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.inline.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(), Handle(), CHECK);
855 }
856
857 void java_lang_Class::initialize_mirror_fields(Klass* k,
858 Handle mirror,
859 Handle protection_domain,
860 Handle classData,
861 TRAPS) {
862 // Allocate a simple java object for a lock.
863 // This needs to be a java object because during class initialization
864 // it can be held across a java call.
865 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
866 set_init_lock(mirror(), r);
867
868 // Set protection domain also
869 set_protection_domain(mirror(), protection_domain());
870
871 // Initialize static fields
872 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
873
874 // Set classData
875 set_class_data(mirror(), classData());
876 }
877
878 // Set the java.lang.Module module field in the java_lang_Class mirror
879 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
880 if (module.is_null()) {
881 // During startup, the module may be NULL only if java.base has not been defined yet.
882 // Put the class on the fixup_module_list to patch later when the java.lang.Module
883 // for java.base is known. But note that since we captured the NULL module another
884 // thread may have completed that initialization.
885
886 bool javabase_was_defined = false;
887 {
888 MutexLocker m1(Module_lock, THREAD);
889 // Keep list of classes needing java.base module fixup
890 if (!ModuleEntryTable::javabase_defined()) {
891 assert(k->java_mirror() != NULL, "Class's mirror is null");
892 k->class_loader_data()->inc_keep_alive();
893 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
894 fixup_module_field_list()->push(k);
895 } else {
896 javabase_was_defined = true;
897 }
898 }
899
900 // If java.base was already defined then patch this particular class with java.base.
901 if (javabase_was_defined) {
902 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
903 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
904 "Setting class module field, " JAVA_BASE_NAME " should be defined");
905 Handle javabase_handle(THREAD, javabase_entry->module());
906 set_module(mirror(), javabase_handle());
907 }
908 } else {
909 assert(Universe::is_module_initialized() ||
910 (ModuleEntryTable::javabase_defined() &&
911 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
912 "Incorrect java.lang.Module specification while creating mirror");
913 set_module(mirror(), module());
914 }
915 }
916
917 // Statically allocate fixup lists because they always get created.
918 void java_lang_Class::allocate_fixup_lists() {
919 GrowableArray<Klass*>* mirror_list =
920 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
921 set_fixup_mirror_list(mirror_list);
922
923 GrowableArray<Klass*>* module_list =
924 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
925 set_fixup_module_field_list(module_list);
926 }
927
928 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
929 Handle module, Handle protection_domain,
930 Handle classData, TRAPS) {
931 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
932 assert(k->java_mirror() == NULL, "should only assign mirror once");
933
934 // Use this moment of initialization to cache modifier_flags also,
935 // to support Class.getModifiers(). Instance classes recalculate
936 // the cached flags after the class file is parsed, but before the
937 // class is put into the system dictionary.
938 int computed_modifiers = k->compute_modifier_flags(CHECK);
939 k->set_modifier_flags(computed_modifiers);
940 // Class_klass has to be loaded because it is used to allocate
941 // the mirror.
942 if (SystemDictionary::Class_klass_loaded()) {
943 // Allocate mirror (java.lang.Class instance)
944 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
945 Handle mirror(THREAD, mirror_oop);
946 Handle comp_mirror;
947
948 // Setup indirection from mirror->klass
949 java_lang_Class::set_klass(mirror(), k);
950
951 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
952 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
953
954 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
955
956 // It might also have a component mirror. This mirror must already exist.
957 if (k->is_array_klass()) {
958 if (k->is_typeArray_klass()) {
959 BasicType type = TypeArrayKlass::cast(k)->element_type();
960 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
961 } else {
962 assert(k->is_objArray_klass(), "Must be");
963 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
964 assert(element_klass != NULL, "Must have an element klass");
965 comp_mirror = Handle(THREAD, element_klass->java_mirror());
966 }
967 assert(comp_mirror() != NULL, "must have a mirror");
968
969 // Two-way link between the array klass and its component mirror:
970 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
971 set_component_mirror(mirror(), comp_mirror());
972 // See below for ordering dependencies between field array_klass in component mirror
973 // and java_mirror in this klass.
974 } else {
975 assert(k->is_instance_klass(), "Must be");
976
977 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
978 if (HAS_PENDING_EXCEPTION) {
979 // If any of the fields throws an exception like OOM remove the klass field
980 // from the mirror so GC doesn't follow it after the klass has been deallocated.
981 // This mirror looks like a primitive type, which logically it is because it
982 // it represents no class.
983 java_lang_Class::set_klass(mirror(), NULL);
984 return;
985 }
986 }
987
988 // set the classLoader field in the java_lang_Class instance
989 assert(class_loader() == k->class_loader(), "should be same");
990 set_class_loader(mirror(), class_loader());
991
992 // Setup indirection from klass->mirror
993 // after any exceptions can happen during allocations.
994 k->set_java_mirror(mirror);
995
996 // Set the module field in the java_lang_Class instance. This must be done
997 // after the mirror is set.
998 set_mirror_module_field(k, mirror, module, THREAD);
999
1000 if (comp_mirror() != NULL) {
1001 // Set after k->java_mirror() is published, because compiled code running
1002 // concurrently doesn't expect a k to have a null java_mirror.
1003 release_set_array_klass(comp_mirror(), k);
1004 }
1005 } else {
1006 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1007 fixup_mirror_list()->push(k);
1008 }
1009 }
1010
1011 #if INCLUDE_CDS_JAVA_HEAP
1012 // Clears mirror fields. Static final fields with initial values are reloaded
1013 // from constant pool. The object identity hash is in the object header and is
1014 // not affected.
1015 class ResetMirrorField: public FieldClosure {
1016 private:
1017 Handle _m;
1018
1019 public:
1020 ResetMirrorField(Handle mirror) : _m(mirror) {}
1021
1022 void do_field(fieldDescriptor* fd) {
1023 assert(DumpSharedSpaces, "dump time only");
1024 assert(_m.not_null(), "Mirror cannot be NULL");
1025
1026 if (fd->is_static() && fd->has_initial_value()) {
1027 initialize_static_field(fd, _m, Thread::current());
1028 return;
1029 }
1030
1031 BasicType ft = fd->field_type();
1032 switch (ft) {
1033 case T_BYTE:
1034 _m()->byte_field_put(fd->offset(), 0);
1035 break;
1036 case T_CHAR:
1037 _m()->char_field_put(fd->offset(), 0);
1038 break;
1039 case T_DOUBLE:
1040 _m()->double_field_put(fd->offset(), 0);
1041 break;
1042 case T_FLOAT:
1043 _m()->float_field_put(fd->offset(), 0);
1044 break;
1045 case T_INT:
1046 _m()->int_field_put(fd->offset(), 0);
1047 break;
1048 case T_LONG:
1049 _m()->long_field_put(fd->offset(), 0);
1050 break;
1051 case T_SHORT:
1052 _m()->short_field_put(fd->offset(), 0);
1053 break;
1054 case T_BOOLEAN:
1055 _m()->bool_field_put(fd->offset(), false);
1056 break;
1057 case T_ARRAY:
1058 case T_OBJECT: {
1059 // It might be useful to cache the String field, but
1060 // for now just clear out any reference field
1061 oop o = _m()->obj_field(fd->offset());
1062 _m()->obj_field_put(fd->offset(), NULL);
1063 break;
1064 }
1065 default:
1066 ShouldNotReachHere();
1067 break;
1068 }
1069 }
1070 };
1071
1072 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1073 assert(HeapShared::is_heap_object_archiving_allowed(),
1074 "HeapShared::is_heap_object_archiving_allowed() must be true");
1075
1076 for (int t = 0; t <= T_VOID; t++) {
1077 oop m = Universe::_mirrors[t];
1078 if (m != NULL) {
1079 // Update the field at _array_klass_offset to point to the relocated array klass.
1080 oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1081 assert(archived_m != NULL, "sanity");
1082 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1083 assert(ak != NULL || t == T_VOID, "should not be NULL");
1084 if (ak != NULL) {
1085 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true);
1086 archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1087 }
1088
1089 // Clear the fields. Just to be safe
1090 Klass *k = m->klass();
1091 Handle archived_mirror_h(THREAD, archived_m);
1092 ResetMirrorField reset(archived_mirror_h);
1093 InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1094
1095 log_trace(cds, heap, mirror)(
1096 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1097 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1098
1099 Universe::_mirrors[t] = archived_m;
1100 }
1101 }
1102
1103 assert(Universe::_mirrors[T_INT] != NULL &&
1104 Universe::_mirrors[T_FLOAT] != NULL &&
1105 Universe::_mirrors[T_DOUBLE] != NULL &&
1106 Universe::_mirrors[T_BYTE] != NULL &&
1107 Universe::_mirrors[T_BOOLEAN] != NULL &&
1108 Universe::_mirrors[T_CHAR] != NULL &&
1109 Universe::_mirrors[T_LONG] != NULL &&
1110 Universe::_mirrors[T_SHORT] != NULL &&
1111 Universe::_mirrors[T_VOID] != NULL, "sanity");
1112
1113 Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1114 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1115 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1116 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1117 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1118 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1119 Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1120 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1121 Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1122 }
1123
1124 //
1125 // After the mirror object is successfully archived, the archived
1126 // klass is set with _has_archived_raw_mirror flag.
1127 //
1128 // The _has_archived_raw_mirror flag is cleared at runtime when the
1129 // archived mirror is restored. If archived java heap data cannot
1130 // be used at runtime, new mirror object is created for the shared
1131 // class. The _has_archived_raw_mirror is cleared also during the process.
1132 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1133 assert(HeapShared::is_heap_object_archiving_allowed(),
1134 "HeapShared::is_heap_object_archiving_allowed() must be true");
1135
1136 // Mirror is already archived
1137 if (k->has_raw_archived_mirror()) {
1138 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1139 return k->archived_java_mirror_raw();
1140 }
1141
1142 // No mirror
1143 oop mirror = k->java_mirror();
1144 if (mirror == NULL) {
1145 return NULL;
1146 }
1147
1148 if (k->is_instance_klass()) {
1149 InstanceKlass *ik = InstanceKlass::cast(k);
1150 assert(ik->signers() == NULL, "class with signer should have been excluded");
1151
1152 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1153 ik->is_shared_app_class())) {
1154 // Archiving mirror for classes from non-builtin loaders is not
1155 // supported. Clear the _java_mirror within the archived class.
1156 k->set_java_mirror_handle(NULL);
1157 return NULL;
1158 }
1159 }
1160
1161 // Now start archiving the mirror object
1162 oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1163 if (archived_mirror == NULL) {
1164 return NULL;
1165 }
1166
1167 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1168 if (archived_mirror == NULL) {
1169 return NULL;
1170 }
1171
1172 k->set_archived_java_mirror_raw(archived_mirror);
1173
1174 k->set_has_raw_archived_mirror();
1175
1176 ResourceMark rm;
1177 log_trace(cds, heap, mirror)(
1178 "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1179 k->external_name(), p2i(mirror), p2i(archived_mirror));
1180
1181 return archived_mirror;
1182 }
1183
1184 // The process is based on create_mirror().
1185 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1186 oop archived_mirror,
1187 Thread *THREAD) {
1188 // Clear nonstatic fields in archived mirror. Some of the fields will be set
1189 // to archived metadata and objects below.
1190 Klass *c = archived_mirror->klass();
1191 Handle archived_mirror_h(THREAD, archived_mirror);
1192 ResetMirrorField reset(archived_mirror_h);
1193 InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1194
1195 if (k->is_array_klass()) {
1196 oop archived_comp_mirror;
1197 if (k->is_typeArray_klass()) {
1198 // The primitive type mirrors are already archived. Get the archived mirror.
1199 oop comp_mirror = java_lang_Class::component_mirror(mirror);
1200 archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1201 assert(archived_comp_mirror != NULL, "Must be");
1202 } else {
1203 assert(k->is_objArray_klass(), "Must be");
1204 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1205 assert(element_klass != NULL, "Must have an element klass");
1206 archived_comp_mirror = archive_mirror(element_klass, THREAD);
1207 if (archived_comp_mirror == NULL) {
1208 return NULL;
1209 }
1210 }
1211 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1212 } else {
1213 assert(k->is_instance_klass(), "Must be");
1214
1215 // Reset local static fields in the mirror
1216 InstanceKlass::cast(k)->do_local_static_fields(&reset);
1217
1218 java_lang_Class:set_init_lock(archived_mirror, NULL);
1219
1220 set_protection_domain(archived_mirror, NULL);
1221 }
1222
1223 // clear class loader and mirror_module_field
1224 set_class_loader(archived_mirror, NULL);
1225 set_module(archived_mirror, NULL);
1226
1227 // The archived mirror's field at _klass_offset is still pointing to the original
1228 // klass. Updated the field in the archived mirror to point to the relocated
1229 // klass in the archive.
1230 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true);
1231 log_debug(cds, heap, mirror)(
1232 "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1233 p2i(as_Klass(mirror)), p2i(reloc_k));
1234 archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1235
1236 // The field at _array_klass_offset is pointing to the original one dimension
1237 // higher array klass if exists. Relocate the pointer.
1238 Klass *arr = array_klass_acquire(mirror);
1239 if (arr != NULL) {
1240 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true);
1241 log_debug(cds, heap, mirror)(
1242 "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1243 p2i(arr), p2i(reloc_arr));
1244 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1245 }
1246 return archived_mirror;
1247 }
1248
1249 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) {
1250 if (MetaspaceShared::relocation_delta() != 0) {
1251 assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class");
1252
1253 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1254 if (ak != NULL) {
1255 archived_mirror->metadata_field_put(_array_klass_offset,
1256 (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1257 }
1258 }
1259 }
1260
1261 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) {
1262 if (MetaspaceShared::relocation_delta() != 0) {
1263 Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset));
1264 archived_mirror->metadata_field_put(_klass_offset,
1265 (Klass*)(address(k) + MetaspaceShared::relocation_delta()));
1266
1267 Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1268 if (ak != NULL) {
1269 archived_mirror->metadata_field_put(_array_klass_offset,
1270 (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1271 }
1272 }
1273 }
1274
1275
1276 // Returns true if the mirror is updated, false if no archived mirror
1277 // data is present. After the archived mirror object is restored, the
1278 // shared klass' _has_raw_archived_mirror flag is cleared.
1279 bool java_lang_Class::restore_archived_mirror(Klass *k,
1280 Handle class_loader, Handle module,
1281 Handle protection_domain, TRAPS) {
1282 // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1283 // see more details in SystemDictionary::resolve_well_known_classes().
