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/init.hpp"
60 #include "runtime/interfaceSupport.inline.hpp"
61 #include "runtime/java.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/jniHandles.inline.hpp"
64 #include "runtime/safepoint.hpp"
65 #include "runtime/safepointVerifiers.hpp"
66 #include "runtime/thread.inline.hpp"
67 #include "runtime/vframe.inline.hpp"
68 #include "runtime/vm_version.hpp"
69 #include "utilities/align.hpp"
70 #include "utilities/preserveException.hpp"
71 #include "utilities/utf8.hpp"
72 #if INCLUDE_JVMCI
73 #include "jvmci/jvmciJavaClasses.hpp"
74 #endif
75
76 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
77 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
78
79 #if INCLUDE_CDS
80 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
81 f->do_u4((u4*)&_##name##_offset);
82 #endif
83
84 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
85 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
86
87 InjectedField JavaClasses::_injected_fields[] = {
88 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
89 };
90
91 // Register native methods of Object
92 void java_lang_Object::register_natives(TRAPS) {
93 InstanceKlass* obj = SystemDictionary::Object_klass();
94 Method::register_native(obj, vmSymbols::hashCode_name(),
95 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
96 Method::register_native(obj, vmSymbols::wait_name(),
97 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
98 Method::register_native(obj, vmSymbols::notify_name(),
99 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
100 Method::register_native(obj, vmSymbols::notifyAll_name(),
101 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
102 Method::register_native(obj, vmSymbols::clone_name(),
103 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
104 }
105
106 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
107 return _injected_fields[id].compute_offset();
108 }
109
110 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
111 *field_count = 0;
112
113 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
114 if (sid == vmSymbols::NO_SID) {
115 // Only well known classes can inject fields
116 return NULL;
117 }
118
119 int count = 0;
120 int start = -1;
121
122 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
123 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
124 count++; \
125 if (start == -1) start = klass##_##name##_enum; \
126 }
127 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
128 #undef LOOKUP_INJECTED_FIELD
129
130 if (start != -1) {
131 *field_count = count;
132 return _injected_fields + start;
133 }
134 return NULL;
135 }
136
137
138 // Helpful routine for computing field offsets at run time rather than hardcoding them
139 // Finds local fields only, including static fields. Static field offsets are from the
140 // beginning of the mirror.
141 static void compute_offset(int &dest_offset,
142 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
143 bool is_static = false) {
144 fieldDescriptor fd;
145 if (ik == NULL) {
146 ResourceMark rm;
147 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
148 vm_exit_during_initialization("Invalid layout of well-known class");
149 }
150
151 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
152 ResourceMark rm;
153 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
154 name_symbol->as_C_string(), signature_symbol->as_C_string());
155 #ifndef PRODUCT
156 // Prints all fields and offsets
157 Log(class) lt;
158 LogStream ls(lt.error());
159 ik->print_on(&ls);
160 #endif //PRODUCT
161 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
162 }
163 dest_offset = fd.offset();
164 }
165
166 // Overloading to pass name as a string.
167 static void compute_offset(int& dest_offset, InstanceKlass* ik,
168 const char* name_string, Symbol* signature_symbol,
169 bool is_static = false) {
170 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
171 if (name == NULL) {
172 ResourceMark rm;
173 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
174 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
175 }
176 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
177 }
178
179 int java_lang_String::value_offset = 0;
180 int java_lang_String::hash_offset = 0;
181 int java_lang_String::hashIsZero_offset = 0;
182 int java_lang_String::coder_offset = 0;
183
184 bool java_lang_String::initialized = false;
185
186 bool java_lang_String::is_instance(oop obj) {
187 return is_instance_inlined(obj);
188 }
189
190 #if INCLUDE_CDS
191 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
192 f->do_u4((u4*)&offset)
193 #endif
194
195 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
196 compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
197
198 #define STRING_FIELDS_DO(macro) \
199 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
200 macro(hash_offset, k, "hash", int_signature, false); \
201 macro(hashIsZero_offset, k, "hashIsZero", bool_signature, false); \
202 macro(coder_offset, k, "coder", byte_signature, false);
203
204 void java_lang_String::compute_offsets() {
205 if (initialized) {
206 return;
207 }
208
209 InstanceKlass* k = SystemDictionary::String_klass();
210 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
211
212 initialized = true;
213 }
214
215 #if INCLUDE_CDS
216 void java_lang_String::serialize_offsets(SerializeClosure* f) {
217 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
218 f->do_bool(&initialized);
219 }
220 #endif
221
222 class CompactStringsFixup : public FieldClosure {
223 private:
224 bool _value;
225
226 public:
227 CompactStringsFixup(bool value) : _value(value) {}
228
229 void do_field(fieldDescriptor* fd) {
230 if (fd->name() == vmSymbols::compact_strings_name()) {
231 oop mirror = fd->field_holder()->java_mirror();
232 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
233 assert(mirror != NULL, "String must have mirror already");
234 mirror->bool_field_put(fd->offset(), _value);
235 }
236 }
237 };
238
239 void java_lang_String::set_compact_strings(bool value) {
240 CompactStringsFixup fix(value);
241 SystemDictionary::String_klass()->do_local_static_fields(&fix);
242 }
243
244 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
245 assert(initialized, "Must be initialized");
246 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
247
248 // Create the String object first, so there's a chance that the String
249 // and the char array it points to end up in the same cache line.
250 oop obj;
251 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
252
253 // Create the char array. The String object must be handlized here
254 // because GC can happen as a result of the allocation attempt.
255 Handle h_obj(THREAD, obj);
256 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
257 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
258
259 // Point the String at the char array
260 obj = h_obj();
261 set_value(obj, buffer);
262 // No need to zero the offset, allocation zero'ed the entire String object
263 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
264 return h_obj;
265 }
266
267 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
268 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
269 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
270 typeArrayOop buffer = value(h_obj());
271 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
272 if (is_latin1) {
273 for (int index = 0; index < length; index++) {
274 buffer->byte_at_put(index, (jbyte)unicode[index]);
275 }
276 } else {
277 for (int index = 0; index < length; index++) {
278 buffer->char_at_put(index, unicode[index]);
279 }
280 }
281
282 #ifdef ASSERT
283 {
284 ResourceMark rm;
285 char* expected = UNICODE::as_utf8(unicode, length);
286 char* actual = as_utf8_string(h_obj());
287 if (strcmp(expected, actual) != 0) {
288 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
289 ShouldNotReachHere();
290 }
291 }
292 #endif
293
294 return h_obj;
295 }
296
297 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
298 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
299 return h_obj();
300 }
301
302 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
303 if (utf8_str == NULL) {
304 return Handle();
305 }
306 bool has_multibyte, is_latin1;
307 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
308 if (!CompactStrings) {
309 has_multibyte = true;
310 is_latin1 = false;
311 }
312
313 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
314 if (length > 0) {
315 if (!has_multibyte) {
316 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
317 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
318 } else if (is_latin1) {
319 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
320 } else {
321 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
322 }
323 }
324
325 #ifdef ASSERT
326 // This check is too strict because the input string is not necessarily valid UTF8.
327 // For example, it may be created with arbitrary content via jni_NewStringUTF.
328 /*
329 {
330 ResourceMark rm;
331 const char* expected = utf8_str;
332 char* actual = as_utf8_string(h_obj());
333 if (strcmp(expected, actual) != 0) {
334 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
335 ShouldNotReachHere();
336 }
337 }
338 */
339 #endif
340
341 return h_obj;
342 }
343
344 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
345 Handle h_obj = create_from_str(utf8_str, CHECK_0);
346 return h_obj();
347 }
348
349 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
350 const char* utf8_str = (char*)symbol->bytes();
351 int utf8_len = symbol->utf8_length();
352
353 bool has_multibyte, is_latin1;
354 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
355 if (!CompactStrings) {
356 has_multibyte = true;
357 is_latin1 = false;
358 }
359
360 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
361 if (length > 0) {
362 if (!has_multibyte) {
363 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
364 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
365 } else if (is_latin1) {
366 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
367 } else {
368 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
369 }
370 }
371
372 #ifdef ASSERT
373 {
374 ResourceMark rm;
375 const char* expected = symbol->as_utf8();
376 char* actual = as_utf8_string(h_obj());
377 if (strncmp(expected, actual, utf8_len) != 0) {
378 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
379 ShouldNotReachHere();
380 }
381 }
382 #endif
383
384 return h_obj;
385 }
386
387 // Converts a C string to a Java String based on current encoding
388 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
389 assert(str != NULL, "bad arguments");
390
391 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
392 static to_java_string_fn_t _to_java_string_fn = NULL;
393
394 if (_to_java_string_fn == NULL) {
395 void *lib_handle = os::native_java_library();
396 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
397 #if defined(_WIN32) && !defined(_WIN64)
398 if (_to_java_string_fn == NULL) {
399 // On 32 bit Windows, also try __stdcall decorated name
400 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
401 }
402 #endif
403 if (_to_java_string_fn == NULL) {
404 fatal("JNU_NewStringPlatform missing");
405 }
406 }
407
408 jstring js = NULL;
409 {
410 assert(THREAD->is_Java_thread(), "must be java thread");
411 JavaThread* thread = (JavaThread*)THREAD;
412 HandleMark hm(thread);
413 ThreadToNativeFromVM ttn(thread);
414 js = (_to_java_string_fn)(thread->jni_environment(), str);
415 }
416
417 Handle native_platform_string(THREAD, JNIHandles::resolve(js));
418 JNIHandles::destroy_local(js); // destroy local JNIHandle.
419 return native_platform_string;
420 }
421
422 // Converts a Java String to a native C string that can be used for
423 // native OS calls.
424 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
425 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
426 static to_platform_string_fn_t _to_platform_string_fn = NULL;
427
428 if (_to_platform_string_fn == NULL) {
429 void *lib_handle = os::native_java_library();
430 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
431 if (_to_platform_string_fn == NULL) {
432 fatal("GetStringPlatformChars missing");
433 }
434 }
435
436 char *native_platform_string;
437 { JavaThread* thread = (JavaThread*)THREAD;
438 assert(thread->is_Java_thread(), "must be java thread");
439 JNIEnv *env = thread->jni_environment();
440 jstring js = (jstring) JNIHandles::make_local(env, java_string());
441 bool is_copy;
442 HandleMark hm(thread);
443 ThreadToNativeFromVM ttn(thread);
444 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
445 assert(is_copy == JNI_TRUE, "is_copy value changed");
446 JNIHandles::destroy_local(js);
447 }
448 return native_platform_string;
449 }
450
451 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
452 oop obj = java_string();
453 // Typical usage is to convert all '/' to '.' in string.
454 typeArrayOop value = java_lang_String::value(obj);
455 int length = java_lang_String::length(obj, value);
456 bool is_latin1 = java_lang_String::is_latin1(obj);
457
458 // First check if any from_char exist
459 int index; // Declared outside, used later
460 for (index = 0; index < length; index++) {
461 jchar c = !is_latin1 ? value->char_at(index) :
462 ((jchar) value->byte_at(index)) & 0xff;
463 if (c == from_char) {
464 break;
465 }
466 }
467 if (index == length) {
468 // No from_char, so do not copy.
469 return java_string;
470 }
471
472 // Check if result string will be latin1
473 bool to_is_latin1 = false;
474
475 // Replacement char must be latin1
476 if (CompactStrings && UNICODE::is_latin1(to_char)) {
477 if (is_latin1) {
478 // Source string is latin1 as well
479 to_is_latin1 = true;
480 } else if (!UNICODE::is_latin1(from_char)) {
481 // We are replacing an UTF16 char. Scan string to
482 // check if result can be latin1 encoded.
483 to_is_latin1 = true;
484 for (index = 0; index < length; index++) {
485 jchar c = value->char_at(index);
486 if (c != from_char && !UNICODE::is_latin1(c)) {
487 to_is_latin1 = false;
488 break;
489 }
490 }
491 }
492 }
493
494 // Create new UNICODE (or byte) buffer. Must handlize value because GC
495 // may happen during String and char array creation.
496 typeArrayHandle h_value(THREAD, value);
497 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
498 typeArrayOop from_buffer = h_value();
499 typeArrayOop to_buffer = java_lang_String::value(string());
500
501 // Copy contents
502 for (index = 0; index < length; index++) {
503 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
504 ((jchar) from_buffer->byte_at(index)) & 0xff;
505 if (c == from_char) {
506 c = to_char;
507 }
508 if (!to_is_latin1) {
509 to_buffer->char_at_put(index, c);
510 } else {
511 to_buffer->byte_at_put(index, (jbyte) c);
512 }
513 }
514 return string;
515 }
516
517 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
518 typeArrayOop value = java_lang_String::value(java_string);
519 length = java_lang_String::length(java_string, value);
520 bool is_latin1 = java_lang_String::is_latin1(java_string);
521
522 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
523 if (result != NULL) {
524 if (!is_latin1) {
525 for (int index = 0; index < length; index++) {
526 result[index] = value->char_at(index);
527 }
528 } else {
529 for (int index = 0; index < length; index++) {
530 result[index] = ((jchar) value->byte_at(index)) & 0xff;
531 }
532 }
533 } else {
534 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
535 }
536 return result;
537 }
538
539 unsigned int java_lang_String::hash_code(oop java_string) {
540 // The hash and hashIsZero fields are subject to a benign data race,
541 // making it crucial to ensure that any observable result of the
542 // calculation in this method stays correct under any possible read of
543 // these fields. Necessary restrictions to allow this to be correct
544 // without explicit memory fences or similar concurrency primitives is
545 // that we can ever only write to one of these two fields for a given
546 // String instance, and that the computation is idempotent and derived
547 // from immutable state
548 assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
549 if (java_lang_String::hash_is_set(java_string)) {
550 return java_string->int_field(hash_offset);
551 }
552
553 typeArrayOop value = java_lang_String::value(java_string);
554 int length = java_lang_String::length(java_string, value);
555 bool is_latin1 = java_lang_String::is_latin1(java_string);
556
557 unsigned int hash = 0;
558 if (length > 0) {
559 if (is_latin1) {
560 hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
561 } else {
562 hash = java_lang_String::hash_code(value->char_at_addr(0), length);
563 }
564 }
565
566 if (hash != 0) {
567 java_string->int_field_put(hash_offset, hash);
568 } else {
569 java_string->bool_field_put(hashIsZero_offset, true);
570 }
571 return hash;
572 }
573
574 char* java_lang_String::as_quoted_ascii(oop java_string) {
575 typeArrayOop value = java_lang_String::value(java_string);
576 int length = java_lang_String::length(java_string, value);
577 bool is_latin1 = java_lang_String::is_latin1(java_string);
578
579 if (length == 0) return NULL;
580
581 char* result;
582 int result_length;
583 if (!is_latin1) {
584 jchar* base = value->char_at_addr(0);
585 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
586 result = NEW_RESOURCE_ARRAY(char, result_length);
587 UNICODE::as_quoted_ascii(base, length, result, result_length);
588 } else {
589 jbyte* base = value->byte_at_addr(0);
590 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
591 result = NEW_RESOURCE_ARRAY(char, result_length);
592 UNICODE::as_quoted_ascii(base, length, result, result_length);
593 }
594 assert(result_length >= length + 1, "must not be shorter");
595 assert(result_length == (int)strlen(result) + 1, "must match");
596 return result;
597 }
598
599 Symbol* java_lang_String::as_symbol(oop java_string) {
600 typeArrayOop value = java_lang_String::value(java_string);
601 int length = java_lang_String::length(java_string, value);
602 bool is_latin1 = java_lang_String::is_latin1(java_string);
603 if (!is_latin1) {
604 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
605 Symbol* sym = SymbolTable::new_symbol(base, length);
606 return sym;
607 } else {
608 ResourceMark rm;
609 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
610 const char* base = UNICODE::as_utf8(position, length);
611 Symbol* sym = SymbolTable::new_symbol(base, length);
612 return sym;
613 }
614 }
615
616 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
617 typeArrayOop value = java_lang_String::value(java_string);
618 int length = java_lang_String::length(java_string, value);
619 bool is_latin1 = java_lang_String::is_latin1(java_string);
620 if (!is_latin1) {
621 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
622 return SymbolTable::probe_unicode(base, length);
623 } else {
624 ResourceMark rm;
625 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
626 const char* base = UNICODE::as_utf8(position, length);
627 return SymbolTable::probe(base, length);
628 }
629 }
630
631 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
632 assert(value_equals(value, java_lang_String::value(java_string)),
633 "value must be same as java_lang_String::value(java_string)");
634 int length = java_lang_String::length(java_string, value);
635 if (length == 0) {
636 return 0;
637 }
638 if (!java_lang_String::is_latin1(java_string)) {
639 return UNICODE::utf8_length(value->char_at_addr(0), length);
640 } else {
641 return UNICODE::utf8_length(value->byte_at_addr(0), length);
642 }
643 }
644
645 int java_lang_String::utf8_length(oop java_string) {
646 typeArrayOop value = java_lang_String::value(java_string);
647 return utf8_length(java_string, value);
648 }
649
650 char* java_lang_String::as_utf8_string(oop java_string) {
651 typeArrayOop value = java_lang_String::value(java_string);
652 int length = java_lang_String::length(java_string, value);
653 bool is_latin1 = java_lang_String::is_latin1(java_string);
654 if (!is_latin1) {
655 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
656 return UNICODE::as_utf8(position, length);
657 } else {
658 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
659 return UNICODE::as_utf8(position, length);
660 }
661 }
662
663 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
664 assert(value_equals(value, java_lang_String::value(java_string)),
665 "value must be same as java_lang_String::value(java_string)");
666 int length = java_lang_String::length(java_string, value);
667 bool is_latin1 = java_lang_String::is_latin1(java_string);
668 if (!is_latin1) {
669 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
670 return UNICODE::as_utf8(position, length, buf, buflen);
671 } else {
672 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
673 return UNICODE::as_utf8(position, length, buf, buflen);
674 }
675 }
676
677 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
678 typeArrayOop value = java_lang_String::value(java_string);
679 return as_utf8_string(java_string, value, buf, buflen);
680 }
681
682 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
683 typeArrayOop value = java_lang_String::value(java_string);
684 bool is_latin1 = java_lang_String::is_latin1(java_string);
685 assert(start + len <= java_lang_String::length(java_string), "just checking");
686 if (!is_latin1) {
687 jchar* position = value->char_at_addr(start);
688 return UNICODE::as_utf8(position, len);
689 } else {
690 jbyte* position = value->byte_at_addr(start);
691 return UNICODE::as_utf8(position, len);
692 }
693 }
694
695 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
696 assert(value_equals(value, java_lang_String::value(java_string)),
697 "value must be same as java_lang_String::value(java_string)");
698 assert(start + len <= java_lang_String::length(java_string), "just checking");
699 bool is_latin1 = java_lang_String::is_latin1(java_string);
700 if (!is_latin1) {
701 jchar* position = value->char_at_addr(start);
702 return UNICODE::as_utf8(position, len, buf, buflen);
703 } else {
704 jbyte* position = value->byte_at_addr(start);
705 return UNICODE::as_utf8(position, len, buf, buflen);
706 }
707 }
708
709 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
710 assert(java_string->klass() == SystemDictionary::String_klass(),
711 "must be java_string");
712 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
713 int length = java_lang_String::length(java_string, value);
714 if (length != len) {
715 return false;
716 }
717 bool is_latin1 = java_lang_String::is_latin1(java_string);
718 if (!is_latin1) {
719 for (int i = 0; i < len; i++) {
720 if (value->char_at(i) != chars[i]) {
721 return false;
722 }
723 }
724 } else {
725 for (int i = 0; i < len; i++) {
726 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
727 return false;
728 }
729 }
730 }
731 return true;
732 }
733
734 bool java_lang_String::equals(oop str1, oop str2) {
735 assert(str1->klass() == SystemDictionary::String_klass(),
736 "must be java String");
737 assert(str2->klass() == SystemDictionary::String_klass(),
738 "must be java String");
739 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
740 bool is_latin1 = java_lang_String::is_latin1(str1);
741 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
742 bool is_latin2 = java_lang_String::is_latin1(str2);
743
744 if (is_latin1 != is_latin2) {
745 // Strings with different coders are never equal.
