1 /*
2 * Copyright (c) 1997, 2018, 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/oopFactory.hpp"
40 #include "memory/metaspaceShared.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.hpp"
43 #include "oops/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceMirrorKlass.hpp"
46 #include "oops/klass.hpp"
47 #include "oops/method.inline.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "oops/symbol.hpp"
51 #include "oops/typeArrayOop.inline.hpp"
52 #include "prims/resolvedMethodTable.hpp"
53 #include "runtime/fieldDescriptor.inline.hpp"
54 #include "runtime/frame.inline.hpp"
55 #include "runtime/handles.inline.hpp"
56 #include "runtime/interfaceSupport.inline.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/javaCalls.hpp"
59 #include "runtime/jniHandles.inline.hpp"
60 #include "runtime/safepoint.hpp"
61 #include "runtime/safepointVerifiers.hpp"
62 #include "runtime/thread.inline.hpp"
63 #include "runtime/vframe.inline.hpp"
64 #include "utilities/align.hpp"
65 #include "utilities/preserveException.hpp"
66 #if INCLUDE_JVMCI
67 #include "jvmci/jvmciJavaClasses.hpp"
68 #endif
69
70 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
71 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
72
73 #if INCLUDE_CDS
74 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
75 f->do_u4((u4*)&_##name##_offset);
76 #endif
77
78 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
79 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
80
81 InjectedField JavaClasses::_injected_fields[] = {
82 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
83 };
84
85 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
86 return _injected_fields[id].compute_offset();
87 }
88
89 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
90 *field_count = 0;
91
92 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
93 if (sid == vmSymbols::NO_SID) {
94 // Only well known classes can inject fields
95 return NULL;
96 }
97
98 int count = 0;
99 int start = -1;
100
101 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
102 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
103 count++; \
104 if (start == -1) start = klass##_##name##_enum; \
105 }
106 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
107 #undef LOOKUP_INJECTED_FIELD
108
109 if (start != -1) {
110 *field_count = count;
111 return _injected_fields + start;
112 }
113 return NULL;
114 }
115
116
117 // Helpful routine for computing field offsets at run time rather than hardcoding them
118 // Finds local fields only, including static fields. Static field offsets are from the
119 // beginning of the mirror.
120 static void compute_offset(int &dest_offset,
121 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
122 bool is_static = false) {
123 fieldDescriptor fd;
124 if (ik == NULL) {
125 ResourceMark rm;
126 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
127 vm_exit_during_initialization("Invalid layout of preloaded class");
128 }
129
130 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
131 ResourceMark rm;
132 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
133 name_symbol->as_C_string(), signature_symbol->as_C_string());
134 #ifndef PRODUCT
135 // Prints all fields and offsets
136 Log(class) lt;
137 LogStream ls(lt.error());
138 ik->print_on(&ls);
139 #endif //PRODUCT
140 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
141 }
142 dest_offset = fd.offset();
143 }
144
145 // Overloading to pass name as a string.
146 static void compute_offset(int& dest_offset, InstanceKlass* ik,
147 const char* name_string, Symbol* signature_symbol,
148 bool is_static = false) {
149 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
150 if (name == NULL) {
151 ResourceMark rm;
152 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
153 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name());
154 }
155 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
156 }
157
158 int java_lang_String::value_offset = 0;
159 int java_lang_String::hash_offset = 0;
160 int java_lang_String::coder_offset = 0;
161
162 bool java_lang_String::initialized = false;
163
164 bool java_lang_String::is_instance(oop obj) {
165 return is_instance_inlined(obj);
166 }
167
168 #if INCLUDE_CDS
169 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
170 f->do_u4((u4*)&offset)
171 #endif
172
173 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
174 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
175
176 #define STRING_FIELDS_DO(macro) \
177 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
178 macro(hash_offset, k, "hash", int_signature, false); \
179 macro(coder_offset, k, "coder", byte_signature, false)
180
181 void java_lang_String::compute_offsets() {
182 if (initialized) {
183 return;
184 }
185
186 InstanceKlass* k = SystemDictionary::String_klass();
187 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
188
189 initialized = true;
190 }
191
192 #if INCLUDE_CDS
193 void java_lang_String::serialize_offsets(SerializeClosure* f) {
194 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
195 f->do_u4((u4*)&initialized);
196 }
197 #endif
198
199 class CompactStringsFixup : public FieldClosure {
200 private:
201 bool _value;
202
203 public:
204 CompactStringsFixup(bool value) : _value(value) {}
205
206 void do_field(fieldDescriptor* fd) {
207 if (fd->name() == vmSymbols::compact_strings_name()) {
208 oop mirror = fd->field_holder()->java_mirror();
209 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
210 assert(mirror != NULL, "String must have mirror already");
211 mirror->bool_field_put(fd->offset(), _value);
212 }
213 }
214 };
215
216 void java_lang_String::set_compact_strings(bool value) {
217 CompactStringsFixup fix(value);
218 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
219 }
220
221 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
222 assert(initialized, "Must be initialized");
223 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
224
225 // Create the String object first, so there's a chance that the String
226 // and the char array it points to end up in the same cache line.
227 oop obj;
228 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
229
230 // Create the char array. The String object must be handlized here
231 // because GC can happen as a result of the allocation attempt.
232 Handle h_obj(THREAD, obj);
233 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
234 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
235
236 // Point the String at the char array
237 obj = h_obj();
238 set_value(obj, buffer);
239 // No need to zero the offset, allocation zero'ed the entire String object
240 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
241 return h_obj;
242 }
243
244 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
245 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
246 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
247 typeArrayOop buffer = value(h_obj());
248 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
249 if (is_latin1) {
250 for (int index = 0; index < length; index++) {
251 buffer->byte_at_put(index, (jbyte)unicode[index]);
252 }
253 } else {
254 for (int index = 0; index < length; index++) {
255 buffer->char_at_put(index, unicode[index]);
256 }
257 }
258
259 #ifdef ASSERT
260 {
261 ResourceMark rm;
262 char* expected = UNICODE::as_utf8(unicode, length);
263 char* actual = as_utf8_string(h_obj());
264 if (strcmp(expected, actual) != 0) {
265 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
266 ShouldNotReachHere();
267 }
268 }
269 #endif
270
271 return h_obj;
272 }
273
274 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
275 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
276 return h_obj();
277 }
278
279 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
280 if (utf8_str == NULL) {
281 return Handle();
282 }
283 bool has_multibyte, is_latin1;
284 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
285 if (!CompactStrings) {
286 has_multibyte = true;
287 is_latin1 = false;
288 }
289
290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
291 if (length > 0) {
292 if (!has_multibyte) {
293 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
294 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
295 } else if (is_latin1) {
296 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
297 } else {
298 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
299 }
300 }
301
302 #ifdef ASSERT
303 // This check is too strict because the input string is not necessarily valid UTF8.
304 // For example, it may be created with arbitrary content via jni_NewStringUTF.
305 /*
306 {
307 ResourceMark rm;
308 const char* expected = utf8_str;
309 char* actual = as_utf8_string(h_obj());
310 if (strcmp(expected, actual) != 0) {
311 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
312 ShouldNotReachHere();
313 }
314 }
315 */
316 #endif
317
318 return h_obj;
319 }
320
321 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
322 Handle h_obj = create_from_str(utf8_str, CHECK_0);
323 return h_obj();
324 }
325
326 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
327 const char* utf8_str = (char*)symbol->bytes();
328 int utf8_len = symbol->utf8_length();
329
330 bool has_multibyte, is_latin1;
331 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
332 if (!CompactStrings) {
333 has_multibyte = true;
334 is_latin1 = false;
335 }
336
337 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
338 if (length > 0) {
339 if (!has_multibyte) {
340 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
341 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
342 } else if (is_latin1) {
343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
344 } else {
345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
346 }
347 }
348
349 #ifdef ASSERT
350 {
351 ResourceMark rm;
352 const char* expected = symbol->as_utf8();
353 char* actual = as_utf8_string(h_obj());
354 if (strncmp(expected, actual, utf8_len) != 0) {
355 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
356 ShouldNotReachHere();
357 }
358 }
359 #endif
360
361 return h_obj;
362 }
363
364 // Converts a C string to a Java String based on current encoding
365 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
366 assert(str != NULL, "bad arguments");
367
368 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
369 static to_java_string_fn_t _to_java_string_fn = NULL;
370
371 if (_to_java_string_fn == NULL) {
372 void *lib_handle = os::native_java_library();
373 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
374 if (_to_java_string_fn == NULL) {
375 fatal("NewStringPlatform missing");
376 }
377 }
378
379 jstring js = NULL;
380 { JavaThread* thread = (JavaThread*)THREAD;
381 assert(thread->is_Java_thread(), "must be java thread");
382 HandleMark hm(thread);
383 ThreadToNativeFromVM ttn(thread);
384 js = (_to_java_string_fn)(thread->jni_environment(), str);
385 }
386 return Handle(THREAD, JNIHandles::resolve(js));
387 }
388
389 // Converts a Java String to a native C string that can be used for
390 // native OS calls.
391 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
392 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
393 static to_platform_string_fn_t _to_platform_string_fn = NULL;
394
395 if (_to_platform_string_fn == NULL) {
396 void *lib_handle = os::native_java_library();
397 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
398 if (_to_platform_string_fn == NULL) {
399 fatal("GetStringPlatformChars missing");
400 }
401 }
402
403 char *native_platform_string;
404 { JavaThread* thread = (JavaThread*)THREAD;
405 assert(thread->is_Java_thread(), "must be java thread");
406 JNIEnv *env = thread->jni_environment();
407 jstring js = (jstring) JNIHandles::make_local(env, java_string());
408 bool is_copy;
409 HandleMark hm(thread);
410 ThreadToNativeFromVM ttn(thread);
411 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
412 assert(is_copy == JNI_TRUE, "is_copy value changed");
413 JNIHandles::destroy_local(js);
414 }
415 return native_platform_string;
416 }
417
418 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
419 oop obj = java_string();
420 // Typical usage is to convert all '/' to '.' in string.
421 typeArrayOop value = java_lang_String::value(obj);
422 int length = java_lang_String::length(obj);
423 bool is_latin1 = java_lang_String::is_latin1(obj);
424
425 // First check if any from_char exist
426 int index; // Declared outside, used later
427 for (index = 0; index < length; index++) {
428 jchar c = !is_latin1 ? value->char_at(index) :
429 ((jchar) value->byte_at(index)) & 0xff;
430 if (c == from_char) {
431 break;
432 }
433 }
434 if (index == length) {
435 // No from_char, so do not copy.
436 return java_string;
437 }
438
439 // Check if result string will be latin1
440 bool to_is_latin1 = false;
441
442 // Replacement char must be latin1
443 if (CompactStrings && UNICODE::is_latin1(to_char)) {
444 if (is_latin1) {
445 // Source string is latin1 as well
446 to_is_latin1 = true;
447 } else if (!UNICODE::is_latin1(from_char)) {
448 // We are replacing an UTF16 char. Scan string to
449 // check if result can be latin1 encoded.
450 to_is_latin1 = true;
451 for (index = 0; index < length; index++) {
452 jchar c = value->char_at(index);
453 if (c != from_char && !UNICODE::is_latin1(c)) {
454 to_is_latin1 = false;
455 break;
456 }
457 }
458 }
459 }
460
461 // Create new UNICODE (or byte) buffer. Must handlize value because GC
462 // may happen during String and char array creation.