1284 if (!SystemDictionary::Class_klass_loaded()) {
1285 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1286 fixup_mirror_list()->push(k);
1287 return true;
1288 }
1289
1290 oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1291 if (m == NULL) {
1292 return false;
1293 }
1294
1295 // mirror is archived, restore
1296 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1297 assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1298 update_archived_mirror_native_pointers(m);
1299 assert(as_Klass(m) == k, "must be");
1300 Handle mirror(THREAD, m);
1301
1302 if (!k->is_array_klass()) {
1303 // - local static final fields with initial values were initialized at dump time
1304
1305 // create the init_lock
1306 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1307 set_init_lock(mirror(), r);
1308
1309 if (protection_domain.not_null()) {
1310 set_protection_domain(mirror(), protection_domain());
1311 }
1312 }
1313
1314 assert(class_loader() == k->class_loader(), "should be same");
1315 if (class_loader.not_null()) {
1316 set_class_loader(mirror(), class_loader());
1317 }
1318
1319 k->set_java_mirror(mirror);
1320 k->clear_has_raw_archived_mirror();
1321
1322 set_mirror_module_field(k, mirror, module, THREAD);
1323
1324 ResourceMark rm;
1325 log_trace(cds, heap, mirror)(
1326 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1327
1328 return true;
1329 }
1330 #endif // INCLUDE_CDS_JAVA_HEAP
1331
1332 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1333 assert(_module_offset != 0, "must have been computed already");
1334 java_lang_Class::set_module(k->java_mirror(), module());
1335 }
1336
1337 int java_lang_Class::oop_size(oop java_class) {
1338 assert(_oop_size_offset != 0, "must be set");
1339 int size = java_class->int_field(_oop_size_offset);
1340 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1341 return size;
1342 }
1343
1344
1345 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1346 assert(_oop_size_offset != 0, "must be set");
1347 assert(size > 0, "Oop size must be greater than zero, not %d", size);
1348 *(int*)(((char*)java_class) + _oop_size_offset) = size;
1349 }
1350
1351 int java_lang_Class::static_oop_field_count(oop java_class) {
1352 assert(_static_oop_field_count_offset != 0, "must be set");
1353 return java_class->int_field(_static_oop_field_count_offset);
1354 }
1355
1356 int java_lang_Class::static_oop_field_count_raw(oop java_class) {
1357 assert(_static_oop_field_count_offset != 0, "must be set");
1358 return java_class->int_field_raw(_static_oop_field_count_offset);
1359 }
1360
1361 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1362 assert(_static_oop_field_count_offset != 0, "must be set");
1363 java_class->int_field_put(_static_oop_field_count_offset, size);
1364 }
1365
1366 oop java_lang_Class::protection_domain(oop java_class) {
1367 assert(_protection_domain_offset != 0, "must be set");
1368 return java_class->obj_field(_protection_domain_offset);
1369 }
1370 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1371 assert(_protection_domain_offset != 0, "must be set");
1372 java_class->obj_field_put(_protection_domain_offset, pd);
1373 }
1374
1375 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1376 assert(_component_mirror_offset != 0, "must be set");
1377 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1378 }
1379 oop java_lang_Class::component_mirror(oop java_class) {
1380 assert(_component_mirror_offset != 0, "must be set");
1381 return java_class->obj_field(_component_mirror_offset);
1382 }
1383
1384 oop java_lang_Class::init_lock(oop java_class) {
1385 assert(_init_lock_offset != 0, "must be set");
1386 return java_class->obj_field(_init_lock_offset);
1387 }
1388 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1389 assert(_init_lock_offset != 0, "must be set");
1390 java_class->obj_field_put(_init_lock_offset, init_lock);
1391 }
1392
1393 objArrayOop java_lang_Class::signers(oop java_class) {
1394 assert(_signers_offset != 0, "must be set");
1395 return (objArrayOop)java_class->obj_field(_signers_offset);
1396 }
1397 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1398 assert(_signers_offset != 0, "must be set");
1399 java_class->obj_field_put(_signers_offset, (oop)signers);
1400 }
1401
1402 oop java_lang_Class::class_data(oop java_class) {
1403 assert(_classData_offset != 0, "must be set");
1404 return java_class->obj_field(_classData_offset);
1405 }
1406 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1407 assert(_classData_offset != 0, "must be set");
1408 java_class->obj_field_put(_classData_offset, class_data);
1409 }
1410
1411
1412 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1413 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1414 if (_class_loader_offset != 0) {
1415 java_class->obj_field_put(_class_loader_offset, loader);
1416 }
1417 }
1418
1419 oop java_lang_Class::class_loader(oop java_class) {
1420 assert(_class_loader_offset != 0, "must be set");
1421 return java_class->obj_field(_class_loader_offset);
1422 }
1423
1424 oop java_lang_Class::module(oop java_class) {
1425 assert(_module_offset != 0, "must be set");
1426 return java_class->obj_field(_module_offset);
1427 }
1428
1429 void java_lang_Class::set_module(oop java_class, oop module) {
1430 assert(_module_offset != 0, "must be set");
1431 java_class->obj_field_put(_module_offset, module);
1432 }
1433
1434 oop java_lang_Class::name(Handle java_class, TRAPS) {
1435 assert(_name_offset != 0, "must be set");
1436 oop o = java_class->obj_field(_name_offset);
1437 if (o == NULL) {
1438 o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1439 java_class->obj_field_put(_name_offset, o);
1440 }
1441 return o;
1442 }
1443
1444 oop java_lang_Class::source_file(oop java_class) {
1445 assert(_source_file_offset != 0, "must be set");
1446 return java_class->obj_field(_source_file_offset);
1447 }
1448
1449 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1450 assert(_source_file_offset != 0, "must be set");
1451 java_class->obj_field_put(_source_file_offset, source_file);
1452 }
1453
1454 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1455 // This should be improved by adding a field at the Java level or by
1456 // introducing a new VM klass (see comment in ClassFileParser)
1457 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1458 if (type != T_VOID) {
1459 Klass* aklass = Universe::typeArrayKlassObj(type);
1460 assert(aklass != NULL, "correct bootstrap");
1461 release_set_array_klass(java_class, aklass);
1462 }
1463 #ifdef ASSERT
1464 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1465 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1466 #endif
1467 return java_class;
1468 }
1469
1470
1471 Klass* java_lang_Class::as_Klass(oop java_class) {
1472 //%note memory_2
1473 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1474 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1475 assert(k == NULL || k->is_klass(), "type check");
1476 return k;
1477 }
1478
1479 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1480 //%note memory_2
1481 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1482 Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1483 assert(k == NULL || k->is_klass(), "type check");
1484 return k;
1485 }
1486
1487
1488 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1489 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1490 java_class->metadata_field_put(_klass_offset, klass);
1491 }
1492
1493
1494 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1495 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1496 Symbol* name = NULL;
1497 bool is_instance = false;
1498 if (is_primitive(java_class)) {
1499 name = vmSymbols::type_signature(primitive_type(java_class));
1500 } else {
1501 Klass* k = as_Klass(java_class);
1502 is_instance = k->is_instance_klass();
1503 name = k->name();
1504 }
1505 if (name == NULL) {
1506 st->print("<null>");
1507 return;
1508 }
1509 if (is_instance) st->print("L");
1510 st->write((char*) name->base(), (int) name->utf8_length());
1511 if (is_instance) st->print(";");
1512 }
1513
1514 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1515 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1516 Symbol* name;
1517 if (is_primitive(java_class)) {
1518 name = vmSymbols::type_signature(primitive_type(java_class));
1519 // Because this can create a new symbol, the caller has to decrement
1520 // the refcount, so make adjustment here and below for symbols returned
1521 // that are not created or incremented due to a successful lookup.
1522 name->increment_refcount();
1523 } else {
1524 Klass* k = as_Klass(java_class);
1525 if (!k->is_instance_klass()) {
1526 name = k->name();
1527 name->increment_refcount();
1528 } else {
1529 ResourceMark rm;
1530 const char* sigstr = k->signature_name();
1531 int siglen = (int) strlen(sigstr);
1532 if (!intern_if_not_found) {
1533 name = SymbolTable::probe(sigstr, siglen);
1534 } else {
1535 name = SymbolTable::new_symbol(sigstr, siglen);
1536 }
1537 }
1538 }
1539 return name;
1540 }
1541
1542 // Returns the Java name for this Java mirror (Resource allocated)
1543 // See Klass::external_name().
1544 // For primitive type Java mirrors, its type name is returned.
1545 const char* java_lang_Class::as_external_name(oop java_class) {
1546 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1547 const char* name = NULL;
1548 if (is_primitive(java_class)) {
1549 name = type2name(primitive_type(java_class));
1550 } else {
1551 name = as_Klass(java_class)->external_name();
1552 }
1553 if (name == NULL) {
1554 name = "<null>";
1555 }
1556 return name;
1557 }
1558
1559 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1560 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1561 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1562 return k;
1563 }
1564
1565
1566 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1567 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1568 java_class->release_metadata_field_put(_array_klass_offset, klass);
1569 }
1570
1571
1572 BasicType java_lang_Class::primitive_type(oop java_class) {
1573 assert(java_lang_Class::is_primitive(java_class), "just checking");
1574 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1575 BasicType type = T_VOID;
1576 if (ak != NULL) {
1577 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1578 type = ArrayKlass::cast(ak)->element_type();
1579 } else {
1580 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1581 }
1582 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1583 return type;
1584 }
1585
1586 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1587 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1588 if (is_primitive(java_class)) {
1589 if (reference_klass != NULL)
1590 (*reference_klass) = NULL;
1591 return primitive_type(java_class);
1592 } else {
1593 if (reference_klass != NULL)
1594 (*reference_klass) = as_Klass(java_class);
1595 return T_OBJECT;
1596 }
1597 }
1598
1599
1600 oop java_lang_Class::primitive_mirror(BasicType t) {
1601 oop mirror = Universe::java_mirror(t);
1602 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1603 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1604 return mirror;
1605 }
1606
1607 bool java_lang_Class::offsets_computed = false;
1608 int java_lang_Class::classRedefinedCount_offset = -1;
1609
1610 #define CLASS_FIELDS_DO(macro) \
1611 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \
1612 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \
1613 macro(_component_mirror_offset, k, "componentType", class_signature, false); \
1614 macro(_module_offset, k, "module", module_signature, false); \
1615 macro(_name_offset, k, "name", string_signature, false); \
1616
1617 void java_lang_Class::compute_offsets() {
1618 if (offsets_computed) {
1619 return;
1620 }
1621
1622 offsets_computed = true;
1623
1624 InstanceKlass* k = SystemDictionary::Class_klass();
1625 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1626
1627 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1628 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1629 // GC treats them the same.
1630 _init_lock_offset = _component_mirror_offset;
1631
1632 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1633 }
1634
1635 #if INCLUDE_CDS
1636 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1637 f->do_bool(&offsets_computed);
1638 f->do_u4((u4*)&_init_lock_offset);
1639
1640 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1641
1642 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1643 }
1644 #endif
1645
1646 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1647 if (classRedefinedCount_offset == -1) {
1648 // If we don't have an offset for it then just return -1 as a marker.
1649 return -1;
1650 }
1651
1652 return the_class_mirror->int_field(classRedefinedCount_offset);
1653 }
1654
1655 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1656 if (classRedefinedCount_offset == -1) {
1657 // If we don't have an offset for it then nothing to set.
1658 return;
1659 }
1660
1661 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1662 }
1663
1664
1665 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1666 // platform thread structure, and a eetop offset which was used for thread
1667 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1668 // merged, so in the HotSpot VM we just use the eetop field for the thread
1669 // instead of the privateInfo_offset.
1670 //
1671 // Note: The stackSize field is only present starting in 1.4.
1672
1673 int java_lang_Thread::_name_offset = 0;
1674 int java_lang_Thread::_group_offset = 0;
1675 int java_lang_Thread::_contextClassLoader_offset = 0;
1676 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1677 int java_lang_Thread::_priority_offset = 0;
1678 int java_lang_Thread::_eetop_offset = 0;
1679 int java_lang_Thread::_interrupted_offset = 0;
1680 int java_lang_Thread::_daemon_offset = 0;
1681 int java_lang_Thread::_stillborn_offset = 0;
1682 int java_lang_Thread::_stackSize_offset = 0;
1683 int java_lang_Thread::_tid_offset = 0;
1684 int java_lang_Thread::_thread_status_offset = 0;
1685 int java_lang_Thread::_park_blocker_offset = 0;
1686
1687 #define THREAD_FIELDS_DO(macro) \
1688 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1689 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \
1690 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1691 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1692 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \
1693 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1694 macro(_eetop_offset, k, "eetop", long_signature, false); \
1695 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \
1696 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \
1697 macro(_stackSize_offset, k, "stackSize", long_signature, false); \
1698 macro(_tid_offset, k, "tid", long_signature, false); \
1699 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1700 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false)
1701
1702 void java_lang_Thread::compute_offsets() {
1703 assert(_group_offset == 0, "offsets should be initialized only once");
1704
1705 InstanceKlass* k = SystemDictionary::Thread_klass();
1706 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1707 }
1708
1709 #if INCLUDE_CDS
1710 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1711 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1712 }
1713 #endif
1714
1715 JavaThread* java_lang_Thread::thread(oop java_thread) {
1716 return (JavaThread*)java_thread->address_field(_eetop_offset);
1717 }
1718
1719
1720 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1721 java_thread->address_field_put(_eetop_offset, (address)thread);
1722 }
1723
1724 bool java_lang_Thread::interrupted(oop java_thread) {
1725 // Make sure the caller can safely access oops.
1726 assert(Thread::current()->is_VM_thread() ||
1727 (JavaThread::current()->thread_state() != _thread_blocked &&
1728 JavaThread::current()->thread_state() != _thread_in_native),
1729 "Unsafe access to oop");
1730 return java_thread->bool_field_volatile(_interrupted_offset);
1731 }
1732
1733 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1734 // Make sure the caller can safely access oops.
