1 /*
2 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "cds/classListParser.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/dynamicArchive.hpp"
30 #include "cds/heapShared.hpp"
31 #include "cds/lambdaFormInvokers.hpp"
32 #include "classfile/classFileStream.hpp"
33 #include "classfile/classLoader.hpp"
34 #include "classfile/classLoaderData.hpp"
35 #include "classfile/classLoaderData.inline.hpp"
36 #include "classfile/classLoadInfo.hpp"
37 #include "classfile/javaAssertions.hpp"
38 #include "classfile/javaClasses.inline.hpp"
39 #include "classfile/moduleEntry.hpp"
40 #include "classfile/modules.hpp"
41 #include "classfile/packageEntry.hpp"
42 #include "classfile/stringTable.hpp"
43 #include "classfile/symbolTable.hpp"
44 #include "classfile/systemDictionary.hpp"
45 #include "classfile/vmClasses.hpp"
46 #include "classfile/vmSymbols.hpp"
47 #include "gc/shared/collectedHeap.inline.hpp"
48 #include "interpreter/bytecode.hpp"
49 #include "interpreter/bytecodeUtils.hpp"
50 #include "jfr/jfrEvents.hpp"
51 #include "logging/log.hpp"
52 #include "memory/oopFactory.hpp"
53 #include "memory/referenceType.hpp"
54 #include "memory/resourceArea.hpp"
55 #include "memory/universe.hpp"
56 #include "oops/access.inline.hpp"
57 #include "oops/constantPool.hpp"
58 #include "oops/fieldStreams.inline.hpp"
59 #include "oops/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.inline.hpp"
69 #include "prims/stackwalk.hpp"
70 #include "runtime/arguments.hpp"
71 #include "runtime/atomic.hpp"
72 #include "runtime/continuation.hpp"
73 #include "runtime/globals_extension.hpp"
74 #include "runtime/handles.inline.hpp"
75 #include "runtime/init.hpp"
76 #include "runtime/interfaceSupport.inline.hpp"
77 #include "runtime/deoptimization.hpp"
78 #include "runtime/handshake.hpp"
79 #include "runtime/java.hpp"
80 #include "runtime/javaCalls.hpp"
81 #include "runtime/jfieldIDWorkaround.hpp"
82 #include "runtime/jniHandles.inline.hpp"
83 #include "runtime/os.inline.hpp"
84 #include "runtime/osThread.hpp"
85 #include "runtime/perfData.hpp"
86 #include "runtime/reflection.hpp"
87 #include "runtime/synchronizer.hpp"
88 #include "runtime/thread.inline.hpp"
89 #include "runtime/threadSMR.hpp"
90 #include "runtime/vframe.inline.hpp"
91 #include "runtime/vmOperations.hpp"
92 #include "runtime/vm_version.hpp"
93 #include "services/attachListener.hpp"
94 #include "services/management.hpp"
95 #include "services/threadService.hpp"
96 #include "utilities/copy.hpp"
97 #include "utilities/defaultStream.hpp"
98 #include "utilities/dtrace.hpp"
99 #include "utilities/events.hpp"
100 #include "utilities/macros.hpp"
101 #include "utilities/utf8.hpp"
102 #if INCLUDE_CDS
103 #include "classfile/systemDictionaryShared.hpp"
104 #endif
105 #if INCLUDE_JFR
106 #include "jfr/jfr.hpp"
107 #endif
108
109 #include <errno.h>
110
111 /*
112 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
113 such ctors and calls MUST NOT come between an oop declaration/init and its
114 usage because if objects are move this may cause various memory stomps, bus
115 errors and segfaults. Here is a cookbook for causing so called "naked oop
116 failures":
117
118 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
119 // Object address to be held directly in mirror & not visible to GC
120 oop mirror = JNIHandles::resolve_non_null(ofClass);
121
122 // If this ctor can hit a safepoint, moving objects around, then
123 ComplexConstructor foo;
124
125 // Boom! mirror may point to JUNK instead of the intended object
126 (some dereference of mirror)
127
128 // Here's another call that may block for GC, making mirror stale
129 MutexLocker ml(some_lock);
130
131 // And here's an initializer that can result in a stale oop
132 // all in one step.
