1 /*
2 * Copyright (c) 1997, 2021, 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 "jvm.h"
27 #include "cds/classListParser.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/dynamicArchive.hpp"
30 #include "cds/heapShared.hpp"
31 #include "cds/lambdaFormInvokers.hpp"
32 #include "classfile/classFileStream.hpp"
33 #include "classfile/classLoader.hpp"
34 #include "classfile/classLoaderData.hpp"
35 #include "classfile/classLoaderData.inline.hpp"
36 #include "classfile/classLoadInfo.hpp"
37 #include "classfile/javaAssertions.hpp"
38 #include "classfile/javaClasses.inline.hpp"
39 #include "classfile/moduleEntry.hpp"
40 #include "classfile/modules.hpp"
41 #include "classfile/packageEntry.hpp"
42 #include "classfile/stringTable.hpp"
43 #include "classfile/symbolTable.hpp"
44 #include "classfile/systemDictionary.hpp"
45 #include "classfile/vmClasses.hpp"
46 #include "classfile/vmSymbols.hpp"
47 #include "gc/shared/collectedHeap.inline.hpp"
48 #include "interpreter/bytecode.hpp"
49 #include "interpreter/bytecodeUtils.hpp"
50 #include "jfr/jfrEvents.hpp"
51 #include "logging/log.hpp"
52 #include "memory/oopFactory.hpp"
53 #include "memory/referenceType.hpp"
54 #include "memory/resourceArea.hpp"
55 #include "memory/universe.hpp"
56 #include "oops/access.inline.hpp"
57 #include "oops/constantPool.hpp"
58 #include "oops/fieldStreams.inline.hpp"
59 #include "oops/flatArrayKlass.hpp"
60 #include "oops/instanceKlass.hpp"
61 #include "oops/klass.inline.hpp"
62 #include "oops/method.hpp"
63 #include "oops/recordComponent.hpp"
64 #include "oops/objArrayKlass.hpp"
65 #include "oops/objArrayOop.inline.hpp"
66 #include "oops/oop.inline.hpp"
67 #include "prims/jvm_misc.hpp"
68 #include "prims/jvmtiExport.hpp"
69 #include "prims/jvmtiThreadState.hpp"
70 #include "prims/stackwalk.hpp"
71 #include "runtime/arguments.hpp"
72 #include "runtime/atomic.hpp"
73 #include "runtime/globals_extension.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/init.hpp"
76 #include "runtime/interfaceSupport.inline.hpp"
77 #include "runtime/deoptimization.hpp"
78 #include "runtime/handshake.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/jfieldIDWorkaround.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/os.inline.hpp"
84 #include "runtime/osThread.hpp"
85 #include "runtime/perfData.hpp"
86 #include "runtime/reflection.hpp"
87 #include "runtime/synchronizer.hpp"
88 #include "runtime/thread.inline.hpp"
89 #include "runtime/threadSMR.hpp"
90 #include "runtime/vframe.inline.hpp"
91 #include "runtime/vmOperations.hpp"
92 #include "runtime/vm_version.hpp"
93 #include "services/attachListener.hpp"
94 #include "services/management.hpp"
95 #include "services/threadService.hpp"
96 #include "utilities/copy.hpp"
97 #include "utilities/defaultStream.hpp"
98 #include "utilities/dtrace.hpp"
99 #include "utilities/events.hpp"
100 #include "utilities/macros.hpp"
101 #include "utilities/utf8.hpp"
102 #if INCLUDE_CDS
103 #include "classfile/systemDictionaryShared.hpp"
104 #endif
105 #if INCLUDE_JFR
106 #include "jfr/jfr.hpp"
107 #endif
108
109 #include <errno.h>
110
111 /*
112 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
113 such ctors and calls MUST NOT come between an oop declaration/init and its
114 usage because if objects are move this may cause various memory stomps, bus
115 errors and segfaults. Here is a cookbook for causing so called "naked oop
116 failures":
117
118 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
119 // Object address to be held directly in mirror & not visible to GC
120 oop mirror = JNIHandles::resolve_non_null(ofClass);
121
122 // If this ctor can hit a safepoint, moving objects around, then
123 ComplexConstructor foo;
124
125 // Boom! mirror may point to JUNK instead of the intended object
126 (some dereference of mirror)
127
128 // Here's another call that may block for GC, making mirror stale
129 MutexLocker ml(some_lock);
130
131 // And here's an initializer that can result in a stale oop
132 // all in one step.
133 oop o = call_that_can_throw_exception(TRAPS);
134
135
136 The solution is to keep the oop declaration BELOW the ctor or function
137 call that might cause a GC, do another resolve to reassign the oop, or
138 consider use of a Handle instead of an oop so there is immunity from object
139 motion. But note that the "QUICK" entries below do not have a handlemark
140 and thus can only support use of handles passed in.
141 */
142
143 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
144 ResourceMark rm;
145 int line_number = -1;
146 const char * source_file = NULL;
147 const char * trace = "explicit";
148 InstanceKlass* caller = NULL;
149 JavaThread* jthread = THREAD;
150 if (jthread->has_last_Java_frame()) {
151 vframeStream vfst(jthread);
152
153 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
154 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
155 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
156 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
157 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
158
159 Method* last_caller = NULL;
160
161 while (!vfst.at_end()) {
162 Method* m = vfst.method();
163 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())&&
164 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
165 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
166 break;
167 }
168 last_caller = m;
169 vfst.next();
170 }
171 // if this is called from Class.forName0 and that is called from Class.forName,
172 // then print the caller of Class.forName. If this is Class.loadClass, then print
173 // that caller, otherwise keep quiet since this should be picked up elsewhere.
174 bool found_it = false;
175 if (!vfst.at_end() &&
176 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
177 vfst.method()->name() == vmSymbols::forName0_name()) {
178 vfst.next();
179 if (!vfst.at_end() &&
180 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
181 vfst.method()->name() == vmSymbols::forName_name()) {
182 vfst.next();
183 found_it = true;
184 }
185 } else if (last_caller != NULL &&
186 last_caller->method_holder()->name() ==
187 vmSymbols::java_lang_ClassLoader() &&
188 last_caller->name() == vmSymbols::loadClass_name()) {
189 found_it = true;
190 } else if (!vfst.at_end()) {
191 if (vfst.method()->is_native()) {
192 // JNI call
193 found_it = true;
194 }
195 }
196 if (found_it && !vfst.at_end()) {
197 // found the caller
198 caller = vfst.method()->method_holder();
199 line_number = vfst.method()->line_number_from_bci(vfst.bci());
200 if (line_number == -1) {
201 // show method name if it's a native method
202 trace = vfst.method()->name_and_sig_as_C_string();
203 }
204 Symbol* s = caller->source_file_name();
205 if (s != NULL) {
206 source_file = s->as_C_string();
207 }
208 }
209 }
210 if (caller != NULL) {
211 if (to_class != caller) {
212 const char * from = caller->external_name();
213 const char * to = to_class->external_name();
214 // print in a single call to reduce interleaving between threads
215 if (source_file != NULL) {
216 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
217 } else {
218 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
219 }
220 }
221 }
222 }
223
224 void trace_class_resolution(Klass* to_class) {
225 EXCEPTION_MARK;
226 trace_class_resolution_impl(to_class, THREAD);
227 if (HAS_PENDING_EXCEPTION) {
228 CLEAR_PENDING_EXCEPTION;
229 }
230 }
231
232 // java.lang.System //////////////////////////////////////////////////////////////////////
233
234
235 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
236 return os::javaTimeMillis();
237 JVM_END
238
239 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
240 return os::javaTimeNanos();
241 JVM_END
242
243 // The function below is actually exposed by jdk.internal.misc.VM and not
244 // java.lang.System, but we choose to keep it here so that it stays next
245 // to JVM_CurrentTimeMillis and JVM_NanoTime
246
247 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
248 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
249
250 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
251 jlong seconds;
252 jlong nanos;
253
254 os::javaTimeSystemUTC(seconds, nanos);
255
256 // We're going to verify that the result can fit in a long.
257 // For that we need the difference in seconds between 'seconds'
258 // and 'offset_secs' to be such that:
259 // |seconds - offset_secs| < (2^63/10^9)
260 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
261 // which makes |seconds - offset_secs| < 2^33
262 // and we will prefer +/- 2^32 as the maximum acceptable diff
263 // as 2^32 has a more natural feel than 2^33...
264 //
265 // So if |seconds - offset_secs| >= 2^32 - we return a special
266 // sentinel value (-1) which the caller should take as an
267 // exception value indicating that the offset given to us is
268 // too far from range of the current time - leading to too big
269 // a nano adjustment. The caller is expected to recover by
270 // computing a more accurate offset and calling this method
271 // again. (For the record 2^32 secs is ~136 years, so that
272 // should rarely happen)
273 //
274 jlong diff = seconds - offset_secs;
275 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
276 return -1; // sentinel value: the offset is too far off the target
277 }
278
279 // return the adjustment. If you compute a time by adding
280 // this number of nanoseconds along with the number of seconds
281 // in the offset you should get the current UTC time.
282 return (diff * (jlong)1000000000) + nanos;
283 JVM_END
284
285 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
286 jobject dst, jint dst_pos, jint length))
287 // Check if we have null pointers
288 if (src == NULL || dst == NULL) {
289 THROW(vmSymbols::java_lang_NullPointerException());
290 }
291 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
292 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
293 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
294 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
295 // Do copy
296 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
297 JVM_END
298
299
300 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
301 JavaValue r(T_OBJECT);
302 // public synchronized Object put(Object key, Object value);
303 HandleMark hm(THREAD);
304 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
305 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
306 JavaCalls::call_virtual(&r,
307 props,
308 vmClasses::Properties_klass(),
309 vmSymbols::put_name(),
310 vmSymbols::object_object_object_signature(),
311 key_str,
312 value_str,
313 THREAD);
314 }
315
316
317 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
318
319 /*
320 * Return all of the system properties in a Java String array with alternating
321 * names and values from the jvm SystemProperty.
322 * Which includes some internal and all commandline -D defined properties.
323 */
324 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
325 ResourceMark rm(THREAD);
326 HandleMark hm(THREAD);
327 int ndx = 0;
328 int fixedCount = 2;
329
330 SystemProperty* p = Arguments::system_properties();
331 int count = Arguments::PropertyList_count(p);
332
333 // Allocate result String array
334 InstanceKlass* ik = vmClasses::String_klass();
335 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
336 objArrayHandle result_h(THREAD, r);
337
338 while (p != NULL) {
339 const char * key = p->key();
340 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
341 const char * value = p->value();
342 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
343 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
344 result_h->obj_at_put(ndx * 2, key_str());
345 result_h->obj_at_put(ndx * 2 + 1, value_str());
346 ndx++;
347 }
348 p = p->next();
349 }
350
351 // Convert the -XX:MaxDirectMemorySize= command line flag
352 // to the sun.nio.MaxDirectMemorySize property.
353 // Do this after setting user properties to prevent people
354 // from setting the value with a -D option, as requested.
355 // Leave empty if not supplied
356 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
357 char as_chars[256];
358 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
359 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
360 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
361 result_h->obj_at_put(ndx * 2, key_str());
362 result_h->obj_at_put(ndx * 2 + 1, value_str());
363 ndx++;
364 }
365
366 // JVM monitoring and management support
367 // Add the sun.management.compiler property for the compiler's name
368 {
369 #undef CSIZE
370 #if defined(_LP64) || defined(_WIN64)
371 #define CSIZE "64-Bit "
372 #else
373 #define CSIZE
374 #endif // 64bit
375
376 #if COMPILER1_AND_COMPILER2
377 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
378 #else
379 #if defined(COMPILER1)
380 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
381 #elif defined(COMPILER2)
382 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
383 #elif INCLUDE_JVMCI
384 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
385 #else
386 const char* compiler_name = "";
387 #endif // compilers
388 #endif // COMPILER1_AND_COMPILER2
389
390 if (*compiler_name != '\0' &&
391 (Arguments::mode() != Arguments::_int)) {
392 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
393 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
394 result_h->obj_at_put(ndx * 2, key_str());
395 result_h->obj_at_put(ndx * 2 + 1, value_str());
396 ndx++;
397 }
398 }
399
400 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
401 JVM_END
402
403
404 /*
405 * Return the temporary directory that the VM uses for the attach
406 * and perf data files.
407 *
408 * It is important that this directory is well-known and the
409 * same for all VM instances. It cannot be affected by configuration
410 * variables such as java.io.tmpdir.
411 */
412 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
413 HandleMark hm(THREAD);
414 const char* temp_dir = os::get_temp_directory();
415 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
416 return (jstring) JNIHandles::make_local(THREAD, h());
417 JVM_END
418
419
420 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
421
422 extern volatile jint vm_created;
423
424 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
425 #if INCLUDE_CDS
426 // Link all classes for dynamic CDS dumping before vm exit.