1735 assert(Thread::current()->is_VM_thread() ||
1736 (JavaThread::current()->thread_state() != _thread_blocked &&
1737 JavaThread::current()->thread_state() != _thread_in_native),
1738 "Unsafe access to oop");
1739 java_thread->bool_field_put_volatile(_interrupted_offset, val);
1740 }
1741
1742
1743 oop java_lang_Thread::name(oop java_thread) {
1744 return java_thread->obj_field(_name_offset);
1745 }
1746
1747
1748 void java_lang_Thread::set_name(oop java_thread, oop name) {
1749 java_thread->obj_field_put(_name_offset, name);
1750 }
1751
1752
1753 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1754 return (ThreadPriority)java_thread->int_field(_priority_offset);
1755 }
1756
1757
1758 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1759 java_thread->int_field_put(_priority_offset, priority);
1760 }
1761
1762
1763 oop java_lang_Thread::threadGroup(oop java_thread) {
1764 return java_thread->obj_field(_group_offset);
1765 }
1766
1767
1768 bool java_lang_Thread::is_stillborn(oop java_thread) {
1769 return java_thread->bool_field(_stillborn_offset) != 0;
1770 }
1771
1772
1773 // We never have reason to turn the stillborn bit off
1774 void java_lang_Thread::set_stillborn(oop java_thread) {
1775 java_thread->bool_field_put(_stillborn_offset, true);
1776 }
1777
1778
1779 bool java_lang_Thread::is_alive(oop java_thread) {
1780 JavaThread* thr = java_lang_Thread::thread(java_thread);
1781 return (thr != NULL);
1782 }
1783
1784
1785 bool java_lang_Thread::is_daemon(oop java_thread) {
1786 return java_thread->bool_field(_daemon_offset) != 0;
1787 }
1788
1789
1790 void java_lang_Thread::set_daemon(oop java_thread) {
1791 java_thread->bool_field_put(_daemon_offset, true);
1792 }
1793
1794 oop java_lang_Thread::context_class_loader(oop java_thread) {
1795 return java_thread->obj_field(_contextClassLoader_offset);
1796 }
1797
1798 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1799 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1800 }
1801
1802
1803 jlong java_lang_Thread::stackSize(oop java_thread) {
1804 return java_thread->long_field(_stackSize_offset);
1805 }
1806
1807 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1808 void java_lang_Thread::set_thread_status(oop java_thread,
1809 java_lang_Thread::ThreadStatus status) {
1810 java_thread->int_field_put(_thread_status_offset, status);
1811 }
1812
1813 // Read thread status value from threadStatus field in java.lang.Thread java class.
1814 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1815 // Make sure the caller is operating on behalf of the VM or is
1816 // running VM code (state == _thread_in_vm).
1817 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1818 JavaThread::current()->thread_state() == _thread_in_vm,
1819 "Java Thread is not running in vm");
1820 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1821 }
1822
1823
1824 jlong java_lang_Thread::thread_id(oop java_thread) {
1825 return java_thread->long_field(_tid_offset);
1826 }
1827
1828 oop java_lang_Thread::park_blocker(oop java_thread) {
1829 return java_thread->obj_field(_park_blocker_offset);
1830 }
1831
1832 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1833 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1834 switch (status) {
1835 case NEW : return "NEW";
1836 case RUNNABLE : return "RUNNABLE";
1837 case SLEEPING : return "TIMED_WAITING (sleeping)";
1838 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1839 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1840 case PARKED : return "WAITING (parking)";
1841 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1842 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1843 case TERMINATED : return "TERMINATED";
1844 default : return "UNKNOWN";
1845 };
1846 }
1847 int java_lang_ThreadGroup::_parent_offset = 0;
1848 int java_lang_ThreadGroup::_name_offset = 0;
1849 int java_lang_ThreadGroup::_threads_offset = 0;
1850 int java_lang_ThreadGroup::_groups_offset = 0;
1851 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1852 int java_lang_ThreadGroup::_destroyed_offset = 0;
1853 int java_lang_ThreadGroup::_daemon_offset = 0;
1854 int java_lang_ThreadGroup::_nthreads_offset = 0;
1855 int java_lang_ThreadGroup::_ngroups_offset = 0;
1856
1857 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1858 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1859 return java_thread_group->obj_field(_parent_offset);
1860 }
1861
1862 // ("name as oop" accessor is not necessary)
1863
1864 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1865 oop name = java_thread_group->obj_field(_name_offset);
1866 // ThreadGroup.name can be null
1867 if (name != NULL) {
1868 return java_lang_String::as_utf8_string(name);
1869 }
1870 return NULL;
1871 }
1872
1873 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1874 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1875 return java_thread_group->int_field(_nthreads_offset);
1876 }
1877
1878 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1879 oop threads = java_thread_group->obj_field(_threads_offset);
1880 assert(threads != NULL, "threadgroups should have threads");
1881 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1882 return objArrayOop(threads);
1883 }
1884
1885 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1886 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1887 return java_thread_group->int_field(_ngroups_offset);
1888 }
1889
1890 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1891 oop groups = java_thread_group->obj_field(_groups_offset);
1892 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1893 return objArrayOop(groups);
1894 }
1895
1896 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1897 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1898 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1899 }
1900
1901 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1902 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1903 return java_thread_group->bool_field(_destroyed_offset) != 0;
1904 }
1905
1906 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1907 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1908 return java_thread_group->bool_field(_daemon_offset) != 0;
1909 }
1910
1911 #define THREADGROUP_FIELDS_DO(macro) \
1912 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \
1913 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
1914 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \
1915 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \
1916 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \
1917 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \
1918 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \
1919 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \
1920 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false)
1921
1922 void java_lang_ThreadGroup::compute_offsets() {
1923 assert(_parent_offset == 0, "offsets should be initialized only once");
1924
1925 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1926 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1927 }
1928
1929 #if INCLUDE_CDS
1930 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1931 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1932 }
1933 #endif
1934
1935 #define THROWABLE_FIELDS_DO(macro) \
1936 macro(backtrace_offset, k, "backtrace", object_signature, false); \
1937 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \
1938 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \
1939 macro(depth_offset, k, "depth", int_signature, false); \
1940 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1941
1942 void java_lang_Throwable::compute_offsets() {
1943 InstanceKlass* k = SystemDictionary::Throwable_klass();
1944 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1945 }
1946
1947 #if INCLUDE_CDS
1948 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1949 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1950 }
1951 #endif
1952
1953 oop java_lang_Throwable::unassigned_stacktrace() {
1954 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1955 oop base = ik->static_field_base_raw();
1956 return base->obj_field(static_unassigned_stacktrace_offset);
1957 }
1958
1959 oop java_lang_Throwable::backtrace(oop throwable) {
1960 return throwable->obj_field_acquire(backtrace_offset);
1961 }
1962
1963
1964 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1965 throwable->release_obj_field_put(backtrace_offset, value);
1966 }
1967
1968 int java_lang_Throwable::depth(oop throwable) {
1969 return throwable->int_field(depth_offset);
1970 }
1971
1972 void java_lang_Throwable::set_depth(oop throwable, int value) {
1973 throwable->int_field_put(depth_offset, value);
1974 }
1975
1976 oop java_lang_Throwable::message(oop throwable) {
1977 return throwable->obj_field(detailMessage_offset);
1978 }
1979
1980
1981 // Return Symbol for detailed_message or NULL
1982 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1983 PRESERVE_EXCEPTION_MARK; // Keep original exception
1984 oop detailed_message = java_lang_Throwable::message(throwable);
1985 if (detailed_message != NULL) {
1986 return java_lang_String::as_symbol(detailed_message);
1987 }
1988 return NULL;
1989 }
1990
1991 void java_lang_Throwable::set_message(oop throwable, oop value) {
1992 throwable->obj_field_put(detailMessage_offset, value);
1993 }
1994
1995
1996 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1997 throwable->obj_field_put(stackTrace_offset, st_element_array);
1998 }
1999
2000 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2001 set_stacktrace(throwable, NULL);
2002 }
2003
2004
2005 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2006 ResourceMark rm;
2007 Klass* k = throwable->klass();
2008 assert(k != NULL, "just checking");
2009 st->print("%s", k->external_name());
2010 oop msg = message(throwable);
2011 if (msg != NULL) {
2012 st->print(": %s", java_lang_String::as_utf8_string(msg));
2013 }
2014 }
2015
2016 // After this many redefines, the stack trace is unreliable.
2017 const int MAX_VERSION = USHRT_MAX;
2018
2019 static inline bool version_matches(Method* method, int version) {
2020 assert(version < MAX_VERSION, "version is too big");
2021 return method != NULL && (method->constants()->version() == version);
2022 }
2023
2024 // This class provides a simple wrapper over the internal structure of
2025 // exception backtrace to insulate users of the backtrace from needing
2026 // to know what it looks like.
2027 // The code of this class is not GC safe. Allocations can only happen
2028 // in expand().
2029 class BacktraceBuilder: public StackObj {
2030 friend class BacktraceIterator;
2031 private:
2032 Handle _backtrace;
2033 objArrayOop _head;
2034 typeArrayOop _methods;
2035 typeArrayOop _bcis;
2036 objArrayOop _mirrors;
2037 typeArrayOop _names; // Needed to insulate method name against redefinition.
2038 // This is set to a java.lang.Boolean(true) if the top frame
2039 // of the backtrace is omitted because it shall be hidden.
2040 // Else it is null.
2041 oop _has_hidden_top_frame;
2042 int _index;
2043 NoSafepointVerifier _nsv;
2044
2045 enum {
2046 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2047 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
2048 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2049 trace_names_offset = java_lang_Throwable::trace_names_offset,
2050 trace_next_offset = java_lang_Throwable::trace_next_offset,
2051 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset,
2052 trace_size = java_lang_Throwable::trace_size,
2053 trace_chunk_size = java_lang_Throwable::trace_chunk_size
2054 };
2055
2056 // get info out of chunks
2057 static typeArrayOop get_methods(objArrayHandle chunk) {
2058 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2059 assert(methods != NULL, "method array should be initialized in backtrace");
2060 return methods;
2061 }
2062 static typeArrayOop get_bcis(objArrayHandle chunk) {
2063 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2064 assert(bcis != NULL, "bci array should be initialized in backtrace");
2065 return bcis;
2066 }
2067 static objArrayOop get_mirrors(objArrayHandle chunk) {
2068 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2069 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2070 return mirrors;
2071 }
2072 static typeArrayOop get_names(objArrayHandle chunk) {
2073 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2074 assert(names != NULL, "names array should be initialized in backtrace");
2075 return names;
2076 }
2077 static oop get_has_hidden_top_frame(objArrayHandle chunk) {
2078 oop hidden = chunk->obj_at(trace_hidden_offset);
2079 return hidden;
2080 }
2081
2082 public:
2083
2084 // constructor for new backtrace
2085 BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(NULL) {
2086 expand(CHECK);
2087 _backtrace = Handle(THREAD, _head);
2088 _index = 0;
2089 }
2090
2091 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2092 _methods = get_methods(backtrace);
2093 _bcis = get_bcis(backtrace);
2094 _mirrors = get_mirrors(backtrace);
2095 _names = get_names(backtrace);
2096 _has_hidden_top_frame = get_has_hidden_top_frame(backtrace);
2097 assert(_methods->length() == _bcis->length() &&
2098 _methods->length() == _mirrors->length() &&
2099 _mirrors->length() == _names->length(),
2100 "method and source information arrays should match");
2101
2102 // head is the preallocated backtrace
2103 _head = backtrace();
2104 _backtrace = Handle(thread, _head);
2105 _index = 0;
2106 }
2107
2108 void expand(TRAPS) {
2109 objArrayHandle old_head(THREAD, _head);
2110 PauseNoSafepointVerifier pnsv(&_nsv);
2111
2112 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2113 objArrayHandle new_head(THREAD, head);
2114
2115 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2116 typeArrayHandle new_methods(THREAD, methods);
2117
2118 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2119 typeArrayHandle new_bcis(THREAD, bcis);
2120
2121 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2122 objArrayHandle new_mirrors(THREAD, mirrors);
2123
2124 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2125 typeArrayHandle new_names(THREAD, names);
2126
2127 if (!old_head.is_null()) {
2128 old_head->obj_at_put(trace_next_offset, new_head());
2129 }
2130 new_head->obj_at_put(trace_methods_offset, new_methods());
2131 new_head->obj_at_put(trace_bcis_offset, new_bcis());
2132 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2133 new_head->obj_at_put(trace_names_offset, new_names());
2134 new_head->obj_at_put(trace_hidden_offset, NULL);
2135
2136 _head = new_head();
2137 _methods = new_methods();
2138 _bcis = new_bcis();
2139 _mirrors = new_mirrors();
2140 _names = new_names();
2141 _index = 0;
2142 }
2143
2144 oop backtrace() {
2145 return _backtrace();
2146 }
2147
2148 inline void push(Method* method, int bci, TRAPS) {
2149 // Smear the -1 bci to 0 since the array only holds unsigned
2150 // shorts. The later line number lookup would just smear the -1
2151 // to a 0 even if it could be recorded.
2152 if (bci == SynchronizationEntryBCI) bci = 0;
2153
2154 if (_index >= trace_chunk_size) {
2155 methodHandle mhandle(THREAD, method);
2156 expand(CHECK);
2157 method = mhandle();
2158 }
2159
2160 _methods->ushort_at_put(_index, method->orig_method_idnum());
2161 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2162
2163 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2164 // klass owning the symbols alive so their refcounts aren't decremented.
2165 Symbol* name = method->name();
2166 _names->symbol_at_put(_index, name);
2167
2168 // We need to save the mirrors in the backtrace to keep the class
2169 // from being unloaded while we still have this stack trace.
2170 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2171 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2172 _index++;
2173 }
2174
2175 void set_has_hidden_top_frame(TRAPS) {
2176 if (_has_hidden_top_frame == NULL) {
2177 // It would be nice to add java/lang/Boolean::TRUE here
2178 // to indicate that this backtrace has a hidden top frame.
2179 // But this code is used before TRUE is allocated.
2180 // Therefor let's just use an arbitrary legal oop
2181 // available right here. We only test for != null
2182 // anyways. _methods is a short[].
