->z);
3210 break;
3211 case T_CHAR:
3212 box->char_field_put(value_offset, value->c);
3213 break;
3214 case T_FLOAT:
3215 box->float_field_put(value_offset, value->f);
3216 break;
3217 case T_DOUBLE:
3218 box->double_field_put(long_value_offset, value->d);
3219 break;
3220 case T_BYTE:
3221 box->byte_field_put(value_offset, value->b);
3222 break;
3223 case T_SHORT:
3224 box->short_field_put(value_offset, value->s);
3225 break;
3226 case T_INT:
3227 box->int_field_put(value_offset, value->i);
3228 break;
3229 case T_LONG:
3230 box->long_field_put(long_value_offset, value->j);
3231 break;
3232 default:
3233 return NULL;
3234 }
3235 return box;
3236 }
3237
3238
3239 BasicType java_lang_boxing_object::basic_type(oop box) {
3240 if (box == NULL) return T_ILLEGAL;
3241 BasicType type = SystemDictionary::box_klass_type(box->klass());
3242 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3243 return T_ILLEGAL;
3244 return type;
3245 }
3246
3247
3248 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3249 BasicType type = SystemDictionary::box_klass_type(box->klass());
3250 switch (type) {
3251 case T_BOOLEAN:
3252 value->z = box->bool_field(value_offset);
3253 break;
3254 case T_CHAR:
3255 value->c = box->char_field(value_offset);
3256 break;
3257 case T_FLOAT:
3258 value->f = box->float_field(value_offset);
3259 break;
3260 case T_DOUBLE:
3261 value->d = box->double_field(long_value_offset);
3262 break;
3263 case T_BYTE:
3264 value->b = box->byte_field(value_offset);
3265 break;
3266 case T_SHORT:
3267 value->s = box->short_field(value_offset);
3268 break;
3269 case T_INT:
3270 value->i = box->int_field(value_offset);
3271 break;
3272 case T_LONG:
3273 value->j = box->long_field(long_value_offset);
3274 break;
3275 default:
3276 return T_ILLEGAL;
3277 } // end switch
3278 return type;
3279 }
3280
3281
3282 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3283 BasicType type = SystemDictionary::box_klass_type(box->klass());
3284 switch (type) {
3285 case T_BOOLEAN:
3286 box->bool_field_put(value_offset, value->z);
3287 break;
3288 case T_CHAR:
3289 box->char_field_put(value_offset, value->c);
3290 break;
3291 case T_FLOAT:
3292 box->float_field_put(value_offset, value->f);
3293 break;
3294 case T_DOUBLE:
3295 box->double_field_put(long_value_offset, value->d);
3296 break;
3297 case T_BYTE:
3298 box->byte_field_put(value_offset, value->b);
3299 break;
3300 case T_SHORT:
3301 box->short_field_put(value_offset, value->s);
3302 break;
3303 case T_INT:
3304 box->int_field_put(value_offset, value->i);
3305 break;
3306 case T_LONG:
3307 box->long_field_put(long_value_offset, value->j);
3308 break;
3309 default:
3310 return T_ILLEGAL;
3311 } // end switch
3312 return type;
3313 }
3314
3315
3316 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3317 switch (type) {
3318 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3319 case T_CHAR: st->print("%d", value->c); break;
3320 case T_BYTE: st->print("%d", value->b); break;
3321 case T_SHORT: st->print("%d", value->s); break;
3322 case T_INT: st->print("%d", value->i); break;
3323 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3324 case T_FLOAT: st->print("%f", value->f); break;
3325 case T_DOUBLE: st->print("%lf", value->d); break;
3326 default: st->print("type %d?", type); break;
3327 }
3328 }
3329
3330 // Support for java_lang_ref_Reference
3331
3332 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3333 assert(obj != NULL, "sanity");
3334 if (offset != java_lang_ref_Reference::referent_offset) {
3335 return false;
3336 }
3337
3338 Klass* k = obj->klass();
3339 if (!k->is_instance_klass()) {
3340 return false;
3341 }
3342
3343 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3344 bool is_reference = ik->reference_type() != REF_NONE;
3345 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3346 return is_reference;
3347 }
3348
3349 // Support for java_lang_ref_SoftReference
3350 //
3351
3352 #define SOFTREFERENCE_FIELDS_DO(macro) \
3353 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3354 macro(static_clock_offset, k, "clock", long_signature, true)
3355
3356 void java_lang_ref_SoftReference::compute_offsets() {
3357 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3358 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3359 }
3360
3361 #if INCLUDE_CDS