427 if (DynamicDumpSharedSpaces) {
428 DynamicArchive::prepare_for_dynamic_dumping();
429 }
430 #endif
431 EventShutdown event;
432 if (event.should_commit()) {
433 event.set_reason("Shutdown requested from Java");
434 event.commit();
435 }
436 JVM_END
437
438
439 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
440 before_exit(thread);
441 vm_exit(code);
442 JVM_END
443
444
445 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
446 if (!DisableExplicitGC) {
447 EventSystemGC event;
448 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
449 Universe::heap()->collect(GCCause::_java_lang_system_gc);
450 event.commit();
451 }
452 JVM_END
453
454
455 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
456 return Universe::heap()->millis_since_last_whole_heap_examined();
457 JVM_END
458
459
460 static inline jlong convert_size_t_to_jlong(size_t val) {
461 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
462 NOT_LP64 (return (jlong)val;)
463 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
464 }
465
466 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
467 size_t n = Universe::heap()->capacity();
468 return convert_size_t_to_jlong(n);
469 JVM_END
470
471
472 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
473 size_t n = Universe::heap()->unused();
474 return convert_size_t_to_jlong(n);
475 JVM_END
476
477
478 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
479 size_t n = Universe::heap()->max_capacity();
480 return convert_size_t_to_jlong(n);
481 JVM_END
482
483
484 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
485 return os::active_processor_count();
486 JVM_END
487
488 JVM_ENTRY_NO_ENV(jboolean, JVM_IsUseContainerSupport(void))
489 #ifdef LINUX
490 if (UseContainerSupport) {
491 return JNI_TRUE;
492 }
493 #endif
494 return JNI_FALSE;
495 JVM_END
496
497 // java.lang.Throwable //////////////////////////////////////////////////////
498
499 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
500 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
501 java_lang_Throwable::fill_in_stack_trace(exception);
502 JVM_END
503
504 // java.lang.NullPointerException ///////////////////////////////////////////
505
506 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
507 if (!ShowCodeDetailsInExceptionMessages) return NULL;
508
509 oop exc = JNIHandles::resolve_non_null(throwable);
510
511 Method* method;
512 int bci;
513 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
514 return NULL;
515 }
516 if (method->is_native()) {
517 return NULL;
518 }
519
520 stringStream ss;
521 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
522 if (ok) {
523 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
524 return (jstring) JNIHandles::make_local(THREAD, result);
525 } else {
526 return NULL;
527 }
528 JVM_END
529
530 // java.lang.StackTraceElement //////////////////////////////////////////////
531
532
533 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
534 Handle exception(THREAD, JNIHandles::resolve(throwable));
535 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
536 objArrayHandle stack_trace(THREAD, st);
537 // Fill in the allocated stack trace
538 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
539 JVM_END
540
541
542 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
543 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
544 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
545 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
546 JVM_END
547
548
549 // java.lang.StackWalker //////////////////////////////////////////////////////
550
551
552 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
553 jint skip_frames, jint frame_count, jint start_index,
554 jobjectArray frames))
555 if (!thread->has_last_Java_frame()) {
556 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
557 }
558
559 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
560
561 // frames array is a Class<?>[] array when only getting caller reference,
562 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
563 // be null.
564 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
565 objArrayHandle frames_array_h(THREAD, fa);
566
567 int limit = start_index + frame_count;
568 if (frames_array_h->length() < limit) {
569 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
570 }
571
572 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
573 start_index, frames_array_h, CHECK_NULL);
574 return JNIHandles::make_local(THREAD, result);
575 JVM_END
576
577
578 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
579 jint frame_count, jint start_index,
580 jobjectArray frames))
581 // frames array is a Class<?>[] array when only getting caller reference,
582 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
583 // be null.
584 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
585 objArrayHandle frames_array_h(THREAD, fa);
586
587 int limit = start_index+frame_count;
588 if (frames_array_h->length() < limit) {
589 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
590 }
591
592 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
593 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
594 start_index, frames_array_h, THREAD);
595 JVM_END
596
597 // java.lang.Object ///////////////////////////////////////////////
598
599
600 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
601 // as implemented in the classic virtual machine; return 0 if object is NULL
602 if (handle == NULL) {
603 return 0;
604 }
605 oop obj = JNIHandles::resolve_non_null(handle);
606 if (EnableValhalla && obj->klass()->is_inline_klass()) {
607 JavaValue result(T_INT);
608 JavaCallArguments args;
609 Handle ho(THREAD, obj);
610 args.push_oop(ho);
611 methodHandle method(THREAD, Universe::primitive_type_hash_code_method());
612 JavaCalls::call(&result, method, &args, THREAD);
613 if (HAS_PENDING_EXCEPTION) {
614 if (!PENDING_EXCEPTION->is_a(vmClasses::Error_klass())) {
615 Handle e(THREAD, PENDING_EXCEPTION);
616 CLEAR_PENDING_EXCEPTION;
617 THROW_MSG_CAUSE_(vmSymbols::java_lang_InternalError(), "Internal error in hashCode", e, false);
618 }
619 }
620 return result.get_jint();
621 } else {
622 return ObjectSynchronizer::FastHashCode(THREAD, obj);
623 }
624 JVM_END
625
626
627 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
628 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
629 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
630 if (JvmtiExport::should_post_monitor_wait()) {
631 JvmtiExport::post_monitor_wait(thread, obj(), ms);
632
633 // The current thread already owns the monitor and it has not yet
634 // been added to the wait queue so the current thread cannot be
635 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
636 // event handler cannot accidentally consume an unpark() meant for
637 // the ParkEvent associated with this ObjectMonitor.
638 }
639 ObjectSynchronizer::wait(obj, ms, CHECK);
640 JVM_END
641
642
643 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
644 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
645 ObjectSynchronizer::notify(obj, CHECK);
646 JVM_END
647
648
649 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
650 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
651 ObjectSynchronizer::notifyall(obj, CHECK);
652 JVM_END
653
654
655 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
656 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
657 Klass* klass = obj->klass();
658 JvmtiVMObjectAllocEventCollector oam;
659
660 #ifdef ASSERT
661 // Just checking that the cloneable flag is set correct
662 if (obj->is_array()) {
663 guarantee(klass->is_cloneable(), "all arrays are cloneable");
664 } else {
665 guarantee(obj->is_instance(), "should be instanceOop");
666 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
667 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
668 }
669 #endif
670
671 // Check if class of obj supports the Cloneable interface.
672 // All arrays are considered to be cloneable (See JLS 20.1.5).
673 // All j.l.r.Reference classes are considered non-cloneable.
674 if (!klass->is_cloneable() ||
675 klass->is_inline_klass() ||
676 (klass->is_instance_klass() &&
677 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
678 ResourceMark rm(THREAD);
679 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
680 }
681
682 // Make shallow object copy
683 const int size = obj->size();
684 oop new_obj_oop = NULL;
685 if (obj->is_array()) {
686 const int length = ((arrayOop)obj())->length();
687 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
688 /* do_zero */ true, CHECK_NULL);
689 } else {
690 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
691 }
692
693 HeapAccess<>::clone(obj(), new_obj_oop, size);
694
695 Handle new_obj(THREAD, new_obj_oop);
696 // Caution: this involves a java upcall, so the clone should be
697 // "gc-robust" by this stage.
698 if (klass->has_finalizer()) {
699 assert(obj->is_instance(), "should be instanceOop");
700 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
701 new_obj = Handle(THREAD, new_obj_oop);
702 }
703
704 return JNIHandles::make_local(THREAD, new_obj());
705 JVM_END
706
707 // java.io.File ///////////////////////////////////////////////////////////////
708
709 JVM_LEAF(char*, JVM_NativePath(char* path))
710 return os::native_path(path);
711 JVM_END
712
713
714 // Misc. class handling ///////////////////////////////////////////////////////////
715
716
717 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
718 // Getting the class of the caller frame.
719 //
720 // The call stack at this point looks something like this:
721 //
722 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
723 // [1] [ @CallerSensitive API.method ]
724 // [.] [ (skipped intermediate frames) ]
725 // [n] [ caller ]
726 vframeStream vfst(thread);
727 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
728 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
729 Method* m = vfst.method();
730 assert(m != NULL, "sanity");
731 switch (n) {
732 case 0:
733 // This must only be called from Reflection.getCallerClass
734 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
735 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
736 }
737 // fall-through
738 case 1:
739 // Frame 0 and 1 must be caller sensitive.
740 if (!m->caller_sensitive()) {
741 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
742 }
743 break;
744 default:
745 if (!m->is_ignored_by_security_stack_walk()) {
746 // We have reached the desired frame; return the holder class.
747 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
748 }
749 break;
750 }
751 }
752 return NULL;
753 JVM_END
754
755
756 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
757 oop mirror = NULL;
758 BasicType t = name2type(utf);
759 if (t != T_ILLEGAL && !is_reference_type(t)) {
760 mirror = Universe::java_mirror(t);
761 }
762 if (mirror == NULL) {
763 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
764 } else {
765 return (jclass) JNIHandles::make_local(THREAD, mirror);
766 }
767 JVM_END
768
769
770 // Returns a class loaded by the bootstrap class loader; or null
771 // if not found. ClassNotFoundException is not thrown.
772 // FindClassFromBootLoader is exported to the launcher for windows.
773 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
774 const char* name))
775 // Java libraries should ensure that name is never null or illegal.
776 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
777 // It's impossible to create this class; the name cannot fit
778 // into the constant pool.
779 return NULL;
780 }
781 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
782
783 TempNewSymbol h_name = SymbolTable::new_symbol(name);
784 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
785 if (k == NULL) {
786 return NULL;
787 }
788
789 if (log_is_enabled(Debug, class, resolve)) {
790 trace_class_resolution(k);
791 }
792 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
793 JVM_END
794
795 // Find a class with this name in this loader, using the caller's protection domain.
796 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
797 jboolean init, jobject loader,
798 jclass caller))
799 TempNewSymbol h_name =
800 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
801 CHECK_NULL);
802
803 oop loader_oop = JNIHandles::resolve(loader);
804 oop from_class = JNIHandles::resolve(caller);
805 oop protection_domain = NULL;
806 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
807 // NPE. Put it in another way, the bootstrap class loader has all permission and
808 // thus no checkPackageAccess equivalence in the VM class loader.
809 // The caller is also passed as NULL by the java code if there is no security
810 // manager to avoid the performance cost of getting the calling class.
811 if (from_class != NULL && loader_oop != NULL) {
812 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
813 }
814
815 Handle h_loader(THREAD, loader_oop);
816 Handle h_prot(THREAD, protection_domain);
817 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
818 h_prot, false, THREAD);
819
820 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
821 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
822 }
823 return result;
824 JVM_END
825
826 // Currently only called from the old verifier.
827 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
828 jboolean init, jclass from))
829 TempNewSymbol h_name =
830 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
831 CHECK_NULL);
832 oop from_class_oop = JNIHandles::resolve(from);
833 Klass* from_class = (from_class_oop == NULL)
834 ? (Klass*)NULL
835 : java_lang_Class::as_Klass(from_class_oop);
836 oop class_loader = NULL;
837 oop protection_domain = NULL;
838 if (from_class != NULL) {
839 class_loader = from_class->class_loader();
840 protection_domain = from_class->protection_domain();
841 }
842 Handle h_loader(THREAD, class_loader);
843 Handle h_prot (THREAD, protection_domain);
844 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
845 h_prot, true, thread);
846
847 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
848 // this function is generally only used for class loading during verification.
849 ResourceMark rm;
850 oop from_mirror = JNIHandles::resolve_non_null(from);
851 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
852 const char * from_name = from_class->external_name();
853
854 oop mirror = JNIHandles::resolve_non_null(result);
855 Klass* to_class = java_lang_Class::as_Klass(mirror);
856 const char * to = to_class->external_name();
857 log_debug(class, resolve)("%s %s (verification)", from_name, to);
858 }
859
860 return result;
861 JVM_END
862
863 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
864 static jclass jvm_define_class_common(const char *name,
865 jobject loader, const jbyte *buf,
866 jsize len, jobject pd, const char *source,
867 TRAPS) {
868 if (source == NULL) source = "__JVM_DefineClass__";
869
870 JavaThread* jt = THREAD;
871
872 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
873 ClassLoader::perf_define_appclass_selftime(),
874 ClassLoader::perf_define_appclasses(),
875 jt->get_thread_stat()->perf_recursion_counts_addr(),
876 jt->get_thread_stat()->perf_timers_addr(),
877 PerfClassTraceTime::DEFINE_CLASS);
878
879 if (UsePerfData) {
880 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
881 }
882
883 // Class resolution will get the class name from the .class stream if the name is null.
884 TempNewSymbol class_name = name == NULL ? NULL :
885 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
886 CHECK_NULL);
887
888 ResourceMark rm(THREAD);
889 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
890 Handle class_loader (THREAD, JNIHandles::resolve(loader));
891 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
892 ClassLoadInfo cl_info(protection_domain);
893 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
894 class_loader,
895 cl_info,
896 CHECK_NULL);
897
898 if (log_is_enabled(Debug, class, resolve)) {
899 trace_class_resolution(k);
900 }
901
902 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
903 }
904
905 enum {
906 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
907 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
908 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
909 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
910 };
911
912 /*
913 * Define a class with the specified flags that indicates if it's a nestmate,
914 * hidden, or strongly referenced from class loader.
915 */
916 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
917 const jbyte *buf, jsize len, jobject pd,
918 jboolean init, int flags, jobject classData, TRAPS) {
919 ResourceMark rm(THREAD);
920
921 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup));
922 // Lookup class must be a non-null instance
923 if (lookup_k == NULL) {
924 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
925 }
926 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass");
927
928 Handle class_loader (THREAD, lookup_k->class_loader());
929
930 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
931 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
932 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
933 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
934
935 InstanceKlass* host_class = NULL;
936 if (is_nestmate) {
937 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL);
938 }
939
940 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
941 name,
942 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
943 is_nestmate ? host_class->external_name() : "",
944 is_hidden ? "hidden" : "not hidden",
945 is_strong ? "strong" : "weak",
946 vm_annotations ? "with vm annotations" : "without vm annotation");
947
948 if (!is_hidden) {
949 // classData is only applicable for hidden classes
950 if (classData != NULL) {
951 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
952 }
953 if (is_nestmate) {
954 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
955 }
956 if (!is_strong) {
957 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
958 }
959 if (vm_annotations) {
960 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
961 }
962 if (flags != STRONG_LOADER_LINK) {
963 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
964 err_msg("invalid flag 0x%x", flags));
965 }
966 }
967
968 // Class resolution will get the class name from the .class stream if the name is null.
969 TempNewSymbol class_name = name == NULL ? NULL :
970 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
971 CHECK_NULL);
972
973 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
974 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
975 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
976
977 InstanceKlass* ik = NULL;
978 if (!is_hidden) {
979 ClassLoadInfo cl_info(protection_domain);
980 ik = SystemDictionary::resolve_from_stream(&st, class_name,
981 class_loader,
982 cl_info,
983 CHECK_NULL);
984
985 if (log_is_enabled(Debug, class, resolve)) {
986 trace_class_resolution(ik);
987 }
988 } else { // hidden
989 Handle classData_h(THREAD, JNIHandles::resolve(classData));
990 ClassLoadInfo cl_info(protection_domain,
991 host_class,
992 classData_h,
993 is_hidden,
994 is_strong,
995 vm_annotations);
996 ik = SystemDictionary::resolve_from_stream(&st, class_name,
997 class_loader,
998 cl_info,
999 CHECK_NULL);
1000
1001 // The hidden class loader data has been artificially been kept alive to
1002 // this point. The mirror and any instances of this class have to keep
1003 // it alive afterwards.
