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 // Register native methods of Object
91 void java_lang_Object::register_natives(TRAPS) {
92 InstanceKlass* obj = SystemDictionary::Object_klass();
93 Method::register_native(obj, vmSymbols::hashCode_name(),
94 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
95 Method::register_native(obj, vmSymbols::wait_name(),
96 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
97 Method::register_native(obj, vmSymbols::notify_name(),
98 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
99 Method::register_native(obj, vmSymbols::notifyAll_name(),
100 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
101 Method::register_native(obj, vmSymbols::clone_name(),
102 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
103 }
104
105 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
106 return _injected_fields[id].compute_offset();
107 }
108
109 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
110 *field_count = 0;
111
112 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
113 if (sid == vmSymbols::NO_SID) {
114 // Only well known classes can inject fields
115 return NULL;
116 }
117
118 int count = 0;
119 int start = -1;
120
121 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
122 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
123 count++; \
124 if (start == -1) start = klass##_##name##_enum; \
125 }
126 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
127 #undef LOOKUP_INJECTED_FIELD
128
129 if (start != -1) {
130 *field_count = count;
131 return _injected_fields + start;
132 }
133 return NULL;
134 }
135
136
137 // Helpful routine for computing field offsets at run time rather than hardcoding them
138 // Finds local fields only, including static fields. Static field offsets are from the
139 // beginning of the mirror.
140 static void compute_offset(int &dest_offset,
141 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
142 bool is_static = false) {
143 fieldDescriptor fd;
144 if (ik == NULL) {
145 ResourceMark rm;
146 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
147 vm_exit_during_initialization("Invalid layout of well-known class");
148 }
149
150 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
151 ResourceMark rm;
152 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
153 name_symbol->as_C_string(), signature_symbol->as_C_string());
154 #ifndef PRODUCT
155 // Prints all fields and offsets
156 Log(class) lt;
157 LogStream ls(lt.error());
158 ik->print_on(&ls);
159 #endif //PRODUCT
160 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
161 }
162 dest_offset = fd.offset();
163 }
164
165 // Overloading to pass name as a string.
166 static void compute_offset(int& dest_offset, InstanceKlass* ik,
167 const char* name_string, Symbol* signature_symbol,
168 bool is_static = false) {
169 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
170 if (name == NULL) {
171 ResourceMark rm;
172 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
173 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
174 }
175 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
176 }
177
178 int java_lang_String::value_offset = 0;
179 int java_lang_String::hash_offset = 0;
180 int java_lang_String::hashIsZero_offset = 0;
181 int java_lang_String::coder_offset = 0;
182
183 bool java_lang_String::initialized = false;
184
185 bool java_lang_String::is_instance(oop obj) {
186 return is_instance_inlined(obj);
187 }
188
189 #if INCLUDE_CDS
190 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
191 f->do_u4((u4*)&offset)
192 #endif
193
194 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
195 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
196
197 #define STRING_FIELDS_DO(macro) \
198 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
199 macro(hash_offset, k, "hash", int_signature, false); \
200 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
201 macro(coder_offset, k, "coder", byte_signature, false);
202
203 void java_lang_String::compute_offsets() {
204 if (initialized) {
205 return;
206 }
207
208 InstanceKlass* k = SystemDictionary::String_klass();
209 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
210
211 initialized = true;
212 }
213
214 #if INCLUDE_CDS
215 void java_lang_String::serialize_offsets(SerializeClosure* f) {
216 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
217 f->do_bool(&initialized);
218 }
219 #endif
220
221 class CompactStringsFixup : public FieldClosure {
222 private:
223 bool _value;
224
225 public:
226 CompactStringsFixup(bool value) : _value(value) {}
227
228 void do_field(fieldDescriptor* fd) {
229 if (fd->name() == vmSymbols::compact_strings_name()) {
230 oop mirror = fd->field_holder()->java_mirror();
231 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
232 assert(mirror != NULL, "String must have mirror already");
233 mirror->bool_field_put(fd->offset(), _value);
234 }
235 }
236 };
237
238 void java_lang_String::set_compact_strings(bool value) {
239 CompactStringsFixup fix(value);
240 SystemDictionary::String_klass()->do_local_static_fields(&fix);
241 }
242
243 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
244 assert(initialized, "Must be initialized");
245 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
246
247 // Create the String object first, so there's a chance that the String
248 // and the char array it points to end up in the same cache line.
249 oop obj;
250 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
251
252 // Create the char array. The String object must be handlized here
253 // because GC can happen as a result of the allocation attempt.
254 Handle h_obj(THREAD, obj);
255 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
256 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
257
258 // Point the String at the char array
259 obj = h_obj();
260 set_value(obj, buffer);
261 // No need to zero the offset, allocation zero'ed the entire String object
262 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
263 return h_obj;
264 }
265
266 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
267 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
268 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
269 typeArrayOop buffer = value(h_obj());
270 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
271 if (is_latin1) {
272 for (int index = 0; index < length; index++) {
273 buffer->byte_at_put(index, (jbyte)unicode[index]);
274 }
275 } else {
276 for (int index = 0; index < length; index++) {
277 buffer->char_at_put(index, unicode[index]);
278 }
279 }
280
281 #ifdef ASSERT
282 {
283 ResourceMark rm;
284 char* expected = UNICODE::as_utf8(unicode, length);
285 char* actual = as_utf8_string(h_obj());
286 if (strcmp(expected, actual) != 0) {
287 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
288 ShouldNotReachHere();
289 }
290 }
291 #endif
292
293 return h_obj;
294 }
295
296 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
297 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
298 return h_obj();
299 }
300
301 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
302 if (utf8_str == NULL) {
303 return Handle();
304 }
305 bool has_multibyte, is_latin1;
306 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
307 if (!CompactStrings) {
308 has_multibyte = true;
309 is_latin1 = false;
310 }
311
312 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
313 if (length > 0) {
314 if (!has_multibyte) {
315 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
316 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
317 } else if (is_latin1) {
318 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
319 } else {
320 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
321 }
322 }
323
324 #ifdef ASSERT
325 // This check is too strict because the input string is not necessarily valid UTF8.
326 // For example, it may be created with arbitrary content via jni_NewStringUTF.
327 /*
328 {
329 ResourceMark rm;
330 const char* expected = utf8_str;
331 char* actual = as_utf8_string(h_obj());
332 if (strcmp(expected, actual) != 0) {
333 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
334 ShouldNotReachHere();
335 }
336 }
337 */
338 #endif
339
340 return h_obj;
341 }
342
343 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
344 Handle h_obj = create_from_str(utf8_str, CHECK_0);
345 return h_obj();
346 }
347
348 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
349 const char* utf8_str = (char*)symbol->bytes();
350 int utf8_len = symbol->utf8_length();
351
352 bool has_multibyte, is_latin1;
353 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
354 if (!CompactStrings) {
355 has_multibyte = true;
356 is_latin1 = false;
357 }
358
359 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
360 if (length > 0) {
361 if (!has_multibyte) {
362 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
363 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
364 } else if (is_latin1) {
365 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
366 } else {
367 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
368 }
369 }
370
371 #ifdef ASSERT
372 {
373 ResourceMark rm;
374 const char* expected = symbol->as_utf8();
375 char* actual = as_utf8_string(h_obj());
376 if (strncmp(expected, actual, utf8_len) != 0) {
377 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
378 ShouldNotReachHere();
379 }
380 }
381 #endif
382
383 return h_obj;
384 }
385
386 // Converts a C string to a Java String based on current encoding
387 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
388 assert(str != NULL, "bad arguments");
389
390 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
391 static to_java_string_fn_t _to_java_string_fn = NULL;
392
393 if (_to_java_string_fn == NULL) {
394 void *lib_handle = os::native_java_library();
395 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
396 if (_to_java_string_fn == NULL) {
397 fatal("NewStringPlatform missing");
398 }
399 }
400
401 jstring js = NULL;
402 {
403 assert(THREAD->is_Java_thread(), "must be java thread");
404 JavaThread* thread = (JavaThread*)THREAD;
405 HandleMark hm(thread);
406 ThreadToNativeFromVM ttn(thread);
407 js = (_to_java_string_fn)(thread->jni_environment(), str);
408 }
409
410 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
411 JNIHandles::destroy_local(js); // destroy local JNIHandle.
412 return native_platform_string;
413 }
414
415 // Converts a Java String to a native C string that can be used for
416 // native OS calls.
417 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
418 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
419 static to_platform_string_fn_t _to_platform_string_fn = NULL;
420
421 if (_to_platform_string_fn == NULL) {
422 void *lib_handle = os::native_java_library();
423 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
424 if (_to_platform_string_fn == NULL) {
425 fatal("GetStringPlatformChars missing");
426 }
427 }
428
429 char *native_platform_string;
430 { JavaThread* thread = (JavaThread*)THREAD;
431 assert(thread->is_Java_thread(), "must be java thread");
432 JNIEnv *env = thread->jni_environment();
433 jstring js = (jstring) JNIHandles::make_local(env, java_string());
434 bool is_copy;
435 HandleMark hm(thread);
436 ThreadToNativeFromVM ttn(thread);
437 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
438 assert(is_copy == JNI_TRUE, "is_copy value changed");
439 JNIHandles::destroy_local(js);
440 }
441 return native_platform_string;
442 }
443
444 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
445 oop obj = java_string();
446 // Typical usage is to convert all '/' to '.' in string.
447 typeArrayOop value = java_lang_String::value(obj);
448 int length = java_lang_String::length(obj, value);
449 bool is_latin1 = java_lang_String::is_latin1(obj);
450
451 // First check if any from_char exist
452 int index; // Declared outside, used later
453 for (index = 0; index < length; index++) {
454 jchar c = !is_latin1 ? value->char_at(index) :
455 ((jchar) value->byte_at(index)) & 0xff;
456 if (c == from_char) {
457 break;
458 }
459 }
460 if (index == length) {
461 // No from_char, so do not copy.
462 return java_string;
463 }
464
465 // Check if result string will be latin1
466 bool to_is_latin1 = false;
467
468 // Replacement char must be latin1
469 if (CompactStrings && UNICODE::is_latin1(to_char)) {
470 if (is_latin1) {
471 // Source string is latin1 as well
472 to_is_latin1 = true;
473 } else if (!UNICODE::is_latin1(from_char)) {
474 // We are replacing an UTF16 char. Scan string to
475 // check if result can be latin1 encoded.
476 to_is_latin1 = true;
477 for (index = 0; index < length; index++) {
478 jchar c = value->char_at(index);
479 if (c != from_char && !UNICODE::is_latin1(c)) {
480 to_is_latin1 = false;
481 break;
482 }
483 }
484 }
485 }
486
487 // Create new UNICODE (or byte) buffer. Must handlize value because GC
488 // may happen during String and char array creation.
489 typeArrayHandle h_value(THREAD, value);
490 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
491 typeArrayOop from_buffer = h_value();
492 typeArrayOop to_buffer = java_lang_String::value(string());
493
494 // Copy contents
495 for (index = 0; index < length; index++) {
496 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
497 ((jchar) from_buffer->byte_at(index)) & 0xff;
498 if (c == from_char) {
499 c = to_char;
500 }
501 if (!to_is_latin1) {
502 to_buffer->char_at_put(index, c);
503 } else {
504 to_buffer->byte_at_put(index, (jbyte) c);
505 }
506 }
507 return string;
508 }
509
510 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
511 typeArrayOop value = java_lang_String::value(java_string);
512 length = java_lang_String::length(java_string, value);
513 bool is_latin1 = java_lang_String::is_latin1(java_string);
514
515 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
516 if (result != NULL) {
517 if (!is_latin1) {
518 for (int index = 0; index < length; index++) {
519 result[index] = value->char_at(index);
520 }
521 } else {
522 for (int index = 0; index < length; index++) {
523 result[index] = ((jchar) value->byte_at(index)) & 0xff;
524 }
525 }
526 } else {
527 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
528 }
529 return result;
530 }
531
532 unsigned int java_lang_String::hash_code(oop java_string) {
533 // The hash and hashIsZero fields are subject to a benign data race,
534 // making it crucial to ensure that any observable result of the
535 // calculation in this method stays correct under any possible read of
536 // these fields. Necessary restrictions to allow this to be correct
537 // without explicit memory fences or similar concurrency primitives is
538 // that we can ever only write to one of these two fields for a given
539 // String instance, and that the computation is idempotent and derived
540 // from immutable state
541 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
542 if (java_lang_String::hash_is_set(java_string)) {
543 return java_string->int_field(hash_offset);
544 }
545
546 typeArrayOop value = java_lang_String::value(java_string);
547 int length = java_lang_String::length(java_string, value);
548 bool is_latin1 = java_lang_String::is_latin1(java_string);
549
550 unsigned int hash = 0;
551 if (length > 0) {
552 if (is_latin1) {
553 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
554 } else {
555 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
556 }
557 }
558
559 if (hash != 0) {
560 java_string->int_field_put(hash_offset, hash);
561 } else {
562 java_string->bool_field_put(hashIsZero_offset, true);
563 }
564 return hash;
565 }
566
567 char* java_lang_String::as_quoted_ascii(oop java_string) {
568 typeArrayOop value = java_lang_String::value(java_string);
569 int length = java_lang_String::length(java_string, value);
570 bool is_latin1 = java_lang_String::is_latin1(java_string);
571
572 if (length == 0) return NULL;
573
574 char* result;
575 int result_length;
576 if (!is_latin1) {
577 jchar* base = value->char_at_addr(0);
578 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
579 result = NEW_RESOURCE_ARRAY(char, result_length);
580 UNICODE::as_quoted_ascii(base, length, result, result_length);
581 } else {
582 jbyte* base = value->byte_at_addr(0);
583 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
584 result = NEW_RESOURCE_ARRAY(char, result_length);
585 UNICODE::as_quoted_ascii(base, length, result, result_length);
586 }
587 assert(result_length >= length + 1, "must not be shorter");
588 assert(result_length == (int)strlen(result) + 1, "must match");
589 return result;
590 }
591
592 Symbol* java_lang_String::as_symbol(oop java_string) {
593 typeArrayOop value = java_lang_String::value(java_string);
594 int length = java_lang_String::length(java_string, value);
595 bool is_latin1 = java_lang_String::is_latin1(java_string);
596 if (!is_latin1) {
597 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
598 Symbol* sym = SymbolTable::new_symbol(base, length);
599 return sym;
600 } else {
601 ResourceMark rm;
602 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
603 const char* base = UNICODE::as_utf8(position, length);
604 Symbol* sym = SymbolTable::new_symbol(base, length);
605 return sym;
606 }
607 }
608
609 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
610 typeArrayOop value = java_lang_String::value(java_string);
611 int length = java_lang_String::length(java_string, value);
612 bool is_latin1 = java_lang_String::is_latin1(java_string);
613 if (!is_latin1) {
614 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
615 return SymbolTable::probe_unicode(base, length);
616 } else {
617 ResourceMark rm;
618 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
619 const char* base = UNICODE::as_utf8(position, length);
620 return SymbolTable::probe(base, length);
621 }
622 }
623
624 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
625 assert(value_equals(value, java_lang_String::value(java_string)),
626 "value must be same as java_lang_String::value(java_string)");
627 int length = java_lang_String::length(java_string, value);
628 if (length == 0) {
629 return 0;
630 }
631 if (!java_lang_String::is_latin1(java_string)) {
632 return UNICODE::utf8_length(value->char_at_addr(0), length);
633 } else {
634 return UNICODE::utf8_length(value->byte_at_addr(0), length);
635 }
636 }
637
638 int java_lang_String::utf8_length(oop java_string) {
639 typeArrayOop value = java_lang_String::value(java_string);
640 return utf8_length(java_string, value);
641 }
642
643 char* java_lang_String::as_utf8_string(oop java_string) {
644 typeArrayOop value = java_lang_String::value(java_string);
645 int length = java_lang_String::length(java_string, value);
646 bool is_latin1 = java_lang_String::is_latin1(java_string);
647 if (!is_latin1) {
648 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
649 return UNICODE::as_utf8(position, length);
650 } else {
651 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
652 return UNICODE::as_utf8(position, length);
653 }
654 }
655
656 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
657 assert(value_equals(value, java_lang_String::value(java_string)),
658 "value must be same as java_lang_String::value(java_string)");
659 int length = java_lang_String::length(java_string, value);
660 bool is_latin1 = java_lang_String::is_latin1(java_string);
661 if (!is_latin1) {
662 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
663 return UNICODE::as_utf8(position, length, buf, buflen);
664 } else {
665 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
666 return UNICODE::as_utf8(position, length, buf, buflen);
667 }
668 }
669
670 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
671 typeArrayOop value = java_lang_String::value(java_string);
672 return as_utf8_string(java_string, value, buf, buflen);
673 }
674
675 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
676 typeArrayOop value = java_lang_String::value(java_string);
677 bool is_latin1 = java_lang_String::is_latin1(java_string);
678 assert(start + len <= java_lang_String::length(java_string), "just checking");
679 if (!is_latin1) {
680 jchar* position = value->char_at_addr(start);
681 return UNICODE::as_utf8(position, len);
682 } else {
683 jbyte* position = value->byte_at_addr(start);
684 return UNICODE::as_utf8(position, len);
685 }
686 }
687
688 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
689 assert(value_equals(value, java_lang_String::value(java_string)),
690 "value must be same as java_lang_String::value(java_string)");
691 assert(start + len <= java_lang_String::length(java_string), "just checking");
692 bool is_latin1 = java_lang_String::is_latin1(java_string);
693 if (!is_latin1) {
694 jchar* position = value->char_at_addr(start);
695 return UNICODE::as_utf8(position, len, buf, buflen);
696 } else {
697 jbyte* position = value->byte_at_addr(start);
698 return UNICODE::as_utf8(position, len, buf, buflen);
699 }
700 }
701
702 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
703 assert(java_string->klass() == SystemDictionary::String_klass(),
704 "must be java_string");
705 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
706 int length = java_lang_String::length(java_string, value);
707 if (length != len) {
708 return false;
709 }
710 bool is_latin1 = java_lang_String::is_latin1(java_string);
711 if (!is_latin1) {
712 for (int i = 0; i < len; i++) {
713 if (value->char_at(i) != chars[i]) {
714 return false;
715 }
716 }
717 } else {
718 for (int i = 0; i < len; i++) {
719 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
720 return false;
721 }
722 }
723 }
724 return true;
725 }
726
727 bool java_lang_String::equals(oop str1, oop str2) {
728 assert(str1->klass() == SystemDictionary::String_klass(),
729 "must be java String");
730 assert(str2->klass() == SystemDictionary::String_klass(),
731 "must be java String");
732 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
733 bool is_latin1 = java_lang_String::is_latin1(str1);
734 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
735 bool is_latin2 = java_lang_String::is_latin1(str2);
736
737 if (is_latin1 != is_latin2) {
738 // Strings with different coders are never equal.