463 typeArrayHandle h_value(THREAD, value);
464 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
465 typeArrayOop from_buffer = h_value();
466 typeArrayOop to_buffer = java_lang_String::value(string());
467
468 // Copy contents
469 for (index = 0; index < length; index++) {
470 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
471 ((jchar) from_buffer->byte_at(index)) & 0xff;
472 if (c == from_char) {
473 c = to_char;
474 }
475 if (!to_is_latin1) {
476 to_buffer->char_at_put(index, c);
477 } else {
478 to_buffer->byte_at_put(index, (jbyte) c);
479 }
480 }
481 return string;
482 }
483
484 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
485 typeArrayOop value = java_lang_String::value(java_string);
486 length = java_lang_String::length(java_string);
487 bool is_latin1 = java_lang_String::is_latin1(java_string);
488
489 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
490 if (result != NULL) {
491 if (!is_latin1) {
492 for (int index = 0; index < length; index++) {
493 result[index] = value->char_at(index);
494 }
495 } else {
496 for (int index = 0; index < length; index++) {
497 result[index] = ((jchar) value->byte_at(index)) & 0xff;
498 }
499 }
500 } else {
501 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
502 }
503 return result;
504 }
505
506 unsigned int java_lang_String::hash_code(oop java_string) {
507 int length = java_lang_String::length(java_string);
508 // Zero length string will hash to zero with String.hashCode() function.
509 if (length == 0) return 0;
510
511 typeArrayOop value = java_lang_String::value(java_string);
512 bool is_latin1 = java_lang_String::is_latin1(java_string);
513
514 if (is_latin1) {
515 return java_lang_String::hash_code(value->byte_at_addr(0), length);
516 } else {
517 return java_lang_String::hash_code(value->char_at_addr(0), length);
518 }
519 }
520
521 char* java_lang_String::as_quoted_ascii(oop java_string) {
522 typeArrayOop value = java_lang_String::value(java_string);
523 int length = java_lang_String::length(java_string);
524 bool is_latin1 = java_lang_String::is_latin1(java_string);
525
526 if (length == 0) return NULL;
527
528 char* result;
529 int result_length;
530 if (!is_latin1) {
531 jchar* base = value->char_at_addr(0);
532 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
533 result = NEW_RESOURCE_ARRAY(char, result_length);
534 UNICODE::as_quoted_ascii(base, length, result, result_length);
535 } else {
536 jbyte* base = value->byte_at_addr(0);
537 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
538 result = NEW_RESOURCE_ARRAY(char, result_length);
539 UNICODE::as_quoted_ascii(base, length, result, result_length);
540 }
541 assert(result_length >= length + 1, "must not be shorter");
542 assert(result_length == (int)strlen(result) + 1, "must match");
543 return result;
544 }
545
546 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
547 typeArrayOop value = java_lang_String::value(java_string);
548 int length = java_lang_String::length(java_string);
549 bool is_latin1 = java_lang_String::is_latin1(java_string);
550 if (!is_latin1) {
551 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
552 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
553 return sym;
554 } else {
555 ResourceMark rm;
556 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
557 const char* base = UNICODE::as_utf8(position, length);
558 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
559 return sym;
560 }
561 }
562
563 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
564 typeArrayOop value = java_lang_String::value(java_string);
565 int length = java_lang_String::length(java_string);
566 bool is_latin1 = java_lang_String::is_latin1(java_string);
567 if (!is_latin1) {
568 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
569 return SymbolTable::probe_unicode(base, length);
570 } else {
571 ResourceMark rm;
572 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
573 const char* base = UNICODE::as_utf8(position, length);
574 return SymbolTable::probe(base, length);
575 }
576 }
577
578 int java_lang_String::utf8_length(oop java_string) {
579 typeArrayOop value = java_lang_String::value(java_string);
580 int length = java_lang_String::length(java_string);
581 bool is_latin1 = java_lang_String::is_latin1(java_string);
582 if (length == 0) {
583 return 0;
584 }
585 if (!is_latin1) {
586 return UNICODE::utf8_length(value->char_at_addr(0), length);
587 } else {
588 return UNICODE::utf8_length(value->byte_at_addr(0), length);
589 }
590 }
591
592 char* java_lang_String::as_utf8_string(oop java_string) {
593 typeArrayOop value = java_lang_String::value(java_string);
594 int length = java_lang_String::length(java_string);
595 bool is_latin1 = java_lang_String::is_latin1(java_string);
596 if (!is_latin1) {
597 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
598 return UNICODE::as_utf8(position, length);
599 } else {
600 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
601 return UNICODE::as_utf8(position, length);
602 }
603 }
604
605 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
606 typeArrayOop value = java_lang_String::value(java_string);
607 int length = java_lang_String::length(java_string);
608 bool is_latin1 = java_lang_String::is_latin1(java_string);
609 if (!is_latin1) {
610 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
611 return UNICODE::as_utf8(position, length, buf, buflen);
612 } else {
613 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
614 return UNICODE::as_utf8(position, length, buf, buflen);
615 }
616 }
617
618 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
619 typeArrayOop value = java_lang_String::value(java_string);
620 int length = java_lang_String::length(java_string);
621 assert(start + len <= length, "just checking");
622 bool is_latin1 = java_lang_String::is_latin1(java_string);
623 if (!is_latin1) {
624 jchar* position = value->char_at_addr(start);
625 return UNICODE::as_utf8(position, len);
626 } else {
627 jbyte* position = value->byte_at_addr(start);
628 return UNICODE::as_utf8(position, len);
629 }
630 }
631
632 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
633 typeArrayOop value = java_lang_String::value(java_string);
634 int length = java_lang_String::length(java_string);
635 assert(start + len <= length, "just checking");
636 bool is_latin1 = java_lang_String::is_latin1(java_string);
637 if (!is_latin1) {
638 jchar* position = value->char_at_addr(start);
639 return UNICODE::as_utf8(position, len, buf, buflen);
640 } else {
641 jbyte* position = value->byte_at_addr(start);
642 return UNICODE::as_utf8(position, len, buf, buflen);
643 }
644 }
645
646 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
647 assert(java_string->klass() == SystemDictionary::String_klass(),
648 "must be java_string");
649 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
650 int length = java_lang_String::length(java_string);
651 if (length != len) {
652 return false;
653 }
654 bool is_latin1 = java_lang_String::is_latin1(java_string);
655 if (!is_latin1) {
656 for (int i = 0; i < len; i++) {
657 if (value->char_at(i) != chars[i]) {
658 return false;
659 }
660 }
661 } else {
662 for (int i = 0; i < len; i++) {
663 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
664 return false;
665 }
666 }
667 }
668 return true;
669 }
670
671 bool java_lang_String::equals(oop str1, oop str2) {
672 assert(str1->klass() == SystemDictionary::String_klass(),
673 "must be java String");
674 assert(str2->klass() == SystemDictionary::String_klass(),
675 "must be java String");
676 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
677 int length1 = java_lang_String::length(str1);
678 bool is_latin1 = java_lang_String::is_latin1(str1);
679 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
680 int length2 = java_lang_String::length(str2);
681 bool is_latin2 = java_lang_String::is_latin1(str2);
682
683 if ((length1 != length2) || (is_latin1 != is_latin2)) {
684 // Strings of different size or with different
685 // coders are never equal.
686 return false;
687 }
688 int blength1 = value1->length();
689 for (int i = 0; i < blength1; i++) {
690 if (value1->byte_at(i) != value2->byte_at(i)) {
691 return false;
692 }
693 }
694 return true;
695 }
696
697 void java_lang_String::print(oop java_string, outputStream* st) {
698 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
699 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
700
701 if (value == NULL) {
702 // This can happen if, e.g., printing a String
703 // object before its initializer has been called
704 st->print("NULL");
705 return;
706 }
707
708 int length = java_lang_String::length(java_string);
709 bool is_latin1 = java_lang_String::is_latin1(java_string);
710
711 st->print("\"");
712 for (int index = 0; index < length; index++) {
713 st->print("%c", (!is_latin1) ? value->char_at(index) :
714 ((jchar) value->byte_at(index)) & 0xff );
715 }
716 st->print("\"");
717 }
718
719
720 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
721 assert(mirror.not_null() && fd->is_static(), "just checking");
722 if (fd->has_initial_value()) {
723 BasicType t = fd->field_type();
724 switch (t) {
725 case T_BYTE:
726 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
727 break;
728 case T_BOOLEAN:
729 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
730 break;
731 case T_CHAR:
732 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
733 break;
734 case T_SHORT:
735 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
736 break;
737 case T_INT:
738 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
739 break;
740 case T_FLOAT:
741 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
742 break;
743 case T_DOUBLE:
744 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
745 break;
746 case T_LONG:
747 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
748 break;
749 case T_OBJECT:
750 {
751 assert(fd->signature() == vmSymbols::string_signature(),
752 "just checking");
753 if (DumpSharedSpaces && MetaspaceShared::is_archive_object(mirror())) {
754 // Archive the String field and update the pointer.
755 oop s = mirror()->obj_field(fd->offset());
756 oop archived_s = StringTable::create_archived_string(s, CHECK);
757 mirror()->obj_field_put(fd->offset(), archived_s);
758 } else {
759 oop string = fd->string_initial_value(CHECK);
760 mirror()->obj_field_put(fd->offset(), string);
761 }
762 }
763 break;
764 default:
765 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
766 "Illegal ConstantValue attribute in class file");
767 }
768 }
769 }
770
771
772 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
773 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
774
775 // If the offset was read from the shared archive, it was fixed up already
776 if (!k->is_shared()) {
777 if (k->is_instance_klass()) {
778 // During bootstrap, java.lang.Class wasn't loaded so static field
779 // offsets were computed without the size added it. Go back and
780 // update all the static field offsets to included the size.
781 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
782 if (fs.access_flags().is_static()) {
783 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
784 fs.set_offset(real_offset);
785 }
786 }
787 }
788 }
789
790 if (k->is_shared() && k->has_raw_archived_mirror()) {
791 if (MetaspaceShared::open_archive_heap_region_mapped()) {
792 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
793 assert(present, "Missing archived mirror for %s", k->external_name());
794 return;
795 } else {
796 k->set_java_mirror_handle(NULL);
797 k->clear_has_raw_archived_mirror();
798 }
799 }
800 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
801 }
802
803 void java_lang_Class::initialize_mirror_fields(Klass* k,
804 Handle mirror,
805 Handle protection_domain,
806 TRAPS) {
807 // Allocate a simple java object for a lock.
808 // This needs to be a java object because during class initialization
809 // it can be held across a java call.
810 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
811 set_init_lock(mirror(), r);
812
813 // Set protection domain also
814 set_protection_domain(mirror(), protection_domain());
815
816 // Initialize static fields
817 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
818 }
819
820 // Set the java.lang.Module module field in the java_lang_Class mirror
821 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
822 if (module.is_null()) {
823 // During startup, the module may be NULL only if java.base has not been defined yet.
824 // Put the class on the fixup_module_list to patch later when the java.lang.Module
825 // for java.base is known.
826 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
827
828 bool javabase_was_defined = false;
829 {
830 MutexLocker m1(Module_lock, THREAD);
831 // Keep list of classes needing java.base module fixup
832 if (!ModuleEntryTable::javabase_defined()) {
833 assert(k->java_mirror() != NULL, "Class's mirror is null");
834 k->class_loader_data()->inc_keep_alive();
835 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
836 fixup_module_field_list()->push(k);
837 } else {
838 javabase_was_defined = true;
839 }
840 }
841
842 // If java.base was already defined then patch this particular class with java.base.
843 if (javabase_was_defined) {
844 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
845 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
846 "Setting class module field, " JAVA_BASE_NAME " should be defined");
847 Handle javabase_handle(THREAD, javabase_entry->module());
848 set_module(mirror(), javabase_handle());
849 }
850 } else {
851 assert(Universe::is_module_initialized() ||
852 (ModuleEntryTable::javabase_defined() &&
853 (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
854 "Incorrect java.lang.Module specification while creating mirror");
855 set_module(mirror(), module());
856 }
857 }
858
859 // Statically allocate fixup lists because they always get created.
860 void java_lang_Class::allocate_fixup_lists() {
861 GrowableArray<Klass*>* mirror_list =
862 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
863 set_fixup_mirror_list(mirror_list);
864
865 GrowableArray<Klass*>* module_list =
866 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
867 set_fixup_module_field_list(module_list);
868 }
869
870 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
871 Handle module, Handle protection_domain, TRAPS) {
872 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
873 assert(k->java_mirror() == NULL, "should only assign mirror once");
874
875 // Use this moment of initialization to cache modifier_flags also,
876 // to support Class.getModifiers(). Instance classes recalculate
877 // the cached flags after the class file is parsed, but before the
878 // class is put into the system dictionary.