133 oop o = call_that_can_throw_exception(TRAPS);
134
135
136 The solution is to keep the oop declaration BELOW the ctor or function
137 call that might cause a GC, do another resolve to reassign the oop, or
138 consider use of a Handle instead of an oop so there is immunity from object
139 motion. But note that the "QUICK" entries below do not have a handlemark
140 and thus can only support use of handles passed in.
141 */
142
143 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
144 ResourceMark rm;
145 int line_number = -1;
146 const char * source_file = NULL;
147 const char * trace = "explicit";
148 InstanceKlass* caller = NULL;
149 JavaThread* jthread = THREAD;
150 if (jthread->has_last_Java_frame()) {
151 vframeStream vfst(jthread);
152
153 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
154 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
155 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
156 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
157 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
158
159 Method* last_caller = NULL;
160
161 while (!vfst.at_end()) {
162 Method* m = vfst.method();
163 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())&&
164 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
165 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
166 break;
167 }
168 last_caller = m;
169 vfst.next();
170 }
171 // if this is called from Class.forName0 and that is called from Class.forName,
172 // then print the caller of Class.forName. If this is Class.loadClass, then print
173 // that caller, otherwise keep quiet since this should be picked up elsewhere.
174 bool found_it = false;
175 if (!vfst.at_end() &&
176 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
177 vfst.method()->name() == vmSymbols::forName0_name()) {
178 vfst.next();
179 if (!vfst.at_end() &&
180 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
181 vfst.method()->name() == vmSymbols::forName_name()) {
182 vfst.next();
183 found_it = true;
184 }
185 } else if (last_caller != NULL &&
186 last_caller->method_holder()->name() ==
187 vmSymbols::java_lang_ClassLoader() &&
188 last_caller->name() == vmSymbols::loadClass_name()) {
189 found_it = true;
190 } else if (!vfst.at_end()) {
191 if (vfst.method()->is_native()) {
192 // JNI call
193 found_it = true;
194 }
195 }
196 if (found_it && !vfst.at_end()) {
197 // found the caller
198 caller = vfst.method()->method_holder();
199 line_number = vfst.method()->line_number_from_bci(vfst.bci());
200 if (line_number == -1) {
201 // show method name if it's a native method
202 trace = vfst.method()->name_and_sig_as_C_string();
203 }
204 Symbol* s = caller->source_file_name();
205 if (s != NULL) {
206 source_file = s->as_C_string();
207 }
208 }
209 }
210 if (caller != NULL) {
211 if (to_class != caller) {
212 const char * from = caller->external_name();
213 const char * to = to_class->external_name();
214 // print in a single call to reduce interleaving between threads
215 if (source_file != NULL) {
216 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
217 } else {
218 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
219 }
220 }
221 }
222 }
223
224 void trace_class_resolution(Klass* to_class) {
225 EXCEPTION_MARK;
226 trace_class_resolution_impl(to_class, THREAD);
227 if (HAS_PENDING_EXCEPTION) {
228 CLEAR_PENDING_EXCEPTION;
229 }
230 }
231
232 // java.lang.System //////////////////////////////////////////////////////////////////////
233
234
235 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
236 return os::javaTimeMillis();
237 JVM_END
238
239 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
240 return os::javaTimeNanos();
241 JVM_END
242
243 // The function below is actually exposed by jdk.internal.misc.VM and not
244 // java.lang.System, but we choose to keep it here so that it stays next
245 // to JVM_CurrentTimeMillis and JVM_NanoTime
246
247 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
248 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
249
250 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
251 jlong seconds;
252 jlong nanos;
253
254 os::javaTimeSystemUTC(seconds, nanos);
255
256 // We're going to verify that the result can fit in a long.
257 // For that we need the difference in seconds between 'seconds'
258 // and 'offset_secs' to be such that:
259 // |seconds - offset_secs| < (2^63/10^9)
260 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
261 // which makes |seconds - offset_secs| < 2^33
262 // and we will prefer +/- 2^32 as the maximum acceptable diff
263 // as 2^32 has a more natural feel than 2^33...