746 return false;
747 }
748 return value_equals(value1, value2);
749 }
750
751 void java_lang_String::print(oop java_string, outputStream* st) {
752 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
753 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
754
755 if (value == NULL) {
756 // This can happen if, e.g., printing a String
757 // object before its initializer has been called
758 st->print("NULL");
759 return;
760 }
761
762 int length = java_lang_String::length(java_string, value);
763 bool is_latin1 = java_lang_String::is_latin1(java_string);
764
765 st->print("\"");
766 for (int index = 0; index < length; index++) {
767 st->print("%c", (!is_latin1) ? value->char_at(index) :
768 ((jchar) value->byte_at(index)) & 0xff );
769 }
770 st->print("\"");
771 }
772
773
774 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
775 assert(mirror.not_null() && fd->is_static(), "just checking");
776 if (fd->has_initial_value()) {
777 BasicType t = fd->field_type();
778 switch (t) {
779 case T_BYTE:
780 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
781 break;
782 case T_BOOLEAN:
783 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
784 break;
785 case T_CHAR:
786 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
787 break;
788 case T_SHORT:
789 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
790 break;
791 case T_INT:
792 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
793 break;
794 case T_FLOAT:
795 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
796 break;
797 case T_DOUBLE:
798 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
799 break;
800 case T_LONG:
801 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
802 break;
803 case T_OBJECT:
804 {
805 assert(fd->signature() == vmSymbols::string_signature(),
806 "just checking");
807 if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
808 // Archive the String field and update the pointer.
809 oop s = mirror()->obj_field(fd->offset());
810 oop archived_s = StringTable::create_archived_string(s, CHECK);
811 mirror()->obj_field_put(fd->offset(), archived_s);
812 } else {
813 oop string = fd->string_initial_value(CHECK);
814 mirror()->obj_field_put(fd->offset(), string);
815 }
816 }
817 break;
818 default:
819 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
820 "Illegal ConstantValue attribute in class file");
821 }
822 }
823 }
824
825
826 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
827 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
828
829 // If the offset was read from the shared archive, it was fixed up already
830 if (!k->is_shared()) {
831 if (k->is_instance_klass()) {
832 // During bootstrap, java.lang.Class wasn't loaded so static field
833 // offsets were computed without the size added it. Go back and
834 // update all the static field offsets to included the size.
835 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
836 if (fs.access_flags().is_static()) {
837 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
838 fs.set_offset(real_offset);
839 }
840 }
841 }
842 }
843
844 if (k->is_shared() && k->has_raw_archived_mirror()) {
845 if (HeapShared::open_archive_heap_region_mapped()) {
846 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
847 assert(present, "Missing archived mirror for %s", k->external_name());
848 return;
849 } else {
850 k->set_java_mirror_handle(NULL);
851 k->clear_has_raw_archived_mirror();
852 }
853 }
854 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
855 }
856
857 void java_lang_Class::initialize_mirror_fields(Klass* k,
858 Handle mirror,
859 Handle protection_domain,
860 TRAPS) {
861 // Allocate a simple java object for a lock.
862 // This needs to be a java object because during class initialization
863 // it can be held across a java call.
864 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
865 set_init_lock(mirror(), r);
866
867 // Set protection domain also
868 set_protection_domain(mirror(), protection_domain());
869
870 // Initialize static fields
871 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
872 }
873
874 // Set the java.lang.Module module field in the java_lang_Class mirror
875 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
876 if (module.is_null()) {
877 // During startup, the module may be NULL only if java.base has not been defined yet.
878 // Put the class on the fixup_module_list to patch later when the java.lang.Module
879 // for java.base is known. But note that since we captured the NULL module another
880 // thread may have completed that initialization.
881
882 bool javabase_was_defined = false;
883 {
884 MutexLocker m1(Module_lock, THREAD);
885 // Keep list of classes needing java.base module fixup
886 if (!ModuleEntryTable::javabase_defined()) {
887 assert(k->java_mirror() != NULL, "Class's mirror is null");
888 k->class_loader_data()->inc_keep_alive();
889 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
890 fixup_module_field_list()->push(k);
891 } else {
892 javabase_was_defined = true;
893 }
894 }
895
896 // If java.base was already defined then patch this particular class with java.base.
897 if (javabase_was_defined) {
898 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
899 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
900 "Setting class module field, " JAVA_BASE_NAME " should be defined");
901 Handle javabase_handle(THREAD, javabase_entry->module());
902 set_module(mirror(), javabase_handle());
903 }
904 } else {
905 assert(Universe::is_module_initialized() ||
906 (ModuleEntryTable::javabase_defined() &&
907 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
908 "Incorrect java.lang.Module specification while creating mirror");
909 set_module(mirror(), module());
910 }
911 }
912
913 // Statically allocate fixup lists because they always get created.
914 void java_lang_Class::allocate_fixup_lists() {
915 GrowableArray<Klass*>* mirror_list =
916 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
917 set_fixup_mirror_list(mirror_list);
918
919 GrowableArray<Klass*>* module_list =
920 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
921 set_fixup_module_field_list(module_list);
922 }
923
924 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
925 Handle module, Handle protection_domain, TRAPS) {
926 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
927 assert(k->java_mirror() == NULL, "should only assign mirror once");
928
929 // Use this moment of initialization to cache modifier_flags also,
930 // to support Class.getModifiers(). Instance classes recalculate
931 // the cached flags after the class file is parsed, but before the
932 // class is put into the system dictionary.
933 int computed_modifiers = k->compute_modifier_flags(CHECK);
934 k->set_modifier_flags(computed_modifiers);
935 // Class_klass has to be loaded because it is used to allocate
936 // the mirror.
937 if (SystemDictionary::Class_klass_loaded()) {
938 // Allocate mirror (java.lang.Class instance)
939 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
940 Handle mirror(THREAD, mirror_oop);
941 Handle comp_mirror;
942
943 // Setup indirection from mirror->klass
944 java_lang_Class::set_klass(mirror(), k);
945
946 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
947 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
948
949 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
950
951 // It might also have a component mirror. This mirror must already exist.
952 if (k->is_array_klass()) {
953 if (k->is_typeArray_klass()) {
954 BasicType type = TypeArrayKlass::cast(k)->element_type();
955 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
956 } else {
957 assert(k->is_objArray_klass(), "Must be");
958 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
959 assert(element_klass != NULL, "Must have an element klass");
960 comp_mirror = Handle(THREAD, element_klass->java_mirror());
961 }
962 assert(comp_mirror() != NULL, "must have a mirror");
963
964 // Two-way link between the array klass and its component mirror:
965 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
966 set_component_mirror(mirror(), comp_mirror());
967 // See below for ordering dependencies between field array_klass in component mirror
968 // and java_mirror in this klass.
969 } else {
970 assert(k->is_instance_klass(), "Must be");
971
972 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
973 if (HAS_PENDING_EXCEPTION) {
974 // If any of the fields throws an exception like OOM remove the klass field
975 // from the mirror so GC doesn't follow it after the klass has been deallocated.
976 // This mirror looks like a primitive type, which logically it is because it
977 // it represents no class.
978 java_lang_Class::set_klass(mirror(), NULL);
979 return;
980 }
981 }
982
983 // set the classLoader field in the java_lang_Class instance
984 assert(class_loader() == k->class_loader(), "should be same");
985 set_class_loader(mirror(), class_loader());
986
987 // Setup indirection from klass->mirror
988 // after any exceptions can happen during allocations.
989 k->set_java_mirror(mirror);
990
991 // Set the module field in the java_lang_Class instance. This must be done
992 // after the mirror is set.
993 set_mirror_module_field(k, mirror, module, THREAD);
994
995 if (comp_mirror() != NULL) {
996 // Set after k->java_mirror() is published, because compiled code running
997 // concurrently doesn't expect a k to have a null java_mirror.
998 release_set_array_klass(comp_mirror(), k);
999 }
1000 } else {
1001 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1002 fixup_mirror_list()->push(k);
1003 }
1004 }
1005
1006 #if INCLUDE_CDS_JAVA_HEAP
1007 // Clears mirror fields. Static final fields with initial values are reloaded
1008 // from constant pool. The object identity hash is in the object header and is
1009 // not affected.
1010 class ResetMirrorField: public FieldClosure {
1011 private:
1012 Handle _m;
1013
1014 public:
1015 ResetMirrorField(Handle mirror) : _m(mirror) {}
1016
1017 void do_field(fieldDescriptor* fd) {
1018 assert(DumpSharedSpaces, "dump time only");
1019 assert(_m.not_null(), "Mirror cannot be NULL");
1020
1021 if (fd->is_static() && fd->has_initial_value()) {
1022 initialize_static_field(fd, _m, Thread::current());
1023 return;
1024 }
1025
1026 BasicType ft = fd->field_type();
1027 switch (ft) {
1028 case T_BYTE:
1029 _m()->byte_field_put(fd->offset(), 0);
1030 break;
1031 case T_CHAR:
1032 _m()->char_field_put(fd->offset(), 0);
1033 break;
1034 case T_DOUBLE:
1035 _m()->double_field_put(fd->offset(), 0);
1036 break;
1037 case T_FLOAT:
1038 _m()->float_field_put(fd->offset(), 0);
1039 break;
1040 case T_INT:
1041 _m()->int_field_put(fd->offset(), 0);
1042 break;
1043 case T_LONG:
1044 _m()->long_field_put(fd->offset(), 0);
1045 break;
1046 case T_SHORT:
1047 _m()->short_field_put(fd->offset(), 0);
1048 break;
1049 case T_BOOLEAN:
1050 _m()->bool_field_put(fd->offset(), false);
1051 break;
1052 case T_ARRAY:
1053 case T_OBJECT: {
1054 // It might be useful to cache the String field, but
1055 // for now just clear out any reference field
1056 oop o = _m()->obj_field(fd->offset());
1057 _m()->obj_field_put(fd->offset(), NULL);
1058 break;
1059 }
1060 default:
1061 ShouldNotReachHere();
1062 break;
1063 }
1064 }
1065 };
1066
1067 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1068 assert(HeapShared::is_heap_object_archiving_allowed(),
1069 "HeapShared::is_heap_object_archiving_allowed() must be true");
1070
1071 for (int t = 0; t <= T_VOID; t++) {
1072 oop m = Universe::_mirrors[t];
1073 if (m != NULL) {
1074 // Update the field at _array_klass_offset to point to the relocated array klass.
1075 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1076 assert(archived_m != NULL, "sanity");
1077 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1078 assert(ak != NULL || t == T_VOID, "should not be NULL");
1079 if (ak != NULL) {
1080 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1081 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1082 }
1083
1084 // Clear the fields. Just to be safe
1085 Klass *k = m->klass();
1086 Handle archived_mirror_h(THREAD, archived_m);
1087 ResetMirrorField reset(archived_mirror_h);
1088 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1089
1090 log_trace(cds, heap, mirror)(
1091 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1092 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1093
1094 Universe::_mirrors[t] = archived_m;
1095 }
1096 }
1097
1098 assert(Universe::_mirrors[T_INT] != NULL &&
1099 Universe::_mirrors[T_FLOAT] != NULL &&
1100 Universe::_mirrors[T_DOUBLE] != NULL &&
1101 Universe::_mirrors[T_BYTE] != NULL &&
1102 Universe::_mirrors[T_BOOLEAN] != NULL &&
1103 Universe::_mirrors[T_CHAR] != NULL &&
1104 Universe::_mirrors[T_LONG] != NULL &&
1105 Universe::_mirrors[T_SHORT] != NULL &&
1106 Universe::_mirrors[T_VOID] != NULL, "sanity");
1107
1108 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1109 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1110 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1111 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1112 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1113 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1114 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1115 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1116 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1117 }
1118
1119 //
1120 // After the mirror object is successfully archived, the archived
1121 // klass is set with _has_archived_raw_mirror flag.
1122 //
1123 // The _has_archived_raw_mirror flag is cleared at runtime when the
1124 // archived mirror is restored. If archived java heap data cannot
1125 // be used at runtime, new mirror object is created for the shared
1126 // class. The _has_archived_raw_mirror is cleared also during the process.
1127 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1128 assert(HeapShared::is_heap_object_archiving_allowed(),
1129 "HeapShared::is_heap_object_archiving_allowed() must be true");
1130
1131 // Mirror is already archived
1132 if (k->has_raw_archived_mirror()) {
1133 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1134 return k->archived_java_mirror_raw();
1135 }
1136
1137 // No mirror
1138 oop mirror = k->java_mirror();
1139 if (mirror == NULL) {
1140 return NULL;
1141 }
1142
1143 if (k->is_instance_klass()) {
1144 InstanceKlass *ik = InstanceKlass::cast(k);
1145 assert(ik->signers() == NULL, "class with signer should have been excluded");
1146
1147 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1148 ik->is_shared_app_class())) {
1149 // Archiving mirror for classes from non-builtin loaders is not
1150 // supported. Clear the _java_mirror within the archived class.
1151 k->set_java_mirror_handle(NULL);
1152 return NULL;
1153 }
1154 }
1155
1156 // Now start archiving the mirror object
1157 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1158 if (archived_mirror == NULL) {
1159 return NULL;
1160 }
1161
1162 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1163 if (archived_mirror == NULL) {
1164 return NULL;
1165 }
1166
1167 k->set_archived_java_mirror_raw(archived_mirror);
1168
1169 k->set_has_raw_archived_mirror();
1170
1171 ResourceMark rm;
1172 log_trace(cds, heap, mirror)(
1173 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1174 k->external_name(), p2i(mirror), p2i(archived_mirror));
1175
1176 return archived_mirror;
1177 }
1178
1179 // The process is based on create_mirror().