739 return false;
740 }
741 return value_equals(value1, value2);
742 }
743
744 void java_lang_String::print(oop java_string, outputStream* st) {
745 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
746 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
747
748 if (value == NULL) {
749 // This can happen if, e.g., printing a String
750 // object before its initializer has been called
751 st->print("NULL");
752 return;
753 }
754
755 int length = java_lang_String::length(java_string, value);
756 bool is_latin1 = java_lang_String::is_latin1(java_string);
757
758 st->print("\"");
759 for (int index = 0; index < length; index++) {
760 st->print("%c", (!is_latin1) ? value->char_at(index) :
761 ((jchar) value->byte_at(index)) & 0xff );
762 }
763 st->print("\"");
764 }
765
766
767 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
768 assert(mirror.not_null() && fd->is_static(), "just checking");
769 if (fd->has_initial_value()) {
770 BasicType t = fd->field_type();
771 switch (t) {
772 case T_BYTE:
773 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
774 break;
775 case T_BOOLEAN:
776 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
777 break;
778 case T_CHAR:
779 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
780 break;
781 case T_SHORT:
782 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
783 break;
784 case T_INT:
785 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
786 break;
787 case T_FLOAT:
788 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
789 break;
790 case T_DOUBLE:
791 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
792 break;
793 case T_LONG:
794 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
795 break;
796 case T_OBJECT:
797 {
798 assert(fd->signature() == vmSymbols::string_signature(),
799 "just checking");
800 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
801 // Archive the String field and update the pointer.
802 oop s = mirror()->obj_field(fd->offset());
803 oop archived_s = StringTable::create_archived_string(s, CHECK);
804 mirror()->obj_field_put(fd->offset(), archived_s);
805 } else {
806 oop string = fd->string_initial_value(CHECK);
807 mirror()->obj_field_put(fd->offset(), string);
808 }
809 }
810 break;
811 default:
812 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
813 "Illegal ConstantValue attribute in class file");
814 }
815 }
816 }
817
818
819 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
820 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
821
822 // If the offset was read from the shared archive, it was fixed up already
823 if (!k->is_shared()) {
824 if (k->is_instance_klass()) {
825 // During bootstrap, java.lang.Class wasn't loaded so static field
826 // offsets were computed without the size added it. Go back and
827 // update all the static field offsets to included the size.
828 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
829 if (fs.access_flags().is_static()) {
830 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
831 fs.set_offset(real_offset);
832 }
833 }
834 }
835 }
836
837 if (k->is_shared() && k->has_raw_archived_mirror()) {
838 if (HeapShared::open_archive_heap_region_mapped()) {
839 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
840 assert(present, "Missing archived mirror for %s", k->external_name());
841 return;
842 } else {
843 k->set_java_mirror_handle(NULL);
844 k->clear_has_raw_archived_mirror();
845 }
846 }
847 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
848 }
849
850 void java_lang_Class::initialize_mirror_fields(Klass* k,
851 Handle mirror,
852 Handle protection_domain,
853 TRAPS) {
854 // Allocate a simple java object for a lock.
855 // This needs to be a java object because during class initialization
856 // it can be held across a java call.
857 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
858 set_init_lock(mirror(), r);
859
860 // Set protection domain also
861 set_protection_domain(mirror(), protection_domain());
862
863 // Initialize static fields
864 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
865 }
866
867 // Set the java.lang.Module module field in the java_lang_Class mirror
868 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
869 if (module.is_null()) {
870 // During startup, the module may be NULL only if java.base has not been defined yet.
871 // Put the class on the fixup_module_list to patch later when the java.lang.Module
872 // for java.base is known. But note that since we captured the NULL module another
873 // thread may have completed that initialization.
874
875 bool javabase_was_defined = false;
876 {
877 MutexLocker m1(Module_lock, THREAD);
878 // Keep list of classes needing java.base module fixup
879 if (!ModuleEntryTable::javabase_defined()) {
880 assert(k->java_mirror() != NULL, "Class's mirror is null");
881 k->class_loader_data()->inc_keep_alive();
882 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
883 fixup_module_field_list()->push(k);
884 } else {
885 javabase_was_defined = true;
886 }
887 }
888
889 // If java.base was already defined then patch this particular class with java.base.
890 if (javabase_was_defined) {
891 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
892 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
893 "Setting class module field, " JAVA_BASE_NAME " should be defined");
894 Handle javabase_handle(THREAD, javabase_entry->module());
895 set_module(mirror(), javabase_handle());
896 }
897 } else {
898 assert(Universe::is_module_initialized() ||
899 (ModuleEntryTable::javabase_defined() &&
900 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
901 "Incorrect java.lang.Module specification while creating mirror");
902 set_module(mirror(), module());
903 }
904 }
905
906 // Statically allocate fixup lists because they always get created.
907 void java_lang_Class::allocate_fixup_lists() {
908 GrowableArray<Klass*>* mirror_list =
909 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
910 set_fixup_mirror_list(mirror_list);
911
912 GrowableArray<Klass*>* module_list =
913 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
914 set_fixup_module_field_list(module_list);
915 }
916
917 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
918 Handle module, Handle protection_domain, TRAPS) {
919 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
920 assert(k->java_mirror() == NULL, "should only assign mirror once");
921
922 // Use this moment of initialization to cache modifier_flags also,
923 // to support Class.getModifiers(). Instance classes recalculate
924 // the cached flags after the class file is parsed, but before the
925 // class is put into the system dictionary.
926 int computed_modifiers = k->compute_modifier_flags(CHECK);
927 k->set_modifier_flags(computed_modifiers);
928 // Class_klass has to be loaded because it is used to allocate
929 // the mirror.
930 if (SystemDictionary::Class_klass_loaded()) {
931 // Allocate mirror (java.lang.Class instance)
932 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
933 Handle mirror(THREAD, mirror_oop);
934 Handle comp_mirror;
935
936 // Setup indirection from mirror->klass
937 java_lang_Class::set_klass(mirror(), k);
938
939 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
940 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
941
942 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
943
944 // It might also have a component mirror. This mirror must already exist.
945 if (k->is_array_klass()) {
946 if (k->is_typeArray_klass()) {
947 BasicType type = TypeArrayKlass::cast(k)->element_type();
948 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
949 } else {
950 assert(k->is_objArray_klass(), "Must be");
951 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
952 assert(element_klass != NULL, "Must have an element klass");
953 comp_mirror = Handle(THREAD, element_klass->java_mirror());
954 }
955 assert(comp_mirror() != NULL, "must have a mirror");
956
957 // Two-way link between the array klass and its component mirror:
958 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
959 set_component_mirror(mirror(), comp_mirror());
960 // See below for ordering dependencies between field array_klass in component mirror
961 // and java_mirror in this klass.
962 } else {
963 assert(k->is_instance_klass(), "Must be");
964
965 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
966 if (HAS_PENDING_EXCEPTION) {
967 // If any of the fields throws an exception like OOM remove the klass field
968 // from the mirror so GC doesn't follow it after the klass has been deallocated.
969 // This mirror looks like a primitive type, which logically it is because it
970 // it represents no class.
971 java_lang_Class::set_klass(mirror(), NULL);
972 return;
973 }
974 }
975
976 // set the classLoader field in the java_lang_Class instance
977 assert(class_loader() == k->class_loader(), "should be same");
978 set_class_loader(mirror(), class_loader());
979
980 // Setup indirection from klass->mirror
981 // after any exceptions can happen during allocations.
982 k->set_java_mirror(mirror);
983
984 // Set the module field in the java_lang_Class instance. This must be done
985 // after the mirror is set.
986 set_mirror_module_field(k, mirror, module, THREAD);
987
988 if (comp_mirror() != NULL) {
989 // Set after k->java_mirror() is published, because compiled code running
990 // concurrently doesn't expect a k to have a null java_mirror.
991 release_set_array_klass(comp_mirror(), k);
992 }
993 } else {
994 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
995 fixup_mirror_list()->push(k);
996 }
997 }
998
999 #if INCLUDE_CDS_JAVA_HEAP
1000 // Clears mirror fields. Static final fields with initial values are reloaded
1001 // from constant pool. The object identity hash is in the object header and is
1002 // not affected.
1003 class ResetMirrorField: public FieldClosure {
1004 private:
1005 Handle _m;
1006
1007 public:
1008 ResetMirrorField(Handle mirror) : _m(mirror) {}
1009
1010 void do_field(fieldDescriptor* fd) {
1011 assert(DumpSharedSpaces, "dump time only");
1012 assert(_m.not_null(), "Mirror cannot be NULL");
1013
1014 if (fd->is_static() && fd->has_initial_value()) {
1015 initialize_static_field(fd, _m, Thread::current());
1016 return;
1017 }
1018
1019 BasicType ft = fd->field_type();
1020 switch (ft) {
1021 case T_BYTE:
1022 _m()->byte_field_put(fd->offset(), 0);
1023 break;
1024 case T_CHAR:
1025 _m()->char_field_put(fd->offset(), 0);
1026 break;
1027 case T_DOUBLE:
1028 _m()->double_field_put(fd->offset(), 0);
1029 break;
1030 case T_FLOAT:
1031 _m()->float_field_put(fd->offset(), 0);
1032 break;
1033 case T_INT:
1034 _m()->int_field_put(fd->offset(), 0);
1035 break;
1036 case T_LONG:
1037 _m()->long_field_put(fd->offset(), 0);
1038 break;
1039 case T_SHORT:
1040 _m()->short_field_put(fd->offset(), 0);
1041 break;
1042 case T_BOOLEAN:
1043 _m()->bool_field_put(fd->offset(), false);
1044 break;
1045 case T_ARRAY:
1046 case T_OBJECT: {
1047 // It might be useful to cache the String field, but
1048 // for now just clear out any reference field
1049 oop o = _m()->obj_field(fd->offset());
1050 _m()->obj_field_put(fd->offset(), NULL);
1051 break;
1052 }
1053 default:
1054 ShouldNotReachHere();
1055 break;
1056 }
1057 }
1058 };
1059
1060 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1061 assert(HeapShared::is_heap_object_archiving_allowed(),
1062 "HeapShared::is_heap_object_archiving_allowed() must be true");
1063
1064 for (int t = 0; t <= T_VOID; t++) {
1065 oop m = Universe::_mirrors[t];
1066 if (m != NULL) {
1067 // Update the field at _array_klass_offset to point to the relocated array klass.
1068 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1069 assert(archived_m != NULL, "sanity");
1070 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1071 assert(ak != NULL || t == T_VOID, "should not be NULL");
1072 if (ak != NULL) {
1073 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1074 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1075 }
1076
1077 // Clear the fields. Just to be safe
1078 Klass *k = m->klass();
1079 Handle archived_mirror_h(THREAD, archived_m);
1080 ResetMirrorField reset(archived_mirror_h);
1081 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1082
1083 log_trace(cds, heap, mirror)(
1084 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1085 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1086
1087 Universe::_mirrors[t] = archived_m;
1088 }
1089 }
1090
1091 assert(Universe::_mirrors[T_INT] != NULL &&
1092 Universe::_mirrors[T_FLOAT] != NULL &&
1093 Universe::_mirrors[T_DOUBLE] != NULL &&
1094 Universe::_mirrors[T_BYTE] != NULL &&
1095 Universe::_mirrors[T_BOOLEAN] != NULL &&
1096 Universe::_mirrors[T_CHAR] != NULL &&
1097 Universe::_mirrors[T_LONG] != NULL &&
1098 Universe::_mirrors[T_SHORT] != NULL &&
1099 Universe::_mirrors[T_VOID] != NULL, "sanity");
1100
1101 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1102 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1103 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1104 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1105 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1106 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1107 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1108 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1109 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1110 }
1111
1112 //
1113 // After the mirror object is successfully archived, the archived
1114 // klass is set with _has_archived_raw_mirror flag.
1115 //
1116 // The _has_archived_raw_mirror flag is cleared at runtime when the
1117 // archived mirror is restored. If archived java heap data cannot
1118 // be used at runtime, new mirror object is created for the shared
1119 // class. The _has_archived_raw_mirror is cleared also during the process.
1120 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1121 assert(HeapShared::is_heap_object_archiving_allowed(),
1122 "HeapShared::is_heap_object_archiving_allowed() must be true");
1123
1124 // Mirror is already archived
1125 if (k->has_raw_archived_mirror()) {
1126 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1127 return k->archived_java_mirror_raw();
1128 }
1129
1130 // No mirror
1131 oop mirror = k->java_mirror();
1132 if (mirror == NULL) {
1133 return NULL;
1134 }
1135
1136 if (k->is_instance_klass()) {
1137 InstanceKlass *ik = InstanceKlass::cast(k);
1138 assert(ik->signers() == NULL, "class with signer should have been excluded");
1139
1140 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1141 ik->is_shared_app_class())) {
1142 // Archiving mirror for classes from non-builtin loaders is not
1143 // supported. Clear the _java_mirror within the archived class.
1144 k->set_java_mirror_handle(NULL);
1145 return NULL;
1146 }
1147 }
1148
1149 // Now start archiving the mirror object
1150 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1151 if (archived_mirror == NULL) {
1152 return NULL;
1153 }
1154
1155 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1156 if (archived_mirror == NULL) {
1157 return NULL;
1158 }
1159
1160 k->set_archived_java_mirror_raw(archived_mirror);
1161
1162 k->set_has_raw_archived_mirror();
1163
1164 ResourceMark rm;
1165 log_trace(cds, heap, mirror)(
1166 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1167 k->external_name(), p2i(mirror), p2i(archived_mirror));
1168
1169 return archived_mirror;
1170 }
1171
1172 // The process is based on create_mirror().
1173 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1174 oop archived_mirror,
1175 Thread *THREAD) {
1176 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1177 // to archived metadata and objects below.
1178 Klass *c = archived_mirror->klass();
1179 Handle archived_mirror_h(THREAD, archived_mirror);
1180 ResetMirrorField reset(archived_mirror_h);
1181 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1182
1183 if (k->is_array_klass()) {
1184 oop archived_comp_mirror;
1185 if (k->is_typeArray_klass()) {
1186 // The primitive type mirrors are already archived. Get the archived mirror.