879 int computed_modifiers = k->compute_modifier_flags(CHECK);
880 k->set_modifier_flags(computed_modifiers);
881 // Class_klass has to be loaded because it is used to allocate
882 // the mirror.
883 if (SystemDictionary::Class_klass_loaded()) {
884 // Allocate mirror (java.lang.Class instance)
885 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
886 Handle mirror(THREAD, mirror_oop);
887 Handle comp_mirror;
888
889 // Setup indirection from mirror->klass
890 java_lang_Class::set_klass(mirror(), k);
891
892 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
893 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
894
895 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
896
897 // It might also have a component mirror. This mirror must already exist.
898 if (k->is_array_klass()) {
899 if (k->is_typeArray_klass()) {
900 BasicType type = TypeArrayKlass::cast(k)->element_type();
901 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
902 } else {
903 assert(k->is_objArray_klass(), "Must be");
904 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
905 assert(element_klass != NULL, "Must have an element klass");
906 comp_mirror = Handle(THREAD, element_klass->java_mirror());
907 }
908 assert(comp_mirror() != NULL, "must have a mirror");
909
910 // Two-way link between the array klass and its component mirror:
911 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
912 set_component_mirror(mirror(), comp_mirror());
913 // See below for ordering dependencies between field array_klass in component mirror
914 // and java_mirror in this klass.
915 } else {
916 assert(k->is_instance_klass(), "Must be");
917
918 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
919 if (HAS_PENDING_EXCEPTION) {
920 // If any of the fields throws an exception like OOM remove the klass field
921 // from the mirror so GC doesn't follow it after the klass has been deallocated.
922 // This mirror looks like a primitive type, which logically it is because it
923 // it represents no class.
924 java_lang_Class::set_klass(mirror(), NULL);
925 return;
926 }
927 }
928
929 // set the classLoader field in the java_lang_Class instance
930 assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
931 set_class_loader(mirror(), class_loader());
932
933 // Setup indirection from klass->mirror
934 // after any exceptions can happen during allocations.
935 k->set_java_mirror(mirror);
936
937 // Set the module field in the java_lang_Class instance. This must be done
938 // after the mirror is set.
939 set_mirror_module_field(k, mirror, module, THREAD);
940
941 if (comp_mirror() != NULL) {
942 // Set after k->java_mirror() is published, because compiled code running
943 // concurrently doesn't expect a k to have a null java_mirror.
944 release_set_array_klass(comp_mirror(), k);
945 }
946 } else {
947 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
948 fixup_mirror_list()->push(k);
949 }
950 }
951
952 #if INCLUDE_CDS_JAVA_HEAP
953 // Clears mirror fields. Static final fields with initial values are reloaded
954 // from constant pool. The object identity hash is in the object header and is
955 // not affected.
956 class ResetMirrorField: public FieldClosure {
957 private:
958 Handle _m;
959
960 public:
961 ResetMirrorField(Handle mirror) : _m(mirror) {}
962
963 void do_field(fieldDescriptor* fd) {
964 assert(DumpSharedSpaces, "dump time only");
965 assert(_m.not_null(), "Mirror cannot be NULL");
966
967 if (fd->is_static() && fd->has_initial_value()) {
968 initialize_static_field(fd, _m, Thread::current());
969 return;
970 }
971
972 BasicType ft = fd->field_type();
973 switch (ft) {
974 case T_BYTE:
975 _m()->byte_field_put(fd->offset(), 0);
976 break;
977 case T_CHAR:
978 _m()->char_field_put(fd->offset(), 0);
979 break;
980 case T_DOUBLE:
981 _m()->double_field_put(fd->offset(), 0);
982 break;
983 case T_FLOAT:
984 _m()->float_field_put(fd->offset(), 0);
985 break;
986 case T_INT:
987 _m()->int_field_put(fd->offset(), 0);
988 break;
989 case T_LONG:
990 _m()->long_field_put(fd->offset(), 0);
991 break;
992 case T_SHORT:
993 _m()->short_field_put(fd->offset(), 0);
994 break;
995 case T_BOOLEAN:
996 _m()->bool_field_put(fd->offset(), false);
997 break;
998 case T_ARRAY:
999 case T_OBJECT: {
1000 // It might be useful to cache the String field, but
1001 // for now just clear out any reference field
1002 oop o = _m()->obj_field(fd->offset());
1003 _m()->obj_field_put(fd->offset(), NULL);
1004 break;
1005 }
1006 default:
1007 ShouldNotReachHere();
1008 break;
1009 }
1010 }
1011 };
1012
1013 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1014 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1015 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1016
1017 for (int t = 0; t <= T_VOID; t++) {
1018 oop m = Universe::_mirrors[t];
1019 if (m != NULL) {
1020 // Update the field at _array_klass_offset to point to the relocated array klass.
1021 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD);
1022 assert(archived_m != NULL, "sanity");
1023 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1024 assert(ak != NULL || t == T_VOID, "should not be NULL");
1025 if (ak != NULL) {
1026 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1027 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1028 }
1029
1030 // Clear the fields. Just to be safe
1031 Klass *k = m->klass();
1032 Handle archived_mirror_h(THREAD, archived_m);
1033 ResetMirrorField reset(archived_mirror_h);
1034 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1035
1036 log_trace(cds, heap, mirror)(
1037 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1038 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1039
1040 Universe::_mirrors[t] = archived_m;
1041 }
1042 }
1043
1044 assert(Universe::_mirrors[T_INT] != NULL &&
1045 Universe::_mirrors[T_FLOAT] != NULL &&
1046 Universe::_mirrors[T_DOUBLE] != NULL &&
1047 Universe::_mirrors[T_BYTE] != NULL &&
1048 Universe::_mirrors[T_BOOLEAN] != NULL &&
1049 Universe::_mirrors[T_CHAR] != NULL &&
1050 Universe::_mirrors[T_LONG] != NULL &&
1051 Universe::_mirrors[T_SHORT] != NULL &&
1052 Universe::_mirrors[T_VOID] != NULL, "sanity");
1053
1054 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1055 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1056 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1057 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1058 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1059 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1060 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1061 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1062 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1063 }
1064
1065 //
1066 // After the mirror object is successfully archived, the archived
1067 // klass is set with _has_archived_raw_mirror flag.
1068 //
1069 // The _has_archived_raw_mirror flag is cleared at runtime when the
1070 // archived mirror is restored. If archived java heap data cannot
1071 // be used at runtime, new mirror object is created for the shared
1072 // class. The _has_archived_raw_mirror is cleared also during the process.
1073 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1074 assert(MetaspaceShared::is_heap_object_archiving_allowed(),
1075 "MetaspaceShared::is_heap_object_archiving_allowed() must be true");
1076
1077 // Mirror is already archived
1078 if (k->has_raw_archived_mirror()) {
1079 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1080 return k->archived_java_mirror_raw();
1081 }
1082
1083 // No mirror
1084 oop mirror = k->java_mirror();
1085 if (mirror == NULL) {
1086 return NULL;
1087 }
1088
1089 if (k->is_instance_klass()) {
1090 InstanceKlass *ik = InstanceKlass::cast(k);
1091 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(),
1092 "class with signer cannot be supported");
1093
1094 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1095 ik->is_shared_app_class())) {
1096 // Archiving mirror for classes from non-builtin loaders is not
1097 // supported. Clear the _java_mirror within the archived class.
1098 k->set_java_mirror_handle(NULL);
1099 return NULL;
1100 }
1101 }
1102
1103 // Now start archiving the mirror object
1104 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD);
1105 if (archived_mirror == NULL) {
1106 return NULL;
1107 }
1108
1109 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1110 if (archived_mirror == NULL) {
1111 return NULL;
1112 }
1113
1114 k->set_archived_java_mirror_raw(archived_mirror);
1115
1116 k->set_has_raw_archived_mirror();
1117
1118 ResourceMark rm;
1119 log_trace(cds, heap, mirror)(
1120 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1121 k->external_name(), p2i(mirror), p2i(archived_mirror));
1122
1123 return archived_mirror;
1124 }
1125
1126 // The process is based on create_mirror().
1127 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1128 oop archived_mirror,
1129 Thread *THREAD) {
1130 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1131 // to archived metadata and objects below.
1132 Klass *c = archived_mirror->klass();
1133 Handle archived_mirror_h(THREAD, archived_mirror);
1134 ResetMirrorField reset(archived_mirror_h);
1135 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1136
1137 if (k->is_array_klass()) {
1138 oop archived_comp_mirror;
1139 if (k->is_typeArray_klass()) {
1140 // The primitive type mirrors are already archived. Get the archived mirror.
1141 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1142 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror);
1143 assert(archived_comp_mirror != NULL, "Must be");
1144 } else {
1145 assert(k->is_objArray_klass(), "Must be");
1146 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1147 assert(element_klass != NULL, "Must have an element klass");
1148 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1149 if (archived_comp_mirror == NULL) {
1150 return NULL;
1151 }
1152 }
1153 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1154 } else {
1155 assert(k->is_instance_klass(), "Must be");
1156
1157 // Reset local static fields in the mirror
1158 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1159
1160 java_lang_Class:set_init_lock(archived_mirror, NULL);
1161
1162 set_protection_domain(archived_mirror, NULL);
1163 }
1164
1165 // clear class loader and mirror_module_field
1166 set_class_loader(archived_mirror, NULL);
1167 set_module(archived_mirror, NULL);
1168
1169 // The archived mirror's field at _klass_offset is still pointing to the original
1170 // klass. Updated the field in the archived mirror to point to the relocated
1171 // klass in the archive.
1172 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1173 log_debug(cds, heap, mirror)(
1174 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1175 p2i(as_Klass(mirror)), p2i(reloc_k));
1176 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1177
1178 // The field at _array_klass_offset is pointing to the original one dimension
1179 // higher array klass if exists. Relocate the pointer.
1180 Klass *arr = array_klass_acquire(mirror);
1181 if (arr != NULL) {
1182 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1183 log_debug(cds, heap, mirror)(
1184 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1185 p2i(arr), p2i(reloc_arr));
1186 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1187 }
1188 return archived_mirror;
1189 }
1190
1191 // Returns true if the mirror is updated, false if no archived mirror
1192 // data is present. After the archived mirror object is restored, the
1193 // shared klass' _has_raw_archived_mirror flag is cleared.
1194 bool java_lang_Class::restore_archived_mirror(Klass *k,
1195 Handle class_loader, Handle module,
1196 Handle protection_domain, TRAPS) {
1197 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1198 // see more details in SystemDictionary::resolve_preloaded_classes().