3362 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3363 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3364 }
3365 #endif
3366
3367 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3368 return ref->long_field(timestamp_offset);
3369 }
3370
3371 jlong java_lang_ref_SoftReference::clock() {
3372 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3373 oop base = ik->static_field_base_raw();
3374 return base->long_field(static_clock_offset);
3375 }
3376
3377 void java_lang_ref_SoftReference::set_clock(jlong value) {
3378 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3379 oop base = ik->static_field_base_raw();
3380 base->long_field_put(static_clock_offset, value);
3381 }
3382
3383 // Support for java_lang_invoke_DirectMethodHandle
3384
3385 int java_lang_invoke_DirectMethodHandle::_member_offset;
3386
3387 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3388 oop member_name = NULL;
3389 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3390 "a DirectMethodHandle oop is expected");
3391 return dmh->obj_field(member_offset_in_bytes());
3392 }
3393
3394 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3395 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3396
3397 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3398 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3399 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3400 }
3401
3402 #if INCLUDE_CDS
3403 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3404 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3405 }
3406 #endif
3407
3408 // Support for java_lang_invoke_MethodHandle
3409
3410 int java_lang_invoke_MethodHandle::_type_offset;
3411 int java_lang_invoke_MethodHandle::_form_offset;
3412
3413 int java_lang_invoke_MemberName::_clazz_offset;
3414 int java_lang_invoke_MemberName::_name_offset;
3415 int java_lang_invoke_MemberName::_type_offset;
3416 int java_lang_invoke_MemberName::_flags_offset;
3417 int java_lang_invoke_MemberName::_method_offset;
3418 int java_lang_invoke_MemberName::_vmindex_offset;
3419
3420 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3421 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3422
3423 int java_lang_invoke_LambdaForm::_vmentry_offset;
3424
3425 #define METHODHANDLE_FIELDS_DO(macro) \
3426 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3427 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3428
3429 void java_lang_invoke_MethodHandle::compute_offsets() {
3430 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3431 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3432 }
3433
3434 #if INCLUDE_CDS
3435 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3436 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3437 }
3438 #endif
3439
3440 #define MEMBERNAME_FIELDS_DO(macro) \
3441 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3442 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3443 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3444 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3445 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3446
3447 void java_lang_invoke_MemberName::compute_offsets() {
3448 InstanceKlass* k = SystemDictionary::MemberName_klass();
3449 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3450 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3451 }
3452
3453 #if INCLUDE_CDS
3454 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3455 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3456 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3457 }
3458 #endif
3459
3460 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3461 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3462 assert(k != NULL, "jdk mismatch");
3463 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3464 }
3465
3466 #if INCLUDE_CDS
3467 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3468 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3469 }
3470 #endif
3471
3472 #define LAMBDAFORM_FIELDS_DO(macro) \
3473 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3474
3475 void java_lang_invoke_LambdaForm::compute_offsets() {
3476 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3477 assert (k != NULL, "jdk mismatch");
3478 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3479 }
3480
3481 #if INCLUDE_CDS