1187 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1188 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1189 assert(archived_comp_mirror != NULL, "Must be");
1190 } else {
1191 assert(k->is_objArray_klass(), "Must be");
1192 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1193 assert(element_klass != NULL, "Must have an element klass");
1194 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1195 if (archived_comp_mirror == NULL) {
1196 return NULL;
1197 }
1198 }
1199 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1200 } else {
1201 assert(k->is_instance_klass(), "Must be");
1202
1203 // Reset local static fields in the mirror
1204 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1205
1206 java_lang_Class:set_init_lock(archived_mirror, NULL);
1207
1208 set_protection_domain(archived_mirror, NULL);
1209 }
1210
1211 // clear class loader and mirror_module_field
1212 set_class_loader(archived_mirror, NULL);
1213 set_module(archived_mirror, NULL);
1214
1215 // The archived mirror's field at _klass_offset is still pointing to the original
1216 // klass. Updated the field in the archived mirror to point to the relocated
1217 // klass in the archive.
1218 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1219 log_debug(cds, heap, mirror)(
1220 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1221 p2i(as_Klass(mirror)), p2i(reloc_k));
1222 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1223
1224 // The field at _array_klass_offset is pointing to the original one dimension
1225 // higher array klass if exists. Relocate the pointer.
1226 Klass *arr = array_klass_acquire(mirror);
1227 if (arr != NULL) {
1228 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1229 log_debug(cds, heap, mirror)(
1230 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1231 p2i(arr), p2i(reloc_arr));
1232 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1233 }
1234 return archived_mirror;
1235 }
1236
1237 // Returns true if the mirror is updated, false if no archived mirror
1238 // data is present. After the archived mirror object is restored, the
1239 // shared klass' _has_raw_archived_mirror flag is cleared.
1240 bool java_lang_Class::restore_archived_mirror(Klass *k,
1241 Handle class_loader, Handle module,
1242 Handle protection_domain, TRAPS) {
1243 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1244 // see more details in SystemDictionary::resolve_well_known_classes().
1245 if (!SystemDictionary::Class_klass_loaded()) {
1246 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1247 fixup_mirror_list()->push(k);
1248 return true;
1249 }
1250
1251 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1252
1253 if (m == NULL) {
1254 return false;
1255 }
1256
1257 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1258
1259 // mirror is archived, restore
1260 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1261 Handle mirror(THREAD, m);
1262
1263 if (!k->is_array_klass()) {
1264 // - local static final fields with initial values were initialized at dump time
1265
1266 // create the init_lock
1267 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1268 set_init_lock(mirror(), r);
1269
1270 if (protection_domain.not_null()) {
1271 set_protection_domain(mirror(), protection_domain());
1272 }
1273 }
1274
1275 assert(class_loader() == k->class_loader(), "should be same");
1276 if (class_loader.not_null()) {
1277 set_class_loader(mirror(), class_loader());
1278 }
1279
1280 k->set_java_mirror(mirror);
1281 k->clear_has_raw_archived_mirror();
1282
1283 set_mirror_module_field(k, mirror, module, THREAD);
1284
1285 ResourceMark rm;
1286 log_trace(cds, heap, mirror)(
1287 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1288
1289 return true;
1290 }
1291 #endif // INCLUDE_CDS_JAVA_HEAP
1292
1293 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1294 assert(_module_offset != 0, "must have been computed already");
1295 java_lang_Class::set_module(k->java_mirror(), module());
1296 }
1297
1298 int java_lang_Class::oop_size(oop java_class) {
1299 assert(_oop_size_offset != 0, "must be set");
1300 int size = java_class->int_field(_oop_size_offset);
1301 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1302 return size;
1303 }
1304
1305
1306 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1307 assert(_oop_size_offset != 0, "must be set");
1308 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1309 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1310 }
1311
1312 int java_lang_Class::static_oop_field_count(oop java_class) {
1313 assert(_static_oop_field_count_offset != 0, "must be set");
1314 return java_class->int_field(_static_oop_field_count_offset);
1315 }
1316
1317 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1318 assert(_static_oop_field_count_offset != 0, "must be set");
1319 return java_class->int_field_raw(_static_oop_field_count_offset);
1320 }
1321
1322 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1323 assert(_static_oop_field_count_offset != 0, "must be set");
1324 java_class->int_field_put(_static_oop_field_count_offset, size);
1325 }
1326
1327 oop java_lang_Class::protection_domain(oop java_class) {
1328 assert(_protection_domain_offset != 0, "must be set");
1329 return java_class->obj_field(_protection_domain_offset);
1330 }
1331 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1332 assert(_protection_domain_offset != 0, "must be set");
1333 java_class->obj_field_put(_protection_domain_offset, pd);
1334 }
1335
1336 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1337 assert(_component_mirror_offset != 0, "must be set");
1338 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1339 }
1340 oop java_lang_Class::component_mirror(oop java_class) {
1341 assert(_component_mirror_offset != 0, "must be set");
1342 return java_class->obj_field(_component_mirror_offset);
1343 }
1344
1345 oop java_lang_Class::init_lock(oop java_class) {
1346 assert(_init_lock_offset != 0, "must be set");
1347 return java_class->obj_field(_init_lock_offset);
1348 }
1349 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1350 assert(_init_lock_offset != 0, "must be set");
1351 java_class->obj_field_put(_init_lock_offset, init_lock);
1352 }
1353
1354 objArrayOop java_lang_Class::signers(oop java_class) {
1355 assert(_signers_offset != 0, "must be set");
1356 return (objArrayOop)java_class->obj_field(_signers_offset);
1357 }
1358 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1359 assert(_signers_offset != 0, "must be set");
1360 java_class->obj_field_put(_signers_offset, (oop)signers);
1361 }
1362
1363
1364 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1365 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1366 if (_class_loader_offset != 0) {
1367 java_class->obj_field_put(_class_loader_offset, loader);
1368 }
1369 }
1370
1371 oop java_lang_Class::class_loader(oop java_class) {
1372 assert(_class_loader_offset != 0, "must be set");
1373 return java_class->obj_field(_class_loader_offset);
1374 }
1375
1376 oop java_lang_Class::module(oop java_class) {
1377 assert(_module_offset != 0, "must be set");
1378 return java_class->obj_field(_module_offset);
1379 }
1380
1381 void java_lang_Class::set_module(oop java_class, oop module) {
1382 assert(_module_offset != 0, "must be set");
1383 java_class->obj_field_put(_module_offset, module);
1384 }
1385
1386 oop java_lang_Class::name(Handle java_class, TRAPS) {
1387 assert(_name_offset != 0, "must be set");
1388 oop o = java_class->obj_field(_name_offset);
1389 if (o == NULL) {
1390 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1391 java_class->obj_field_put(_name_offset, o);
1392 }
1393 return o;
1394 }
1395
1396 oop java_lang_Class::source_file(oop java_class) {
1397 assert(_source_file_offset != 0, "must be set");
1398 return java_class->obj_field(_source_file_offset);
1399 }
1400
1401 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1402 assert(_source_file_offset != 0, "must be set");
1403 java_class->obj_field_put(_source_file_offset, source_file);
1404 }
1405
1406 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1407 // This should be improved by adding a field at the Java level or by
1408 // introducing a new VM klass (see comment in ClassFileParser)
1409 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1410 if (type != T_VOID) {
1411 Klass* aklass = Universe::typeArrayKlassObj(type);
1412 assert(aklass != NULL, "correct bootstrap");
1413 release_set_array_klass(java_class, aklass);
1414 }
1415 #ifdef ASSERT
1416 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1417 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1418 #endif
1419 return java_class;
1420 }
1421
1422
1423 Klass* java_lang_Class::as_Klass(oop java_class) {
1424 //%note memory_2
1425 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1426 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1427 assert(k == NULL || k->is_klass(), "type check");
1428 return k;
1429 }
1430
1431 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1432 //%note memory_2
1433 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1434 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1435 assert(k == NULL || k->is_klass(), "type check");
1436 return k;
1437 }
1438
1439
1440 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1441 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1442 java_class->metadata_field_put(_klass_offset, klass);
1443 }
1444
1445
1446 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1447 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1448 Symbol* name = NULL;
1449 bool is_instance = false;
1450 if (is_primitive(java_class)) {
1451 name = vmSymbols::type_signature(primitive_type(java_class));
1452 } else {
1453 Klass* k = as_Klass(java_class);
1454 is_instance = k->is_instance_klass();
1455 name = k->name();
1456 }
1457 if (name == NULL) {
1458 st->print("<null>");
1459 return;
1460 }
1461 if (is_instance) st->print("L");
1462 st->write((char*) name->base(), (int) name->utf8_length());
1463 if (is_instance) st->print(";");
1464 }
1465
1466 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1467 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1468 Symbol* name;
1469 if (is_primitive(java_class)) {
1470 name = vmSymbols::type_signature(primitive_type(java_class));
1471 // Because this can create a new symbol, the caller has to decrement
1472 // the refcount, so make adjustment here and below for symbols returned
1473 // that are not created or incremented due to a successful lookup.
1474 name->increment_refcount();
1475 } else {
1476 Klass* k = as_Klass(java_class);
1477 if (!k->is_instance_klass()) {
1478 name = k->name();
1479 name->increment_refcount();
1480 } else {
1481 ResourceMark rm;
1482 const char* sigstr = k->signature_name();
1483 int siglen = (int) strlen(sigstr);
1484 if (!intern_if_not_found) {
1485 name = SymbolTable::probe(sigstr, siglen);
1486 } else {
1487 name = SymbolTable::new_symbol(sigstr, siglen);
1488 }
1489 }
1490 }
1491 return name;
1492 }
1493
1494 // Returns the Java name for this Java mirror (Resource allocated)
1495 // See Klass::external_name().
1496 // For primitive type Java mirrors, its type name is returned.
1497 const char* java_lang_Class::as_external_name(oop java_class) {
1498 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1499 const char* name = NULL;
1500 if (is_primitive(java_class)) {
1501 name = type2name(primitive_type(java_class));
1502 } else {
1503 name = as_Klass(java_class)->external_name();
1504 }
1505 if (name == NULL) {
1506 name = "<null>";
1507 }
1508 return name;
1509 }
1510
1511 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1512 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1513 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1514 return k;
1515 }
1516
1517
1518 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1519 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1520 java_class->release_metadata_field_put(_array_klass_offset, klass);
1521 }
1522
1523
1524 BasicType java_lang_Class::primitive_type(oop java_class) {
1525 assert(java_lang_Class::is_primitive(java_class), "just checking");
1526 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1527 BasicType type = T_VOID;
1528 if (ak != NULL) {
1529 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1530 type = ArrayKlass::cast(ak)->element_type();
1531 } else {
1532 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1533 }
1534 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1535 return type;
1536 }
1537
1538 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1539 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1540 if (is_primitive(java_class)) {
1541 if (reference_klass != NULL)
1542 (*reference_klass) = NULL;
1543 return primitive_type(java_class);
1544 } else {
1545 if (reference_klass != NULL)
1546 (*reference_klass) = as_Klass(java_class);
1547 return T_OBJECT;
1548 }
1549 }
1550
1551
1552 oop java_lang_Class::primitive_mirror(BasicType t) {
1553 oop mirror = Universe::java_mirror(t);
1554 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1555 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1556 return mirror;
1557 }
1558
1559 bool java_lang_Class::offsets_computed = false;
1560 int java_lang_Class::classRedefinedCount_offset = -1;
1561
1562 #define CLASS_FIELDS_DO(macro) \
1563 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1564 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1565 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1566 macro(_module_offset, k, "module", module_signature, false); \
1567 macro(_name_offset, k, "name", string_signature, false); \
1568
1569 void java_lang_Class::compute_offsets() {
1570 if (offsets_computed) {
1571 return;
1572 }
1573
1574 offsets_computed = true;
1575
1576 InstanceKlass* k = SystemDictionary::Class_klass();
1577 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1578
1579 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1580 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1581 // GC treats them the same.
1582 _init_lock_offset = _component_mirror_offset;
1583
1584 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1585 }
1586
1587 #if INCLUDE_CDS
1588 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1589 f->do_bool(&offsets_computed);
1590 f->do_u4((u4*)&_init_lock_offset);
1591
1592 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1593
1594 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1595 }
1596 #endif
1597
1598 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1599 if (classRedefinedCount_offset == -1) {
1600 // If we don't have an offset for it then just return -1 as a marker.
1601 return -1;
1602 }
1603
1604 return the_class_mirror->int_field(classRedefinedCount_offset);
1605 }
1606
1607 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1608 if (classRedefinedCount_offset == -1) {
1609 // If we don't have an offset for it then nothing to set.
1610 return;
1611 }
1612
1613 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1614 }
1615
1616
1617 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1618 // platform thread structure, and a eetop offset which was used for thread
1619 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1620 // merged, so in the HotSpot VM we just use the eetop field for the thread
1621 // instead of the privateInfo_offset.
1622 //
1623 // Note: The stackSize field is only present starting in 1.4.
1624
1625 int java_lang_Thread::_name_offset = 0;
1626 int java_lang_Thread::_group_offset = 0;
1627 int java_lang_Thread::_contextClassLoader_offset = 0;
1628 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1629 int java_lang_Thread::_priority_offset = 0;
1630 int java_lang_Thread::_eetop_offset = 0;
1631 int java_lang_Thread::_daemon_offset = 0;
1632 int java_lang_Thread::_stillborn_offset = 0;
1633 int java_lang_Thread::_stackSize_offset = 0;
1634 int java_lang_Thread::_tid_offset = 0;
1635 int java_lang_Thread::_thread_status_offset = 0;
1636 int java_lang_Thread::_park_blocker_offset = 0;
1637
1638 #define THREAD_FIELDS_DO(macro) \
1639 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1640 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1641 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1642 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1643 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1644 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1645 macro(_eetop_offset, k, "eetop", long_signature, false); \
1646 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1647 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1648 macro(_tid_offset, k, "tid", long_signature, false); \
1649 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1650 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1651
1652 void java_lang_Thread::compute_offsets() {
1653 assert(_group_offset == 0, "offsets should be initialized only once");
1654
1655 InstanceKlass* k = SystemDictionary::Thread_klass();
1656 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1657 }
1658
1659 #if INCLUDE_CDS
1660 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1661 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1662 }
1663 #endif
1664
1665 JavaThread* java_lang_Thread::thread(oop java_thread) {
1666 return (JavaThread*)java_thread->address_field(_eetop_offset);
1667 }
1668
1669
1670 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1671 java_thread->address_field_put(_eetop_offset, (address)thread);
1672 }
1673
1674
1675 oop java_lang_Thread::name(oop java_thread) {
1676 return java_thread->obj_field(_name_offset);
1677 }
1678
1679
1680 void java_lang_Thread::set_name(oop java_thread, oop name) {
1681 java_thread->obj_field_put(_name_offset, name);
1682 }
1683
1684
1685 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1686 return (ThreadPriority)java_thread->int_field(_priority_offset);
1687 }
1688
1689
1690 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1691 java_thread->int_field_put(_priority_offset, priority);
1692 }
1693
1694
1695 oop java_lang_Thread::threadGroup(oop java_thread) {
1696 return java_thread->obj_field(_group_offset);
1697 }
1698
1699
1700 bool java_lang_Thread::is_stillborn(oop java_thread) {
1701 return java_thread->bool_field(_stillborn_offset) != 0;
1702 }
1703
1704
1705 // We never have reason to turn the stillborn bit off
1706 void java_lang_Thread::set_stillborn(oop java_thread) {
1707 java_thread->bool_field_put(_stillborn_offset, true);
1708 }
1709
1710
1711 bool java_lang_Thread::is_alive(oop java_thread) {
1712 JavaThread* thr = java_lang_Thread::thread(java_thread);
1713 return (thr != NULL);
1714 }
1715
1716
1717 bool java_lang_Thread::is_daemon(oop java_thread) {
1718 return java_thread->bool_field(_daemon_offset) != 0;
1719 }
1720
1721
1722 void java_lang_Thread::set_daemon(oop java_thread) {
1723 java_thread->bool_field_put(_daemon_offset, true);
1724 }
1725
1726 oop java_lang_Thread::context_class_loader(oop java_thread) {
1727 return java_thread->obj_field(_contextClassLoader_offset);
1728 }
1729
1730 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1731 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1732 }
1733
1734
1735 jlong java_lang_Thread::stackSize(oop java_thread) {
1736 return java_thread->long_field(_stackSize_offset);
1737 }
1738
1739 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1740 void java_lang_Thread::set_thread_status(oop java_thread,
1741 java_lang_Thread::ThreadStatus status) {
1742 java_thread->int_field_put(_thread_status_offset, status);
1743 }
1744
1745 // Read thread status value from threadStatus field in java.lang.Thread java class.
