1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "classfile/vmSymbols.hpp"
33 #include "code/debugInfo.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/pcDesc.hpp"
36 #include "interpreter/interpreter.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/heapShared.inline.hpp"
41 #include "memory/metaspaceShared.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/fieldStreams.hpp"
46 #include "oops/instanceKlass.hpp"
47 #include "oops/instanceMirrorKlass.hpp"
48 #include "oops/klass.hpp"
49 #include "oops/method.inline.hpp"
50 #include "oops/objArrayOop.inline.hpp"
51 #include "oops/oop.inline.hpp"
52 #include "oops/symbol.hpp"
53 #include "oops/typeArrayOop.inline.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "prims/resolvedMethodTable.hpp"
56 #include "runtime/fieldDescriptor.inline.hpp"
57 #include "runtime/frame.inline.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/interfaceSupport.inline.hpp"
60 #include "runtime/java.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jniHandles.inline.hpp"
63 #include "runtime/safepoint.hpp"
64 #include "runtime/safepointVerifiers.hpp"
65 #include "runtime/thread.inline.hpp"
66 #include "runtime/vframe.inline.hpp"
67 #include "runtime/vm_version.hpp"
68 #include "utilities/align.hpp"
69 #include "utilities/preserveException.hpp"
70 #include "utilities/utf8.hpp"
71 #if INCLUDE_JVMCI
72 #include "jvmci/jvmciJavaClasses.hpp"
73 #endif
74
75 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
76 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
77
78 #if INCLUDE_CDS
79 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
80 f->do_u4((u4*)&_##name##_offset);
81 #endif
82
83 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
84 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
85
86 InjectedField JavaClasses::_injected_fields[] = {
87 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
88 };
89
90 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
91 return _injected_fields[id].compute_offset();
92 }
93
94 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
95 *field_count = 0;
96
97 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
98 if (sid == vmSymbols::NO_SID) {
99 // Only well known classes can inject fields
100 return NULL;
101 }
102
103 int count = 0;
104 int start = -1;
105
106 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
107 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
108 count++; \
109 if (start == -1) start = klass##_##name##_enum; \
110 }
111 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
112 #undef LOOKUP_INJECTED_FIELD
113
114 if (start != -1) {
115 *field_count = count;
116 return _injected_fields + start;
117 }
118 return NULL;
119 }
120
121
122 // Helpful routine for computing field offsets at run time rather than hardcoding them
123 // Finds local fields only, including static fields. Static field offsets are from the
124 // beginning of the mirror.
125 static void compute_offset(int &dest_offset,
126 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
127 bool is_static = false) {
128 fieldDescriptor fd;
129 if (ik == NULL) {
130 ResourceMark rm;
131 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
132 vm_exit_during_initialization("Invalid layout of well-known class");
133 }
134
135 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
136 ResourceMark rm;
137 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
138 name_symbol->as_C_string(), signature_symbol->as_C_string());
139 #ifndef PRODUCT
140 // Prints all fields and offsets
141 Log(class) lt;
142 LogStream ls(lt.error());
143 ik->print_on(&ls);
144 #endif //PRODUCT
145 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
146 }
147 dest_offset = fd.offset();
148 }
149
150 // Overloading to pass name as a string.
151 static void compute_offset(int& dest_offset, InstanceKlass* ik,
152 const char* name_string, Symbol* signature_symbol,
153 bool is_static = false) {
154 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
155 if (name == NULL) {
156 ResourceMark rm;
157 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
158 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
159 }
160 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
161 }
162
163 int java_lang_String::value_offset = 0;
164 int java_lang_String::hash_offset = 0;
165 int java_lang_String::hashIsZero_offset = 0;
166 int java_lang_String::coder_offset = 0;
167
168 bool java_lang_String::initialized = false;
169
170 bool java_lang_String::is_instance(oop obj) {
171 return is_instance_inlined(obj);
172 }
173
174 #if INCLUDE_CDS
175 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
176 f->do_u4((u4*)&offset)
177 #endif
178
179 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
180 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
181
182 #define STRING_FIELDS_DO(macro) \
183 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
184 macro(hash_offset, k, "hash", int_signature, false); \
185 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
186 macro(coder_offset, k, "coder", byte_signature, false);
187
188 void java_lang_String::compute_offsets() {
189 if (initialized) {
190 return;
191 }
192
193 InstanceKlass* k = SystemDictionary::String_klass();
194 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
195
196 initialized = true;
197 }
198
199 #if INCLUDE_CDS
200 void java_lang_String::serialize_offsets(SerializeClosure* f) {
201 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
202 f->do_bool(&initialized);
203 }
204 #endif
205
206 class CompactStringsFixup : public FieldClosure {
207 private:
208 bool _value;
209
210 public:
211 CompactStringsFixup(bool value) : _value(value) {}
212
213 void do_field(fieldDescriptor* fd) {
214 if (fd->name() == vmSymbols::compact_strings_name()) {
215 oop mirror = fd->field_holder()->java_mirror();
216 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
217 assert(mirror != NULL, "String must have mirror already");
218 mirror->bool_field_put(fd->offset(), _value);
219 }
220 }
221 };
222
223 void java_lang_String::set_compact_strings(bool value) {
224 CompactStringsFixup fix(value);
225 SystemDictionary::String_klass()->do_local_static_fields(&fix);
226 }
227
228 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
229 assert(initialized, "Must be initialized");
230 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
231
232 // Create the String object first, so there's a chance that the String
233 // and the char array it points to end up in the same cache line.
234 oop obj;
235 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
236
237 // Create the char array. The String object must be handlized here
238 // because GC can happen as a result of the allocation attempt.
239 Handle h_obj(THREAD, obj);
240 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
241 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
242
243 // Point the String at the char array
244 obj = h_obj();
245 set_value(obj, buffer);
246 // No need to zero the offset, allocation zero'ed the entire String object
247 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
248 return h_obj;
249 }
250
251 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
252 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
253 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
254 typeArrayOop buffer = value(h_obj());
255 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
256 if (is_latin1) {
257 for (int index = 0; index < length; index++) {
258 buffer->byte_at_put(index, (jbyte)unicode[index]);
259 }
260 } else {
261 for (int index = 0; index < length; index++) {
262 buffer->char_at_put(index, unicode[index]);
263 }
264 }
265
266 #ifdef ASSERT
267 {
268 ResourceMark rm;
269 char* expected = UNICODE::as_utf8(unicode, length);
270 char* actual = as_utf8_string(h_obj());
271 if (strcmp(expected, actual) != 0) {
272 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
273 ShouldNotReachHere();
274 }
275 }
276 #endif
277
278 return h_obj;
279 }
280
281 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
282 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
283 return h_obj();
284 }
285
286 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
287 if (utf8_str == NULL) {
288 return Handle();
289 }
290 bool has_multibyte, is_latin1;
291 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
292 if (!CompactStrings) {
293 has_multibyte = true;
294 is_latin1 = false;
295 }
296
297 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
298 if (length > 0) {
299 if (!has_multibyte) {
300 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
301 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
302 } else if (is_latin1) {
303 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
304 } else {
305 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
306 }
307 }
308
309 #ifdef ASSERT
310 // This check is too strict because the input string is not necessarily valid UTF8.
311 // For example, it may be created with arbitrary content via jni_NewStringUTF.
312 /*
313 {
314 ResourceMark rm;
315 const char* expected = utf8_str;
316 char* actual = as_utf8_string(h_obj());
317 if (strcmp(expected, actual) != 0) {
318 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
319 ShouldNotReachHere();
320 }
321 }
322 */
323 #endif
324
325 return h_obj;
326 }
327
328 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
329 Handle h_obj = create_from_str(utf8_str, CHECK_0);
330 return h_obj();
331 }
332
333 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
334 const char* utf8_str = (char*)symbol->bytes();
335 int utf8_len = symbol->utf8_length();
336
337 bool has_multibyte, is_latin1;
338 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
339 if (!CompactStrings) {
340 has_multibyte = true;
341 is_latin1 = false;
342 }
343
344 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
345 if (length > 0) {
346 if (!has_multibyte) {
347 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
348 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
349 } else if (is_latin1) {
350 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
351 } else {
352 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
353 }
354 }
355
356 #ifdef ASSERT
357 {
358 ResourceMark rm;
359 const char* expected = symbol->as_utf8();
360 char* actual = as_utf8_string(h_obj());
361 if (strncmp(expected, actual, utf8_len) != 0) {
362 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
363 ShouldNotReachHere();
364 }
365 }
366 #endif
367
368 return h_obj;
369 }
370
371 // Converts a C string to a Java String based on current encoding
372 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
373 assert(str != NULL, "bad arguments");
374
375 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
376 static to_java_string_fn_t _to_java_string_fn = NULL;
377
378 if (_to_java_string_fn == NULL) {
379 void *lib_handle = os::native_java_library();
380 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
381 if (_to_java_string_fn == NULL) {
382 fatal("NewStringPlatform missing");
383 }
384 }
385
386 jstring js = NULL;
387 { JavaThread* thread = (JavaThread*)THREAD;
388 assert(thread->is_Java_thread(), "must be java thread");
389 HandleMark hm(thread);
390 ThreadToNativeFromVM ttn(thread);
391 js = (_to_java_string_fn)(thread->jni_environment(), str);
392 }
393 return Handle(THREAD, JNIHandles::resolve(js));
394 }
395
396 // Converts a Java String to a native C string that can be used for
397 // native OS calls.
398 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
399 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
400 static to_platform_string_fn_t _to_platform_string_fn = NULL;
401
402 if (_to_platform_string_fn == NULL) {
403 void *lib_handle = os::native_java_library();
404 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
405 if (_to_platform_string_fn == NULL) {
406 fatal("GetStringPlatformChars missing");
407 }
408 }
409
410 char *native_platform_string;
411 { JavaThread* thread = (JavaThread*)THREAD;
412 assert(thread->is_Java_thread(), "must be java thread");
413 JNIEnv *env = thread->jni_environment();
414 jstring js = (jstring) JNIHandles::make_local(env, java_string());
415 bool is_copy;
416 HandleMark hm(thread);
417 ThreadToNativeFromVM ttn(thread);
418 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
419 assert(is_copy == JNI_TRUE, "is_copy value changed");
420 JNIHandles::destroy_local(js);
421 }
422 return native_platform_string;
423 }
424
425 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
426 oop obj = java_string();
427 // Typical usage is to convert all '/' to '.' in string.
428 typeArrayOop value = java_lang_String::value(obj);
429 int length = java_lang_String::length(obj, value);
430 bool is_latin1 = java_lang_String::is_latin1(obj);
431
432 // First check if any from_char exist
433 int index; // Declared outside, used later
434 for (index = 0; index < length; index++) {
435 jchar c = !is_latin1 ? value->char_at(index) :
436 ((jchar) value->byte_at(index)) & 0xff;
437 if (c == from_char) {
438 break;
439 }
440 }
441 if (index == length) {
442 // No from_char, so do not copy.
443 return java_string;
444 }
445
446 // Check if result string will be latin1
447 bool to_is_latin1 = false;
448
449 // Replacement char must be latin1
450 if (CompactStrings && UNICODE::is_latin1(to_char)) {
451 if (is_latin1) {
452 // Source string is latin1 as well
453 to_is_latin1 = true;
454 } else if (!UNICODE::is_latin1(from_char)) {
455 // We are replacing an UTF16 char. Scan string to
456 // check if result can be latin1 encoded.
457 to_is_latin1 = true;
458 for (index = 0; index < length; index++) {
459 jchar c = value->char_at(index);
460 if (c != from_char && !UNICODE::is_latin1(c)) {
461 to_is_latin1 = false;
462 break;
463 }
464 }
465 }
466 }
467
468 // Create new UNICODE (or byte) buffer. Must handlize value because GC
469 // may happen during String and char array creation.
470 typeArrayHandle h_value(THREAD, value);
471 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
472 typeArrayOop from_buffer = h_value();
473 typeArrayOop to_buffer = java_lang_String::value(string());
474
475 // Copy contents
476 for (index = 0; index < length; index++) {
477 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
478 ((jchar) from_buffer->byte_at(index)) & 0xff;
479 if (c == from_char) {
480 c = to_char;
481 }
482 if (!to_is_latin1) {
483 to_buffer->char_at_put(index, c);
484 } else {
485 to_buffer->byte_at_put(index, (jbyte) c);
486 }
487 }
488 return string;
489 }
490
491 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
492 typeArrayOop value = java_lang_String::value(java_string);
493 length = java_lang_String::length(java_string, value);
494 bool is_latin1 = java_lang_String::is_latin1(java_string);
495
496 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
497 if (result != NULL) {
498 if (!is_latin1) {
499 for (int index = 0; index < length; index++) {
500 result[index] = value->char_at(index);
501 }
502 } else {
503 for (int index = 0; index < length; index++) {
504 result[index] = ((jchar) value->byte_at(index)) & 0xff;
505 }
506 }
507 } else {
508 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
509 }
510 return result;
511 }
512
513 unsigned int java_lang_String::hash_code(oop java_string) {
514 // The hash and hashIsZero fields are subject to a benign data race,
515 // making it crucial to ensure that any observable result of the
516 // calculation in this method stays correct under any possible read of
517 // these fields. Necessary restrictions to allow this to be correct
518 // without explicit memory fences or similar concurrency primitives is
519 // that we can ever only write to one of these two fields for a given
520 // String instance, and that the computation is idempotent and derived
521 // from immutable state
522 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
523 if (java_lang_String::hash_is_set(java_string)) {
524 return java_string->int_field(hash_offset);
525 }
526
527 typeArrayOop value = java_lang_String::value(java_string);
528 int length = java_lang_String::length(java_string, value);
529 bool is_latin1 = java_lang_String::is_latin1(java_string);
530
531 unsigned int hash = 0;
532 if (length > 0) {
533 if (is_latin1) {
534 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
535 } else {
536 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
537 }
538 }
539
540 if (hash != 0) {
541 java_string->int_field_put(hash_offset, hash);
542 } else {
543 java_string->bool_field_put(hashIsZero_offset, true);
544 }
545 return hash;
546 }
547
548 char* java_lang_String::as_quoted_ascii(oop java_string) {
549 typeArrayOop value = java_lang_String::value(java_string);
550 int length = java_lang_String::length(java_string, value);
551 bool is_latin1 = java_lang_String::is_latin1(java_string);
552
553 if (length == 0) return NULL;
554
555 char* result;
556 int result_length;
557 if (!is_latin1) {
558 jchar* base = value->char_at_addr(0);
559 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
560 result = NEW_RESOURCE_ARRAY(char, result_length);
561 UNICODE::as_quoted_ascii(base, length, result, result_length);
562 } else {
563 jbyte* base = value->byte_at_addr(0);
564 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
565 result = NEW_RESOURCE_ARRAY(char, result_length);
566 UNICODE::as_quoted_ascii(base, length, result, result_length);
567 }
568 assert(result_length >= length + 1, "must not be shorter");
569 assert(result_length == (int)strlen(result) + 1, "must match");
570 return result;
571 }
572
573 Symbol* java_lang_String::as_symbol(oop java_string) {
574 typeArrayOop value = java_lang_String::value(java_string);
575 int length = java_lang_String::length(java_string, value);
576 bool is_latin1 = java_lang_String::is_latin1(java_string);
577 if (!is_latin1) {
578 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
579 Symbol* sym = SymbolTable::new_symbol(base, length);
580 return sym;
581 } else {
582 ResourceMark rm;
583 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
584 const char* base = UNICODE::as_utf8(position, length);
585 Symbol* sym = SymbolTable::new_symbol(base, length);
586 return sym;
587 }
588 }
589
590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
591 typeArrayOop value = java_lang_String::value(java_string);
592 int length = java_lang_String::length(java_string, value);
593 bool is_latin1 = java_lang_String::is_latin1(java_string);
594 if (!is_latin1) {
595 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
596 return SymbolTable::probe_unicode(base, length);
597 } else {
598 ResourceMark rm;
599 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
600 const char* base = UNICODE::as_utf8(position, length);
601 return SymbolTable::probe(base, length);
602 }
603 }
604
605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
606 assert(value_equals(value, java_lang_String::value(java_string)),
607 "value must be same as java_lang_String::value(java_string)");
608 int length = java_lang_String::length(java_string, value);
609 if (length == 0) {
610 return 0;
611 }
612 if (!java_lang_String::is_latin1(java_string)) {
613 return UNICODE::utf8_length(value->char_at_addr(0), length);
614 } else {
615 return UNICODE::utf8_length(value->byte_at_addr(0), length);
616 }
617 }
618
619 int java_lang_String::utf8_length(oop java_string) {
620 typeArrayOop value = java_lang_String::value(java_string);
621 return utf8_length(java_string, value);
622 }
623
624 char* java_lang_String::as_utf8_string(oop java_string) {
625 typeArrayOop value = java_lang_String::value(java_string);
626 int length = java_lang_String::length(java_string, value);
627 bool is_latin1 = java_lang_String::is_latin1(java_string);
628 if (!is_latin1) {
629 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
630 return UNICODE::as_utf8(position, length);
631 } else {
632 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
633 return UNICODE::as_utf8(position, length);
634 }
635 }
636
637 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
638 assert(value_equals(value, java_lang_String::value(java_string)),
639 "value must be same as java_lang_String::value(java_string)");
640 int length = java_lang_String::length(java_string, value);
641 bool is_latin1 = java_lang_String::is_latin1(java_string);
642 if (!is_latin1) {
643 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
644 return UNICODE::as_utf8(position, length, buf, buflen);
645 } else {
646 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
647 return UNICODE::as_utf8(position, length, buf, buflen);
648 }
649 }
650
651 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
652 typeArrayOop value = java_lang_String::value(java_string);
653 return as_utf8_string(java_string, value, buf, buflen);
654 }
655
656 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
657 typeArrayOop value = java_lang_String::value(java_string);
658 bool is_latin1 = java_lang_String::is_latin1(java_string);
659 assert(start + len <= java_lang_String::length(java_string), "just checking");
660 if (!is_latin1) {
661 jchar* position = value->char_at_addr(start);
662 return UNICODE::as_utf8(position, len);
663 } else {
664 jbyte* position = value->byte_at_addr(start);
665 return UNICODE::as_utf8(position, len);
666 }
667 }
668
669 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
670 assert(value_equals(value, java_lang_String::value(java_string)),
671 "value must be same as java_lang_String::value(java_string)");
672 assert(start + len <= java_lang_String::length(java_string), "just checking");
673 bool is_latin1 = java_lang_String::is_latin1(java_string);
674 if (!is_latin1) {
675 jchar* position = value->char_at_addr(start);
676 return UNICODE::as_utf8(position, len, buf, buflen);
677 } else {
678 jbyte* position = value->byte_at_addr(start);
679 return UNICODE::as_utf8(position, len, buf, buflen);
680 }
681 }
682
683 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
684 assert(java_string->klass() == SystemDictionary::String_klass(),
685 "must be java_string");
686 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
687 int length = java_lang_String::length(java_string, value);
688 if (length != len) {
689 return false;
690 }
691 bool is_latin1 = java_lang_String::is_latin1(java_string);
692 if (!is_latin1) {
693 for (int i = 0; i < len; i++) {
694 if (value->char_at(i) != chars[i]) {
695 return false;
696 }
697 }
698 } else {
699 for (int i = 0; i < len; i++) {
700 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
701 return false;
702 }
703 }
704 }
705 return true;
706 }
707
708 bool java_lang_String::equals(oop str1, oop str2) {
709 assert(str1->klass() == SystemDictionary::String_klass(),
710 "must be java String");
711 assert(str2->klass() == SystemDictionary::String_klass(),
712 "must be java String");
713 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
714 bool is_latin1 = java_lang_String::is_latin1(str1);
715 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
716 bool is_latin2 = java_lang_String::is_latin1(str2);
717
718 if (is_latin1 != is_latin2) {
719 // Strings with different coders are never equal.