264 //
265 // So if |seconds - offset_secs| >= 2^32 - we return a special
266 // sentinel value (-1) which the caller should take as an
267 // exception value indicating that the offset given to us is
268 // too far from range of the current time - leading to too big
269 // a nano adjustment. The caller is expected to recover by
270 // computing a more accurate offset and calling this method
271 // again. (For the record 2^32 secs is ~136 years, so that
272 // should rarely happen)
273 //
274 jlong diff = seconds - offset_secs;
275 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
276 return -1; // sentinel value: the offset is too far off the target
277 }
278
279 // return the adjustment. If you compute a time by adding
280 // this number of nanoseconds along with the number of seconds
281 // in the offset you should get the current UTC time.
282 return (diff * (jlong)1000000000) + nanos;
283 JVM_END
284
285 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
286 jobject dst, jint dst_pos, jint length))
287 // Check if we have null pointers
288 if (src == NULL || dst == NULL) {
289 THROW(vmSymbols::java_lang_NullPointerException());
290 }
291 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
292 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
293 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
294 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
295 // Do copy
296 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
297 JVM_END
298
299
300 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
301 JavaValue r(T_OBJECT);
302 // public synchronized Object put(Object key, Object value);
303 HandleMark hm(THREAD);
304 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
305 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
306 JavaCalls::call_virtual(&r,
307 props,
308 vmClasses::Properties_klass(),
309 vmSymbols::put_name(),
310 vmSymbols::object_object_object_signature(),
311 key_str,
312 value_str,
313 THREAD);
314 }
315
316
317 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
318
319 /*
320 * Return all of the system properties in a Java String array with alternating
321 * names and values from the jvm SystemProperty.
322 * Which includes some internal and all commandline -D defined properties.
323 */
324 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
325 ResourceMark rm(THREAD);
326 HandleMark hm(THREAD);
327 int ndx = 0;
328 int fixedCount = 2;
329
330 SystemProperty* p = Arguments::system_properties();
331 int count = Arguments::PropertyList_count(p);
332
333 // Allocate result String array
334 InstanceKlass* ik = vmClasses::String_klass();
335 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
336 objArrayHandle result_h(THREAD, r);
337
338 while (p != NULL) {
339 const char * key = p->key();
340 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
341 const char * value = p->value();
342 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
343 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
344 result_h->obj_at_put(ndx * 2, key_str());
345 result_h->obj_at_put(ndx * 2 + 1, value_str());
346 ndx++;
347 }
348 p = p->next();
349 }
350
351 // Convert the -XX:MaxDirectMemorySize= command line flag
352 // to the sun.nio.MaxDirectMemorySize property.
353 // Do this after setting user properties to prevent people
354 // from setting the value with a -D option, as requested.
355 // Leave empty if not supplied
356 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
357 char as_chars[256];
358 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
359 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
360 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
361 result_h->obj_at_put(ndx * 2, key_str());
362 result_h->obj_at_put(ndx * 2 + 1, value_str());
363 ndx++;
364 }
365
366 // JVM monitoring and management support
367 // Add the sun.management.compiler property for the compiler's name
368 {
369 #undef CSIZE
370 #if defined(_LP64) || defined(_WIN64)
371 #define CSIZE "64-Bit "
372 #else
373 #define CSIZE
374 #endif // 64bit
375
376 #if COMPILER1_AND_COMPILER2
377 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
378 #else
379 #if defined(COMPILER1)
380 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
381 #elif defined(COMPILER2)
382 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
383 #elif INCLUDE_JVMCI
384 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
385 #else
386 const char* compiler_name = "";
387 #endif // compilers
388 #endif // COMPILER1_AND_COMPILER2
389
390 if (*compiler_name != '\0' &&
391 (Arguments::mode() != Arguments::_int)) {
392 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
393 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
394 result_h->obj_at_put(ndx * 2, key_str());
395 result_h->obj_at_put(ndx * 2 + 1, value_str());
396 ndx++;
397 }
398 }
399
400 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
401 JVM_END
402
403
404 /*
405 * Return the temporary directory that the VM uses for the attach
406 * and perf data files.