1199 if (!SystemDictionary::Class_klass_loaded()) {
1200 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1201 fixup_mirror_list()->push(k);
1202 return true;
1203 }
1204
1205 oop m = MetaspaceShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1206
1207 if (m == NULL) {
1208 return false;
1209 }
1210
1211 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1212
1213 // mirror is archived, restore
1214 assert(MetaspaceShared::is_archive_object(m), "must be archived mirror object");
1215 Handle mirror(THREAD, m);
1216
1217 if (!k->is_array_klass()) {
1218 // - local static final fields with initial values were initialized at dump time
1219
1220 // create the init_lock
1221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1222 set_init_lock(mirror(), r);
1223
1224 if (protection_domain.not_null()) {
1225 set_protection_domain(mirror(), protection_domain());
1226 }
1227 }
1228
1229 assert(class_loader() == k->class_loader(), "should be same");
1230 if (class_loader.not_null()) {
1231 set_class_loader(mirror(), class_loader());
1232 }
1233
1234 k->set_java_mirror(mirror);
1235 k->clear_has_raw_archived_mirror();
1236
1237 set_mirror_module_field(k, mirror, module, THREAD);
1238
1239 ResourceMark rm;
1240 log_trace(cds, heap, mirror)(
1241 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1242
1243 return true;
1244 }
1245 #endif // INCLUDE_CDS_JAVA_HEAP
1246
1247 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1248 assert(_module_offset != 0, "must have been computed already");
1249 java_lang_Class::set_module(k->java_mirror(), module());
1250 }
1251
1252 int java_lang_Class::oop_size(oop java_class) {
1253 assert(_oop_size_offset != 0, "must be set");
1254 int size = java_class->int_field(_oop_size_offset);
1255 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1256 return size;
1257 }
1258
1259 int java_lang_Class::oop_size_raw(oop java_class) {
1260 assert(_oop_size_offset != 0, "must be set");
1261 int size = java_class->int_field_raw(_oop_size_offset);
1262 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1263 return size;
1264 }
1265
1266 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1267 assert(_oop_size_offset != 0, "must be set");
1268 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1269 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1270 }
1271
1272 int java_lang_Class::static_oop_field_count(oop java_class) {
1273 assert(_static_oop_field_count_offset != 0, "must be set");
1274 return java_class->int_field(_static_oop_field_count_offset);
1275 }
1276
1277 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1278 assert(_static_oop_field_count_offset != 0, "must be set");
1279 return java_class->int_field_raw(_static_oop_field_count_offset);
1280 }
1281
1282 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1283 assert(_static_oop_field_count_offset != 0, "must be set");
1284 java_class->int_field_put(_static_oop_field_count_offset, size);
1285 }
1286
1287 oop java_lang_Class::protection_domain(oop java_class) {
1288 assert(_protection_domain_offset != 0, "must be set");
1289 return java_class->obj_field(_protection_domain_offset);
1290 }
1291 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1292 assert(_protection_domain_offset != 0, "must be set");
1293 java_class->obj_field_put(_protection_domain_offset, pd);
1294 }
1295
1296 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1297 assert(_component_mirror_offset != 0, "must be set");
1298 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1299 }
1300 oop java_lang_Class::component_mirror(oop java_class) {
1301 assert(_component_mirror_offset != 0, "must be set");
1302 return java_class->obj_field(_component_mirror_offset);
1303 }
1304
1305 oop java_lang_Class::init_lock(oop java_class) {
1306 assert(_init_lock_offset != 0, "must be set");
1307 return java_class->obj_field(_init_lock_offset);
1308 }
1309 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1310 assert(_init_lock_offset != 0, "must be set");
1311 java_class->obj_field_put(_init_lock_offset, init_lock);
1312 }
1313
1314 objArrayOop java_lang_Class::signers(oop java_class) {
1315 assert(_signers_offset != 0, "must be set");
1316 return (objArrayOop)java_class->obj_field(_signers_offset);
1317 }
1318 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1319 assert(_signers_offset != 0, "must be set");
1320 java_class->obj_field_put(_signers_offset, (oop)signers);
1321 }
1322
1323
1324 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1325 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1326 if (_class_loader_offset != 0) {
1327 java_class->obj_field_put(_class_loader_offset, loader);
1328 }
1329 }
1330
1331 oop java_lang_Class::class_loader(oop java_class) {
1332 assert(_class_loader_offset != 0, "must be set");
1333 return java_class->obj_field(_class_loader_offset);
1334 }
1335
1336 oop java_lang_Class::module(oop java_class) {
1337 assert(_module_offset != 0, "must be set");
1338 return java_class->obj_field(_module_offset);
1339 }
1340
1341 void java_lang_Class::set_module(oop java_class, oop module) {
1342 assert(_module_offset != 0, "must be set");
1343 java_class->obj_field_put(_module_offset, module);
1344 }
1345
1346 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1347 // This should be improved by adding a field at the Java level or by
1348 // introducing a new VM klass (see comment in ClassFileParser)
1349 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1350 if (type != T_VOID) {
1351 Klass* aklass = Universe::typeArrayKlassObj(type);
1352 assert(aklass != NULL, "correct bootstrap");
1353 release_set_array_klass(java_class, aklass);
1354 }
1355 #ifdef ASSERT
1356 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1357 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1358 #endif
1359 return java_class;
1360 }
1361
1362
1363 Klass* java_lang_Class::as_Klass(oop java_class) {
1364 //%note memory_2
1365 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1366 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1367 assert(k == NULL || k->is_klass(), "type check");
1368 return k;
1369 }
1370
1371 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1372 //%note memory_2
1373 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1374 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1375 assert(k == NULL || k->is_klass(), "type check");
1376 return k;
1377 }
1378
1379
1380 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1381 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1382 java_class->metadata_field_put(_klass_offset, klass);
1383 }
1384
1385
1386 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1387 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1388 Symbol* name = NULL;
1389 bool is_instance = false;
1390 if (is_primitive(java_class)) {
1391 name = vmSymbols::type_signature(primitive_type(java_class));
1392 } else {
1393 Klass* k = as_Klass(java_class);
1394 is_instance = k->is_instance_klass();
1395 name = k->name();
1396 }
1397 if (name == NULL) {
1398 st->print("<null>");
1399 return;
1400 }
1401 if (is_instance) st->print("L");
1402 st->write((char*) name->base(), (int) name->utf8_length());
1403 if (is_instance) st->print(";");
1404 }
1405
1406 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1407 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1408 Symbol* name;
1409 if (is_primitive(java_class)) {
1410 name = vmSymbols::type_signature(primitive_type(java_class));
1411 // Because this can create a new symbol, the caller has to decrement
1412 // the refcount, so make adjustment here and below for symbols returned
1413 // that are not created or incremented due to a successful lookup.
1414 name->increment_refcount();
1415 } else {
1416 Klass* k = as_Klass(java_class);
1417 if (!k->is_instance_klass()) {
1418 name = k->name();
1419 name->increment_refcount();
1420 } else {
1421 ResourceMark rm;
1422 const char* sigstr = k->signature_name();
1423 int siglen = (int) strlen(sigstr);
1424 if (!intern_if_not_found) {
1425 name = SymbolTable::probe(sigstr, siglen);
1426 } else {
1427 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1428 }
1429 }
1430 }
1431 return name;
1432 }
1433
1434 // Returns the Java name for this Java mirror (Resource allocated)
1435 // See Klass::external_name().
1436 // For primitive type Java mirrors, its type name is returned.
1437 const char* java_lang_Class::as_external_name(oop java_class) {
1438 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1439 const char* name = NULL;
1440 if (is_primitive(java_class)) {
1441 name = type2name(primitive_type(java_class));
1442 } else {
1443 name = as_Klass(java_class)->external_name();
1444 }
1445 if (name == NULL) {
1446 name = "<null>";
1447 }
1448 return name;
1449 }
1450
1451 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1452 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1453 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1454 return k;
1455 }
1456
1457
1458 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1459 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1460 java_class->release_metadata_field_put(_array_klass_offset, klass);
1461 }
1462
1463
1464 bool java_lang_Class::is_primitive(oop java_class) {
1465 // should assert:
1466 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1467 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1468
1469 #ifdef ASSERT
1470 if (is_primitive) {
1471 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1472 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1473 "Should be either the T_VOID primitive or a java primitive");
1474 }
1475 #endif
1476
1477 return is_primitive;
1478 }
1479
1480
1481 BasicType java_lang_Class::primitive_type(oop java_class) {
1482 assert(java_lang_Class::is_primitive(java_class), "just checking");
1483 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1484 BasicType type = T_VOID;
1485 if (ak != NULL) {
1486 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1487 type = ArrayKlass::cast(ak)->element_type();
1488 } else {
1489 assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1490 }
1491 assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1492 return type;
1493 }
1494
1495 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1496 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1497 if (is_primitive(java_class)) {
1498 if (reference_klass != NULL)
1499 (*reference_klass) = NULL;
1500 return primitive_type(java_class);
1501 } else {
1502 if (reference_klass != NULL)
1503 (*reference_klass) = as_Klass(java_class);
1504 return T_OBJECT;
1505 }
1506 }
1507
1508
1509 oop java_lang_Class::primitive_mirror(BasicType t) {
1510 oop mirror = Universe::java_mirror(t);
1511 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1512 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1513 return mirror;
1514 }
1515
1516 bool java_lang_Class::offsets_computed = false;
1517 int java_lang_Class::classRedefinedCount_offset = -1;
1518
1519 #define CLASS_FIELDS_DO(macro) \
1520 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1521 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1522 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1523 macro(_module_offset, k, "module", module_signature, false)
1524
1525 void java_lang_Class::compute_offsets() {
1526 if (offsets_computed) {
1527 return;
1528 }
1529
1530 offsets_computed = true;
1531
1532 InstanceKlass* k = SystemDictionary::Class_klass();
1533 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1534
1535 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1536 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1537 // GC treats them the same.
1538 _init_lock_offset = _component_mirror_offset;
1539
1540 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1541 }
1542
1543 #if INCLUDE_CDS
1544 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1545 f->do_u4((u4*)&offsets_computed);
1546 f->do_u4((u4*)&_init_lock_offset);
1547
1548 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1549
1550 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1551 }
1552 #endif
1553
1554 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1555 if (classRedefinedCount_offset == -1) {
1556 // If we don't have an offset for it then just return -1 as a marker.
1557 return -1;
1558 }
1559
1560 return the_class_mirror->int_field(classRedefinedCount_offset);
1561 }
1562
1563 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1564 if (classRedefinedCount_offset == -1) {
1565 // If we don't have an offset for it then nothing to set.
1566 return;
1567 }
1568
1569 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1570 }
1571
1572
1573 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1574 // platform thread structure, and a eetop offset which was used for thread
1575 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1576 // merged, so in the HotSpot VM we just use the eetop field for the thread
1577 // instead of the privateInfo_offset.
1578 //
1579 // Note: The stackSize field is only present starting in 1.4.
1580
1581 int java_lang_Thread::_name_offset = 0;
1582 int java_lang_Thread::_group_offset = 0;
1583 int java_lang_Thread::_contextClassLoader_offset = 0;
1584 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1585 int java_lang_Thread::_priority_offset = 0;
1586 int java_lang_Thread::_eetop_offset = 0;
1587 int java_lang_Thread::_daemon_offset = 0;
1588 int java_lang_Thread::_stillborn_offset = 0;
1589 int java_lang_Thread::_stackSize_offset = 0;
1590 int java_lang_Thread::_tid_offset = 0;
1591 int java_lang_Thread::_thread_status_offset = 0;
1592 int java_lang_Thread::_park_blocker_offset = 0;
1593 int java_lang_Thread::_park_event_offset = 0 ;
1594
1595 #define THREAD_FIELDS_DO(macro) \
1596 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1597 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1598 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1599 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1600 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1601 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1602 macro(_eetop_offset, k, "eetop", long_signature, false); \
1603 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1604 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1605 macro(_tid_offset, k, "tid", long_signature, false); \
1606 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1607 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \
1608 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false)
1609
1610 void java_lang_Thread::compute_offsets() {
1611 assert(_group_offset == 0, "offsets should be initialized only once");
1612
1613 InstanceKlass* k = SystemDictionary::Thread_klass();
1614 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1615 }
1616
1617 #if INCLUDE_CDS
1618 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1619 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1620 }
1621 #endif
1622
1623 JavaThread* java_lang_Thread::thread(oop java_thread) {
1624 return (JavaThread*)java_thread->address_field(_eetop_offset);
1625 }
1626
1627
1628 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1629 java_thread->address_field_put(_eetop_offset, (address)thread);
1630 }
1631
1632
1633 oop java_lang_Thread::name(oop java_thread) {
1634 return java_thread->obj_field(_name_offset);
1635 }
1636
1637
1638 void java_lang_Thread::set_name(oop java_thread, oop name) {
1639 java_thread->obj_field_put(_name_offset, name);
1640 }
1641
1642
1643 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1644 return (ThreadPriority)java_thread->int_field(_priority_offset);
1645 }
1646
1647
1648 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1649 java_thread->int_field_put(_priority_offset, priority);
1650 }
1651
1652
1653 oop java_lang_Thread::threadGroup(oop java_thread) {
1654 return java_thread->obj_field(_group_offset);
1655 }
1656
1657
1658 bool java_lang_Thread::is_stillborn(oop java_thread) {
1659 return java_thread->bool_field(_stillborn_offset) != 0;
1660 }
1661
1662
1663 // We never have reason to turn the stillborn bit off
1664 void java_lang_Thread::set_stillborn(oop java_thread) {
1665 java_thread->bool_field_put(_stillborn_offset, true);
1666 }
1667
1668
1669 bool java_lang_Thread::is_alive(oop java_thread) {
1670 JavaThread* thr = java_lang_Thread::thread(java_thread);
1671 return (thr != NULL);
1672 }
1673
1674
1675 bool java_lang_Thread::is_daemon(oop java_thread) {
1676 return java_thread->bool_field(_daemon_offset) != 0;
1677 }
1678
1679
1680 void java_lang_Thread::set_daemon(oop java_thread) {
1681 java_thread->bool_field_put(_daemon_offset, true);
1682 }
1683
1684 oop java_lang_Thread::context_class_loader(oop java_thread) {
1685 return java_thread->obj_field(_contextClassLoader_offset);
1686 }
1687
1688 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1689 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1690 }
1691
1692
1693 jlong java_lang_Thread::stackSize(oop java_thread) {
1694 if (_stackSize_offset > 0) {
1695 return java_thread->long_field(_stackSize_offset);
1696 } else {
1697 return 0;
1698 }
1699 }
1700
1701 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1702 void java_lang_Thread::set_thread_status(oop java_thread,
1703 java_lang_Thread::ThreadStatus status) {
1704 // The threadStatus is only present starting in 1.5
1705 if (_thread_status_offset > 0) {
1706 java_thread->int_field_put(_thread_status_offset, status);
1707 }
1708 }
1709
1710 // Read thread status value from threadStatus field in java.lang.Thread java class.