1746 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1747 // Make sure the caller is operating on behalf of the VM or is
1748 // running VM code (state == _thread_in_vm).
1749 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1750 JavaThread::current()->thread_state() == _thread_in_vm,
1751 "Java Thread is not running in vm");
1752 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1753 }
1754
1755
1756 jlong java_lang_Thread::thread_id(oop java_thread) {
1757 return java_thread->long_field(_tid_offset);
1758 }
1759
1760 oop java_lang_Thread::park_blocker(oop java_thread) {
1761 return java_thread->obj_field(_park_blocker_offset);
1762 }
1763
1764 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1765 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1766 switch (status) {
1767 case NEW : return "NEW";
1768 case RUNNABLE : return "RUNNABLE";
1769 case SLEEPING : return "TIMED_WAITING (sleeping)";
1770 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1771 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1772 case PARKED : return "WAITING (parking)";
1773 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1774 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1775 case TERMINATED : return "TERMINATED";
1776 default : return "UNKNOWN";
1777 };
1778 }
1779 int java_lang_ThreadGroup::_parent_offset = 0;
1780 int java_lang_ThreadGroup::_name_offset = 0;
1781 int java_lang_ThreadGroup::_threads_offset = 0;
1782 int java_lang_ThreadGroup::_groups_offset = 0;
1783 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1784 int java_lang_ThreadGroup::_destroyed_offset = 0;
1785 int java_lang_ThreadGroup::_daemon_offset = 0;
1786 int java_lang_ThreadGroup::_nthreads_offset = 0;
1787 int java_lang_ThreadGroup::_ngroups_offset = 0;
1788
1789 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1790 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1791 return java_thread_group->obj_field(_parent_offset);
1792 }
1793
1794 // ("name as oop" accessor is not necessary)
1795
1796 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1797 oop name = java_thread_group->obj_field(_name_offset);
1798 // ThreadGroup.name can be null
1799 if (name != NULL) {
1800 return java_lang_String::as_utf8_string(name);
1801 }
1802 return NULL;
1803 }
1804
1805 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1806 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1807 return java_thread_group->int_field(_nthreads_offset);
1808 }
1809
1810 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1811 oop threads = java_thread_group->obj_field(_threads_offset);
1812 assert(threads != NULL, "threadgroups should have threads");
1813 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1814 return objArrayOop(threads);
1815 }
1816
1817 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1818 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1819 return java_thread_group->int_field(_ngroups_offset);
1820 }
1821
1822 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1823 oop groups = java_thread_group->obj_field(_groups_offset);
1824 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1825 return objArrayOop(groups);
1826 }
1827
1828 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1829 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1830 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1831 }
1832
1833 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1834 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1835 return java_thread_group->bool_field(_destroyed_offset) != 0;
1836 }
1837
1838 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1839 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1840 return java_thread_group->bool_field(_daemon_offset) != 0;
1841 }
1842
1843 #define THREADGROUP_FIELDS_DO(macro) \
1844 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1845 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1846 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1847 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1848 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1849 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1850 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1851 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1852 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1853
1854 void java_lang_ThreadGroup::compute_offsets() {
1855 assert(_parent_offset == 0, "offsets should be initialized only once");
1856
1857 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1858 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1859 }
1860
1861 #if INCLUDE_CDS
1862 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1863 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1864 }
1865 #endif
1866
1867 #define THROWABLE_FIELDS_DO(macro) \
1868 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1869 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1870 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1871 macro(depth_offset, k, "depth", int_signature, false); \
1872 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1873
1874 void java_lang_Throwable::compute_offsets() {
1875 InstanceKlass* k = SystemDictionary::Throwable_klass();
1876 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1877 }
1878
1879 #if INCLUDE_CDS
1880 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1881 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1882 }
1883 #endif
1884
1885 oop java_lang_Throwable::unassigned_stacktrace() {
1886 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1887 oop base = ik->static_field_base_raw();
1888 return base->obj_field(static_unassigned_stacktrace_offset);
1889 }
1890
1891 oop java_lang_Throwable::backtrace(oop throwable) {
1892 return throwable->obj_field_acquire(backtrace_offset);
1893 }
1894
1895
1896 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1897 throwable->release_obj_field_put(backtrace_offset, value);
1898 }
1899
1900 int java_lang_Throwable::depth(oop throwable) {
1901 return throwable->int_field(depth_offset);
1902 }
1903
1904 void java_lang_Throwable::set_depth(oop throwable, int value) {
1905 throwable->int_field_put(depth_offset, value);
1906 }
1907
1908 oop java_lang_Throwable::message(oop throwable) {
1909 return throwable->obj_field(detailMessage_offset);
1910 }
1911
1912
1913 // Return Symbol for detailed_message or NULL
1914 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1915 PRESERVE_EXCEPTION_MARK; // Keep original exception
1916 oop detailed_message = java_lang_Throwable::message(throwable);
1917 if (detailed_message != NULL) {
1918 return java_lang_String::as_symbol(detailed_message);
1919 }
1920 return NULL;
1921 }
1922
1923 void java_lang_Throwable::set_message(oop throwable, oop value) {
1924 throwable->obj_field_put(detailMessage_offset, value);
1925 }
1926
1927
1928 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1929 throwable->obj_field_put(stackTrace_offset, st_element_array);
1930 }
1931
1932 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1933 set_stacktrace(throwable, NULL);
1934 }
1935
1936
1937 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1938 ResourceMark rm;
1939 Klass* k = throwable->klass();
1940 assert(k != NULL, "just checking");
1941 st->print("%s", k->external_name());
1942 oop msg = message(throwable);
1943 if (msg != NULL) {
1944 st->print(": %s", java_lang_String::as_utf8_string(msg));
1945 }
1946 }
1947
1948 // After this many redefines, the stack trace is unreliable.
1949 const int MAX_VERSION = USHRT_MAX;
1950
1951 static inline bool version_matches(Method* method, int version) {
1952 assert(version < MAX_VERSION, "version is too big");
1953 return method != NULL && (method->constants()->version() == version);
1954 }
1955
1956 // This class provides a simple wrapper over the internal structure of
1957 // exception backtrace to insulate users of the backtrace from needing
1958 // to know what it looks like.
1959 class BacktraceBuilder: public StackObj {
1960 friend class BacktraceIterator;
1961 private:
1962 Handle _backtrace;
1963 objArrayOop _head;
1964 typeArrayOop _methods;
1965 typeArrayOop _bcis;
1966 objArrayOop _mirrors;
1967 typeArrayOop _names; // Needed to insulate method name against redefinition.
1968 // This is set to a java.lang.Boolean(true) if the top frame
1969 // of the backtrace is omitted because it shall be hidden.
1970 // Else it is null.
1971 oop _has_hidden_top_frame;
1972 int _index;
1973 NoSafepointVerifier _nsv;
1974
1975 enum {
1976 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1977 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1978 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1979 trace_names_offset = java_lang_Throwable::trace_names_offset,
1980 trace_next_offset = java_lang_Throwable::trace_next_offset,
1981 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
1982 trace_size = java_lang_Throwable::trace_size,
1983 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1984 };
1985
1986 // get info out of chunks
1987 static typeArrayOop get_methods(objArrayHandle chunk) {
1988 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1989 assert(methods != NULL, "method array should be initialized in backtrace");
1990 return methods;
1991 }
1992 static typeArrayOop get_bcis(objArrayHandle chunk) {
1993 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1994 assert(bcis != NULL, "bci array should be initialized in backtrace");
1995 return bcis;
1996 }
1997 static objArrayOop get_mirrors(objArrayHandle chunk) {
1998 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1999 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2000 return mirrors;
2001 }
2002 static typeArrayOop get_names(objArrayHandle chunk) {
2003 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2004 assert(names != NULL, "names array should be initialized in backtrace");
2005 return names;
2006 }
2007 static oop get_has_hidden_top_frame(objArrayHandle chunk) {
2008 oop hidden = chunk->obj_at(trace_hidden_offset);
2009 return hidden;
2010 }
2011
2012 public:
2013
2014 // constructor for new backtrace
2015 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) {
2016 expand(CHECK);
2017 _backtrace = Handle(THREAD, _head);
2018 _index = 0;
2019 }
2020
2021 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2022 _methods = get_methods(backtrace);
2023 _bcis = get_bcis(backtrace);
2024 _mirrors = get_mirrors(backtrace);
2025 _names = get_names(backtrace);
2026 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace);
2027 assert(_methods->length() == _bcis->length() &&
2028 _methods->length() == _mirrors->length() &&
2029 _mirrors->length() == _names->length(),
2030 "method and source information arrays should match");
2031
2032 // head is the preallocated backtrace
2033 _head = backtrace();
2034 _backtrace = Handle(thread, _head);
2035 _index = 0;
2036 }
2037
2038 void expand(TRAPS) {
2039 objArrayHandle old_head(THREAD, _head);
2040 PauseNoSafepointVerifier pnsv(&_nsv);
2041
2042 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2043 objArrayHandle new_head(THREAD, head);
2044
2045 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2046 typeArrayHandle new_methods(THREAD, methods);
2047
2048 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2049 typeArrayHandle new_bcis(THREAD, bcis);
2050
2051 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2052 objArrayHandle new_mirrors(THREAD, mirrors);
2053
2054 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2055 typeArrayHandle new_names(THREAD, names);
2056
2057 if (!old_head.is_null()) {
2058 old_head->obj_at_put(trace_next_offset, new_head());
2059 }
2060 new_head->obj_at_put(trace_methods_offset, new_methods());
2061 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2062 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2063 new_head->obj_at_put(trace_names_offset, new_names());
2064 new_head->obj_at_put(trace_hidden_offset, NULL);
2065
2066 _head = new_head();
2067 _methods = new_methods();
2068 _bcis = new_bcis();
2069 _mirrors = new_mirrors();
2070 _names = new_names();
2071 _index = 0;
2072 }
2073
2074 oop backtrace() {
2075 return _backtrace();
2076 }
2077
2078 inline void push(Method* method, int bci, TRAPS) {
2079 // Smear the -1 bci to 0 since the array only holds unsigned
2080 // shorts. The later line number lookup would just smear the -1
2081 // to a 0 even if it could be recorded.
2082 if (bci == SynchronizationEntryBCI) bci = 0;
2083
2084 if (_index >= trace_chunk_size) {
2085 methodHandle mhandle(THREAD, method);
2086 expand(CHECK);
2087 method = mhandle();
2088 }
2089
2090 _methods->ushort_at_put(_index, method->orig_method_idnum());
2091 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2092
2093 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2094 // klass owning the symbols alive so their refcounts aren't decremented.
2095 Symbol* name = method->name();
2096 _names->symbol_at_put(_index, name);
2097
2098 // We need to save the mirrors in the backtrace to keep the class
2099 // from being unloaded while we still have this stack trace.
2100 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2101 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2102 _index++;
2103 }
2104
2105 void set_has_hidden_top_frame(TRAPS) {
2106 if (_has_hidden_top_frame == NULL) {
2107 jvalue prim;
2108 prim.z = 1;
2109 PauseNoSafepointVerifier pnsv(&_nsv);
2110 _has_hidden_top_frame = java_lang_boxing_object::create(T_BOOLEAN, &prim, CHECK);
2111 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame);
2112 }
2113 }
2114
2115 };
2116
2117 struct BacktraceElement : public StackObj {
2118 int _method_id;
2119 int _bci;
2120 int _version;
2121 Symbol* _name;
2122 Handle _mirror;
2123 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2124 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2125 };
2126
2127 class BacktraceIterator : public StackObj {
2128 int _index;
2129 objArrayHandle _result;
2130 objArrayHandle _mirrors;
2131 typeArrayHandle _methods;
2132 typeArrayHandle _bcis;
2133 typeArrayHandle _names;
2134
2135 void init(objArrayHandle result, Thread* thread) {
2136 // Get method id, bci, version and mirror from chunk
2137 _result = result;
2138 if (_result.not_null()) {
2139 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2140 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2141 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2142 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2143 _index = 0;
2144 }
2145 }
2146 public:
2147 BacktraceIterator(objArrayHandle result, Thread* thread) {
2148 init(result, thread);
2149 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2150 }
2151
2152 BacktraceElement next(Thread* thread) {
2153 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2154 _methods->ushort_at(_index),
2155 Backtrace::version_at(_bcis->int_at(_index)),
2156 Backtrace::bci_at(_bcis->int_at(_index)),
2157 _names->symbol_at(_index));
2158 _index++;
2159
2160 if (_index >= java_lang_Throwable::trace_chunk_size) {
2161 int next_offset = java_lang_Throwable::trace_next_offset;
2162 // Get next chunk
2163 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2164 init(result, thread);
2165 }
2166 return e;
2167 }
2168
2169 bool repeat() {
2170 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2171 }
2172 };
2173
2174
2175 // Print stack trace element to resource allocated buffer
2176 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2177 int version, int bci, Symbol* name) {
2178 ResourceMark rm;
2179
2180 // Get strings and string lengths
2181 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2182 const char* klass_name = holder->external_name();
2183 int buf_len = (int)strlen(klass_name);
2184
2185 char* method_name = name->as_C_string();
2186 buf_len += (int)strlen(method_name);
2187
2188 char* source_file_name = NULL;
2189 Symbol* source = Backtrace::get_source_file_name(holder, version);
2190 if (source != NULL) {
2191 source_file_name = source->as_C_string();
2192 buf_len += (int)strlen(source_file_name);
2193 }
2194
2195 char *module_name = NULL, *module_version = NULL;
2196 ModuleEntry* module = holder->module();
2197 if (module->is_named()) {
2198 module_name = module->name()->as_C_string();
2199 buf_len += (int)strlen(module_name);
2200 if (module->version() != NULL) {
2201 module_version = module->version()->as_C_string();
2202 buf_len += (int)strlen(module_version);
2203 }
2204 }
2205
2206 // Allocate temporary buffer with extra space for formatting and line number
2207 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2208
2209 // Print stack trace line in buffer
2210 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2211
2212 // Print module information
2213 if (module_name != NULL) {
2214 if (module_version != NULL) {
2215 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2216 } else {
2217 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2218 }
2219 }
2220
2221 // The method can be NULL if the requested class version is gone
2222 Method* method = holder->method_with_orig_idnum(method_id, version);
2223 if (!version_matches(method, version)) {
2224 strcat(buf, "Redefined)");
2225 } else {
2226 int line_number = Backtrace::get_line_number(method, bci);
2227 if (line_number == -2) {
2228 strcat(buf, "Native Method)");
2229 } else {
2230 if (source_file_name != NULL && (line_number != -1)) {
2231 // Sourcename and linenumber
2232 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2233 } else if (source_file_name != NULL) {
2234 // Just sourcename
2235 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2236 } else {
2237 // Neither sourcename nor linenumber
2238 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2239 }
2240 CompiledMethod* nm = method->code();
2241 if (WizardMode && nm != NULL) {
2242 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2243 }
2244 }
2245 }
2246
2247 st->print_cr("%s", buf);
2248 }
2249
2250 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2251 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2252 int method_id = method->orig_method_idnum();
2253 int version = method->constants()->version();
2254 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2255 }
2256
2257 /**
2258 * Print the throwable message and its stack trace plus all causes by walking the
2259 * cause chain. The output looks the same as of Throwable.printStackTrace().
2260 */
2261 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2262 // First, print the message.
2263 print(throwable(), st);
2264 st->cr();
2265
2266 // Now print the stack trace.
2267 Thread* THREAD = Thread::current();
2268 while (throwable.not_null()) {
2269 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2270 if (result.is_null()) {
2271 st->print_raw_cr("\t<<no stack trace available>>");
2272 return;
2273 }
2274 BacktraceIterator iter(result, THREAD);
2275
2276 while (iter.repeat()) {
2277 BacktraceElement bte = iter.next(THREAD);
2278 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2279 }
2280 {
2281 // Call getCause() which doesn't necessarily return the _cause field.