1004 ik->class_loader_data()->dec_keep_alive();
1005
1006 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1007 ModuleEntry* module = ik->module();
1008 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1009 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1010 module_name,
1011 ik->external_name(),
1012 host_class->external_name(),
1013 ik->is_hidden() ? "is hidden" : "is not hidden");
1014 }
1015 }
1016 assert(Reflection::is_same_class_package(lookup_k, ik),
1017 "lookup class and defined class are in different packages");
1018
1019 if (init) {
1020 ik->initialize(CHECK_NULL);
1021 } else {
1022 ik->link_class(CHECK_NULL);
1023 }
1024
1025 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1026 }
1027
1028 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1029 return jvm_define_class_common(name, loader, buf, len, pd, NULL, THREAD);
1030 JVM_END
1031
1032 /*
1033 * Define a class with the specified lookup class.
1034 * lookup: Lookup class
1035 * name: the name of the class
1036 * buf: class bytes
1037 * len: length of class bytes
1038 * pd: protection domain
1039 * init: initialize the class
1040 * flags: properties of the class
1041 * classData: private static pre-initialized field
1042 */
1043 JVM_ENTRY(jclass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1044 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1045
1046 if (lookup == NULL) {
1047 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1048 }
1049
1050 assert(buf != NULL, "buf must not be NULL");
1051
1052 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1053 JVM_END
1054
1055 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1056
1057 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1058 JVM_END
1059
1060 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1061 ResourceMark rm(THREAD);
1062
1063 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1064 char* str = java_lang_String::as_utf8_string(h_name());
1065
1066 // Sanity check, don't expect null
1067 if (str == NULL) return NULL;
1068
1069 // Internalize the string, converting '.' to '/' in string.
1070 char* p = (char*)str;
1071 while (*p != '\0') {
1072 if (*p == '.') {
1073 *p = '/';
1074 }
1075 p++;
1076 }
1077
1078 const int str_len = (int)(p - str);
1079 if (str_len > Symbol::max_length()) {
1080 // It's impossible to create this class; the name cannot fit
1081 // into the constant pool.
1082 return NULL;
1083 }
1084 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1085
1086 // Security Note:
1087 // The Java level wrapper will perform the necessary security check allowing
1088 // us to pass the NULL as the initiating class loader.
1089 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1090 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1091 h_loader,
1092 Handle());
1093 #if INCLUDE_CDS
1094 if (k == NULL) {
1095 // If the class is not already loaded, try to see if it's in the shared
1096 // archive for the current classloader (h_loader).
1097 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1098 }
1099 #endif
1100 return (k == NULL) ? NULL :
1101 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1102 JVM_END
1103
1104 // Module support //////////////////////////////////////////////////////////////////////////////
1105
1106 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1107 jstring location, jobjectArray packages))
1108 Handle h_module (THREAD, JNIHandles::resolve(module));
1109 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1110 JVM_END
1111
1112 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1113 Handle h_module (THREAD, JNIHandles::resolve(module));
1114 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1115 JVM_END
1116
1117 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1118 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1119 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1120 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1121 JVM_END
1122
1123 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1124 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1125 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1126 JVM_END
1127
1128 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1129 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1130 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1131 JVM_END
1132
1133 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1134 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1135 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1136 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1137 JVM_END
1138
1139 JVM_ENTRY(void, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1140 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1141 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1142 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1143 JVM_END
1144
1145 // Reflection support //////////////////////////////////////////////////////////////////////////////
1146
1147 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1148 assert (cls != NULL, "illegal class");
1149 JvmtiVMObjectAllocEventCollector oam;
1150 ResourceMark rm(THREAD);
1151 HandleMark hm(THREAD);
1152 Handle java_class(THREAD, JNIHandles::resolve(cls));
1153 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1154 return (jstring) JNIHandles::make_local(THREAD, result);
1155 JVM_END
1156
1157
1158 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1159 JvmtiVMObjectAllocEventCollector oam;
1160 oop mirror = JNIHandles::resolve_non_null(cls);
1161
1162 // Special handling for primitive objects
1163 if (java_lang_Class::is_primitive(mirror)) {
1164 // Primitive objects does not have any interfaces
1165 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1166 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1167 }
1168
1169 Klass* klass = java_lang_Class::as_Klass(mirror);
1170 // Figure size of result array
1171 int size;
1172 if (klass->is_instance_klass()) {
1173 InstanceKlass* ik = InstanceKlass::cast(klass);
1174 size = ik->local_interfaces()->length();
1175 } else {
1176 assert(klass->is_objArray_klass() || klass->is_typeArray_klass() || klass->is_flatArray_klass(), "Illegal mirror klass");
1177 size = 3;
1178 }
1179
1180 // Allocate result array
1181 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1182 objArrayHandle result (THREAD, r);
1183 // Fill in result
1184 if (klass->is_instance_klass()) {
1185 // Regular instance klass, fill in all local interfaces
1186 for (int index = 0; index < size; index++) {
1187 InstanceKlass* ik = InstanceKlass::cast(klass);
1188 Klass* k = ik->local_interfaces()->at(index);
1189 result->obj_at_put(index, k->java_mirror());
1190 }
1191 } else {
1192 // All arrays implement java.lang.Cloneable, java.io.Serializable and java.lang.IdentityObject
1193 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1194 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1195 result->obj_at_put(2, vmClasses::IdentityObject_klass()->java_mirror());
1196 }
1197 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1198 JVM_END
1199
1200
1201 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1202 oop mirror = JNIHandles::resolve_non_null(cls);
1203 if (java_lang_Class::is_primitive(mirror)) {
1204 return JNI_FALSE;
1205 }
1206 Klass* k = java_lang_Class::as_Klass(mirror);
1207 jboolean result = k->is_interface();
1208 assert(!result || k->is_instance_klass(),
1209 "all interfaces are instance types");
1210 // The compiler intrinsic for isInterface tests the
1211 // Klass::_access_flags bits in the same way.
1212 return result;
1213 JVM_END
1214
1215 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1216 oop mirror = JNIHandles::resolve_non_null(cls);
1217 if (java_lang_Class::is_primitive(mirror)) {
1218 return JNI_FALSE;
1219 }
1220 Klass* k = java_lang_Class::as_Klass(mirror);
1221 return k->is_hidden();
1222 JVM_END
1223
1224 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1225 JvmtiVMObjectAllocEventCollector oam;
1226 oop mirror = JNIHandles::resolve_non_null(cls);
1227 if (java_lang_Class::is_primitive(mirror)) {
1228 // There are no signers for primitive types
1229 return NULL;
1230 }
1231
1232 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1233
1234 // If there are no signers set in the class, or if the class
1235 // is an array, return NULL.
1236 if (signers == NULL) return NULL;
1237
1238 // copy of the signers array
1239 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1240 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1241 for (int index = 0; index < signers->length(); index++) {
1242 signers_copy->obj_at_put(index, signers->obj_at(index));
1243 }
1244
1245 // return the copy
1246 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1247 JVM_END
1248
1249
1250 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1251 oop mirror = JNIHandles::resolve_non_null(cls);
1252 if (!java_lang_Class::is_primitive(mirror)) {
1253 // This call is ignored for primitive types and arrays.
1254 // Signers are only set once, ClassLoader.java, and thus shouldn't
1255 // be called with an array. Only the bootstrap loader creates arrays.
1256 Klass* k = java_lang_Class::as_Klass(mirror);
1257 if (k->is_instance_klass()) {
1258 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1259 }
1260 }
1261 JVM_END
1262
1263
1264 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1265 oop mirror = JNIHandles::resolve_non_null(cls);
1266 if (mirror == NULL) {
1267 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1268 }
1269
1270 if (java_lang_Class::is_primitive(mirror)) {
1271 // Primitive types does not have a protection domain.
1272 return NULL;
1273 }
1274
1275 oop pd = java_lang_Class::protection_domain(mirror);
1276 return (jobject) JNIHandles::make_local(THREAD, pd);
1277 JVM_END
1278
1279
1280 // Returns the inherited_access_control_context field of the running thread.
1281 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1282 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1283 return JNIHandles::make_local(THREAD, result);
1284 JVM_END
1285
1286 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1287 if (!UsePrivilegedStack) return NULL;
1288
1289 ResourceMark rm(THREAD);
1290 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1291 JvmtiVMObjectAllocEventCollector oam;
1292
1293 // count the protection domains on the execution stack. We collapse
1294 // duplicate consecutive protection domains into a single one, as
1295 // well as stopping when we hit a privileged frame.
1296
1297 oop previous_protection_domain = NULL;
1298 Handle privileged_context(thread, NULL);
1299 bool is_privileged = false;
1300 oop protection_domain = NULL;
1301
1302 // Iterate through Java frames
1303 vframeStream vfst(thread);
1304 for(; !vfst.at_end(); vfst.next()) {
1305 // get method of frame
1306 Method* method = vfst.method();
1307
1308 // stop at the first privileged frame
1309 if (method->method_holder() == vmClasses::AccessController_klass() &&
1310 method->name() == vmSymbols::executePrivileged_name())
1311 {
1312 // this frame is privileged
1313 is_privileged = true;
1314
1315 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1316
1317 StackValueCollection* locals = priv->locals();
1318 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1319 StackValue* clr_sv = locals->at(2); // Class<?> caller
1320 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1321 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1322 privileged_context = ctx_sv->get_obj();
1323 Handle caller = clr_sv->get_obj();
1324
1325 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1326 protection_domain = caller_klass->protection_domain();
1327 } else {
1328 protection_domain = method->method_holder()->protection_domain();
1329 }
1330
1331 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1332 local_array->push(Handle(thread, protection_domain));
1333 previous_protection_domain = protection_domain;
1334 }
1335
1336 if (is_privileged) break;
1337 }
1338
1339
1340 // either all the domains on the stack were system domains, or
1341 // we had a privileged system domain
1342 if (local_array->is_empty()) {
1343 if (is_privileged && privileged_context.is_null()) return NULL;
1344
1345 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1346 return JNIHandles::make_local(THREAD, result);
1347 }
1348
1349 objArrayOop context = oopFactory::new_objArray(vmClasses::ProtectionDomain_klass(),
1350 local_array->length(), CHECK_NULL);
1351 objArrayHandle h_context(thread, context);
1352 for (int index = 0; index < local_array->length(); index++) {
1353 h_context->obj_at_put(index, local_array->at(index)());
1354 }
1355
1356 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1357
1358 return JNIHandles::make_local(THREAD, result);
1359 JVM_END
1360
1361
1362 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1363 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1364 return (k != NULL) && k->is_array_klass() ? true : false;
1365 JVM_END
1366
1367
1368 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1369 oop mirror = JNIHandles::resolve_non_null(cls);
1370 return (jboolean) java_lang_Class::is_primitive(mirror);
1371 JVM_END
1372
1373
1374 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1375 oop mirror = JNIHandles::resolve_non_null(cls);
1376 if (java_lang_Class::is_primitive(mirror)) {
1377 // Primitive type
1378 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1379 }
1380
1381 Klass* k = java_lang_Class::as_Klass(mirror);
1382 debug_only(int computed_modifiers = k->compute_modifier_flags());
1383 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1384 return k->modifier_flags();
1385 JVM_END
1386
1387
1388 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1389
1390 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1391 JvmtiVMObjectAllocEventCollector oam;
1392 // ofClass is a reference to a java_lang_Class object. The mirror object
1393 // of an InstanceKlass
1394 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1395 if (java_lang_Class::is_primitive(ofMirror) ||
1396 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1397 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1398 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1399 }
1400
1401 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1402 InnerClassesIterator iter(k);
1403
1404 if (iter.length() == 0) {
1405 // Neither an inner nor outer class
1406 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1407 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1408 }
1409
1410 // find inner class info
1411 constantPoolHandle cp(thread, k->constants());
1412 int length = iter.length();
1413
1414 // Allocate temp. result array
1415 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1416 objArrayHandle result (THREAD, r);
1417 int members = 0;
1418
1419 for (; !iter.done(); iter.next()) {
1420 int ioff = iter.inner_class_info_index();
1421 int ooff = iter.outer_class_info_index();
1422
1423 if (ioff != 0 && ooff != 0) {
1424 // Check to see if the name matches the class we're looking for
1425 // before attempting to find the class.
1426 if (cp->klass_name_at_matches(k, ooff)) {
1427 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1428 if (outer_klass == k) {
1429 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1430 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1431
1432 // Throws an exception if outer klass has not declared k as
1433 // an inner klass
1434 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1435
1436 result->obj_at_put(members, inner_klass->java_mirror());
1437 members++;
1438 }
1439 }
1440 }
1441 }
1442
1443 if (members != length) {
1444 // Return array of right length
1445 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1446 for(int i = 0; i < members; i++) {
1447 res->obj_at_put(i, result->obj_at(i));
1448 }
1449 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1450 }
1451
1452 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1453 JVM_END
1454
1455
1456 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1457 {
1458 // ofClass is a reference to a java_lang_Class object.