1180 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1181 oop archived_mirror,
1182 Thread *THREAD) {
1183 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1184 // to archived metadata and objects below.
1185 Klass *c = archived_mirror->klass();
1186 Handle archived_mirror_h(THREAD, archived_mirror);
1187 ResetMirrorField reset(archived_mirror_h);
1188 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1189
1190 if (k->is_array_klass()) {
1191 oop archived_comp_mirror;
1192 if (k->is_typeArray_klass()) {
1193 // The primitive type mirrors are already archived. Get the archived mirror.
1194 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1195 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1196 assert(archived_comp_mirror != NULL, "Must be");
1197 } else {
1198 assert(k->is_objArray_klass(), "Must be");
1199 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1200 assert(element_klass != NULL, "Must have an element klass");
1201 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1202 if (archived_comp_mirror == NULL) {
1203 return NULL;
1204 }
1205 }
1206 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1207 } else {
1208 assert(k->is_instance_klass(), "Must be");
1209
1210 // Reset local static fields in the mirror
1211 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1212
1213 java_lang_Class:set_init_lock(archived_mirror, NULL);
1214
1215 set_protection_domain(archived_mirror, NULL);
1216 }
1217
1218 // clear class loader and mirror_module_field
1219 set_class_loader(archived_mirror, NULL);
1220 set_module(archived_mirror, NULL);
1221
1222 // The archived mirror's field at _klass_offset is still pointing to the original
1223 // klass. Updated the field in the archived mirror to point to the relocated
1224 // klass in the archive.
1225 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1226 log_debug(cds, heap, mirror)(
1227 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1228 p2i(as_Klass(mirror)), p2i(reloc_k));
1229 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1230
1231 // The field at _array_klass_offset is pointing to the original one dimension
1232 // higher array klass if exists. Relocate the pointer.
1233 Klass *arr = array_klass_acquire(mirror);
1234 if (arr != NULL) {
1235 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1236 log_debug(cds, heap, mirror)(
1237 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1238 p2i(arr), p2i(reloc_arr));
1239 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1240 }
1241 return archived_mirror;
1242 }
1243
1244 // Returns true if the mirror is updated, false if no archived mirror
1245 // data is present. After the archived mirror object is restored, the
1246 // shared klass' _has_raw_archived_mirror flag is cleared.
1247 bool java_lang_Class::restore_archived_mirror(Klass *k,
1248 Handle class_loader, Handle module,
1249 Handle protection_domain, TRAPS) {
1250 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1251 // see more details in SystemDictionary::resolve_well_known_classes().
1252 if (!SystemDictionary::Class_klass_loaded()) {
1253 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1254 fixup_mirror_list()->push(k);
1255 return true;
1256 }
1257
1258 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1259
1260 if (m == NULL) {
1261 return false;
1262 }
1263
1264 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1265
1266 // mirror is archived, restore
1267 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1268 Handle mirror(THREAD, m);
1269
1270 if (!k->is_array_klass()) {
1271 // - local static final fields with initial values were initialized at dump time
1272
1273 // create the init_lock
1274 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1275 set_init_lock(mirror(), r);
1276
1277 if (protection_domain.not_null()) {
1278 set_protection_domain(mirror(), protection_domain());
1279 }
1280 }
1281
1282 assert(class_loader() == k->class_loader(), "should be same");
1283 if (class_loader.not_null()) {
1284 set_class_loader(mirror(), class_loader());
1285 }
1286
1287 k->set_java_mirror(mirror);
1288 k->clear_has_raw_archived_mirror();
1289
1290 set_mirror_module_field(k, mirror, module, THREAD);
1291
1292 ResourceMark rm;
1293 log_trace(cds, heap, mirror)(
1294 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1295
1296 return true;
1297 }
1298 #endif // INCLUDE_CDS_JAVA_HEAP
1299
1300 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1301 assert(_module_offset != 0, "must have been computed already");
1302 java_lang_Class::set_module(k->java_mirror(), module());
1303 }
1304
1305 int java_lang_Class::oop_size(oop java_class) {
1306 assert(_oop_size_offset != 0, "must be set");
1307 int size = java_class->int_field(_oop_size_offset);
1308 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1309 return size;
1310 }
1311
1312
1313 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1314 assert(_oop_size_offset != 0, "must be set");
1315 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1316 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1317 }
1318
1319 int java_lang_Class::static_oop_field_count(oop java_class) {
1320 assert(_static_oop_field_count_offset != 0, "must be set");
1321 return java_class->int_field(_static_oop_field_count_offset);
1322 }
1323
1324 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1325 assert(_static_oop_field_count_offset != 0, "must be set");
1326 return java_class->int_field_raw(_static_oop_field_count_offset);
1327 }
1328
1329 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1330 assert(_static_oop_field_count_offset != 0, "must be set");
1331 java_class->int_field_put(_static_oop_field_count_offset, size);
1332 }
1333
1334 oop java_lang_Class::protection_domain(oop java_class) {
1335 assert(_protection_domain_offset != 0, "must be set");
1336 return java_class->obj_field(_protection_domain_offset);
1337 }
1338 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1339 assert(_protection_domain_offset != 0, "must be set");
1340 java_class->obj_field_put(_protection_domain_offset, pd);
1341 }
1342
1343 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1344 assert(_component_mirror_offset != 0, "must be set");
1345 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1346 }
1347 oop java_lang_Class::component_mirror(oop java_class) {
1348 assert(_component_mirror_offset != 0, "must be set");
1349 return java_class->obj_field(_component_mirror_offset);
1350 }
1351
1352 oop java_lang_Class::init_lock(oop java_class) {
1353 assert(_init_lock_offset != 0, "must be set");
1354 return java_class->obj_field(_init_lock_offset);
1355 }
1356 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1357 assert(_init_lock_offset != 0, "must be set");
1358 java_class->obj_field_put(_init_lock_offset, init_lock);
1359 }
1360
1361 objArrayOop java_lang_Class::signers(oop java_class) {
1362 assert(_signers_offset != 0, "must be set");
1363 return (objArrayOop)java_class->obj_field(_signers_offset);
1364 }
1365 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1366 assert(_signers_offset != 0, "must be set");
1367 java_class->obj_field_put(_signers_offset, (oop)signers);
1368 }
1369
1370
1371 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1372 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1373 if (_class_loader_offset != 0) {
1374 java_class->obj_field_put(_class_loader_offset, loader);
1375 }
1376 }
1377
1378 oop java_lang_Class::class_loader(oop java_class) {
1379 assert(_class_loader_offset != 0, "must be set");
1380 return java_class->obj_field(_class_loader_offset);
1381 }
1382
1383 oop java_lang_Class::module(oop java_class) {
1384 assert(_module_offset != 0, "must be set");
1385 return java_class->obj_field(_module_offset);
1386 }
1387
1388 void java_lang_Class::set_module(oop java_class, oop module) {
1389 assert(_module_offset != 0, "must be set");
1390 java_class->obj_field_put(_module_offset, module);
1391 }
1392
1393 oop java_lang_Class::name(Handle java_class, TRAPS) {
1394 assert(_name_offset != 0, "must be set");
1395 oop o = java_class->obj_field(_name_offset);
1396 if (o == NULL) {
1397 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1398 java_class->obj_field_put(_name_offset, o);
1399 }
1400 return o;
1401 }
1402
1403 oop java_lang_Class::source_file(oop java_class) {
1404 assert(_source_file_offset != 0, "must be set");
1405 return java_class->obj_field(_source_file_offset);
1406 }
1407
1408 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1409 assert(_source_file_offset != 0, "must be set");
1410 java_class->obj_field_put(_source_file_offset, source_file);
1411 }
1412
1413 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1414 // This should be improved by adding a field at the Java level or by
1415 // introducing a new VM klass (see comment in ClassFileParser)
1416 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1417 if (type != T_VOID) {
1418 Klass* aklass = Universe::typeArrayKlassObj(type);
1419 assert(aklass != NULL, "correct bootstrap");
1420 release_set_array_klass(java_class, aklass);
1421 }
1422 #ifdef ASSERT
1423 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1424 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1425 #endif
1426 return java_class;
1427 }
1428
1429
1430 Klass* java_lang_Class::as_Klass(oop java_class) {
1431 //%note memory_2
1432 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1433 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1434 assert(k == NULL || k->is_klass(), "type check");
1435 return k;
1436 }
1437
1438 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1439 //%note memory_2
1440 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1441 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1442 assert(k == NULL || k->is_klass(), "type check");
1443 return k;
1444 }
1445
1446
1447 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1448 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1449 java_class->metadata_field_put(_klass_offset, klass);
1450 }
1451
1452
1453 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1454 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1455 Symbol* name = NULL;
1456 bool is_instance = false;
1457 if (is_primitive(java_class)) {
1458 name = vmSymbols::type_signature(primitive_type(java_class));
1459 } else {
1460 Klass* k = as_Klass(java_class);
1461 is_instance = k->is_instance_klass();
1462 name = k->name();
1463 }
1464 if (name == NULL) {
1465 st->print("<null>");
1466 return;
1467 }
1468 if (is_instance) st->print("L");
1469 st->write((char*) name->base(), (int) name->utf8_length());
1470 if (is_instance) st->print(";");
1471 }
1472
1473 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1474 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1475 Symbol* name;
1476 if (is_primitive(java_class)) {
1477 name = vmSymbols::type_signature(primitive_type(java_class));
1478 // Because this can create a new symbol, the caller has to decrement
1479 // the refcount, so make adjustment here and below for symbols returned
1480 // that are not created or incremented due to a successful lookup.
1481 name->increment_refcount();
1482 } else {
1483 Klass* k = as_Klass(java_class);
1484 if (!k->is_instance_klass()) {
1485 name = k->name();
1486 name->increment_refcount();
1487 } else {
1488 ResourceMark rm;
1489 const char* sigstr = k->signature_name();
1490 int siglen = (int) strlen(sigstr);
1491 if (!intern_if_not_found) {
1492 name = SymbolTable::probe(sigstr, siglen);
1493 } else {
1494 name = SymbolTable::new_symbol(sigstr, siglen);
1495 }
1496 }
1497 }
1498 return name;
1499 }
1500
1501 // Returns the Java name for this Java mirror (Resource allocated)
1502 // See Klass::external_name().
1503 // For primitive type Java mirrors, its type name is returned.
1504 const char* java_lang_Class::as_external_name(oop java_class) {
1505 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1506 const char* name = NULL;
1507 if (is_primitive(java_class)) {
1508 name = type2name(primitive_type(java_class));
1509 } else {
1510 name = as_Klass(java_class)->external_name();
1511 }
1512 if (name == NULL) {
1513 name = "<null>";
1514 }
1515 return name;
1516 }
1517
1518 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1519 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1520 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1521 return k;
1522 }
1523
1524
1525 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1526 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1527 java_class->release_metadata_field_put(_array_klass_offset, klass);
1528 }
1529
1530
1531 BasicType java_lang_Class::primitive_type(oop java_class) {
1532 assert(java_lang_Class::is_primitive(java_class), "just checking");
1533 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1534 BasicType type = T_VOID;
1535 if (ak != NULL) {
1536 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1537 type = ArrayKlass::cast(ak)->element_type();
1538 } else {
1539 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1540 }
1541 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1542 return type;
1543 }
1544
1545 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1546 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1547 if (is_primitive(java_class)) {
1548 if (reference_klass != NULL)
1549 (*reference_klass) = NULL;
1550 return primitive_type(java_class);
1551 } else {
1552 if (reference_klass != NULL)
1553 (*reference_klass) = as_Klass(java_class);
1554 return T_OBJECT;
1555 }
1556 }
1557
1558
1559 oop java_lang_Class::primitive_mirror(BasicType t) {
1560 oop mirror = Universe::java_mirror(t);
1561 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1562 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1563 return mirror;
1564 }
1565
1566 bool java_lang_Class::offsets_computed = false;
1567 int java_lang_Class::classRedefinedCount_offset = -1;
1568
1569 #define CLASS_FIELDS_DO(macro) \
1570 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1571 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1572 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1573 macro(_module_offset, k, "module", module_signature, false); \
1574 macro(_name_offset, k, "name", string_signature, false); \
1575
1576 void java_lang_Class::compute_offsets() {
1577 if (offsets_computed) {
1578 return;
1579 }
1580
1581 offsets_computed = true;
1582
1583 InstanceKlass* k = SystemDictionary::Class_klass();
1584 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1585
1586 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1587 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1588 // GC treats them the same.
1589 _init_lock_offset = _component_mirror_offset;
1590
1591 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1592 }
1593
1594 #if INCLUDE_CDS
1595 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1596 f->do_bool(&offsets_computed);
1597 f->do_u4((u4*)&_init_lock_offset);
1598
1599 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1600
1601 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1602 }
1603 #endif
1604
1605 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1606 if (classRedefinedCount_offset == -1) {
1607 // If we don't have an offset for it then just return -1 as a marker.
1608 return -1;
1609 }
1610
1611 return the_class_mirror->int_field(classRedefinedCount_offset);
1612 }
1613
1614 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1615 if (classRedefinedCount_offset == -1) {
1616 // If we don't have an offset for it then nothing to set.
1617 return;
1618 }
1619
1620 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1621 }
1622
1623
1624 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1625 // platform thread structure, and a eetop offset which was used for thread
1626 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1627 // merged, so in the HotSpot VM we just use the eetop field for the thread
1628 // instead of the privateInfo_offset.
1629 //
1630 // Note: The stackSize field is only present starting in 1.4.
1631
1632 int java_lang_Thread::_name_offset = 0;
1633 int java_lang_Thread::_group_offset = 0;
1634 int java_lang_Thread::_contextClassLoader_offset = 0;
1635 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1636 int java_lang_Thread::_priority_offset = 0;
1637 int java_lang_Thread::_eetop_offset = 0;
1638 int java_lang_Thread::_interrupted_offset = 0;
1639 int java_lang_Thread::_daemon_offset = 0;
1640 int java_lang_Thread::_stillborn_offset = 0;
1641 int java_lang_Thread::_stackSize_offset = 0;
1642 int java_lang_Thread::_tid_offset = 0;
1643 int java_lang_Thread::_thread_status_offset = 0;
1644 int java_lang_Thread::_park_blocker_offset = 0;
1645
1646 #define THREAD_FIELDS_DO(macro) \
1647 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1648 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1649 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1650 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1651 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1652 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1653 macro(_eetop_offset, k, "eetop", long_signature, false); \
1654 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1655 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1656 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1657 macro(_tid_offset, k, "tid", long_signature, false); \
1658 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1659 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1660
1661 void java_lang_Thread::compute_offsets() {
1662 assert(_group_offset == 0, "offsets should be initialized only once");
1663
1664 InstanceKlass* k = SystemDictionary::Thread_klass();
1665 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1666 }
1667
1668 #if INCLUDE_CDS
1669 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1670 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1671 }
1672 #endif
1673
1674 JavaThread* java_lang_Thread::thread(oop java_thread) {
1675 return (JavaThread*)java_thread->address_field(_eetop_offset);
1676 }
1677
1678
1679 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1680 java_thread->address_field_put(_eetop_offset, (address)thread);
1681 }
1682
1683 bool java_lang_Thread::interrupted(oop java_thread) {
1684 #if INCLUDE_JFR
1685 if (java_thread == NULL) {
1686 // can happen from Jfr::on_vm_init leading to call of JavaThread::sleep
1687 assert(!is_init_completed(), "should only happen during init");
1688 return false;
1689 }
1690 #endif
1691 return java_thread->bool_field_volatile(_interrupted_offset);
1692 }
1693
1694 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1695 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1696 }
1697
1698
1699 oop java_lang_Thread::name(oop java_thread) {
1700 return java_thread->obj_field(_name_offset);
1701 }
1702
1703
1704 void java_lang_Thread::set_name(oop java_thread, oop name) {
1705 java_thread->obj_field_put(_name_offset, name);
1706 }
1707
1708
1709 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1710 return (ThreadPriority)java_thread->int_field(_priority_offset);
1711 }
1712
1713
1714 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1715 java_thread->int_field_put(_priority_offset, priority);
1716 }
1717
1718
1719 oop java_lang_Thread::threadGroup(oop java_thread) {
1720 return java_thread->obj_field(_group_offset);
1721 }
1722
1723
1724 bool java_lang_Thread::is_stillborn(oop java_thread) {
1725 return java_thread->bool_field(_stillborn_offset) != 0;
1726 }
1727
1728
1729 // We never have reason to turn the stillborn bit off
1730 void java_lang_Thread::set_stillborn(oop java_thread) {
1731 java_thread->bool_field_put(_stillborn_offset, true);
1732 }
1733
1734
1735 bool java_lang_Thread::is_alive(oop java_thread) {
1736 JavaThread* thr = java_lang_Thread::thread(java_thread);
1737 return (thr != NULL);
1738 }
1739
1740
1741 bool java_lang_Thread::is_daemon(oop java_thread) {
1742 return java_thread->bool_field(_daemon_offset) != 0;
1743 }
1744
1745
1746 void java_lang_Thread::set_daemon(oop java_thread) {
1747 java_thread->bool_field_put(_daemon_offset, true);
1748 }
1749
1750 oop java_lang_Thread::context_class_loader(oop java_thread) {
1751 return java_thread->obj_field(_contextClassLoader_offset);
1752 }
1753
1754 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1755 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1756 }
1757
1758
1759 jlong java_lang_Thread::stackSize(oop java_thread) {
1760 return java_thread->long_field(_stackSize_offset);
1761 }
1762
1763 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1764 void java_lang_Thread::set_thread_status(oop java_thread,
1765 java_lang_Thread::ThreadStatus status) {
1766 java_thread->int_field_put(_thread_status_offset, status);
1767 }
1768
1769 // Read thread status value from threadStatus field in java.lang.Thread java class.