3482 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3483 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3484 }
3485 #endif
3486
3487 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3488 return obj != NULL && is_subclass(obj->klass());
3489 }
3490
3491
3492 oop java_lang_invoke_MethodHandle::type(oop mh) {
3493 return mh->obj_field(_type_offset);
3494 }
3495
3496 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3497 mh->obj_field_put(_type_offset, mtype);
3498 }
3499
3500 oop java_lang_invoke_MethodHandle::form(oop mh) {
3501 assert(_form_offset != 0, "");
3502 return mh->obj_field(_form_offset);
3503 }
3504
3505 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3506 assert(_form_offset != 0, "");
3507 mh->obj_field_put(_form_offset, lform);
3508 }
3509
3510 /// MemberName accessors
3511
3512 oop java_lang_invoke_MemberName::clazz(oop mname) {
3513 assert(is_instance(mname), "wrong type");
3514 return mname->obj_field(_clazz_offset);
3515 }
3516
3517 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3518 assert(is_instance(mname), "wrong type");
3519 mname->obj_field_put(_clazz_offset, clazz);
3520 }
3521
3522 oop java_lang_invoke_MemberName::name(oop mname) {
3523 assert(is_instance(mname), "wrong type");
3524 return mname->obj_field(_name_offset);
3525 }
3526
3527 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3528 assert(is_instance(mname), "wrong type");
3529 mname->obj_field_put(_name_offset, name);
3530 }
3531
3532 oop java_lang_invoke_MemberName::type(oop mname) {
3533 assert(is_instance(mname), "wrong type");
3534 return mname->obj_field(_type_offset);
3535 }
3536
3537 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3538 assert(is_instance(mname), "wrong type");
3539 mname->obj_field_put(_type_offset, type);
3540 }
3541
3542 int java_lang_invoke_MemberName::flags(oop mname) {
3543 assert(is_instance(mname), "wrong type");
3544 return mname->int_field(_flags_offset);
3545 }
3546
3547 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3548 assert(is_instance(mname), "wrong type");
3549 mname->int_field_put(_flags_offset, flags);
3550 }
3551
3552
3553 // Return vmtarget from ResolvedMethodName method field through indirection
3554 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3555 assert(is_instance(mname), "wrong type");
3556 oop method = mname->obj_field(_method_offset);
3557 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3558 }
3559
3560 bool java_lang_invoke_MemberName::is_method(oop mname) {
3561 assert(is_instance(mname), "must be MemberName");
3562 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3563 }
3564
3565 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3566 assert(is_instance(mname), "wrong type");
3567 mname->obj_field_put(_method_offset, resolved_method);
3568 }
3569
3570 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3571 assert(is_instance(mname), "wrong type");
3572 return (intptr_t) mname->address_field(_vmindex_offset);
3573 }
3574
3575 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3576 assert(is_instance(mname), "wrong type");
3577 mname->address_field_put(_vmindex_offset, (address) index);
3578 }
3579
3580
3581 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3582 assert(is_instance(resolved_method), "wrong type");
3583 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3584 assert(m->is_method(), "must be");
3585 return m;
3586 }
3587
3588 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3589 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3590 assert(is_instance(resolved_method), "wrong type");
3591 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3592 }
3593
3594 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3595 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3596 oop resolved_method = ResolvedMethodTable::find_method(m());
3597 if (resolved_method == NULL) {
3598 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3599 if (!k->is_initialized()) {
3600 k->initialize(CHECK_NULL);
3601 }
3602 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3603 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3604 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3605 // distinct loaders) to ensure the metadata is kept alive.
3606 // This mirror may be different than the one in clazz field.