1711 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1712 // Make sure the caller is operating on behalf of the VM or is
1713 // running VM code (state == _thread_in_vm).
1714 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1715 JavaThread::current()->thread_state() == _thread_in_vm,
1716 "Java Thread is not running in vm");
1717 // The threadStatus is only present starting in 1.5
1718 if (_thread_status_offset > 0) {
1719 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1720 } else {
1721 // All we can easily figure out is if it is alive, but that is
1722 // enough info for a valid unknown status.
1723 // These aren't restricted to valid set ThreadStatus values, so
1724 // use JVMTI values and cast.
1725 JavaThread* thr = java_lang_Thread::thread(java_thread);
1726 if (thr == NULL) {
1727 // the thread hasn't run yet or is in the process of exiting
1728 return NEW;
1729 }
1730 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1731 }
1732 }
1733
1734
1735 jlong java_lang_Thread::thread_id(oop java_thread) {
1736 // The thread ID field is only present starting in 1.5
1737 if (_tid_offset > 0) {
1738 return java_thread->long_field(_tid_offset);
1739 } else {
1740 return 0;
1741 }
1742 }
1743
1744 oop java_lang_Thread::park_blocker(oop java_thread) {
1745 assert(JDK_Version::current().supports_thread_park_blocker() &&
1746 _park_blocker_offset != 0, "Must support parkBlocker field");
1747
1748 if (_park_blocker_offset > 0) {
1749 return java_thread->obj_field(_park_blocker_offset);
1750 }
1751
1752 return NULL;
1753 }
1754
1755 jlong java_lang_Thread::park_event(oop java_thread) {
1756 if (_park_event_offset > 0) {
1757 return java_thread->long_field(_park_event_offset);
1758 }
1759 return 0;
1760 }
1761
1762 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1763 if (_park_event_offset > 0) {
1764 java_thread->long_field_put(_park_event_offset, ptr);
1765 return true;
1766 }
1767 return false;
1768 }
1769
1770
1771 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1772 assert(_thread_status_offset != 0, "Must have thread status");
1773 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1774 switch (status) {
1775 case NEW : return "NEW";
1776 case RUNNABLE : return "RUNNABLE";
1777 case SLEEPING : return "TIMED_WAITING (sleeping)";
1778 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1779 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1780 case PARKED : return "WAITING (parking)";
1781 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1782 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1783 case TERMINATED : return "TERMINATED";
1784 default : return "UNKNOWN";
1785 };
1786 }
1787 int java_lang_ThreadGroup::_parent_offset = 0;
1788 int java_lang_ThreadGroup::_name_offset = 0;
1789 int java_lang_ThreadGroup::_threads_offset = 0;
1790 int java_lang_ThreadGroup::_groups_offset = 0;
1791 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1792 int java_lang_ThreadGroup::_destroyed_offset = 0;
1793 int java_lang_ThreadGroup::_daemon_offset = 0;
1794 int java_lang_ThreadGroup::_nthreads_offset = 0;
1795 int java_lang_ThreadGroup::_ngroups_offset = 0;
1796
1797 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1798 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1799 return java_thread_group->obj_field(_parent_offset);
1800 }
1801
1802 // ("name as oop" accessor is not necessary)
1803
1804 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1805 oop name = java_thread_group->obj_field(_name_offset);
1806 // ThreadGroup.name can be null
1807 if (name != NULL) {
1808 return java_lang_String::as_utf8_string(name);
1809 }
1810 return NULL;
1811 }
1812
1813 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1814 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1815 return java_thread_group->int_field(_nthreads_offset);
1816 }
1817
1818 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1819 oop threads = java_thread_group->obj_field(_threads_offset);
1820 assert(threads != NULL, "threadgroups should have threads");
1821 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1822 return objArrayOop(threads);
1823 }
1824
1825 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1826 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1827 return java_thread_group->int_field(_ngroups_offset);
1828 }
1829
1830 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1831 oop groups = java_thread_group->obj_field(_groups_offset);
1832 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1833 return objArrayOop(groups);
1834 }
1835
1836 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1837 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1838 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1839 }
1840
1841 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1842 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1843 return java_thread_group->bool_field(_destroyed_offset) != 0;
1844 }
1845
1846 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1847 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1848 return java_thread_group->bool_field(_daemon_offset) != 0;
1849 }
1850
1851 #define THREADGROUP_FIELDS_DO(macro) \
1852 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1853 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1854 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1855 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1856 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1857 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1858 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1859 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1860 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1861
1862 void java_lang_ThreadGroup::compute_offsets() {
1863 assert(_parent_offset == 0, "offsets should be initialized only once");
1864
1865 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1866 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1867 }
1868
1869 #if INCLUDE_CDS
1870 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1871 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1872 }
1873 #endif
1874
1875 #define THROWABLE_FIELDS_DO(macro) \
1876 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1877 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1878 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1879 macro(depth_offset, k, "depth", int_signature, false); \
1880 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1881
1882 void java_lang_Throwable::compute_offsets() {
1883 InstanceKlass* k = SystemDictionary::Throwable_klass();
1884 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1885 }
1886
1887 #if INCLUDE_CDS
1888 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1889 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1890 }
1891 #endif
1892
1893 oop java_lang_Throwable::unassigned_stacktrace() {
1894 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1895 oop base = ik->static_field_base_raw();
1896 return base->obj_field(static_unassigned_stacktrace_offset);
1897 }
1898
1899 oop java_lang_Throwable::backtrace(oop throwable) {
1900 return throwable->obj_field_acquire(backtrace_offset);
1901 }
1902
1903
1904 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1905 throwable->release_obj_field_put(backtrace_offset, value);
1906 }
1907
1908 int java_lang_Throwable::depth(oop throwable) {
1909 return throwable->int_field(depth_offset);
1910 }
1911
1912 void java_lang_Throwable::set_depth(oop throwable, int value) {
1913 throwable->int_field_put(depth_offset, value);
1914 }
1915
1916 oop java_lang_Throwable::message(oop throwable) {
1917 return throwable->obj_field(detailMessage_offset);
1918 }
1919
1920
1921 // Return Symbol for detailed_message or NULL
1922 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1923 PRESERVE_EXCEPTION_MARK; // Keep original exception
1924 oop detailed_message = java_lang_Throwable::message(throwable);
1925 if (detailed_message != NULL) {
1926 return java_lang_String::as_symbol(detailed_message, THREAD);
1927 }
1928 return NULL;
1929 }
1930
1931 void java_lang_Throwable::set_message(oop throwable, oop value) {
1932 throwable->obj_field_put(detailMessage_offset, value);
1933 }
1934
1935
1936 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1937 throwable->obj_field_put(stackTrace_offset, st_element_array);
1938 }
1939
1940 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1941 set_stacktrace(throwable, NULL);
1942 }
1943
1944
1945 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1946 ResourceMark rm;
1947 Klass* k = throwable->klass();
1948 assert(k != NULL, "just checking");
1949 st->print("%s", k->external_name());
1950 oop msg = message(throwable);
1951 if (msg != NULL) {
1952 st->print(": %s", java_lang_String::as_utf8_string(msg));
1953 }
1954 }
1955
1956 // After this many redefines, the stack trace is unreliable.
1957 const int MAX_VERSION = USHRT_MAX;
1958
1959 static inline bool version_matches(Method* method, int version) {
1960 assert(version < MAX_VERSION, "version is too big");
1961 return method != NULL && (method->constants()->version() == version);
1962 }
1963
1964
1965 // This class provides a simple wrapper over the internal structure of
1966 // exception backtrace to insulate users of the backtrace from needing
1967 // to know what it looks like.
1968 class BacktraceBuilder: public StackObj {
1969 friend class BacktraceIterator;
1970 private:
1971 Handle _backtrace;
1972 objArrayOop _head;
1973 typeArrayOop _methods;
1974 typeArrayOop _bcis;
1975 objArrayOop _mirrors;
1976 typeArrayOop _names; // needed to insulate method name against redefinition
1977 int _index;
1978 NoSafepointVerifier _nsv;
1979
1980 enum {
1981 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1982 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1983 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1984 trace_names_offset = java_lang_Throwable::trace_names_offset,
1985 trace_next_offset = java_lang_Throwable::trace_next_offset,
1986 trace_size = java_lang_Throwable::trace_size,
1987 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1988 };
1989
1990 // get info out of chunks
1991 static typeArrayOop get_methods(objArrayHandle chunk) {
1992 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1993 assert(methods != NULL, "method array should be initialized in backtrace");
1994 return methods;
1995 }
1996 static typeArrayOop get_bcis(objArrayHandle chunk) {
1997 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1998 assert(bcis != NULL, "bci array should be initialized in backtrace");
1999 return bcis;
2000 }
2001 static objArrayOop get_mirrors(objArrayHandle chunk) {
2002 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2003 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2004 return mirrors;
2005 }
2006 static typeArrayOop get_names(objArrayHandle chunk) {
2007 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2008 assert(names != NULL, "names array should be initialized in backtrace");
2009 return names;
2010 }
2011
2012 public:
2013
2014 // constructor for new backtrace
2015 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2016 expand(CHECK);
2017 _backtrace = Handle(THREAD, _head);
2018 _index = 0;
2019 }
2020
2021 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2022 _methods = get_methods(backtrace);
2023 _bcis = get_bcis(backtrace);
2024 _mirrors = get_mirrors(backtrace);
2025 _names = get_names(backtrace);
2026 assert(_methods->length() == _bcis->length() &&
2027 _methods->length() == _mirrors->length() &&
2028 _mirrors->length() == _names->length(),
2029 "method and source information arrays should match");
2030
2031 // head is the preallocated backtrace
2032 _head = backtrace();
2033 _backtrace = Handle(thread, _head);
2034 _index = 0;
2035 }
2036
2037 void expand(TRAPS) {
2038 objArrayHandle old_head(THREAD, _head);
2039 PauseNoSafepointVerifier pnsv(&_nsv);
2040
2041 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2042 objArrayHandle new_head(THREAD, head);
2043
2044 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2045 typeArrayHandle new_methods(THREAD, methods);
2046
2047 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2048 typeArrayHandle new_bcis(THREAD, bcis);
2049
2050 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2051 objArrayHandle new_mirrors(THREAD, mirrors);
2052
2053 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2054 typeArrayHandle new_names(THREAD, names);
2055
2056 if (!old_head.is_null()) {
2057 old_head->obj_at_put(trace_next_offset, new_head());
2058 }
2059 new_head->obj_at_put(trace_methods_offset, new_methods());
2060 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2061 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2062 new_head->obj_at_put(trace_names_offset, new_names());
2063
2064 _head = new_head();
2065 _methods = new_methods();
2066 _bcis = new_bcis();
2067 _mirrors = new_mirrors();
2068 _names = new_names();
2069 _index = 0;
2070 }
2071
2072 oop backtrace() {
2073 return _backtrace();
2074 }
2075
2076 inline void push(Method* method, int bci, TRAPS) {
2077 // Smear the -1 bci to 0 since the array only holds unsigned
2078 // shorts. The later line number lookup would just smear the -1
2079 // to a 0 even if it could be recorded.