1459 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1460 if (java_lang_Class::is_primitive(ofMirror)) {
1461 return NULL;
1462 }
1463 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1464 if (!klass->is_instance_klass()) {
1465 return NULL;
1466 }
1467
1468 bool inner_is_member = false;
1469 Klass* outer_klass
1470 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1471 if (outer_klass == NULL) return NULL; // already a top-level class
1472 if (!inner_is_member) return NULL; // a hidden class (inside a method)
1473 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1474 }
1475 JVM_END
1476
1477 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1478 {
1479 oop mirror = JNIHandles::resolve_non_null(cls);
1480 if (java_lang_Class::is_primitive(mirror)) {
1481 return NULL;
1482 }
1483 Klass* klass = java_lang_Class::as_Klass(mirror);
1484 if (!klass->is_instance_klass()) {
1485 return NULL;
1486 }
1487 InstanceKlass* k = InstanceKlass::cast(klass);
1488 int ooff = 0, noff = 0;
1489 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1490 if (noff != 0) {
1491 constantPoolHandle i_cp(thread, k->constants());
1492 Symbol* name = i_cp->symbol_at(noff);
1493 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1494 return (jstring) JNIHandles::make_local(THREAD, str());
1495 }
1496 }
1497 return NULL;
1498 }
1499 JVM_END
1500
1501 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1502 assert (cls != NULL, "illegal class");
1503 JvmtiVMObjectAllocEventCollector oam;
1504 ResourceMark rm(THREAD);
1505 oop mirror = JNIHandles::resolve_non_null(cls);
1506 // Return null for arrays and primatives
1507 if (!java_lang_Class::is_primitive(mirror)) {
1508 Klass* k = java_lang_Class::as_Klass(mirror);
1509 if (k->is_instance_klass()) {
1510 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1511 if (sym == NULL) return NULL;
1512 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1513 return (jstring) JNIHandles::make_local(THREAD, str());
1514 }
1515 }
1516 return NULL;
1517 JVM_END
1518
1519
1520 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1521 assert (cls != NULL, "illegal class");
1522 oop mirror = JNIHandles::resolve_non_null(cls);
1523 // Return null for arrays and primitives
1524 if (!java_lang_Class::is_primitive(mirror)) {
1525 Klass* k = java_lang_Class::as_Klass(mirror);
1526 if (k->is_instance_klass()) {
1527 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1528 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1529 }
1530 }
1531 return NULL;
1532 JVM_END
1533
1534
1535 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1536 // some of this code was adapted from from jni_FromReflectedField
1537
1538 oop reflected = JNIHandles::resolve_non_null(field);
1539 oop mirror = java_lang_reflect_Field::clazz(reflected);
1540 Klass* k = java_lang_Class::as_Klass(mirror);
1541 int slot = java_lang_reflect_Field::slot(reflected);
1542 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1543
1544 InstanceKlass* ik = InstanceKlass::cast(k);
1545 intptr_t offset = ik->field_offset(slot);
1546
1547 if (modifiers & JVM_ACC_STATIC) {
1548 // for static fields we only look in the current class
1549 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1550 assert(false, "cannot find static field");
1551 return false;
1552 }
1553 } else {
1554 // for instance fields we start with the current class and work
1555 // our way up through the superclass chain
1556 if (!ik->find_field_from_offset(offset, false, &fd)) {
1557 assert(false, "cannot find instance field");
1558 return false;
1559 }
1560 }
1561 return true;
1562 }
1563
1564 static Method* jvm_get_method_common(jobject method) {
1565 // some of this code was adapted from from jni_FromReflectedMethod
1566
1567 oop reflected = JNIHandles::resolve_non_null(method);
1568 oop mirror = NULL;
1569 int slot = 0;
1570
1571 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1572 mirror = java_lang_reflect_Constructor::clazz(reflected);
1573 slot = java_lang_reflect_Constructor::slot(reflected);
1574 } else {
1575 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1576 "wrong type");
1577 mirror = java_lang_reflect_Method::clazz(reflected);
1578 slot = java_lang_reflect_Method::slot(reflected);
1579 }
1580 Klass* k = java_lang_Class::as_Klass(mirror);
1581
1582 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1583 assert(m != NULL, "cannot find method");
1584 return m; // caller has to deal with NULL in product mode
1585 }
1586
1587 /* Type use annotations support (JDK 1.8) */
1588
1589 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1590 assert (cls != NULL, "illegal class");
1591 ResourceMark rm(THREAD);
1592 // Return null for arrays and primitives
1593 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1594 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1595 if (k->is_instance_klass()) {
1596 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1597 if (type_annotations != NULL) {
1598 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1599 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1600 }
1601 }
1602 }
1603 return NULL;
1604 JVM_END
1605
1606 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1607 assert (method != NULL, "illegal method");
1608 // method is a handle to a java.lang.reflect.Method object
1609 Method* m = jvm_get_method_common(method);
1610 if (m == NULL) {
1611 return NULL;
1612 }
1613
1614 AnnotationArray* type_annotations = m->type_annotations();
1615 if (type_annotations != NULL) {
1616 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1617 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1618 }
1619
1620 return NULL;
1621 JVM_END
1622
1623 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1624 assert (field != NULL, "illegal field");
1625 fieldDescriptor fd;
1626 bool gotFd = jvm_get_field_common(field, fd);
1627 if (!gotFd) {
1628 return NULL;
1629 }
1630
1631 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1632 JVM_END
1633
1634 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1635 if (!cp->is_within_bounds(index)) {
1636 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1637 }
1638 }
1639
1640 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1641 {
1642 // method is a handle to a java.lang.reflect.Method object
1643 Method* method_ptr = jvm_get_method_common(method);
1644 methodHandle mh (THREAD, method_ptr);
1645 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1646 const int num_params = mh->method_parameters_length();
1647
1648 if (num_params < 0) {
1649 // A -1 return value from method_parameters_length means there is no
1650 // parameter data. Return null to indicate this to the reflection
1651 // API.
1652 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1653 return (jobjectArray)NULL;
1654 } else {
1655 // Otherwise, we return something up to reflection, even if it is
1656 // a zero-length array. Why? Because in some cases this can
1657 // trigger a MalformedParametersException.
1658
1659 // make sure all the symbols are properly formatted
1660 for (int i = 0; i < num_params; i++) {
1661 MethodParametersElement* params = mh->method_parameters_start();
1662 int index = params[i].name_cp_index;
1663 constantPoolHandle cp(THREAD, mh->constants());
1664 bounds_check(cp, index, CHECK_NULL);
1665
1666 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1667 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1668 "Wrong type at constant pool index");
1669 }
1670
1671 }
1672
1673 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1674 objArrayHandle result (THREAD, result_oop);
1675
1676 for (int i = 0; i < num_params; i++) {
1677 MethodParametersElement* params = mh->method_parameters_start();
1678 // For a 0 index, give a NULL symbol
1679 Symbol* sym = 0 != params[i].name_cp_index ?
1680 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1681 int flags = params[i].flags;
1682 oop param = Reflection::new_parameter(reflected_method, i, sym,
1683 flags, CHECK_NULL);
1684 result->obj_at_put(i, param);
1685 }
1686 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1687 }
1688 }
1689 JVM_END
1690
1691 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1692
1693 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1694 {
1695 JvmtiVMObjectAllocEventCollector oam;
1696
1697 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1698 // Exclude primitive types and array types
1699 if (java_lang_Class::is_primitive(ofMirror) ||
1700 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1701 // Return empty array
1702 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1703 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1704 }
1705
1706 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1707 constantPoolHandle cp(THREAD, k->constants());
1708
1709 // Ensure class is linked
1710 k->link_class(CHECK_NULL);
1711
1712 // Allocate result
1713 int num_fields;
1714
1715 if (publicOnly) {
1716 num_fields = 0;
1717 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1718 if (fs.access_flags().is_public()) ++num_fields;
1719 }
1720 } else {
1721 num_fields = k->java_fields_count();
1722 }
1723
1724 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1725 objArrayHandle result (THREAD, r);
1726
1727 int out_idx = 0;
1728 fieldDescriptor fd;
1729 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1730 if (!publicOnly || fs.access_flags().is_public()) {
1731 fd.reinitialize(k, fs.index());
1732 oop field = Reflection::new_field(&fd, CHECK_NULL);
1733 result->obj_at_put(out_idx, field);
1734 ++out_idx;
1735 }
1736 }
1737 assert(out_idx == num_fields, "just checking");
1738 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1739 }
1740 JVM_END
1741
1742 // A class is a record if and only if it is final and a direct subclass of
1743 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1744 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1745 {
1746 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1747 if (k != NULL && k->is_instance_klass()) {
1748 InstanceKlass* ik = InstanceKlass::cast(k);
1749 return ik->is_record();
1750 } else {
1751 return false;
1752 }
1753 }
1754 JVM_END
1755
1756 // Returns an array containing the components of the Record attribute,
1757 // or NULL if the attribute is not present.
1758 //
1759 // Note that this function returns the components of the Record attribute
1760 // even if the class is not a record.
1761 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1762 {
1763 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1764 assert(c->is_instance_klass(), "must be");
1765 InstanceKlass* ik = InstanceKlass::cast(c);
1766
1767 Array<RecordComponent*>* components = ik->record_components();
1768 if (components != NULL) {
1769 JvmtiVMObjectAllocEventCollector oam;
1770 constantPoolHandle cp(THREAD, ik->constants());
1771 int length = components->length();
1772 assert(length >= 0, "unexpected record_components length");
1773 objArrayOop record_components =
1774 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1775 objArrayHandle components_h (THREAD, record_components);
1776
1777 for (int x = 0; x < length; x++) {
1778 RecordComponent* component = components->at(x);
1779 assert(component != NULL, "unexpected NULL record component");
1780 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1781 components_h->obj_at_put(x, component_oop);
1782 }
1783 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1784 }
1785
1786 return NULL;
1787 }
1788 JVM_END
1789
1790 static bool select_method(const methodHandle& method, bool want_constructor) {
1791 bool is_ctor = (method->is_object_constructor() ||
1792 method->is_static_init_factory());
1793 if (want_constructor) {
1794 return is_ctor;
1795 } else {
1796 return (!is_ctor &&
1797 !method->is_class_initializer() &&
1798 !method->is_overpass());
1799 }
1800 }
1801
1802 static jobjectArray get_class_declared_methods_helper(
1803 JNIEnv *env,
1804 jclass ofClass, jboolean publicOnly,
1805 bool want_constructor,
1806 Klass* klass, TRAPS) {
1807
1808 JvmtiVMObjectAllocEventCollector oam;
1809
1810 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1811 // Exclude primitive types and array types
1812 if (java_lang_Class::is_primitive(ofMirror)
1813 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1814 // Return empty array
1815 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1816 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1817 }
1818
1819 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1820
1821 // Ensure class is linked
1822 k->link_class(CHECK_NULL);
1823
1824 Array<Method*>* methods = k->methods();
1825 int methods_length = methods->length();
1826
1827 // Save original method_idnum in case of redefinition, which can change
1828 // the idnum of obsolete methods. The new method will have the same idnum
1829 // but if we refresh the methods array, the counts will be wrong.
1830 ResourceMark rm(THREAD);
1831 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1832 int num_methods = 0;
1833
1834 for (int i = 0; i < methods_length; i++) {
1835 methodHandle method(THREAD, methods->at(i));
1836 if (select_method(method, want_constructor)) {
1837 if (!publicOnly || method->is_public()) {
1838 idnums->push(method->method_idnum());
1839 ++num_methods;
1840 }
1841 }
1842 }
1843
1844 // Allocate result
1845 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1846 objArrayHandle result (THREAD, r);
1847
1848 // Now just put the methods that we selected above, but go by their idnum
1849 // in case of redefinition. The methods can be redefined at any safepoint,
1850 // so above when allocating the oop array and below when creating reflect
1851 // objects.