3607 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3608 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3609 }
3610 return resolved_method;
3611 }
3612
3613 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3614 assert(is_instance(lform), "wrong type");
3615 return lform->obj_field(_vmentry_offset);
3616 }
3617
3618
3619 // Support for java_lang_invoke_MethodType
3620
3621 int java_lang_invoke_MethodType::_rtype_offset;
3622 int java_lang_invoke_MethodType::_ptypes_offset;
3623
3624 #define METHODTYPE_FIELDS_DO(macro) \
3625 macro(_rtype_offset, k, "rtype", class_signature, false); \
3626 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3627
3628 void java_lang_invoke_MethodType::compute_offsets() {
3629 InstanceKlass* k = SystemDictionary::MethodType_klass();
3630 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3631 }
3632
3633 #if INCLUDE_CDS
3634 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3635 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3636 }
3637 #endif
3638
3639 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3640 st->print("(");
3641 objArrayOop pts = ptypes(mt);
3642 for (int i = 0, limit = pts->length(); i < limit; i++) {
3643 java_lang_Class::print_signature(pts->obj_at(i), st);
3644 }
3645 st->print(")");
3646 java_lang_Class::print_signature(rtype(mt), st);
3647 }
3648
3649 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3650 ResourceMark rm;
3651 stringStream buffer(128);
3652 print_signature(mt, &buffer);
3653 const char* sigstr = buffer.base();
3654 int siglen = (int) buffer.size();
3655 Symbol *name;
3656 if (!intern_if_not_found) {
3657 name = SymbolTable::probe(sigstr, siglen);
3658 } else {
3659 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3660 }
3661 return name;
3662 }
3663
3664 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3665 if (oopDesc::equals(mt1, mt2))
3666 return true;
3667 if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3668 return false;
3669 if (ptype_count(mt1) != ptype_count(mt2))
3670 return false;
3671 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3672 if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3673 return false;
3674 }
3675 return true;
3676 }
3677
3678 oop java_lang_invoke_MethodType::rtype(oop mt) {
3679 assert(is_instance(mt), "must be a MethodType");
3680 return mt->obj_field(_rtype_offset);
3681 }
3682
3683 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3684 assert(is_instance(mt), "must be a MethodType");
3685 return (objArrayOop) mt->obj_field(_ptypes_offset);
3686 }
3687
3688 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3689 return ptypes(mt)->obj_at(idx);
3690 }
3691
3692 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3693 return ptypes(mt)->length();
3694 }
3695
3696 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3697 objArrayOop pts = ptypes(mt);
3698 int count = pts->length();
3699 int slots = 0;
3700 for (int i = 0; i < count; i++) {
3701 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3702 slots += type2size[bt];
3703 }
3704 return slots;
3705 }
3706
3707 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3708 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3709 return type2size[bt];
3710 }
3711
3712
3713 // Support for java_lang_invoke_CallSite
3714
3715 int java_lang_invoke_CallSite::_target_offset;
3716 int java_lang_invoke_CallSite::_context_offset;
3717
3718 #define CALLSITE_FIELDS_DO(macro) \
3719 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3720 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3721
3722 void java_lang_invoke_CallSite::compute_offsets() {
3723 InstanceKlass* k = SystemDictionary::CallSite_klass();
3724 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3725 }
3726
3727 #if INCLUDE_CDS
3728 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3729 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3730 }
3731 #endif
3732
3733 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3734 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3735
3736 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3737 return dep_oop;
3738 }
3739
3740 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3741
3742 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3743 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3744
3745 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3746 InstanceKlass* k = SystemDictionary::Context_klass();
3747 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3748 }
3749
3750 #if INCLUDE_CDS
3751 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3752 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3753 }
3754 #endif
3755
3756 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3757 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3758 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3759 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3760 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3761 return dep_ctx;
3762 }
3763
3764 // Support for java_security_AccessControlContext
3765
3766 int java_security_AccessControlContext::_context_offset = 0;
3767 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3768 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3769 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3770
3771 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3772 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3773 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3774 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3775 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3776
3777 void java_security_AccessControlContext::compute_offsets() {
3778 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3779 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3780 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3781 }
3782
3783 #if INCLUDE_CDS
3784 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3785 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3786 }
3787 #endif
3788
3789 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3790 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3791 // Ensure klass is initialized
3792 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3793 // Allocate result
3794 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3795 // Fill in values
3796 result->obj_field_put(_context_offset, context());
3797 result->obj_field_put(_privilegedContext_offset, privileged_context());
3798 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3799 // whitelist AccessControlContexts created by the JVM if present
3800 if (_isAuthorized_offset != -1) {
3801 result->bool_field_put(_isAuthorized_offset, true);
3802 }
3803 return result;
3804 }
3805
3806
3807 // Support for java_lang_ClassLoader
3808
3809 bool java_lang_ClassLoader::offsets_computed = false;
3810 int java_lang_ClassLoader::_loader_data_offset = -1;
3811 int java_lang_ClassLoader::parallelCapable_offset = -1;
3812 int java_lang_ClassLoader::name_offset = -1;
3813 int java_lang_ClassLoader::nameAndId_offset = -1;
3814 int java_lang_ClassLoader::unnamedModule_offset = -1;
3815
3816 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3817 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3818 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3819 }
3820
3821 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3822 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3823 return RawAccess<>::load_at(loader, _loader_data_offset);
3824 }
3825
3826 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3827 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3828 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3829 }
3830
3831 #define CLASSLOADER_FIELDS_DO(macro) \
3832 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3833 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3834 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3835 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3836 macro(parent_offset, k1, "parent", classloader_signature, false)
3837
3838 void java_lang_ClassLoader::compute_offsets() {
3839 assert(!offsets_computed, "offsets should be initialized only once");
3840 offsets_computed = true;
3841
3842 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3843 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3844
3845 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3846 }
3847
3848 #if INCLUDE_CDS
3849 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3850 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3851 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3852 }
3853 #endif
3854
3855 oop java_lang_ClassLoader::parent(oop loader) {
3856 assert(is_instance(loader), "loader must be oop");
3857 return loader->obj_field(parent_offset);
3858 }
3859
3860 // Returns the name field of this class loader. If the name field has not
3861 // been set, null will be returned.