2080 if (bci == SynchronizationEntryBCI) bci = 0;
2081
2082 if (_index >= trace_chunk_size) {
2083 methodHandle mhandle(THREAD, method);
2084 expand(CHECK);
2085 method = mhandle();
2086 }
2087
2088 _methods->ushort_at_put(_index, method->orig_method_idnum());
2089 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2090
2091 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2092 // klass owning the symbols alive so their refcounts aren't decremented.
2093 Symbol* name = method->name();
2094 _names->symbol_at_put(_index, name);
2095
2096 // We need to save the mirrors in the backtrace to keep the class
2097 // from being unloaded while we still have this stack trace.
2098 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2099 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2100 _index++;
2101 }
2102
2103 };
2104
2105 struct BacktraceElement : public StackObj {
2106 int _method_id;
2107 int _bci;
2108 int _version;
2109 Symbol* _name;
2110 Handle _mirror;
2111 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2112 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2113 };
2114
2115 class BacktraceIterator : public StackObj {
2116 int _index;
2117 objArrayHandle _result;
2118 objArrayHandle _mirrors;
2119 typeArrayHandle _methods;
2120 typeArrayHandle _bcis;
2121 typeArrayHandle _names;
2122
2123 void init(objArrayHandle result, Thread* thread) {
2124 // Get method id, bci, version and mirror from chunk
2125 _result = result;
2126 if (_result.not_null()) {
2127 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2128 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2129 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2130 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2131 _index = 0;
2132 }
2133 }
2134 public:
2135 BacktraceIterator(objArrayHandle result, Thread* thread) {
2136 init(result, thread);
2137 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2138 }
2139
2140 BacktraceElement next(Thread* thread) {
2141 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2142 _methods->ushort_at(_index),
2143 Backtrace::version_at(_bcis->int_at(_index)),
2144 Backtrace::bci_at(_bcis->int_at(_index)),
2145 _names->symbol_at(_index));
2146 _index++;
2147
2148 if (_index >= java_lang_Throwable::trace_chunk_size) {
2149 int next_offset = java_lang_Throwable::trace_next_offset;
2150 // Get next chunk
2151 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2152 init(result, thread);
2153 }
2154 return e;
2155 }
2156
2157 bool repeat() {
2158 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2159 }
2160 };
2161
2162
2163 // Print stack trace element to resource allocated buffer
2164 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2165 int version, int bci, Symbol* name) {
2166 ResourceMark rm;
2167
2168 // Get strings and string lengths
2169 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2170 const char* klass_name = holder->external_name();
2171 int buf_len = (int)strlen(klass_name);
2172
2173 char* method_name = name->as_C_string();
2174 buf_len += (int)strlen(method_name);
2175
2176 char* source_file_name = NULL;
2177 Symbol* source = Backtrace::get_source_file_name(holder, version);
2178 if (source != NULL) {
2179 source_file_name = source->as_C_string();
2180 buf_len += (int)strlen(source_file_name);
2181 }
2182
2183 char *module_name = NULL, *module_version = NULL;
2184 ModuleEntry* module = holder->module();
2185 if (module->is_named()) {
2186 module_name = module->name()->as_C_string();
2187 buf_len += (int)strlen(module_name);
2188 if (module->version() != NULL) {
2189 module_version = module->version()->as_C_string();
2190 buf_len += (int)strlen(module_version);
2191 }
2192 }
2193
2194 // Allocate temporary buffer with extra space for formatting and line number
2195 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2196
2197 // Print stack trace line in buffer
2198 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2199
2200 // Print module information
2201 if (module_name != NULL) {
2202 if (module_version != NULL) {
2203 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2204 } else {
2205 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2206 }
2207 }
2208
2209 // The method can be NULL if the requested class version is gone
2210 Method* method = holder->method_with_orig_idnum(method_id, version);
2211 if (!version_matches(method, version)) {
2212 strcat(buf, "Redefined)");
2213 } else {
2214 int line_number = Backtrace::get_line_number(method, bci);
2215 if (line_number == -2) {
2216 strcat(buf, "Native Method)");
2217 } else {
2218 if (source_file_name != NULL && (line_number != -1)) {
2219 // Sourcename and linenumber
2220 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2221 } else if (source_file_name != NULL) {
2222 // Just sourcename
2223 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2224 } else {
2225 // Neither sourcename nor linenumber
2226 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2227 }
2228 CompiledMethod* nm = method->code();
2229 if (WizardMode && nm != NULL) {
2230 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2231 }
2232 }
2233 }
2234
2235 st->print_cr("%s", buf);
2236 }
2237
2238 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2239 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2240 int method_id = method->orig_method_idnum();
2241 int version = method->constants()->version();
2242 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2243 }
2244
2245 /**
2246 * Print the throwable message and its stack trace plus all causes by walking the
2247 * cause chain. The output looks the same as of Throwable.printStackTrace().
2248 */
2249 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2250 // First, print the message.
2251 print(throwable(), st);
2252 st->cr();
2253
2254 // Now print the stack trace.
2255 Thread* THREAD = Thread::current();
2256 while (throwable.not_null()) {
2257 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2258 if (result.is_null()) {
2259 st->print_raw_cr("\t<<no stack trace available>>");
2260 return;
2261 }
2262 BacktraceIterator iter(result, THREAD);
2263
2264 while (iter.repeat()) {
2265 BacktraceElement bte = iter.next(THREAD);
2266 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2267 }
2268 {
2269 // Call getCause() which doesn't necessarily return the _cause field.
2270 EXCEPTION_MARK;
2271 JavaValue cause(T_OBJECT);
2272 JavaCalls::call_virtual(&cause,
2273 throwable,
2274 throwable->klass(),
2275 vmSymbols::getCause_name(),
2276 vmSymbols::void_throwable_signature(),
2277 THREAD);
2278 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2279 if (HAS_PENDING_EXCEPTION) {
2280 CLEAR_PENDING_EXCEPTION;
2281 throwable = Handle();
2282 } else {
2283 throwable = Handle(THREAD, (oop) cause.get_jobject());
2284 if (throwable.not_null()) {
2285 st->print("Caused by: ");
2286 print(throwable(), st);
2287 st->cr();
2288 }
2289 }
2290 }
2291 }
2292 }
2293
2294 /**
2295 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2296 */
2297 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2298 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2299 JavaValue result(T_VOID);
2300 JavaCalls::call_virtual(&result,
2301 throwable,
2302 SystemDictionary::Throwable_klass(),
2303 vmSymbols::printStackTrace_name(),
2304 vmSymbols::void_method_signature(),
2305 THREAD);
2306 }
2307
2308 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2309 if (!StackTraceInThrowable) return;
2310 ResourceMark rm(THREAD);
2311
2312 // Start out by clearing the backtrace for this object, in case the VM
2313 // runs out of memory while allocating the stack trace
2314 set_backtrace(throwable(), NULL);
2315 // Clear lazily constructed Java level stacktrace if refilling occurs
2316 // This is unnecessary in 1.7+ but harmless
2317 clear_stacktrace(throwable());
2318
2319 int max_depth = MaxJavaStackTraceDepth;
2320 JavaThread* thread = (JavaThread*)THREAD;
2321
2322 BacktraceBuilder bt(CHECK);
2323
2324 // If there is no Java frame just return the method that was being called
2325 // with bci 0
2326 if (!thread->has_last_Java_frame()) {
2327 if (max_depth >= 1 && method() != NULL) {
2328 bt.push(method(), 0, CHECK);
2329 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2330 set_depth(throwable(), 1);
2331 set_backtrace(throwable(), bt.backtrace());
2332 }
2333 return;
2334 }
2335
2336 // Instead of using vframe directly, this version of fill_in_stack_trace
2337 // basically handles everything by hand. This significantly improved the
2338 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2339 // See bug 6333838 for more details.
2340 // The "ASSERT" here is to verify this method generates the exactly same stack
2341 // trace as utilizing vframe.
2342 #ifdef ASSERT
2343 vframeStream st(thread);
2344 methodHandle st_method(THREAD, st.method());
2345 #endif
2346 int total_count = 0;
2347 RegisterMap map(thread, false);
2348 int decode_offset = 0;
2349 CompiledMethod* nm = NULL;
2350 bool skip_fillInStackTrace_check = false;
2351 bool skip_throwableInit_check = false;
2352 bool skip_hidden = !ShowHiddenFrames;
2353
2354 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2355 Method* method = NULL;
2356 int bci = 0;
2357
2358 // Compiled java method case.
2359 if (decode_offset != 0) {
2360 DebugInfoReadStream stream(nm, decode_offset);
2361 decode_offset = stream.read_int();
2362 method = (Method*)nm->metadata_at(stream.read_int());
2363 bci = stream.read_bci();
2364 } else {
2365 if (fr.is_first_frame()) break;
2366 address pc = fr.pc();
2367 if (fr.is_interpreted_frame()) {
2368 address bcp = fr.interpreter_frame_bcp();
2369 method = fr.interpreter_frame_method();
2370 bci = method->bci_from(bcp);
2371 fr = fr.sender(&map);
2372 } else {
2373 CodeBlob* cb = fr.cb();
2374 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2375 // but non nmethod
2376 fr = fr.sender(&map);
2377 if (cb == NULL || !cb->is_compiled()) {
2378 continue;
2379 }
2380 nm = cb->as_compiled_method();
2381 if (nm->method()->is_native()) {
2382 method = nm->method();
2383 bci = 0;
2384 } else {
2385 PcDesc* pd = nm->pc_desc_at(pc);
2386 decode_offset = pd->scope_decode_offset();
2387 // if decode_offset is not equal to 0, it will execute the
2388 // "compiled java method case" at the beginning of the loop.
2389 continue;
2390 }
2391 }
2392 }
2393 #ifdef ASSERT
2394 assert(st_method() == method && st.bci() == bci,
2395 "Wrong stack trace");
2396 st.next();
2397 // vframeStream::method isn't GC-safe so store off a copy
2398 // of the Method* in case we GC.
2399 if (!st.at_end()) {
2400 st_method = st.method();
2401 }
2402 #endif
2403
2404 // the format of the stacktrace will be:
2405 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2406 // - 0 or more <init> methods for the exception class (skipped)
2407 // - rest of the stack
2408
2409 if (!skip_fillInStackTrace_check) {
2410 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2411 throwable->is_a(method->method_holder())) {
2412 continue;
2413 }
2414 else {
2415 skip_fillInStackTrace_check = true; // gone past them all
2416 }
2417 }
2418 if (!skip_throwableInit_check) {
2419 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2420
2421 // skip <init> methods of the exception class and superclasses
2422 // This is simlar to classic VM.