720 return false;
721 }
722 return value_equals(value1, value2);
723 }
724
725 void java_lang_String::print(oop java_string, outputStream* st) {
726 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
727 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
728
729 if (value == NULL) {
730 // This can happen if, e.g., printing a String
731 // object before its initializer has been called
732 st->print("NULL");
733 return;
734 }
735
736 int length = java_lang_String::length(java_string, value);
737 bool is_latin1 = java_lang_String::is_latin1(java_string);
738
739 st->print("\"");
740 for (int index = 0; index < length; index++) {
741 st->print("%c", (!is_latin1) ? value->char_at(index) :
742 ((jchar) value->byte_at(index)) & 0xff );
743 }
744 st->print("\"");
745 }
746
747
748 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
749 assert(mirror.not_null() && fd->is_static(), "just checking");
750 if (fd->has_initial_value()) {
751 BasicType t = fd->field_type();
752 switch (t) {
753 case T_BYTE:
754 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
755 break;
756 case T_BOOLEAN:
757 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
758 break;
759 case T_CHAR:
760 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
761 break;
762 case T_SHORT:
763 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
764 break;
765 case T_INT:
766 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
767 break;
768 case T_FLOAT:
769 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
770 break;
771 case T_DOUBLE:
772 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
773 break;
774 case T_LONG:
775 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
776 break;
777 case T_OBJECT:
778 {
779 assert(fd->signature() == vmSymbols::string_signature(),
780 "just checking");
781 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
782 // Archive the String field and update the pointer.
783 oop s = mirror()->obj_field(fd->offset());
784 oop archived_s = StringTable::create_archived_string(s, CHECK);
785 mirror()->obj_field_put(fd->offset(), archived_s);
786 } else {
787 oop string = fd->string_initial_value(CHECK);
788 mirror()->obj_field_put(fd->offset(), string);
789 }
790 }
791 break;
792 default:
793 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
794 "Illegal ConstantValue attribute in class file");
795 }
796 }
797 }
798
799
800 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
801 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
802
803 // If the offset was read from the shared archive, it was fixed up already
804 if (!k->is_shared()) {
805 if (k->is_instance_klass()) {
806 // During bootstrap, java.lang.Class wasn't loaded so static field
807 // offsets were computed without the size added it. Go back and
808 // update all the static field offsets to included the size.
809 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
810 if (fs.access_flags().is_static()) {
811 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
812 fs.set_offset(real_offset);
813 }
814 }
815 }
816 }
817
818 if (k->is_shared() && k->has_raw_archived_mirror()) {
819 if (HeapShared::open_archive_heap_region_mapped()) {
820 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
821 assert(present, "Missing archived mirror for %s", k->external_name());
822 return;
823 } else {
824 k->set_java_mirror_handle(NULL);
825 k->clear_has_raw_archived_mirror();
826 }
827 }
828 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
829 }
830
831 void java_lang_Class::initialize_mirror_fields(Klass* k,
832 Handle mirror,
833 Handle protection_domain,
834 TRAPS) {
835 // Allocate a simple java object for a lock.
836 // This needs to be a java object because during class initialization
837 // it can be held across a java call.
838 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
839 set_init_lock(mirror(), r);
840
841 // Set protection domain also
842 set_protection_domain(mirror(), protection_domain());
843
844 // Initialize static fields
845 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
846 }
847
848 // Set the java.lang.Module module field in the java_lang_Class mirror
849 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
850 if (module.is_null()) {
851 // During startup, the module may be NULL only if java.base has not been defined yet.
852 // Put the class on the fixup_module_list to patch later when the java.lang.Module
853 // for java.base is known. But note that since we captured the NULL module another
854 // thread may have completed that initialization.
855
856 bool javabase_was_defined = false;
857 {
858 MutexLocker m1(Module_lock, THREAD);
859 // Keep list of classes needing java.base module fixup
860 if (!ModuleEntryTable::javabase_defined()) {
861 assert(k->java_mirror() != NULL, "Class's mirror is null");
862 k->class_loader_data()->inc_keep_alive();
863 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
864 fixup_module_field_list()->push(k);
865 } else {
866 javabase_was_defined = true;
867 }
868 }
869
870 // If java.base was already defined then patch this particular class with java.base.
871 if (javabase_was_defined) {
872 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
873 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
874 "Setting class module field, " JAVA_BASE_NAME " should be defined");
875 Handle javabase_handle(THREAD, javabase_entry->module());
876 set_module(mirror(), javabase_handle());
877 }
878 } else {
879 assert(Universe::is_module_initialized() ||
880 (ModuleEntryTable::javabase_defined() &&
881 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
882 "Incorrect java.lang.Module specification while creating mirror");
883 set_module(mirror(), module());
884 }
885 }
886
887 // Statically allocate fixup lists because they always get created.
888 void java_lang_Class::allocate_fixup_lists() {
889 GrowableArray<Klass*>* mirror_list =
890 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
891 set_fixup_mirror_list(mirror_list);
892
893 GrowableArray<Klass*>* module_list =
894 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
895 set_fixup_module_field_list(module_list);
896 }
897
898 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
899 Handle module, Handle protection_domain, TRAPS) {
900 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
901 assert(k->java_mirror() == NULL, "should only assign mirror once");
902
903 // Use this moment of initialization to cache modifier_flags also,
904 // to support Class.getModifiers(). Instance classes recalculate
905 // the cached flags after the class file is parsed, but before the
906 // class is put into the system dictionary.
907 int computed_modifiers = k->compute_modifier_flags(CHECK);
908 k->set_modifier_flags(computed_modifiers);
909 // Class_klass has to be loaded because it is used to allocate
910 // the mirror.
911 if (SystemDictionary::Class_klass_loaded()) {
912 // Allocate mirror (java.lang.Class instance)
913 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
914 Handle mirror(THREAD, mirror_oop);
915 Handle comp_mirror;
916
917 // Setup indirection from mirror->klass
918 java_lang_Class::set_klass(mirror(), k);
919
920 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
921 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
922
923 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
924
925 // It might also have a component mirror. This mirror must already exist.
926 if (k->is_array_klass()) {
927 if (k->is_typeArray_klass()) {
928 BasicType type = TypeArrayKlass::cast(k)->element_type();
929 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
930 } else {
931 assert(k->is_objArray_klass(), "Must be");
932 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
933 assert(element_klass != NULL, "Must have an element klass");
934 comp_mirror = Handle(THREAD, element_klass->java_mirror());
935 }
936 assert(comp_mirror() != NULL, "must have a mirror");
937
938 // Two-way link between the array klass and its component mirror:
939 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
940 set_component_mirror(mirror(), comp_mirror());
941 // See below for ordering dependencies between field array_klass in component mirror
942 // and java_mirror in this klass.
943 } else {
944 assert(k->is_instance_klass(), "Must be");
945
946 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
947 if (HAS_PENDING_EXCEPTION) {
948 // If any of the fields throws an exception like OOM remove the klass field
949 // from the mirror so GC doesn't follow it after the klass has been deallocated.
950 // This mirror looks like a primitive type, which logically it is because it
951 // it represents no class.
952 java_lang_Class::set_klass(mirror(), NULL);
953 return;
954 }
955 }
956
957 // set the classLoader field in the java_lang_Class instance
958 assert(class_loader() == k->class_loader(), "should be same");
959 set_class_loader(mirror(), class_loader());
960
961 // Setup indirection from klass->mirror
962 // after any exceptions can happen during allocations.
963 k->set_java_mirror(mirror);
964
965 // Set the module field in the java_lang_Class instance. This must be done
966 // after the mirror is set.
967 set_mirror_module_field(k, mirror, module, THREAD);
968
969 if (comp_mirror() != NULL) {
970 // Set after k->java_mirror() is published, because compiled code running
971 // concurrently doesn't expect a k to have a null java_mirror.
972 release_set_array_klass(comp_mirror(), k);
973 }
974 } else {
975 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
976 fixup_mirror_list()->push(k);
977 }
978 }
979
980 #if INCLUDE_CDS_JAVA_HEAP
981 // Clears mirror fields. Static final fields with initial values are reloaded
982 // from constant pool. The object identity hash is in the object header and is
983 // not affected.
984 class ResetMirrorField: public FieldClosure {
985 private:
986 Handle _m;
987
988 public:
989 ResetMirrorField(Handle mirror) : _m(mirror) {}
990
991 void do_field(fieldDescriptor* fd) {
992 assert(DumpSharedSpaces, "dump time only");
993 assert(_m.not_null(), "Mirror cannot be NULL");
994
995 if (fd->is_static() && fd->has_initial_value()) {
996 initialize_static_field(fd, _m, Thread::current());
997 return;
998 }
999
1000 BasicType ft = fd->field_type();
1001 switch (ft) {
1002 case T_BYTE:
1003 _m()->byte_field_put(fd->offset(), 0);
1004 break;
1005 case T_CHAR:
1006 _m()->char_field_put(fd->offset(), 0);
1007 break;
1008 case T_DOUBLE:
1009 _m()->double_field_put(fd->offset(), 0);
1010 break;
1011 case T_FLOAT:
1012 _m()->float_field_put(fd->offset(), 0);
1013 break;
1014 case T_INT:
1015 _m()->int_field_put(fd->offset(), 0);
1016 break;
1017 case T_LONG:
1018 _m()->long_field_put(fd->offset(), 0);
1019 break;
1020 case T_SHORT:
1021 _m()->short_field_put(fd->offset(), 0);
1022 break;
1023 case T_BOOLEAN:
1024 _m()->bool_field_put(fd->offset(), false);
1025 break;
1026 case T_ARRAY:
1027 case T_OBJECT: {
1028 // It might be useful to cache the String field, but
1029 // for now just clear out any reference field
1030 oop o = _m()->obj_field(fd->offset());
1031 _m()->obj_field_put(fd->offset(), NULL);
1032 break;
1033 }
1034 default:
1035 ShouldNotReachHere();
1036 break;
1037 }
1038 }
1039 };
1040
1041 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1042 assert(HeapShared::is_heap_object_archiving_allowed(),
1043 "HeapShared::is_heap_object_archiving_allowed() must be true");
1044
1045 for (int t = 0; t <= T_VOID; t++) {
1046 oop m = Universe::_mirrors[t];
1047 if (m != NULL) {
1048 // Update the field at _array_klass_offset to point to the relocated array klass.
1049 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1050 assert(archived_m != NULL, "sanity");
1051 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1052 assert(ak != NULL || t == T_VOID, "should not be NULL");
1053 if (ak != NULL) {
1054 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true);
1055 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1056 }
1057
1058 // Clear the fields. Just to be safe
1059 Klass *k = m->klass();
1060 Handle archived_mirror_h(THREAD, archived_m);
1061 ResetMirrorField reset(archived_mirror_h);
1062 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1063
1064 log_trace(cds, heap, mirror)(
1065 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1066 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1067
1068 Universe::_mirrors[t] = archived_m;
1069 }
1070 }
1071
1072 assert(Universe::_mirrors[T_INT] != NULL &&
1073 Universe::_mirrors[T_FLOAT] != NULL &&
1074 Universe::_mirrors[T_DOUBLE] != NULL &&
1075 Universe::_mirrors[T_BYTE] != NULL &&
1076 Universe::_mirrors[T_BOOLEAN] != NULL &&
1077 Universe::_mirrors[T_CHAR] != NULL &&
1078 Universe::_mirrors[T_LONG] != NULL &&
1079 Universe::_mirrors[T_SHORT] != NULL &&
1080 Universe::_mirrors[T_VOID] != NULL, "sanity");
1081
1082 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1083 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1084 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1085 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1086 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1087 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1088 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1089 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1090 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1091 }
1092
1093 //
1094 // After the mirror object is successfully archived, the archived
1095 // klass is set with _has_archived_raw_mirror flag.
1096 //
1097 // The _has_archived_raw_mirror flag is cleared at runtime when the
1098 // archived mirror is restored. If archived java heap data cannot
1099 // be used at runtime, new mirror object is created for the shared
1100 // class. The _has_archived_raw_mirror is cleared also during the process.
1101 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1102 assert(HeapShared::is_heap_object_archiving_allowed(),
1103 "HeapShared::is_heap_object_archiving_allowed() must be true");
1104
1105 // Mirror is already archived
1106 if (k->has_raw_archived_mirror()) {
1107 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1108 return k->archived_java_mirror_raw();
1109 }
1110
1111 // No mirror
1112 oop mirror = k->java_mirror();
1113 if (mirror == NULL) {
1114 return NULL;
1115 }
1116
1117 if (k->is_instance_klass()) {
1118 InstanceKlass *ik = InstanceKlass::cast(k);
1119 assert(ik->signers() == NULL, "class with signer should have been excluded");
1120
1121 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1122 ik->is_shared_app_class())) {
1123 // Archiving mirror for classes from non-builtin loaders is not
1124 // supported. Clear the _java_mirror within the archived class.