3862 oop java_lang_ClassLoader::name(oop loader) {
3863 assert(is_instance(loader), "loader must be oop");
3864 return loader->obj_field(name_offset);
3865 }
3866
3867 // Returns the nameAndId field of this class loader. The format is
3868 // as follows:
3869 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3870 // If the defining loader has no name then <qualified-class-name> @<id>
3871 // If built-in loader, then omit '@<id>' as there is only one instance.
3872 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3873 oop java_lang_ClassLoader::nameAndId(oop loader) {
3874 assert(is_instance(loader), "loader must be oop");
3875 return loader->obj_field(nameAndId_offset);
3876 }
3877
3878 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3879 assert(is_instance(loader), "loader must be oop");
3880 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3881 oop acl = loader;
3882 debug_only(jint loop_count = 0);
3883 // This loop taken verbatim from ClassLoader.java:
3884 do {
3885 acl = parent(acl);
3886 if (oopDesc::equals(cl, acl)) {
3887 return true;
3888 }
3889 assert(++loop_count > 0, "loop_count overflow");
3890 } while (acl != NULL);
3891 return false;
3892 }
3893
3894 bool java_lang_ClassLoader::is_instance(oop obj) {
3895 return obj != NULL && is_subclass(obj->klass());
3896 }
3897
3898
3899 // For class loader classes, parallelCapable defined
3900 // based on non-null field
3901 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3902 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3903 if (parallelCapable_offset == -1) {
3904 // Default for backward compatibility is false
3905 return false;
3906 }
3907 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3908 }
3909
3910 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3911 // Fix for 4474172; see evaluation for more details
3912 loader = non_reflection_class_loader(loader);
3913
3914 oop cl = SystemDictionary::java_system_loader();
3915 while(cl != NULL) {
3916 if (oopDesc::equals(cl, loader)) return true;
3917 cl = parent(cl);
3918 }
3919 return false;
3920 }
3921
3922 // Return true if this is one of the class loaders associated with
3923 // the generated bytecodes for reflection.
3924 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3925 if (loader != NULL) {
3926 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3927 // This might be null in non-1.4 JDKs
3928 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3929 }
3930 return false;
3931 }
3932
3933 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3934 // See whether this is one of the class loaders associated with
3935 // the generated bytecodes for reflection, and if so, "magically"
3936 // delegate to its parent to prevent class loading from occurring
3937 // in places where applications using reflection didn't expect it.