1852 for (int i = 0; i < num_methods; i++) {
1853 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1854 if (method.is_null()) {
1855 // Method may have been deleted and seems this API can handle null
1856 // Otherwise should probably put a method that throws NSME
1857 result->obj_at_put(i, NULL);
1858 } else {
1859 oop m;
1860 if (want_constructor) {
1861 assert(method->is_object_constructor() ||
1862 method->is_static_init_factory(), "must be");
1863 m = Reflection::new_constructor(method, CHECK_NULL);
1864 } else {
1865 m = Reflection::new_method(method, false, CHECK_NULL);
1866 }
1867 result->obj_at_put(i, m);
1868 }
1869 }
1870
1871 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1872 }
1873
1874 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1875 {
1876 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1877 /*want_constructor*/ false,
1878 vmClasses::reflect_Method_klass(), THREAD);
1879 }
1880 JVM_END
1881
1882 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1883 {
1884 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1885 /*want_constructor*/ true,
1886 vmClasses::reflect_Constructor_klass(), THREAD);
1887 }
1888 JVM_END
1889
1890 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1891 {
1892 oop mirror = JNIHandles::resolve_non_null(cls);
1893 if (java_lang_Class::is_primitive(mirror)) {
1894 // Primitive type
1895 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1896 }
1897
1898 Klass* k = java_lang_Class::as_Klass(mirror);
1899 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1900 }
1901 JVM_END
1902
1903 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1904 {
1905 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1906 assert(c->is_instance_klass(), "must be");
1907 InstanceKlass* ck = InstanceKlass::cast(c);
1908 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1909 assert(m->is_instance_klass(), "must be");
1910 InstanceKlass* mk = InstanceKlass::cast(m);
1911 return ck->has_nestmate_access_to(mk, THREAD);
1912 }
1913 JVM_END
1914
1915 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1916 {
1917 // current is not a primitive or array class
1918 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1919 assert(c->is_instance_klass(), "must be");
1920 InstanceKlass* ck = InstanceKlass::cast(c);
1921 InstanceKlass* host = ck->nest_host(THREAD);
1922 return (jclass) (host == NULL ? NULL :
1923 JNIHandles::make_local(THREAD, host->java_mirror()));
1924 }
1925 JVM_END
1926
1927 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1928 {
1929 // current is not a primitive or array class
1930 ResourceMark rm(THREAD);
1931 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1932 assert(c->is_instance_klass(), "must be");
1933 InstanceKlass* ck = InstanceKlass::cast(c);
1934 InstanceKlass* host = ck->nest_host(THREAD);
1935
1936 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1937 ck->external_name(), host->external_name());
1938 {
1939 JvmtiVMObjectAllocEventCollector oam;
1940 Array<u2>* members = host->nest_members();
1941 int length = members == NULL ? 0 : members->length();
1942
1943 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1944
1945 // nest host is first in the array so make it one bigger
1946 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1947 length + 1, CHECK_NULL);
1948 objArrayHandle result(THREAD, r);
1949 result->obj_at_put(0, host->java_mirror());
1950 if (length != 0) {
1951 int count = 0;
1952 for (int i = 0; i < length; i++) {
1953 int cp_index = members->at(i);
1954 Klass* k = host->constants()->klass_at(cp_index, THREAD);
1955 if (HAS_PENDING_EXCEPTION) {
1956 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1957 return NULL; // propagate VMEs
1958 }
1959 if (log_is_enabled(Trace, class, nestmates)) {
1960 stringStream ss;
1961 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1962 ss.print(" - resolution of nest member %s failed: ", target_member_class);
1963 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1964 log_trace(class, nestmates)("%s", ss.as_string());
1965 }
1966 CLEAR_PENDING_EXCEPTION;
1967 continue;
1968 }
1969 if (k->is_instance_klass()) {
1970 InstanceKlass* ik = InstanceKlass::cast(k);
1971 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1972 if (nest_host_k == host) {
1973 result->obj_at_put(count+1, k->java_mirror());
1974 count++;
1975 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1976 } else {
1977 log_trace(class, nestmates)(" - skipping member %s with different host %s",
1978 ik->external_name(), nest_host_k->external_name());
1979 }
1980 } else {
1981 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1982 k->external_name());
1983 }
1984 }
1985 if (count < length) {
1986 // we had invalid entries so we need to compact the array
1987 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1988 length + 1, count + 1);
1989
1990 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1991 count + 1, CHECK_NULL);
1992 objArrayHandle result2(THREAD, r2);
1993 for (int i = 0; i < count + 1; i++) {
1994 result2->obj_at_put(i, result->obj_at(i));
1995 }
1996 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1997 }
1998 }
1999 else {
2000 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
2001 }
2002 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2003 }
2004 }
2005 JVM_END
2006
2007 JVM_ENTRY(jobjectArray, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
2008 {
2009 oop mirror = JNIHandles::resolve_non_null(current);
2010 assert(!java_lang_Class::is_primitive(mirror), "should not be");
2011 Klass* c = java_lang_Class::as_Klass(mirror);
2012 assert(c->is_instance_klass(), "must be");
2013 InstanceKlass* ik = InstanceKlass::cast(c);
2014 ResourceMark rm(THREAD);
2015 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2016 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2017 if (ik->is_sealed()) {
2018 JvmtiVMObjectAllocEventCollector oam;
2019 Array<u2>* subclasses = ik->permitted_subclasses();
2020 int length = subclasses->length();
2021
2022 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2023
2024 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2025 length, CHECK_NULL);
2026 objArrayHandle result(THREAD, r);
2027 int count = 0;
2028 for (int i = 0; i < length; i++) {
2029 int cp_index = subclasses->at(i);
2030 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
2031 if (HAS_PENDING_EXCEPTION) {
2032 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
2033 return NULL; // propagate VMEs
2034 }
2035 if (log_is_enabled(Trace, class, sealed)) {
2036 stringStream ss;
2037 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
2038 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
2039 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
2040 log_trace(class, sealed)("%s", ss.as_string());
2041 }
2042
2043 CLEAR_PENDING_EXCEPTION;
2044 continue;
2045 }
2046 if (k->is_instance_klass()) {
2047 result->obj_at_put(count++, k->java_mirror());
2048 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
2049 }
2050 }
2051 if (count < length) {
2052 // we had invalid entries so we need to compact the array
2053 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2054 count, CHECK_NULL);
2055 objArrayHandle result2(THREAD, r2);
2056 for (int i = 0; i < count; i++) {
2057 result2->obj_at_put(i, result->obj_at(i));
2058 }
2059 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2060 }
2061 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2062 } else {
2063 return NULL;
2064 }
2065 }
2066 JVM_END
2067
2068 // Constant pool access //////////////////////////////////////////////////////////
2069
2070 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2071 {
2072 JvmtiVMObjectAllocEventCollector oam;
2073 oop mirror = JNIHandles::resolve_non_null(cls);
2074 // Return null for primitives and arrays
2075 if (!java_lang_Class::is_primitive(mirror)) {
2076 Klass* k = java_lang_Class::as_Klass(mirror);
2077 if (k->is_instance_klass()) {
2078 InstanceKlass* k_h = InstanceKlass::cast(k);
2079 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2080 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2081 return JNIHandles::make_local(THREAD, jcp());
2082 }
2083 }
2084 return NULL;
2085 }
2086 JVM_END
2087
2088
2089 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2090 {
2091 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 return cp->length();
2093 }
2094 JVM_END
2095
2096
2097 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2098 {
2099 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2100 bounds_check(cp, index, CHECK_NULL);
2101 constantTag tag = cp->tag_at(index);
2102 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2103 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2104 }
2105 Klass* k = cp->klass_at(index, CHECK_NULL);
2106 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2107 }
2108 JVM_END
2109
2110 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2111 {
2112 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2113 bounds_check(cp, index, CHECK_NULL);
2114 constantTag tag = cp->tag_at(index);
2115 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2116 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2117 }
2118 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2119 if (k == NULL) return NULL;
2120 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2121 }
2122 JVM_END
2123
2124 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2125 constantTag tag = cp->tag_at(index);
2126 if (!tag.is_method() && !tag.is_interface_method()) {
2127 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2128 }
2129 int klass_ref = cp->uncached_klass_ref_index_at(index);
2130 Klass* k_o;
2131 if (force_resolution) {
2132 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2133 } else {
2134 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2135 if (k_o == NULL) return NULL;
2136 }
2137 InstanceKlass* k = InstanceKlass::cast(k_o);
2138 Symbol* name = cp->uncached_name_ref_at(index);
2139 Symbol* sig = cp->uncached_signature_ref_at(index);
2140 methodHandle m (THREAD, k->find_method(name, sig));
2141 if (m.is_null()) {
2142 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2143 }
2144 oop method;
2145 if (m->is_object_constructor() || m->is_static_init_factory()) {
2146 method = Reflection::new_constructor(m, CHECK_NULL);
2147 } else {
2148 method = Reflection::new_method(m, true, CHECK_NULL);
2149 }
2150 return JNIHandles::make_local(THREAD, method);
2151 }
2152
2153 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2154 {
2155 JvmtiVMObjectAllocEventCollector oam;
2156 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157 bounds_check(cp, index, CHECK_NULL);
2158 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2159 return res;
2160 }
2161 JVM_END
2162
2163 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2164 {
2165 JvmtiVMObjectAllocEventCollector oam;
2166 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2167 bounds_check(cp, index, CHECK_NULL);
2168 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2169 return res;
2170 }
2171 JVM_END
2172
2173 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2174 constantTag tag = cp->tag_at(index);
2175 if (!tag.is_field()) {
2176 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2177 }
2178 int klass_ref = cp->uncached_klass_ref_index_at(index);
2179 Klass* k_o;
2180 if (force_resolution) {
2181 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2182 } else {
2183 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2184 if (k_o == NULL) return NULL;
2185 }
2186 InstanceKlass* k = InstanceKlass::cast(k_o);
2187 Symbol* name = cp->uncached_name_ref_at(index);
2188 Symbol* sig = cp->uncached_signature_ref_at(index);
2189 fieldDescriptor fd;
2190 Klass* target_klass = k->find_field(name, sig, &fd);
2191 if (target_klass == NULL) {
2192 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2193 }
2194 oop field = Reflection::new_field(&fd, CHECK_NULL);
2195 return JNIHandles::make_local(THREAD, field);
2196 }
2197
2198 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2199 {
2200 JvmtiVMObjectAllocEventCollector oam;
2201 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2202 bounds_check(cp, index, CHECK_NULL);
2203 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2204 return res;
2205 }
2206 JVM_END
2207
2208 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2209 {
2210 JvmtiVMObjectAllocEventCollector oam;
2211 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2212 bounds_check(cp, index, CHECK_NULL);
2213 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2214 return res;
2215 }
2216 JVM_END
2217
2218 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2219 {
2220 JvmtiVMObjectAllocEventCollector oam;
2221 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2222 bounds_check(cp, index, CHECK_NULL);
2223 constantTag tag = cp->tag_at(index);
2224 if (!tag.is_field_or_method()) {
2225 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2226 }
2227 int klass_ref = cp->uncached_klass_ref_index_at(index);
2228 Symbol* klass_name = cp->klass_name_at(klass_ref);
2229 Symbol* member_name = cp->uncached_name_ref_at(index);
2230 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2231 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2232 objArrayHandle dest(THREAD, dest_o);
2233 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2234 dest->obj_at_put(0, str());
2235 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2236 dest->obj_at_put(1, str());
2237 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2238 dest->obj_at_put(2, str());
2239 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2240 }
2241 JVM_END
2242
2243 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2244 {
2245 JvmtiVMObjectAllocEventCollector oam;
2246 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2247 bounds_check(cp, index, CHECK_0);
2248 constantTag tag = cp->tag_at(index);
2249 if (!tag.is_field_or_method()) {
2250 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2251 }
2252 return (jint) cp->uncached_klass_ref_index_at(index);
2253 }
2254 JVM_END
2255
2256 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2257 {
2258 JvmtiVMObjectAllocEventCollector oam;
2259 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2260 bounds_check(cp, index, CHECK_0);
2261 constantTag tag = cp->tag_at(index);
2262 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2263 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2264 }
2265 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2266 }
2267 JVM_END
2268
2269 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2270 {
2271 JvmtiVMObjectAllocEventCollector oam;
2272 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2273 bounds_check(cp, index, CHECK_NULL);
2274 constantTag tag = cp->tag_at(index);
2275 if (!tag.is_name_and_type()) {
2276 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2277 }
2278 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2279 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2280 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2281 objArrayHandle dest(THREAD, dest_o);
2282 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2283 dest->obj_at_put(0, str());
2284 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2285 dest->obj_at_put(1, str());
2286 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2287 }
2288 JVM_END
2289
2290 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2291 {
2292 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2293 bounds_check(cp, index, CHECK_0);
2294 constantTag tag = cp->tag_at(index);
2295 if (!tag.is_int()) {
2296 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2297 }
2298 return cp->int_at(index);
2299 }
2300 JVM_END
2301
2302 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2303 {
2304 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2305 bounds_check(cp, index, CHECK_(0L));
2306 constantTag tag = cp->tag_at(index);
2307 if (!tag.is_long()) {
2308 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2309 }
2310 return cp->long_at(index);
2311 }
2312 JVM_END
2313
2314 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2315 {
2316 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2317 bounds_check(cp, index, CHECK_(0.0f));
2318 constantTag tag = cp->tag_at(index);
2319 if (!tag.is_float()) {
2320 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2321 }
2322 return cp->float_at(index);
2323 }
2324 JVM_END
2325
2326 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2327 {
2328 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2329 bounds_check(cp, index, CHECK_(0.0));
2330 constantTag tag = cp->tag_at(index);
2331 if (!tag.is_double()) {
2332 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2333 }
2334 return cp->double_at(index);
2335 }
2336 JVM_END
2337
2338 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2339 {
2340 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2341 bounds_check(cp, index, CHECK_NULL);
2342 constantTag tag = cp->tag_at(index);
2343 if (!tag.is_string()) {
2344 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2345 }
2346 oop str = cp->string_at(index, CHECK_NULL);
2347 return (jstring) JNIHandles::make_local(THREAD, str);
2348 }
2349 JVM_END
2350
2351 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2352 {
2353 JvmtiVMObjectAllocEventCollector oam;
2354 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2355 bounds_check(cp, index, CHECK_NULL);
2356 constantTag tag = cp->tag_at(index);
2357 if (!tag.is_symbol()) {
2358 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2359 }
2360 Symbol* sym = cp->symbol_at(index);
2361 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2362 return (jstring) JNIHandles::make_local(THREAD, str());
2363 }
2364 JVM_END
2365
2366 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2367 {
2368 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2369 bounds_check(cp, index, CHECK_0);
2370 constantTag tag = cp->tag_at(index);
2371 jbyte result = tag.value();
2372 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2373 // they are changed to the corresponding tags from the JVM spec, so that java code in
2374 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2375 if (tag.is_klass_or_reference()) {
2376 result = JVM_CONSTANT_Class;
2377 } else if (tag.is_string_index()) {
2378 result = JVM_CONSTANT_String;
2379 } else if (tag.is_method_type_in_error()) {
2380 result = JVM_CONSTANT_MethodType;
2381 } else if (tag.is_method_handle_in_error()) {
2382 result = JVM_CONSTANT_MethodHandle;
2383 } else if (tag.is_dynamic_constant_in_error()) {
2384 result = JVM_CONSTANT_Dynamic;
2385 }
2386 return result;
2387 }
2388 JVM_END
2389
2390 // Assertion support. //////////////////////////////////////////////////////////
2391
2392 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2393 assert(cls != NULL, "bad class");
2394
2395 oop r = JNIHandles::resolve(cls);
2396 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2397 if (java_lang_Class::is_primitive(r)) return false;
2398
2399 Klass* k = java_lang_Class::as_Klass(r);
2400 assert(k->is_instance_klass(), "must be an instance klass");
2401 if (!k->is_instance_klass()) return false;
2402
2403 ResourceMark rm(THREAD);
2404 const char* name = k->name()->as_C_string();
2405 bool system_class = k->class_loader() == NULL;
2406 return JavaAssertions::enabled(name, system_class);
2407
2408 JVM_END
2409
2410
2411 // Return a new AssertionStatusDirectives object with the fields filled in with
2412 // command-line assertion arguments (i.e., -ea, -da).