2282 EXCEPTION_MARK;
2283 JavaValue cause(T_OBJECT);
2284 JavaCalls::call_virtual(&cause,
2285 throwable,
2286 throwable->klass(),
2287 vmSymbols::getCause_name(),
2288 vmSymbols::void_throwable_signature(),
2289 THREAD);
2290 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2291 if (HAS_PENDING_EXCEPTION) {
2292 CLEAR_PENDING_EXCEPTION;
2293 throwable = Handle();
2294 } else {
2295 throwable = Handle(THREAD, (oop) cause.get_jobject());
2296 if (throwable.not_null()) {
2297 st->print("Caused by: ");
2298 print(throwable(), st);
2299 st->cr();
2300 }
2301 }
2302 }
2303 }
2304 }
2305
2306 /**
2307 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2308 */
2309 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2310 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2311 JavaValue result(T_VOID);
2312 JavaCalls::call_virtual(&result,
2313 throwable,
2314 SystemDictionary::Throwable_klass(),
2315 vmSymbols::printStackTrace_name(),
2316 vmSymbols::void_method_signature(),
2317 THREAD);
2318 }
2319
2320 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2321 if (!StackTraceInThrowable) return;
2322 ResourceMark rm(THREAD);
2323
2324 // Start out by clearing the backtrace for this object, in case the VM
2325 // runs out of memory while allocating the stack trace
2326 set_backtrace(throwable(), NULL);
2327 // Clear lazily constructed Java level stacktrace if refilling occurs
2328 // This is unnecessary in 1.7+ but harmless
2329 clear_stacktrace(throwable());
2330
2331 int max_depth = MaxJavaStackTraceDepth;
2332 JavaThread* thread = (JavaThread*)THREAD;
2333
2334 BacktraceBuilder bt(CHECK);
2335
2336 // If there is no Java frame just return the method that was being called
2337 // with bci 0
2338 if (!thread->has_last_Java_frame()) {
2339 if (max_depth >= 1 && method() != NULL) {
2340 bt.push(method(), 0, CHECK);
2341 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2342 set_depth(throwable(), 1);
2343 set_backtrace(throwable(), bt.backtrace());
2344 }
2345 return;
2346 }
2347
2348 // Instead of using vframe directly, this version of fill_in_stack_trace
2349 // basically handles everything by hand. This significantly improved the
2350 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2351 // See bug 6333838 for more details.
2352 // The "ASSERT" here is to verify this method generates the exactly same stack
2353 // trace as utilizing vframe.
2354 #ifdef ASSERT
2355 vframeStream st(thread);
2356 methodHandle st_method(THREAD, st.method());
2357 #endif
2358 int total_count = 0;
2359 RegisterMap map(thread, false);
2360 int decode_offset = 0;
2361 CompiledMethod* nm = NULL;
2362 bool skip_fillInStackTrace_check = false;
2363 bool skip_throwableInit_check = false;
2364 bool skip_hidden = !ShowHiddenFrames;
2365
2366 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2367 Method* method = NULL;
2368 int bci = 0;
2369
2370 // Compiled java method case.
2371 if (decode_offset != 0) {
2372 DebugInfoReadStream stream(nm, decode_offset);
2373 decode_offset = stream.read_int();
2374 method = (Method*)nm->metadata_at(stream.read_int());
2375 bci = stream.read_bci();
2376 } else {
2377 if (fr.is_first_frame()) break;
2378 address pc = fr.pc();
2379 if (fr.is_interpreted_frame()) {
2380 address bcp = fr.interpreter_frame_bcp();
2381 method = fr.interpreter_frame_method();
2382 bci = method->bci_from(bcp);
2383 fr = fr.sender(&map);
2384 } else {
2385 CodeBlob* cb = fr.cb();
2386 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2387 // but non nmethod
2388 fr = fr.sender(&map);
2389 if (cb == NULL || !cb->is_compiled()) {
2390 continue;
2391 }
2392 nm = cb->as_compiled_method();
2393 if (nm->method()->is_native()) {
2394 method = nm->method();
2395 bci = 0;
2396 } else {
2397 PcDesc* pd = nm->pc_desc_at(pc);
2398 decode_offset = pd->scope_decode_offset();
2399 // if decode_offset is not equal to 0, it will execute the
2400 // "compiled java method case" at the beginning of the loop.
2401 continue;
2402 }
2403 }
2404 }
2405 #ifdef ASSERT
2406 assert(st_method() == method && st.bci() == bci,
2407 "Wrong stack trace");
2408 st.next();
2409 // vframeStream::method isn't GC-safe so store off a copy
2410 // of the Method* in case we GC.
2411 if (!st.at_end()) {
2412 st_method = st.method();
2413 }
2414 #endif
2415
2416 // the format of the stacktrace will be:
2417 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2418 // - 0 or more <init> methods for the exception class (skipped)
2419 // - rest of the stack
2420
2421 if (!skip_fillInStackTrace_check) {
2422 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2423 throwable->is_a(method->method_holder())) {
2424 continue;
2425 }
2426 else {
2427 skip_fillInStackTrace_check = true; // gone past them all
2428 }
2429 }
2430 if (!skip_throwableInit_check) {
2431 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2432
2433 // skip <init> methods of the exception class and superclasses
2434 // This is simlar to classic VM.
2435 if (method->name() == vmSymbols::object_initializer_name() &&
2436 throwable->is_a(method->method_holder())) {
2437 continue;
2438 } else {
2439 // there are none or we've seen them all - either way stop checking
2440 skip_throwableInit_check = true;
2441 }
2442 }
2443 if (method->is_hidden()) {
2444 if (skip_hidden) {
2445 if (total_count == 0) {
2446 // The top frame will be hidden from the stack trace.
2447 bt.set_has_hidden_top_frame(CHECK);
2448 }
2449 continue;
2450 }
2451 }
2452 bt.push(method, bci, CHECK);
2453 total_count++;
2454 }
2455
2456 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2457
2458 // Put completed stack trace into throwable object
2459 set_backtrace(throwable(), bt.backtrace());
2460 set_depth(throwable(), total_count);
2461 }
2462
2463 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2464 // No-op if stack trace is disabled
2465 if (!StackTraceInThrowable) {
2466 return;
2467 }
2468
2469 // Disable stack traces for some preallocated out of memory errors
2470 if (!Universe::should_fill_in_stack_trace(throwable)) {
2471 return;
2472 }
2473
2474 PRESERVE_EXCEPTION_MARK;
2475
2476 JavaThread* thread = JavaThread::active();
2477 fill_in_stack_trace(throwable, method, thread);
2478 // ignore exceptions thrown during stack trace filling
2479 CLEAR_PENDING_EXCEPTION;
2480 }
2481
2482 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2483 // Allocate stack trace - backtrace is created but not filled in
2484
2485 // No-op if stack trace is disabled
2486 if (!StackTraceInThrowable) return;
2487 BacktraceBuilder bt(CHECK); // creates a backtrace
2488 set_backtrace(throwable(), bt.backtrace());
2489 }
2490
2491
2492 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2493 // Fill in stack trace into preallocated backtrace (no GC)
2494
2495 // No-op if stack trace is disabled
2496 if (!StackTraceInThrowable) return;
2497
2498 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2499
2500 JavaThread* THREAD = JavaThread::current();
2501
2502 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2503 assert(backtrace.not_null(), "backtrace should have been preallocated");
2504
2505 ResourceMark rm(THREAD);
2506 vframeStream st(THREAD);
2507
2508 BacktraceBuilder bt(THREAD, backtrace);
2509
2510 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2511 // methods as preallocated errors aren't created by "java" code.
2512
2513 // fill in as much stack trace as possible
2514 int chunk_count = 0;
2515 for (;!st.at_end(); st.next()) {
2516 bt.push(st.method(), st.bci(), CHECK);
2517 chunk_count++;
2518
2519 // Bail-out for deep stacks
2520 if (chunk_count >= trace_chunk_size) break;
2521 }
2522 set_depth(throwable(), chunk_count);
2523 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2524
2525 // We support the Throwable immutability protocol defined for Java 7.
2526 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2527 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2528 }
2529
2530 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2531 objArrayHandle stack_trace_array_h, TRAPS) {
2532
2533 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2534 THROW(vmSymbols::java_lang_NullPointerException());
2535 }
2536
2537 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2538
2539 if (stack_trace_array_h->length() != depth(throwable())) {
2540 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2541 }
2542
2543 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2544 BacktraceIterator iter(result, THREAD);
2545
2546 int index = 0;
2547 while (iter.repeat()) {
2548 BacktraceElement bte = iter.next(THREAD);
2549
2550 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2551
2552 if (stack_trace_element.is_null()) {
2553 THROW(vmSymbols::java_lang_NullPointerException());
2554 }
2555
2556 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2557 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2558
2559 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2560 method,
2561 bte._version,
2562 bte._bci,
2563 bte._name, CHECK);
2564 }
2565 }
2566
2567 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2568 Thread* THREAD = Thread::current();
2569 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable)));
2570 BacktraceIterator iter(result, THREAD);
2571 // No backtrace available.
2572 if (!iter.repeat()) return false;
2573
2574 // If the exception happened in a frame that has been hidden, i.e.,
2575 // omitted from the back trace, we can not compute the message.
2576 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2577 if (hidden != NULL) {
2578 return false;
2579 }
2580
2581 // Get first backtrace element.
2582 BacktraceElement bte = iter.next(THREAD);
2583
2584 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2585 assert(holder != NULL, "first element should be non-null");
2586 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2587
2588 // Original version is no longer available.
2589 if (m == NULL || !version_matches(m, bte._version)) {
2590 return false;
2591 }
2592
2593 *method = m;
2594 *bci = bte._bci;
2595 return true;
2596 }
2597
2598 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2599 // Allocate java.lang.StackTraceElement instance
2600 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2601 assert(k != NULL, "must be loaded in 1.4+");
2602 if (k->should_be_initialized()) {
2603 k->initialize(CHECK_0);
2604 }
2605
2606 Handle element = k->allocate_instance_handle(CHECK_0);
2607
2608 int version = method->constants()->version();
2609 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2610 return element();
2611 }
2612
2613 void java_lang_StackTraceElement::fill_in(Handle element,
2614 InstanceKlass* holder, const methodHandle& method,
2615 int version, int bci, Symbol* name, TRAPS) {
2616 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2617
2618 ResourceMark rm(THREAD);
2619 HandleMark hm(THREAD);
2620
2621 // Fill in class name
2622 Handle java_class(THREAD, holder->java_mirror());
2623 oop classname = java_lang_Class::name(java_class, CHECK);
2624 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2625 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2626
2627 oop loader = holder->class_loader();
2628 if (loader != NULL) {
2629 oop loader_name = java_lang_ClassLoader::name(loader);
2630 if (loader_name != NULL)
2631 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2632 }
2633
2634 // Fill in method name
2635 oop methodname = StringTable::intern(name, CHECK);
2636 java_lang_StackTraceElement::set_methodName(element(), methodname);
2637
2638 // Fill in module name and version
2639 ModuleEntry* module = holder->module();
2640 if (module->is_named()) {
2641 oop module_name = StringTable::intern(module->name(), CHECK);
2642 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2643 oop module_version;
2644 if (module->version() != NULL) {
2645 module_version = StringTable::intern(module->version(), CHECK);
2646 } else {
2647 module_version = NULL;
2648 }
2649 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2650 }
2651
2652 if (method() == NULL || !version_matches(method(), version)) {
2653 // The method was redefined, accurate line number information isn't available
2654 java_lang_StackTraceElement::set_fileName(element(), NULL);
2655 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2656 } else {
2657 // Fill in source file name and line number.
2658 Symbol* source = Backtrace::get_source_file_name(holder, version);
2659 oop source_file = java_lang_Class::source_file(java_class());
2660 if (source != NULL) {
2661 // Class was not redefined. We can trust its cache if set,
2662 // else we have to initialize it.
2663 if (source_file == NULL) {
2664 source_file = StringTable::intern(source, CHECK);
2665 java_lang_Class::set_source_file(java_class(), source_file);
2666 }
2667 } else {
2668 // Class was redefined. Dump the cache if it was set.
2669 if (source_file != NULL) {
2670 source_file = NULL;
2671 java_lang_Class::set_source_file(java_class(), source_file);
2672 }
2673 }
2674 java_lang_StackTraceElement::set_fileName(element(), source_file);
2675
2676 int line_number = Backtrace::get_line_number(method, bci);
2677 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2678 }
2679 }
2680
2681 #if INCLUDE_JVMCI
2682 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2683 int method_id = method->orig_method_idnum();
2684 int cpref = method->name_index();
2685 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2686 }
2687
2688 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2689 // Fill in class name
2690 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2691 Method* method = holder->method_with_orig_idnum(method_id, version);
2692
2693 // The method can be NULL if the requested class version is gone
2694 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2695
2696 // Fill in method name
2697 methodname = sym;
2698
2699 if (!version_matches(method, version)) {
2700 // If the method was redefined, accurate line number information isn't available
2701 filename = NULL;
2702 line_number = -1;
2703 } else {
2704 // Fill in source file name and line number.
2705 // Use a specific ik version as a holder since the mirror might
2706 // refer to a version that is now obsolete and no longer accessible
2707 // via the previous versions list.