2183 assert(_methods != NULL, "we need a legal oop");
2184 _has_hidden_top_frame = _methods;
2185 _head->obj_at_put(trace_hidden_offset, _has_hidden_top_frame);
2186 }
2187 }
2188
2189 };
2190
2191 struct BacktraceElement : public StackObj {
2192 int _method_id;
2193 int _bci;
2194 int _version;
2195 Symbol* _name;
2196 Handle _mirror;
2197 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2198 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2199 };
2200
2201 class BacktraceIterator : public StackObj {
2202 int _index;
2203 objArrayHandle _result;
2204 objArrayHandle _mirrors;
2205 typeArrayHandle _methods;
2206 typeArrayHandle _bcis;
2207 typeArrayHandle _names;
2208
2209 void init(objArrayHandle result, Thread* thread) {
2210 // Get method id, bci, version and mirror from chunk
2211 _result = result;
2212 if (_result.not_null()) {
2213 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2214 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2215 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2216 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2217 _index = 0;
2218 }
2219 }
2220 public:
2221 BacktraceIterator(objArrayHandle result, Thread* thread) {
2222 init(result, thread);
2223 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2224 }
2225
2226 BacktraceElement next(Thread* thread) {
2227 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2228 _methods->ushort_at(_index),
2229 Backtrace::version_at(_bcis->int_at(_index)),
2230 Backtrace::bci_at(_bcis->int_at(_index)),
2231 _names->symbol_at(_index));
2232 _index++;
2233
2234 if (_index >= java_lang_Throwable::trace_chunk_size) {
2235 int next_offset = java_lang_Throwable::trace_next_offset;
2236 // Get next chunk
2237 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2238 init(result, thread);
2239 }
2240 return e;
2241 }
2242
2243 bool repeat() {
2244 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2245 }
2246 };
2247
2248
2249 // Print stack trace element to resource allocated buffer
2250 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2251 int version, int bci, Symbol* name) {
2252 ResourceMark rm;
2253
2254 // Get strings and string lengths
2255 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2256 const char* klass_name = holder->external_name();
2257 int buf_len = (int)strlen(klass_name);
2258
2259 char* method_name = name->as_C_string();
2260 buf_len += (int)strlen(method_name);
2261
2262 char* source_file_name = NULL;
2263 Symbol* source = Backtrace::get_source_file_name(holder, version);
2264 if (source != NULL) {
2265 source_file_name = source->as_C_string();
2266 buf_len += (int)strlen(source_file_name);
2267 }
2268
2269 char *module_name = NULL, *module_version = NULL;
2270 ModuleEntry* module = holder->module();
2271 if (module->is_named()) {
2272 module_name = module->name()->as_C_string();
2273 buf_len += (int)strlen(module_name);
2274 if (module->version() != NULL) {
2275 module_version = module->version()->as_C_string();
2276 buf_len += (int)strlen(module_version);
2277 }
2278 }
2279
2280 // Allocate temporary buffer with extra space for formatting and line number
2281 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2282
2283 // Print stack trace line in buffer
2284 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2285
2286 // Print module information
2287 if (module_name != NULL) {
2288 if (module_version != NULL) {
2289 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2290 } else {
2291 sprintf(buf + (int)strlen(buf), "%s/", module_name);
2292 }
2293 }
2294
2295 // The method can be NULL if the requested class version is gone
2296 Method* method = holder->method_with_orig_idnum(method_id, version);
2297 if (!version_matches(method, version)) {
2298 strcat(buf, "Redefined)");
2299 } else {
2300 int line_number = Backtrace::get_line_number(method, bci);
2301 if (line_number == -2) {
2302 strcat(buf, "Native Method)");
2303 } else {
2304 if (source_file_name != NULL && (line_number != -1)) {
2305 // Sourcename and linenumber
2306 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2307 } else if (source_file_name != NULL) {
2308 // Just sourcename
2309 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2310 } else {
2311 // Neither sourcename nor linenumber
2312 sprintf(buf + (int)strlen(buf), "Unknown Source)");
2313 }
2314 CompiledMethod* nm = method->code();
2315 if (WizardMode && nm != NULL) {
2316 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2317 }
2318 }
2319 }
2320
2321 st->print_cr("%s", buf);
2322 }
2323
2324 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2325 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
2326 int method_id = method->orig_method_idnum();
2327 int version = method->constants()->version();
2328 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2329 }
2330
2331 /**
2332 * Print the throwable message and its stack trace plus all causes by walking the
2333 * cause chain. The output looks the same as of Throwable.printStackTrace().
2334 */
2335 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2336 // First, print the message.
2337 print(throwable(), st);
2338 st->cr();
2339
2340 // Now print the stack trace.
2341 Thread* THREAD = Thread::current();
2342 while (throwable.not_null()) {
2343 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2344 if (result.is_null()) {
2345 st->print_raw_cr("\t<<no stack trace available>>");
2346 return;
2347 }
2348 BacktraceIterator iter(result, THREAD);
2349
2350 while (iter.repeat()) {
2351 BacktraceElement bte = iter.next(THREAD);
2352 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2353 }
2354 {
2355 // Call getCause() which doesn't necessarily return the _cause field.
2356 EXCEPTION_MARK;
2357 JavaValue cause(T_OBJECT);
2358 JavaCalls::call_virtual(&cause,
2359 throwable,
2360 throwable->klass(),
2361 vmSymbols::getCause_name(),
2362 vmSymbols::void_throwable_signature(),
2363 THREAD);
2364 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2365 if (HAS_PENDING_EXCEPTION) {
2366 CLEAR_PENDING_EXCEPTION;
2367 throwable = Handle();
2368 } else {
2369 throwable = Handle(THREAD, (oop) cause.get_jobject());
2370 if (throwable.not_null()) {
2371 st->print("Caused by: ");
2372 print(throwable(), st);
2373 st->cr();
2374 }
2375 }
2376 }
2377 }
2378 }
2379
2380 /**
2381 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2382 */
2383 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2384 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2385 JavaValue result(T_VOID);
2386 JavaCalls::call_virtual(&result,
2387 throwable,
2388 SystemDictionary::Throwable_klass(),
2389 vmSymbols::printStackTrace_name(),
2390 vmSymbols::void_method_signature(),
2391 THREAD);
2392 }
2393
2394 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2395 if (!StackTraceInThrowable) return;
2396 ResourceMark rm(THREAD);
2397
2398 // Start out by clearing the backtrace for this object, in case the VM
2399 // runs out of memory while allocating the stack trace
2400 set_backtrace(throwable(), NULL);
2401 // Clear lazily constructed Java level stacktrace if refilling occurs
2402 // This is unnecessary in 1.7+ but harmless
2403 clear_stacktrace(throwable());
2404
2405 int max_depth = MaxJavaStackTraceDepth;
2406 JavaThread* thread = (JavaThread*)THREAD;
2407
2408 BacktraceBuilder bt(CHECK);
2409
2410 // If there is no Java frame just return the method that was being called
2411 // with bci 0
2412 if (!thread->has_last_Java_frame()) {
2413 if (max_depth >= 1 && method() != NULL) {
2414 bt.push(method(), 0, CHECK);
2415 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2416 set_depth(throwable(), 1);
2417 set_backtrace(throwable(), bt.backtrace());
2418 }
2419 return;
2420 }
2421
2422 // Instead of using vframe directly, this version of fill_in_stack_trace
2423 // basically handles everything by hand. This significantly improved the
2424 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2425 // See bug 6333838 for more details.
2426 // The "ASSERT" here is to verify this method generates the exactly same stack
2427 // trace as utilizing vframe.
2428 #ifdef ASSERT
2429 vframeStream st(thread);
2430 #endif
2431 int total_count = 0;
2432 RegisterMap map(thread, false);
2433 int decode_offset = 0;
2434 CompiledMethod* nm = NULL;
2435 bool skip_fillInStackTrace_check = false;
2436 bool skip_throwableInit_check = false;
2437 bool skip_hidden = !ShowHiddenFrames;
2438
2439 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2440 Method* method = NULL;
2441 int bci = 0;
2442
2443 // Compiled java method case.
2444 if (decode_offset != 0) {
2445 DebugInfoReadStream stream(nm, decode_offset);
2446 decode_offset = stream.read_int();
2447 method = (Method*)nm->metadata_at(stream.read_int());
2448 bci = stream.read_bci();
2449 } else {
2450 if (fr.is_first_frame()) break;
2451 address pc = fr.pc();
2452 if (fr.is_interpreted_frame()) {
2453 address bcp = fr.interpreter_frame_bcp();
2454 method = fr.interpreter_frame_method();
2455 bci = method->bci_from(bcp);
2456 fr = fr.sender(&map);
2457 } else {
2458 CodeBlob* cb = fr.cb();
2459 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2460 // but non nmethod
2461 fr = fr.sender(&map);
2462 if (cb == NULL || !cb->is_compiled()) {
2463 continue;
2464 }
2465 nm = cb->as_compiled_method();
2466 if (nm->method()->is_native()) {
2467 method = nm->method();
2468 bci = 0;
2469 } else {
2470 PcDesc* pd = nm->pc_desc_at(pc);
2471 decode_offset = pd->scope_decode_offset();
2472 // if decode_offset is not equal to 0, it will execute the
2473 // "compiled java method case" at the beginning of the loop.
2474 continue;
2475 }
2476 }
2477 }
2478 #ifdef ASSERT
2479 assert(st.method() == method && st.bci() == bci,
2480 "Wrong stack trace");
2481 st.next();
2482 #endif
2483
2484 // the format of the stacktrace will be:
2485 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2486 // - 0 or more <init> methods for the exception class (skipped)
2487 // - rest of the stack
2488
2489 if (!skip_fillInStackTrace_check) {
2490 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2491 throwable->is_a(method->method_holder())) {
2492 continue;
2493 }
2494 else {
2495 skip_fillInStackTrace_check = true; // gone past them all
2496 }
2497 }
2498 if (!skip_throwableInit_check) {
2499 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2500
2501 // skip <init> methods of the exception class and superclasses
2502 // This is simlar to classic VM.
2503 if (method->name() == vmSymbols::object_initializer_name() &&
2504 throwable->is_a(method->method_holder())) {
2505 continue;
2506 } else {
2507 // there are none or we've seen them all - either way stop checking
2508 skip_throwableInit_check = true;
2509 }
2510 }
2511 if (method->is_hidden()) {
2512 if (skip_hidden) {
2513 if (total_count == 0) {
2514 // The top frame will be hidden from the stack trace.
2515 bt.set_has_hidden_top_frame(CHECK);
2516 }
2517 continue;
2518 }
2519 }
2520 bt.push(method, bci, CHECK);
2521 total_count++;
2522 }
2523
2524 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2525
2526 // Put completed stack trace into throwable object
2527 set_backtrace(throwable(), bt.backtrace());
2528 set_depth(throwable(), total_count);
2529 }
2530
2531 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2532 // No-op if stack trace is disabled
2533 if (!StackTraceInThrowable) {
2534 return;
2535 }
2536
2537 // Disable stack traces for some preallocated out of memory errors
2538 if (!Universe::should_fill_in_stack_trace(throwable)) {
2539 return;
2540 }
2541
2542 PRESERVE_EXCEPTION_MARK;
2543
2544 JavaThread* thread = JavaThread::active();
2545 fill_in_stack_trace(throwable, method, thread);
2546 // ignore exceptions thrown during stack trace filling
2547 CLEAR_PENDING_EXCEPTION;
2548 }
2549
2550 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2551 // Allocate stack trace - backtrace is created but not filled in
2552
2553 // No-op if stack trace is disabled
2554 if (!StackTraceInThrowable) return;
2555 BacktraceBuilder bt(CHECK); // creates a backtrace
2556 set_backtrace(throwable(), bt.backtrace());
2557 }
2558
2559
2560 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2561 // Fill in stack trace into preallocated backtrace (no GC)
2562
2563 // No-op if stack trace is disabled
2564 if (!StackTraceInThrowable) return;
2565
2566 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2567
2568 JavaThread* THREAD = JavaThread::current();
2569
2570 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2571 assert(backtrace.not_null(), "backtrace should have been preallocated");
2572
2573 ResourceMark rm(THREAD);
2574 vframeStream st(THREAD);
2575
2576 BacktraceBuilder bt(THREAD, backtrace);
2577
2578 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2579 // methods as preallocated errors aren't created by "java" code.
2580
2581 // fill in as much stack trace as possible
2582 int chunk_count = 0;
2583 for (;!st.at_end(); st.next()) {
2584 bt.push(st.method(), st.bci(), CHECK);
2585 chunk_count++;
2586
2587 // Bail-out for deep stacks
2588 if (chunk_count >= trace_chunk_size) break;
2589 }
2590 set_depth(throwable(), chunk_count);
2591 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2592
2593 // We support the Throwable immutability protocol defined for Java 7.
2594 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2595 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2596 }
2597
2598 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2599 objArrayHandle stack_trace_array_h, TRAPS) {
2600
2601 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2602 THROW(vmSymbols::java_lang_NullPointerException());
2603 }
2604
2605 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2606
2607 if (stack_trace_array_h->length() != depth(throwable())) {
2608 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2609 }
2610
2611 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2612 BacktraceIterator iter(result, THREAD);
2613
2614 int index = 0;
2615 while (iter.repeat()) {
2616 BacktraceElement bte = iter.next(THREAD);
2617
2618 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2619
2620 if (stack_trace_element.is_null()) {
2621 THROW(vmSymbols::java_lang_NullPointerException());
2622 }
2623
2624 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2625 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2626
2627 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2628 method,
2629 bte._version,
2630 bte._bci,
2631 bte._name, CHECK);
2632 }
2633 }
2634
2635 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2636 Thread* THREAD = Thread::current();
2637 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable)));
2638 BacktraceIterator iter(result, THREAD);
2639 // No backtrace available.
2640 if (!iter.repeat()) return false;
2641
2642 // If the exception happened in a frame that has been hidden, i.e.,
2643 // omitted from the back trace, we can not compute the message.
2644 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2645 if (hidden != NULL) {
2646 return false;
2647 }
2648
2649 // Get first backtrace element.
2650 BacktraceElement bte = iter.next(THREAD);
2651
2652 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2653 assert(holder != NULL, "first element should be non-null");
2654 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2655
2656 // Original version is no longer available.
2657 if (m == NULL || !version_matches(m, bte._version)) {
2658 return false;
2659 }
2660
2661 *method = m;
2662 *bci = bte._bci;
2663 return true;
2664 }
2665
2666 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2667 // Allocate java.lang.StackTraceElement instance
2668 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2669 assert(k != NULL, "must be loaded in 1.4+");
2670 if (k->should_be_initialized()) {
2671 k->initialize(CHECK_0);
2672 }
2673
2674 Handle element = k->allocate_instance_handle(CHECK_0);
2675
2676 int version = method->constants()->version();
2677 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2678 return element();
2679 }
2680
2681 void java_lang_StackTraceElement::fill_in(Handle element,
2682 InstanceKlass* holder, const methodHandle& method,
2683 int version, int bci, Symbol* name, TRAPS) {
2684 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2685
2686 ResourceMark rm(THREAD);
2687 HandleMark hm(THREAD);
2688
2689 // Fill in class name
2690 Handle java_class(THREAD, holder->java_mirror());
2691 oop classname = java_lang_Class::name(java_class, CHECK);
2692 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2693 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2694
2695 oop loader = holder->class_loader();
2696 if (loader != NULL) {
2697 oop loader_name = java_lang_ClassLoader::name(loader);
2698 if (loader_name != NULL)
2699 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2700 }
2701
2702 // Fill in method name
2703 oop methodname = StringTable::intern(name, CHECK);
2704 java_lang_StackTraceElement::set_methodName(element(), methodname);
2705
2706 // Fill in module name and version
2707 ModuleEntry* module = holder->module();
2708 if (module->is_named()) {
2709 oop module_name = StringTable::intern(module->name(), CHECK);
2710 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2711 oop module_version;
2712 if (module->version() != NULL) {
2713 module_version = StringTable::intern(module->version(), CHECK);
2714 } else {
2715 module_version = NULL;
2716 }
2717 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2718 }
2719
2720 if (method() == NULL || !version_matches(method(), version)) {
2721 // The method was redefined, accurate line number information isn't available
2722 java_lang_StackTraceElement::set_fileName(element(), NULL);
2723 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2724 } else {
2725 // Fill in source file name and line number.
