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