2708 holder = holder->get_klass_version(version);
2709 assert(holder != NULL, "sanity check");
2710 filename = holder->source_file_name();
2711 line_number = Backtrace::get_line_number(method, bci);
2712 }
2713 }
2714 #endif // INCLUDE_JVMCI
2715
2716 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2717 HandleMark hm(THREAD);
2718 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2719 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2720 // we should expand MemberName::name when Throwable uses StackTrace
2721 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2722 return method;
2723 }
2724
2725 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2726 // set Method* or mid/cpref
2727 HandleMark hm(THREAD);
2728 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2729 InstanceKlass* ik = method->method_holder();
2730 CallInfo info(method(), ik, CHECK);
2731 MethodHandles::init_method_MemberName(mname, info);
2732 // set bci
2733 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2734 // method may be redefined; store the version
2735 int version = method->constants()->version();
2736 assert((jushort)version == version, "version should be short");
2737 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2738 }
2739
2740 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2741 ResourceMark rm(THREAD);
2742 HandleMark hm(THREAD);
2743 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2744 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2745 InstanceKlass* holder = InstanceKlass::cast(clazz);
2746 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2747
2748 short version = stackFrame->short_field(_version_offset);
2749 int bci = stackFrame->int_field(_bci_offset);
2750 Symbol* name = method->name();
2751 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2752 }
2753
2754 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2755 macro(_memberName_offset, k, "memberName", object_signature, false); \
2756 macro(_bci_offset, k, "bci", int_signature, false)
2757
2758 void java_lang_StackFrameInfo::compute_offsets() {
2759 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2760 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2761 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2762 }
2763
2764 #if INCLUDE_CDS
2765 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2766 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2767 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2768 }
2769 #endif
2770
2771 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2772 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2773 macro(_locals_offset, k, "locals", object_array_signature, false); \
2774 macro(_operands_offset, k, "operands", object_array_signature, false); \
2775 macro(_mode_offset, k, "mode", int_signature, false)
2776
2777 void java_lang_LiveStackFrameInfo::compute_offsets() {
2778 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2779 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2780 }
2781
2782 #if INCLUDE_CDS
2783 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2784 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2785 }
2786 #endif
2787
2788 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2789 macro(override_offset, k, "override", bool_signature, false)
2790
2791 void java_lang_reflect_AccessibleObject::compute_offsets() {
2792 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2793 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2794 }
2795
2796 #if INCLUDE_CDS
2797 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2798 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2799 }
2800 #endif
2801
2802 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2804 return (jboolean) reflect->bool_field(override_offset);
2805 }
2806
2807 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2809 reflect->bool_field_put(override_offset, (int) value);
2810 }
2811
2812 #define METHOD_FIELDS_DO(macro) \
2813 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2814 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2815 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2816 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2817 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2818 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2819 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2820 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2821 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2822 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2823 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2824
2825 void java_lang_reflect_Method::compute_offsets() {
2826 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2827 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2828 }
2829
2830 #if INCLUDE_CDS
2831 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2832 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2833 }
2834 #endif
2835
2836 Handle java_lang_reflect_Method::create(TRAPS) {
2837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2838 Klass* klass = SystemDictionary::reflect_Method_klass();
2839 // This class is eagerly initialized during VM initialization, since we keep a refence
2840 // to one of the methods
2841 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2842 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2843 }
2844
2845 oop java_lang_reflect_Method::clazz(oop reflect) {
2846 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2847 return reflect->obj_field(clazz_offset);
2848 }
2849
2850 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2852 reflect->obj_field_put(clazz_offset, value);
2853 }
2854
2855 int java_lang_reflect_Method::slot(oop reflect) {
2856 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2857 return reflect->int_field(slot_offset);
2858 }
2859
2860 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2862 reflect->int_field_put(slot_offset, value);
2863 }
2864
2865 void java_lang_reflect_Method::set_name(oop method, oop value) {
2866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2867 method->obj_field_put(name_offset, value);
2868 }
2869
2870 oop java_lang_reflect_Method::return_type(oop method) {
2871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2872 return method->obj_field(returnType_offset);
2873 }
2874
2875 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877 method->obj_field_put(returnType_offset, value);
2878 }
2879
2880 oop java_lang_reflect_Method::parameter_types(oop method) {
2881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882 return method->obj_field(parameterTypes_offset);
2883 }
2884
2885 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887 method->obj_field_put(parameterTypes_offset, value);
2888 }
2889
2890 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892 method->obj_field_put(exceptionTypes_offset, value);
2893 }
2894
2895 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897 method->int_field_put(modifiers_offset, value);
2898 }
2899
2900 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902 method->obj_field_put(signature_offset, value);
2903 }
2904
2905 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2907 method->obj_field_put(annotations_offset, value);
2908 }
2909
2910 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2912 method->obj_field_put(parameter_annotations_offset, value);
2913 }
2914
2915 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2917 method->obj_field_put(annotation_default_offset, value);
2918 }
2919
2920 #define CONSTRUCTOR_FIELDS_DO(macro) \
2921 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2922 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2923 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2924 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2925 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2926 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2927 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2928 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2929
2930 void java_lang_reflect_Constructor::compute_offsets() {
2931 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2932 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2933 }
2934
2935 #if INCLUDE_CDS
2936 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2937 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2938 }
2939 #endif
2940
2941 Handle java_lang_reflect_Constructor::create(TRAPS) {
2942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2943 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2944 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2945 InstanceKlass* ik = InstanceKlass::cast(k);
2946 // Ensure it is initialized
2947 ik->initialize(CHECK_NH);
2948 return ik->allocate_instance_handle(THREAD);
2949 }
2950
2951 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2953 return reflect->obj_field(clazz_offset);
2954 }
2955
2956 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2958 reflect->obj_field_put(clazz_offset, value);
2959 }
2960
2961 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2963 return constructor->obj_field(parameterTypes_offset);
2964 }
2965
2966 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2968 constructor->obj_field_put(parameterTypes_offset, value);
2969 }
2970
2971 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2973 constructor->obj_field_put(exceptionTypes_offset, value);
2974 }
2975
2976 int java_lang_reflect_Constructor::slot(oop reflect) {
2977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2978 return reflect->int_field(slot_offset);
2979 }
2980
2981 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2983 reflect->int_field_put(slot_offset, value);
2984 }
2985
2986 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988 constructor->int_field_put(modifiers_offset, value);
2989 }
2990
2991 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2993 constructor->obj_field_put(signature_offset, value);
2994 }
2995
2996 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2998 constructor->obj_field_put(annotations_offset, value);
2999 }
3000
3001 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3003 method->obj_field_put(parameter_annotations_offset, value);
3004 }
3005
3006 #define FIELD_FIELDS_DO(macro) \
3007 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3008 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3009 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3010 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3011 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3012 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3013 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3014
3015 void java_lang_reflect_Field::compute_offsets() {
3016 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3017 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3018 }
3019
3020 #if INCLUDE_CDS
3021 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3022 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3023 }
3024 #endif
3025
3026 Handle java_lang_reflect_Field::create(TRAPS) {
3027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3028 Symbol* name = vmSymbols::java_lang_reflect_Field();
3029 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3030 InstanceKlass* ik = InstanceKlass::cast(k);
3031 // Ensure it is initialized
3032 ik->initialize(CHECK_NH);
3033 return ik->allocate_instance_handle(THREAD);
3034 }
3035
3036 oop java_lang_reflect_Field::clazz(oop reflect) {
3037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3038 return reflect->obj_field(clazz_offset);
3039 }
3040
3041 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3043 reflect->obj_field_put(clazz_offset, value);
3044 }
3045
3046 oop java_lang_reflect_Field::name(oop field) {
3047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3048 return field->obj_field(name_offset);
3049 }
3050
3051 void java_lang_reflect_Field::set_name(oop field, oop value) {
3052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3053 field->obj_field_put(name_offset, value);
3054 }
3055
3056 oop java_lang_reflect_Field::type(oop field) {
3057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3058 return field->obj_field(type_offset);
3059 }
3060
3061 void java_lang_reflect_Field::set_type(oop field, oop value) {
3062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3063 field->obj_field_put(type_offset, value);
3064 }
3065
3066 int java_lang_reflect_Field::slot(oop reflect) {
3067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3068 return reflect->int_field(slot_offset);
3069 }
3070
3071 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3073 reflect->int_field_put(slot_offset, value);
3074 }
3075
3076 int java_lang_reflect_Field::modifiers(oop field) {
3077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3078 return field->int_field(modifiers_offset);
3079 }
3080
3081 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3083 field->int_field_put(modifiers_offset, value);
3084 }
3085
3086 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3088 field->obj_field_put(signature_offset, value);
3089 }
3090
3091 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3093 field->obj_field_put(annotations_offset, value);
3094 }
3095
3096 #define CONSTANTPOOL_FIELDS_DO(macro) \
3097 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3098
3099 void reflect_ConstantPool::compute_offsets() {
3100 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3101 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3102 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3103 }
3104
3105 #if INCLUDE_CDS
3106 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3107 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3108 }
3109 #endif
3110
3111 #define PARAMETER_FIELDS_DO(macro) \
3112 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3113 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3114 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3115 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3116
3117 void java_lang_reflect_Parameter::compute_offsets() {
3118 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3119 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3120 }
3121
3122 #if INCLUDE_CDS
3123 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3124 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3125 }
3126 #endif
3127
3128 Handle java_lang_reflect_Parameter::create(TRAPS) {
3129 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3130 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3131 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3132 InstanceKlass* ik = InstanceKlass::cast(k);
3133 // Ensure it is initialized
3134 ik->initialize(CHECK_NH);
3135 return ik->allocate_instance_handle(THREAD);
3136 }
3137
3138 oop java_lang_reflect_Parameter::name(oop param) {
3139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3140 return param->obj_field(name_offset);
3141 }
3142
3143 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3145 param->obj_field_put(name_offset, value);
3146 }
3147
3148 int java_lang_reflect_Parameter::modifiers(oop param) {
3149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3150 return param->int_field(modifiers_offset);
3151 }
3152
3153 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3155 param->int_field_put(modifiers_offset, value);
3156 }
3157
3158 int java_lang_reflect_Parameter::index(oop param) {
3159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3160 return param->int_field(index_offset);
3161 }
3162
3163 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3165 param->int_field_put(index_offset, value);
3166 }
3167
3168 oop java_lang_reflect_Parameter::executable(oop param) {
3169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3170 return param->obj_field(executable_offset);
3171 }
3172
3173 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3175 param->obj_field_put(executable_offset, value);
3176 }
3177
3178
3179 int java_lang_Module::loader_offset;
3180 int java_lang_Module::name_offset;
3181 int java_lang_Module::_module_entry_offset = -1;
3182
3183 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3185 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3186 vmSymbols::java_lang_module_init_signature(),
3187 loader, module_name, CHECK_NH);
3188 }
3189
3190 #define MODULE_FIELDS_DO(macro) \
3191 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3192 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3193
3194 void java_lang_Module::compute_offsets() {
3195 InstanceKlass* k = SystemDictionary::Module_klass();
3196 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3197 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3198 }
3199
3200 #if INCLUDE_CDS
3201 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3202 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3203 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3204 }
3205 #endif
3206
3207 oop java_lang_Module::loader(oop module) {
3208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3209 return module->obj_field(loader_offset);
3210 }
3211
3212 void java_lang_Module::set_loader(oop module, oop value) {
3213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3214 module->obj_field_put(loader_offset, value);
3215 }
3216
3217 oop java_lang_Module::name(oop module) {
3218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3219 return module->obj_field(name_offset);
3220 }
3221
3222 void java_lang_Module::set_name(oop module, oop value) {
3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3224 module->obj_field_put(name_offset, value);
3225 }
3226
3227 ModuleEntry* java_lang_Module::module_entry(oop module) {
3228 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3229 assert(module != NULL, "module can't be null");
3230 assert(oopDesc::is_oop(module), "module must be oop");
3231
3232 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3233 if (module_entry == NULL) {
3234 // If the inject field containing the ModuleEntry* is null then return the
3235 // class loader's unnamed module.
3236 oop loader = java_lang_Module::loader(module);
3237 Handle h_loader = Handle(Thread::current(), loader);
3238 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3239 return loader_cld->unnamed_module();
3240 }
3241 return module_entry;
3242 }
3243
3244 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3245 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3246 assert(module != NULL, "module can't be null");
3247 assert(oopDesc::is_oop(module), "module must be oop");
3248 module->address_field_put(_module_entry_offset, (address)module_entry);
3249 }
3250
3251 Handle reflect_ConstantPool::create(TRAPS) {
3252 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3253 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3254 // Ensure it is initialized
3255 k->initialize(CHECK_NH);
3256 return k->allocate_instance_handle(THREAD);
3257 }
3258
3259
3260 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3261 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3262 oop mirror = value->pool_holder()->java_mirror();
3263 // Save the mirror to get back the constant pool.
3264 reflect->obj_field_put(_oop_offset, mirror);
3265 }
3266
3267 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3269
3270 oop mirror = reflect->obj_field(_oop_offset);
3271 Klass* k = java_lang_Class::as_Klass(mirror);
3272 assert(k->is_instance_klass(), "Must be");
3273
3274 // Get the constant pool back from the klass. Since class redefinition
3275 // merges the new constant pool into the old, this is essentially the
3276 // same constant pool as the original. If constant pool merging is
3277 // no longer done in the future, this will have to change to save
3278 // the original.
3279 return InstanceKlass::cast(k)->constants();
3280 }
3281
3282 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3283 macro(_base_offset, k, "base", object_signature, false)
3284
3285 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3286 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3287 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3288 }
3289
3290 #if INCLUDE_CDS
3291 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3292 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3293 }
3294 #endif
3295
3296 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3297 Klass* k = SystemDictionary::box_klass(type);
3298 if (k == NULL) return NULL;
3299 InstanceKlass* ik = InstanceKlass::cast(k);
3300 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3301 return ik->allocate_instance(THREAD);
3302 }
3303
3304
3305 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3306 oop box = initialize_and_allocate(type, CHECK_0);
3307 if (box == NULL) return NULL;
3308 switch (type) {
3309 case T_BOOLEAN:
3310 box->bool_field_put(value_offset, value->z);
3311 break;
3312 case T_CHAR:
3313 box->char_field_put(value_offset, value->c);
3314 break;
3315 case T_FLOAT:
3316 box->float_field_put(value_offset, value->f);
3317 break;
3318 case T_DOUBLE:
3319 box->double_field_put(long_value_offset, value->d);
3320 break;
3321 case T_BYTE:
3322 box->byte_field_put(value_offset, value->b);
3323 break;
3324 case T_SHORT:
3325 box->short_field_put(value_offset, value->s);
3326 break;
3327 case T_INT:
3328 box->int_field_put(value_offset, value->i);
3329 break;
3330 case T_LONG:
3331 box->long_field_put(long_value_offset, value->j);
3332 break;
3333 default:
3334 return NULL;
3335 }
3336 return box;
3337 }
3338
3339
3340 BasicType java_lang_boxing_object::basic_type(oop box) {
3341 if (box == NULL) return T_ILLEGAL;
3342 BasicType type = SystemDictionary::box_klass_type(box->klass());
3343 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3344 return T_ILLEGAL;
3345 return type;
3346 }
3347
3348
3349 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3350 BasicType type = SystemDictionary::box_klass_type(box->klass());
3351 switch (type) {
3352 case T_BOOLEAN:
3353 value->z = box->bool_field(value_offset);
3354 break;
3355 case T_CHAR:
3356 value->c = box->char_field(value_offset);
3357 break;
3358 case T_FLOAT:
3359 value->f = box->float_field(value_offset);
3360 break;
3361 case T_DOUBLE:
3362 value->d = box->double_field(long_value_offset);
3363 break;
3364 case T_BYTE:
3365 value->b = box->byte_field(value_offset);
3366 break;
3367 case T_SHORT:
3368 value->s = box->short_field(value_offset);
3369 break;
3370 case T_INT:
3371 value->i = box->int_field(value_offset);
3372 break;
3373 case T_LONG:
3374 value->j = box->long_field(long_value_offset);
3375 break;
3376 default:
3377 return T_ILLEGAL;
3378 } // end switch
3379 return type;
3380 }
3381
3382
3383 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3384 BasicType type = SystemDictionary::box_klass_type(box->klass());
3385 switch (type) {
3386 case T_BOOLEAN:
3387 box->bool_field_put(value_offset, value->z);
3388 break;
3389 case T_CHAR:
3390 box->char_field_put(value_offset, value->c);
3391 break;
3392 case T_FLOAT:
3393 box->float_field_put(value_offset, value->f);