1125 k->set_java_mirror_handle(NULL);
1126 return NULL;
1127 }
1128 }
1129
1130 // Now start archiving the mirror object
1131 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1132 if (archived_mirror == NULL) {
1133 return NULL;
1134 }
1135
1136 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1137 if (archived_mirror == NULL) {
1138 return NULL;
1139 }
1140
1141 k->set_archived_java_mirror_raw(archived_mirror);
1142
1143 k->set_has_raw_archived_mirror();
1144
1145 ResourceMark rm;
1146 log_trace(cds, heap, mirror)(
1147 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1148 k->external_name(), p2i(mirror), p2i(archived_mirror));
1149
1150 return archived_mirror;
1151 }
1152
1153 // The process is based on create_mirror().
1154 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1155 oop archived_mirror,
1156 Thread *THREAD) {
1157 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1158 // to archived metadata and objects below.
1159 Klass *c = archived_mirror->klass();
1160 Handle archived_mirror_h(THREAD, archived_mirror);
1161 ResetMirrorField reset(archived_mirror_h);
1162 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1163
1164 if (k->is_array_klass()) {
1165 oop archived_comp_mirror;
1166 if (k->is_typeArray_klass()) {
1167 // The primitive type mirrors are already archived. Get the archived mirror.
1168 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1169 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1170 assert(archived_comp_mirror != NULL, "Must be");
1171 } else {
1172 assert(k->is_objArray_klass(), "Must be");
1173 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1174 assert(element_klass != NULL, "Must have an element klass");
1175 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1176 if (archived_comp_mirror == NULL) {
1177 return NULL;
1178 }
1179 }
1180 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1181 } else {
1182 assert(k->is_instance_klass(), "Must be");
1183
1184 // Reset local static fields in the mirror
1185 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1186
1187 java_lang_Class:set_init_lock(archived_mirror, NULL);
1188
1189 set_protection_domain(archived_mirror, NULL);
1190 }
1191
1192 // clear class loader and mirror_module_field
1193 set_class_loader(archived_mirror, NULL);
1194 set_module(archived_mirror, NULL);
1195
1196 // The archived mirror's field at _klass_offset is still pointing to the original
1197 // klass. Updated the field in the archived mirror to point to the relocated
1198 // klass in the archive.
1199 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true);
1200 log_debug(cds, heap, mirror)(
1201 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1202 p2i(as_Klass(mirror)), p2i(reloc_k));
1203 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1204
1205 // The field at _array_klass_offset is pointing to the original one dimension
1206 // higher array klass if exists. Relocate the pointer.
1207 Klass *arr = array_klass_acquire(mirror);
1208 if (arr != NULL) {
1209 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true);
1210 log_debug(cds, heap, mirror)(
1211 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1212 p2i(arr), p2i(reloc_arr));
1213 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1214 }
1215 return archived_mirror;
1216 }
1217
1218 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) {
1219 if (MetaspaceShared::mapping_delta() != 0) {
1220 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class");
1221
1222 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1223 if (ak != NULL) {
1224 archived_mirror->metadata_field_put(_array_klass_offset, (Klass*)(address(ak) + MetaspaceShared::mapping_delta()));
1225 }
1226 }
1227 }
1228
1229 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) {
1230 if (MetaspaceShared::mapping_delta() != 0) {
1231 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset));
1232 archived_mirror->metadata_field_put(_klass_offset, (Klass*)(address(k) + MetaspaceShared::mapping_delta()));
1233
1234 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1235 if (ak != NULL) {
1236 archived_mirror->metadata_field_put(_array_klass_offset, (Klass*)(address(ak) + MetaspaceShared::mapping_delta()));
1237 }
1238 }
1239 }
1240
1241
1242 // Returns true if the mirror is updated, false if no archived mirror
1243 // data is present. After the archived mirror object is restored, the
1244 // shared klass' _has_raw_archived_mirror flag is cleared.
1245 bool java_lang_Class::restore_archived_mirror(Klass *k,
1246 Handle class_loader, Handle module,
1247 Handle protection_domain, TRAPS) {
1248 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1249 // see more details in SystemDictionary::resolve_well_known_classes().
1250 if (!SystemDictionary::Class_klass_loaded()) {
1251 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1252 fixup_mirror_list()->push(k);
1253 return true;
1254 }
1255
1256 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1257 if (m == NULL) {
1258 return false;
1259 }
1260
1261 // mirror is archived, restore
1262 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1263 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1264 update_archived_mirror_native_pointers(m);
1265 assert(as_Klass(m) == k, "must be");
1266 Handle mirror(THREAD, m);
1267
1268 if (!k->is_array_klass()) {
1269 // - local static final fields with initial values were initialized at dump time
1270
1271 // create the init_lock
1272 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1273 set_init_lock(mirror(), r);
1274
1275 if (protection_domain.not_null()) {
1276 set_protection_domain(mirror(), protection_domain());
1277 }
1278 }
1279
1280 assert(class_loader() == k->class_loader(), "should be same");
1281 if (class_loader.not_null()) {
1282 set_class_loader(mirror(), class_loader());
1283 }
1284
1285 k->set_java_mirror(mirror);
1286 k->clear_has_raw_archived_mirror();
1287
1288 set_mirror_module_field(k, mirror, module, THREAD);
1289
1290 ResourceMark rm;
1291 log_trace(cds, heap, mirror)(
1292 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1293
1294 return true;
1295 }
1296 #endif // INCLUDE_CDS_JAVA_HEAP
1297
1298 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1299 assert(_module_offset != 0, "must have been computed already");
1300 java_lang_Class::set_module(k->java_mirror(), module());
1301 }
1302
1303 int java_lang_Class::oop_size(oop java_class) {
1304 assert(_oop_size_offset != 0, "must be set");
1305 int size = java_class->int_field(_oop_size_offset);
1306 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1307 return size;
1308 }
1309
1310
1311 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1312 assert(_oop_size_offset != 0, "must be set");
1313 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1314 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1315 }
1316
1317 int java_lang_Class::static_oop_field_count(oop java_class) {
1318 assert(_static_oop_field_count_offset != 0, "must be set");
1319 return java_class->int_field(_static_oop_field_count_offset);
1320 }
1321
1322 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1323 assert(_static_oop_field_count_offset != 0, "must be set");
1324 return java_class->int_field_raw(_static_oop_field_count_offset);
1325 }
1326
1327 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1328 assert(_static_oop_field_count_offset != 0, "must be set");
1329 java_class->int_field_put(_static_oop_field_count_offset, size);
1330 }
1331
1332 oop java_lang_Class::protection_domain(oop java_class) {
1333 assert(_protection_domain_offset != 0, "must be set");
1334 return java_class->obj_field(_protection_domain_offset);
1335 }
1336 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1337 assert(_protection_domain_offset != 0, "must be set");
1338 java_class->obj_field_put(_protection_domain_offset, pd);
1339 }
1340
1341 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1342 assert(_component_mirror_offset != 0, "must be set");
1343 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1344 }
1345 oop java_lang_Class::component_mirror(oop java_class) {
1346 assert(_component_mirror_offset != 0, "must be set");
1347 return java_class->obj_field(_component_mirror_offset);
1348 }
1349
1350 oop java_lang_Class::init_lock(oop java_class) {
1351 assert(_init_lock_offset != 0, "must be set");
1352 return java_class->obj_field(_init_lock_offset);
1353 }
1354 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1355 assert(_init_lock_offset != 0, "must be set");
1356 java_class->obj_field_put(_init_lock_offset, init_lock);
1357 }
1358
1359 objArrayOop java_lang_Class::signers(oop java_class) {
1360 assert(_signers_offset != 0, "must be set");
1361 return (objArrayOop)java_class->obj_field(_signers_offset);
1362 }
1363 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1364 assert(_signers_offset != 0, "must be set");
1365 java_class->obj_field_put(_signers_offset, (oop)signers);
1366 }
1367
1368
1369 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1370 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1371 if (_class_loader_offset != 0) {
1372 java_class->obj_field_put(_class_loader_offset, loader);
1373 }
1374 }
1375
1376 oop java_lang_Class::class_loader(oop java_class) {
1377 assert(_class_loader_offset != 0, "must be set");
1378 return java_class->obj_field(_class_loader_offset);
1379 }
1380
1381 oop java_lang_Class::module(oop java_class) {
1382 assert(_module_offset != 0, "must be set");
1383 return java_class->obj_field(_module_offset);
1384 }
1385
1386 void java_lang_Class::set_module(oop java_class, oop module) {
1387 assert(_module_offset != 0, "must be set");
1388 java_class->obj_field_put(_module_offset, module);
1389 }
1390
1391 oop java_lang_Class::name(Handle java_class, TRAPS) {
1392 assert(_name_offset != 0, "must be set");
1393 oop o = java_class->obj_field(_name_offset);
1394 if (o == NULL) {
1395 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1396 java_class->obj_field_put(_name_offset, o);
1397 }
1398 return o;
1399 }
1400
1401 oop java_lang_Class::source_file(oop java_class) {
1402 assert(_source_file_offset != 0, "must be set");
1403 return java_class->obj_field(_source_file_offset);
1404 }
1405
1406 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1407 assert(_source_file_offset != 0, "must be set");
1408 java_class->obj_field_put(_source_file_offset, source_file);
1409 }
1410
1411 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1412 // This should be improved by adding a field at the Java level or by
1413 // introducing a new VM klass (see comment in ClassFileParser)
1414 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1415 if (type != T_VOID) {
1416 Klass* aklass = Universe::typeArrayKlassObj(type);
1417 assert(aklass != NULL, "correct bootstrap");
1418 release_set_array_klass(java_class, aklass);
1419 }
1420 #ifdef ASSERT
1421 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1422 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1423 #endif
1424 return java_class;
1425 }
1426
1427
1428 Klass* java_lang_Class::as_Klass(oop java_class) {
1429 //%note memory_2
1430 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1431 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1432 assert(k == NULL || k->is_klass(), "type check");
1433 return k;
1434 }
1435
1436 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1437 //%note memory_2
1438 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1439 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1440 assert(k == NULL || k->is_klass(), "type check");
1441 return k;
1442 }
1443
1444
1445 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1446 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1447 java_class->metadata_field_put(_klass_offset, klass);
1448 }
1449
1450
1451 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1452 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1453 Symbol* name = NULL;
1454 bool is_instance = false;
1455 if (is_primitive(java_class)) {
1456 name = vmSymbols::type_signature(primitive_type(java_class));
1457 } else {
1458 Klass* k = as_Klass(java_class);
1459 is_instance = k->is_instance_klass();
1460 name = k->name();
1461 }
1462 if (name == NULL) {
1463 st->print("<null>");
1464 return;
1465 }
1466 if (is_instance) st->print("L");
1467 st->write((char*) name->base(), (int) name->utf8_length());
1468 if (is_instance) st->print(";");
1469 }
1470
1471 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1472 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1473 Symbol* name;
1474 if (is_primitive(java_class)) {
1475 name = vmSymbols::type_signature(primitive_type(java_class));
1476 // Because this can create a new symbol, the caller has to decrement
1477 // the refcount, so make adjustment here and below for symbols returned
1478 // that are not created or incremented due to a successful lookup.
1479 name->increment_refcount();
1480 } else {
1481 Klass* k = as_Klass(java_class);
1482 if (!k->is_instance_klass()) {
1483 name = k->name();
1484 name->increment_refcount();
1485 } else {
1486 ResourceMark rm;
1487 const char* sigstr = k->signature_name();
1488 int siglen = (int) strlen(sigstr);
1489 if (!intern_if_not_found) {
1490 name = SymbolTable::probe(sigstr, siglen);
1491 } else {
1492 name = SymbolTable::new_symbol(sigstr, siglen);
1493 }
1494 }
1495 }
1496 return name;
1497 }
1498
1499 // Returns the Java name for this Java mirror (Resource allocated)
1500 // See Klass::external_name().
1501 // For primitive type Java mirrors, its type name is returned.
1502 const char* java_lang_Class::as_external_name(oop java_class) {
1503 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1504 const char* name = NULL;
1505 if (is_primitive(java_class)) {
1506 name = type2name(primitive_type(java_class));
1507 } else {
1508 name = as_Klass(java_class)->external_name();
1509 }
1510 if (name == NULL) {
1511 name = "<null>";
1512 }
1513 return name;
1514 }
1515
1516 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1517 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1518 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1519 return k;
1520 }
1521
1522
1523 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1524 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1525 java_class->release_metadata_field_put(_array_klass_offset, klass);
1526 }
1527
1528
1529 BasicType java_lang_Class::primitive_type(oop java_class) {
1530 assert(java_lang_Class::is_primitive(java_class), "just checking");
1531 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1532 BasicType type = T_VOID;
1533 if (ak != NULL) {
1534 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1535 type = ArrayKlass::cast(ak)->element_type();
1536 } else {
1537 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1538 }
1539 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1540 return type;
1541 }
1542
1543 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1544 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1545 if (is_primitive(java_class)) {
1546 if (reference_klass != NULL)
1547 (*reference_klass) = NULL;
1548 return primitive_type(java_class);
1549 } else {
1550 if (reference_klass != NULL)
1551 (*reference_klass) = as_Klass(java_class);
1552 return T_OBJECT;
1553 }
1554 }
1555
1556
1557 oop java_lang_Class::primitive_mirror(BasicType t) {
1558 oop mirror = Universe::java_mirror(t);
1559 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1560 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1561 return mirror;
1562 }
1563
1564 bool java_lang_Class::offsets_computed = false;
1565 int java_lang_Class::classRedefinedCount_offset = -1;
1566
1567 #define CLASS_FIELDS_DO(macro) \
1568 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \
1569 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1570 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1571 macro(_module_offset, k, "module", module_signature, false); \
1572 macro(_name_offset, k, "name", string_signature, false); \
1573
1574 void java_lang_Class::compute_offsets() {
1575 if (offsets_computed) {
1576 return;
1577 }
1578
1579 offsets_computed = true;
1580
1581 InstanceKlass* k = SystemDictionary::Class_klass();
1582 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1583
1584 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1585 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1586 // GC treats them the same.
1587 _init_lock_offset = _component_mirror_offset;
1588
1589 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1590 }
1591
1592 #if INCLUDE_CDS
1593 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1594 f->do_bool(&offsets_computed);
1595 f->do_u4((u4*)&_init_lock_offset);
1596
1597 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1598
1599 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1600 }
1601 #endif
1602
1603 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1604 if (classRedefinedCount_offset == -1) {
1605 // If we don't have an offset for it then just return -1 as a marker.
1606 return -1;
1607 }
1608
1609 return the_class_mirror->int_field(classRedefinedCount_offset);
1610 }
1611
1612 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1613 if (classRedefinedCount_offset == -1) {
1614 // If we don't have an offset for it then nothing to set.
1615 return;
1616 }
1617
1618 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1619 }
1620
1621
1622 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1623 // platform thread structure, and a eetop offset which was used for thread
1624 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1625 // merged, so in the HotSpot VM we just use the eetop field for the thread
1626 // instead of the privateInfo_offset.
1627 //
1628 // Note: The stackSize field is only present starting in 1.4.