2413 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2414 JvmtiVMObjectAllocEventCollector oam;
2415 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2416 return JNIHandles::make_local(THREAD, asd);
2417 JVM_END
2418
2419 // Arrays support /////////////////////////////////////////////////////////////
2420
2421 JVM_ENTRY(jboolean, JVM_ArrayIsAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2422 oop o = JNIHandles::resolve(array);
2423 Klass* k = o->klass();
2424 if ((o == NULL) || (!k->is_array_klass())) {
2425 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2426 }
2427 return ArrayKlass::cast(k)->element_access_is_atomic();
2428 JVM_END
2429
2430 JVM_ENTRY(jobject, JVM_ArrayEnsureAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2431 oop o = JNIHandles::resolve(array);
2432 Klass* k = o->klass();
2433 if ((o == NULL) || (!k->is_array_klass())) {
2434 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2435 }
2436 if (k->is_flatArray_klass()) {
2437 FlatArrayKlass* vk = FlatArrayKlass::cast(k);
2438 if (!vk->element_access_is_atomic()) {
2439 /**
2440 * Need to decide how to implement:
2441 *
2442 * 1) Change to objArrayOop layout, therefore oop->klass() differs so
2443 * then "<atomic>[Qfoo;" klass needs to subclass "[Qfoo;" to pass through
2444 * "checkcast" & "instanceof"
2445 *
2446 * 2) Use extra header in the flatArrayOop to flag atomicity required and
2447 * possibly per instance lock structure. Said info, could be placed in
2448 * "trailer" rather than disturb the current arrayOop
2449 */
2450 Unimplemented();
2451 }
2452 }
2453 return array;
2454 JVM_END
2455
2456 // Verification ////////////////////////////////////////////////////////////////////////////////
2457
2458 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2459
2460 // RedefineClasses support: bug 6214132 caused verification to fail.
2461 // All functions from this section should call the jvmtiThreadSate function:
2462 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2463 // The function returns a Klass* of the _scratch_class if the verifier
2464 // was invoked in the middle of the class redefinition.
2465 // Otherwise it returns its argument value which is the _the_class Klass*.
2466 // Please, refer to the description in the jvmtiThreadSate.hpp.
2467
2468 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2470 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2471 return k->name()->as_utf8();
2472 JVM_END
2473
2474
2475 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2476 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2477 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2478 // types will have length zero if this is not an InstanceKlass
2479 // (length is determined by call to JVM_GetClassCPEntriesCount)
2480 if (k->is_instance_klass()) {
2481 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2482 for (int index = cp->length() - 1; index >= 0; index--) {
2483 constantTag tag = cp->tag_at(index);
2484 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2485 }
2486 }
2487 JVM_END
2488
2489
2490 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2491 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2492 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2493 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2494 JVM_END
2495
2496
2497 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2500 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2501 JVM_END
2502
2503
2504 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2505 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2506 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2507 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2508 JVM_END
2509
2510
2511 // The following methods, used for the verifier, are never called with
2512 // array klasses, so a direct cast to InstanceKlass is safe.
2513 // Typically, these methods are called in a loop with bounds determined
2514 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2515 // zero for arrays.
2516 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2517 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2518 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2519 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2520 int length = method->checked_exceptions_length();
2521 if (length > 0) {
2522 CheckedExceptionElement* table= method->checked_exceptions_start();
2523 for (int i = 0; i < length; i++) {
2524 exceptions[i] = table[i].class_cp_index;
2525 }
2526 }
2527 JVM_END
2528
2529
2530 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2531 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2534 return method->checked_exceptions_length();
2535 JVM_END
2536
2537
2538 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2539 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2540 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2541 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2542 memcpy(code, method->code_base(), method->code_size());
2543 JVM_END
2544
2545
2546 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2547 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2548 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2549 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2550 return method->code_size();
2551 JVM_END
2552
2553
2554 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2555 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2556 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2557 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2558 ExceptionTable extable(method);
2559 entry->start_pc = extable.start_pc(entry_index);
2560 entry->end_pc = extable.end_pc(entry_index);
2561 entry->handler_pc = extable.handler_pc(entry_index);
2562 entry->catchType = extable.catch_type_index(entry_index);
2563 JVM_END
2564
2565
2566 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2567 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2568 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2569 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2570 return method->exception_table_length();
2571 JVM_END
2572
2573
2574 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2577 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2578 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2579 JVM_END
2580
2581
2582 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2583 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2584 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2585 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2586 JVM_END
2587
2588
2589 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2590 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2591 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2592 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2593 return method->max_locals();
2594 JVM_END
2595
2596
2597 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2598 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2599 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2600 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2601 return method->size_of_parameters();
2602 JVM_END
2603
2604
2605 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2606 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2607 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2608 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2609 return method->verifier_max_stack();
2610 JVM_END
2611
2612
2613 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2614 ResourceMark rm(THREAD);
2615 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2616 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2617 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2618 return method->is_object_constructor();
2619 JVM_END
2620
2621
2622 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2623 ResourceMark rm(THREAD);
2624 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2627 return method->is_overpass();
2628 JVM_END
2629
2630 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2631 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2632 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2633 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2634 return method->name()->as_utf8();
2635 JVM_END
2636
2637
2638 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2639 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2640 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2641 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2642 return method->signature()->as_utf8();
2643 JVM_END
2644
2645 /**
2646 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2647 * read entries in the constant pool. Since the old verifier always
2648 * works on a copy of the code, it will not see any rewriting that
2649 * may possibly occur in the middle of verification. So it is important
2650 * that nothing it calls tries to use the cpCache instead of the raw
2651 * constant pool, so we must use cp->uncached_x methods when appropriate.
2652 */
2653 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2654 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2655 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2656 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2657 switch (cp->tag_at(cp_index).value()) {
2658 case JVM_CONSTANT_Fieldref:
2659 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2660 default:
2661 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2662 }
2663 ShouldNotReachHere();
2664 return NULL;
2665 JVM_END
2666
2667
2668 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2669 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2670 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2671 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2672 switch (cp->tag_at(cp_index).value()) {
2673 case JVM_CONSTANT_InterfaceMethodref:
2674 case JVM_CONSTANT_Methodref:
2675 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2676 default:
2677 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2678 }
2679 ShouldNotReachHere();
2680 return NULL;
2681 JVM_END
2682
2683
2684 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2685 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2686 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2687 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2688 switch (cp->tag_at(cp_index).value()) {
2689 case JVM_CONSTANT_InterfaceMethodref:
2690 case JVM_CONSTANT_Methodref:
2691 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2692 default:
2693 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2694 }
2695 ShouldNotReachHere();
2696 return NULL;
2697 JVM_END
2698
2699
2700 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2701 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2702 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2703 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2704 switch (cp->tag_at(cp_index).value()) {
2705 case JVM_CONSTANT_Fieldref:
2706 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2707 default:
2708 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2709 }
2710 ShouldNotReachHere();
2711 return NULL;
2712 JVM_END
2713
2714
2715 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2716 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2717 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2718 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2719 Symbol* classname = cp->klass_name_at(cp_index);
2720 return classname->as_utf8();
2721 JVM_END
2722
2723
2724 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2725 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2726 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2727 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2728 switch (cp->tag_at(cp_index).value()) {
2729 case JVM_CONSTANT_Fieldref: {
2730 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2731 Symbol* classname = cp->klass_name_at(class_index);
2732 return classname->as_utf8();
2733 }
2734 default:
2735 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2736 }
2737 ShouldNotReachHere();
2738 return NULL;
2739 JVM_END
2740
2741
2742 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2743 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2744 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2745 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2746 switch (cp->tag_at(cp_index).value()) {
2747 case JVM_CONSTANT_Methodref:
2748 case JVM_CONSTANT_InterfaceMethodref: {
2749 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2750 Symbol* classname = cp->klass_name_at(class_index);
2751 return classname->as_utf8();
2752 }
2753 default:
2754 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2755 }
2756 ShouldNotReachHere();
2757 return NULL;
2758 JVM_END
2759
2760
2761 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2762 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2763 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2764 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2765 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2766 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2767 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2768 switch (cp->tag_at(cp_index).value()) {
2769 case JVM_CONSTANT_Fieldref: {
2770 Symbol* name = cp->uncached_name_ref_at(cp_index);
2771 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2772 InstanceKlass* ik = InstanceKlass::cast(k_called);
2773 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2774 if (fs.name() == name && fs.signature() == signature) {
2775 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2776 }
2777 }
2778 return -1;
2779 }
2780 default:
2781 fatal("JVM_GetCPFieldModifiers: illegal constant");
2782 }
2783 ShouldNotReachHere();
2784 return 0;
2785 JVM_END
2786
2787
2788 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2789 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2790 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2791 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2792 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2793 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2794 switch (cp->tag_at(cp_index).value()) {
2795 case JVM_CONSTANT_Methodref:
2796 case JVM_CONSTANT_InterfaceMethodref: {
2797 Symbol* name = cp->uncached_name_ref_at(cp_index);
2798 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2799 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2800 int methods_count = methods->length();
2801 for (int i = 0; i < methods_count; i++) {
2802 Method* method = methods->at(i);
2803 if (method->name() == name && method->signature() == signature) {
2804 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2805 }
2806 }
2807 return -1;
2808 }
2809 default:
2810 fatal("JVM_GetCPMethodModifiers: illegal constant");
2811 }
2812 ShouldNotReachHere();
2813 return 0;
2814 JVM_END
2815
2816
2817 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2818
2819 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2820 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2821 JVM_END
2822
2823
2824 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2825 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2826 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2827 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2828 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2829 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2830 JVM_END
2831
2832 // Printing support //////////////////////////////////////////////////
2833 extern "C" {
2834
2835 ATTRIBUTE_PRINTF(3, 0)
2836 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2837 // Reject count values that are negative signed values converted to
2838 // unsigned; see bug 4399518, 4417214
2839 if ((intptr_t)count <= 0) return -1;
2840
2841 int result = os::vsnprintf(str, count, fmt, args);
2842 if (result > 0 && (size_t)result >= count) {
2843 result = -1;
2844 }
2845
2846 return result;
2847 }
2848
2849 ATTRIBUTE_PRINTF(3, 4)
2850 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2851 va_list args;
2852 int len;
2853 va_start(args, fmt);
2854 len = jio_vsnprintf(str, count, fmt, args);
2855 va_end(args);
2856 return len;
2857 }
2858
2859 ATTRIBUTE_PRINTF(2, 3)
2860 int jio_fprintf(FILE* f, const char *fmt, ...) {
2861 int len;
2862 va_list args;
2863 va_start(args, fmt);
2864 len = jio_vfprintf(f, fmt, args);
2865 va_end(args);
2866 return len;
2867 }
2868
2869 ATTRIBUTE_PRINTF(2, 0)
2870 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2871 if (Arguments::vfprintf_hook() != NULL) {
2872 return Arguments::vfprintf_hook()(f, fmt, args);
2873 } else {
2874 return vfprintf(f, fmt, args);
2875 }
2876 }
2877
2878 ATTRIBUTE_PRINTF(1, 2)
2879 JNIEXPORT int jio_printf(const char *fmt, ...) {
2880 int len;
2881 va_list args;
2882 va_start(args, fmt);
2883 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2884 va_end(args);
2885 return len;
2886 }
2887
2888 // HotSpot specific jio method
2889 void jio_print(const char* s, size_t len) {
2890 // Try to make this function as atomic as possible.
2891 if (Arguments::vfprintf_hook() != NULL) {
2892 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2893 } else {
2894 // Make an unused local variable to avoid warning from gcc compiler.
2895 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2896 }
2897 }
2898
2899 } // Extern C
2900
2901 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2902
2903 // In most of the JVM thread support functions we need to access the
2904 // thread through a ThreadsListHandle to prevent it from exiting and
2905 // being reclaimed while we try to operate on it. The exceptions to this
2906 // rule are when operating on the current thread, or if the monitor of
2907 // the target java.lang.Thread is locked at the Java level - in both
2908 // cases the target cannot exit.
2909
2910 static void thread_entry(JavaThread* thread, TRAPS) {
2911 HandleMark hm(THREAD);
2912 Handle obj(THREAD, thread->threadObj());
2913 JavaValue result(T_VOID);
2914 JavaCalls::call_virtual(&result,
2915 obj,
2916 vmClasses::Thread_klass(),
2917 vmSymbols::run_method_name(),
2918 vmSymbols::void_method_signature(),
2919 THREAD);
2920 }
2921
2922
2923 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2924 JavaThread *native_thread = NULL;
2925
2926 // We cannot hold the Threads_lock when we throw an exception,
2927 // due to rank ordering issues. Example: we might need to grab the
2928 // Heap_lock while we construct the exception.
2929 bool throw_illegal_thread_state = false;
2930
2931 // We must release the Threads_lock before we can post a jvmti event
2932 // in Thread::start.
2933 {
2934 // Ensure that the C++ Thread and OSThread structures aren't freed before
2935 // we operate.
2936 MutexLocker mu(Threads_lock);
2937
2938 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2939 // re-starting an already started thread, so we should usually find
2940 // that the JavaThread is null. However for a JNI attached thread
2941 // there is a small window between the Thread object being created
2942 // (with its JavaThread set) and the update to its threadStatus, so we
2943 // have to check for this
2944 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2945 throw_illegal_thread_state = true;
2946 } else {
2947 // We could also check the stillborn flag to see if this thread was already stopped, but
2948 // for historical reasons we let the thread detect that itself when it starts running
2949
2950 jlong size =
2951 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2952 // Allocate the C++ Thread structure and create the native thread. The
2953 // stack size retrieved from java is 64-bit signed, but the constructor takes
2954 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2955 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2956 // - Avoid passing negative values which would result in really large stacks.
2957 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2958 size_t sz = size > 0 ? (size_t) size : 0;
2959 native_thread = new JavaThread(&thread_entry, sz);
2960
2961 // At this point it may be possible that no osthread was created for the
2962 // JavaThread due to lack of memory. Check for this situation and throw
2963 // an exception if necessary. Eventually we may want to change this so
2964 // that we only grab the lock if the thread was created successfully -
2965 // then we can also do this check and throw the exception in the
2966 // JavaThread constructor.
2967 if (native_thread->osthread() != NULL) {
2968 // Note: the current thread is not being used within "prepare".
2969 native_thread->prepare(jthread);
2970 }
2971 }
2972 }
2973
2974 if (throw_illegal_thread_state) {
2975 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2976 }
2977
2978 assert(native_thread != NULL, "Starting null thread?");
2979
2980 if (native_thread->osthread() == NULL) {
2981 ResourceMark rm(thread);
2982 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2983 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2984 // No one should hold a reference to the 'native_thread'.