1770 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1771 // Make sure the caller is operating on behalf of the VM or is
1772 // running VM code (state == _thread_in_vm).
1773 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1774 JavaThread::current()->thread_state() == _thread_in_vm,
1775 "Java Thread is not running in vm");
1776 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1777 }
1778
1779
1780 jlong java_lang_Thread::thread_id(oop java_thread) {
1781 return java_thread->long_field(_tid_offset);
1782 }
1783
1784 oop java_lang_Thread::park_blocker(oop java_thread) {
1785 return java_thread->obj_field(_park_blocker_offset);
1786 }
1787
1788 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1789 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1790 switch (status) {
1791 case NEW : return "NEW";
1792 case RUNNABLE : return "RUNNABLE";
1793 case SLEEPING : return "TIMED_WAITING (sleeping)";
1794 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1795 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1796 case PARKED : return "WAITING (parking)";
1797 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1798 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1799 case TERMINATED : return "TERMINATED";
1800 default : return "UNKNOWN";
1801 };
1802 }
1803 int java_lang_ThreadGroup::_parent_offset = 0;
1804 int java_lang_ThreadGroup::_name_offset = 0;
1805 int java_lang_ThreadGroup::_threads_offset = 0;
1806 int java_lang_ThreadGroup::_groups_offset = 0;
1807 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1808 int java_lang_ThreadGroup::_destroyed_offset = 0;
1809 int java_lang_ThreadGroup::_daemon_offset = 0;
1810 int java_lang_ThreadGroup::_nthreads_offset = 0;
1811 int java_lang_ThreadGroup::_ngroups_offset = 0;
1812
1813 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1814 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1815 return java_thread_group->obj_field(_parent_offset);
1816 }
1817
1818 // ("name as oop" accessor is not necessary)
1819
1820 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1821 oop name = java_thread_group->obj_field(_name_offset);
1822 // ThreadGroup.name can be null
1823 if (name != NULL) {
1824 return java_lang_String::as_utf8_string(name);
1825 }
1826 return NULL;
1827 }
1828
1829 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1830 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1831 return java_thread_group->int_field(_nthreads_offset);
1832 }
1833
1834 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1835 oop threads = java_thread_group->obj_field(_threads_offset);
1836 assert(threads != NULL, "threadgroups should have threads");
1837 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1838 return objArrayOop(threads);
1839 }
1840
1841 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1842 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1843 return java_thread_group->int_field(_ngroups_offset);
1844 }
1845
1846 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1847 oop groups = java_thread_group->obj_field(_groups_offset);
1848 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1849 return objArrayOop(groups);
1850 }
1851
1852 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1853 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1854 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1855 }
1856
1857 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1858 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1859 return java_thread_group->bool_field(_destroyed_offset) != 0;
1860 }
1861
1862 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1863 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1864 return java_thread_group->bool_field(_daemon_offset) != 0;
1865 }
1866
1867 #define THREADGROUP_FIELDS_DO(macro) \
1868 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1869 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1870 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1871 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1872 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1873 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1874 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1875 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1876 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1877
1878 void java_lang_ThreadGroup::compute_offsets() {
1879 assert(_parent_offset == 0, "offsets should be initialized only once");
1880
1881 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1882 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1883 }
1884
1885 #if INCLUDE_CDS
1886 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1887 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1888 }
1889 #endif
1890
1891 #define THROWABLE_FIELDS_DO(macro) \
1892 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1893 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1894 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1895 macro(depth_offset, k, "depth", int_signature, false); \
1896 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1897
1898 void java_lang_Throwable::compute_offsets() {
1899 InstanceKlass* k = SystemDictionary::Throwable_klass();
1900 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1901 }
1902
1903 #if INCLUDE_CDS
1904 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1905 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1906 }
1907 #endif
1908
1909 oop java_lang_Throwable::unassigned_stacktrace() {
1910 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1911 oop base = ik->static_field_base_raw();
1912 return base->obj_field(static_unassigned_stacktrace_offset);
1913 }
1914
1915 oop java_lang_Throwable::backtrace(oop throwable) {
1916 return throwable->obj_field_acquire(backtrace_offset);
1917 }
1918
1919
1920 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1921 throwable->release_obj_field_put(backtrace_offset, value);
1922 }
1923
1924 int java_lang_Throwable::depth(oop throwable) {
1925 return throwable->int_field(depth_offset);
1926 }
1927
1928 void java_lang_Throwable::set_depth(oop throwable, int value) {
1929 throwable->int_field_put(depth_offset, value);
1930 }
1931
1932 oop java_lang_Throwable::message(oop throwable) {
1933 return throwable->obj_field(detailMessage_offset);
1934 }
1935
1936
1937 // Return Symbol for detailed_message or NULL
1938 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1939 PRESERVE_EXCEPTION_MARK; // Keep original exception
1940 oop detailed_message = java_lang_Throwable::message(throwable);
1941 if (detailed_message != NULL) {
1942 return java_lang_String::as_symbol(detailed_message);
1943 }
1944 return NULL;
1945 }
1946
1947 void java_lang_Throwable::set_message(oop throwable, oop value) {
1948 throwable->obj_field_put(detailMessage_offset, value);
1949 }
1950
1951
1952 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1953 throwable->obj_field_put(stackTrace_offset, st_element_array);
1954 }
1955
1956 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1957 set_stacktrace(throwable, NULL);
1958 }
1959
1960
1961 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1962 ResourceMark rm;
1963 Klass* k = throwable->klass();
1964 assert(k != NULL, "just checking");
1965 st->print("%s", k->external_name());
1966 oop msg = message(throwable);
1967 if (msg != NULL) {
1968 st->print(": %s", java_lang_String::as_utf8_string(msg));
1969 }
1970 }
1971
1972 // After this many redefines, the stack trace is unreliable.
1973 const int MAX_VERSION = USHRT_MAX;
1974
1975 static inline bool version_matches(Method* method, int version) {
1976 assert(version < MAX_VERSION, "version is too big");
1977 return method != NULL && (method->constants()->version() == version);
1978 }
1979
1980 // This class provides a simple wrapper over the internal structure of
1981 // exception backtrace to insulate users of the backtrace from needing
1982 // to know what it looks like.
1983 class BacktraceBuilder: public StackObj {
1984 friend class BacktraceIterator;
1985 private:
1986 Handle _backtrace;
1987 objArrayOop _head;
1988 typeArrayOop _methods;
1989 typeArrayOop _bcis;
1990 objArrayOop _mirrors;
1991 typeArrayOop _names; // Needed to insulate method name against redefinition.
1992 // This is set to a java.lang.Boolean(true) if the top frame
1993 // of the backtrace is omitted because it shall be hidden.
1994 // Else it is null.
1995 oop _has_hidden_top_frame;
1996 int _index;
1997 NoSafepointVerifier _nsv;
1998
1999 enum {
2000 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2001 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2002 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2003 trace_names_offset = java_lang_Throwable::trace_names_offset,
2004 trace_next_offset = java_lang_Throwable::trace_next_offset,
2005 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2006 trace_size = java_lang_Throwable::trace_size,
2007 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2008 };
2009
2010 // get info out of chunks
2011 static typeArrayOop get_methods(objArrayHandle chunk) {
2012 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2013 assert(methods != NULL, "method array should be initialized in backtrace");
2014 return methods;
2015 }
2016 static typeArrayOop get_bcis(objArrayHandle chunk) {
2017 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2018 assert(bcis != NULL, "bci array should be initialized in backtrace");
2019 return bcis;
2020 }
2021 static objArrayOop get_mirrors(objArrayHandle chunk) {
2022 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2023 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2024 return mirrors;
2025 }
2026 static typeArrayOop get_names(objArrayHandle chunk) {
2027 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2028 assert(names != NULL, "names array should be initialized in backtrace");
2029 return names;
2030 }
2031 static oop get_has_hidden_top_frame(objArrayHandle chunk) {
2032 oop hidden = chunk->obj_at(trace_hidden_offset);
2033 return hidden;
2034 }
2035
2036 public:
2037
2038 // constructor for new backtrace
2039 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) {
2040 expand(CHECK);
2041 _backtrace = Handle(THREAD, _head);
2042 _index = 0;
2043 }
2044
2045 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2046 _methods = get_methods(backtrace);
2047 _bcis = get_bcis(backtrace);
2048 _mirrors = get_mirrors(backtrace);
2049 _names = get_names(backtrace);
2050 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace);
2051 assert(_methods->length() == _bcis->length() &&
2052 _methods->length() == _mirrors->length() &&
2053 _mirrors->length() == _names->length(),
2054 "method and source information arrays should match");
2055
2056 // head is the preallocated backtrace
2057 _head = backtrace();
2058 _backtrace = Handle(thread, _head);
2059 _index = 0;
2060 }
2061
2062 void expand(TRAPS) {
2063 objArrayHandle old_head(THREAD, _head);
2064 PauseNoSafepointVerifier pnsv(&_nsv);
2065
2066 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2067 objArrayHandle new_head(THREAD, head);
2068
2069 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2070 typeArrayHandle new_methods(THREAD, methods);
2071
2072 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2073 typeArrayHandle new_bcis(THREAD, bcis);
2074
2075 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2076 objArrayHandle new_mirrors(THREAD, mirrors);
2077
2078 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2079 typeArrayHandle new_names(THREAD, names);
2080
2081 if (!old_head.is_null()) {
2082 old_head->obj_at_put(trace_next_offset, new_head());
2083 }
2084 new_head->obj_at_put(trace_methods_offset, new_methods());
2085 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2086 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2087 new_head->obj_at_put(trace_names_offset, new_names());
2088 new_head->obj_at_put(trace_hidden_offset, NULL);
2089
2090 _head = new_head();
2091 _methods = new_methods();
2092 _bcis = new_bcis();
2093 _mirrors = new_mirrors();
2094 _names = new_names();
2095 _index = 0;
2096 }
2097
2098 oop backtrace() {
2099 return _backtrace();
2100 }
2101
2102 inline void push(Method* method, int bci, TRAPS) {
2103 // Smear the -1 bci to 0 since the array only holds unsigned
2104 // shorts. The later line number lookup would just smear the -1
2105 // to a 0 even if it could be recorded.
2106 if (bci == SynchronizationEntryBCI) bci = 0;
2107
2108 if (_index >= trace_chunk_size) {
2109 methodHandle mhandle(THREAD, method);
2110 expand(CHECK);
2111 method = mhandle();
2112 }
2113
2114 _methods->ushort_at_put(_index, method->orig_method_idnum());
2115 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2116
2117 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2118 // klass owning the symbols alive so their refcounts aren't decremented.
2119 Symbol* name = method->name();
2120 _names->symbol_at_put(_index, name);
2121
2122 // We need to save the mirrors in the backtrace to keep the class
2123 // from being unloaded while we still have this stack trace.
2124 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2125 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2126 _index++;
2127 }
2128
2129 void set_has_hidden_top_frame(TRAPS) {
2130 if (_has_hidden_top_frame == NULL) {
2131 jvalue prim;
2132 prim.z = 1;
2133 PauseNoSafepointVerifier pnsv(&_nsv);
2134 _has_hidden_top_frame = java_lang_boxing_object::create(T_BOOLEAN, &prim, CHECK);
2135 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame);
2136 }
2137 }
2138
2139 };
2140
2141 struct BacktraceElement : public StackObj {
2142 int _method_id;
2143 int _bci;
2144 int _version;
2145 Symbol* _name;
2146 Handle _mirror;
2147 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2148 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2149 };
2150
2151 class BacktraceIterator : public StackObj {
2152 int _index;
2153 objArrayHandle _result;
2154 objArrayHandle _mirrors;
2155 typeArrayHandle _methods;
2156 typeArrayHandle _bcis;
2157 typeArrayHandle _names;
2158
2159 void init(objArrayHandle result, Thread* thread) {
2160 // Get method id, bci, version and mirror from chunk
2161 _result = result;
2162 if (_result.not_null()) {
2163 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2164 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2165 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2166 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2167 _index = 0;
2168 }
2169 }
2170 public:
2171 BacktraceIterator(objArrayHandle result, Thread* thread) {
2172 init(result, thread);
2173 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2174 }
2175
2176 BacktraceElement next(Thread* thread) {
2177 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2178 _methods->ushort_at(_index),
2179 Backtrace::version_at(_bcis->int_at(_index)),
2180 Backtrace::bci_at(_bcis->int_at(_index)),
2181 _names->symbol_at(_index));
2182 _index++;
2183
2184 if (_index >= java_lang_Throwable::trace_chunk_size) {
2185 int next_offset = java_lang_Throwable::trace_next_offset;
2186 // Get next chunk
2187 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2188 init(result, thread);
2189 }
2190 return e;
2191 }
2192
2193 bool repeat() {
2194 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2195 }
2196 };
2197
2198
2199 // Print stack trace element to resource allocated buffer
2200 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2201 int version, int bci, Symbol* name) {
2202 ResourceMark rm;
2203
2204 // Get strings and string lengths
2205 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2206 const char* klass_name = holder->external_name();
2207 int buf_len = (int)strlen(klass_name);
2208
2209 char* method_name = name->as_C_string();
2210 buf_len += (int)strlen(method_name);
2211
2212 char* source_file_name = NULL;
2213 Symbol* source = Backtrace::get_source_file_name(holder, version);
2214 if (source != NULL) {
2215 source_file_name = source->as_C_string();
2216 buf_len += (int)strlen(source_file_name);
2217 }
2218
2219 char *module_name = NULL, *module_version = NULL;
2220 ModuleEntry* module = holder->module();
2221 if (module->is_named()) {
2222 module_name = module->name()->as_C_string();
2223 buf_len += (int)strlen(module_name);
2224 if (module->version() != NULL) {
2225 module_version = module->version()->as_C_string();
2226 buf_len += (int)strlen(module_version);
2227 }
2228 }
2229
2230 // Allocate temporary buffer with extra space for formatting and line number
2231 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2232
2233 // Print stack trace line in buffer
2234 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2235
2236 // Print module information
2237 if (module_name != NULL) {
2238 if (module_version != NULL) {
2239 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2240 } else {
2241 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2242 }
2243 }
2244
2245 // The method can be NULL if the requested class version is gone
2246 Method* method = holder->method_with_orig_idnum(method_id, version);
2247 if (!version_matches(method, version)) {
2248 strcat(buf, "Redefined)");
2249 } else {
2250 int line_number = Backtrace::get_line_number(method, bci);
2251 if (line_number == -2) {
2252 strcat(buf, "Native Method)");
2253 } else {
2254 if (source_file_name != NULL && (line_number != -1)) {
2255 // Sourcename and linenumber
2256 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2257 } else if (source_file_name != NULL) {
2258 // Just sourcename
2259 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2260 } else {
2261 // Neither sourcename nor linenumber
2262 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2263 }
2264 CompiledMethod* nm = method->code();
2265 if (WizardMode && nm != NULL) {
2266 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2267 }
2268 }
2269 }
2270
2271 st->print_cr("%s", buf);
2272 }
2273
2274 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2275 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2276 int method_id = method->orig_method_idnum();
2277 int version = method->constants()->version();
2278 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2279 }
2280
2281 /**
2282 * Print the throwable message and its stack trace plus all causes by walking the
2283 * cause chain. The output looks the same as of Throwable.printStackTrace().
2284 */
2285 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2286 // First, print the message.
2287 print(throwable(), st);
2288 st->cr();
2289
2290 // Now print the stack trace.