1629
1630 int java_lang_Thread::_name_offset = 0;
1631 int java_lang_Thread::_group_offset = 0;
1632 int java_lang_Thread::_contextClassLoader_offset = 0;
1633 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1634 int java_lang_Thread::_priority_offset = 0;
1635 int java_lang_Thread::_eetop_offset = 0;
1636 int java_lang_Thread::_daemon_offset = 0;
1637 int java_lang_Thread::_stillborn_offset = 0;
1638 int java_lang_Thread::_stackSize_offset = 0;
1639 int java_lang_Thread::_tid_offset = 0;
1640 int java_lang_Thread::_thread_status_offset = 0;
1641 int java_lang_Thread::_park_blocker_offset = 0;
1642
1643 #define THREAD_FIELDS_DO(macro) \
1644 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1645 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1646 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1647 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1648 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1649 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1650 macro(_eetop_offset, k, "eetop", long_signature, false); \
1651 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1652 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1653 macro(_tid_offset, k, "tid", long_signature, false); \
1654 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1655 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1656
1657 void java_lang_Thread::compute_offsets() {
1658 assert(_group_offset == 0, "offsets should be initialized only once");
1659
1660 InstanceKlass* k = SystemDictionary::Thread_klass();
1661 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1662 }
1663
1664 #if INCLUDE_CDS
1665 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1666 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1667 }
1668 #endif
1669
1670 JavaThread* java_lang_Thread::thread(oop java_thread) {
1671 return (JavaThread*)java_thread->address_field(_eetop_offset);
1672 }
1673
1674
1675 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1676 java_thread->address_field_put(_eetop_offset, (address)thread);
1677 }
1678
1679
1680 oop java_lang_Thread::name(oop java_thread) {
1681 return java_thread->obj_field(_name_offset);
1682 }
1683
1684
1685 void java_lang_Thread::set_name(oop java_thread, oop name) {
1686 java_thread->obj_field_put(_name_offset, name);
1687 }
1688
1689
1690 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1691 return (ThreadPriority)java_thread->int_field(_priority_offset);
1692 }
1693
1694
1695 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1696 java_thread->int_field_put(_priority_offset, priority);
1697 }
1698
1699
1700 oop java_lang_Thread::threadGroup(oop java_thread) {
1701 return java_thread->obj_field(_group_offset);
1702 }
1703
1704
1705 bool java_lang_Thread::is_stillborn(oop java_thread) {
1706 return java_thread->bool_field(_stillborn_offset) != 0;
1707 }
1708
1709
1710 // We never have reason to turn the stillborn bit off
1711 void java_lang_Thread::set_stillborn(oop java_thread) {
1712 java_thread->bool_field_put(_stillborn_offset, true);
1713 }
1714
1715
1716 bool java_lang_Thread::is_alive(oop java_thread) {
1717 JavaThread* thr = java_lang_Thread::thread(java_thread);
1718 return (thr != NULL);
1719 }
1720
1721
1722 bool java_lang_Thread::is_daemon(oop java_thread) {
1723 return java_thread->bool_field(_daemon_offset) != 0;
1724 }
1725
1726
1727 void java_lang_Thread::set_daemon(oop java_thread) {
1728 java_thread->bool_field_put(_daemon_offset, true);
1729 }
1730
1731 oop java_lang_Thread::context_class_loader(oop java_thread) {
1732 return java_thread->obj_field(_contextClassLoader_offset);
1733 }
1734
1735 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1736 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1737 }
1738
1739
1740 jlong java_lang_Thread::stackSize(oop java_thread) {
1741 return java_thread->long_field(_stackSize_offset);
1742 }
1743
1744 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1745 void java_lang_Thread::set_thread_status(oop java_thread,
1746 java_lang_Thread::ThreadStatus status) {
1747 java_thread->int_field_put(_thread_status_offset, status);
1748 }
1749
1750 // Read thread status value from threadStatus field in java.lang.Thread java class.
1751 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1752 // Make sure the caller is operating on behalf of the VM or is
1753 // running VM code (state == _thread_in_vm).
1754 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1755 JavaThread::current()->thread_state() == _thread_in_vm,
1756 "Java Thread is not running in vm");
1757 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1758 }
1759
1760
1761 jlong java_lang_Thread::thread_id(oop java_thread) {
1762 return java_thread->long_field(_tid_offset);
1763 }
1764
1765 oop java_lang_Thread::park_blocker(oop java_thread) {
1766 return java_thread->obj_field(_park_blocker_offset);
1767 }
1768
1769 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1770 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1771 switch (status) {
1772 case NEW : return "NEW";
1773 case RUNNABLE : return "RUNNABLE";
1774 case SLEEPING : return "TIMED_WAITING (sleeping)";
1775 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1776 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1777 case PARKED : return "WAITING (parking)";
1778 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1779 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1780 case TERMINATED : return "TERMINATED";
1781 default : return "UNKNOWN";
1782 };
1783 }
1784 int java_lang_ThreadGroup::_parent_offset = 0;
1785 int java_lang_ThreadGroup::_name_offset = 0;
1786 int java_lang_ThreadGroup::_threads_offset = 0;
1787 int java_lang_ThreadGroup::_groups_offset = 0;
1788 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1789 int java_lang_ThreadGroup::_destroyed_offset = 0;
1790 int java_lang_ThreadGroup::_daemon_offset = 0;
1791 int java_lang_ThreadGroup::_nthreads_offset = 0;
1792 int java_lang_ThreadGroup::_ngroups_offset = 0;
1793
1794 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1795 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1796 return java_thread_group->obj_field(_parent_offset);
1797 }
1798
1799 // ("name as oop" accessor is not necessary)
1800
1801 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1802 oop name = java_thread_group->obj_field(_name_offset);
1803 // ThreadGroup.name can be null
1804 if (name != NULL) {
1805 return java_lang_String::as_utf8_string(name);
1806 }
1807 return NULL;
1808 }
1809
1810 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1811 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1812 return java_thread_group->int_field(_nthreads_offset);
1813 }
1814
1815 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1816 oop threads = java_thread_group->obj_field(_threads_offset);
1817 assert(threads != NULL, "threadgroups should have threads");
1818 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1819 return objArrayOop(threads);
1820 }
1821
1822 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1823 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1824 return java_thread_group->int_field(_ngroups_offset);
1825 }
1826
1827 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1828 oop groups = java_thread_group->obj_field(_groups_offset);
1829 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1830 return objArrayOop(groups);
1831 }
1832
1833 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1834 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1835 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1836 }
1837
1838 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1839 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1840 return java_thread_group->bool_field(_destroyed_offset) != 0;
1841 }
1842
1843 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1844 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1845 return java_thread_group->bool_field(_daemon_offset) != 0;
1846 }
1847
1848 #define THREADGROUP_FIELDS_DO(macro) \
1849 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1850 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1851 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1852 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1853 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1854 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1855 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1856 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1857 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1858
1859 void java_lang_ThreadGroup::compute_offsets() {
1860 assert(_parent_offset == 0, "offsets should be initialized only once");
1861
1862 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1863 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1864 }
1865
1866 #if INCLUDE_CDS
1867 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1868 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1869 }
1870 #endif
1871
1872 #define THROWABLE_FIELDS_DO(macro) \
1873 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1874 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1875 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1876 macro(depth_offset, k, "depth", int_signature, false); \
1877 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1878
1879 void java_lang_Throwable::compute_offsets() {
1880 InstanceKlass* k = SystemDictionary::Throwable_klass();
1881 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1882 }
1883
1884 #if INCLUDE_CDS
1885 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1886 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1887 }
1888 #endif
1889
1890 oop java_lang_Throwable::unassigned_stacktrace() {
1891 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1892 oop base = ik->static_field_base_raw();
1893 return base->obj_field(static_unassigned_stacktrace_offset);
1894 }
1895
1896 oop java_lang_Throwable::backtrace(oop throwable) {
1897 return throwable->obj_field_acquire(backtrace_offset);
1898 }
1899
1900
1901 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1902 throwable->release_obj_field_put(backtrace_offset, value);
1903 }
1904
1905 int java_lang_Throwable::depth(oop throwable) {
1906 return throwable->int_field(depth_offset);
1907 }
1908
1909 void java_lang_Throwable::set_depth(oop throwable, int value) {
1910 throwable->int_field_put(depth_offset, value);
1911 }
1912
1913 oop java_lang_Throwable::message(oop throwable) {
1914 return throwable->obj_field(detailMessage_offset);
1915 }
1916
1917
1918 // Return Symbol for detailed_message or NULL
1919 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1920 PRESERVE_EXCEPTION_MARK; // Keep original exception
1921 oop detailed_message = java_lang_Throwable::message(throwable);
1922 if (detailed_message != NULL) {
1923 return java_lang_String::as_symbol(detailed_message);
1924 }
1925 return NULL;
1926 }
1927
1928 void java_lang_Throwable::set_message(oop throwable, oop value) {
1929 throwable->obj_field_put(detailMessage_offset, value);
1930 }
1931
1932
1933 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1934 throwable->obj_field_put(stackTrace_offset, st_element_array);
1935 }
1936
1937 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1938 set_stacktrace(throwable, NULL);
1939 }
1940
1941
1942 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1943 ResourceMark rm;
1944 Klass* k = throwable->klass();
1945 assert(k != NULL, "just checking");
1946 st->print("%s", k->external_name());
1947 oop msg = message(throwable);
1948 if (msg != NULL) {
1949 st->print(": %s", java_lang_String::as_utf8_string(msg));
1950 }
1951 }
1952
1953 // After this many redefines, the stack trace is unreliable.
1954 const int MAX_VERSION = USHRT_MAX;
1955
1956 static inline bool version_matches(Method* method, int version) {
1957 assert(version < MAX_VERSION, "version is too big");
1958 return method != NULL && (method->constants()->version() == version);
1959 }
1960
1961
1962 // This class provides a simple wrapper over the internal structure of
1963 // exception backtrace to insulate users of the backtrace from needing
1964 // to know what it looks like.
1965 class BacktraceBuilder: public StackObj {
1966 friend class BacktraceIterator;
1967 private:
1968 Handle _backtrace;
1969 objArrayOop _head;
1970 typeArrayOop _methods;
1971 typeArrayOop _bcis;
1972 objArrayOop _mirrors;
1973 typeArrayOop _names; // needed to insulate method name against redefinition
1974 int _index;
1975 NoSafepointVerifier _nsv;
1976
1977 enum {
1978 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1979 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1980 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1981 trace_names_offset = java_lang_Throwable::trace_names_offset,
1982 trace_next_offset = java_lang_Throwable::trace_next_offset,
1983 trace_size = java_lang_Throwable::trace_size,
1984 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1985 };
1986
1987 // get info out of chunks
1988 static typeArrayOop get_methods(objArrayHandle chunk) {
1989 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1990 assert(methods != NULL, "method array should be initialized in backtrace");
1991 return methods;
1992 }
1993 static typeArrayOop get_bcis(objArrayHandle chunk) {
1994 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1995 assert(bcis != NULL, "bci array should be initialized in backtrace");
1996 return bcis;
1997 }
1998 static objArrayOop get_mirrors(objArrayHandle chunk) {
1999 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2000 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2001 return mirrors;
2002 }
2003 static typeArrayOop get_names(objArrayHandle chunk) {
2004 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2005 assert(names != NULL, "names array should be initialized in backtrace");
2006 return names;
2007 }
2008
2009 public:
2010
2011 // constructor for new backtrace
2012 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
2013 expand(CHECK);
2014 _backtrace = Handle(THREAD, _head);
2015 _index = 0;
2016 }
2017
2018 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2019 _methods = get_methods(backtrace);
2020 _bcis = get_bcis(backtrace);
2021 _mirrors = get_mirrors(backtrace);
2022 _names = get_names(backtrace);
2023 assert(_methods->length() == _bcis->length() &&
2024 _methods->length() == _mirrors->length() &&
2025 _mirrors->length() == _names->length(),
2026 "method and source information arrays should match");
2027
2028 // head is the preallocated backtrace
2029 _head = backtrace();
2030 _backtrace = Handle(thread, _head);
2031 _index = 0;
2032 }
2033
2034 void expand(TRAPS) {
2035 objArrayHandle old_head(THREAD, _head);
2036 PauseNoSafepointVerifier pnsv(&_nsv);
2037
2038 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2039 objArrayHandle new_head(THREAD, head);
2040
2041 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2042 typeArrayHandle new_methods(THREAD, methods);
2043
2044 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2045 typeArrayHandle new_bcis(THREAD, bcis);
2046
2047 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2048 objArrayHandle new_mirrors(THREAD, mirrors);
2049
2050 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2051 typeArrayHandle new_names(THREAD, names);
2052
2053 if (!old_head.is_null()) {
2054 old_head->obj_at_put(trace_next_offset, new_head());
2055 }
2056 new_head->obj_at_put(trace_methods_offset, new_methods());
2057 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2058 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2059 new_head->obj_at_put(trace_names_offset, new_names());
2060
2061 _head = new_head();
2062 _methods = new_methods();
2063 _bcis = new_bcis();
2064 _mirrors = new_mirrors();
2065 _names = new_names();
2066 _index = 0;
2067 }
2068
2069 oop backtrace() {
2070 return _backtrace();
2071 }
2072
2073 inline void push(Method* method, int bci, TRAPS) {
2074 // Smear the -1 bci to 0 since the array only holds unsigned
2075 // shorts. The later line number lookup would just smear the -1
2076 // to a 0 even if it could be recorded.
2077 if (bci == SynchronizationEntryBCI) bci = 0;
2078
2079 if (_index >= trace_chunk_size) {
2080 methodHandle mhandle(THREAD, method);
2081 expand(CHECK);
2082 method = mhandle();
2083 }
2084
2085 _methods->ushort_at_put(_index, method->orig_method_idnum());
2086 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2087
2088 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2089 // klass owning the symbols alive so their refcounts aren't decremented.
2090 Symbol* name = method->name();
2091 _names->symbol_at_put(_index, name);
2092
2093 // We need to save the mirrors in the backtrace to keep the class
2094 // from being unloaded while we still have this stack trace.
2095 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2096 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2097 _index++;
2098 }
2099
2100 };
2101
2102 struct BacktraceElement : public StackObj {
2103 int _method_id;
2104 int _bci;
2105 int _version;
2106 Symbol* _name;
2107 Handle _mirror;
2108 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2109 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2110 };
2111
2112 class BacktraceIterator : public StackObj {
2113 int _index;
2114 objArrayHandle _result;
2115 objArrayHandle _mirrors;
2116 typeArrayHandle _methods;
2117 typeArrayHandle _bcis;
2118 typeArrayHandle _names;
2119
2120 void init(objArrayHandle result, Thread* thread) {
2121 // Get method id, bci, version and mirror from chunk
2122 _result = result;
2123 if (_result.not_null()) {
2124 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2125 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2126 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2127 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2128 _index = 0;
2129 }
2130 }
2131 public:
2132 BacktraceIterator(objArrayHandle result, Thread* thread) {
2133 init(result, thread);
2134 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2135 }
2136
2137 BacktraceElement next(Thread* thread) {
2138 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2139 _methods->ushort_at(_index),
2140 Backtrace::version_at(_bcis->int_at(_index)),
2141 Backtrace::bci_at(_bcis->int_at(_index)),
2142 _names->symbol_at(_index));
2143 _index++;
2144
2145 if (_index >= java_lang_Throwable::trace_chunk_size) {
2146 int next_offset = java_lang_Throwable::trace_next_offset;
2147 // Get next chunk
2148 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2149 init(result, thread);
2150 }
2151 return e;
2152 }
2153
2154 bool repeat() {
2155 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2156 }
2157 };
2158
2159
2160 // Print stack trace element to resource allocated buffer
2161 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2162 int version, int bci, Symbol* name) {
2163 ResourceMark rm;
2164
2165 // Get strings and string lengths
2166 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2167 const char* klass_name = holder->external_name();
2168 int buf_len = (int)strlen(klass_name);
2169
2170 char* method_name = name->as_C_string();
2171 buf_len += (int)strlen(method_name);
2172
2173 char* source_file_name = NULL;
2174 Symbol* source = Backtrace::get_source_file_name(holder, version);
2175 if (source != NULL) {
2176 source_file_name = source->as_C_string();
2177 buf_len += (int)strlen(source_file_name);
2178 }
2179
2180 char *module_name = NULL, *module_version = NULL;
2181 ModuleEntry* module = holder->module();
2182 if (module->is_named()) {
2183 module_name = module->name()->as_C_string();
2184 buf_len += (int)strlen(module_name);
2185 if (module->version() != NULL) {
2186 module_version = module->version()->as_C_string();
2187 buf_len += (int)strlen(module_version);
2188 }
2189 }
2190
2191 // Allocate temporary buffer with extra space for formatting and line number
2192 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2193
2194 // Print stack trace line in buffer
2195 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2196
2197 // Print module information
2198 if (module_name != NULL) {
2199 if (module_version != NULL) {
2200 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2201 } else {
2202 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2203 }
2204 }
2205
2206 // The method can be NULL if the requested class version is gone
2207 Method* method = holder->method_with_orig_idnum(method_id, version);
2208 if (!version_matches(method, version)) {
2209 strcat(buf, "Redefined)");
2210 } else {
2211 int line_number = Backtrace::get_line_number(method, bci);
2212 if (line_number == -2) {
2213 strcat(buf, "Native Method)");
2214 } else {
2215 if (source_file_name != NULL && (line_number != -1)) {
2216 // Sourcename and linenumber
2217 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2218 } else if (source_file_name != NULL) {
2219 // Just sourcename
2220 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2221 } else {
2222 // Neither sourcename nor linenumber
2223 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2224 }
2225 CompiledMethod* nm = method->code();
2226 if (WizardMode && nm != NULL) {
2227 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2228 }
2229 }
2230 }
2231
2232 st->print_cr("%s", buf);
2233 }
2234
2235 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2236 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2237 int method_id = method->orig_method_idnum();
2238 int version = method->constants()->version();
2239 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2240 }
2241
2242 /**
2243 * Print the throwable message and its stack trace plus all causes by walking the
2244 * cause chain. The output looks the same as of Throwable.printStackTrace().
2245 */
2246 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2247 // First, print the message.
2248 print(throwable(), st);
2249 st->cr();
2250
2251 // Now print the stack trace.