3938 if (is_reflection_class_loader(loader)) {
3939 return parent(loader);
3940 }
3941 return loader;
3942 }
3943
3944 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3945 assert(is_instance(loader), "loader must be oop");
3946 return loader->obj_field(unnamedModule_offset);
3947 }
3948
3949 // Support for java_lang_System
3950 //
3951 #define SYSTEM_FIELDS_DO(macro) \
3952 macro(static_in_offset, k, "in", input_stream_signature, true); \
3953 macro(static_out_offset, k, "out", print_stream_signature, true); \
3954 macro(static_err_offset, k, "err", print_stream_signature, true); \
3955 macro(static_security_offset, k, "security", security_manager_signature, true)
3956
3957 void java_lang_System::compute_offsets() {
3958 InstanceKlass* k = SystemDictionary::System_klass();
3959 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3960 }
3961
3962 #if INCLUDE_CDS
3963 void java_lang_System::serialize_offsets(SerializeClosure* f) {
3964 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3965 }
3966 #endif
3967
3968 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3969 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
3970 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
3971
3972 int java_lang_Class::_klass_offset;
3973 int java_lang_Class::_array_klass_offset;
3974 int java_lang_Class::_oop_size_offset;
3975 int java_lang_Class::_static_oop_field_count_offset;
3976 int java_lang_Class::_class_loader_offset;
3977 int java_lang_Class::_module_offset;
3978 int java_lang_Class::_protection_domain_offset;
3979 int java_lang_Class::_component_mirror_offset;
3980 int java_lang_Class::_init_lock_offset;
3981 int java_lang_Class::_signers_offset;
3982 int java_lang_Class::_name_offset;
3983 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3984 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3985 int java_lang_Throwable::backtrace_offset;
3986 int java_lang_Throwable::detailMessage_offset;
3987 int java_lang_Throwable::stackTrace_offset;
3988 int java_lang_Throwable::depth_offset;
3989 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3990 int java_lang_reflect_AccessibleObject::override_offset;
3991 int java_lang_reflect_Method::clazz_offset;
3992 int java_lang_reflect_Method::name_offset;
3993 int java_lang_reflect_Method::returnType_offset;
3994 int java_lang_reflect_Method::parameterTypes_offset;
3995 int java_lang_reflect_Method::exceptionTypes_offset;
3996 int java_lang_reflect_Method::slot_offset;
3997 int java_lang_reflect_Method::modifiers_offset;
3998 int java_lang_reflect_Method::signature_offset;
3999 int java_lang_reflect_Method::annotations_offset;
4000 int java_lang_reflect_Method::parameter_annotations_offset;
4001 int java_lang_reflect_Method::annotation_default_offset;
4002 int java_lang_reflect_Constructor::clazz_offset;
4003 int java_lang_reflect_Constructor::parameterTypes_offset;
4004 int java_lang_reflect_Constructor::exceptionTypes_offset;
4005 int java_lang_reflect_Constructor::slot_offset;
4006 int java_lang_reflect_Constructor::modifiers_offset;
4007 int java_lang_reflect_Constructor::signature_offset;
4008 int java_lang_reflect_Constructor::annotations_offset;
4009 int java_lang_reflect_Constructor::parameter_annotations_offset;
4010 int java_lang_reflect_Field::clazz_offset;
4011 int java_lang_reflect_Field::name_offset;
4012 int java_lang_reflect_Field::type_offset;
4013 int java_lang_reflect_Field::slot_offset;
4014 int java_lang_reflect_Field::modifiers_offset;
4015 int java_lang_reflect_Field::signature_offset;
4016 int java_lang_reflect_Field::annotations_offset;
4017 int java_lang_reflect_Parameter::name_offset;
4018 int java_lang_reflect_Parameter::modifiers_offset;
4019 int java_lang_reflect_Parameter::index_offset;
4020 int java_lang_reflect_Parameter::executable_offset;
4021 int java_lang_boxing_object::value_offset;
4022 int java_lang_boxing_object::long_value_offset;
4023 int java_lang_ref_Reference::referent_offset;
4024 int java_lang_ref_Reference::queue_offset;
4025 int java_lang_ref_Reference::next_offset;
4026 int java_lang_ref_Reference::discovered_offset;
4027 int java_lang_ref_SoftReference::timestamp_offset;
4028 int java_lang_ref_SoftReference::static_clock_offset;
4029 int java_lang_ClassLoader::parent_offset;
4030 int java_lang_System::static_in_offset;
4031 int java_lang_System::static_out_offset;
4032 int java_lang_System::static_err_offset;
4033 int java_lang_System::static_security_offset;
4034 int java_lang_StackTraceElement::methodName_offset;
4035 int java_lang_StackTraceElement::fileName_offset;
4036 int java_lang_StackTraceElement::lineNumber_offset;
4037 int java_lang_StackTraceElement::moduleName_offset;
4038 int java_lang_StackTraceElement::moduleVersion_offset;
4039 int java_lang_StackTraceElement::classLoaderName_offset;
4040 int java_lang_StackTraceElement::declaringClass_offset;
4041 int java_lang_StackTraceElement::declaringClassObject_offset;
4042 int java_lang_StackFrameInfo::_memberName_offset;
4043 int java_lang_StackFrameInfo::_bci_offset;
4044 int java_lang_StackFrameInfo::_version_offset;
4045 int java_lang_LiveStackFrameInfo::_monitors_offset;
4046 int java_lang_LiveStackFrameInfo::_locals_offset;
4047 int java_lang_LiveStackFrameInfo::_operands_offset;
4048 int java_lang_LiveStackFrameInfo::_mode_offset;
4049 int java_lang_AssertionStatusDirectives::classes_offset;
4050 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4051 int java_lang_AssertionStatusDirectives::packages_offset;
4052 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4053 int java_lang_AssertionStatusDirectives::deflt_offset;
4054 int java_nio_Buffer::_limit_offset;
4055 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4056 int reflect_ConstantPool::_oop_offset;