2291 Thread* THREAD = Thread::current();
2292 while (throwable.not_null()) {
2293 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2294 if (result.is_null()) {
2295 st->print_raw_cr("\t<<no stack trace available>>");
2296 return;
2297 }
2298 BacktraceIterator iter(result, THREAD);
2299
2300 while (iter.repeat()) {
2301 BacktraceElement bte = iter.next(THREAD);
2302 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2303 }
2304 {
2305 // Call getCause() which doesn't necessarily return the _cause field.
2306 EXCEPTION_MARK;
2307 JavaValue cause(T_OBJECT);
2308 JavaCalls::call_virtual(&cause,
2309 throwable,
2310 throwable->klass(),
2311 vmSymbols::getCause_name(),
2312 vmSymbols::void_throwable_signature(),
2313 THREAD);
2314 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2315 if (HAS_PENDING_EXCEPTION) {
2316 CLEAR_PENDING_EXCEPTION;
2317 throwable = Handle();
2318 } else {
2319 throwable = Handle(THREAD, (oop) cause.get_jobject());
2320 if (throwable.not_null()) {
2321 st->print("Caused by: ");
2322 print(throwable(), st);
2323 st->cr();
2324 }
2325 }
2326 }
2327 }
2328 }
2329
2330 /**
2331 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2332 */
2333 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2334 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2335 JavaValue result(T_VOID);
2336 JavaCalls::call_virtual(&result,
2337 throwable,
2338 SystemDictionary::Throwable_klass(),
2339 vmSymbols::printStackTrace_name(),
2340 vmSymbols::void_method_signature(),
2341 THREAD);
2342 }
2343
2344 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2345 if (!StackTraceInThrowable) return;
2346 ResourceMark rm(THREAD);
2347
2348 // Start out by clearing the backtrace for this object, in case the VM
2349 // runs out of memory while allocating the stack trace
2350 set_backtrace(throwable(), NULL);
2351 // Clear lazily constructed Java level stacktrace if refilling occurs
2352 // This is unnecessary in 1.7+ but harmless
2353 clear_stacktrace(throwable());
2354
2355 int max_depth = MaxJavaStackTraceDepth;
2356 JavaThread* thread = (JavaThread*)THREAD;
2357
2358 BacktraceBuilder bt(CHECK);
2359
2360 // If there is no Java frame just return the method that was being called
2361 // with bci 0
2362 if (!thread->has_last_Java_frame()) {
2363 if (max_depth >= 1 && method() != NULL) {
2364 bt.push(method(), 0, CHECK);
2365 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2366 set_depth(throwable(), 1);
2367 set_backtrace(throwable(), bt.backtrace());
2368 }
2369 return;
2370 }
2371
2372 // Instead of using vframe directly, this version of fill_in_stack_trace
2373 // basically handles everything by hand. This significantly improved the
2374 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2375 // See bug 6333838 for more details.
2376 // The "ASSERT" here is to verify this method generates the exactly same stack
2377 // trace as utilizing vframe.
2378 #ifdef ASSERT
2379 vframeStream st(thread);
2380 methodHandle st_method(THREAD, st.method());
2381 #endif
2382 int total_count = 0;
2383 RegisterMap map(thread, false);
2384 int decode_offset = 0;
2385 CompiledMethod* nm = NULL;
2386 bool skip_fillInStackTrace_check = false;
2387 bool skip_throwableInit_check = false;
2388 bool skip_hidden = !ShowHiddenFrames;
2389
2390 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2391 Method* method = NULL;
2392 int bci = 0;
2393
2394 // Compiled java method case.
2395 if (decode_offset != 0) {
2396 DebugInfoReadStream stream(nm, decode_offset);
2397 decode_offset = stream.read_int();
2398 method = (Method*)nm->metadata_at(stream.read_int());
2399 bci = stream.read_bci();
2400 } else {
2401 if (fr.is_first_frame()) break;
2402 address pc = fr.pc();
2403 if (fr.is_interpreted_frame()) {
2404 address bcp = fr.interpreter_frame_bcp();
2405 method = fr.interpreter_frame_method();
2406 bci = method->bci_from(bcp);
2407 fr = fr.sender(&map);
2408 } else {
2409 CodeBlob* cb = fr.cb();
2410 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2411 // but non nmethod
2412 fr = fr.sender(&map);
2413 if (cb == NULL || !cb->is_compiled()) {
2414 continue;
2415 }
2416 nm = cb->as_compiled_method();
2417 if (nm->method()->is_native()) {
2418 method = nm->method();
2419 bci = 0;
2420 } else {
2421 PcDesc* pd = nm->pc_desc_at(pc);
2422 decode_offset = pd->scope_decode_offset();
2423 // if decode_offset is not equal to 0, it will execute the
2424 // "compiled java method case" at the beginning of the loop.
2425 continue;
2426 }
2427 }
2428 }
2429 #ifdef ASSERT
2430 assert(st_method() == method && st.bci() == bci,
2431 "Wrong stack trace");
2432 st.next();
2433 // vframeStream::method isn't GC-safe so store off a copy
2434 // of the Method* in case we GC.
2435 if (!st.at_end()) {
2436 st_method = st.method();
2437 }
2438 #endif
2439
2440 // the format of the stacktrace will be:
2441 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2442 // - 0 or more <init> methods for the exception class (skipped)
2443 // - rest of the stack
2444
2445 if (!skip_fillInStackTrace_check) {
2446 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2447 throwable->is_a(method->method_holder())) {
2448 continue;
2449 }
2450 else {
2451 skip_fillInStackTrace_check = true; // gone past them all
2452 }
2453 }
2454 if (!skip_throwableInit_check) {
2455 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2456
2457 // skip <init> methods of the exception class and superclasses
2458 // This is simlar to classic VM.
2459 if (method->name() == vmSymbols::object_initializer_name() &&
2460 throwable->is_a(method->method_holder())) {
2461 continue;
2462 } else {
2463 // there are none or we've seen them all - either way stop checking
2464 skip_throwableInit_check = true;
2465 }
2466 }
2467 if (method->is_hidden()) {
2468 if (skip_hidden) {
2469 if (total_count == 0) {
2470 // The top frame will be hidden from the stack trace.
2471 bt.set_has_hidden_top_frame(CHECK);
2472 }
2473 continue;
2474 }
2475 }
2476 bt.push(method, bci, CHECK);
2477 total_count++;
2478 }
2479
2480 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2481
2482 // Put completed stack trace into throwable object
2483 set_backtrace(throwable(), bt.backtrace());
2484 set_depth(throwable(), total_count);
2485 }
2486
2487 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2488 // No-op if stack trace is disabled
2489 if (!StackTraceInThrowable) {
2490 return;
2491 }
2492
2493 // Disable stack traces for some preallocated out of memory errors
2494 if (!Universe::should_fill_in_stack_trace(throwable)) {
2495 return;
2496 }
2497
2498 PRESERVE_EXCEPTION_MARK;
2499
2500 JavaThread* thread = JavaThread::active();
2501 fill_in_stack_trace(throwable, method, thread);
2502 // ignore exceptions thrown during stack trace filling
2503 CLEAR_PENDING_EXCEPTION;
2504 }
2505
2506 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2507 // Allocate stack trace - backtrace is created but not filled in
2508
2509 // No-op if stack trace is disabled
2510 if (!StackTraceInThrowable) return;
2511 BacktraceBuilder bt(CHECK); // creates a backtrace
2512 set_backtrace(throwable(), bt.backtrace());
2513 }
2514
2515
2516 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2517 // Fill in stack trace into preallocated backtrace (no GC)
2518
2519 // No-op if stack trace is disabled
2520 if (!StackTraceInThrowable) return;
2521
2522 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2523
2524 JavaThread* THREAD = JavaThread::current();
2525
2526 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2527 assert(backtrace.not_null(), "backtrace should have been preallocated");
2528
2529 ResourceMark rm(THREAD);
2530 vframeStream st(THREAD);
2531
2532 BacktraceBuilder bt(THREAD, backtrace);
2533
2534 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2535 // methods as preallocated errors aren't created by "java" code.
2536
2537 // fill in as much stack trace as possible
2538 int chunk_count = 0;
2539 for (;!st.at_end(); st.next()) {
2540 bt.push(st.method(), st.bci(), CHECK);
2541 chunk_count++;
2542
2543 // Bail-out for deep stacks
2544 if (chunk_count >= trace_chunk_size) break;
2545 }
2546 set_depth(throwable(), chunk_count);
2547 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2548
2549 // We support the Throwable immutability protocol defined for Java 7.
2550 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2551 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2552 }
2553
2554 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2555 objArrayHandle stack_trace_array_h, TRAPS) {
2556
2557 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2558 THROW(vmSymbols::java_lang_NullPointerException());
2559 }
2560
2561 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2562
2563 if (stack_trace_array_h->length() != depth(throwable())) {
2564 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2565 }
2566
2567 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2568 BacktraceIterator iter(result, THREAD);
2569
2570 int index = 0;
2571 while (iter.repeat()) {
2572 BacktraceElement bte = iter.next(THREAD);
2573
2574 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2575
2576 if (stack_trace_element.is_null()) {
2577 THROW(vmSymbols::java_lang_NullPointerException());
2578 }
2579
2580 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2581 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2582
2583 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2584 method,
2585 bte._version,
2586 bte._bci,
2587 bte._name, CHECK);
2588 }
2589 }
2590
2591 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2592 Thread* THREAD = Thread::current();
2593 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable)));
2594 BacktraceIterator iter(result, THREAD);
2595 // No backtrace available.
2596 if (!iter.repeat()) return false;
2597
2598 // If the exception happened in a frame that has been hidden, i.e.,
2599 // omitted from the back trace, we can not compute the message.
2600 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2601 if (hidden != NULL) {
2602 return false;
2603 }
2604
2605 // Get first backtrace element.
2606 BacktraceElement bte = iter.next(THREAD);
2607
2608 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2609 assert(holder != NULL, "first element should be non-null");
2610 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2611
2612 // Original version is no longer available.
2613 if (m == NULL || !version_matches(m, bte._version)) {
2614 return false;
2615 }
2616
2617 *method = m;
2618 *bci = bte._bci;
2619 return true;
2620 }
2621
2622 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2623 // Allocate java.lang.StackTraceElement instance
2624 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2625 assert(k != NULL, "must be loaded in 1.4+");
2626 if (k->should_be_initialized()) {
2627 k->initialize(CHECK_0);
2628 }
2629
2630 Handle element = k->allocate_instance_handle(CHECK_0);
2631
2632 int version = method->constants()->version();
2633 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2634 return element();
2635 }
2636
2637 void java_lang_StackTraceElement::fill_in(Handle element,
2638 InstanceKlass* holder, const methodHandle& method,
2639 int version, int bci, Symbol* name, TRAPS) {
2640 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2641
2642 ResourceMark rm(THREAD);
2643 HandleMark hm(THREAD);
2644
2645 // Fill in class name
2646 Handle java_class(THREAD, holder->java_mirror());
2647 oop classname = java_lang_Class::name(java_class, CHECK);
2648 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2649 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2650
2651 oop loader = holder->class_loader();
2652 if (loader != NULL) {
2653 oop loader_name = java_lang_ClassLoader::name(loader);
2654 if (loader_name != NULL)
2655 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2656 }
2657
2658 // Fill in method name
2659 oop methodname = StringTable::intern(name, CHECK);
2660 java_lang_StackTraceElement::set_methodName(element(), methodname);
2661
2662 // Fill in module name and version
2663 ModuleEntry* module = holder->module();
2664 if (module->is_named()) {
2665 oop module_name = StringTable::intern(module->name(), CHECK);
2666 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2667 oop module_version;
2668 if (module->version() != NULL) {
2669 module_version = StringTable::intern(module->version(), CHECK);
2670 } else {
2671 module_version = NULL;
2672 }
2673 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2674 }
2675
2676 if (method() == NULL || !version_matches(method(), version)) {
2677 // The method was redefined, accurate line number information isn't available
2678 java_lang_StackTraceElement::set_fileName(element(), NULL);
2679 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2680 } else {
2681 // Fill in source file name and line number.
2682 Symbol* source = Backtrace::get_source_file_name(holder, version);
2683 oop source_file = java_lang_Class::source_file(java_class());
2684 if (source != NULL) {
2685 // Class was not redefined. We can trust its cache if set,
2686 // else we have to initialize it.
2687 if (source_file == NULL) {
2688 source_file = StringTable::intern(source, CHECK);
2689 java_lang_Class::set_source_file(java_class(), source_file);
2690 }
2691 } else {
2692 // Class was redefined. Dump the cache if it was set.
2693 if (source_file != NULL) {
2694 source_file = NULL;
2695 java_lang_Class::set_source_file(java_class(), source_file);
2696 }
2697 }
2698 java_lang_StackTraceElement::set_fileName(element(), source_file);
2699
2700 int line_number = Backtrace::get_line_number(method, bci);
2701 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2702 }
2703 }
2704
2705 #if INCLUDE_JVMCI
2706 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2707 int method_id = method->orig_method_idnum();
2708 int cpref = method->name_index();
2709 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2710 }
2711
2712 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2713 // Fill in class name
2714 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2715 Method* method = holder->method_with_orig_idnum(method_id, version);
2716
2717 // The method can be NULL if the requested class version is gone
2718 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2719
2720 // Fill in method name
2721 methodname = sym;
2722
2723 if (!version_matches(method, version)) {
2724 // If the method was redefined, accurate line number information isn't available
2725 filename = NULL;
2726 line_number = -1;
2727 } else {
2728 // Fill in source file name and line number.
2729 // Use a specific ik version as a holder since the mirror might
2730 // refer to a version that is now obsolete and no longer accessible
2731 // via the previous versions list.