2252 Thread* THREAD = Thread::current();
2253 while (throwable.not_null()) {
2254 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2255 if (result.is_null()) {
2256 st->print_raw_cr("\t<<no stack trace available>>");
2257 return;
2258 }
2259 BacktraceIterator iter(result, THREAD);
2260
2261 while (iter.repeat()) {
2262 BacktraceElement bte = iter.next(THREAD);
2263 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2264 }
2265 {
2266 // Call getCause() which doesn't necessarily return the _cause field.
2267 EXCEPTION_MARK;
2268 JavaValue cause(T_OBJECT);
2269 JavaCalls::call_virtual(&cause,
2270 throwable,
2271 throwable->klass(),
2272 vmSymbols::getCause_name(),
2273 vmSymbols::void_throwable_signature(),
2274 THREAD);
2275 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2276 if (HAS_PENDING_EXCEPTION) {
2277 CLEAR_PENDING_EXCEPTION;
2278 throwable = Handle();
2279 } else {
2280 throwable = Handle(THREAD, (oop) cause.get_jobject());
2281 if (throwable.not_null()) {
2282 st->print("Caused by: ");
2283 print(throwable(), st);
2284 st->cr();
2285 }
2286 }
2287 }
2288 }
2289 }
2290
2291 /**
2292 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2293 */
2294 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2295 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2296 JavaValue result(T_VOID);
2297 JavaCalls::call_virtual(&result,
2298 throwable,
2299 SystemDictionary::Throwable_klass(),
2300 vmSymbols::printStackTrace_name(),
2301 vmSymbols::void_method_signature(),
2302 THREAD);
2303 }
2304
2305 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2306 if (!StackTraceInThrowable) return;
2307 ResourceMark rm(THREAD);
2308
2309 // Start out by clearing the backtrace for this object, in case the VM
2310 // runs out of memory while allocating the stack trace
2311 set_backtrace(throwable(), NULL);
2312 // Clear lazily constructed Java level stacktrace if refilling occurs
2313 // This is unnecessary in 1.7+ but harmless
2314 clear_stacktrace(throwable());
2315
2316 int max_depth = MaxJavaStackTraceDepth;
2317 JavaThread* thread = (JavaThread*)THREAD;
2318
2319 BacktraceBuilder bt(CHECK);
2320
2321 // If there is no Java frame just return the method that was being called
2322 // with bci 0
2323 if (!thread->has_last_Java_frame()) {
2324 if (max_depth >= 1 && method() != NULL) {
2325 bt.push(method(), 0, CHECK);
2326 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2327 set_depth(throwable(), 1);
2328 set_backtrace(throwable(), bt.backtrace());
2329 }
2330 return;
2331 }
2332
2333 // Instead of using vframe directly, this version of fill_in_stack_trace
2334 // basically handles everything by hand. This significantly improved the
2335 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2336 // See bug 6333838 for more details.
2337 // The "ASSERT" here is to verify this method generates the exactly same stack
2338 // trace as utilizing vframe.
2339 #ifdef ASSERT
2340 vframeStream st(thread);
2341 methodHandle st_method(THREAD, st.method());
2342 #endif
2343 int total_count = 0;
2344 RegisterMap map(thread, false);
2345 int decode_offset = 0;
2346 CompiledMethod* nm = NULL;
2347 bool skip_fillInStackTrace_check = false;
2348 bool skip_throwableInit_check = false;
2349 bool skip_hidden = !ShowHiddenFrames;
2350
2351 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2352 Method* method = NULL;
2353 int bci = 0;
2354
2355 // Compiled java method case.
2356 if (decode_offset != 0) {
2357 DebugInfoReadStream stream(nm, decode_offset);
2358 decode_offset = stream.read_int();
2359 method = (Method*)nm->metadata_at(stream.read_int());
2360 bci = stream.read_bci();
2361 } else {
2362 if (fr.is_first_frame()) break;
2363 address pc = fr.pc();
2364 if (fr.is_interpreted_frame()) {
2365 address bcp = fr.interpreter_frame_bcp();
2366 method = fr.interpreter_frame_method();
2367 bci = method->bci_from(bcp);
2368 fr = fr.sender(&map);
2369 } else {
2370 CodeBlob* cb = fr.cb();
2371 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2372 // but non nmethod
2373 fr = fr.sender(&map);
2374 if (cb == NULL || !cb->is_compiled()) {
2375 continue;
2376 }
2377 nm = cb->as_compiled_method();
2378 if (nm->method()->is_native()) {
2379 method = nm->method();
2380 bci = 0;
2381 } else {
2382 PcDesc* pd = nm->pc_desc_at(pc);
2383 decode_offset = pd->scope_decode_offset();
2384 // if decode_offset is not equal to 0, it will execute the
2385 // "compiled java method case" at the beginning of the loop.
2386 continue;
2387 }
2388 }
2389 }
2390 #ifdef ASSERT
2391 assert(st_method() == method && st.bci() == bci,
2392 "Wrong stack trace");
2393 st.next();
2394 // vframeStream::method isn't GC-safe so store off a copy
2395 // of the Method* in case we GC.
2396 if (!st.at_end()) {
2397 st_method = st.method();
2398 }
2399 #endif
2400
2401 // the format of the stacktrace will be:
2402 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2403 // - 0 or more <init> methods for the exception class (skipped)
2404 // - rest of the stack
2405
2406 if (!skip_fillInStackTrace_check) {
2407 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2408 throwable->is_a(method->method_holder())) {
2409 continue;
2410 }
2411 else {
2412 skip_fillInStackTrace_check = true; // gone past them all
2413 }
2414 }
2415 if (!skip_throwableInit_check) {
2416 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2417
2418 // skip <init> methods of the exception class and superclasses
2419 // This is simlar to classic VM.
2420 if (method->name() == vmSymbols::object_initializer_name() &&
2421 throwable->is_a(method->method_holder())) {
2422 continue;
2423 } else {
2424 // there are none or we've seen them all - either way stop checking
2425 skip_throwableInit_check = true;
2426 }
2427 }
2428 if (method->is_hidden()) {
2429 if (skip_hidden) continue;
2430 }
2431 bt.push(method, bci, CHECK);
2432 total_count++;
2433 }
2434
2435 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2436
2437 // Put completed stack trace into throwable object
2438 set_backtrace(throwable(), bt.backtrace());
2439 set_depth(throwable(), total_count);
2440 }
2441
2442 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2443 // No-op if stack trace is disabled
2444 if (!StackTraceInThrowable) {
2445 return;
2446 }
2447
2448 // Disable stack traces for some preallocated out of memory errors
2449 if (!Universe::should_fill_in_stack_trace(throwable)) {
2450 return;
2451 }
2452
2453 PRESERVE_EXCEPTION_MARK;
2454
2455 JavaThread* thread = JavaThread::active();
2456 fill_in_stack_trace(throwable, method, thread);
2457 // ignore exceptions thrown during stack trace filling
2458 CLEAR_PENDING_EXCEPTION;
2459 }
2460
2461 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2462 // Allocate stack trace - backtrace is created but not filled in
2463
2464 // No-op if stack trace is disabled
2465 if (!StackTraceInThrowable) return;
2466 BacktraceBuilder bt(CHECK); // creates a backtrace
2467 set_backtrace(throwable(), bt.backtrace());
2468 }
2469
2470
2471 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2472 // Fill in stack trace into preallocated backtrace (no GC)
2473
2474 // No-op if stack trace is disabled
2475 if (!StackTraceInThrowable) return;
2476
2477 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2478
2479 JavaThread* THREAD = JavaThread::current();
2480
2481 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2482 assert(backtrace.not_null(), "backtrace should have been preallocated");
2483
2484 ResourceMark rm(THREAD);
2485 vframeStream st(THREAD);
2486
2487 BacktraceBuilder bt(THREAD, backtrace);
2488
2489 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2490 // methods as preallocated errors aren't created by "java" code.
2491
2492 // fill in as much stack trace as possible
2493 int chunk_count = 0;
2494 for (;!st.at_end(); st.next()) {
2495 bt.push(st.method(), st.bci(), CHECK);
2496 chunk_count++;
2497
2498 // Bail-out for deep stacks
2499 if (chunk_count >= trace_chunk_size) break;
2500 }
2501 set_depth(throwable(), chunk_count);
2502 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2503
2504 // We support the Throwable immutability protocol defined for Java 7.
2505 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2506 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2507 }
2508
2509 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2510 objArrayHandle stack_trace_array_h, TRAPS) {
2511
2512 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2513 THROW(vmSymbols::java_lang_NullPointerException());
2514 }
2515
2516 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2517
2518 if (stack_trace_array_h->length() != depth(throwable())) {
2519 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2520 }
2521
2522 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2523 BacktraceIterator iter(result, THREAD);
2524
2525 int index = 0;
2526 while (iter.repeat()) {
2527 BacktraceElement bte = iter.next(THREAD);
2528
2529 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2530
2531 if (stack_trace_element.is_null()) {
2532 THROW(vmSymbols::java_lang_NullPointerException());
2533 }
2534
2535 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2536 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2537
2538 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2539 method,
2540 bte._version,
2541 bte._bci,
2542 bte._name, CHECK);
2543 }
2544 }
2545
2546 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2547 // Allocate java.lang.StackTraceElement instance
2548 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2549 assert(k != NULL, "must be loaded in 1.4+");
2550 if (k->should_be_initialized()) {
2551 k->initialize(CHECK_0);
2552 }
2553
2554 Handle element = k->allocate_instance_handle(CHECK_0);
2555
2556 int version = method->constants()->version();
2557 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2558 return element();
2559 }
2560
2561 void java_lang_StackTraceElement::fill_in(Handle element,
2562 InstanceKlass* holder, const methodHandle& method,
2563 int version, int bci, Symbol* name, TRAPS) {
2564 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2565
2566 ResourceMark rm(THREAD);
2567 HandleMark hm(THREAD);
2568
2569 // Fill in class name
2570 Handle java_class(THREAD, holder->java_mirror());
2571 oop classname = java_lang_Class::name(java_class, CHECK);
2572 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2573 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2574
2575 oop loader = holder->class_loader();
2576 if (loader != NULL) {
2577 oop loader_name = java_lang_ClassLoader::name(loader);
2578 if (loader_name != NULL)
2579 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2580 }
2581
2582 // Fill in method name
2583 oop methodname = StringTable::intern(name, CHECK);
2584 java_lang_StackTraceElement::set_methodName(element(), methodname);
2585
2586 // Fill in module name and version
2587 ModuleEntry* module = holder->module();
2588 if (module->is_named()) {
2589 oop module_name = StringTable::intern(module->name(), CHECK);
2590 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2591 oop module_version;
2592 if (module->version() != NULL) {
2593 module_version = StringTable::intern(module->version(), CHECK);
2594 } else {
2595 module_version = NULL;
2596 }
2597 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2598 }
2599
2600 if (method() == NULL || !version_matches(method(), version)) {
2601 // The method was redefined, accurate line number information isn't available
2602 java_lang_StackTraceElement::set_fileName(element(), NULL);
2603 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2604 } else {
2605 // Fill in source file name and line number.
2606 Symbol* source = Backtrace::get_source_file_name(holder, version);
2607 oop source_file = java_lang_Class::source_file(java_class());
2608 if (source != NULL) {
2609 // Class was not redefined. We can trust its cache if set,
2610 // else we have to initialize it.
2611 if (source_file == NULL) {
2612 source_file = StringTable::intern(source, CHECK);
2613 java_lang_Class::set_source_file(java_class(), source_file);
2614 }
2615 } else {
2616 // Class was redefined. Dump the cache if it was set.
2617 if (source_file != NULL) {
2618 source_file = NULL;
2619 java_lang_Class::set_source_file(java_class(), source_file);
2620 }
2621 }
2622 java_lang_StackTraceElement::set_fileName(element(), source_file);
2623
2624 int line_number = Backtrace::get_line_number(method, bci);
2625 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2626 }
2627 }
2628
2629 #if INCLUDE_JVMCI
2630 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2631 int method_id = method->orig_method_idnum();
2632 int cpref = method->name_index();
2633 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2634 }
2635
2636 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2637 // Fill in class name
2638 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2639 Method* method = holder->method_with_orig_idnum(method_id, version);
2640
2641 // The method can be NULL if the requested class version is gone
2642 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2643
2644 // Fill in method name
2645 methodname = sym;
2646
2647 if (!version_matches(method, version)) {
2648 // If the method was redefined, accurate line number information isn't available
2649 filename = NULL;
2650 line_number = -1;
2651 } else {
2652 // Fill in source file name and line number.
2653 // Use a specific ik version as a holder since the mirror might
2654 // refer to a version that is now obsolete and no longer accessible
2655 // via the previous versions list.