4057 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4058
4059
4060 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4061 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4062 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4063 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4064 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4065 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4066 macro(methodName_offset, k, "methodName", string_signature, false); \
4067 macro(fileName_offset, k, "fileName", string_signature, false); \
4068 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4069
4070 // Support for java_lang_StackTraceElement
4071 void java_lang_StackTraceElement::compute_offsets() {
4072 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4073 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4074 }
4075
4076 #if INCLUDE_CDS
4077 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4078 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4079 }
4080 #endif
4081
4082 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4083 element->obj_field_put(fileName_offset, value);
4084 }
4085
4086 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4087 element->obj_field_put(declaringClass_offset, value);
4088 }
4089
4090 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4091 element->obj_field_put(methodName_offset, value);
4092 }
4093
4094 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4095 element->int_field_put(lineNumber_offset, value);
4096 }
4097
4098 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4099 element->obj_field_put(moduleName_offset, value);
4100 }
4101
4102 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4103 element->obj_field_put(moduleVersion_offset, value);
4104 }
4105
4106 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4107 element->obj_field_put(classLoaderName_offset, value);
4108 }
4109
4110 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4111 element->obj_field_put(declaringClassObject_offset, value);
4112 }
4113
4114 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4115 element->short_field_put(_version_offset, value);
4116 }
4117
4118 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4119 element->int_field_put(_bci_offset, value);
4120 }
4121
4122 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4123 element->obj_field_put(_monitors_offset, value);
4124 }
4125
4126 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4127 element->obj_field_put(_locals_offset, value);
4128 }
4129
4130 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4131 element->obj_field_put(_operands_offset, value);
4132 }
4133
4134 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4135 element->int_field_put(_mode_offset, value);
4136 }
4137
4138 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4139 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4140 macro(classes_offset, k, "classes", string_array_signature, false); \
4141 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4142 macro(packages_offset, k, "packages", string_array_signature, false); \
4143 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4144 macro(deflt_offset, k, "deflt", bool_signature, false)
4145
4146 void java_lang_AssertionStatusDirectives::compute_offsets() {
4147 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4148 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4149 }
4150
4151 #if INCLUDE_CDS
4152 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4153 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4154 }
4155 #endif
4156
4157 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4158 o->obj_field_put(classes_offset, val);
4159 }
4160
4161 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4162 o->obj_field_put(classEnabled_offset, val);
4163 }
4164
4165 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4166 o->obj_field_put(packages_offset, val);
4167 }
4168
4169 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4170 o->obj_field_put(packageEnabled_offset, val);
4171 }
4172
4173 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4174 o->bool_field_put(deflt_offset, val);
4175 }
4176
4177
4178 // Support for intrinsification of java.nio.Buffer.checkIndex
4179 int java_nio_Buffer::limit_offset() {
4180 return _limit_offset;
4181 }
4182
4183 #define BUFFER_FIELDS_DO(macro) \
4184 macro(_limit_offset, k, "limit", int_signature, false)
4185
4186 void java_nio_Buffer::compute_offsets() {
4187 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4188 assert(k != NULL, "must be loaded in 1.4+");
4189 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4190 }
4191
4192 #if INCLUDE_CDS
4193 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4194 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4195 }
4196 #endif
4197
4198 #define AOS_FIELDS_DO(macro) \
4199 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4200
4201 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4202 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4203 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4204 }
4205
4206 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4207 assert(_owner_offset != 0, "Must be initialized");
4208 return obj->obj_field(_owner_offset);
4209 }
4210
4211 #if INCLUDE_CDS
4212 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4213 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4214 }
4215 #endif
4216
4217 static int member_offset(int hardcoded_offset) {
4218 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4219 }
4220
4221 // Compute hard-coded offsets
4222 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4223 // are not available to determine the offset_of_static_fields.