3394 break;
3395 case T_DOUBLE:
3396 box->double_field_put(long_value_offset, value->d);
3397 break;
3398 case T_BYTE:
3399 box->byte_field_put(value_offset, value->b);
3400 break;
3401 case T_SHORT:
3402 box->short_field_put(value_offset, value->s);
3403 break;
3404 case T_INT:
3405 box->int_field_put(value_offset, value->i);
3406 break;
3407 case T_LONG:
3408 box->long_field_put(long_value_offset, value->j);
3409 break;
3410 default:
3411 return T_ILLEGAL;
3412 } // end switch
3413 return type;
3414 }
3415
3416
3417 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3418 switch (type) {
3419 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3420 case T_CHAR: st->print("%d", value->c); break;
3421 case T_BYTE: st->print("%d", value->b); break;
3422 case T_SHORT: st->print("%d", value->s); break;
3423 case T_INT: st->print("%d", value->i); break;
3424 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3425 case T_FLOAT: st->print("%f", value->f); break;
3426 case T_DOUBLE: st->print("%lf", value->d); break;
3427 default: st->print("type %d?", type); break;
3428 }
3429 }
3430
3431 // Support for java_lang_ref_Reference
3432
3433 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3434 assert(obj != NULL, "sanity");
3435 if (offset != java_lang_ref_Reference::referent_offset) {
3436 return false;
3437 }
3438
3439 Klass* k = obj->klass();
3440 if (!k->is_instance_klass()) {
3441 return false;
3442 }
3443
3444 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3445 bool is_reference = ik->reference_type() != REF_NONE;
3446 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3447 return is_reference;
3448 }
3449
3450 // Support for java_lang_ref_SoftReference
3451 //
3452
3453 #define SOFTREFERENCE_FIELDS_DO(macro) \
3454 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3455 macro(static_clock_offset, k, "clock", long_signature, true)
3456
3457 void java_lang_ref_SoftReference::compute_offsets() {
3458 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3459 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3460 }
3461
3462 #if INCLUDE_CDS
3463 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3464 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3465 }
3466 #endif
3467
3468 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3469 return ref->long_field(timestamp_offset);
3470 }
3471
3472 jlong java_lang_ref_SoftReference::clock() {
3473 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3474 oop base = ik->static_field_base_raw();
3475 return base->long_field(static_clock_offset);
3476 }
3477
3478 void java_lang_ref_SoftReference::set_clock(jlong value) {
3479 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3480 oop base = ik->static_field_base_raw();
3481 base->long_field_put(static_clock_offset, value);
3482 }
3483
3484 // Support for java_lang_invoke_DirectMethodHandle
3485
3486 int java_lang_invoke_DirectMethodHandle::_member_offset;
3487
3488 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3489 oop member_name = NULL;
3490 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3491 "a DirectMethodHandle oop is expected");
3492 return dmh->obj_field(member_offset_in_bytes());
3493 }
3494
3495 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3496 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3497
3498 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3499 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3500 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3501 }
3502
3503 #if INCLUDE_CDS
3504 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3505 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3506 }
3507 #endif
3508
3509 // Support for java_lang_invoke_MethodHandle
3510
3511 int java_lang_invoke_MethodHandle::_type_offset;
3512 int java_lang_invoke_MethodHandle::_form_offset;
3513
3514 int java_lang_invoke_MemberName::_clazz_offset;
3515 int java_lang_invoke_MemberName::_name_offset;
3516 int java_lang_invoke_MemberName::_type_offset;
3517 int java_lang_invoke_MemberName::_flags_offset;
3518 int java_lang_invoke_MemberName::_method_offset;
3519 int java_lang_invoke_MemberName::_vmindex_offset;
3520
3521 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3522 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3523
3524 int java_lang_invoke_LambdaForm::_vmentry_offset;
3525
3526 #define METHODHANDLE_FIELDS_DO(macro) \
3527 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3528 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3529
3530 void java_lang_invoke_MethodHandle::compute_offsets() {
3531 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3532 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3533 }
3534
3535 #if INCLUDE_CDS
3536 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3537 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3538 }
3539 #endif
3540
3541 #define MEMBERNAME_FIELDS_DO(macro) \
3542 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3543 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3544 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3545 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3546 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3547
3548 void java_lang_invoke_MemberName::compute_offsets() {
3549 InstanceKlass* k = SystemDictionary::MemberName_klass();
3550 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3551 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3552 }
3553
3554 #if INCLUDE_CDS
3555 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3556 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3557 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3558 }
3559 #endif
3560
3561 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3562 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3563 assert(k != NULL, "jdk mismatch");
3564 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3565 }
3566
3567 #if INCLUDE_CDS
3568 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3569 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3570 }
3571 #endif
3572
3573 #define LAMBDAFORM_FIELDS_DO(macro) \
3574 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3575
3576 void java_lang_invoke_LambdaForm::compute_offsets() {
3577 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3578 assert (k != NULL, "jdk mismatch");
3579 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3580 }
3581
3582 #if INCLUDE_CDS
3583 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3584 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3585 }
3586 #endif
3587
3588 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3589 return obj != NULL && is_subclass(obj->klass());
3590 }
3591
3592
3593 oop java_lang_invoke_MethodHandle::type(oop mh) {
3594 return mh->obj_field(_type_offset);
3595 }
3596
3597 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3598 mh->obj_field_put(_type_offset, mtype);
3599 }
3600
3601 oop java_lang_invoke_MethodHandle::form(oop mh) {
3602 assert(_form_offset != 0, "");
3603 return mh->obj_field(_form_offset);
3604 }
3605
3606 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3607 assert(_form_offset != 0, "");
3608 mh->obj_field_put(_form_offset, lform);
3609 }
3610
3611 /// MemberName accessors
3612
3613 oop java_lang_invoke_MemberName::clazz(oop mname) {
3614 assert(is_instance(mname), "wrong type");
3615 return mname->obj_field(_clazz_offset);
3616 }
3617
3618 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3619 assert(is_instance(mname), "wrong type");
3620 mname->obj_field_put(_clazz_offset, clazz);
3621 }
3622
3623 oop java_lang_invoke_MemberName::name(oop mname) {
3624 assert(is_instance(mname), "wrong type");
3625 return mname->obj_field(_name_offset);
3626 }
3627
3628 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3629 assert(is_instance(mname), "wrong type");
3630 mname->obj_field_put(_name_offset, name);
3631 }
3632
3633 oop java_lang_invoke_MemberName::type(oop mname) {
3634 assert(is_instance(mname), "wrong type");
3635 return mname->obj_field(_type_offset);
3636 }
3637
3638 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3639 assert(is_instance(mname), "wrong type");
3640 mname->obj_field_put(_type_offset, type);
3641 }
3642
3643 int java_lang_invoke_MemberName::flags(oop mname) {
3644 assert(is_instance(mname), "wrong type");
3645 return mname->int_field(_flags_offset);
3646 }
3647
3648 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3649 assert(is_instance(mname), "wrong type");
3650 mname->int_field_put(_flags_offset, flags);
3651 }
3652
3653
3654 // Return vmtarget from ResolvedMethodName method field through indirection
3655 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3656 assert(is_instance(mname), "wrong type");
3657 oop method = mname->obj_field(_method_offset);
3658 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3659 }
3660
3661 bool java_lang_invoke_MemberName::is_method(oop mname) {
3662 assert(is_instance(mname), "must be MemberName");
3663 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3664 }
3665
3666 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3667 assert(is_instance(mname), "wrong type");
3668 mname->obj_field_put(_method_offset, resolved_method);
3669 }
3670
3671 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3672 assert(is_instance(mname), "wrong type");
3673 return (intptr_t) mname->address_field(_vmindex_offset);
3674 }
3675
3676 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3677 assert(is_instance(mname), "wrong type");
3678 mname->address_field_put(_vmindex_offset, (address) index);
3679 }
3680
3681
3682 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3683 assert(is_instance(resolved_method), "wrong type");
3684 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3685 assert(m->is_method(), "must be");
3686 return m;
3687 }
3688
3689 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3690 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3691 assert(is_instance(resolved_method), "wrong type");
3692 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3693 }
3694
3695 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3696 assert(is_instance(resolved_method), "wrong type");
3697 resolved_method->obj_field_put(_vmholder_offset, holder);
3698 }
3699
3700 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3701 const Method* method = m();
3702
3703 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3704 oop resolved_method = ResolvedMethodTable::find_method(method);
3705 if (resolved_method != NULL) {
3706 return resolved_method;
3707 }
3708
3709 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3710 if (!k->is_initialized()) {
3711 k->initialize(CHECK_NULL);
3712 }
3713
3714 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3715
3716 NoSafepointVerifier nsv;
3717
3718 if (method->is_old()) {
3719 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3720 method->get_new_method();
3721 }
3722
3723 InstanceKlass* holder = method->method_holder();
3724
3725 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3726 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3727 // distinct loaders) to ensure the metadata is kept alive.
3728 // This mirror may be different than the one in clazz field.
3729 set_vmholder(new_resolved_method, holder->java_mirror());
3730
3731 // Set flag in class to indicate this InstanceKlass has entries in the table
3732 // to avoid walking table during redefinition if none of the redefined classes
3733 // have any membernames in the table.
3734 holder->set_has_resolved_methods();
3735
3736 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3737 }
3738
3739 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3740 assert(is_instance(lform), "wrong type");
3741 return lform->obj_field(_vmentry_offset);
3742 }
3743
3744
3745 // Support for java_lang_invoke_MethodType
3746
3747 int java_lang_invoke_MethodType::_rtype_offset;
3748 int java_lang_invoke_MethodType::_ptypes_offset;
3749
3750 #define METHODTYPE_FIELDS_DO(macro) \
3751 macro(_rtype_offset, k, "rtype", class_signature, false); \
3752 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3753
3754 void java_lang_invoke_MethodType::compute_offsets() {
3755 InstanceKlass* k = SystemDictionary::MethodType_klass();
3756 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3757 }
3758
3759 #if INCLUDE_CDS
3760 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3761 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3762 }
3763 #endif
3764
3765 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3766 st->print("(");
3767 objArrayOop pts = ptypes(mt);
3768 for (int i = 0, limit = pts->length(); i < limit; i++) {
3769 java_lang_Class::print_signature(pts->obj_at(i), st);
3770 }
3771 st->print(")");
3772 java_lang_Class::print_signature(rtype(mt), st);
3773 }
3774
3775 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3776 ResourceMark rm;
3777 stringStream buffer(128);
3778 print_signature(mt, &buffer);
3779 const char* sigstr = buffer.base();
3780 int siglen = (int) buffer.size();
3781 Symbol *name;
3782 if (!intern_if_not_found) {
3783 name = SymbolTable::probe(sigstr, siglen);
3784 } else {
3785 name = SymbolTable::new_symbol(sigstr, siglen);
3786 }
3787 return name;
3788 }
3789
3790 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3791 if (mt1 == mt2)
3792 return true;
3793 if (rtype(mt1) != rtype(mt2))
3794 return false;
3795 if (ptype_count(mt1) != ptype_count(mt2))
3796 return false;
3797 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3798 if (ptype(mt1, i) != ptype(mt2, i))
3799 return false;
3800 }
3801 return true;
3802 }
3803
3804 oop java_lang_invoke_MethodType::rtype(oop mt) {
3805 assert(is_instance(mt), "must be a MethodType");
3806 return mt->obj_field(_rtype_offset);
3807 }
3808
3809 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3810 assert(is_instance(mt), "must be a MethodType");
3811 return (objArrayOop) mt->obj_field(_ptypes_offset);
3812 }
3813
3814 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3815 return ptypes(mt)->obj_at(idx);
3816 }
3817
3818 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3819 return ptypes(mt)->length();
3820 }
3821
3822 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3823 objArrayOop pts = ptypes(mt);
3824 int count = pts->length();
3825 int slots = 0;
3826 for (int i = 0; i < count; i++) {
3827 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3828 slots += type2size[bt];
3829 }
3830 return slots;
3831 }
3832
3833 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3834 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3835 return type2size[bt];
3836 }
3837
3838
3839 // Support for java_lang_invoke_CallSite
3840
3841 int java_lang_invoke_CallSite::_target_offset;
3842 int java_lang_invoke_CallSite::_context_offset;
3843
3844 #define CALLSITE_FIELDS_DO(macro) \
3845 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3846 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3847
3848 void java_lang_invoke_CallSite::compute_offsets() {
3849 InstanceKlass* k = SystemDictionary::CallSite_klass();
3850 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3851 }
3852
3853 #if INCLUDE_CDS
3854 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3855 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3856 }
3857 #endif
3858
3859 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3860 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3861
3862 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3863 return dep_oop;
3864 }
3865
3866 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3867
3868 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3869 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3870
3871 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3872 InstanceKlass* k = SystemDictionary::Context_klass();
3873 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3874 }
3875
3876 #if INCLUDE_CDS
3877 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3878 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3879 }
3880 #endif
3881
3882 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3883 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3884 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3885 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3886 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3887 return dep_ctx;
3888 }
3889
3890 // Support for java_security_AccessControlContext
3891
3892 int java_security_AccessControlContext::_context_offset = 0;
3893 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3894 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3895 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3896
3897 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3898 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3899 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3900 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3901 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3902
3903 void java_security_AccessControlContext::compute_offsets() {
3904 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3905 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3906 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3907 }
3908
3909 #if INCLUDE_CDS
3910 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3911 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3912 }
3913 #endif
3914
3915 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3916 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3917 // Ensure klass is initialized
3918 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3919 // Allocate result
3920 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3921 // Fill in values
3922 result->obj_field_put(_context_offset, context());
3923 result->obj_field_put(_privilegedContext_offset, privileged_context());
3924 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3925 // whitelist AccessControlContexts created by the JVM if present
3926 if (_isAuthorized_offset != -1) {
3927 result->bool_field_put(_isAuthorized_offset, true);
3928 }
3929 return result;
3930 }
3931
3932
3933 // Support for java_lang_ClassLoader
3934
3935 bool java_lang_ClassLoader::offsets_computed = false;
3936 int java_lang_ClassLoader::_loader_data_offset = -1;
3937 int java_lang_ClassLoader::parallelCapable_offset = -1;
3938 int java_lang_ClassLoader::name_offset = -1;
3939 int java_lang_ClassLoader::nameAndId_offset = -1;
3940 int java_lang_ClassLoader::unnamedModule_offset = -1;
3941
3942 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3943 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3944 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3945 }
3946
3947 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3948 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3949 return RawAccess<>::load_at(loader, _loader_data_offset);
3950 }
3951
3952 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3953 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3954 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3955 }
3956
3957 #define CLASSLOADER_FIELDS_DO(macro) \
3958 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3959 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3960 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3961 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3962 macro(parent_offset, k1, "parent", classloader_signature, false)
3963
3964 void java_lang_ClassLoader::compute_offsets() {
3965 assert(!offsets_computed, "offsets should be initialized only once");
3966 offsets_computed = true;
3967
3968 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3969 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3970
3971 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3972 }
3973
3974 #if INCLUDE_CDS
3975 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3976 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3977 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3978 }
3979 #endif
3980
3981 oop java_lang_ClassLoader::parent(oop loader) {
3982 assert(is_instance(loader), "loader must be oop");
3983 return loader->obj_field(parent_offset);
3984 }
3985
3986 // Returns the name field of this class loader. If the name field has not
3987 // been set, null will be returned.
3988 oop java_lang_ClassLoader::name(oop loader) {
3989 assert(is_instance(loader), "loader must be oop");
3990 return loader->obj_field(name_offset);
3991 }
3992
3993 // Returns the nameAndId field of this class loader. The format is
3994 // as follows:
3995 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
3996 // If the defining loader has no name then <qualified-class-name> @<id>
3997 // If built-in loader, then omit '@<id>' as there is only one instance.
3998 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3999 oop java_lang_ClassLoader::nameAndId(oop loader) {
4000 assert(is_instance(loader), "loader must be oop");
4001 return loader->obj_field(nameAndId_offset);
4002 }
4003
4004 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4005 assert(is_instance(loader), "loader must be oop");
4006 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4007 oop acl = loader;
4008 debug_only(jint loop_count = 0);
4009 // This loop taken verbatim from ClassLoader.java:
4010 do {
4011 acl = parent(acl);
4012 if (cl == acl) {
4013 return true;
4014 }
4015 assert(++loop_count > 0, "loop_count overflow");
4016 } while (acl != NULL);
4017 return false;
4018 }
4019
4020 bool java_lang_ClassLoader::is_instance(oop obj) {
4021 return obj != NULL && is_subclass(obj->klass());
4022 }
4023
4024
4025 // For class loader classes, parallelCapable defined
4026 // based on non-null field
4027 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4028 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4029 if (parallelCapable_offset == -1) {
4030 // Default for backward compatibility is false
4031 return false;
4032 }
4033 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4034 }
4035
4036 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4037 // Fix for 4474172; see evaluation for more details
4038 loader = non_reflection_class_loader(loader);
4039
4040 oop cl = SystemDictionary::java_system_loader();
4041 while(cl != NULL) {
4042 if (cl == loader) return true;
4043 cl = parent(cl);
4044 }
4045 return false;
4046 }
4047
4048 // Return true if this is one of the class loaders associated with
4049 // the generated bytecodes for reflection.
4050 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4051 if (loader != NULL) {
4052 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4053 // This might be null in non-1.4 JDKs
4054 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4055 }
4056 return false;
4057 }
4058
4059 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4060 // See whether this is one of the class loaders associated with
4061 // the generated bytecodes for reflection, and if so, "magically"
4062 // delegate to its parent to prevent class loading from occurring
4063 // in places where applications using reflection didn't expect it.