2656 holder = holder->get_klass_version(version);
2657 assert(holder != NULL, "sanity check");
2658 filename = holder->source_file_name();
2659 line_number = Backtrace::get_line_number(method, bci);
2660 }
2661 }
2662 #endif // INCLUDE_JVMCI
2663
2664 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2665 HandleMark hm(THREAD);
2666 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2667 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2668 // we should expand MemberName::name when Throwable uses StackTrace
2669 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2670 return method;
2671 }
2672
2673 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2674 // set Method* or mid/cpref
2675 HandleMark hm(THREAD);
2676 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2677 InstanceKlass* ik = method->method_holder();
2678 CallInfo info(method(), ik, CHECK);
2679 MethodHandles::init_method_MemberName(mname, info);
2680 // set bci
2681 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2682 // method may be redefined; store the version
2683 int version = method->constants()->version();
2684 assert((jushort)version == version, "version should be short");
2685 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2686 }
2687
2688 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2689 ResourceMark rm(THREAD);
2690 HandleMark hm(THREAD);
2691 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2692 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2693 InstanceKlass* holder = InstanceKlass::cast(clazz);
2694 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2695
2696 short version = stackFrame->short_field(_version_offset);
2697 int bci = stackFrame->int_field(_bci_offset);
2698 Symbol* name = method->name();
2699 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2700 }
2701
2702 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2703 macro(_memberName_offset, k, "memberName", object_signature, false); \
2704 macro(_bci_offset, k, "bci", int_signature, false)
2705
2706 void java_lang_StackFrameInfo::compute_offsets() {
2707 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2708 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2709 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2710 }
2711
2712 #if INCLUDE_CDS
2713 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2714 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2715 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2716 }
2717 #endif
2718
2719 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2720 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2721 macro(_locals_offset, k, "locals", object_array_signature, false); \
2722 macro(_operands_offset, k, "operands", object_array_signature, false); \
2723 macro(_mode_offset, k, "mode", int_signature, false)
2724
2725 void java_lang_LiveStackFrameInfo::compute_offsets() {
2726 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2727 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2728 }
2729
2730 #if INCLUDE_CDS
2731 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2732 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2733 }
2734 #endif
2735
2736 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2737 macro(override_offset, k, "override", bool_signature, false)
2738
2739 void java_lang_reflect_AccessibleObject::compute_offsets() {
2740 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2741 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2742 }
2743
2744 #if INCLUDE_CDS
2745 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2746 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2747 }
2748 #endif
2749
2750 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2752 return (jboolean) reflect->bool_field(override_offset);
2753 }
2754
2755 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2757 reflect->bool_field_put(override_offset, (int) value);
2758 }
2759
2760 #define METHOD_FIELDS_DO(macro) \
2761 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2762 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2763 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2764 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2765 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2766 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2767 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2768 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2769 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2770 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2771 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2772
2773 void java_lang_reflect_Method::compute_offsets() {
2774 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2775 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2776 }
2777
2778 #if INCLUDE_CDS
2779 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2780 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2781 }
2782 #endif
2783
2784 Handle java_lang_reflect_Method::create(TRAPS) {
2785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2786 Klass* klass = SystemDictionary::reflect_Method_klass();
2787 // This class is eagerly initialized during VM initialization, since we keep a refence
2788 // to one of the methods
2789 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2790 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2791 }
2792
2793 oop java_lang_reflect_Method::clazz(oop reflect) {
2794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2795 return reflect->obj_field(clazz_offset);
2796 }
2797
2798 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2800 reflect->obj_field_put(clazz_offset, value);
2801 }
2802
2803 int java_lang_reflect_Method::slot(oop reflect) {
2804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2805 return reflect->int_field(slot_offset);
2806 }
2807
2808 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2810 reflect->int_field_put(slot_offset, value);
2811 }
2812
2813 void java_lang_reflect_Method::set_name(oop method, oop value) {
2814 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2815 method->obj_field_put(name_offset, value);
2816 }
2817
2818 oop java_lang_reflect_Method::return_type(oop method) {
2819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2820 return method->obj_field(returnType_offset);
2821 }
2822
2823 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2824 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2825 method->obj_field_put(returnType_offset, value);
2826 }
2827
2828 oop java_lang_reflect_Method::parameter_types(oop method) {
2829 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2830 return method->obj_field(parameterTypes_offset);
2831 }
2832
2833 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2834 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2835 method->obj_field_put(parameterTypes_offset, value);
2836 }
2837
2838 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2839 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2840 method->obj_field_put(exceptionTypes_offset, value);
2841 }
2842
2843 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2845 method->int_field_put(modifiers_offset, value);
2846 }
2847
2848 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2850 method->obj_field_put(signature_offset, value);
2851 }
2852
2853 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2855 method->obj_field_put(annotations_offset, value);
2856 }
2857
2858 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2859 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2860 method->obj_field_put(parameter_annotations_offset, value);
2861 }
2862
2863 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2864 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2865 method->obj_field_put(annotation_default_offset, value);
2866 }
2867
2868 #define CONSTRUCTOR_FIELDS_DO(macro) \
2869 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2870 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2871 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2872 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2873 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2874 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2875 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2876 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2877
2878 void java_lang_reflect_Constructor::compute_offsets() {
2879 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2880 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2881 }
2882
2883 #if INCLUDE_CDS
2884 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2885 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2886 }
2887 #endif
2888
2889 Handle java_lang_reflect_Constructor::create(TRAPS) {
2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2891 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2892 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2893 InstanceKlass* ik = InstanceKlass::cast(k);
2894 // Ensure it is initialized
2895 ik->initialize(CHECK_NH);
2896 return ik->allocate_instance_handle(THREAD);
2897 }
2898
2899 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2901 return reflect->obj_field(clazz_offset);
2902 }
2903
2904 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2906 reflect->obj_field_put(clazz_offset, value);
2907 }
2908
2909 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2911 return constructor->obj_field(parameterTypes_offset);
2912 }
2913
2914 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2916 constructor->obj_field_put(parameterTypes_offset, value);
2917 }
2918
2919 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2921 constructor->obj_field_put(exceptionTypes_offset, value);
2922 }
2923
2924 int java_lang_reflect_Constructor::slot(oop reflect) {
2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2926 return reflect->int_field(slot_offset);
2927 }
2928
2929 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2931 reflect->int_field_put(slot_offset, value);
2932 }
2933
2934 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2936 constructor->int_field_put(modifiers_offset, value);
2937 }
2938
2939 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2941 constructor->obj_field_put(signature_offset, value);
2942 }
2943
2944 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2946 constructor->obj_field_put(annotations_offset, value);
2947 }
2948
2949 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2951 method->obj_field_put(parameter_annotations_offset, value);
2952 }
2953
2954 #define FIELD_FIELDS_DO(macro) \
2955 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2956 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2957 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
2958 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2959 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2960 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2961 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
2962
2963 void java_lang_reflect_Field::compute_offsets() {
2964 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2965 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2966 }
2967
2968 #if INCLUDE_CDS
2969 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2970 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2971 }
2972 #endif
2973
2974 Handle java_lang_reflect_Field::create(TRAPS) {
2975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2976 Symbol* name = vmSymbols::java_lang_reflect_Field();
2977 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2978 InstanceKlass* ik = InstanceKlass::cast(k);
2979 // Ensure it is initialized
2980 ik->initialize(CHECK_NH);
2981 return ik->allocate_instance_handle(THREAD);
2982 }
2983
2984 oop java_lang_reflect_Field::clazz(oop reflect) {
2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2986 return reflect->obj_field(clazz_offset);
2987 }
2988
2989 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2991 reflect->obj_field_put(clazz_offset, value);
2992 }
2993
2994 oop java_lang_reflect_Field::name(oop field) {
2995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2996 return field->obj_field(name_offset);
2997 }
2998
2999 void java_lang_reflect_Field::set_name(oop field, oop value) {
3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3001 field->obj_field_put(name_offset, value);
3002 }
3003
3004 oop java_lang_reflect_Field::type(oop field) {
3005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3006 return field->obj_field(type_offset);
3007 }
3008
3009 void java_lang_reflect_Field::set_type(oop field, oop value) {
3010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3011 field->obj_field_put(type_offset, value);
3012 }
3013
3014 int java_lang_reflect_Field::slot(oop reflect) {
3015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3016 return reflect->int_field(slot_offset);
3017 }
3018
3019 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3021 reflect->int_field_put(slot_offset, value);
3022 }
3023
3024 int java_lang_reflect_Field::modifiers(oop field) {
3025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3026 return field->int_field(modifiers_offset);
3027 }
3028
3029 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3031 field->int_field_put(modifiers_offset, value);
3032 }
3033
3034 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3036 field->obj_field_put(signature_offset, value);
3037 }
3038
3039 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3041 field->obj_field_put(annotations_offset, value);
3042 }
3043
3044 #define CONSTANTPOOL_FIELDS_DO(macro) \
3045 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3046
3047 void reflect_ConstantPool::compute_offsets() {
3048 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3049 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3050 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3051 }
3052
3053 #if INCLUDE_CDS
3054 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3055 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3056 }
3057 #endif
3058
3059 #define PARAMETER_FIELDS_DO(macro) \
3060 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3061 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3062 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3063 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3064
3065 void java_lang_reflect_Parameter::compute_offsets() {
3066 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3067 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3068 }
3069
3070 #if INCLUDE_CDS
3071 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3072 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3073 }
3074 #endif
3075
3076 Handle java_lang_reflect_Parameter::create(TRAPS) {
3077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3078 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3079 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3080 InstanceKlass* ik = InstanceKlass::cast(k);
3081 // Ensure it is initialized
3082 ik->initialize(CHECK_NH);
3083 return ik->allocate_instance_handle(THREAD);
3084 }
3085
3086 oop java_lang_reflect_Parameter::name(oop param) {
3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3088 return param->obj_field(name_offset);
3089 }
3090
3091 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3093 param->obj_field_put(name_offset, value);
3094 }
3095
3096 int java_lang_reflect_Parameter::modifiers(oop param) {
3097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3098 return param->int_field(modifiers_offset);
3099 }
3100
3101 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3103 param->int_field_put(modifiers_offset, value);
3104 }
3105
3106 int java_lang_reflect_Parameter::index(oop param) {
3107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3108 return param->int_field(index_offset);
3109 }
3110
3111 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3113 param->int_field_put(index_offset, value);
3114 }
3115
3116 oop java_lang_reflect_Parameter::executable(oop param) {
3117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3118 return param->obj_field(executable_offset);
3119 }
3120
3121 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3123 param->obj_field_put(executable_offset, value);
3124 }
3125
3126
3127 int java_lang_Module::loader_offset;
3128 int java_lang_Module::name_offset;
3129 int java_lang_Module::_module_entry_offset = -1;
3130
3131 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3133 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3134 vmSymbols::java_lang_module_init_signature(),
3135 loader, module_name, CHECK_NH);
3136 }
3137
3138 #define MODULE_FIELDS_DO(macro) \
3139 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3140 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3141
3142 void java_lang_Module::compute_offsets() {
3143 InstanceKlass* k = SystemDictionary::Module_klass();
3144 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3145 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3146 }
3147
3148 #if INCLUDE_CDS
3149 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3150 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3151 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3152 }
3153 #endif
3154
3155 oop java_lang_Module::loader(oop module) {
3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3157 return module->obj_field(loader_offset);
3158 }
3159
3160 void java_lang_Module::set_loader(oop module, oop value) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 module->obj_field_put(loader_offset, value);
3163 }
3164
3165 oop java_lang_Module::name(oop module) {
3166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3167 return module->obj_field(name_offset);
3168 }
3169
3170 void java_lang_Module::set_name(oop module, oop value) {
3171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3172 module->obj_field_put(name_offset, value);
3173 }
3174
3175 ModuleEntry* java_lang_Module::module_entry(oop module) {
3176 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3177 assert(module != NULL, "module can't be null");
3178 assert(oopDesc::is_oop(module), "module must be oop");
3179
3180 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3181 if (module_entry == NULL) {
3182 // If the inject field containing the ModuleEntry* is null then return the
3183 // class loader's unnamed module.
3184 oop loader = java_lang_Module::loader(module);
3185 Handle h_loader = Handle(Thread::current(), loader);
3186 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3187 return loader_cld->unnamed_module();
3188 }
3189 return module_entry;
3190 }
3191
3192 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3193 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3194 assert(module != NULL, "module can't be null");
3195 assert(oopDesc::is_oop(module), "module must be oop");
3196 module->address_field_put(_module_entry_offset, (address)module_entry);
3197 }
3198
3199 Handle reflect_ConstantPool::create(TRAPS) {
3200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3201 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3202 // Ensure it is initialized
3203 k->initialize(CHECK_NH);
3204 return k->allocate_instance_handle(THREAD);
3205 }
3206
3207
3208 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3209 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3210 oop mirror = value->pool_holder()->java_mirror();
3211 // Save the mirror to get back the constant pool.
3212 reflect->obj_field_put(_oop_offset, mirror);
3213 }
3214
3215 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3216 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3217
3218 oop mirror = reflect->obj_field(_oop_offset);
3219 Klass* k = java_lang_Class::as_Klass(mirror);
3220 assert(k->is_instance_klass(), "Must be");
3221
3222 // Get the constant pool back from the klass. Since class redefinition
3223 // merges the new constant pool into the old, this is essentially the
3224 // same constant pool as the original. If constant pool merging is
3225 // no longer done in the future, this will have to change to save
3226 // the original.
3227 return InstanceKlass::cast(k)->constants();
3228 }
3229
3230 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3231 macro(_base_offset, k, "base", object_signature, false)
3232
3233 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3234 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3235 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3236 }
3237
3238 #if INCLUDE_CDS
3239 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3240 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3241 }
3242 #endif
3243
3244 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3245 Klass* k = SystemDictionary::box_klass(type);
3246 if (k == NULL) return NULL;
3247 InstanceKlass* ik = InstanceKlass::cast(k);
3248 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3249 return ik->allocate_instance(THREAD);
3250 }
3251
3252
3253 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3254 oop box = initialize_and_allocate(type, CHECK_0);
3255 if (box == NULL) return NULL;
3256 switch (type) {
3257 case T_BOOLEAN:
3258 box->bool_field_put(value_offset, value->z);
3259 break;
3260 case T_CHAR:
3261 box->char_field_put(value_offset, value->c);
3262 break;
3263 case T_FLOAT:
3264 box->float_field_put(value_offset, value->f);
3265 break;
3266 case T_DOUBLE:
3267 box->double_field_put(long_value_offset, value->d);
3268 break;
3269 case T_BYTE:
3270 box->byte_field_put(value_offset, value->b);
3271 break;
3272 case T_SHORT:
3273 box->short_field_put(value_offset, value->s);
3274 break;
3275 case T_INT:
3276 box->int_field_put(value_offset, value->i);
3277 break;
3278 case T_LONG:
3279 box->long_field_put(long_value_offset, value->j);
3280 break;
3281 default:
3282 return NULL;
3283 }
3284 return box;
3285 }
3286
3287
3288 BasicType java_lang_boxing_object::basic_type(oop box) {
3289 if (box == NULL) return T_ILLEGAL;
3290 BasicType type = SystemDictionary::box_klass_type(box->klass());
3291 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3292 return T_ILLEGAL;
3293 return type;
3294 }
3295
3296
3297 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3298 BasicType type = SystemDictionary::box_klass_type(box->klass());
3299 switch (type) {
3300 case T_BOOLEAN:
3301 value->z = box->bool_field(value_offset);
3302 break;
3303 case T_CHAR:
3304 value->c = box->char_field(value_offset);
3305 break;
3306 case T_FLOAT:
3307 value->f = box->float_field(value_offset);
3308 break;
3309 case T_DOUBLE:
3310 value->d = box->double_field(long_value_offset);
3311 break;
3312 case T_BYTE:
3313 value->b = box->byte_field(value_offset);
3314 break;
3315 case T_SHORT:
3316 value->s = box->short_field(value_offset);
3317 break;
3318 case T_INT:
3319 value->i = box->int_field(value_offset);
3320 break;
3321 case T_LONG:
3322 value->j = box->long_field(long_value_offset);
3323 break;
3324 default:
3325 return T_ILLEGAL;
3326 } // end switch
3327 return type;
3328 }
3329
3330
3331 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3332 BasicType type = SystemDictionary::box_klass_type(box->klass());
3333 switch (type) {
3334 case T_BOOLEAN:
3335 box->bool_field_put(value_offset, value->z);