2423 if (method->name() == vmSymbols::object_initializer_name() &&
2424 throwable->is_a(method->method_holder())) {
2425 continue;
2426 } else {
2427 // there are none or we've seen them all - either way stop checking
2428 skip_throwableInit_check = true;
2429 }
2430 }
2431 if (method->is_hidden()) {
2432 if (skip_hidden) continue;
2433 }
2434 bt.push(method, bci, CHECK);
2435 total_count++;
2436 }
2437
2438 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2439
2440 // Put completed stack trace into throwable object
2441 set_backtrace(throwable(), bt.backtrace());
2442 set_depth(throwable(), total_count);
2443 }
2444
2445 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2446 // No-op if stack trace is disabled
2447 if (!StackTraceInThrowable) {
2448 return;
2449 }
2450
2451 // Disable stack traces for some preallocated out of memory errors
2452 if (!Universe::should_fill_in_stack_trace(throwable)) {
2453 return;
2454 }
2455
2456 PRESERVE_EXCEPTION_MARK;
2457
2458 JavaThread* thread = JavaThread::active();
2459 fill_in_stack_trace(throwable, method, thread);
2460 // ignore exceptions thrown during stack trace filling
2461 CLEAR_PENDING_EXCEPTION;
2462 }
2463
2464 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2465 // Allocate stack trace - backtrace is created but not filled in
2466
2467 // No-op if stack trace is disabled
2468 if (!StackTraceInThrowable) return;
2469 BacktraceBuilder bt(CHECK); // creates a backtrace
2470 set_backtrace(throwable(), bt.backtrace());
2471 }
2472
2473
2474 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2475 // Fill in stack trace into preallocated backtrace (no GC)
2476
2477 // No-op if stack trace is disabled
2478 if (!StackTraceInThrowable) return;
2479
2480 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2481
2482 JavaThread* THREAD = JavaThread::current();
2483
2484 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2485 assert(backtrace.not_null(), "backtrace should have been preallocated");
2486
2487 ResourceMark rm(THREAD);
2488 vframeStream st(THREAD);
2489
2490 BacktraceBuilder bt(THREAD, backtrace);
2491
2492 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2493 // methods as preallocated errors aren't created by "java" code.
2494
2495 // fill in as much stack trace as possible
2496 int chunk_count = 0;
2497 for (;!st.at_end(); st.next()) {
2498 bt.push(st.method(), st.bci(), CHECK);
2499 chunk_count++;
2500
2501 // Bail-out for deep stacks
2502 if (chunk_count >= trace_chunk_size) break;
2503 }
2504 set_depth(throwable(), chunk_count);
2505 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2506
2507 // We support the Throwable immutability protocol defined for Java 7.
2508 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2509 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2510 }
2511
2512 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2513 objArrayHandle stack_trace_array_h, TRAPS) {
2514
2515 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2516 THROW(vmSymbols::java_lang_NullPointerException());
2517 }
2518
2519 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2520
2521 if (stack_trace_array_h->length() != depth(throwable())) {
2522 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2523 }
2524
2525 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2526 BacktraceIterator iter(result, THREAD);
2527
2528 int index = 0;
2529 while (iter.repeat()) {
2530 BacktraceElement bte = iter.next(THREAD);
2531
2532 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2533
2534 if (stack_trace_element.is_null()) {
2535 THROW(vmSymbols::java_lang_NullPointerException());
2536 }
2537
2538 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2539 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2540
2541 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2542 method,
2543 bte._version,
2544 bte._bci,
2545 bte._name, CHECK);
2546 }
2547 }
2548
2549 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2550 // Allocate java.lang.StackTraceElement instance
2551 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2552 assert(k != NULL, "must be loaded in 1.4+");
2553 if (k->should_be_initialized()) {
2554 k->initialize(CHECK_0);
2555 }
2556
2557 Handle element = k->allocate_instance_handle(CHECK_0);
2558
2559 int version = method->constants()->version();
2560 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2561 return element();
2562 }
2563
2564 void java_lang_StackTraceElement::fill_in(Handle element,
2565 InstanceKlass* holder, const methodHandle& method,
2566 int version, int bci, Symbol* name, TRAPS) {
2567 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2568
2569 // Fill in class name
2570 ResourceMark rm(THREAD);
2571 const char* str = holder->external_name();
2572 oop classname = StringTable::intern((char*) str, CHECK);
2573 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2574 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2575
2576 oop loader = holder->class_loader();
2577 if (loader != NULL) {
2578 oop loader_name = java_lang_ClassLoader::name(loader);
2579 if (loader_name != NULL)
2580 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2581 }
2582
2583 // Fill in method name
2584 oop methodname = StringTable::intern(name, CHECK);
2585 java_lang_StackTraceElement::set_methodName(element(), methodname);
2586
2587 // Fill in module name and version
2588 ModuleEntry* module = holder->module();
2589 if (module->is_named()) {
2590 oop module_name = StringTable::intern(module->name(), CHECK);
2591 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2592 oop module_version;
2593 if (module->version() != NULL) {
2594 module_version = StringTable::intern(module->version(), CHECK);
2595 } else {
2596 module_version = NULL;
2597 }
2598 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2599 }
2600
2601 if (method() == NULL || !version_matches(method(), version)) {
2602 // The method was redefined, accurate line number information isn't available
2603 java_lang_StackTraceElement::set_fileName(element(), NULL);
2604 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2605 } else {
2606 // Fill in source file name and line number.
2607 Symbol* source = Backtrace::get_source_file_name(holder, version);
2608 if (ShowHiddenFrames && source == NULL)
2609 source = vmSymbols::unknown_class_name();
2610 oop filename = StringTable::intern(source, CHECK);
2611 java_lang_StackTraceElement::set_fileName(element(), filename);
2612
2613 int line_number = Backtrace::get_line_number(method, bci);
2614 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2615 }
2616 }
2617
2618 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2619 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2620 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2621 // we should expand MemberName::name when Throwable uses StackTrace
2622 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2623 return method;
2624 }
2625
2626 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2627 // set Method* or mid/cpref
2628 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2629 InstanceKlass* ik = method->method_holder();
2630 CallInfo info(method(), ik, CHECK);
2631 MethodHandles::init_method_MemberName(mname, info);
2632 // set bci
2633 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2634 // method may be redefined; store the version
2635 int version = method->constants()->version();
2636 assert((jushort)version == version, "version should be short");
2637 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2638 }
2639
2640 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2641 ResourceMark rm(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(oop call_site) {
3734 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3735
3736 oop dep_oop = call_site->obj_field(_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
3744 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3745 InstanceKlass* k = SystemDictionary::Context_klass();
3746 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3747 }
3748
3749 #if INCLUDE_CDS
3750 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3751 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3752 }
3753 #endif
3754
3755 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3756 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3757 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3758 DependencyContext dep_ctx(vmdeps_addr);
3759 return dep_ctx;
3760 }
3761
3762 // Support for java_security_AccessControlContext
3763
3764 int java_security_AccessControlContext::_context_offset = 0;
3765 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3766 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3767 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3768
3769 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3770 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3771 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3772 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3773 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3774
3775 void java_security_AccessControlContext::compute_offsets() {
3776 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3777 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3778 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3779 }
3780
3781 #if INCLUDE_CDS
3782 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3783 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3784 }
3785 #endif
3786
3787 bool java_security_AccessControlContext::is_authorized(Handle context) {
3788 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3789 assert(_isAuthorized_offset != -1, "should be set");
3790 return context->bool_field(_isAuthorized_offset) != 0;
3791 }
3792
3793 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3794 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3795 // Ensure klass is initialized
3796 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3797 // Allocate result
3798 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3799 // Fill in values
3800 result->obj_field_put(_context_offset, context());
3801 result->obj_field_put(_privilegedContext_offset, privileged_context());
3802 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3803 // whitelist AccessControlContexts created by the JVM if present
3804 if (_isAuthorized_offset != -1) {
3805 result->bool_field_put(_isAuthorized_offset, true);
3806 }
3807 return result;
3808 }
3809
3810
3811 // Support for java_lang_ClassLoader
3812
3813 bool java_lang_ClassLoader::offsets_computed = false;
3814 int java_lang_ClassLoader::_loader_data_offset = -1;
3815 int java_lang_ClassLoader::parallelCapable_offset = -1;
3816 int java_lang_ClassLoader::name_offset = -1;
3817 int java_lang_ClassLoader::nameAndId_offset = -1;
3818 int java_lang_ClassLoader::unnamedModule_offset = -1;
3819
3820 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3821 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3822 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3823 }
3824
3825 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3826 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3827 return RawAccess<>::load_at(loader, _loader_data_offset);
3828 }
3829
3830 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3831 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3832 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3833 }
3834
3835 #define CLASSLOADER_FIELDS_DO(macro) \
3836 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3837 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3838 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3839 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3840 macro(parent_offset, k1, "parent", classloader_signature, false)
3841
3842 void java_lang_ClassLoader::compute_offsets() {
3843 assert(!offsets_computed, "offsets should be initialized only once");
3844 offsets_computed = true;
3845
3846 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3847 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3848
3849 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3850 }
3851
3852 #if INCLUDE_CDS
3853 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3854 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3855 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3856 }
3857 #endif
3858
3859 oop java_lang_ClassLoader::parent(oop loader) {
3860 assert(is_instance(loader), "loader must be oop");
3861 return loader->obj_field(parent_offset);
3862 }
3863
3864 // Returns the name field of this class loader. If the name field has not
3865 // been set, null will be returned.
3866 oop java_lang_ClassLoader::name(oop loader) {
3867 assert(is_instance(loader), "loader must be oop");
3868 return loader->obj_field(name_offset);
3869 }
3870
3871 // Returns the nameAndId field of this class loader. The format is
3872 // as follows:
3873 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3874 // If the defining loader has no name then <qualified-class-name> @<id>
3875 // If built-in loader, then omit '@<id>' as there is only one instance.
3876 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3877 oop java_lang_ClassLoader::nameAndId(oop loader) {
3878 assert(is_instance(loader), "loader must be oop");
3879 return loader->obj_field(nameAndId_offset);
3880 }
3881
3882 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3883 assert(is_instance(loader), "loader must be oop");
3884 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3885 oop acl = loader;
3886 debug_only(jint loop_count = 0);
3887 // This loop taken verbatim from ClassLoader.java:
3888 do {
3889 acl = parent(acl);
3890 if (oopDesc::equals(cl, acl)) {
3891 return true;
3892 }
3893 assert(++loop_count > 0, "loop_count overflow");
3894 } while (acl != NULL);
3895 return false;
3896 }
3897
3898 bool java_lang_ClassLoader::is_instance(oop obj) {
3899 return obj != NULL && is_subclass(obj->klass());
3900 }
3901
3902
3903 // For class loader classes, parallelCapable defined
3904 // based on non-null field
3905 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3906 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3907 if (parallelCapable_offset == -1) {
3908 // Default for backward compatibility is false
3909 return false;
3910 }
3911 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3912 }
3913
3914 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3915 // Fix for 4474172; see evaluation for more details
3916 loader = non_reflection_class_loader(loader);
3917
3918 oop cl = SystemDictionary::java_system_loader();
3919 while(cl != NULL) {
3920 if (oopDesc::equals(cl, loader)) return true;
3921 cl = parent(cl);
3922 }
3923 return false;
3924 }
3925
3926 // Return true if this is one of the class loaders associated with
3927 // the generated bytecodes for reflection.
3928 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3929 if (loader != NULL) {
3930 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3931 // This might be null in non-1.4 JDKs
3932 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3933 }
3934 return false;
3935 }
3936
3937 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3938 // See whether this is one of the class loaders associated with
3939 // the generated bytecodes for reflection, and if so, "magically"
3940 // delegate to its parent to prevent class loading from occurring
3941 // in places where applications using reflection didn't expect it.