4224 void JavaClasses::compute_hard_coded_offsets() {
4225
4226 // java_lang_boxing_object
4227 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4228 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4229
4230 // java_lang_ref_Reference
4231 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4232 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4233 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4234 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4235 }
4236
4237 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4238
4239 // Compute non-hard-coded field offsets of all the classes in this file
4240 void JavaClasses::compute_offsets() {
4241 if (UseSharedSpaces) {
4242 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4243 JvmtiExport::has_early_class_hook_env()),
4244 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4245 // None of the classes used by the rest of this function can be replaced by
4246 // JMVTI ClassFileLoadHook.
4247 // We are safe to use the archived offsets, which have already been restored
4248 // by JavaClasses::serialize_offsets, without computing the offsets again.
4249 return;
4250 }
4251
4252 // We have already called the compute_offsets() of the
4253 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4254 // earlier inside SystemDictionary::resolve_well_known_classes()
4255 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4256
4257 // generated interpreter code wants to know about the offsets we just computed:
4258 AbstractAssembler::update_delayed_values();
4259 }
4260
4261 #if INCLUDE_CDS
4262 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4263
4264 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4265 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4266 }
4267 #endif
4268
4269
4270 #ifndef PRODUCT
4271
4272 // These functions exist to assert the validity of hard-coded field offsets to guard
4273 // against changes in the class files
4274
4275 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4276 EXCEPTION_MARK;
4277 fieldDescriptor fd;
4278 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4279 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4280 InstanceKlass* ik = InstanceKlass::cast(k);
4281 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4282 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4283 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4284 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4285 return false;
4286 }
4287 if (fd.is_static()) {
4288 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4289 return false;
4290 }
4291 if (fd.offset() == hardcoded_offset ) {
4292 return true;
4293 } else {
4294 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4295 klass_name, field_name, hardcoded_offset, fd.offset());
4296 return false;
4297 }
4298 }
4299
4300 // Check the hard-coded field offsets of all the classes in this file
4301
4302 void JavaClasses::check_offsets() {
4303 bool valid = true;
4304
4305 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4306 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4307
4308 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4309 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4310
4311 // Boxed primitive objects (java_lang_boxing_object)
4312
4313 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4314 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4315 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4316 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4317 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4318 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4319 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4320 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4321
4322 // java.lang.ref.Reference
4323
4324 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4325 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4326 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4327 // Fake field
4328 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4329
4330 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4331 }
4332
4333 #endif // PRODUCT
4334
4335 int InjectedField::compute_offset() {
4336 InstanceKlass* ik = InstanceKlass::cast(klass());
4337 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4338 if (!may_be_java && !fs.access_flags().is_internal()) {
4339 // Only look at injected fields
4340 continue;
4341 }
4342 if (fs.name() == name() && fs.signature() == signature()) {
4343 return fs.offset();
4344 }
4345 }
4346 ResourceMark rm;
4347 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)" : "");
4348 #ifndef PRODUCT
4349 ik->print();
4350 tty->print_cr("all fields:");
4351 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4352 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4353 }
4354 #endif //PRODUCT
4355 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4356 return -1;
4357 }
4358
4359 void javaClasses_init() {
4360 JavaClasses::compute_offsets();
4361 JavaClasses::check_offsets();
4362 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4363 }