2726 Symbol* source = Backtrace::get_source_file_name(holder, version);
2727 oop source_file = java_lang_Class::source_file(java_class());
2728 if (source != NULL) {
2729 // Class was not redefined. We can trust its cache if set,
2730 // else we have to initialize it.
2731 if (source_file == NULL) {
2732 source_file = StringTable::intern(source, CHECK);
2733 java_lang_Class::set_source_file(java_class(), source_file);
2734 }
2735 } else {
2736 // Class was redefined. Dump the cache if it was set.
2737 if (source_file != NULL) {
2738 source_file = NULL;
2739 java_lang_Class::set_source_file(java_class(), source_file);
2740 }
2741 }
2742 java_lang_StackTraceElement::set_fileName(element(), source_file);
2743
2744 int line_number = Backtrace::get_line_number(method(), bci);
2745 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2746 }
2747 }
2748
2749 #if INCLUDE_JVMCI
2750 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2751 int method_id = method->orig_method_idnum();
2752 int cpref = method->name_index();
2753 decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2754 }
2755
2756 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2757 // Fill in class name
2758 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2759 Method* method = holder->method_with_orig_idnum(method_id, version);
2760
2761 // The method can be NULL if the requested class version is gone
2762 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2763
2764 // Fill in method name
2765 methodname = sym;
2766
2767 if (!version_matches(method, version)) {
2768 // If the method was redefined, accurate line number information isn't available
2769 filename = NULL;
2770 line_number = -1;
2771 } else {
2772 // Fill in source file name and line number.
2773 // Use a specific ik version as a holder since the mirror might
2774 // refer to a version that is now obsolete and no longer accessible
2775 // via the previous versions list.
2776 holder = holder->get_klass_version(version);
2777 assert(holder != NULL, "sanity check");
2778 filename = holder->source_file_name();
2779 line_number = Backtrace::get_line_number(method, bci);
2780 }
2781 }
2782 #endif // INCLUDE_JVMCI
2783
2784 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2785 HandleMark hm(THREAD);
2786 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2787 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2788 // we should expand MemberName::name when Throwable uses StackTrace
2789 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2790 return method;
2791 }
2792
2793 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2794 // set Method* or mid/cpref
2795 HandleMark hm(THREAD);
2796 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2797 InstanceKlass* ik = method->method_holder();
2798 CallInfo info(method(), ik, CHECK);
2799 MethodHandles::init_method_MemberName(mname, info);
2800 // set bci
2801 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2802 // method may be redefined; store the version
2803 int version = method->constants()->version();
2804 assert((jushort)version == version, "version should be short");
2805 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2806 }
2807
2808 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2809 ResourceMark rm(THREAD);
2810 HandleMark hm(THREAD);
2811 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2812 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2813 InstanceKlass* holder = InstanceKlass::cast(clazz);
2814 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2815
2816 short version = stackFrame->short_field(_version_offset);
2817 int bci = stackFrame->int_field(_bci_offset);
2818 Symbol* name = method->name();
2819 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method),
2820 version, bci, name, CHECK);
2821 }
2822
2823 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2824 macro(_memberName_offset, k, "memberName", object_signature, false); \
2825 macro(_bci_offset, k, "bci", int_signature, false)
2826
2827 void java_lang_StackFrameInfo::compute_offsets() {
2828 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2829 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2830 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2831 }
2832
2833 #if INCLUDE_CDS
2834 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2835 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2836 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2837 }
2838 #endif
2839
2840 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2841 macro(_monitors_offset, k, "monitors", object_array_signature, false); \
2842 macro(_locals_offset, k, "locals", object_array_signature, false); \
2843 macro(_operands_offset, k, "operands", object_array_signature, false); \
2844 macro(_mode_offset, k, "mode", int_signature, false)
2845
2846 void java_lang_LiveStackFrameInfo::compute_offsets() {
2847 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2848 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2849 }
2850
2851 #if INCLUDE_CDS
2852 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2853 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2854 }
2855 #endif
2856
2857 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2858 macro(override_offset, k, "override", bool_signature, false)
2859
2860 void java_lang_reflect_AccessibleObject::compute_offsets() {
2861 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2862 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2863 }
2864
2865 #if INCLUDE_CDS
2866 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2867 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2868 }
2869 #endif
2870
2871 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2873 return (jboolean) reflect->bool_field(override_offset);
2874 }
2875
2876 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2878 reflect->bool_field_put(override_offset, (int) value);
2879 }
2880
2881 #define METHOD_FIELDS_DO(macro) \
2882 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2883 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
2884 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \
2885 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2886 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2887 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2888 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2889 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2890 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2891 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2892 macro(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false);
2893
2894 void java_lang_reflect_Method::compute_offsets() {
2895 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2896 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2897 }
2898
2899 #if INCLUDE_CDS
2900 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2901 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2902 }
2903 #endif
2904
2905 Handle java_lang_reflect_Method::create(TRAPS) {
2906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2907 Klass* klass = SystemDictionary::reflect_Method_klass();
2908 // This class is eagerly initialized during VM initialization, since we keep a refence
2909 // to one of the methods
2910 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2911 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2912 }
2913
2914 oop java_lang_reflect_Method::clazz(oop reflect) {
2915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2916 return reflect->obj_field(clazz_offset);
2917 }
2918
2919 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2921 reflect->obj_field_put(clazz_offset, value);
2922 }
2923
2924 int java_lang_reflect_Method::slot(oop reflect) {
2925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2926 return reflect->int_field(slot_offset);
2927 }
2928
2929 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2931 reflect->int_field_put(slot_offset, value);
2932 }
2933
2934 void java_lang_reflect_Method::set_name(oop method, oop value) {
2935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2936 method->obj_field_put(name_offset, value);
2937 }
2938
2939 oop java_lang_reflect_Method::return_type(oop method) {
2940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2941 return method->obj_field(returnType_offset);
2942 }
2943
2944 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2946 method->obj_field_put(returnType_offset, value);
2947 }
2948
2949 oop java_lang_reflect_Method::parameter_types(oop method) {
2950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2951 return method->obj_field(parameterTypes_offset);
2952 }
2953
2954 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2956 method->obj_field_put(parameterTypes_offset, value);
2957 }
2958
2959 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2960 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2961 method->obj_field_put(exceptionTypes_offset, value);
2962 }
2963
2964 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2966 method->int_field_put(modifiers_offset, value);
2967 }
2968
2969 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2970 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2971 method->obj_field_put(signature_offset, value);
2972 }
2973
2974 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2976 method->obj_field_put(annotations_offset, value);
2977 }
2978
2979 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2981 method->obj_field_put(parameter_annotations_offset, value);
2982 }
2983
2984 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2986 method->obj_field_put(annotation_default_offset, value);
2987 }
2988
2989 #define CONSTRUCTOR_FIELDS_DO(macro) \
2990 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
2991 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2992 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2993 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
2994 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
2995 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
2996 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \
2997 macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2998
2999 void java_lang_reflect_Constructor::compute_offsets() {
3000 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
3001 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3002 }
3003
3004 #if INCLUDE_CDS
3005 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3006 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3007 }
3008 #endif
3009
3010 Handle java_lang_reflect_Constructor::create(TRAPS) {
3011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3012 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3013 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3014 InstanceKlass* ik = InstanceKlass::cast(k);
3015 // Ensure it is initialized
3016 ik->initialize(CHECK_NH);
3017 return ik->allocate_instance_handle(THREAD);
3018 }
3019
3020 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3022 return reflect->obj_field(clazz_offset);
3023 }
3024
3025 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3027 reflect->obj_field_put(clazz_offset, value);
3028 }
3029
3030 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3032 return constructor->obj_field(parameterTypes_offset);
3033 }
3034
3035 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3037 constructor->obj_field_put(parameterTypes_offset, value);
3038 }
3039
3040 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3042 constructor->obj_field_put(exceptionTypes_offset, value);
3043 }
3044
3045 int java_lang_reflect_Constructor::slot(oop reflect) {
3046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3047 return reflect->int_field(slot_offset);
3048 }
3049
3050 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3051 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3052 reflect->int_field_put(slot_offset, value);
3053 }
3054
3055 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3057 constructor->int_field_put(modifiers_offset, value);
3058 }
3059
3060 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3062 constructor->obj_field_put(signature_offset, value);
3063 }
3064
3065 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3066 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3067 constructor->obj_field_put(annotations_offset, value);
3068 }
3069
3070 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3071 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3072 method->obj_field_put(parameter_annotations_offset, value);
3073 }
3074
3075 #define FIELD_FIELDS_DO(macro) \
3076 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3077 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3078 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \
3079 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \
3080 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3081 macro(signature_offset, k, vmSymbols::signature_name(), string_signature, false); \
3082 macro(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false);
3083
3084 void java_lang_reflect_Field::compute_offsets() {
3085 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3086 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3087 }
3088
3089 #if INCLUDE_CDS
3090 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3091 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3092 }
3093 #endif
3094
3095 Handle java_lang_reflect_Field::create(TRAPS) {
3096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3097 Symbol* name = vmSymbols::java_lang_reflect_Field();
3098 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3099 InstanceKlass* ik = InstanceKlass::cast(k);
3100 // Ensure it is initialized
3101 ik->initialize(CHECK_NH);
3102 return ik->allocate_instance_handle(THREAD);
3103 }
3104
3105 oop java_lang_reflect_Field::clazz(oop reflect) {
3106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3107 return reflect->obj_field(clazz_offset);
3108 }
3109
3110 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3112 reflect->obj_field_put(clazz_offset, value);
3113 }
3114
3115 oop java_lang_reflect_Field::name(oop field) {
3116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3117 return field->obj_field(name_offset);
3118 }
3119
3120 void java_lang_reflect_Field::set_name(oop field, oop value) {
3121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3122 field->obj_field_put(name_offset, value);
3123 }
3124
3125 oop java_lang_reflect_Field::type(oop field) {
3126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3127 return field->obj_field(type_offset);
3128 }
3129
3130 void java_lang_reflect_Field::set_type(oop field, oop value) {
3131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3132 field->obj_field_put(type_offset, value);
3133 }
3134
3135 int java_lang_reflect_Field::slot(oop reflect) {
3136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3137 return reflect->int_field(slot_offset);
3138 }
3139
3140 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3142 reflect->int_field_put(slot_offset, value);
3143 }
3144
3145 int java_lang_reflect_Field::modifiers(oop field) {
3146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3147 return field->int_field(modifiers_offset);
3148 }
3149
3150 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3152 field->int_field_put(modifiers_offset, value);
3153 }
3154
3155 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3157 field->obj_field_put(signature_offset, value);
3158 }
3159
3160 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3162 field->obj_field_put(annotations_offset, value);
3163 }
3164
3165 #define CONSTANTPOOL_FIELDS_DO(macro) \
3166 macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3167
3168 void reflect_ConstantPool::compute_offsets() {
3169 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3170 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3171 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3172 }
3173
3174 #if INCLUDE_CDS
3175 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3176 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3177 }
3178 #endif
3179
3180 #define PARAMETER_FIELDS_DO(macro) \
3181 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \
3182 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \
3183 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \
3184 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false)
3185
3186 void java_lang_reflect_Parameter::compute_offsets() {
3187 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3188 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3189 }
3190
3191 #if INCLUDE_CDS
3192 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3193 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3194 }
3195 #endif
3196
3197 Handle java_lang_reflect_Parameter::create(TRAPS) {
3198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3199 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3200 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3201 InstanceKlass* ik = InstanceKlass::cast(k);
3202 // Ensure it is initialized
3203 ik->initialize(CHECK_NH);
3204 return ik->allocate_instance_handle(THREAD);
3205 }
3206
3207 oop java_lang_reflect_Parameter::name(oop param) {
3208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3209 return param->obj_field(name_offset);
3210 }
3211
3212 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3214 param->obj_field_put(name_offset, value);
3215 }
3216
3217 int java_lang_reflect_Parameter::modifiers(oop param) {
3218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3219 return param->int_field(modifiers_offset);
3220 }
3221
3222 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3224 param->int_field_put(modifiers_offset, value);
3225 }
3226
3227 int java_lang_reflect_Parameter::index(oop param) {
3228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3229 return param->int_field(index_offset);
3230 }
3231
3232 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3234 param->int_field_put(index_offset, value);
3235 }
3236
3237 oop java_lang_reflect_Parameter::executable(oop param) {
3238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3239 return param->obj_field(executable_offset);
3240 }
3241
3242 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3244 param->obj_field_put(executable_offset, value);
3245 }
3246
3247
3248 int java_lang_Module::loader_offset;
3249 int java_lang_Module::name_offset;
3250 int java_lang_Module::_module_entry_offset = -1;
3251
3252 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3254 return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3255 vmSymbols::java_lang_module_init_signature(),
3256 loader, module_name, CHECK_NH);
3257 }
3258
3259 #define MODULE_FIELDS_DO(macro) \
3260 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \
3261 macro(name_offset, k, vmSymbols::name_name(), string_signature, false)
3262
3263 void java_lang_Module::compute_offsets() {
3264 InstanceKlass* k = SystemDictionary::Module_klass();
3265 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3266 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3267 }
3268
3269 #if INCLUDE_CDS
3270 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3271 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3272 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3273 }
3274 #endif
3275
3276 oop java_lang_Module::loader(oop module) {
3277 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3278 return module->obj_field(loader_offset);
3279 }
3280
3281 void java_lang_Module::set_loader(oop module, oop value) {
3282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3283 module->obj_field_put(loader_offset, value);
3284 }
3285
3286 oop java_lang_Module::name(oop module) {
3287 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3288 return module->obj_field(name_offset);
3289 }
3290
3291 void java_lang_Module::set_name(oop module, oop value) {
3292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3293 module->obj_field_put(name_offset, value);
3294 }
3295
3296 ModuleEntry* java_lang_Module::module_entry(oop module) {
3297 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3298 assert(module != NULL, "module can't be null");
3299 assert(oopDesc::is_oop(module), "module must be oop");
3300
3301 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3302 if (module_entry == NULL) {
3303 // If the inject field containing the ModuleEntry* is null then return the
3304 // class loader's unnamed module.