3336 break;
3337 case T_CHAR:
3338 box->char_field_put(value_offset, value->c);
3339 break;
3340 case T_FLOAT:
3341 box->float_field_put(value_offset, value->f);
3342 break;
3343 case T_DOUBLE:
3344 box->double_field_put(long_value_offset, value->d);
3345 break;
3346 case T_BYTE:
3347 box->byte_field_put(value_offset, value->b);
3348 break;
3349 case T_SHORT:
3350 box->short_field_put(value_offset, value->s);
3351 break;
3352 case T_INT:
3353 box->int_field_put(value_offset, value->i);
3354 break;
3355 case T_LONG:
3356 box->long_field_put(long_value_offset, value->j);
3357 break;
3358 default:
3359 return T_ILLEGAL;
3360 } // end switch
3361 return type;
3362 }
3363
3364
3365 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3366 switch (type) {
3367 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3368 case T_CHAR: st->print("%d", value->c); break;
3369 case T_BYTE: st->print("%d", value->b); break;
3370 case T_SHORT: st->print("%d", value->s); break;
3371 case T_INT: st->print("%d", value->i); break;
3372 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3373 case T_FLOAT: st->print("%f", value->f); break;
3374 case T_DOUBLE: st->print("%lf", value->d); break;
3375 default: st->print("type %d?", type); break;
3376 }
3377 }
3378
3379 // Support for java_lang_ref_Reference
3380
3381 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3382 assert(obj != NULL, "sanity");
3383 if (offset != java_lang_ref_Reference::referent_offset) {
3384 return false;
3385 }
3386
3387 Klass* k = obj->klass();
3388 if (!k->is_instance_klass()) {
3389 return false;
3390 }
3391
3392 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3393 bool is_reference = ik->reference_type() != REF_NONE;
3394 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3395 return is_reference;
3396 }
3397
3398 // Support for java_lang_ref_SoftReference
3399 //
3400
3401 #define SOFTREFERENCE_FIELDS_DO(macro) \
3402 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3403 macro(static_clock_offset, k, "clock", long_signature, true)
3404
3405 void java_lang_ref_SoftReference::compute_offsets() {
3406 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3407 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3408 }
3409
3410 #if INCLUDE_CDS
3411 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3412 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3413 }
3414 #endif
3415
3416 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3417 return ref->long_field(timestamp_offset);
3418 }
3419
3420 jlong java_lang_ref_SoftReference::clock() {
3421 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3422 oop base = ik->static_field_base_raw();
3423 return base->long_field(static_clock_offset);
3424 }
3425
3426 void java_lang_ref_SoftReference::set_clock(jlong value) {
3427 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3428 oop base = ik->static_field_base_raw();
3429 base->long_field_put(static_clock_offset, value);
3430 }
3431
3432 // Support for java_lang_invoke_DirectMethodHandle
3433
3434 int java_lang_invoke_DirectMethodHandle::_member_offset;
3435
3436 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3437 oop member_name = NULL;
3438 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3439 "a DirectMethodHandle oop is expected");
3440 return dmh->obj_field(member_offset_in_bytes());
3441 }
3442
3443 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3444 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3445
3446 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3447 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3448 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3449 }
3450
3451 #if INCLUDE_CDS
3452 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3453 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3454 }
3455 #endif
3456
3457 // Support for java_lang_invoke_MethodHandle
3458
3459 int java_lang_invoke_MethodHandle::_type_offset;
3460 int java_lang_invoke_MethodHandle::_form_offset;
3461
3462 int java_lang_invoke_MemberName::_clazz_offset;
3463 int java_lang_invoke_MemberName::_name_offset;
3464 int java_lang_invoke_MemberName::_type_offset;
3465 int java_lang_invoke_MemberName::_flags_offset;
3466 int java_lang_invoke_MemberName::_method_offset;
3467 int java_lang_invoke_MemberName::_vmindex_offset;
3468
3469 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3470 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3471
3472 int java_lang_invoke_LambdaForm::_vmentry_offset;
3473
3474 #define METHODHANDLE_FIELDS_DO(macro) \
3475 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3476 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3477
3478 void java_lang_invoke_MethodHandle::compute_offsets() {
3479 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3480 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3481 }
3482
3483 #if INCLUDE_CDS
3484 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3485 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3486 }
3487 #endif
3488
3489 #define MEMBERNAME_FIELDS_DO(macro) \
3490 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3491 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3492 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3493 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3494 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3495
3496 void java_lang_invoke_MemberName::compute_offsets() {
3497 InstanceKlass* k = SystemDictionary::MemberName_klass();
3498 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3499 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3500 }
3501
3502 #if INCLUDE_CDS
3503 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3504 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3505 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3506 }
3507 #endif
3508
3509 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3510 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3511 assert(k != NULL, "jdk mismatch");
3512 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3513 }
3514
3515 #if INCLUDE_CDS
3516 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3517 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3518 }
3519 #endif
3520
3521 #define LAMBDAFORM_FIELDS_DO(macro) \
3522 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3523
3524 void java_lang_invoke_LambdaForm::compute_offsets() {
3525 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3526 assert (k != NULL, "jdk mismatch");
3527 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3528 }
3529
3530 #if INCLUDE_CDS
3531 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3532 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3533 }
3534 #endif
3535
3536 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3537 return obj != NULL && is_subclass(obj->klass());
3538 }
3539
3540
3541 oop java_lang_invoke_MethodHandle::type(oop mh) {
3542 return mh->obj_field(_type_offset);
3543 }
3544
3545 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3546 mh->obj_field_put(_type_offset, mtype);
3547 }
3548
3549 oop java_lang_invoke_MethodHandle::form(oop mh) {
3550 assert(_form_offset != 0, "");
3551 return mh->obj_field(_form_offset);
3552 }
3553
3554 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3555 assert(_form_offset != 0, "");
3556 mh->obj_field_put(_form_offset, lform);
3557 }
3558
3559 /// MemberName accessors
3560
3561 oop java_lang_invoke_MemberName::clazz(oop mname) {
3562 assert(is_instance(mname), "wrong type");
3563 return mname->obj_field(_clazz_offset);
3564 }
3565
3566 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3567 assert(is_instance(mname), "wrong type");
3568 mname->obj_field_put(_clazz_offset, clazz);
3569 }
3570
3571 oop java_lang_invoke_MemberName::name(oop mname) {
3572 assert(is_instance(mname), "wrong type");
3573 return mname->obj_field(_name_offset);
3574 }
3575
3576 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3577 assert(is_instance(mname), "wrong type");
3578 mname->obj_field_put(_name_offset, name);
3579 }
3580
3581 oop java_lang_invoke_MemberName::type(oop mname) {
3582 assert(is_instance(mname), "wrong type");
3583 return mname->obj_field(_type_offset);
3584 }
3585
3586 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3587 assert(is_instance(mname), "wrong type");
3588 mname->obj_field_put(_type_offset, type);
3589 }
3590
3591 int java_lang_invoke_MemberName::flags(oop mname) {
3592 assert(is_instance(mname), "wrong type");
3593 return mname->int_field(_flags_offset);
3594 }
3595
3596 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3597 assert(is_instance(mname), "wrong type");
3598 mname->int_field_put(_flags_offset, flags);
3599 }
3600
3601
3602 // Return vmtarget from ResolvedMethodName method field through indirection
3603 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3604 assert(is_instance(mname), "wrong type");
3605 oop method = mname->obj_field(_method_offset);
3606 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3607 }
3608
3609 bool java_lang_invoke_MemberName::is_method(oop mname) {
3610 assert(is_instance(mname), "must be MemberName");
3611 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3612 }
3613
3614 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3615 assert(is_instance(mname), "wrong type");
3616 mname->obj_field_put(_method_offset, resolved_method);
3617 }
3618
3619 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3620 assert(is_instance(mname), "wrong type");
3621 return (intptr_t) mname->address_field(_vmindex_offset);
3622 }
3623
3624 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3625 assert(is_instance(mname), "wrong type");
3626 mname->address_field_put(_vmindex_offset, (address) index);
3627 }
3628
3629
3630 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3631 assert(is_instance(resolved_method), "wrong type");
3632 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3633 assert(m->is_method(), "must be");
3634 return m;
3635 }
3636
3637 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3638 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3639 assert(is_instance(resolved_method), "wrong type");
3640 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3641 }
3642
3643 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3644 assert(is_instance(resolved_method), "wrong type");
3645 resolved_method->obj_field_put(_vmholder_offset, holder);
3646 }
3647
3648 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3649 const Method* method = m();
3650
3651 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3652 oop resolved_method = ResolvedMethodTable::find_method(method);
3653 if (resolved_method != NULL) {
3654 return resolved_method;
3655 }
3656
3657 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3658 if (!k->is_initialized()) {
3659 k->initialize(CHECK_NULL);
3660 }
3661
3662 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3663
3664 NoSafepointVerifier nsv;
3665
3666 if (method->is_old()) {
3667 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3668 method->get_new_method();
3669 }
3670
3671 InstanceKlass* holder = method->method_holder();
3672
3673 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3674 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3675 // distinct loaders) to ensure the metadata is kept alive.
3676 // This mirror may be different than the one in clazz field.
3677 set_vmholder(new_resolved_method, holder->java_mirror());
3678
3679 // Set flag in class to indicate this InstanceKlass has entries in the table
3680 // to avoid walking table during redefinition if none of the redefined classes
3681 // have any membernames in the table.
3682 holder->set_has_resolved_methods();
3683
3684 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3685 }
3686
3687 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3688 assert(is_instance(lform), "wrong type");
3689 return lform->obj_field(_vmentry_offset);
3690 }
3691
3692
3693 // Support for java_lang_invoke_MethodType
3694
3695 int java_lang_invoke_MethodType::_rtype_offset;
3696 int java_lang_invoke_MethodType::_ptypes_offset;
3697
3698 #define METHODTYPE_FIELDS_DO(macro) \
3699 macro(_rtype_offset, k, "rtype", class_signature, false); \
3700 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3701
3702 void java_lang_invoke_MethodType::compute_offsets() {
3703 InstanceKlass* k = SystemDictionary::MethodType_klass();
3704 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3705 }
3706
3707 #if INCLUDE_CDS
3708 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3709 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3710 }
3711 #endif
3712
3713 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3714 st->print("(");
3715 objArrayOop pts = ptypes(mt);
3716 for (int i = 0, limit = pts->length(); i < limit; i++) {
3717 java_lang_Class::print_signature(pts->obj_at(i), st);
3718 }
3719 st->print(")");
3720 java_lang_Class::print_signature(rtype(mt), st);
3721 }
3722
3723 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3724 ResourceMark rm;
3725 stringStream buffer(128);
3726 print_signature(mt, &buffer);
3727 const char* sigstr = buffer.base();
3728 int siglen = (int) buffer.size();
3729 Symbol *name;
3730 if (!intern_if_not_found) {
3731 name = SymbolTable::probe(sigstr, siglen);
3732 } else {
3733 name = SymbolTable::new_symbol(sigstr, siglen);
3734 }
3735 return name;
3736 }
3737
3738 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3739 if (mt1 == mt2)
3740 return true;
3741 if (rtype(mt1) != rtype(mt2))
3742 return false;
3743 if (ptype_count(mt1) != ptype_count(mt2))
3744 return false;
3745 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3746 if (ptype(mt1, i) != ptype(mt2, i))
3747 return false;
3748 }
3749 return true;
3750 }
3751
3752 oop java_lang_invoke_MethodType::rtype(oop mt) {
3753 assert(is_instance(mt), "must be a MethodType");
3754 return mt->obj_field(_rtype_offset);
3755 }
3756
3757 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3758 assert(is_instance(mt), "must be a MethodType");
3759 return (objArrayOop) mt->obj_field(_ptypes_offset);
3760 }
3761
3762 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3763 return ptypes(mt)->obj_at(idx);
3764 }
3765
3766 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3767 return ptypes(mt)->length();
3768 }
3769
3770 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3771 objArrayOop pts = ptypes(mt);
3772 int count = pts->length();
3773 int slots = 0;
3774 for (int i = 0; i < count; i++) {
3775 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3776 slots += type2size[bt];
3777 }
3778 return slots;
3779 }
3780
3781 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3782 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3783 return type2size[bt];
3784 }
3785
3786
3787 // Support for java_lang_invoke_CallSite
3788
3789 int java_lang_invoke_CallSite::_target_offset;
3790 int java_lang_invoke_CallSite::_context_offset;
3791
3792 #define CALLSITE_FIELDS_DO(macro) \
3793 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3794 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3795
3796 void java_lang_invoke_CallSite::compute_offsets() {
3797 InstanceKlass* k = SystemDictionary::CallSite_klass();
3798 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3799 }
3800
3801 #if INCLUDE_CDS
3802 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3803 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3804 }
3805 #endif
3806
3807 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3808 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3809
3810 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3811 return dep_oop;
3812 }
3813
3814 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3815
3816 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3817 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3818
3819 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3820 InstanceKlass* k = SystemDictionary::Context_klass();
3821 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3822 }
3823
3824 #if INCLUDE_CDS
3825 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3826 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3827 }
3828 #endif
3829
3830 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3831 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3832 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3833 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3834 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3835 return dep_ctx;
3836 }
3837
3838 // Support for java_security_AccessControlContext
3839
3840 int java_security_AccessControlContext::_context_offset = 0;
3841 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3842 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3843 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3844
3845 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3846 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3847 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3848 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3849 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3850
3851 void java_security_AccessControlContext::compute_offsets() {
3852 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3853 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3854 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3855 }
3856
3857 #if INCLUDE_CDS
3858 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3859 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3860 }
3861 #endif
3862
3863 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3864 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3865 // Ensure klass is initialized
3866 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3867 // Allocate result
3868 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3869 // Fill in values
3870 result->obj_field_put(_context_offset, context());
3871 result->obj_field_put(_privilegedContext_offset, privileged_context());
3872 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3873 // whitelist AccessControlContexts created by the JVM if present
3874 if (_isAuthorized_offset != -1) {
3875 result->bool_field_put(_isAuthorized_offset, true);
3876 }
3877 return result;
3878 }
3879
3880
3881 // Support for java_lang_ClassLoader
3882
3883 bool java_lang_ClassLoader::offsets_computed = false;
3884 int java_lang_ClassLoader::_loader_data_offset = -1;
3885 int java_lang_ClassLoader::parallelCapable_offset = -1;
3886 int java_lang_ClassLoader::name_offset = -1;
3887 int java_lang_ClassLoader::nameAndId_offset = -1;
3888 int java_lang_ClassLoader::unnamedModule_offset = -1;
3889
3890 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3891 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3892 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3893 }
3894
3895 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3896 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3897 return RawAccess<>::load_at(loader, _loader_data_offset);
3898 }
3899
3900 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3901 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3902 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3903 }
3904
3905 #define CLASSLOADER_FIELDS_DO(macro) \
3906 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3907 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3908 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3909 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3910 macro(parent_offset, k1, "parent", classloader_signature, false)
3911
3912 void java_lang_ClassLoader::compute_offsets() {
3913 assert(!offsets_computed, "offsets should be initialized only once");
3914 offsets_computed = true;
3915
3916 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3917 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3918
3919 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3920 }
3921
3922 #if INCLUDE_CDS
3923 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3924 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3925 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3926 }
3927 #endif
3928
3929 oop java_lang_ClassLoader::parent(oop loader) {
3930 assert(is_instance(loader), "loader must be oop");
3931 return loader->obj_field(parent_offset);
3932 }
3933
3934 // Returns the name field of this class loader. If the name field has not
3935 // been set, null will be returned.
3936 oop java_lang_ClassLoader::name(oop loader) {
3937 assert(is_instance(loader), "loader must be oop");
3938 return loader->obj_field(name_offset);
3939 }
3940
3941 // Returns the nameAndId field of this class loader. The format is
3942 // as follows:
3943 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3944 // If the defining loader has no name then <qualified-class-name> @<id>
3945 // If built-in loader, then omit '@<id>' as there is only one instance.
3946 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3947 oop java_lang_ClassLoader::nameAndId(oop loader) {
3948 assert(is_instance(loader), "loader must be oop");
3949 return loader->obj_field(nameAndId_offset);
3950 }
3951
3952 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3953 assert(is_instance(loader), "loader must be oop");
3954 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3955 oop acl = loader;
3956 debug_only(jint loop_count = 0);
3957 // This loop taken verbatim from ClassLoader.java:
3958 do {
3959 acl = parent(acl);
3960 if (cl == acl) {
3961 return true;
3962 }
3963 assert(++loop_count > 0, "loop_count overflow");
3964 } while (acl != NULL);
3965 return false;
3966 }
3967
3968 bool java_lang_ClassLoader::is_instance(oop obj) {
3969 return obj != NULL && is_subclass(obj->klass());
3970 }
3971
3972
3973 // For class loader classes, parallelCapable defined
3974 // based on non-null field
3975 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3976 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3977 if (parallelCapable_offset == -1) {
3978 // Default for backward compatibility is false
3979 return false;
3980 }
3981 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3982 }
3983
3984 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3985 // Fix for 4474172; see evaluation for more details
3986 loader = non_reflection_class_loader(loader);
3987
3988 oop cl = SystemDictionary::java_system_loader();
3989 while(cl != NULL) {
3990 if (cl == loader) return true;
3991 cl = parent(cl);
3992 }
3993 return false;
3994 }
3995
3996 // Return true if this is one of the class loaders associated with
3997 // the generated bytecodes for reflection.
3998 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3999 if (loader != NULL) {
4000 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4001 // This might be null in non-1.4 JDKs
4002 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4003 }
4004 return false;
4005 }
4006
4007 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4008 // See whether this is one of the class loaders associated with
4009 // the generated bytecodes for reflection, and if so, "magically"
4010 // delegate to its parent to prevent class loading from occurring
4011 // in places where applications using reflection didn't expect it.