2732 holder = holder->get_klass_version(version);
2733 assert(holder != NULL, "sanity check");
2734 filename = holder->source_file_name();
2735 line_number = Backtrace::get_line_number(method, bci);
2736 }
2737 }
2738 #endif // INCLUDE_JVMCI
2739
2740 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2741 HandleMark hm(THREAD);
2742 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2743 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2744 // we should expand MemberName::name when Throwable uses StackTrace
2745 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2746 return method;
2747 }
2748
2749 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2750 // set Method* or mid/cpref
2751 HandleMark hm(THREAD);
2752 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2753 InstanceKlass* ik = method->method_holder();
2754 CallInfo info(method(), ik, CHECK);
2755 MethodHandles::init_method_MemberName(mname, info);
2756 // set bci
2757 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2758 // method may be redefined; store the version
2759 int version = method->constants()->version();
2760 assert((jushort)version == version, "version should be short");
2761 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2762 }
2763
2764 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2765 ResourceMark rm(THREAD);
2766 HandleMark hm(THREAD);
2767 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2768 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2769 InstanceKlass* holder = InstanceKlass::cast(clazz);
2770 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2771
2772 short version = stackFrame->short_field(_version_offset);
2773 int bci = stackFrame->int_field(_bci_offset);
2774 Symbol* name = method->name();
2775 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2776 }
2777
2778 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2779 macro(_memberName_offset, k, "memberName", object_signature, false); \
2780 macro(_bci_offset, k, "bci", int_signature, false)
2781
2782 void java_lang_StackFrameInfo::compute_offsets() {
2783 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2784 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2785 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2786 }
2787
2788 #if INCLUDE_CDS
2789 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2790 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2791 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2792 }
2793 #endif
2794
2795 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2796 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2797 macro(_locals_offset, k, "locals", object_array_signature, false); \
2798 macro(_operands_offset, k, "operands", object_array_signature, false); \
2799 macro(_mode_offset, k, "mode", int_signature, false)
2800
2801 void java_lang_LiveStackFrameInfo::compute_offsets() {
2802 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2803 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2804 }
2805
2806 #if INCLUDE_CDS
2807 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2808 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2809 }
2810 #endif
2811
2812 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2813 macro(override_offset, k, "override", bool_signature, false)
2814
2815 void java_lang_reflect_AccessibleObject::compute_offsets() {
2816 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2817 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2818 }
2819
2820 #if INCLUDE_CDS
2821 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2822 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2823 }
2824 #endif
2825
2826 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2828 return (jboolean) reflect->bool_field(override_offset);
2829 }
2830
2831 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2833 reflect->bool_field_put(override_offset, (int) value);
2834 }
2835
2836 #define METHOD_FIELDS_DO(macro) \
2837 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2838 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2839 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2840 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2841 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2842 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2843 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2844 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2845 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2846 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2847 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2848
2849 void java_lang_reflect_Method::compute_offsets() {
2850 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2851 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2852 }
2853
2854 #if INCLUDE_CDS
2855 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2856 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2857 }
2858 #endif
2859
2860 Handle java_lang_reflect_Method::create(TRAPS) {
2861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2862 Klass* klass = SystemDictionary::reflect_Method_klass();
2863 // This class is eagerly initialized during VM initialization, since we keep a refence
2864 // to one of the methods
2865 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2866 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2867 }
2868
2869 oop java_lang_reflect_Method::clazz(oop reflect) {
2870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2871 return reflect->obj_field(clazz_offset);
2872 }
2873
2874 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2875 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2876 reflect->obj_field_put(clazz_offset, value);
2877 }
2878
2879 int java_lang_reflect_Method::slot(oop reflect) {
2880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2881 return reflect->int_field(slot_offset);
2882 }
2883
2884 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2886 reflect->int_field_put(slot_offset, value);
2887 }
2888
2889 void java_lang_reflect_Method::set_name(oop method, oop value) {
2890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2891 method->obj_field_put(name_offset, value);
2892 }
2893
2894 oop java_lang_reflect_Method::return_type(oop method) {
2895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2896 return method->obj_field(returnType_offset);
2897 }
2898
2899 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2901 method->obj_field_put(returnType_offset, value);
2902 }
2903
2904 oop java_lang_reflect_Method::parameter_types(oop method) {
2905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2906 return method->obj_field(parameterTypes_offset);
2907 }
2908
2909 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2911 method->obj_field_put(parameterTypes_offset, value);
2912 }
2913
2914 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2916 method->obj_field_put(exceptionTypes_offset, value);
2917 }
2918
2919 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2921 method->int_field_put(modifiers_offset, value);
2922 }
2923
2924 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2926 method->obj_field_put(signature_offset, value);
2927 }
2928
2929 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2931 method->obj_field_put(annotations_offset, value);
2932 }
2933
2934 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2936 method->obj_field_put(parameter_annotations_offset, value);
2937 }
2938
2939 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2941 method->obj_field_put(annotation_default_offset, value);
2942 }
2943
2944 #define CONSTRUCTOR_FIELDS_DO(macro) \
2945 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2946 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2947 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2948 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2949 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2950 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2951 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2952 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2953
2954 void java_lang_reflect_Constructor::compute_offsets() {
2955 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2956 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2957 }
2958
2959 #if INCLUDE_CDS
2960 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2961 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2962 }
2963 #endif
2964
2965 Handle java_lang_reflect_Constructor::create(TRAPS) {
2966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2967 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2968 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2969 InstanceKlass* ik = InstanceKlass::cast(k);
2970 // Ensure it is initialized
2971 ik->initialize(CHECK_NH);
2972 return ik->allocate_instance_handle(THREAD);
2973 }
2974
2975 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977 return reflect->obj_field(clazz_offset);
2978 }
2979
2980 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2982 reflect->obj_field_put(clazz_offset, value);
2983 }
2984
2985 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2987 return constructor->obj_field(parameterTypes_offset);
2988 }
2989
2990 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992 constructor->obj_field_put(parameterTypes_offset, value);
2993 }
2994
2995 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2997 constructor->obj_field_put(exceptionTypes_offset, value);
2998 }
2999
3000 int java_lang_reflect_Constructor::slot(oop reflect) {
3001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3002 return reflect->int_field(slot_offset);
3003 }
3004
3005 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3007 reflect->int_field_put(slot_offset, value);
3008 }
3009
3010 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3012 constructor->int_field_put(modifiers_offset, value);
3013 }
3014
3015 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3017 constructor->obj_field_put(signature_offset, value);
3018 }
3019
3020 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3022 constructor->obj_field_put(annotations_offset, value);
3023 }
3024
3025 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3027 method->obj_field_put(parameter_annotations_offset, value);
3028 }
3029
3030 #define FIELD_FIELDS_DO(macro) \
3031 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3032 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3033 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3034 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3035 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3036 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3037 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3038
3039 void java_lang_reflect_Field::compute_offsets() {
3040 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3041 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3042 }
3043
3044 #if INCLUDE_CDS
3045 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3046 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3047 }
3048 #endif
3049
3050 Handle java_lang_reflect_Field::create(TRAPS) {
3051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3052 Symbol* name = vmSymbols::java_lang_reflect_Field();
3053 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3054 InstanceKlass* ik = InstanceKlass::cast(k);
3055 // Ensure it is initialized
3056 ik->initialize(CHECK_NH);
3057 return ik->allocate_instance_handle(THREAD);
3058 }
3059
3060 oop java_lang_reflect_Field::clazz(oop reflect) {
3061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3062 return reflect->obj_field(clazz_offset);
3063 }
3064
3065 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3066 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3067 reflect->obj_field_put(clazz_offset, value);
3068 }
3069
3070 oop java_lang_reflect_Field::name(oop field) {
3071 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3072 return field->obj_field(name_offset);
3073 }
3074
3075 void java_lang_reflect_Field::set_name(oop field, oop value) {
3076 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3077 field->obj_field_put(name_offset, value);
3078 }
3079
3080 oop java_lang_reflect_Field::type(oop field) {
3081 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3082 return field->obj_field(type_offset);
3083 }
3084
3085 void java_lang_reflect_Field::set_type(oop field, oop value) {
3086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3087 field->obj_field_put(type_offset, value);
3088 }
3089
3090 int java_lang_reflect_Field::slot(oop reflect) {
3091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3092 return reflect->int_field(slot_offset);
3093 }
3094
3095 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3097 reflect->int_field_put(slot_offset, value);
3098 }
3099
3100 int java_lang_reflect_Field::modifiers(oop field) {
3101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3102 return field->int_field(modifiers_offset);
3103 }
3104
3105 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3107 field->int_field_put(modifiers_offset, value);
3108 }
3109
3110 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3112 field->obj_field_put(signature_offset, value);
3113 }
3114
3115 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3117 field->obj_field_put(annotations_offset, value);
3118 }
3119
3120 #define CONSTANTPOOL_FIELDS_DO(macro) \
3121 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3122
3123 void reflect_ConstantPool::compute_offsets() {
3124 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3125 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3126 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3127 }
3128
3129 #if INCLUDE_CDS
3130 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3131 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3132 }
3133 #endif
3134
3135 #define PARAMETER_FIELDS_DO(macro) \
3136 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3137 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3138 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3139 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3140
3141 void java_lang_reflect_Parameter::compute_offsets() {
3142 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3143 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3144 }
3145
3146 #if INCLUDE_CDS
3147 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3148 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3149 }
3150 #endif
3151
3152 Handle java_lang_reflect_Parameter::create(TRAPS) {
3153 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3154 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3155 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3156 InstanceKlass* ik = InstanceKlass::cast(k);
3157 // Ensure it is initialized
3158 ik->initialize(CHECK_NH);
3159 return ik->allocate_instance_handle(THREAD);
3160 }
3161
3162 oop java_lang_reflect_Parameter::name(oop param) {
3163 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3164 return param->obj_field(name_offset);
3165 }
3166
3167 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3169 param->obj_field_put(name_offset, value);
3170 }
3171
3172 int java_lang_reflect_Parameter::modifiers(oop param) {
3173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3174 return param->int_field(modifiers_offset);
3175 }
3176
3177 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3179 param->int_field_put(modifiers_offset, value);
3180 }
3181
3182 int java_lang_reflect_Parameter::index(oop param) {
3183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3184 return param->int_field(index_offset);
3185 }
3186
3187 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3189 param->int_field_put(index_offset, value);
3190 }
3191
3192 oop java_lang_reflect_Parameter::executable(oop param) {
3193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3194 return param->obj_field(executable_offset);
3195 }
3196
3197 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3199 param->obj_field_put(executable_offset, value);
3200 }
3201
3202
3203 int java_lang_Module::loader_offset;
3204 int java_lang_Module::name_offset;
3205 int java_lang_Module::_module_entry_offset = -1;
3206
3207 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3209 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3210 vmSymbols::java_lang_module_init_signature(),
3211 loader, module_name, CHECK_NH);
3212 }
3213
3214 #define MODULE_FIELDS_DO(macro) \
3215 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3216 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3217
3218 void java_lang_Module::compute_offsets() {
3219 InstanceKlass* k = SystemDictionary::Module_klass();
3220 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3221 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3222 }
3223
3224 #if INCLUDE_CDS
3225 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3226 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3227 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3228 }
3229 #endif
3230
3231 oop java_lang_Module::loader(oop module) {
3232 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3233 return module->obj_field(loader_offset);
3234 }
3235
3236 void java_lang_Module::set_loader(oop module, oop value) {
3237 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3238 module->obj_field_put(loader_offset, value);
3239 }
3240
3241 oop java_lang_Module::name(oop module) {
3242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3243 return module->obj_field(name_offset);
3244 }
3245
3246 void java_lang_Module::set_name(oop module, oop value) {
3247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3248 module->obj_field_put(name_offset, value);
3249 }
3250
3251 ModuleEntry* java_lang_Module::module_entry(oop module) {
3252 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3253 assert(module != NULL, "module can't be null");
3254 assert(oopDesc::is_oop(module), "module must be oop");
3255
3256 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3257 if (module_entry == NULL) {
3258 // If the inject field containing the ModuleEntry* is null then return the
3259 // class loader's unnamed module.
3260 oop loader = java_lang_Module::loader(module);
3261 Handle h_loader = Handle(Thread::current(), loader);
3262 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3263 return loader_cld->unnamed_module();
3264 }
3265 return module_entry;
3266 }
3267
3268 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3269 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3270 assert(module != NULL, "module can't be null");
3271 assert(oopDesc::is_oop(module), "module must be oop");
3272 module->address_field_put(_module_entry_offset, (address)module_entry);
3273 }
3274
3275 Handle reflect_ConstantPool::create(TRAPS) {
3276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3277 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3278 // Ensure it is initialized
3279 k->initialize(CHECK_NH);
3280 return k->allocate_instance_handle(THREAD);
3281 }
3282
3283
3284 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3286 oop mirror = value->pool_holder()->java_mirror();
3287 // Save the mirror to get back the constant pool.
3288 reflect->obj_field_put(_oop_offset, mirror);
3289 }
3290
3291 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3293
3294 oop mirror = reflect->obj_field(_oop_offset);
3295 Klass* k = java_lang_Class::as_Klass(mirror);
3296 assert(k->is_instance_klass(), "Must be");
3297
3298 // Get the constant pool back from the klass. Since class redefinition
3299 // merges the new constant pool into the old, this is essentially the
3300 // same constant pool as the original. If constant pool merging is
3301 // no longer done in the future, this will have to change to save
3302 // the original.
3303 return InstanceKlass::cast(k)->constants();
3304 }
3305
3306 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3307 macro(_base_offset, k, "base", object_signature, false)
3308
3309 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3310 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3311 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3312 }
3313
3314 #if INCLUDE_CDS
3315 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3316 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3317 }
3318 #endif
3319
3320 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3321 Klass* k = SystemDictionary::box_klass(type);
3322 if (k == NULL) return NULL;
3323 InstanceKlass* ik = InstanceKlass::cast(k);
3324 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3325 return ik->allocate_instance(THREAD);
3326 }
3327
3328
3329 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3330 oop box = initialize_and_allocate(type, CHECK_0);
3331 if (box == NULL) return NULL;
3332 switch (type) {
3333 case T_BOOLEAN:
3334 box->bool_field_put(value_offset, value->z);
3335 break;
3336 case T_CHAR:
3337 box->char_field_put(value_offset, value->c);
3338 break;
3339 case T_FLOAT:
3340 box->float_field_put(value_offset, value->f);
3341 break;
3342 case T_DOUBLE:
3343 box->double_field_put(long_value_offset, value->d);
3344 break;
3345 case T_BYTE:
3346 box->byte_field_put(value_offset, value->b);
3347 break;
3348 case T_SHORT:
3349 box->short_field_put(value_offset, value->s);
3350 break;
3351 case T_INT:
3352 box->int_field_put(value_offset, value->i);
3353 break;
3354 case T_LONG:
3355 box->long_field_put(long_value_offset, value->j);
3356 break;
3357 default:
3358 return NULL;
3359 }
3360 return box;
3361 }
3362
3363
3364 BasicType java_lang_boxing_object::basic_type(oop box) {
3365 if (box == NULL) return T_ILLEGAL;
3366 BasicType type = SystemDictionary::box_klass_type(box->klass());
3367 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3368 return T_ILLEGAL;
3369 return type;
3370 }
3371
3372
3373 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3374 BasicType type = SystemDictionary::box_klass_type(box->klass());
3375 switch (type) {
3376 case T_BOOLEAN:
3377 value->z = box->bool_field(value_offset);
3378 break;
3379 case T_CHAR:
3380 value->c = box->char_field(value_offset);
3381 break;
3382 case T_FLOAT:
3383 value->f = box->float_field(value_offset);
3384 break;
3385 case T_DOUBLE:
3386 value->d = box->double_field(long_value_offset);
3387 break;
3388 case T_BYTE:
3389 value->b = box->byte_field(value_offset);
3390 break;
3391 case T_SHORT:
3392 value->s = box->short_field(value_offset);
3393 break;
3394 case T_INT:
3395 value->i = box->int_field(value_offset);
3396 break;
3397 case T_LONG:
3398 value->j = box->long_field(long_value_offset);
3399 break;
3400 default:
3401 return T_ILLEGAL;
3402 } // end switch
3403 return type;
3404 }
3405
3406
3407 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3408 BasicType type = SystemDictionary::box_klass_type(box->klass());
3409 switch (type) {
3410 case T_BOOLEAN:
3411 box->bool_field_put(value_offset, value->z);
3412 break;
3413 case T_CHAR:
3414 box->char_field_put(value_offset, value->c);
3415 break;
3416 case T_FLOAT:
3417 box->float_field_put(value_offset, value->f);
3418 break;
3419 case T_DOUBLE:
3420 box->double_field_put(long_value_offset, value->d);
3421 break;
3422 case T_BYTE:
3423 box->byte_field_put(value_offset, value->b);
3424 break;
3425 case T_SHORT:
3426 box->short_field_put(value_offset, value->s);
3427 break;
3428 case T_INT:
3429 box->int_field_put(value_offset, value->i);
3430 break;
3431 case T_LONG:
3432 box->long_field_put(long_value_offset, value->j);
3433 break;
3434 default:
3435 return T_ILLEGAL;
3436 } // end switch
3437 return type;
3438 }
3439
3440
3441 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3442 switch (type) {
3443 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3444 case T_CHAR: st->print("%d", value->c); break;
3445 case T_BYTE: st->print("%d", value->b); break;
3446 case T_SHORT: st->print("%d", value->s); break;
3447 case T_INT: st->print("%d", value->i); break;
3448 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3449 case T_FLOAT: st->print("%f", value->f); break;
3450 case T_DOUBLE: st->print("%lf", value->d); break;
3451 default: st->print("type %d?", type); break;
3452 }
3453 }
3454
3455 // Support for java_lang_ref_Reference
3456
3457 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3458 assert(obj != NULL, "sanity");
3459 if (offset != java_lang_ref_Reference::referent_offset) {
3460 return false;
3461 }
3462
3463 Klass* k = obj->klass();
3464 if (!k->is_instance_klass()) {
3465 return false;
3466 }
3467
3468 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3469 bool is_reference = ik->reference_type() != REF_NONE;
3470 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3471 return is_reference;
3472 }
3473
3474 // Support for java_lang_ref_SoftReference
3475 //
3476
3477 #define SOFTREFERENCE_FIELDS_DO(macro) \
3478 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3479 macro(static_clock_offset, k, "clock", long_signature, true)
3480
3481 void java_lang_ref_SoftReference::compute_offsets() {
3482 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3483 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3484 }
3485
3486 #if INCLUDE_CDS
3487 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3488 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3489 }
3490 #endif
3491
3492 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3493 return ref->long_field(timestamp_offset);
3494 }
3495
3496 jlong java_lang_ref_SoftReference::clock() {
3497 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3498 oop base = ik->static_field_base_raw();
3499 return base->long_field(static_clock_offset);
3500 }
3501
3502 void java_lang_ref_SoftReference::set_clock(jlong value) {
3503 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3504 oop base = ik->static_field_base_raw();
3505 base->long_field_put(static_clock_offset, value);
3506 }
3507
3508 // Support for java_lang_invoke_DirectMethodHandle
3509
3510 int java_lang_invoke_DirectMethodHandle::_member_offset;
3511
3512 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3513 oop member_name = NULL;
3514 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3515 "a DirectMethodHandle oop is expected");
3516 return dmh->obj_field(member_offset_in_bytes());
3517 }
3518
3519 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3520 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3521
3522 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3523 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3524 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3525 }
3526
3527 #if INCLUDE_CDS
3528 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3529 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3530 }
3531 #endif
3532
3533 // Support for java_lang_invoke_MethodHandle
3534
3535 int java_lang_invoke_MethodHandle::_type_offset;
3536 int java_lang_invoke_MethodHandle::_form_offset;
3537
3538 int java_lang_invoke_MemberName::_clazz_offset;
3539 int java_lang_invoke_MemberName::_name_offset;
3540 int java_lang_invoke_MemberName::_type_offset;
3541 int java_lang_invoke_MemberName::_flags_offset;
3542 int java_lang_invoke_MemberName::_method_offset;
3543 int java_lang_invoke_MemberName::_vmindex_offset;
3544
3545 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3546 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3547
3548 int java_lang_invoke_LambdaForm::_vmentry_offset;
3549
3550 #define METHODHANDLE_FIELDS_DO(macro) \
3551 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3552 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3553
3554 void java_lang_invoke_MethodHandle::compute_offsets() {
3555 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3556 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3557 }
3558
3559 #if INCLUDE_CDS
3560 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3561 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3562 }
3563 #endif
3564
3565 #define MEMBERNAME_FIELDS_DO(macro) \
3566 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3567 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3568 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3569 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3570 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3571
3572 void java_lang_invoke_MemberName::compute_offsets() {
3573 InstanceKlass* k = SystemDictionary::MemberName_klass();
3574 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3575 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3576 }
3577
3578 #if INCLUDE_CDS
3579 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3580 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3581 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3582 }
3583 #endif
3584
3585 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3586 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3587 assert(k != NULL, "jdk mismatch");
3588 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3589 }
3590
3591 #if INCLUDE_CDS
3592 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3593 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3594 }
3595 #endif
3596
3597 #define LAMBDAFORM_FIELDS_DO(macro) \
3598 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3599
3600 void java_lang_invoke_LambdaForm::compute_offsets() {
3601 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3602 assert (k != NULL, "jdk mismatch");
3603 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3604 }
3605
3606 #if INCLUDE_CDS
3607 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3608 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3609 }
3610 #endif
3611
3612 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3613 return obj != NULL && is_subclass(obj->klass());
3614 }
3615
3616
3617 oop java_lang_invoke_MethodHandle::type(oop mh) {
3618 return mh->obj_field(_type_offset);
3619 }
3620
3621 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3622 mh->obj_field_put(_type_offset, mtype);
3623 }
3624
3625 oop java_lang_invoke_MethodHandle::form(oop mh) {
3626 assert(_form_offset != 0, "");
3627 return mh->obj_field(_form_offset);
3628 }
3629
3630 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3631 assert(_form_offset != 0, "");
3632 mh->obj_field_put(_form_offset, lform);
3633 }
3634
3635 /// MemberName accessors
3636
3637 oop java_lang_invoke_MemberName::clazz(oop mname) {
3638 assert(is_instance(mname), "wrong type");
3639 return mname->obj_field(_clazz_offset);
3640 }
3641
3642 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3643 assert(is_instance(mname), "wrong type");
3644 mname->obj_field_put(_clazz_offset, clazz);
3645 }
3646
3647 oop java_lang_invoke_MemberName::name(oop mname) {
3648 assert(is_instance(mname), "wrong type");
3649 return mname->obj_field(_name_offset);
3650 }
3651
3652 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3653 assert(is_instance(mname), "wrong type");
3654 mname->obj_field_put(_name_offset, name);
3655 }
3656
3657 oop java_lang_invoke_MemberName::type(oop mname) {
3658 assert(is_instance(mname), "wrong type");
3659 return mname->obj_field(_type_offset);
3660 }
3661
3662 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3663 assert(is_instance(mname), "wrong type");
3664 mname->obj_field_put(_type_offset, type);
3665 }
3666
3667 int java_lang_invoke_MemberName::flags(oop mname) {
3668 assert(is_instance(mname), "wrong type");
3669 return mname->int_field(_flags_offset);
3670 }
3671
3672 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3673 assert(is_instance(mname), "wrong type");
3674 mname->int_field_put(_flags_offset, flags);
3675 }
3676
3677
3678 // Return vmtarget from ResolvedMethodName method field through indirection
3679 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3680 assert(is_instance(mname), "wrong type");
3681 oop method = mname->obj_field(_method_offset);
3682 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3683 }
3684
3685 bool java_lang_invoke_MemberName::is_method(oop mname) {
3686 assert(is_instance(mname), "must be MemberName");
3687 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3688 }
3689
3690 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3691 assert(is_instance(mname), "wrong type");
3692 mname->obj_field_put(_method_offset, resolved_method);
3693 }
3694
3695 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3696 assert(is_instance(mname), "wrong type");
3697 return (intptr_t) mname->address_field(_vmindex_offset);
3698 }
3699
3700 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3701 assert(is_instance(mname), "wrong type");
3702 mname->address_field_put(_vmindex_offset, (address) index);
3703 }
3704
3705
3706 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3707 assert(is_instance(resolved_method), "wrong type");
3708 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3709 assert(m->is_method(), "must be");
3710 return m;
3711 }
3712
3713 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3714 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3715 assert(is_instance(resolved_method), "wrong type");
3716 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3717 }
3718
3719 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3720 assert(is_instance(resolved_method), "wrong type");
3721 resolved_method->obj_field_put(_vmholder_offset, holder);
3722 }
3723
3724 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3725 const Method* method = m();
3726
3727 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3728 oop resolved_method = ResolvedMethodTable::find_method(method);
3729 if (resolved_method != NULL) {
3730 return resolved_method;
3731 }
3732
3733 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3734 if (!k->is_initialized()) {
3735 k->initialize(CHECK_NULL);
3736 }
3737
3738 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3739
3740 NoSafepointVerifier nsv;
3741
3742 if (method->is_old()) {
3743 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3744 method->get_new_method();
3745 }
3746
3747 InstanceKlass* holder = method->method_holder();
3748
3749 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3750 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3751 // distinct loaders) to ensure the metadata is kept alive.
3752 // This mirror may be different than the one in clazz field.
3753 set_vmholder(new_resolved_method, holder->java_mirror());
3754
3755 // Set flag in class to indicate this InstanceKlass has entries in the table
3756 // to avoid walking table during redefinition if none of the redefined classes
3757 // have any membernames in the table.
3758 holder->set_has_resolved_methods();
3759
3760 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3761 }
3762
3763 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3764 assert(is_instance(lform), "wrong type");
3765 return lform->obj_field(_vmentry_offset);
3766 }
3767
3768
3769 // Support for java_lang_invoke_MethodType
3770
3771 int java_lang_invoke_MethodType::_rtype_offset;
3772 int java_lang_invoke_MethodType::_ptypes_offset;
3773
3774 #define METHODTYPE_FIELDS_DO(macro) \
3775 macro(_rtype_offset, k, "rtype", class_signature, false); \
3776 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3777
3778 void java_lang_invoke_MethodType::compute_offsets() {
3779 InstanceKlass* k = SystemDictionary::MethodType_klass();
3780 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3781 }
3782
3783 #if INCLUDE_CDS
3784 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3785 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3786 }
3787 #endif
3788
3789 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3790 st->print("(");
3791 objArrayOop pts = ptypes(mt);
3792 for (int i = 0, limit = pts->length(); i < limit; i++) {
3793 java_lang_Class::print_signature(pts->obj_at(i), st);
3794 }
3795 st->print(")");
3796 java_lang_Class::print_signature(rtype(mt), st);
3797 }
3798
3799 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3800 ResourceMark rm;
3801 stringStream buffer(128);
3802 print_signature(mt, &buffer);
3803 const char* sigstr = buffer.base();
3804 int siglen = (int) buffer.size();
3805 Symbol *name;
3806 if (!intern_if_not_found) {
3807 name = SymbolTable::probe(sigstr, siglen);
3808 } else {
3809 name = SymbolTable::new_symbol(sigstr, siglen);
3810 }
3811 return name;
3812 }
3813
3814 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3815 if (mt1 == mt2)
3816 return true;
3817 if (rtype(mt1) != rtype(mt2))
3818 return false;
3819 if (ptype_count(mt1) != ptype_count(mt2))
3820 return false;
3821 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3822 if (ptype(mt1, i) != ptype(mt2, i))
3823 return false;
3824 }
3825 return true;
3826 }
3827
3828 oop java_lang_invoke_MethodType::rtype(oop mt) {
3829 assert(is_instance(mt), "must be a MethodType");
3830 return mt->obj_field(_rtype_offset);
3831 }
3832
3833 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3834 assert(is_instance(mt), "must be a MethodType");
3835 return (objArrayOop) mt->obj_field(_ptypes_offset);
3836 }
3837
3838 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3839 return ptypes(mt)->obj_at(idx);
3840 }
3841
3842 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3843 return ptypes(mt)->length();
3844 }
3845
3846 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3847 objArrayOop pts = ptypes(mt);
3848 int count = pts->length();
3849 int slots = 0;
3850 for (int i = 0; i < count; i++) {
3851 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3852 slots += type2size[bt];
3853 }
3854 return slots;
3855 }
3856
3857 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3858 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3859 return type2size[bt];
3860 }
3861
3862
3863 // Support for java_lang_invoke_CallSite
3864
3865 int java_lang_invoke_CallSite::_target_offset;
3866 int java_lang_invoke_CallSite::_context_offset;
3867
3868 #define CALLSITE_FIELDS_DO(macro) \
3869 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3870 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3871
3872 void java_lang_invoke_CallSite::compute_offsets() {
3873 InstanceKlass* k = SystemDictionary::CallSite_klass();
3874 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3875 }
3876
3877 #if INCLUDE_CDS
3878 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3879 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3880 }
3881 #endif
3882
3883 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3884 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3885
3886 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3887 return dep_oop;
3888 }
3889
3890 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3891
3892 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3893 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3894
3895 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3896 InstanceKlass* k = SystemDictionary::Context_klass();
3897 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3898 }
3899
3900 #if INCLUDE_CDS
3901 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3902 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3903 }
3904 #endif
3905
3906 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3907 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3908 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3909 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3910 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3911 return dep_ctx;
3912 }
3913
3914 // Support for java_security_AccessControlContext
3915
3916 int java_security_AccessControlContext::_context_offset = 0;
3917 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3918 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3919 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3920
3921 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3922 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3923 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3924 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3925 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3926
3927 void java_security_AccessControlContext::compute_offsets() {
3928 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3929 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3930 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3931 }
3932
3933 #if INCLUDE_CDS
3934 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3935 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3936 }
3937 #endif
3938
3939 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3940 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3941 // Ensure klass is initialized
3942 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3943 // Allocate result
3944 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3945 // Fill in values
3946 result->obj_field_put(_context_offset, context());
3947 result->obj_field_put(_privilegedContext_offset, privileged_context());
3948 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3949 // whitelist AccessControlContexts created by the JVM if present
3950 if (_isAuthorized_offset != -1) {
3951 result->bool_field_put(_isAuthorized_offset, true);
3952 }
3953 return result;
3954 }
3955
3956
3957 // Support for java_lang_ClassLoader
3958
3959 bool java_lang_ClassLoader::offsets_computed = false;
3960 int java_lang_ClassLoader::_loader_data_offset = -1;
3961 int java_lang_ClassLoader::parallelCapable_offset = -1;
3962 int java_lang_ClassLoader::name_offset = -1;
3963 int java_lang_ClassLoader::nameAndId_offset = -1;
3964 int java_lang_ClassLoader::unnamedModule_offset = -1;
3965
3966 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3967 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3968 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3969 }
3970
3971 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3972 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3973 return RawAccess<>::load_at(loader, _loader_data_offset);
3974 }
3975
3976 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3977 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3978 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3979 }
3980
3981 #define CLASSLOADER_FIELDS_DO(macro) \
3982 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
3983 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
3984 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
3985 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
3986 macro(parent_offset, k1, "parent", classloader_signature, false)
3987
3988 void java_lang_ClassLoader::compute_offsets() {
3989 assert(!offsets_computed, "offsets should be initialized only once");
3990 offsets_computed = true;
3991
3992 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3993 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3994
3995 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3996 }
3997
3998 #if INCLUDE_CDS
3999 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4000 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4001 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4002 }
4003 #endif
4004
4005 oop java_lang_ClassLoader::parent(oop loader) {
4006 assert(is_instance(loader), "loader must be oop");
4007 return loader->obj_field(parent_offset);
4008 }
4009
4010 // Returns the name field of this class loader. If the name field has not
4011 // been set, null will be returned.
4012 oop java_lang_ClassLoader::name(oop loader) {
4013 assert(is_instance(loader), "loader must be oop");
4014 return loader->obj_field(name_offset);
4015 }
4016
4017 // Returns the nameAndId field of this class loader. The format is
4018 // as follows:
4019 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4020 // If the defining loader has no name then <qualified-class-name> @<id>
4021 // If built-in loader, then omit '@<id>' as there is only one instance.
4022 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4023 oop java_lang_ClassLoader::nameAndId(oop loader) {
4024 assert(is_instance(loader), "loader must be oop");
4025 return loader->obj_field(nameAndId_offset);
4026 }
4027
4028 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4029 assert(is_instance(loader), "loader must be oop");
4030 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4031 oop acl = loader;
4032 debug_only(jint loop_count = 0);
4033 // This loop taken verbatim from ClassLoader.java:
4034 do {
4035 acl = parent(acl);
4036 if (cl == acl) {
4037 return true;
4038 }
4039 assert(++loop_count > 0, "loop_count overflow");
4040 } while (acl != NULL);
4041 return false;
4042 }
4043
4044 bool java_lang_ClassLoader::is_instance(oop obj) {
4045 return obj != NULL && is_subclass(obj->klass());
4046 }
4047
4048
4049 // For class loader classes, parallelCapable defined
4050 // based on non-null field
4051 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4052 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4053 if (parallelCapable_offset == -1) {
4054 // Default for backward compatibility is false
4055 return false;
4056 }
4057 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4058 }
4059
4060 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4061 // Fix for 4474172; see evaluation for more details
4062 loader = non_reflection_class_loader(loader);
4063
4064 oop cl = SystemDictionary::java_system_loader();
4065 while(cl != NULL) {
4066 if (cl == loader) return true;
4067 cl = parent(cl);
4068 }
4069 return false;
4070 }
4071
4072 // Return true if this is one of the class loaders associated with
4073 // the generated bytecodes for reflection.
4074 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4075 if (loader != NULL) {
4076 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4077 // This might be null in non-1.4 JDKs
4078 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4079 }
4080 return false;
4081 }
4082
4083 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4084 // See whether this is one of the class loaders associated with
4085 // the generated bytecodes for reflection, and if so, "magically"
4086 // delegate to its parent to prevent class loading from occurring
4087 // in places where applications using reflection didn't expect it.