3305 oop loader = java_lang_Module::loader(module);
3306 Handle h_loader = Handle(Thread::current(), loader);
3307 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3308 return loader_cld->unnamed_module();
3309 }
3310 return module_entry;
3311 }
3312
3313 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3314 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3315 assert(module != NULL, "module can't be null");
3316 assert(oopDesc::is_oop(module), "module must be oop");
3317 module->address_field_put(_module_entry_offset, (address)module_entry);
3318 }
3319
3320 Handle reflect_ConstantPool::create(TRAPS) {
3321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3322 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3323 // Ensure it is initialized
3324 k->initialize(CHECK_NH);
3325 return k->allocate_instance_handle(THREAD);
3326 }
3327
3328
3329 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3331 oop mirror = value->pool_holder()->java_mirror();
3332 // Save the mirror to get back the constant pool.
3333 reflect->obj_field_put(_oop_offset, mirror);
3334 }
3335
3336 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3338
3339 oop mirror = reflect->obj_field(_oop_offset);
3340 Klass* k = java_lang_Class::as_Klass(mirror);
3341 assert(k->is_instance_klass(), "Must be");
3342
3343 // Get the constant pool back from the klass. Since class redefinition
3344 // merges the new constant pool into the old, this is essentially the
3345 // same constant pool as the original. If constant pool merging is
3346 // no longer done in the future, this will have to change to save
3347 // the original.
3348 return InstanceKlass::cast(k)->constants();
3349 }
3350
3351 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3352 macro(_base_offset, k, "base", object_signature, false)
3353
3354 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3355 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3356 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3357 }
3358
3359 #if INCLUDE_CDS
3360 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3361 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3362 }
3363 #endif
3364
3365 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3366 Klass* k = SystemDictionary::box_klass(type);
3367 if (k == NULL) return NULL;
3368 InstanceKlass* ik = InstanceKlass::cast(k);
3369 if (!ik->is_initialized()) ik->initialize(CHECK_0);
3370 return ik->allocate_instance(THREAD);
3371 }
3372
3373
3374 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3375 oop box = initialize_and_allocate(type, CHECK_0);
3376 if (box == NULL) return NULL;
3377 switch (type) {
3378 case T_BOOLEAN:
3379 box->bool_field_put(value_offset, value->z);
3380 break;
3381 case T_CHAR:
3382 box->char_field_put(value_offset, value->c);
3383 break;
3384 case T_FLOAT:
3385 box->float_field_put(value_offset, value->f);
3386 break;
3387 case T_DOUBLE:
3388 box->double_field_put(long_value_offset, value->d);
3389 break;
3390 case T_BYTE:
3391 box->byte_field_put(value_offset, value->b);
3392 break;
3393 case T_SHORT:
3394 box->short_field_put(value_offset, value->s);
3395 break;
3396 case T_INT:
3397 box->int_field_put(value_offset, value->i);
3398 break;
3399 case T_LONG:
3400 box->long_field_put(long_value_offset, value->j);
3401 break;
3402 default:
3403 return NULL;
3404 }
3405 return box;
3406 }
3407
3408
3409 BasicType java_lang_boxing_object::basic_type(oop box) {
3410 if (box == NULL) return T_ILLEGAL;
3411 BasicType type = SystemDictionary::box_klass_type(box->klass());
3412 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
3413 return T_ILLEGAL;
3414 return type;
3415 }
3416
3417
3418 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3419 BasicType type = SystemDictionary::box_klass_type(box->klass());
3420 switch (type) {
3421 case T_BOOLEAN:
3422 value->z = box->bool_field(value_offset);
3423 break;
3424 case T_CHAR:
3425 value->c = box->char_field(value_offset);
3426 break;
3427 case T_FLOAT:
3428 value->f = box->float_field(value_offset);
3429 break;
3430 case T_DOUBLE:
3431 value->d = box->double_field(long_value_offset);
3432 break;
3433 case T_BYTE:
3434 value->b = box->byte_field(value_offset);
3435 break;
3436 case T_SHORT:
3437 value->s = box->short_field(value_offset);
3438 break;
3439 case T_INT:
3440 value->i = box->int_field(value_offset);
3441 break;
3442 case T_LONG:
3443 value->j = box->long_field(long_value_offset);
3444 break;
3445 default:
3446 return T_ILLEGAL;
3447 } // end switch
3448 return type;
3449 }
3450
3451
3452 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3453 BasicType type = SystemDictionary::box_klass_type(box->klass());
3454 switch (type) {
3455 case T_BOOLEAN:
3456 box->bool_field_put(value_offset, value->z);
3457 break;
3458 case T_CHAR:
3459 box->char_field_put(value_offset, value->c);
3460 break;
3461 case T_FLOAT:
3462 box->float_field_put(value_offset, value->f);
3463 break;
3464 case T_DOUBLE:
3465 box->double_field_put(long_value_offset, value->d);
3466 break;
3467 case T_BYTE:
3468 box->byte_field_put(value_offset, value->b);
3469 break;
3470 case T_SHORT:
3471 box->short_field_put(value_offset, value->s);
3472 break;
3473 case T_INT:
3474 box->int_field_put(value_offset, value->i);
3475 break;
3476 case T_LONG:
3477 box->long_field_put(long_value_offset, value->j);
3478 break;
3479 default:
3480 return T_ILLEGAL;
3481 } // end switch
3482 return type;
3483 }
3484
3485
3486 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3487 switch (type) {
3488 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3489 case T_CHAR: st->print("%d", value->c); break;
3490 case T_BYTE: st->print("%d", value->b); break;
3491 case T_SHORT: st->print("%d", value->s); break;
3492 case T_INT: st->print("%d", value->i); break;
3493 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3494 case T_FLOAT: st->print("%f", value->f); break;
3495 case T_DOUBLE: st->print("%lf", value->d); break;
3496 default: st->print("type %d?", type); break;
3497 }
3498 }
3499
3500 // Support for java_lang_ref_Reference
3501
3502 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3503 assert(obj != NULL, "sanity");
3504 if (offset != java_lang_ref_Reference::referent_offset) {
3505 return false;
3506 }
3507
3508 Klass* k = obj->klass();
3509 if (!k->is_instance_klass()) {
3510 return false;
3511 }
3512
3513 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3514 bool is_reference = ik->reference_type() != REF_NONE;
3515 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3516 return is_reference;
3517 }
3518
3519 // Support for java_lang_ref_SoftReference
3520 //
3521
3522 #define SOFTREFERENCE_FIELDS_DO(macro) \
3523 macro(timestamp_offset, k, "timestamp", long_signature, false); \
3524 macro(static_clock_offset, k, "clock", long_signature, true)
3525
3526 void java_lang_ref_SoftReference::compute_offsets() {
3527 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3528 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3529 }
3530
3531 #if INCLUDE_CDS
3532 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3533 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3534 }
3535 #endif
3536
3537 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3538 return ref->long_field(timestamp_offset);
3539 }
3540
3541 jlong java_lang_ref_SoftReference::clock() {
3542 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3543 oop base = ik->static_field_base_raw();
3544 return base->long_field(static_clock_offset);
3545 }
3546
3547 void java_lang_ref_SoftReference::set_clock(jlong value) {
3548 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3549 oop base = ik->static_field_base_raw();
3550 base->long_field_put(static_clock_offset, value);
3551 }
3552
3553 // Support for java_lang_invoke_DirectMethodHandle
3554
3555 int java_lang_invoke_DirectMethodHandle::_member_offset;
3556
3557 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3558 oop member_name = NULL;
3559 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3560 "a DirectMethodHandle oop is expected");
3561 return dmh->obj_field(member_offset_in_bytes());
3562 }
3563
3564 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3565 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3566
3567 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3568 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3569 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3570 }
3571
3572 #if INCLUDE_CDS
3573 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3574 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3575 }
3576 #endif
3577
3578 // Support for java_lang_invoke_MethodHandle
3579
3580 int java_lang_invoke_MethodHandle::_type_offset;
3581 int java_lang_invoke_MethodHandle::_form_offset;
3582
3583 int java_lang_invoke_MemberName::_clazz_offset;
3584 int java_lang_invoke_MemberName::_name_offset;
3585 int java_lang_invoke_MemberName::_type_offset;
3586 int java_lang_invoke_MemberName::_flags_offset;
3587 int java_lang_invoke_MemberName::_method_offset;
3588 int java_lang_invoke_MemberName::_vmindex_offset;
3589
3590 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3591 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3592
3593 int java_lang_invoke_LambdaForm::_vmentry_offset;
3594
3595 #define METHODHANDLE_FIELDS_DO(macro) \
3596 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3597 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false)
3598
3599 void java_lang_invoke_MethodHandle::compute_offsets() {
3600 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3601 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3602 }
3603
3604 #if INCLUDE_CDS
3605 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3606 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3607 }
3608 #endif
3609
3610 #define MEMBERNAME_FIELDS_DO(macro) \
3611 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \
3612 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \
3613 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \
3614 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \
3615 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false)
3616
3617 void java_lang_invoke_MemberName::compute_offsets() {
3618 InstanceKlass* k = SystemDictionary::MemberName_klass();
3619 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3620 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3621 }
3622
3623 #if INCLUDE_CDS
3624 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3625 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3626 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3627 }
3628 #endif
3629
3630 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3631 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3632 assert(k != NULL, "jdk mismatch");
3633 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3634 }
3635
3636 #if INCLUDE_CDS
3637 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3638 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3639 }
3640 #endif
3641
3642 #define LAMBDAFORM_FIELDS_DO(macro) \
3643 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3644
3645 void java_lang_invoke_LambdaForm::compute_offsets() {
3646 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3647 assert (k != NULL, "jdk mismatch");
3648 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3649 }
3650
3651 #if INCLUDE_CDS
3652 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3653 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3654 }
3655 #endif
3656
3657 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3658 return obj != NULL && is_subclass(obj->klass());
3659 }
3660
3661
3662 oop java_lang_invoke_MethodHandle::type(oop mh) {
3663 return mh->obj_field(_type_offset);
3664 }
3665
3666 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3667 mh->obj_field_put(_type_offset, mtype);
3668 }
3669
3670 oop java_lang_invoke_MethodHandle::form(oop mh) {
3671 assert(_form_offset != 0, "");
3672 return mh->obj_field(_form_offset);
3673 }
3674
3675 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3676 assert(_form_offset != 0, "");
3677 mh->obj_field_put(_form_offset, lform);
3678 }
3679
3680 /// MemberName accessors
3681
3682 oop java_lang_invoke_MemberName::clazz(oop mname) {
3683 assert(is_instance(mname), "wrong type");
3684 return mname->obj_field(_clazz_offset);
3685 }
3686
3687 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3688 assert(is_instance(mname), "wrong type");
3689 mname->obj_field_put(_clazz_offset, clazz);
3690 }
3691
3692 oop java_lang_invoke_MemberName::name(oop mname) {
3693 assert(is_instance(mname), "wrong type");
3694 return mname->obj_field(_name_offset);
3695 }
3696
3697 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3698 assert(is_instance(mname), "wrong type");
3699 mname->obj_field_put(_name_offset, name);
3700 }
3701
3702 oop java_lang_invoke_MemberName::type(oop mname) {
3703 assert(is_instance(mname), "wrong type");
3704 return mname->obj_field(_type_offset);
3705 }
3706
3707 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3708 assert(is_instance(mname), "wrong type");
3709 mname->obj_field_put(_type_offset, type);
3710 }
3711
3712 int java_lang_invoke_MemberName::flags(oop mname) {
3713 assert(is_instance(mname), "wrong type");
3714 return mname->int_field(_flags_offset);
3715 }
3716
3717 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3718 assert(is_instance(mname), "wrong type");
3719 mname->int_field_put(_flags_offset, flags);
3720 }
3721
3722
3723 // Return vmtarget from ResolvedMethodName method field through indirection
3724 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3725 assert(is_instance(mname), "wrong type");
3726 oop method = mname->obj_field(_method_offset);
3727 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3728 }
3729
3730 bool java_lang_invoke_MemberName::is_method(oop mname) {
3731 assert(is_instance(mname), "must be MemberName");
3732 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3733 }
3734
3735 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3736 assert(is_instance(mname), "wrong type");
3737 mname->obj_field_put(_method_offset, resolved_method);
3738 }
3739
3740 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3741 assert(is_instance(mname), "wrong type");
3742 return (intptr_t) mname->address_field(_vmindex_offset);
3743 }
3744
3745 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3746 assert(is_instance(mname), "wrong type");
3747 mname->address_field_put(_vmindex_offset, (address) index);
3748 }
3749
3750
3751 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3752 assert(is_instance(resolved_method), "wrong type");
3753 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3754 assert(m->is_method(), "must be");
3755 return m;
3756 }
3757
3758 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3759 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3760 assert(is_instance(resolved_method), "wrong type");
3761 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3762 }
3763
3764 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3765 assert(is_instance(resolved_method), "wrong type");
3766 resolved_method->obj_field_put(_vmholder_offset, holder);
3767 }
3768
3769 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3770 const Method* method = m();
3771
3772 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3773 oop resolved_method = ResolvedMethodTable::find_method(method);
3774 if (resolved_method != NULL) {
3775 return resolved_method;
3776 }
3777
3778 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3779 if (!k->is_initialized()) {
3780 k->initialize(CHECK_NULL);
3781 }
3782
3783 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3784
3785 NoSafepointVerifier nsv;
3786
3787 if (method->is_old()) {
3788 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3789 method->get_new_method();
3790 }
3791
3792 InstanceKlass* holder = method->method_holder();
3793
3794 set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3795 // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3796 // distinct loaders) to ensure the metadata is kept alive.
3797 // This mirror may be different than the one in clazz field.
3798 set_vmholder(new_resolved_method, holder->java_mirror());
3799
3800 // Set flag in class to indicate this InstanceKlass has entries in the table
3801 // to avoid walking table during redefinition if none of the redefined classes
3802 // have any membernames in the table.