4064 if (is_reflection_class_loader(loader)) {
4065 return parent(loader);
4066 }
4067 return loader;
4068 }
4069
4070 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4071 assert(is_instance(loader), "loader must be oop");
4072 return loader->obj_field(unnamedModule_offset);
4073 }
4074
4075 // Support for java_lang_System
4076 //
4077 #define SYSTEM_FIELDS_DO(macro) \
4078 macro(static_in_offset, k, "in", input_stream_signature, true); \
4079 macro(static_out_offset, k, "out", print_stream_signature, true); \
4080 macro(static_err_offset, k, "err", print_stream_signature, true); \
4081 macro(static_security_offset, k, "security", security_manager_signature, true)
4082
4083 void java_lang_System::compute_offsets() {
4084 InstanceKlass* k = SystemDictionary::System_klass();
4085 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4086 }
4087
4088 #if INCLUDE_CDS
4089 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4090 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4091 }
4092 #endif
4093
4094 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4095 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4096 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4097
4098 // Support for jdk_internal_misc_UnsafeConstants
4099 //
4100 class UnsafeConstantsFixup : public FieldClosure {
4101 private:
4102 int _address_size;
4103 int _page_size;
4104 bool _big_endian;
4105 bool _use_unaligned_access;
4106 int _data_cache_line_flush_size;
4107 public:
4108 UnsafeConstantsFixup() {
4109 // round up values for all static final fields
4110 _address_size = sizeof(void*);
4111 _page_size = os::vm_page_size();
4112 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4113 _use_unaligned_access = UseUnalignedAccesses;
4114 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4115 }
4116
4117 void do_field(fieldDescriptor* fd) {
4118 oop mirror = fd->field_holder()->java_mirror();
4119 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4120 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4121 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4122 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4123 if (fd->name() == vmSymbols::address_size_name()) {
4124 mirror->int_field_put(fd->offset(), _address_size);
4125 } else if (fd->name() == vmSymbols::page_size_name()) {
4126 mirror->int_field_put(fd->offset(), _page_size);
4127 } else if (fd->name() == vmSymbols::big_endian_name()) {
4128 mirror->bool_field_put(fd->offset(), _big_endian);
4129 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4130 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4131 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4132 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4133 } else {
4134 assert(false, "unexpected UnsafeConstants field");
4135 }
4136 }
4137 };
4138
4139 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4140 UnsafeConstantsFixup fixup;
4141 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4142 }
4143
4144 int java_lang_Class::_klass_offset;
4145 int java_lang_Class::_array_klass_offset;
4146 int java_lang_Class::_oop_size_offset;
4147 int java_lang_Class::_static_oop_field_count_offset;
4148 int java_lang_Class::_class_loader_offset;
4149 int java_lang_Class::_module_offset;
4150 int java_lang_Class::_protection_domain_offset;
4151 int java_lang_Class::_component_mirror_offset;
4152 int java_lang_Class::_init_lock_offset;
4153 int java_lang_Class::_signers_offset;
4154 int java_lang_Class::_name_offset;
4155 int java_lang_Class::_source_file_offset;
4156 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4157 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4158 int java_lang_Throwable::backtrace_offset;
4159 int java_lang_Throwable::detailMessage_offset;
4160 int java_lang_Throwable::stackTrace_offset;
4161 int java_lang_Throwable::depth_offset;
4162 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4163 int java_lang_reflect_AccessibleObject::override_offset;
4164 int java_lang_reflect_Method::clazz_offset;
4165 int java_lang_reflect_Method::name_offset;
4166 int java_lang_reflect_Method::returnType_offset;
4167 int java_lang_reflect_Method::parameterTypes_offset;
4168 int java_lang_reflect_Method::exceptionTypes_offset;
4169 int java_lang_reflect_Method::slot_offset;
4170 int java_lang_reflect_Method::modifiers_offset;
4171 int java_lang_reflect_Method::signature_offset;
4172 int java_lang_reflect_Method::annotations_offset;
4173 int java_lang_reflect_Method::parameter_annotations_offset;
4174 int java_lang_reflect_Method::annotation_default_offset;
4175 int java_lang_reflect_Constructor::clazz_offset;
4176 int java_lang_reflect_Constructor::parameterTypes_offset;
4177 int java_lang_reflect_Constructor::exceptionTypes_offset;
4178 int java_lang_reflect_Constructor::slot_offset;
4179 int java_lang_reflect_Constructor::modifiers_offset;
4180 int java_lang_reflect_Constructor::signature_offset;
4181 int java_lang_reflect_Constructor::annotations_offset;
4182 int java_lang_reflect_Constructor::parameter_annotations_offset;
4183 int java_lang_reflect_Field::clazz_offset;
4184 int java_lang_reflect_Field::name_offset;
4185 int java_lang_reflect_Field::type_offset;
4186 int java_lang_reflect_Field::slot_offset;
4187 int java_lang_reflect_Field::modifiers_offset;
4188 int java_lang_reflect_Field::signature_offset;
4189 int java_lang_reflect_Field::annotations_offset;
4190 int java_lang_reflect_Parameter::name_offset;
4191 int java_lang_reflect_Parameter::modifiers_offset;
4192 int java_lang_reflect_Parameter::index_offset;
4193 int java_lang_reflect_Parameter::executable_offset;
4194 int java_lang_boxing_object::value_offset;
4195 int java_lang_boxing_object::long_value_offset;
4196 int java_lang_ref_Reference::referent_offset;
4197 int java_lang_ref_Reference::queue_offset;
4198 int java_lang_ref_Reference::next_offset;
4199 int java_lang_ref_Reference::discovered_offset;
4200 int java_lang_ref_SoftReference::timestamp_offset;
4201 int java_lang_ref_SoftReference::static_clock_offset;
4202 int java_lang_ClassLoader::parent_offset;
4203 int java_lang_System::static_in_offset;
4204 int java_lang_System::static_out_offset;
4205 int java_lang_System::static_err_offset;
4206 int java_lang_System::static_security_offset;
4207 int java_lang_StackTraceElement::methodName_offset;
4208 int java_lang_StackTraceElement::fileName_offset;
4209 int java_lang_StackTraceElement::lineNumber_offset;
4210 int java_lang_StackTraceElement::moduleName_offset;
4211 int java_lang_StackTraceElement::moduleVersion_offset;
4212 int java_lang_StackTraceElement::classLoaderName_offset;
4213 int java_lang_StackTraceElement::declaringClass_offset;
4214 int java_lang_StackTraceElement::declaringClassObject_offset;
4215 int java_lang_StackFrameInfo::_memberName_offset;
4216 int java_lang_StackFrameInfo::_bci_offset;
4217 int java_lang_StackFrameInfo::_version_offset;
4218 int java_lang_LiveStackFrameInfo::_monitors_offset;
4219 int java_lang_LiveStackFrameInfo::_locals_offset;
4220 int java_lang_LiveStackFrameInfo::_operands_offset;
4221 int java_lang_LiveStackFrameInfo::_mode_offset;
4222 int java_lang_AssertionStatusDirectives::classes_offset;
4223 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4224 int java_lang_AssertionStatusDirectives::packages_offset;
4225 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4226 int java_lang_AssertionStatusDirectives::deflt_offset;
4227 int java_nio_Buffer::_limit_offset;
4228 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4229 int reflect_ConstantPool::_oop_offset;
4230 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4231 int java_lang_Integer_IntegerCache::_static_cache_offset;
4232 int java_lang_Long_LongCache::_static_cache_offset;
4233 int java_lang_Character_CharacterCache::_static_cache_offset;
4234 int java_lang_Short_ShortCache::_static_cache_offset;
4235 int java_lang_Byte_ByteCache::_static_cache_offset;
4236 int java_lang_Boolean::_static_TRUE_offset;
4237 int java_lang_Boolean::_static_FALSE_offset;
4238
4239
4240
4241 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4242 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4243 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4244 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4245 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4246 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4247 macro(methodName_offset, k, "methodName", string_signature, false); \
4248 macro(fileName_offset, k, "fileName", string_signature, false); \
4249 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4250
4251 // Support for java_lang_StackTraceElement
4252 void java_lang_StackTraceElement::compute_offsets() {
4253 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4254 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4255 }
4256
4257 #if INCLUDE_CDS
4258 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4259 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4260 }
4261 #endif
4262
4263 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4264 element->obj_field_put(fileName_offset, value);
4265 }
4266
4267 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4268 element->obj_field_put(declaringClass_offset, value);
4269 }
4270
4271 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4272 element->obj_field_put(methodName_offset, value);
4273 }
4274
4275 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4276 element->int_field_put(lineNumber_offset, value);
4277 }
4278
4279 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4280 element->obj_field_put(moduleName_offset, value);
4281 }
4282
4283 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4284 element->obj_field_put(moduleVersion_offset, value);
4285 }
4286
4287 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4288 element->obj_field_put(classLoaderName_offset, value);
4289 }
4290
4291 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4292 element->obj_field_put(declaringClassObject_offset, value);
4293 }
4294
4295 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4296 element->short_field_put(_version_offset, value);
4297 }
4298
4299 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4300 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4301 element->int_field_put(_bci_offset, value);
4302 }
4303
4304 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4305 element->obj_field_put(_monitors_offset, value);
4306 }
4307
4308 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4309 element->obj_field_put(_locals_offset, value);
4310 }
4311
4312 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4313 element->obj_field_put(_operands_offset, value);
4314 }
4315
4316 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4317 element->int_field_put(_mode_offset, value);
4318 }
4319
4320 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4321 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4322 macro(classes_offset, k, "classes", string_array_signature, false); \
4323 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4324 macro(packages_offset, k, "packages", string_array_signature, false); \
4325 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4326 macro(deflt_offset, k, "deflt", bool_signature, false)
4327
4328 void java_lang_AssertionStatusDirectives::compute_offsets() {
4329 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4330 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4331 }
4332
4333 #if INCLUDE_CDS
4334 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4335 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4336 }
4337 #endif
4338
4339 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4340 o->obj_field_put(classes_offset, val);
4341 }
4342
4343 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4344 o->obj_field_put(classEnabled_offset, val);
4345 }
4346
4347 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4348 o->obj_field_put(packages_offset, val);
4349 }
4350
4351 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4352 o->obj_field_put(packageEnabled_offset, val);
4353 }
4354
4355 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4356 o->bool_field_put(deflt_offset, val);
4357 }
4358
4359
4360 // Support for intrinsification of java.nio.Buffer.checkIndex
4361 int java_nio_Buffer::limit_offset() {
4362 return _limit_offset;
4363 }
4364
4365 #define BUFFER_FIELDS_DO(macro) \
4366 macro(_limit_offset, k, "limit", int_signature, false)
4367
4368 void java_nio_Buffer::compute_offsets() {
4369 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4370 assert(k != NULL, "must be loaded in 1.4+");
4371 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4372 }
4373
4374 #if INCLUDE_CDS
4375 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4376 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4377 }
4378 #endif
4379
4380 #define AOS_FIELDS_DO(macro) \
4381 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4382
4383 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4384 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4385 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4386 }
4387
4388 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4389 assert(_owner_offset != 0, "Must be initialized");
4390 return obj->obj_field(_owner_offset);
4391 }
4392
4393 #if INCLUDE_CDS
4394 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4395 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4396 }
4397 #endif
4398
4399 #define INTEGER_CACHE_FIELDS_DO(macro) \
4400 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4401
4402 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4403 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4404 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4405 }
4406
4407 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4408 oop base = ik->static_field_base_raw();
4409 return objArrayOop(base->obj_field(_static_cache_offset));
4410 }
4411
4412 Symbol* java_lang_Integer_IntegerCache::symbol() {
4413 return vmSymbols::java_lang_Integer_IntegerCache();
4414 }
4415
4416 #if INCLUDE_CDS
4417 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4418 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4419 }
4420 #endif
4421 #undef INTEGER_CACHE_FIELDS_DO
4422
4423 jint java_lang_Integer::value(oop obj) {
4424 jvalue v;
4425 java_lang_boxing_object::get_value(obj, &v);
4426 return v.i;
4427 }
4428
4429 #define LONG_CACHE_FIELDS_DO(macro) \
4430 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4431
4432 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4433 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4434 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4435 }
4436
4437 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4438 oop base = ik->static_field_base_raw();
4439 return objArrayOop(base->obj_field(_static_cache_offset));
4440 }
4441
4442 Symbol* java_lang_Long_LongCache::symbol() {
4443 return vmSymbols::java_lang_Long_LongCache();
4444 }
4445
4446 #if INCLUDE_CDS
4447 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4448 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4449 }
4450 #endif
4451 #undef LONG_CACHE_FIELDS_DO
4452
4453 jlong java_lang_Long::value(oop obj) {
4454 jvalue v;
4455 java_lang_boxing_object::get_value(obj, &v);
4456 return v.j;
4457 }
4458
4459 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4460 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4461
4462 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4463 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4464 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4465 }
4466
4467 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4468 oop base = ik->static_field_base_raw();
4469 return objArrayOop(base->obj_field(_static_cache_offset));
4470 }
4471
4472 Symbol* java_lang_Character_CharacterCache::symbol() {
4473 return vmSymbols::java_lang_Character_CharacterCache();
4474 }
4475
4476 #if INCLUDE_CDS
4477 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4478 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4479 }
4480 #endif
4481 #undef CHARACTER_CACHE_FIELDS_DO
4482
4483 jchar java_lang_Character::value(oop obj) {
4484 jvalue v;
4485 java_lang_boxing_object::get_value(obj, &v);
4486 return v.c;
4487 }
4488
4489 #define SHORT_CACHE_FIELDS_DO(macro) \
4490 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4491
4492 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4493 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4494 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4495 }
4496
4497 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4498 oop base = ik->static_field_base_raw();
4499 return objArrayOop(base->obj_field(_static_cache_offset));
4500 }
4501
4502 Symbol* java_lang_Short_ShortCache::symbol() {
4503 return vmSymbols::java_lang_Short_ShortCache();
4504 }
4505
4506 #if INCLUDE_CDS
4507 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4508 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4509 }
4510 #endif
4511 #undef SHORT_CACHE_FIELDS_DO
4512
4513 jshort java_lang_Short::value(oop obj) {
4514 jvalue v;
4515 java_lang_boxing_object::get_value(obj, &v);
4516 return v.s;
4517 }
4518
4519 #define BYTE_CACHE_FIELDS_DO(macro) \
4520 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4521
4522 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4523 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4524 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4525 }
4526
4527 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4528 oop base = ik->static_field_base_raw();
4529 return objArrayOop(base->obj_field(_static_cache_offset));
4530 }
4531
4532 Symbol* java_lang_Byte_ByteCache::symbol() {
4533 return vmSymbols::java_lang_Byte_ByteCache();
4534 }
4535
4536 #if INCLUDE_CDS
4537 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4538 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4539 }
4540 #endif
4541 #undef BYTE_CACHE_FIELDS_DO
4542
4543 jbyte java_lang_Byte::value(oop obj) {
4544 jvalue v;
4545 java_lang_boxing_object::get_value(obj, &v);
4546 return v.b;
4547 }
4548 #define BOOLEAN_FIELDS_DO(macro) \
4549 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4550 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4551
4552
4553 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4554 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4555 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4556 }
4557
4558 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4559 oop base = ik->static_field_base_raw();
4560 return base->obj_field(_static_TRUE_offset);
4561 }
4562
4563 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4564 oop base = ik->static_field_base_raw();
4565 return base->obj_field(_static_FALSE_offset);
4566 }
4567
4568 Symbol* java_lang_Boolean::symbol() {
4569 return vmSymbols::java_lang_Boolean();
4570 }
4571
4572 #if INCLUDE_CDS
4573 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4574 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4575 }
4576 #endif
4577 #undef BOOLEAN_CACHE_FIELDS_DO
4578
4579 jboolean java_lang_Boolean::value(oop obj) {
4580 jvalue v;
4581 java_lang_boxing_object::get_value(obj, &v);
4582 return v.z;
4583 }
4584
4585 static int member_offset(int hardcoded_offset) {
4586 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4587 }
4588
4589 // Compute hard-coded offsets
4590 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4591 // are not available to determine the offset_of_static_fields.
4592 void JavaClasses::compute_hard_coded_offsets() {
4593
4594 // java_lang_boxing_object
4595 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4596 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4597
4598 // java_lang_ref_Reference
4599 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4600 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4601 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4602 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4603 }
4604
4605 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4606
4607 // Compute non-hard-coded field offsets of all the classes in this file
4608 void JavaClasses::compute_offsets() {
4609 if (UseSharedSpaces) {
4610 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4611 JvmtiExport::has_early_class_hook_env()),
4612 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4613 // None of the classes used by the rest of this function can be replaced by
4614 // JMVTI ClassFileLoadHook.
4615 // We are safe to use the archived offsets, which have already been restored
4616 // by JavaClasses::serialize_offsets, without computing the offsets again.
4617 return;
4618 }
4619
4620 // We have already called the compute_offsets() of the
4621 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4622 // earlier inside SystemDictionary::resolve_well_known_classes()
4623 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4624 }
4625
4626 #if INCLUDE_CDS
4627 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4628
4629 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4630 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4631 }
4632 #endif
4633
4634
4635 #ifndef PRODUCT
4636
4637 // These functions exist to assert the validity of hard-coded field offsets to guard
4638 // against changes in the class files
4639
4640 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4641 EXCEPTION_MARK;
4642 fieldDescriptor fd;
4643 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4644 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4645 InstanceKlass* ik = InstanceKlass::cast(k);
4646 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4647 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4648 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4649 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4650 return false;
4651 }
4652 if (fd.is_static()) {
4653 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4654 return false;
4655 }
4656 if (fd.offset() == hardcoded_offset ) {
4657 return true;
4658 } else {
4659 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4660 klass_name, field_name, hardcoded_offset, fd.offset());
4661 return false;
4662 }
4663 }
4664
4665 // Check the hard-coded field offsets of all the classes in this file
4666
4667 void JavaClasses::check_offsets() {
4668 bool valid = true;
4669
4670 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4671 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4672
4673 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4674 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4675
4676 // Boxed primitive objects (java_lang_boxing_object)
4677
4678 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4679 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4680 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4681 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4682 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4683 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4684 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4685 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4686
4687 // java.lang.ref.Reference
4688
4689 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4690 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4691 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4692 // Fake field
4693 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4694
4695 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4696 }
4697
4698 #endif // PRODUCT
4699
4700 int InjectedField::compute_offset() {
4701 InstanceKlass* ik = InstanceKlass::cast(klass());
4702 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4703 if (!may_be_java && !fs.access_flags().is_internal()) {
4704 // Only look at injected fields
4705 continue;
4706 }
4707 if (fs.name() == name() && fs.signature() == signature()) {
4708 return fs.offset();
4709 }
4710 }
4711 ResourceMark rm;
4712 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)" : "");
4713 #ifndef PRODUCT
4714 ik->print();
4715 tty->print_cr("all fields:");
4716 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4717 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4718 }
4719 #endif //PRODUCT
4720 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4721 return -1;
4722 }
4723
4724 void javaClasses_init() {
4725 JavaClasses::compute_offsets();
4726 JavaClasses::check_offsets();
4727 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4728 }