3942 if (is_reflection_class_loader(loader)) {
3943 return parent(loader);
3944 }
3945 return loader;
3946 }
3947
3948 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3949 assert(is_instance(loader), "loader must be oop");
3950 return loader->obj_field(unnamedModule_offset);
3951 }
3952
3953 // Support for java_lang_System
3954 //
3955 #define SYSTEM_FIELDS_DO(macro) \
3956 macro(static_in_offset, k, "in", input_stream_signature, true); \
3957 macro(static_out_offset, k, "out", print_stream_signature, true); \
3958 macro(static_err_offset, k, "err", print_stream_signature, true); \
3959 macro(static_security_offset, k, "security", security_manager_signature, true)
3960
3961 void java_lang_System::compute_offsets() {
3962 InstanceKlass* k = SystemDictionary::System_klass();
3963 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3964 }
3965
3966 #if INCLUDE_CDS
3967 void java_lang_System::serialize_offsets(SerializeClosure* f) {
3968 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3969 }
3970 #endif
3971
3972 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3973 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
3974 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
3975
3976
3977 bool java_lang_System::has_security_manager() {
3978 InstanceKlass* ik = SystemDictionary::System_klass();
3979 oop base = ik->static_field_base_raw();
3980 return base->obj_field(static_security_offset) != NULL;
3981 }
3982
3983 int java_lang_Class::_klass_offset;
3984 int java_lang_Class::_array_klass_offset;
3985 int java_lang_Class::_oop_size_offset;
3986 int java_lang_Class::_static_oop_field_count_offset;
3987 int java_lang_Class::_class_loader_offset;
3988 int java_lang_Class::_module_offset;
3989 int java_lang_Class::_protection_domain_offset;
3990 int java_lang_Class::_component_mirror_offset;
3991 int java_lang_Class::_init_lock_offset;
3992 int java_lang_Class::_signers_offset;
3993 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3994 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3995 int java_lang_Throwable::backtrace_offset;
3996 int java_lang_Throwable::detailMessage_offset;
3997 int java_lang_Throwable::stackTrace_offset;
3998 int java_lang_Throwable::depth_offset;
3999 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4000 int java_lang_reflect_AccessibleObject::override_offset;
4001 int java_lang_reflect_Method::clazz_offset;
4002 int java_lang_reflect_Method::name_offset;
4003 int java_lang_reflect_Method::returnType_offset;
4004 int java_lang_reflect_Method::parameterTypes_offset;
4005 int java_lang_reflect_Method::exceptionTypes_offset;
4006 int java_lang_reflect_Method::slot_offset;
4007 int java_lang_reflect_Method::modifiers_offset;
4008 int java_lang_reflect_Method::signature_offset;
4009 int java_lang_reflect_Method::annotations_offset;
4010 int java_lang_reflect_Method::parameter_annotations_offset;
4011 int java_lang_reflect_Method::annotation_default_offset;
4012 int java_lang_reflect_Constructor::clazz_offset;
4013 int java_lang_reflect_Constructor::parameterTypes_offset;
4014 int java_lang_reflect_Constructor::exceptionTypes_offset;
4015 int java_lang_reflect_Constructor::slot_offset;
4016 int java_lang_reflect_Constructor::modifiers_offset;
4017 int java_lang_reflect_Constructor::signature_offset;
4018 int java_lang_reflect_Constructor::annotations_offset;
4019 int java_lang_reflect_Constructor::parameter_annotations_offset;
4020 int java_lang_reflect_Field::clazz_offset;
4021 int java_lang_reflect_Field::name_offset;
4022 int java_lang_reflect_Field::type_offset;
4023 int java_lang_reflect_Field::slot_offset;
4024 int java_lang_reflect_Field::modifiers_offset;
4025 int java_lang_reflect_Field::signature_offset;
4026 int java_lang_reflect_Field::annotations_offset;
4027 int java_lang_reflect_Parameter::name_offset;
4028 int java_lang_reflect_Parameter::modifiers_offset;
4029 int java_lang_reflect_Parameter::index_offset;
4030 int java_lang_reflect_Parameter::executable_offset;
4031 int java_lang_boxing_object::value_offset;
4032 int java_lang_boxing_object::long_value_offset;
4033 int java_lang_ref_Reference::referent_offset;
4034 int java_lang_ref_Reference::queue_offset;
4035 int java_lang_ref_Reference::next_offset;
4036 int java_lang_ref_Reference::discovered_offset;
4037 int java_lang_ref_SoftReference::timestamp_offset;
4038 int java_lang_ref_SoftReference::static_clock_offset;
4039 int java_lang_ClassLoader::parent_offset;
4040 int java_lang_System::static_in_offset;
4041 int java_lang_System::static_out_offset;
4042 int java_lang_System::static_err_offset;
4043 int java_lang_System::static_security_offset;
4044 int java_lang_StackTraceElement::methodName_offset;
4045 int java_lang_StackTraceElement::fileName_offset;
4046 int java_lang_StackTraceElement::lineNumber_offset;
4047 int java_lang_StackTraceElement::moduleName_offset;
4048 int java_lang_StackTraceElement::moduleVersion_offset;
4049 int java_lang_StackTraceElement::classLoaderName_offset;
4050 int java_lang_StackTraceElement::declaringClass_offset;
4051 int java_lang_StackTraceElement::declaringClassObject_offset;
4052 int java_lang_StackFrameInfo::_memberName_offset;
4053 int java_lang_StackFrameInfo::_bci_offset;
4054 int java_lang_StackFrameInfo::_version_offset;
4055 int java_lang_LiveStackFrameInfo::_monitors_offset;
4056 int java_lang_LiveStackFrameInfo::_locals_offset;
4057 int java_lang_LiveStackFrameInfo::_operands_offset;
4058 int java_lang_LiveStackFrameInfo::_mode_offset;
4059 int java_lang_AssertionStatusDirectives::classes_offset;
4060 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4061 int java_lang_AssertionStatusDirectives::packages_offset;
4062 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4063 int java_lang_AssertionStatusDirectives::deflt_offset;
4064 int java_nio_Buffer::_limit_offset;
4065 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4066 int reflect_ConstantPool::_oop_offset;
4067 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4068
4069
4070 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4071 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4072 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4073 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4074 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4075 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4076 macro(methodName_offset, k, "methodName", string_signature, false); \
4077 macro(fileName_offset, k, "fileName", string_signature, false); \
4078 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4079
4080 // Support for java_lang_StackTraceElement
4081 void java_lang_StackTraceElement::compute_offsets() {
4082 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4083 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4084 }
4085
4086 #if INCLUDE_CDS
4087 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4088 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4089 }
4090 #endif
4091
4092 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4093 element->obj_field_put(fileName_offset, value);
4094 }
4095
4096 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4097 element->obj_field_put(declaringClass_offset, value);
4098 }
4099
4100 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4101 element->obj_field_put(methodName_offset, value);
4102 }
4103
4104 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4105 element->int_field_put(lineNumber_offset, value);
4106 }
4107
4108 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4109 element->obj_field_put(moduleName_offset, value);
4110 }
4111
4112 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4113 element->obj_field_put(moduleVersion_offset, value);
4114 }
4115
4116 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4117 element->obj_field_put(classLoaderName_offset, value);
4118 }
4119
4120 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4121 element->obj_field_put(declaringClassObject_offset, value);
4122 }
4123
4124 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4125 element->short_field_put(_version_offset, value);
4126 }
4127
4128 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4129 element->int_field_put(_bci_offset, value);
4130 }
4131
4132 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4133 element->obj_field_put(_monitors_offset, value);
4134 }
4135
4136 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4137 element->obj_field_put(_locals_offset, value);
4138 }
4139
4140 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4141 element->obj_field_put(_operands_offset, value);
4142 }
4143
4144 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4145 element->int_field_put(_mode_offset, value);
4146 }
4147
4148 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4149 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4150 macro(classes_offset, k, "classes", string_array_signature, false); \
4151 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4152 macro(packages_offset, k, "packages", string_array_signature, false); \
4153 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4154 macro(deflt_offset, k, "deflt", bool_signature, false)
4155
4156 void java_lang_AssertionStatusDirectives::compute_offsets() {
4157 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4158 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4159 }
4160
4161 #if INCLUDE_CDS
4162 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4163 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4164 }
4165 #endif
4166
4167 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4168 o->obj_field_put(classes_offset, val);
4169 }
4170
4171 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4172 o->obj_field_put(classEnabled_offset, val);
4173 }
4174
4175 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4176 o->obj_field_put(packages_offset, val);
4177 }
4178
4179 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4180 o->obj_field_put(packageEnabled_offset, val);
4181 }
4182
4183 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4184 o->bool_field_put(deflt_offset, val);
4185 }
4186
4187
4188 // Support for intrinsification of java.nio.Buffer.checkIndex
4189 int java_nio_Buffer::limit_offset() {
4190 return _limit_offset;
4191 }
4192
4193 #define BUFFER_FIELDS_DO(macro) \
4194 macro(_limit_offset, k, "limit", int_signature, false)
4195
4196 void java_nio_Buffer::compute_offsets() {
4197 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4198 assert(k != NULL, "must be loaded in 1.4+");
4199 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4200 }
4201
4202 #if INCLUDE_CDS
4203 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4204 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4205 }
4206 #endif
4207
4208 #define AOS_FIELDS_DO(macro) \
4209 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4210
4211 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4212 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4213 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4214 }
4215
4216 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4217 assert(_owner_offset != 0, "Must be initialized");
4218 return obj->obj_field(_owner_offset);
4219 }
4220
4221 #if INCLUDE_CDS
4222 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4223 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4224 }
4225 #endif
4226
4227 static int member_offset(int hardcoded_offset) {
4228 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4229 }
4230
4231 // Compute hard-coded offsets
4232 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4233 // are not available to determine the offset_of_static_fields.
4234 void JavaClasses::compute_hard_coded_offsets() {
4235
4236 // java_lang_boxing_object
4237 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4238 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4239
4240 // java_lang_ref_Reference
4241 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4242 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4243 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4244 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4245 }
4246
4247 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4248
4249 // Compute non-hard-coded field offsets of all the classes in this file
4250 void JavaClasses::compute_offsets() {
4251 if (UseSharedSpaces) {
4252 return; // field offsets are loaded from archive
4253 }
4254
4255 // We have already called the compute_offsets() of the
4256 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4257 // earlier inside SystemDictionary::resolve_preloaded_classes()
4258 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4259
4260 // generated interpreter code wants to know about the offsets we just computed:
4261 AbstractAssembler::update_delayed_values();
4262 }
4263
4264 #if INCLUDE_CDS
4265 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4266
4267 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4268 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4269 }
4270 #endif
4271
4272
4273 #ifndef PRODUCT
4274
4275 // These functions exist to assert the validity of hard-coded field offsets to guard
4276 // against changes in the class files
4277
4278 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4279 EXCEPTION_MARK;
4280 fieldDescriptor fd;
4281 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
4282 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4283 InstanceKlass* ik = InstanceKlass::cast(k);
4284 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
4285 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
4286 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4287 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4288 return false;
4289 }
4290 if (fd.is_static()) {
4291 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4292 return false;
4293 }
4294 if (fd.offset() == hardcoded_offset ) {
4295 return true;
4296 } else {
4297 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4298 klass_name, field_name, hardcoded_offset, fd.offset());
4299 return false;
4300 }
4301 }
4302
4303 // Check the hard-coded field offsets of all the classes in this file
4304
4305 void JavaClasses::check_offsets() {
4306 bool valid = true;
4307
4308 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4309 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4310
4311 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4312 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4313
4314 // Boxed primitive objects (java_lang_boxing_object)
4315
4316 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4317 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4318 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4319 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4320 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4321 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4322 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4323 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4324
4325 // java.lang.ref.Reference
4326
4327 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4328 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4329 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4330 // Fake field
4331 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4332
4333 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4334 }
4335
4336 #endif // PRODUCT
4337
4338 int InjectedField::compute_offset() {
4339 InstanceKlass* ik = InstanceKlass::cast(klass());
4340 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4341 if (!may_be_java && !fs.access_flags().is_internal()) {
4342 // Only look at injected fields
4343 continue;
4344 }
4345 if (fs.name() == name() && fs.signature() == signature()) {
4346 return fs.offset();
4347 }
4348 }
4349 ResourceMark rm;
4350 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)" : "");
4351 #ifndef PRODUCT
4352 ik->print();
4353 tty->print_cr("all fields:");
4354 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4355 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4356 }
4357 #endif //PRODUCT
4358 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
4359 return -1;
4360 }
4361
4362 void javaClasses_init() {
4363 JavaClasses::compute_offsets();
4364 JavaClasses::check_offsets();
4365 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4366 }