3803 holder->set_has_resolved_methods();
3804
3805 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3806 }
3807
3808 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3809 assert(is_instance(lform), "wrong type");
3810 return lform->obj_field(_vmentry_offset);
3811 }
3812
3813
3814 // Support for java_lang_invoke_MethodType
3815
3816 int java_lang_invoke_MethodType::_rtype_offset;
3817 int java_lang_invoke_MethodType::_ptypes_offset;
3818
3819 #define METHODTYPE_FIELDS_DO(macro) \
3820 macro(_rtype_offset, k, "rtype", class_signature, false); \
3821 macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3822
3823 void java_lang_invoke_MethodType::compute_offsets() {
3824 InstanceKlass* k = SystemDictionary::MethodType_klass();
3825 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3826 }
3827
3828 #if INCLUDE_CDS
3829 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3830 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3831 }
3832 #endif
3833
3834 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3835 st->print("(");
3836 objArrayOop pts = ptypes(mt);
3837 for (int i = 0, limit = pts->length(); i < limit; i++) {
3838 java_lang_Class::print_signature(pts->obj_at(i), st);
3839 }
3840 st->print(")");
3841 java_lang_Class::print_signature(rtype(mt), st);
3842 }
3843
3844 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3845 ResourceMark rm;
3846 stringStream buffer(128);
3847 print_signature(mt, &buffer);
3848 const char* sigstr = buffer.base();
3849 int siglen = (int) buffer.size();
3850 Symbol *name;
3851 if (!intern_if_not_found) {
3852 name = SymbolTable::probe(sigstr, siglen);
3853 } else {
3854 name = SymbolTable::new_symbol(sigstr, siglen);
3855 }
3856 return name;
3857 }
3858
3859 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3860 if (mt1 == mt2)
3861 return true;
3862 if (rtype(mt1) != rtype(mt2))
3863 return false;
3864 if (ptype_count(mt1) != ptype_count(mt2))
3865 return false;
3866 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3867 if (ptype(mt1, i) != ptype(mt2, i))
3868 return false;
3869 }
3870 return true;
3871 }
3872
3873 oop java_lang_invoke_MethodType::rtype(oop mt) {
3874 assert(is_instance(mt), "must be a MethodType");
3875 return mt->obj_field(_rtype_offset);
3876 }
3877
3878 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3879 assert(is_instance(mt), "must be a MethodType");
3880 return (objArrayOop) mt->obj_field(_ptypes_offset);
3881 }
3882
3883 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3884 return ptypes(mt)->obj_at(idx);
3885 }
3886
3887 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3888 return ptypes(mt)->length();
3889 }
3890
3891 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3892 objArrayOop pts = ptypes(mt);
3893 int count = pts->length();
3894 int slots = 0;
3895 for (int i = 0; i < count; i++) {
3896 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3897 slots += type2size[bt];
3898 }
3899 return slots;
3900 }
3901
3902 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3903 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3904 return type2size[bt];
3905 }
3906
3907
3908 // Support for java_lang_invoke_CallSite
3909
3910 int java_lang_invoke_CallSite::_target_offset;
3911 int java_lang_invoke_CallSite::_context_offset;
3912
3913 #define CALLSITE_FIELDS_DO(macro) \
3914 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \
3915 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3916
3917 void java_lang_invoke_CallSite::compute_offsets() {
3918 InstanceKlass* k = SystemDictionary::CallSite_klass();
3919 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3920 }
3921
3922 #if INCLUDE_CDS
3923 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3924 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3925 }
3926 #endif
3927
3928 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3929 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3930
3931 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3932 return dep_oop;
3933 }
3934
3935 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3936
3937 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3938 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3939
3940 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3941 InstanceKlass* k = SystemDictionary::Context_klass();
3942 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3943 }
3944
3945 #if INCLUDE_CDS
3946 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3947 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3948 }
3949 #endif
3950
3951 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3952 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3953 nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3954 volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3955 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3956 return dep_ctx;
3957 }
3958
3959 // Support for java_security_AccessControlContext
3960
3961 int java_security_AccessControlContext::_context_offset = 0;
3962 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3963 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3964 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3965
3966 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3967 macro(_context_offset, k, "context", protectiondomain_signature, false); \
3968 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3969 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \
3970 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false)
3971
3972 void java_security_AccessControlContext::compute_offsets() {
3973 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3974 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3975 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3976 }
3977
3978 #if INCLUDE_CDS
3979 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3980 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3981 }
3982 #endif
3983
3984 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3985 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3986 // Ensure klass is initialized
3987 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3988 // Allocate result
3989 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3990 // Fill in values
3991 result->obj_field_put(_context_offset, context());
3992 result->obj_field_put(_privilegedContext_offset, privileged_context());
3993 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3994 // whitelist AccessControlContexts created by the JVM if present
3995 if (_isAuthorized_offset != -1) {
3996 result->bool_field_put(_isAuthorized_offset, true);
3997 }
3998 return result;
3999 }
4000
4001
4002 // Support for java_lang_ClassLoader
4003
4004 bool java_lang_ClassLoader::offsets_computed = false;
4005 int java_lang_ClassLoader::_loader_data_offset = -1;
4006 int java_lang_ClassLoader::parallelCapable_offset = -1;
4007 int java_lang_ClassLoader::name_offset = -1;
4008 int java_lang_ClassLoader::nameAndId_offset = -1;
4009 int java_lang_ClassLoader::unnamedModule_offset = -1;
4010
4011 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4012 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4013 return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
4014 }
4015
4016 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
4017 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4018 return RawAccess<>::load_at(loader, _loader_data_offset);
4019 }
4020
4021 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4022 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
4023 HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
4024 }
4025
4026 #define CLASSLOADER_FIELDS_DO(macro) \
4027 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \
4028 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \
4029 macro(nameAndId_offset, k1, "nameAndId", string_signature, false); \
4030 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \
4031 macro(parent_offset, k1, "parent", classloader_signature, false)
4032
4033 void java_lang_ClassLoader::compute_offsets() {
4034 assert(!offsets_computed, "offsets should be initialized only once");
4035 offsets_computed = true;
4036
4037 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4038 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4039
4040 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4041 }
4042
4043 #if INCLUDE_CDS
4044 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4045 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4046 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4047 }
4048 #endif
4049
4050 oop java_lang_ClassLoader::parent(oop loader) {
4051 assert(is_instance(loader), "loader must be oop");
4052 return loader->obj_field(parent_offset);
4053 }
4054
4055 // Returns the name field of this class loader. If the name field has not
4056 // been set, null will be returned.
4057 oop java_lang_ClassLoader::name(oop loader) {
4058 assert(is_instance(loader), "loader must be oop");
4059 return loader->obj_field(name_offset);
4060 }
4061
4062 // Returns the nameAndId field of this class loader. The format is
4063 // as follows:
4064 // If the defining loader has a name explicitly set then '<loader-name>' @<id>
4065 // If the defining loader has no name then <qualified-class-name> @<id>
4066 // If built-in loader, then omit '@<id>' as there is only one instance.
4067 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4068 oop java_lang_ClassLoader::nameAndId(oop loader) {
4069 assert(is_instance(loader), "loader must be oop");
4070 return loader->obj_field(nameAndId_offset);
4071 }
4072
4073 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4074 assert(is_instance(loader), "loader must be oop");
4075 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4076 oop acl = loader;
4077 debug_only(jint loop_count = 0);
4078 // This loop taken verbatim from ClassLoader.java:
4079 do {
4080 acl = parent(acl);
4081 if (cl == acl) {
4082 return true;
4083 }
4084 assert(++loop_count > 0, "loop_count overflow");
4085 } while (acl != NULL);
4086 return false;
4087 }
4088
4089 bool java_lang_ClassLoader::is_instance(oop obj) {
4090 return obj != NULL && is_subclass(obj->klass());
4091 }
4092
4093
4094 // For class loader classes, parallelCapable defined
4095 // based on non-null field
4096 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4097 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4098 if (parallelCapable_offset == -1) {
4099 // Default for backward compatibility is false
4100 return false;
4101 }
4102 return (class_loader->obj_field(parallelCapable_offset) != NULL);
4103 }
4104
4105 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4106 // Fix for 4474172; see evaluation for more details
4107 loader = non_reflection_class_loader(loader);
4108
4109 oop cl = SystemDictionary::java_system_loader();
4110 while(cl != NULL) {
4111 if (cl == loader) return true;
4112 cl = parent(cl);
4113 }
4114 return false;
4115 }
4116
4117 // Return true if this is one of the class loaders associated with
4118 // the generated bytecodes for reflection.
4119 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4120 if (loader != NULL) {
4121 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4122 // This might be null in non-1.4 JDKs
4123 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4124 }
4125 return false;
4126 }
4127
4128 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4129 // See whether this is one of the class loaders associated with
4130 // the generated bytecodes for reflection, and if so, "magically"
4131 // delegate to its parent to prevent class loading from occurring
4132 // in places where applications using reflection didn't expect it.
4133 if (is_reflection_class_loader(loader)) {
4134 return parent(loader);
4135 }
4136 return loader;
4137 }
4138
4139 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4140 assert(is_instance(loader), "loader must be oop");
4141 return loader->obj_field(unnamedModule_offset);
4142 }
4143
4144 // Support for java_lang_System
4145 //
4146 #define SYSTEM_FIELDS_DO(macro) \
4147 macro(static_in_offset, k, "in", input_stream_signature, true); \
4148 macro(static_out_offset, k, "out", print_stream_signature, true); \
4149 macro(static_err_offset, k, "err", print_stream_signature, true); \
4150 macro(static_security_offset, k, "security", security_manager_signature, true)
4151
4152 void java_lang_System::compute_offsets() {
4153 InstanceKlass* k = SystemDictionary::System_klass();
4154 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4155 }
4156
4157 #if INCLUDE_CDS
4158 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4159 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4160 }
4161 #endif
4162
4163 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4164 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4165 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4166
4167 // Support for jdk_internal_misc_UnsafeConstants
4168 //
4169 class UnsafeConstantsFixup : public FieldClosure {
4170 private:
4171 int _address_size;
4172 int _page_size;
4173 bool _big_endian;
4174 bool _use_unaligned_access;
4175 int _data_cache_line_flush_size;
4176 public:
4177 UnsafeConstantsFixup() {
4178 // round up values for all static final fields
4179 _address_size = sizeof(void*);
4180 _page_size = os::vm_page_size();
4181 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4182 _use_unaligned_access = UseUnalignedAccesses;
4183 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4184 }
4185
4186 void do_field(fieldDescriptor* fd) {
4187 oop mirror = fd->field_holder()->java_mirror();
4188 assert(mirror != NULL, "UnsafeConstants must have mirror already");
4189 assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4190 assert(fd->is_final(), "fields of UnsafeConstants must be final");
4191 assert(fd->is_static(), "fields of UnsafeConstants must be static");
4192 if (fd->name() == vmSymbols::address_size_name()) {
4193 mirror->int_field_put(fd->offset(), _address_size);
4194 } else if (fd->name() == vmSymbols::page_size_name()) {
4195 mirror->int_field_put(fd->offset(), _page_size);
4196 } else if (fd->name() == vmSymbols::big_endian_name()) {
4197 mirror->bool_field_put(fd->offset(), _big_endian);
4198 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4199 mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4200 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4201 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4202 } else {
4203 assert(false, "unexpected UnsafeConstants field");
4204 }
4205 }
4206 };
4207
4208 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4209 UnsafeConstantsFixup fixup;
4210 SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4211 }
4212
4213 int java_lang_Class::_klass_offset;
4214 int java_lang_Class::_array_klass_offset;
4215 int java_lang_Class::_oop_size_offset;
4216 int java_lang_Class::_static_oop_field_count_offset;
4217 int java_lang_Class::_class_loader_offset;
4218 int java_lang_Class::_module_offset;
4219 int java_lang_Class::_protection_domain_offset;
4220 int java_lang_Class::_component_mirror_offset;
4221 int java_lang_Class::_init_lock_offset;
4222 int java_lang_Class::_signers_offset;
4223 int java_lang_Class::_name_offset;
4224 int java_lang_Class::_source_file_offset;
4225 int java_lang_Class::_classData_offset;
4226 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4227 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4228 int java_lang_Throwable::backtrace_offset;
4229 int java_lang_Throwable::detailMessage_offset;
4230 int java_lang_Throwable::stackTrace_offset;
4231 int java_lang_Throwable::depth_offset;
4232 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4233 int java_lang_reflect_AccessibleObject::override_offset;
4234 int java_lang_reflect_Method::clazz_offset;
4235 int java_lang_reflect_Method::name_offset;
4236 int java_lang_reflect_Method::returnType_offset;
4237 int java_lang_reflect_Method::parameterTypes_offset;
4238 int java_lang_reflect_Method::exceptionTypes_offset;
4239 int java_lang_reflect_Method::slot_offset;
4240 int java_lang_reflect_Method::modifiers_offset;
4241 int java_lang_reflect_Method::signature_offset;
4242 int java_lang_reflect_Method::annotations_offset;
4243 int java_lang_reflect_Method::parameter_annotations_offset;
4244 int java_lang_reflect_Method::annotation_default_offset;
4245 int java_lang_reflect_Constructor::clazz_offset;
4246 int java_lang_reflect_Constructor::parameterTypes_offset;
4247 int java_lang_reflect_Constructor::exceptionTypes_offset;
4248 int java_lang_reflect_Constructor::slot_offset;
4249 int java_lang_reflect_Constructor::modifiers_offset;
4250 int java_lang_reflect_Constructor::signature_offset;
4251 int java_lang_reflect_Constructor::annotations_offset;
4252 int java_lang_reflect_Constructor::parameter_annotations_offset;
4253 int java_lang_reflect_Field::clazz_offset;
4254 int java_lang_reflect_Field::name_offset;
4255 int java_lang_reflect_Field::type_offset;
4256 int java_lang_reflect_Field::slot_offset;
4257 int java_lang_reflect_Field::modifiers_offset;
4258 int java_lang_reflect_Field::signature_offset;
4259 int java_lang_reflect_Field::annotations_offset;
4260 int java_lang_reflect_Parameter::name_offset;
4261 int java_lang_reflect_Parameter::modifiers_offset;
4262 int java_lang_reflect_Parameter::index_offset;
4263 int java_lang_reflect_Parameter::executable_offset;
4264 int java_lang_boxing_object::value_offset;
4265 int java_lang_boxing_object::long_value_offset;
4266 int java_lang_ref_Reference::referent_offset;
4267 int java_lang_ref_Reference::queue_offset;
4268 int java_lang_ref_Reference::next_offset;
4269 int java_lang_ref_Reference::discovered_offset;
4270 int java_lang_ref_SoftReference::timestamp_offset;
4271 int java_lang_ref_SoftReference::static_clock_offset;
4272 int java_lang_ClassLoader::parent_offset;
4273 int java_lang_System::static_in_offset;
4274 int java_lang_System::static_out_offset;
4275 int java_lang_System::static_err_offset;
4276 int java_lang_System::static_security_offset;
4277 int java_lang_StackTraceElement::methodName_offset;
4278 int java_lang_StackTraceElement::fileName_offset;
4279 int java_lang_StackTraceElement::lineNumber_offset;
4280 int java_lang_StackTraceElement::moduleName_offset;
4281 int java_lang_StackTraceElement::moduleVersion_offset;
4282 int java_lang_StackTraceElement::classLoaderName_offset;
4283 int java_lang_StackTraceElement::declaringClass_offset;
4284 int java_lang_StackTraceElement::declaringClassObject_offset;
4285 int java_lang_StackFrameInfo::_memberName_offset;
4286 int java_lang_StackFrameInfo::_bci_offset;