4088 if (is_reflection_class_loader(loader)) {
4089 return parent(loader);
4090 }
4091 return loader;
4092 }
4093
4094 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4095 assert(is_instance(loader), "loader must be oop");
4096 return loader->obj_field(unnamedModule_offset);
4097 }
4098
4099 // Support for java_lang_System
4100 //
4101 #define SYSTEM_FIELDS_DO(macro) \
4102 macro(static_in_offset, k, "in", input_stream_signature, true); \
4103 macro(static_out_offset, k, "out", print_stream_signature, true); \
4104 macro(static_err_offset, k, "err", print_stream_signature, true); \
4105 macro(static_security_offset, k, "security", security_manager_signature, true)
4106
4107 void java_lang_System::compute_offsets() {
4108 InstanceKlass* k = SystemDictionary::System_klass();
4109 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4110 }
4111
4112 #if INCLUDE_CDS
4113 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4114 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4115 }
4116 #endif
4117
4118 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4119 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4120 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4121
4122 // Support for jdk_internal_misc_UnsafeConstants
4123 //
4124 class UnsafeConstantsFixup : public FieldClosure {
4125 private:
4126 int _address_size;
4127 int _page_size;
4128 bool _big_endian;
4129 bool _use_unaligned_access;
4130 int _data_cache_line_flush_size;
4131 public:
4132 UnsafeConstantsFixup() {
4133 // round up values for all static final fields
4134 _address_size = sizeof(void*);
4135 _page_size = os::vm_page_size();
4136 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4137 _use_unaligned_access = UseUnalignedAccesses;
4138 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4139 }
4140
4141 void do_field(fieldDescriptor* fd) {
4142 oop mirror = fd->field_holder()->java_mirror();
4143 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4144 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4145 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4146 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4147 if (fd->name() == vmSymbols::address_size_name()) {
4148 mirror->int_field_put(fd->offset(), _address_size);
4149 } else if (fd->name() == vmSymbols::page_size_name()) {
4150 mirror->int_field_put(fd->offset(), _page_size);
4151 } else if (fd->name() == vmSymbols::big_endian_name()) {
4152 mirror->bool_field_put(fd->offset(), _big_endian);
4153 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4154 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4155 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4156 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4157 } else {
4158 assert(false, "unexpected UnsafeConstants field");
4159 }
4160 }
4161 };
4162
4163 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4164 UnsafeConstantsFixup fixup;
4165 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4166 }
4167
4168 int java_lang_Class::_klass_offset;
4169 int java_lang_Class::_array_klass_offset;
4170 int java_lang_Class::_oop_size_offset;
4171 int java_lang_Class::_static_oop_field_count_offset;
4172 int java_lang_Class::_class_loader_offset;
4173 int java_lang_Class::_module_offset;
4174 int java_lang_Class::_protection_domain_offset;
4175 int java_lang_Class::_component_mirror_offset;
4176 int java_lang_Class::_init_lock_offset;
4177 int java_lang_Class::_signers_offset;
4178 int java_lang_Class::_name_offset;
4179 int java_lang_Class::_source_file_offset;
4180 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4181 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4182 int java_lang_Throwable::backtrace_offset;
4183 int java_lang_Throwable::detailMessage_offset;
4184 int java_lang_Throwable::stackTrace_offset;
4185 int java_lang_Throwable::depth_offset;
4186 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4187 int java_lang_reflect_AccessibleObject::override_offset;
4188 int java_lang_reflect_Method::clazz_offset;
4189 int java_lang_reflect_Method::name_offset;
4190 int java_lang_reflect_Method::returnType_offset;
4191 int java_lang_reflect_Method::parameterTypes_offset;
4192 int java_lang_reflect_Method::exceptionTypes_offset;
4193 int java_lang_reflect_Method::slot_offset;
4194 int java_lang_reflect_Method::modifiers_offset;
4195 int java_lang_reflect_Method::signature_offset;
4196 int java_lang_reflect_Method::annotations_offset;
4197 int java_lang_reflect_Method::parameter_annotations_offset;
4198 int java_lang_reflect_Method::annotation_default_offset;
4199 int java_lang_reflect_Constructor::clazz_offset;
4200 int java_lang_reflect_Constructor::parameterTypes_offset;
4201 int java_lang_reflect_Constructor::exceptionTypes_offset;
4202 int java_lang_reflect_Constructor::slot_offset;
4203 int java_lang_reflect_Constructor::modifiers_offset;
4204 int java_lang_reflect_Constructor::signature_offset;
4205 int java_lang_reflect_Constructor::annotations_offset;
4206 int java_lang_reflect_Constructor::parameter_annotations_offset;
4207 int java_lang_reflect_Field::clazz_offset;
4208 int java_lang_reflect_Field::name_offset;
4209 int java_lang_reflect_Field::type_offset;
4210 int java_lang_reflect_Field::slot_offset;
4211 int java_lang_reflect_Field::modifiers_offset;
4212 int java_lang_reflect_Field::signature_offset;
4213 int java_lang_reflect_Field::annotations_offset;
4214 int java_lang_reflect_Parameter::name_offset;
4215 int java_lang_reflect_Parameter::modifiers_offset;
4216 int java_lang_reflect_Parameter::index_offset;
4217 int java_lang_reflect_Parameter::executable_offset;
4218 int java_lang_boxing_object::value_offset;
4219 int java_lang_boxing_object::long_value_offset;
4220 int java_lang_ref_Reference::referent_offset;
4221 int java_lang_ref_Reference::queue_offset;
4222 int java_lang_ref_Reference::next_offset;
4223 int java_lang_ref_Reference::discovered_offset;
4224 int java_lang_ref_SoftReference::timestamp_offset;
4225 int java_lang_ref_SoftReference::static_clock_offset;
4226 int java_lang_ClassLoader::parent_offset;
4227 int java_lang_System::static_in_offset;
4228 int java_lang_System::static_out_offset;
4229 int java_lang_System::static_err_offset;
4230 int java_lang_System::static_security_offset;
4231 int java_lang_StackTraceElement::methodName_offset;
4232 int java_lang_StackTraceElement::fileName_offset;
4233 int java_lang_StackTraceElement::lineNumber_offset;
4234 int java_lang_StackTraceElement::moduleName_offset;
4235 int java_lang_StackTraceElement::moduleVersion_offset;
4236 int java_lang_StackTraceElement::classLoaderName_offset;
4237 int java_lang_StackTraceElement::declaringClass_offset;
4238 int java_lang_StackTraceElement::declaringClassObject_offset;
4239 int java_lang_StackFrameInfo::_memberName_offset;
4240 int java_lang_StackFrameInfo::_bci_offset;
4241 int java_lang_StackFrameInfo::_version_offset;
4242 int java_lang_LiveStackFrameInfo::_monitors_offset;
4243 int java_lang_LiveStackFrameInfo::_locals_offset;
4244 int java_lang_LiveStackFrameInfo::_operands_offset;
4245 int java_lang_LiveStackFrameInfo::_mode_offset;
4246 int java_lang_AssertionStatusDirectives::classes_offset;
4247 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4248 int java_lang_AssertionStatusDirectives::packages_offset;
4249 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4250 int java_lang_AssertionStatusDirectives::deflt_offset;
4251 int java_nio_Buffer::_limit_offset;
4252 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4253 int reflect_ConstantPool::_oop_offset;
4254 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4255 int java_lang_Integer_IntegerCache::_static_cache_offset;
4256 int java_lang_Long_LongCache::_static_cache_offset;
4257 int java_lang_Character_CharacterCache::_static_cache_offset;
4258 int java_lang_Short_ShortCache::_static_cache_offset;
4259 int java_lang_Byte_ByteCache::_static_cache_offset;
4260 int java_lang_Boolean::_static_TRUE_offset;
4261 int java_lang_Boolean::_static_FALSE_offset;
4262
4263
4264
4265 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4266 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4267 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4268 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4269 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4270 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4271 macro(methodName_offset, k, "methodName", string_signature, false); \
4272 macro(fileName_offset, k, "fileName", string_signature, false); \
4273 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4274
4275 // Support for java_lang_StackTraceElement
4276 void java_lang_StackTraceElement::compute_offsets() {
4277 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4278 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4279 }
4280
4281 #if INCLUDE_CDS
4282 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4283 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4284 }
4285 #endif
4286
4287 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4288 element->obj_field_put(fileName_offset, value);
4289 }
4290
4291 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4292 element->obj_field_put(declaringClass_offset, value);
4293 }
4294
4295 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4296 element->obj_field_put(methodName_offset, value);
4297 }
4298
4299 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4300 element->int_field_put(lineNumber_offset, value);
4301 }
4302
4303 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4304 element->obj_field_put(moduleName_offset, value);
4305 }
4306
4307 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4308 element->obj_field_put(moduleVersion_offset, value);
4309 }
4310
4311 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4312 element->obj_field_put(classLoaderName_offset, value);
4313 }
4314
4315 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4316 element->obj_field_put(declaringClassObject_offset, value);
4317 }
4318
4319 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4320 element->short_field_put(_version_offset, value);
4321 }
4322
4323 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4324 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4325 element->int_field_put(_bci_offset, value);
4326 }
4327
4328 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4329 element->obj_field_put(_monitors_offset, value);
4330 }
4331
4332 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4333 element->obj_field_put(_locals_offset, value);
4334 }
4335
4336 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4337 element->obj_field_put(_operands_offset, value);
4338 }
4339
4340 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4341 element->int_field_put(_mode_offset, value);
4342 }
4343
4344 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4345 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4346 macro(classes_offset, k, "classes", string_array_signature, false); \
4347 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4348 macro(packages_offset, k, "packages", string_array_signature, false); \
4349 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4350 macro(deflt_offset, k, "deflt", bool_signature, false)
4351
4352 void java_lang_AssertionStatusDirectives::compute_offsets() {
4353 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4354 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4355 }
4356
4357 #if INCLUDE_CDS
4358 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4359 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4360 }
4361 #endif
4362
4363 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4364 o->obj_field_put(classes_offset, val);
4365 }
4366
4367 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4368 o->obj_field_put(classEnabled_offset, val);
4369 }
4370
4371 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4372 o->obj_field_put(packages_offset, val);
4373 }
4374
4375 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4376 o->obj_field_put(packageEnabled_offset, val);
4377 }
4378
4379 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4380 o->bool_field_put(deflt_offset, val);
4381 }
4382
4383
4384 // Support for intrinsification of java.nio.Buffer.checkIndex
4385 int java_nio_Buffer::limit_offset() {
4386 return _limit_offset;
4387 }
4388
4389 #define BUFFER_FIELDS_DO(macro) \
4390 macro(_limit_offset, k, "limit", int_signature, false)
4391
4392 void java_nio_Buffer::compute_offsets() {
4393 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4394 assert(k != NULL, "must be loaded in 1.4+");
4395 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4396 }
4397
4398 #if INCLUDE_CDS
4399 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4400 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4401 }
4402 #endif
4403
4404 #define AOS_FIELDS_DO(macro) \
4405 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4406
4407 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4408 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4409 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4410 }
4411
4412 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4413 assert(_owner_offset != 0, "Must be initialized");
4414 return obj->obj_field(_owner_offset);
4415 }
4416
4417 #if INCLUDE_CDS
4418 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4419 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4420 }
4421 #endif
4422
4423 #define INTEGER_CACHE_FIELDS_DO(macro) \
4424 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4425
4426 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4427 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4428 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4429 }
4430
4431 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4432 oop base = ik->static_field_base_raw();
4433 return objArrayOop(base->obj_field(_static_cache_offset));
4434 }
4435
4436 Symbol* java_lang_Integer_IntegerCache::symbol() {
4437 return vmSymbols::java_lang_Integer_IntegerCache();
4438 }
4439
4440 #if INCLUDE_CDS
4441 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4442 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4443 }
4444 #endif
4445 #undef INTEGER_CACHE_FIELDS_DO
4446
4447 jint java_lang_Integer::value(oop obj) {
4448 jvalue v;
4449 java_lang_boxing_object::get_value(obj, &v);
4450 return v.i;
4451 }
4452
4453 #define LONG_CACHE_FIELDS_DO(macro) \
4454 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4455
4456 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4457 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4458 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4459 }
4460
4461 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4462 oop base = ik->static_field_base_raw();
4463 return objArrayOop(base->obj_field(_static_cache_offset));
4464 }
4465
4466 Symbol* java_lang_Long_LongCache::symbol() {
4467 return vmSymbols::java_lang_Long_LongCache();
4468 }
4469
4470 #if INCLUDE_CDS
4471 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4472 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4473 }
4474 #endif
4475 #undef LONG_CACHE_FIELDS_DO
4476
4477 jlong java_lang_Long::value(oop obj) {
4478 jvalue v;
4479 java_lang_boxing_object::get_value(obj, &v);
4480 return v.j;
4481 }
4482
4483 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4484 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4485
4486 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4487 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4488 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4489 }
4490
4491 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4492 oop base = ik->static_field_base_raw();
4493 return objArrayOop(base->obj_field(_static_cache_offset));
4494 }
4495
4496 Symbol* java_lang_Character_CharacterCache::symbol() {
4497 return vmSymbols::java_lang_Character_CharacterCache();
4498 }
4499
4500 #if INCLUDE_CDS
4501 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4502 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4503 }
4504 #endif
4505 #undef CHARACTER_CACHE_FIELDS_DO
4506
4507 jchar java_lang_Character::value(oop obj) {
4508 jvalue v;
4509 java_lang_boxing_object::get_value(obj, &v);
4510 return v.c;
4511 }
4512
4513 #define SHORT_CACHE_FIELDS_DO(macro) \
4514 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4515
4516 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4517 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4518 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4519 }
4520
4521 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4522 oop base = ik->static_field_base_raw();
4523 return objArrayOop(base->obj_field(_static_cache_offset));
4524 }
4525
4526 Symbol* java_lang_Short_ShortCache::symbol() {
4527 return vmSymbols::java_lang_Short_ShortCache();
4528 }
4529
4530 #if INCLUDE_CDS
4531 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4532 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4533 }
4534 #endif
4535 #undef SHORT_CACHE_FIELDS_DO
4536
4537 jshort java_lang_Short::value(oop obj) {
4538 jvalue v;
4539 java_lang_boxing_object::get_value(obj, &v);
4540 return v.s;
4541 }
4542
4543 #define BYTE_CACHE_FIELDS_DO(macro) \
4544 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4545
4546 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4547 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4548 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4549 }
4550
4551 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4552 oop base = ik->static_field_base_raw();
4553 return objArrayOop(base->obj_field(_static_cache_offset));
4554 }
4555
4556 Symbol* java_lang_Byte_ByteCache::symbol() {
4557 return vmSymbols::java_lang_Byte_ByteCache();
4558 }
4559
4560 #if INCLUDE_CDS
4561 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4562 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4563 }
4564 #endif
4565 #undef BYTE_CACHE_FIELDS_DO
4566
4567 jbyte java_lang_Byte::value(oop obj) {
4568 jvalue v;
4569 java_lang_boxing_object::get_value(obj, &v);
4570 return v.b;
4571 }
4572 #define BOOLEAN_FIELDS_DO(macro) \
4573 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4574 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4575
4576
4577 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4578 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4579 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4580 }
4581
4582 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4583 oop base = ik->static_field_base_raw();
4584 return base->obj_field(_static_TRUE_offset);
4585 }
4586
4587 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4588 oop base = ik->static_field_base_raw();
4589 return base->obj_field(_static_FALSE_offset);
4590 }
4591
4592 Symbol* java_lang_Boolean::symbol() {
4593 return vmSymbols::java_lang_Boolean();
4594 }
4595
4596 #if INCLUDE_CDS
4597 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4598 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4599 }
4600 #endif
4601 #undef BOOLEAN_CACHE_FIELDS_DO
4602
4603 jboolean java_lang_Boolean::value(oop obj) {
4604 jvalue v;
4605 java_lang_boxing_object::get_value(obj, &v);
4606 return v.z;
4607 }
4608
4609 static int member_offset(int hardcoded_offset) {
4610 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4611 }
4612
4613 // Compute hard-coded offsets
4614 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4615 // are not available to determine the offset_of_static_fields.
4616 void JavaClasses::compute_hard_coded_offsets() {
4617
4618 // java_lang_boxing_object
4619 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4620 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4621
4622 // java_lang_ref_Reference
4623 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4624 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4625 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4626 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4627 }
4628
4629 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4630
4631 // Compute non-hard-coded field offsets of all the classes in this file
4632 void JavaClasses::compute_offsets() {
4633 if (UseSharedSpaces) {
4634 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4635 JvmtiExport::has_early_class_hook_env()),
4636 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4637 // None of the classes used by the rest of this function can be replaced by
4638 // JMVTI ClassFileLoadHook.
4639 // We are safe to use the archived offsets, which have already been restored
4640 // by JavaClasses::serialize_offsets, without computing the offsets again.
4641 return;
4642 }
4643
4644 // We have already called the compute_offsets() of the
4645 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4646 // earlier inside SystemDictionary::resolve_well_known_classes()
4647 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4648 }
4649
4650 #if INCLUDE_CDS
4651 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4652
4653 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4654 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4655 }
4656 #endif
4657
4658
4659 #ifndef PRODUCT
4660
4661 // These functions exist to assert the validity of hard-coded field offsets to guard
4662 // against changes in the class files
4663
4664 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4665 EXCEPTION_MARK;
4666 fieldDescriptor fd;
4667 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4668 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4669 InstanceKlass* ik = InstanceKlass::cast(k);
4670 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4671 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4672 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4673 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4674 return false;
4675 }
4676 if (fd.is_static()) {
4677 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4678 return false;
4679 }
4680 if (fd.offset() == hardcoded_offset ) {
4681 return true;
4682 } else {
4683 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4684 klass_name, field_name, hardcoded_offset, fd.offset());
4685 return false;
4686 }
4687 }
4688
4689 // Check the hard-coded field offsets of all the classes in this file
4690
4691 void JavaClasses::check_offsets() {
4692 bool valid = true;
4693
4694 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4695 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4696
4697 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4698 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4699
4700 // Boxed primitive objects (java_lang_boxing_object)
4701
4702 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4703 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4704 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4705 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4706 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4707 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4708 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4709 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4710
4711 // java.lang.ref.Reference
4712
4713 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4714 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4715 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4716 // Fake field
4717 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4718
4719 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4720 }
4721
4722 #endif // PRODUCT
4723
4724 int InjectedField::compute_offset() {
4725 InstanceKlass* ik = InstanceKlass::cast(klass());
4726 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4727 if (!may_be_java && !fs.access_flags().is_internal()) {
4728 // Only look at injected fields
4729 continue;
4730 }
4731 if (fs.name() == name() && fs.signature() == signature()) {
4732 return fs.offset();
4733 }
4734 }
4735 ResourceMark rm;
4736 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)" : "");
4737 #ifndef PRODUCT
4738 ik->print();
4739 tty->print_cr("all fields:");
4740 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4741 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4742 }
4743 #endif //PRODUCT
4744 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4745 return -1;
4746 }
4747
4748 void javaClasses_init() {
4749 JavaClasses::compute_offsets();
4750 JavaClasses::check_offsets();
4751 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4752 }