2985 native_thread->smr_delete();
2986 if (JvmtiExport::should_post_resource_exhausted()) {
2987 JvmtiExport::post_resource_exhausted(
2988 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2989 os::native_thread_creation_failed_msg());
2990 }
2991 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2992 os::native_thread_creation_failed_msg());
2993 }
2994
2995 #if INCLUDE_JFR
2996 if (Jfr::is_recording() && EventThreadStart::is_enabled() &&
2997 EventThreadStart::is_stacktrace_enabled()) {
2998 JfrThreadLocal* tl = native_thread->jfr_thread_local();
2999 // skip Thread.start() and Thread.start0()
3000 tl->set_cached_stack_trace_id(JfrStackTraceRepository::record(thread, 2));
3001 }
3002 #endif
3003
3004 Thread::start(native_thread);
3005
3006 JVM_END
3007
3008
3009 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3010 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3011 // but is thought to be reliable and simple. In the case, where the receiver is the
3012 // same thread as the sender, no VM_Operation is needed.
3013 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3014 ThreadsListHandle tlh(thread);
3015 oop java_throwable = JNIHandles::resolve(throwable);
3016 if (java_throwable == NULL) {
3017 THROW(vmSymbols::java_lang_NullPointerException());
3018 }
3019 oop java_thread = NULL;
3020 JavaThread* receiver = NULL;
3021 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3022 Events::log_exception(thread,
3023 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3024 p2i(receiver), p2i(java_thread), p2i(throwable));
3025
3026 if (is_alive) {
3027 // jthread refers to a live JavaThread.
3028 if (thread == receiver) {
3029 // Exception is getting thrown at self so no VM_Operation needed.
3030 THROW_OOP(java_throwable);
3031 } else {
3032 // Use a VM_Operation to throw the exception.
3033 JavaThread::send_async_exception(java_thread, java_throwable);
3034 }
3035 } else {
3036 // Either:
3037 // - target thread has not been started before being stopped, or
3038 // - target thread already terminated
3039 // We could read the threadStatus to determine which case it is
3040 // but that is overkill as it doesn't matter. We must set the
3041 // stillborn flag for the first case, and if the thread has already
3042 // exited setting this flag has no effect.
3043 java_lang_Thread::set_stillborn(java_thread);
3044 }
3045 JVM_END
3046
3047
3048 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3049 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3050 return java_lang_Thread::is_alive(thread_oop);
3051 JVM_END
3052
3053
3054 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3055 ThreadsListHandle tlh(thread);
3056 JavaThread* receiver = NULL;
3057 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3058 if (is_alive) {
3059 // jthread refers to a live JavaThread, but java_suspend() will
3060 // detect a thread that has started to exit and will ignore it.
3061 receiver->java_suspend();
3062 }
3063 JVM_END
3064
3065
3066 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3067 ThreadsListHandle tlh(thread);
3068 JavaThread* receiver = NULL;
3069 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3070 if (is_alive) {
3071 // jthread refers to a live JavaThread.
3072 receiver->java_resume();
3073 }
3074 JVM_END
3075
3076
3077 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3078 ThreadsListHandle tlh(thread);
3079 oop java_thread = NULL;
3080 JavaThread* receiver = NULL;
3081 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3082 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3083
3084 if (is_alive) {
3085 // jthread refers to a live JavaThread.
3086 Thread::set_priority(receiver, (ThreadPriority)prio);
3087 }
3088 // Implied else: If the JavaThread hasn't started yet, then the
3089 // priority set in the java.lang.Thread object above will be pushed
3090 // down when it does start.
3091 JVM_END
3092
3093
3094 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3095 if (os::dont_yield()) return;
3096 HOTSPOT_THREAD_YIELD();
3097 os::naked_yield();
3098 JVM_END
3099
3100 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3101 assert(event != NULL, "invariant");
3102 assert(event->should_commit(), "invariant");
3103 event->set_time(millis);
3104 event->commit();
3105 }
3106
3107 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3108 if (millis < 0) {
3109 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3110 }
3111
3112 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3113 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3114 }
3115
3116 // Save current thread state and restore it at the end of this block.
3117 // And set new thread state to SLEEPING.
3118 JavaThreadSleepState jtss(thread);
3119
3120 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3121 EventThreadSleep event;
3122
3123 if (millis == 0) {
3124 os::naked_yield();
3125 } else {
3126 ThreadState old_state = thread->osthread()->get_state();
3127 thread->osthread()->set_state(SLEEPING);
3128 if (!thread->sleep(millis)) { // interrupted
3129 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3130 // us while we were sleeping. We do not overwrite those.
3131 if (!HAS_PENDING_EXCEPTION) {
3132 if (event.should_commit()) {
3133 post_thread_sleep_event(&event, millis);
3134 }
3135 HOTSPOT_THREAD_SLEEP_END(1);
3136
3137 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3138 // to properly restore the thread state. That's likely wrong.
3139 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3140 }
3141 }
3142 thread->osthread()->set_state(old_state);
3143 }
3144 if (event.should_commit()) {
3145 post_thread_sleep_event(&event, millis);
3146 }
3147 HOTSPOT_THREAD_SLEEP_END(0);
3148 JVM_END
3149
3150 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3151 oop jthread = thread->threadObj();
3152 assert(jthread != NULL, "no current thread!");
3153 return JNIHandles::make_local(THREAD, jthread);
3154 JVM_END
3155
3156 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3157 ThreadsListHandle tlh(thread);
3158 JavaThread* receiver = NULL;
3159 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3160 if (is_alive) {
3161 // jthread refers to a live JavaThread.
3162 receiver->interrupt();
3163 }
3164 JVM_END
3165
3166
3167 // Return true iff the current thread has locked the object passed in
3168
3169 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3170 if (obj == NULL) {
3171 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3172 }
3173 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3174 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3175 JVM_END
3176
3177
3178 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3179 VM_PrintThreads op;
3180 VMThread::execute(&op);
3181 if (JvmtiExport::should_post_data_dump()) {
3182 JvmtiExport::post_data_dump();
3183 }
3184 JVM_END
3185
3186 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3187 // We don't use a ThreadsListHandle here because the current thread
3188 // must be alive.
3189 oop java_thread = JNIHandles::resolve_non_null(jthread);
3190 JavaThread* thr = java_lang_Thread::thread(java_thread);
3191 if (thread == thr && !thr->has_attached_via_jni()) {
3192 // Thread naming is only supported for the current thread and
3193 // we don't set the name of an attached thread to avoid stepping
3194 // on other programs.
3195 ResourceMark rm(thread);
3196 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3197 os::set_native_thread_name(thread_name);
3198 }
3199 JVM_END
3200
3201 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3202
3203 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3204 ResourceMark rm(THREAD);
3205 JvmtiVMObjectAllocEventCollector oam;
3206 vframeStream vfst(thread);
3207
3208 if (vmClasses::reflect_CallerSensitive_klass() != NULL) {
3209 // This must only be called from SecurityManager.getClassContext
3210 Method* m = vfst.method();
3211 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3212 m->name() == vmSymbols::getClassContext_name() &&
3213 m->signature() == vmSymbols::void_class_array_signature())) {
3214 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3215 }
3216 }
3217
3218 // Collect method holders
3219 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3220 for (; !vfst.at_end(); vfst.security_next()) {
3221 Method* m = vfst.method();
3222 // Native frames are not returned
3223 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3224 Klass* holder = m->method_holder();
3225 assert(holder->is_klass(), "just checking");
3226 klass_array->append(holder);
3227 }
3228 }
3229
3230 // Create result array of type [Ljava/lang/Class;
3231 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3232 // Fill in mirrors corresponding to method holders
3233 for (int i = 0; i < klass_array->length(); i++) {
3234 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3235 }
3236
3237 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3238 JVM_END
3239
3240
3241 // java.lang.Package ////////////////////////////////////////////////////////////////
3242
3243
3244 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3245 ResourceMark rm(THREAD);
3246 JvmtiVMObjectAllocEventCollector oam;
3247 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3248 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3249 return (jstring) JNIHandles::make_local(THREAD, result);
3250 JVM_END
3251
3252
3253 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3254 JvmtiVMObjectAllocEventCollector oam;
3255 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3256 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3257 JVM_END
3258
3259
3260 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3261
3262
3263 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3264 MonitorLocker ml(Heap_lock);
3265 oop ref = Universe::reference_pending_list();
3266 if (ref != NULL) {
3267 Universe::clear_reference_pending_list();
3268 }
3269 return JNIHandles::make_local(THREAD, ref);
3270 JVM_END
3271
3272 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3273 MonitorLocker ml(Heap_lock);
3274 return Universe::has_reference_pending_list();
3275 JVM_END
3276
3277 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3278 MonitorLocker ml(Heap_lock);
3279 while (!Universe::has_reference_pending_list()) {
3280 ml.wait();
3281 }
3282 JVM_END
3283
3284 JVM_ENTRY(jboolean, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3285 oop ref_oop = JNIHandles::resolve_non_null(ref);
3286 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3287 return referent == JNIHandles::resolve(o);
3288 JVM_END
3289
3290 JVM_ENTRY(void, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3291 oop ref_oop = JNIHandles::resolve_non_null(ref);
3292 // FinalReference has it's own implementation of clear().
3293 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3294 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == NULL) {
3295 // If the referent has already been cleared then done.
3296 // However, if the referent is dead but has not yet been cleared by
3297 // concurrent reference processing, it should NOT be cleared here.
3298 // Instead, clearing should be left to the GC. Clearing it here could
3299 // detectably lose an expected notification, which is impossible with
3300 // STW reference processing. The clearing in enqueue() doesn't have
3301 // this problem, since the enqueue covers the notification, but it's not
3302 // worth the effort to handle that case specially.
3303 return;
3304 }
3305 java_lang_ref_Reference::clear_referent(ref_oop);
3306 JVM_END
3307
3308
3309 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3310
3311
3312 JVM_ENTRY(jboolean, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3313 oop ref_oop = JNIHandles::resolve_non_null(ref);
3314 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3315 return referent == JNIHandles::resolve(o);
3316 JVM_END
3317
3318
3319 // ObjectInputStream ///////////////////////////////////////////////////////////////
3320
3321 // Return the first user-defined class loader up the execution stack, or null
3322 // if only code from the bootstrap or platform class loader is on the stack.
3323
3324 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3325 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3326 InstanceKlass* ik = vfst.method()->method_holder();
3327 oop loader = ik->class_loader();
3328 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3329 // Skip reflection related frames
3330 if (!ik->is_subclass_of(vmClasses::reflect_MethodAccessorImpl_klass()) &&
3331 !ik->is_subclass_of(vmClasses::reflect_ConstructorAccessorImpl_klass())) {
3332 return JNIHandles::make_local(THREAD, loader);
3333 }
3334 }
3335 }
3336 return NULL;
3337 JVM_END
3338
3339
3340 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3341
3342
3343 // resolve array handle and check arguments
3344 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3345 if (arr == NULL) {
3346 THROW_0(vmSymbols::java_lang_NullPointerException());
3347 }
3348 oop a = JNIHandles::resolve_non_null(arr);
3349 if (!a->is_array()) {
3350 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3351 } else if (type_array_only && !a->is_typeArray()) {
3352 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3353 }
3354 return arrayOop(a);
3355 }
3356
3357
3358 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3359 arrayOop a = check_array(env, arr, false, CHECK_0);
3360 return a->length();
3361 JVM_END
3362
3363
3364 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3365 JvmtiVMObjectAllocEventCollector oam;
3366 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3367 jvalue value;
3368 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3369 oop box = Reflection::box(&value, type, CHECK_NULL);
3370 return JNIHandles::make_local(THREAD, box);
3371 JVM_END
3372
3373
3374 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3375 jvalue value;
3376 value.i = 0; // to initialize value before getting used in CHECK
3377 arrayOop a = check_array(env, arr, true, CHECK_(value));
3378 assert(a->is_typeArray(), "just checking");
3379 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3380 BasicType wide_type = (BasicType) wCode;
3381 if (type != wide_type) {
3382 Reflection::widen(&value, type, wide_type, CHECK_(value));
3383 }
3384 return value;
3385 JVM_END
3386
3387
3388 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3389 arrayOop a = check_array(env, arr, false, CHECK);
3390 oop box = JNIHandles::resolve(val);
3391 jvalue value;
3392 value.i = 0; // to initialize value before getting used in CHECK
3393 BasicType value_type;
3394 if (a->is_objArray()) {
3395 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3396 value_type = Reflection::unbox_for_regular_object(box, &value);
3397 } else {
3398 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3399 }
3400 Reflection::array_set(&value, a, index, value_type, CHECK);
3401 JVM_END
3402
3403
3404 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3405 arrayOop a = check_array(env, arr, true, CHECK);
3406 assert(a->is_typeArray(), "just checking");
3407 BasicType value_type = (BasicType) vCode;
3408 Reflection::array_set(&v, a, index, value_type, CHECK);
3409 JVM_END
3410
3411
3412 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3413 JvmtiVMObjectAllocEventCollector oam;
3414 oop element_mirror = JNIHandles::resolve(eltClass);
3415 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3416 return JNIHandles::make_local(THREAD, result);
3417 JVM_END
3418
3419
3420 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3421 JvmtiVMObjectAllocEventCollector oam;
3422 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3423 oop element_mirror = JNIHandles::resolve(eltClass);
3424 assert(dim_array->is_typeArray(), "just checking");
3425 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3426 return JNIHandles::make_local(THREAD, result);
3427 JVM_END
3428
3429
3430 // Library support ///////////////////////////////////////////////////////////////////////////
3431
3432 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3433 //%note jvm_ct
3434 char ebuf[1024];
3435 void *load_result;
3436 {
3437 ThreadToNativeFromVM ttnfvm(thread);
3438 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3439 }
3440 if (load_result == NULL) {
3441 char msg[1024];
3442 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3443 // Since 'ebuf' may contain a string encoded using
3444 // platform encoding scheme, we need to pass
3445 // Exceptions::unsafe_to_utf8 to the new_exception method
3446 // as the last argument. See bug 6367357.