4287 int java_lang_StackFrameInfo::_version_offset;
4288 int java_lang_LiveStackFrameInfo::_monitors_offset;
4289 int java_lang_LiveStackFrameInfo::_locals_offset;
4290 int java_lang_LiveStackFrameInfo::_operands_offset;
4291 int java_lang_LiveStackFrameInfo::_mode_offset;
4292 int java_lang_AssertionStatusDirectives::classes_offset;
4293 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4294 int java_lang_AssertionStatusDirectives::packages_offset;
4295 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4296 int java_lang_AssertionStatusDirectives::deflt_offset;
4297 int java_nio_Buffer::_limit_offset;
4298 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4299 int reflect_ConstantPool::_oop_offset;
4300 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4301 int java_lang_Integer_IntegerCache::_static_cache_offset;
4302 int java_lang_Long_LongCache::_static_cache_offset;
4303 int java_lang_Character_CharacterCache::_static_cache_offset;
4304 int java_lang_Short_ShortCache::_static_cache_offset;
4305 int java_lang_Byte_ByteCache::_static_cache_offset;
4306 int java_lang_Boolean::_static_TRUE_offset;
4307 int java_lang_Boolean::_static_FALSE_offset;
4308
4309
4310
4311 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4312 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \
4313 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4314 macro(moduleName_offset, k, "moduleName", string_signature, false); \
4315 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \
4316 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \
4317 macro(methodName_offset, k, "methodName", string_signature, false); \
4318 macro(fileName_offset, k, "fileName", string_signature, false); \
4319 macro(lineNumber_offset, k, "lineNumber", int_signature, false)
4320
4321 // Support for java_lang_StackTraceElement
4322 void java_lang_StackTraceElement::compute_offsets() {
4323 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4324 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4325 }
4326
4327 #if INCLUDE_CDS
4328 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4329 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4330 }
4331 #endif
4332
4333 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4334 element->obj_field_put(fileName_offset, value);
4335 }
4336
4337 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4338 element->obj_field_put(declaringClass_offset, value);
4339 }
4340
4341 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4342 element->obj_field_put(methodName_offset, value);
4343 }
4344
4345 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4346 element->int_field_put(lineNumber_offset, value);
4347 }
4348
4349 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4350 element->obj_field_put(moduleName_offset, value);
4351 }
4352
4353 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4354 element->obj_field_put(moduleVersion_offset, value);
4355 }
4356
4357 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4358 element->obj_field_put(classLoaderName_offset, value);
4359 }
4360
4361 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4362 element->obj_field_put(declaringClassObject_offset, value);
4363 }
4364
4365 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4366 element->short_field_put(_version_offset, value);
4367 }
4368
4369 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4370 assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4371 element->int_field_put(_bci_offset, value);
4372 }
4373
4374 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4375 element->obj_field_put(_monitors_offset, value);
4376 }
4377
4378 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4379 element->obj_field_put(_locals_offset, value);
4380 }
4381
4382 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4383 element->obj_field_put(_operands_offset, value);
4384 }
4385
4386 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4387 element->int_field_put(_mode_offset, value);
4388 }
4389
4390 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4391 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4392 macro(classes_offset, k, "classes", string_array_signature, false); \
4393 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \
4394 macro(packages_offset, k, "packages", string_array_signature, false); \
4395 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \
4396 macro(deflt_offset, k, "deflt", bool_signature, false)
4397
4398 void java_lang_AssertionStatusDirectives::compute_offsets() {
4399 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4400 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4401 }
4402
4403 #if INCLUDE_CDS
4404 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4405 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4406 }
4407 #endif
4408
4409 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4410 o->obj_field_put(classes_offset, val);
4411 }
4412
4413 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4414 o->obj_field_put(classEnabled_offset, val);
4415 }
4416
4417 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4418 o->obj_field_put(packages_offset, val);
4419 }
4420
4421 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4422 o->obj_field_put(packageEnabled_offset, val);
4423 }
4424
4425 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4426 o->bool_field_put(deflt_offset, val);
4427 }
4428
4429
4430 // Support for intrinsification of java.nio.Buffer.checkIndex
4431 int java_nio_Buffer::limit_offset() {
4432 return _limit_offset;
4433 }
4434
4435 #define BUFFER_FIELDS_DO(macro) \
4436 macro(_limit_offset, k, "limit", int_signature, false)
4437
4438 void java_nio_Buffer::compute_offsets() {
4439 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4440 assert(k != NULL, "must be loaded in 1.4+");
4441 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4442 }
4443
4444 #if INCLUDE_CDS
4445 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4446 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4447 }
4448 #endif
4449
4450 #define AOS_FIELDS_DO(macro) \
4451 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4452
4453 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4454 InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4455 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4456 }
4457
4458 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4459 assert(_owner_offset != 0, "Must be initialized");
4460 return obj->obj_field(_owner_offset);
4461 }
4462
4463 #if INCLUDE_CDS
4464 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4465 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4466 }
4467 #endif
4468
4469 #define INTEGER_CACHE_FIELDS_DO(macro) \
4470 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4471
4472 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4473 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4474 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4475 }
4476
4477 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4478 oop base = ik->static_field_base_raw();
4479 return objArrayOop(base->obj_field(_static_cache_offset));
4480 }
4481
4482 Symbol* java_lang_Integer_IntegerCache::symbol() {
4483 return vmSymbols::java_lang_Integer_IntegerCache();
4484 }
4485
4486 #if INCLUDE_CDS
4487 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4488 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4489 }
4490 #endif
4491 #undef INTEGER_CACHE_FIELDS_DO
4492
4493 jint java_lang_Integer::value(oop obj) {
4494 jvalue v;
4495 java_lang_boxing_object::get_value(obj, &v);
4496 return v.i;
4497 }
4498
4499 #define LONG_CACHE_FIELDS_DO(macro) \
4500 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4501
4502 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4503 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4504 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4505 }
4506
4507 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4508 oop base = ik->static_field_base_raw();
4509 return objArrayOop(base->obj_field(_static_cache_offset));
4510 }
4511
4512 Symbol* java_lang_Long_LongCache::symbol() {
4513 return vmSymbols::java_lang_Long_LongCache();
4514 }
4515
4516 #if INCLUDE_CDS
4517 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4518 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4519 }
4520 #endif
4521 #undef LONG_CACHE_FIELDS_DO
4522
4523 jlong java_lang_Long::value(oop obj) {
4524 jvalue v;
4525 java_lang_boxing_object::get_value(obj, &v);
4526 return v.j;
4527 }
4528
4529 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4530 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4531
4532 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4533 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4534 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4535 }
4536
4537 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4538 oop base = ik->static_field_base_raw();
4539 return objArrayOop(base->obj_field(_static_cache_offset));
4540 }
4541
4542 Symbol* java_lang_Character_CharacterCache::symbol() {
4543 return vmSymbols::java_lang_Character_CharacterCache();
4544 }
4545
4546 #if INCLUDE_CDS
4547 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4548 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4549 }
4550 #endif
4551 #undef CHARACTER_CACHE_FIELDS_DO
4552
4553 jchar java_lang_Character::value(oop obj) {
4554 jvalue v;
4555 java_lang_boxing_object::get_value(obj, &v);
4556 return v.c;
4557 }
4558
4559 #define SHORT_CACHE_FIELDS_DO(macro) \
4560 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4561
4562 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4563 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4564 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4565 }
4566
4567 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4568 oop base = ik->static_field_base_raw();
4569 return objArrayOop(base->obj_field(_static_cache_offset));
4570 }
4571
4572 Symbol* java_lang_Short_ShortCache::symbol() {
4573 return vmSymbols::java_lang_Short_ShortCache();
4574 }
4575
4576 #if INCLUDE_CDS
4577 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4578 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4579 }
4580 #endif
4581 #undef SHORT_CACHE_FIELDS_DO
4582
4583 jshort java_lang_Short::value(oop obj) {
4584 jvalue v;
4585 java_lang_boxing_object::get_value(obj, &v);
4586 return v.s;
4587 }
4588
4589 #define BYTE_CACHE_FIELDS_DO(macro) \
4590 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4591
4592 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4593 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4594 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4595 }
4596
4597 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4598 oop base = ik->static_field_base_raw();
4599 return objArrayOop(base->obj_field(_static_cache_offset));
4600 }
4601
4602 Symbol* java_lang_Byte_ByteCache::symbol() {
4603 return vmSymbols::java_lang_Byte_ByteCache();
4604 }
4605
4606 #if INCLUDE_CDS
4607 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4608 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4609 }
4610 #endif
4611 #undef BYTE_CACHE_FIELDS_DO
4612
4613 jbyte java_lang_Byte::value(oop obj) {
4614 jvalue v;
4615 java_lang_boxing_object::get_value(obj, &v);
4616 return v.b;
4617 }
4618 #define BOOLEAN_FIELDS_DO(macro) \
4619 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4620 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4621
4622
4623 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4624 guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4625 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4626 }
4627
4628 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4629 oop base = ik->static_field_base_raw();
4630 return base->obj_field(_static_TRUE_offset);
4631 }
4632
4633 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4634 oop base = ik->static_field_base_raw();
4635 return base->obj_field(_static_FALSE_offset);
4636 }
4637
4638 Symbol* java_lang_Boolean::symbol() {
4639 return vmSymbols::java_lang_Boolean();
4640 }
4641
4642 #if INCLUDE_CDS
4643 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4644 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4645 }
4646 #endif
4647 #undef BOOLEAN_CACHE_FIELDS_DO
4648
4649 jboolean java_lang_Boolean::value(oop obj) {
4650 jvalue v;
4651 java_lang_boxing_object::get_value(obj, &v);
4652 return v.z;
4653 }
4654
4655 static int member_offset(int hardcoded_offset) {
4656 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4657 }
4658
4659 // Compute hard-coded offsets
4660 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4661 // are not available to determine the offset_of_static_fields.
4662 void JavaClasses::compute_hard_coded_offsets() {
4663
4664 // java_lang_boxing_object
4665 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
4666 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4667
4668 // java_lang_ref_Reference
4669 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
4670 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
4671 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
4672 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4673 }
4674
4675 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4676
4677 // Compute non-hard-coded field offsets of all the classes in this file
4678 void JavaClasses::compute_offsets() {
4679 if (UseSharedSpaces) {
4680 assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4681 JvmtiExport::has_early_class_hook_env()),
4682 "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4683 // None of the classes used by the rest of this function can be replaced by
4684 // JMVTI ClassFileLoadHook.
4685 // We are safe to use the archived offsets, which have already been restored
4686 // by JavaClasses::serialize_offsets, without computing the offsets again.
4687 return;
4688 }
4689
4690 // We have already called the compute_offsets() of the
4691 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4692 // earlier inside SystemDictionary::resolve_well_known_classes()
4693 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4694 }
4695
4696 #if INCLUDE_CDS
4697 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4698
4699 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4700 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4701 }
4702 #endif
4703
4704 #if INCLUDE_CDS_JAVA_HEAP
4705 bool JavaClasses::is_supported_for_archiving(oop obj) {
4706 Klass* klass = obj->klass();
4707
4708 if (klass == SystemDictionary::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed.
4709 klass == SystemDictionary::Module_klass() || // Module::module_entry is malloc'ed
4710 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
4711 // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes
4712 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
4713 // So for now we cannot not support these classes for archiving.
4714 //
4715 // These objects typically are not referenced by static fields, but rather by resolved
4716 // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
4717 klass == SystemDictionary::ResolvedMethodName_klass() ||
4718 klass == SystemDictionary::MemberName_klass() ||
4719 klass == SystemDictionary::Context_klass()) {
4720 return false;
4721 }
4722
4723 return true;
4724 }
4725 #endif
4726
4727 #ifndef PRODUCT
4728
4729 // These functions exist to assert the validity of hard-coded field offsets to guard
4730 // against changes in the class files
4731
4732 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4733 EXCEPTION_MARK;
4734 fieldDescriptor fd;
4735 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4736 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4737 InstanceKlass* ik = InstanceKlass::cast(k);
4738 TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4739 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig);
4740 if (!ik->find_local_field(f_name, f_sig, &fd)) {
4741 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4742 return false;
4743 }
4744 if (fd.is_static()) {
4745 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4746 return false;
4747 }
4748 if (fd.offset() == hardcoded_offset ) {
4749 return true;
4750 } else {
4751 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4752 klass_name, field_name, hardcoded_offset, fd.offset());
4753 return false;
4754 }
4755 }
4756
4757 // Check the hard-coded field offsets of all the classes in this file
4758
4759 void JavaClasses::check_offsets() {
4760 bool valid = true;
4761
4762 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4763 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4764
4765 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4766 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4767
4768 // Boxed primitive objects (java_lang_boxing_object)
4769
4770 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
4771 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4772 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
4773 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4774 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
4775 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
4776 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
4777 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4778
4779 // java.lang.ref.Reference
4780
4781 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4782 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4783 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4784 // Fake field
4785 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4786
4787 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4788 }
4789
4790 #endif // PRODUCT
4791
4792 int InjectedField::compute_offset() {
4793 InstanceKlass* ik = InstanceKlass::cast(klass());
4794 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4795 if (!may_be_java && !fs.access_flags().is_internal()) {
4796 // Only look at injected fields
4797 continue;
4798 }
4799 if (fs.name() == name() && fs.signature() == signature()) {
4800 return fs.offset();
4801 }
4802 }
4803 ResourceMark rm;
4804 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)" : "");
4805 #ifndef PRODUCT
4806 ik->print();
4807 tty->print_cr("all fields:");
4808 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4809 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4810 }
4811 #endif //PRODUCT
4812 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4813 return -1;
4814 }
4815
4816 void javaClasses_init() {
4817 JavaClasses::compute_offsets();
4818 JavaClasses::check_offsets();
4819 FilteredFieldsMap::initialize(); // must be done after computing offsets.
4820 }