4012 if (is_reflection_class_loader(loader)) {
4013 return parent(loader);
4014 }
4015 return loader;
4016 }
4017
4018 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4019 assert(is_instance(loader), "loader must be oop");
4020 return loader->obj_field(unnamedModule_offset);
4021 }
4022
4023 // Support for java_lang_System
4024 //
4025 #define SYSTEM_FIELDS_DO(macro) \
4026 macro(static_in_offset, k, "in", input_stream_signature, true); \
4027 macro(static_out_offset, k, "out", print_stream_signature, true); \
4028 macro(static_err_offset, k, "err", print_stream_signature, true); \
4029 macro(static_security_offset, k, "security", security_manager_signature, true)
4030
4031 void java_lang_System::compute_offsets() {
4032 InstanceKlass* k = SystemDictionary::System_klass();
4033 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4034 }
4035
4036 #if INCLUDE_CDS
4037 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4038 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4039 }
4040 #endif
4041
4042 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4043 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4044 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4045
4046 // Support for jdk_internal_misc_UnsafeConstants
4047 //
4048 class UnsafeConstantsFixup : public FieldClosure {
4049 private:
4050 int _address_size;
4051 int _page_size;
4052 bool _big_endian;
4053 bool _use_unaligned_access;
4054 int _data_cache_line_flush_size;
4055 public:
4056 UnsafeConstantsFixup() {
4057 // round up values for all static final fields
4058 _address_size = sizeof(void*);
4059 _page_size = os::vm_page_size();
4060 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4061 _use_unaligned_access = UseUnalignedAccesses;
4062 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4063 }
4064
4065 void do_field(fieldDescriptor* fd) {
4066 oop mirror = fd->field_holder()->java_mirror();
4067 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4068 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4069 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4070 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4071 if (fd->name() == vmSymbols::address_size_name()) {
4072 mirror->int_field_put(fd->offset(), _address_size);
4073 } else if (fd->name() == vmSymbols::page_size_name()) {
4074 mirror->int_field_put(fd->offset(), _page_size);
4075 } else if (fd->name() == vmSymbols::big_endian_name()) {
4076 mirror->bool_field_put(fd->offset(), _big_endian);
4077 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4078 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4079 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4080 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4081 } else {
4082 assert(false, "unexpected UnsafeConstants field");
4083 }
4084 }
4085 };
4086
4087 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4088 UnsafeConstantsFixup fixup;
4089 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4090 }
4091
4092 int java_lang_Class::_klass_offset;
4093 int java_lang_Class::_array_klass_offset;
4094 int java_lang_Class::_oop_size_offset;
4095 int java_lang_Class::_static_oop_field_count_offset;
4096 int java_lang_Class::_class_loader_offset;
4097 int java_lang_Class::_module_offset;
4098 int java_lang_Class::_protection_domain_offset;
4099 int java_lang_Class::_component_mirror_offset;
4100 int java_lang_Class::_init_lock_offset;
4101 int java_lang_Class::_signers_offset;
4102 int java_lang_Class::_name_offset;
4103 int java_lang_Class::_source_file_offset;
4104 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4105 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4106 int java_lang_Throwable::backtrace_offset;
4107 int java_lang_Throwable::detailMessage_offset;
4108 int java_lang_Throwable::stackTrace_offset;
4109 int java_lang_Throwable::depth_offset;
4110 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4111 int java_lang_reflect_AccessibleObject::override_offset;
4112 int java_lang_reflect_Method::clazz_offset;
4113 int java_lang_reflect_Method::name_offset;
4114 int java_lang_reflect_Method::returnType_offset;
4115 int java_lang_reflect_Method::parameterTypes_offset;
4116 int java_lang_reflect_Method::exceptionTypes_offset;
4117 int java_lang_reflect_Method::slot_offset;
4118 int java_lang_reflect_Method::modifiers_offset;
4119 int java_lang_reflect_Method::signature_offset;
4120 int java_lang_reflect_Method::annotations_offset;
4121 int java_lang_reflect_Method::parameter_annotations_offset;
4122 int java_lang_reflect_Method::annotation_default_offset;
4123 int java_lang_reflect_Constructor::clazz_offset;
4124 int java_lang_reflect_Constructor::parameterTypes_offset;
4125 int java_lang_reflect_Constructor::exceptionTypes_offset;
4126 int java_lang_reflect_Constructor::slot_offset;
4127 int java_lang_reflect_Constructor::modifiers_offset;
4128 int java_lang_reflect_Constructor::signature_offset;
4129 int java_lang_reflect_Constructor::annotations_offset;
4130 int java_lang_reflect_Constructor::parameter_annotations_offset;
4131 int java_lang_reflect_Field::clazz_offset;
4132 int java_lang_reflect_Field::name_offset;
4133 int java_lang_reflect_Field::type_offset;
4134 int java_lang_reflect_Field::slot_offset;
4135 int java_lang_reflect_Field::modifiers_offset;
4136 int java_lang_reflect_Field::signature_offset;
4137 int java_lang_reflect_Field::annotations_offset;
4138 int java_lang_reflect_Parameter::name_offset;
4139 int java_lang_reflect_Parameter::modifiers_offset;
4140 int java_lang_reflect_Parameter::index_offset;
4141 int java_lang_reflect_Parameter::executable_offset;
4142 int java_lang_boxing_object::value_offset;
4143 int java_lang_boxing_object::long_value_offset;
4144 int java_lang_ref_Reference::referent_offset;
4145 int java_lang_ref_Reference::queue_offset;
4146 int java_lang_ref_Reference::next_offset;
4147 int java_lang_ref_Reference::discovered_offset;
4148 int java_lang_ref_SoftReference::timestamp_offset;
4149 int java_lang_ref_SoftReference::static_clock_offset;
4150 int java_lang_ClassLoader::parent_offset;
4151 int java_lang_System::static_in_offset;
4152 int java_lang_System::static_out_offset;
4153 int java_lang_System::static_err_offset;
4154 int java_lang_System::static_security_offset;
4155 int java_lang_StackTraceElement::methodName_offset;
4156 int java_lang_StackTraceElement::fileName_offset;
4157 int java_lang_StackTraceElement::lineNumber_offset;
4158 int java_lang_StackTraceElement::moduleName_offset;
4159 int java_lang_StackTraceElement::moduleVersion_offset;
4160 int java_lang_StackTraceElement::classLoaderName_offset;
4161 int java_lang_StackTraceElement::declaringClass_offset;
4162 int java_lang_StackTraceElement::declaringClassObject_offset;
4163 int java_lang_StackFrameInfo::_memberName_offset;
4164 int java_lang_StackFrameInfo::_bci_offset;
4165 int java_lang_StackFrameInfo::_version_offset;
4166 int java_lang_LiveStackFrameInfo::_monitors_offset;
4167 int java_lang_LiveStackFrameInfo::_locals_offset;
4168 int java_lang_LiveStackFrameInfo::_operands_offset;
4169 int java_lang_LiveStackFrameInfo::_mode_offset;
4170 int java_lang_AssertionStatusDirectives::classes_offset;
4171 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4172 int java_lang_AssertionStatusDirectives::packages_offset;
4173 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4174 int java_lang_AssertionStatusDirectives::deflt_offset;
4175 int java_nio_Buffer::_limit_offset;
4176 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4177 int reflect_ConstantPool::_oop_offset;
4178 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4179 int java_lang_Integer_IntegerCache::_static_cache_offset;
4180 int java_lang_Long_LongCache::_static_cache_offset;
4181 int java_lang_Character_CharacterCache::_static_cache_offset;
4182 int java_lang_Short_ShortCache::_static_cache_offset;
4183 int java_lang_Byte_ByteCache::_static_cache_offset;
4184 int java_lang_Boolean::_static_TRUE_offset;
4185 int java_lang_Boolean::_static_FALSE_offset;
4186
4187
4188
4189 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4190 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4191 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4192 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4193 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4194 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4195 macro(methodName_offset, k, "methodName", string_signature, false); \
4196 macro(fileName_offset, k, "fileName", string_signature, false); \
4197 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4198
4199 // Support for java_lang_StackTraceElement
4200 void java_lang_StackTraceElement::compute_offsets() {
4201 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4202 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4203 }
4204
4205 #if INCLUDE_CDS
4206 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4207 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4208 }
4209 #endif
4210
4211 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4212 element->obj_field_put(fileName_offset, value);
4213 }
4214
4215 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4216 element->obj_field_put(declaringClass_offset, value);
4217 }
4218
4219 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4220 element->obj_field_put(methodName_offset, value);
4221 }
4222
4223 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4224 element->int_field_put(lineNumber_offset, value);
4225 }
4226
4227 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4228 element->obj_field_put(moduleName_offset, value);
4229 }
4230
4231 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4232 element->obj_field_put(moduleVersion_offset, value);
4233 }
4234
4235 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4236 element->obj_field_put(classLoaderName_offset, value);
4237 }
4238
4239 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4240 element->obj_field_put(declaringClassObject_offset, value);
4241 }
4242
4243 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4244 element->short_field_put(_version_offset, value);
4245 }
4246
4247 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4248 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4249 element->int_field_put(_bci_offset, value);
4250 }
4251
4252 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4253 element->obj_field_put(_monitors_offset, value);
4254 }
4255
4256 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4257 element->obj_field_put(_locals_offset, value);
4258 }
4259
4260 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4261 element->obj_field_put(_operands_offset, value);
4262 }
4263
4264 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4265 element->int_field_put(_mode_offset, value);
4266 }
4267
4268 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4269 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4270 macro(classes_offset, k, "classes", string_array_signature, false); \
4271 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4272 macro(packages_offset, k, "packages", string_array_signature, false); \
4273 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4274 macro(deflt_offset, k, "deflt", bool_signature, false)
4275
4276 void java_lang_AssertionStatusDirectives::compute_offsets() {
4277 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4278 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4279 }
4280
4281 #if INCLUDE_CDS
4282 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4283 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4284 }
4285 #endif
4286
4287 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4288 o->obj_field_put(classes_offset, val);
4289 }
4290
4291 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4292 o->obj_field_put(classEnabled_offset, val);
4293 }
4294
4295 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4296 o->obj_field_put(packages_offset, val);
4297 }
4298
4299 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4300 o->obj_field_put(packageEnabled_offset, val);
4301 }
4302
4303 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4304 o->bool_field_put(deflt_offset, val);
4305 }
4306
4307
4308 // Support for intrinsification of java.nio.Buffer.checkIndex
4309 int java_nio_Buffer::limit_offset() {
4310 return _limit_offset;
4311 }
4312
4313 #define BUFFER_FIELDS_DO(macro) \
4314 macro(_limit_offset, k, "limit", int_signature, false)
4315
4316 void java_nio_Buffer::compute_offsets() {
4317 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4318 assert(k != NULL, "must be loaded in 1.4+");
4319 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4320 }
4321
4322 #if INCLUDE_CDS
4323 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4324 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4325 }
4326 #endif
4327
4328 #define AOS_FIELDS_DO(macro) \
4329 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4330
4331 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4332 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4333 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4334 }
4335
4336 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4337 assert(_owner_offset != 0, "Must be initialized");
4338 return obj->obj_field(_owner_offset);
4339 }
4340
4341 #if INCLUDE_CDS
4342 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4343 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4344 }
4345 #endif
4346
4347 #define INTEGER_CACHE_FIELDS_DO(macro) \
4348 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4349
4350 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4351 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4352 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4353 }
4354
4355 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4356 oop base = ik->static_field_base_raw();
4357 return objArrayOop(base->obj_field(_static_cache_offset));
4358 }
4359
4360 Symbol* java_lang_Integer_IntegerCache::symbol() {
4361 return vmSymbols::java_lang_Integer_IntegerCache();
4362 }
4363
4364 #if INCLUDE_CDS
4365 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4366 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4367 }
4368 #endif
4369 #undef INTEGER_CACHE_FIELDS_DO
4370
4371 jint java_lang_Integer::value(oop obj) {
4372 jvalue v;
4373 java_lang_boxing_object::get_value(obj, &v);
4374 return v.i;
4375 }
4376
4377 #define LONG_CACHE_FIELDS_DO(macro) \
4378 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4379
4380 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4381 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4382 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4383 }
4384
4385 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4386 oop base = ik->static_field_base_raw();
4387 return objArrayOop(base->obj_field(_static_cache_offset));
4388 }
4389
4390 Symbol* java_lang_Long_LongCache::symbol() {
4391 return vmSymbols::java_lang_Long_LongCache();
4392 }
4393
4394 #if INCLUDE_CDS
4395 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4396 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4397 }
4398 #endif
4399 #undef LONG_CACHE_FIELDS_DO
4400
4401 jlong java_lang_Long::value(oop obj) {
4402 jvalue v;
4403 java_lang_boxing_object::get_value(obj, &v);
4404 return v.j;
4405 }
4406
4407 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4408 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4409
4410 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4411 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4412 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4413 }
4414
4415 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4416 oop base = ik->static_field_base_raw();
4417 return objArrayOop(base->obj_field(_static_cache_offset));
4418 }
4419
4420 Symbol* java_lang_Character_CharacterCache::symbol() {
4421 return vmSymbols::java_lang_Character_CharacterCache();
4422 }
4423
4424 #if INCLUDE_CDS
4425 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4426 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4427 }
4428 #endif
4429 #undef CHARACTER_CACHE_FIELDS_DO
4430
4431 jchar java_lang_Character::value(oop obj) {
4432 jvalue v;
4433 java_lang_boxing_object::get_value(obj, &v);
4434 return v.c;
4435 }
4436
4437 #define SHORT_CACHE_FIELDS_DO(macro) \
4438 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4439
4440 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4441 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4442 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4443 }
4444
4445 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4446 oop base = ik->static_field_base_raw();
4447 return objArrayOop(base->obj_field(_static_cache_offset));
4448 }
4449
4450 Symbol* java_lang_Short_ShortCache::symbol() {
4451 return vmSymbols::java_lang_Short_ShortCache();
4452 }
4453
4454 #if INCLUDE_CDS
4455 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4456 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4457 }
4458 #endif
4459 #undef SHORT_CACHE_FIELDS_DO
4460
4461 jshort java_lang_Short::value(oop obj) {
4462 jvalue v;
4463 java_lang_boxing_object::get_value(obj, &v);
4464 return v.s;
4465 }
4466
4467 #define BYTE_CACHE_FIELDS_DO(macro) \
4468 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4469
4470 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4471 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4472 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4473 }
4474
4475 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4476 oop base = ik->static_field_base_raw();
4477 return objArrayOop(base->obj_field(_static_cache_offset));
4478 }
4479
4480 Symbol* java_lang_Byte_ByteCache::symbol() {
4481 return vmSymbols::java_lang_Byte_ByteCache();
4482 }
4483
4484 #if INCLUDE_CDS
4485 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4486 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4487 }
4488 #endif
4489 #undef BYTE_CACHE_FIELDS_DO
4490
4491 jbyte java_lang_Byte::value(oop obj) {
4492 jvalue v;
4493 java_lang_boxing_object::get_value(obj, &v);
4494 return v.b;
4495 }
4496 #define BOOLEAN_FIELDS_DO(macro) \
4497 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4498 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4499
4500
4501 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4502 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4503 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4504 }
4505
4506 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4507 oop base = ik->static_field_base_raw();
4508 return base->obj_field(_static_TRUE_offset);
4509 }
4510
4511 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4512 oop base = ik->static_field_base_raw();
4513 return base->obj_field(_static_FALSE_offset);
4514 }
4515
4516 Symbol* java_lang_Boolean::symbol() {
4517 return vmSymbols::java_lang_Boolean();
4518 }
4519
4520 #if INCLUDE_CDS
4521 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4522 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4523 }
4524 #endif
4525 #undef BOOLEAN_CACHE_FIELDS_DO
4526
4527 jboolean java_lang_Boolean::value(oop obj) {
4528 jvalue v;
4529 java_lang_boxing_object::get_value(obj, &v);
4530 return v.z;
4531 }
4532
4533 static int member_offset(int hardcoded_offset) {
4534 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4535 }
4536
4537 // Compute hard-coded offsets
4538 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4539 // are not available to determine the offset_of_static_fields.
4540 void JavaClasses::compute_hard_coded_offsets() {
4541
4542 // java_lang_boxing_object
4543 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4544 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4545
4546 // java_lang_ref_Reference
4547 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4548 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4549 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4550 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4551 }
4552
4553 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4554
4555 // Compute non-hard-coded field offsets of all the classes in this file
4556 void JavaClasses::compute_offsets() {
4557 if (UseSharedSpaces) {
4558 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4559 JvmtiExport::has_early_class_hook_env()),
4560 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4561 // None of the classes used by the rest of this function can be replaced by
4562 // JMVTI ClassFileLoadHook.
4563 // We are safe to use the archived offsets, which have already been restored
4564 // by JavaClasses::serialize_offsets, without computing the offsets again.
4565 return;
4566 }
4567
4568 // We have already called the compute_offsets() of the
4569 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4570 // earlier inside SystemDictionary::resolve_well_known_classes()
4571 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4572 }
4573
4574 #if INCLUDE_CDS
4575 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4576
4577 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4578 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4579 }
4580 #endif
4581
4582
4583 #ifndef PRODUCT
4584
4585 // These functions exist to assert the validity of hard-coded field offsets to guard
4586 // against changes in the class files
4587
4588 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4589 EXCEPTION_MARK;
4590 fieldDescriptor fd;
4591 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4592 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4593 InstanceKlass* ik = InstanceKlass::cast(k);
4594 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4595 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4596 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4597 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4598 return false;
4599 }
4600 if (fd.is_static()) {
4601 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4602 return false;
4603 }
4604 if (fd.offset() == hardcoded_offset ) {
4605 return true;
4606 } else {
4607 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4608 klass_name, field_name, hardcoded_offset, fd.offset());
4609 return false;
4610 }
4611 }
4612
4613 // Check the hard-coded field offsets of all the classes in this file
4614
4615 void JavaClasses::check_offsets() {
4616 bool valid = true;
4617
4618 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4619 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4620
4621 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4622 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4623
4624 // Boxed primitive objects (java_lang_boxing_object)
4625
4626 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4627 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4628 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4629 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4630 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4631 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4632 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4633 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4634
4635 // java.lang.ref.Reference
4636
4637 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4638 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4639 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4640 // Fake field
4641 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4642
4643 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4644 }
4645
4646 #endif // PRODUCT
4647
4648 int InjectedField::compute_offset() {
4649 InstanceKlass* ik = InstanceKlass::cast(klass());
4650 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4651 if (!may_be_java && !fs.access_flags().is_internal()) {
4652 // Only look at injected fields
4653 continue;
4654 }
4655 if (fs.name() == name() && fs.signature() == signature()) {
4656 return fs.offset();
4657 }
4658 }
4659 ResourceMark rm;
4660 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)" : "");
4661 #ifndef PRODUCT
4662 ik->print();
4663 tty->print_cr("all fields:");
4664 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4665 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4666 }
4667 #endif //PRODUCT
4668 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4669 return -1;
4670 }
4671
4672 void javaClasses_init() {
4673 JavaClasses::compute_offsets();
4674 JavaClasses::check_offsets();
4675 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4676 }