3447 Handle h_exception =
3448 Exceptions::new_exception(thread,
3449 vmSymbols::java_lang_UnsatisfiedLinkError(),
3450 msg, Exceptions::unsafe_to_utf8);
3451
3452 THROW_HANDLE_0(h_exception);
3453 }
3454 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3455 return load_result;
3456 JVM_END
3457
3458
3459 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3460 os::dll_unload(handle);
3461 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3462 JVM_END
3463
3464
3465 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3466 void* find_result = os::dll_lookup(handle, name);
3467 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3468 find_result != NULL ? "Found" : "Failed to find",
3469 name, p2i(handle));
3470 return find_result;
3471 JVM_END
3472
3473
3474 // JNI version ///////////////////////////////////////////////////////////////////////////////
3475
3476 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3477 return Threads::is_supported_jni_version_including_1_1(version);
3478 JVM_END
3479
3480
3481 // String support ///////////////////////////////////////////////////////////////////////////
3482
3483 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3484 JvmtiVMObjectAllocEventCollector oam;
3485 if (str == NULL) return NULL;
3486 oop string = JNIHandles::resolve_non_null(str);
3487 oop result = StringTable::intern(string, CHECK_NULL);
3488 return (jstring) JNIHandles::make_local(THREAD, result);
3489 JVM_END
3490
3491
3492 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3493
3494 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3495 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3496 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3497 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3498 // nature. JavaThreads will be "in native" when using this API from JDK code.
3499
3500
3501 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3502 VM_Exit::block_if_vm_exited();
3503 return new os::PlatformMutex();
3504 }
3505
3506
3507 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3508 VM_Exit::block_if_vm_exited();
3509 delete ((os::PlatformMutex*) mon);
3510 }
3511
3512
3513 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3514 VM_Exit::block_if_vm_exited();
3515 ((os::PlatformMutex*) mon)->lock();
3516 return 0;
3517 }
3518
3519
3520 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3521 VM_Exit::block_if_vm_exited();
3522 ((os::PlatformMutex*) mon)->unlock();
3523 }
3524
3525
3526 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3527
3528 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3529 Handle loader, Handle protection_domain,
3530 jboolean throwError, TRAPS) {
3531 // Security Note:
3532 // The Java level wrapper will perform the necessary security check allowing
3533 // us to pass the NULL as the initiating class loader. The VM is responsible for
3534 // the checkPackageAccess relative to the initiating class loader via the
3535 // protection_domain. The protection_domain is passed as NULL by the java code
3536 // if there is no security manager in 3-arg Class.forName().
3537 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3538
3539 // Check if we should initialize the class
3540 if (init && klass->is_instance_klass()) {
3541 klass->initialize(CHECK_NULL);
3542 }
3543 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3544 }
3545
3546
3547 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3548
3549 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3550 Handle method_handle;
3551 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3552 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3553 Handle receiver(THREAD, JNIHandles::resolve(obj));
3554 objArrayHandle args = oopFactory::ensure_objArray(JNIHandles::resolve(args0), CHECK_NULL);
3555 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3556 jobject res = JNIHandles::make_local(THREAD, result);
3557 if (JvmtiExport::should_post_vm_object_alloc()) {
3558 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3559 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3560 if (java_lang_Class::is_primitive(ret_type)) {
3561 // Only for primitive type vm allocates memory for java object.
3562 // See box() method.
3563 JvmtiExport::post_vm_object_alloc(thread, result);
3564 }
3565 }
3566 return res;
3567 } else {
3568 THROW_0(vmSymbols::java_lang_StackOverflowError());
3569 }
3570 JVM_END
3571
3572
3573 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3574 objArrayHandle args = oopFactory::ensure_objArray(JNIHandles::resolve(args0), CHECK_NULL);
3575 oop constructor_mirror = JNIHandles::resolve(c);
3576 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3577 jobject res = JNIHandles::make_local(THREAD, result);
3578 if (JvmtiExport::should_post_vm_object_alloc()) {
3579 JvmtiExport::post_vm_object_alloc(thread, result);
3580 }
3581 return res;
3582 JVM_END
3583
3584 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3585
3586 JVM_LEAF(jboolean, JVM_SupportsCX8())
3587 return VM_Version::supports_cx8();
3588 JVM_END
3589
3590 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3591 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3592 assert(k->is_klass(), "just checking");
3593 HeapShared::initialize_from_archived_subgraph(k, THREAD);
3594 JVM_END
3595
3596 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3597 jclass caller,
3598 jstring interfaceMethodName,
3599 jobject factoryType,
3600 jobject interfaceMethodType,
3601 jobject implementationMember,
3602 jobject dynamicMethodType,
3603 jclass lambdaProxyClass))
3604 #if INCLUDE_CDS
3605 if (!Arguments::is_dumping_archive()) {
3606 return;
3607 }
3608
3609 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3610 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3611 if (caller_ik->is_hidden()) {
3612 // Hidden classes not of type lambda proxy classes are currently not being archived.
3613 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3614 // registered for archiving.
3615 return;
3616 }
3617 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass));
3618 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k);
3619 assert(lambda_ik->is_hidden(), "must be a hidden class");
3620 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3621
3622 Symbol* interface_method_name = NULL;
3623 if (interfaceMethodName != NULL) {
3624 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3625 }
3626 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3627 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3628
3629 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3630 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3631
3632 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3633 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3634 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3635
3636 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3637 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3638
3639 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3640 interface_method_type, m, dynamic_method_type, THREAD);
3641 #endif // INCLUDE_CDS
3642 JVM_END
3643
3644 JVM_ENTRY(jclass, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3645 jclass caller,
3646 jstring interfaceMethodName,
3647 jobject factoryType,
3648 jobject interfaceMethodType,
3649 jobject implementationMember,
3650 jobject dynamicMethodType))
3651 #if INCLUDE_CDS
3652
3653 if (interfaceMethodName == NULL || factoryType == NULL || interfaceMethodType == NULL ||
3654 implementationMember == NULL || dynamicMethodType == NULL) {
3655 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
3656 }
3657
3658 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3659 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3660 if (!caller_ik->is_shared()) {
3661 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3662 return NULL;
3663 }
3664
3665 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3666 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3667 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3668
3669 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3670 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3671
3672 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3673 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3674 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3675
3676 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3677 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3678
3679 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3680 interface_method_type, m, dynamic_method_type);
3681 jclass jcls = NULL;
3682 if (lambda_ik != NULL) {
3683 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3684 jcls = loaded_lambda == NULL ? NULL : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3685 }
3686 return jcls;
3687 #else
3688 return NULL;
3689 #endif // INCLUDE_CDS
3690 JVM_END
3691
3692 JVM_ENTRY(jboolean, JVM_IsCDSDumpingEnabled(JNIEnv* env))
3693 return Arguments::is_dumping_archive();
3694 JVM_END
3695
3696 JVM_ENTRY(jboolean, JVM_IsSharingEnabled(JNIEnv* env))
3697 return UseSharedSpaces;
3698 JVM_END
3699
3700 JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForDumping())
3701 if (DumpSharedSpaces) {
3702 const char* release = Abstract_VM_Version::vm_release();
3703 const char* dbg_level = Abstract_VM_Version::jdk_debug_level();
3704 const char* version = VM_Version::internal_vm_info_string();
3705 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3706 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3707 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3708 seed += (jlong)Abstract_VM_Version::vm_major_version();
3709 seed += (jlong)Abstract_VM_Version::vm_minor_version();
3710 seed += (jlong)Abstract_VM_Version::vm_security_version();
3711 seed += (jlong)Abstract_VM_Version::vm_patch_version();
3712 if (seed == 0) { // don't let this ever be zero.
3713 seed = 0x87654321;
3714 }
3715 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3716 return seed;
3717 } else {
3718 return 0;
3719 }
3720 JVM_END
3721
3722 JVM_ENTRY(jboolean, JVM_IsDumpingClassList(JNIEnv *env))
3723 #if INCLUDE_CDS
3724 return ClassListWriter::is_enabled() || DynamicDumpSharedSpaces;
3725 #else
3726 return false;
3727 #endif // INCLUDE_CDS
3728 JVM_END
3729
3730 JVM_ENTRY(void, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3731 #if INCLUDE_CDS
3732 assert(ClassListWriter::is_enabled() || DynamicDumpSharedSpaces, "Should be set and open or do dynamic dump");
3733 if (line != NULL) {
3734 ResourceMark rm(THREAD);
3735 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3736 char* c_line = java_lang_String::as_utf8_string(h_line());
3737 if (DynamicDumpSharedSpaces) {
3738 // Note: LambdaFormInvokers::append_filtered and LambdaFormInvokers::append take same format which is not
3739 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3740 LambdaFormInvokers::append_filtered(os::strdup((const char*)c_line, mtInternal));
3741 }
3742 if (ClassListWriter::is_enabled()) {
3743 ClassListWriter w;
3744 w.stream()->print_cr("%s %s", LAMBDA_FORM_TAG, c_line);
3745 }
3746 }
3747 #endif // INCLUDE_CDS
3748 JVM_END
3749
3750 JVM_ENTRY(void, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3751 #if INCLUDE_CDS
3752 ResourceMark rm(THREAD);
3753 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3754 char* file_name = java_lang_String::as_utf8_string(file_handle());
3755 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3756 #endif // INCLUDE_CDS
3757 JVM_END
3758
3759 JVM_ENTRY(void, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3760 #if INCLUDE_CDS
3761 ResourceMark rm(THREAD);
3762 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3763 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3764 DynamicArchive::dump(archive_name, CHECK);
3765 #endif // INCLUDE_CDS
3766 JVM_END
3767
3768 // Returns an array of all live Thread objects (VM internal JavaThreads,
3769 // jvmti agent threads, and JNI attaching threads are skipped)
3770 // See CR 6404306 regarding JNI attaching threads
3771 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3772 ResourceMark rm(THREAD);
3773 ThreadsListEnumerator tle(THREAD, false, false);
3774 JvmtiVMObjectAllocEventCollector oam;
3775
3776 int num_threads = tle.num_threads();
3777 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3778 objArrayHandle threads_ah(THREAD, r);
3779
3780 for (int i = 0; i < num_threads; i++) {
3781 Handle h = tle.get_threadObj(i);
3782 threads_ah->obj_at_put(i, h());
3783 }
3784
3785 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3786 JVM_END
3787
3788
3789 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3790 // Return StackTraceElement[][], each element is the stack trace of a thread in
3791 // the corresponding entry in the given threads array
3792 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3793 JvmtiVMObjectAllocEventCollector oam;
3794
3795 // Check if threads is null
3796 if (threads == NULL) {
3797 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3798 }
3799
3800 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3801 objArrayHandle ah(THREAD, a);
3802 int num_threads = ah->length();
3803 // check if threads is non-empty array
3804 if (num_threads == 0) {
3805 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3806 }
3807
3808 // check if threads is not an array of objects of Thread class
3809 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3810 if (k != vmClasses::Thread_klass()) {
3811 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3812 }
3813
3814 ResourceMark rm(THREAD);
3815
3816 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3817 for (int i = 0; i < num_threads; i++) {
3818 oop thread_obj = ah->obj_at(i);
3819 instanceHandle h(THREAD, (instanceOop) thread_obj);
3820 thread_handle_array->append(h);
3821 }
3822
3823 // The JavaThread references in thread_handle_array are validated
3824 // in VM_ThreadDump::doit().
3825 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3826 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3827
3828 JVM_END
3829
3830 // JVM monitoring and management support
3831 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3832 return Management::get_jmm_interface(version);
3833 JVM_END
3834
3835 // com.sun.tools.attach.VirtualMachine agent properties support
3836 //
3837 // Initialize the agent properties with the properties maintained in the VM
3838 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3839 ResourceMark rm;
3840
3841 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3842
3843 PUTPROP(props, "sun.java.command", Arguments::java_command());
3844 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3845 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3846 return properties;
3847 JVM_END
3848
3849 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3850 {
3851 JvmtiVMObjectAllocEventCollector oam;
3852
3853 if (ofClass == NULL) {
3854 return NULL;
3855 }
3856 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3857 // Special handling for primitive objects
3858 if (java_lang_Class::is_primitive(mirror())) {
3859 return NULL;
3860 }
3861 Klass* k = java_lang_Class::as_Klass(mirror());
3862 if (!k->is_instance_klass()) {
3863 return NULL;
3864 }
3865 InstanceKlass* ik = InstanceKlass::cast(k);
3866 int encl_method_class_idx = ik->enclosing_method_class_index();
3867 if (encl_method_class_idx == 0) {
3868 return NULL;
3869 }
3870 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3871 objArrayHandle dest(THREAD, dest_o);
3872 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3873 dest->obj_at_put(0, enc_k->java_mirror());
3874 int encl_method_method_idx = ik->enclosing_method_method_index();
3875 if (encl_method_method_idx != 0) {
3876 Symbol* sym = ik->constants()->symbol_at(
3877 extract_low_short_from_int(
3878 ik->constants()->name_and_type_at(encl_method_method_idx)));
3879 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3880 dest->obj_at_put(1, str());
3881 sym = ik->constants()->symbol_at(
3882 extract_high_short_from_int(
3883 ik->constants()->name_and_type_at(encl_method_method_idx)));
3884 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3885 dest->obj_at_put(2, str());
3886 }
3887 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3888 }
3889 JVM_END
3890
3891 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3892 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3893 ResourceMark rm(THREAD);
3894
3895 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3896 return NULL;
3897 }
3898
3899 char** vm_flags = Arguments::jvm_flags_array();
3900 char** vm_args = Arguments::jvm_args_array();
3901 int num_flags = Arguments::num_jvm_flags();
3902 int num_args = Arguments::num_jvm_args();
3903
3904 InstanceKlass* ik = vmClasses::String_klass();
3905 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3906 objArrayHandle result_h(THREAD, r);
3907
3908 int index = 0;
3909 for (int j = 0; j < num_flags; j++, index++) {
3910 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3911 result_h->obj_at_put(index, h());
3912 }
3913 for (int i = 0; i < num_args; i++, index++) {
3914 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3915 result_h->obj_at_put(index, h());
3916 }
3917 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3918 JVM_END
3919
3920 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3921 return os::get_signal_number(name);
3922 JVM_END