407 *
408 * It is important that this directory is well-known and the
409 * same for all VM instances. It cannot be affected by configuration
410 * variables such as java.io.tmpdir.
411 */
412 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
413 HandleMark hm(THREAD);
414 const char* temp_dir = os::get_temp_directory();
415 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
416 return (jstring) JNIHandles::make_local(THREAD, h());
417 JVM_END
418
419
420 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
421
422 extern volatile jint vm_created;
423
424 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
425 #if INCLUDE_CDS
426 // Link all classes for dynamic CDS dumping before vm exit.
427 if (DynamicDumpSharedSpaces) {
428 DynamicArchive::prepare_for_dynamic_dumping();
429 }
430 #endif
431 EventShutdown event;
432 if (event.should_commit()) {
433 event.set_reason("Shutdown requested from Java");
434 event.commit();
435 }
436 JVM_END
437
438
439 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
440 before_exit(thread);
441 vm_exit(code);
442 JVM_END
443
444
445 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
446 if (!DisableExplicitGC) {
447 EventSystemGC event;
448 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
449 Universe::heap()->collect(GCCause::_java_lang_system_gc);
450 event.commit();
451 }
452 JVM_END
453
454
455 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
456 return Universe::heap()->millis_since_last_whole_heap_examined();
457 JVM_END
458
459
460 static inline jlong convert_size_t_to_jlong(size_t val) {
461 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
462 NOT_LP64 (return (jlong)val;)
463 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
464 }
465
466 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
467 size_t n = Universe::heap()->capacity();
468 return convert_size_t_to_jlong(n);
469 JVM_END
470
471
472 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
473 size_t n = Universe::heap()->unused();
474 return convert_size_t_to_jlong(n);
475 JVM_END
476
477
478 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
479 size_t n = Universe::heap()->max_capacity();
480 return convert_size_t_to_jlong(n);
481 JVM_END
482
483
484 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
485 return os::active_processor_count();
486 JVM_END
487
488 JVM_ENTRY_NO_ENV(jboolean, JVM_IsUseContainerSupport(void))
489 #ifdef LINUX
490 if (UseContainerSupport) {
491 return JNI_TRUE;
492 }
493 #endif
494 return JNI_FALSE;
495 JVM_END
496
497 // java.lang.Throwable //////////////////////////////////////////////////////
498
499 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
500 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
501 java_lang_Throwable::fill_in_stack_trace(exception);
502 JVM_END
503
504 // java.lang.NullPointerException ///////////////////////////////////////////
505
506 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
507 if (!ShowCodeDetailsInExceptionMessages) return NULL;
508
509 oop exc = JNIHandles::resolve_non_null(throwable);
510
511 Method* method;
512 int bci;
513 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
514 return NULL;
515 }
516 if (method->is_native()) {
517 return NULL;
518 }
519
520 stringStream ss;
521 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
522 if (ok) {
523 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
524 return (jstring) JNIHandles::make_local(THREAD, result);
525 } else {
526 return NULL;
527 }
528 JVM_END
529
530 // java.lang.StackTraceElement //////////////////////////////////////////////
531
532
533 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
534 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
535 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
536 objArrayHandle stack_trace(THREAD, st);
537 // Fill in the allocated stack trace
538 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
539 JVM_END
540
541
542 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
543 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
544 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
545 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
546 JVM_END
547
548
549 // java.lang.StackWalker //////////////////////////////////////////////////////
550
551
552 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
553 jint skip_frames, jobject contScope, jobject cont,
554 jint frame_count, jint start_index, jobjectArray frames))
555 if (!thread->has_last_Java_frame()) {
556 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
557 }
558
559 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
560 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
561 Handle cont_h(THREAD, JNIHandles::resolve(cont));
562 // frames array is a Class<?>[] array when only getting caller reference,
563 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
564 // be null.
565 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
566 objArrayHandle frames_array_h(THREAD, fa);
567
568 int limit = start_index + frame_count;
569 if (frames_array_h->length() < limit) {
570 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
571 }
572
573 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
574 frame_count, start_index, frames_array_h, CHECK_NULL);
575 return JNIHandles::make_local(THREAD, result);
576 JVM_END
577
578
579 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
580 jint frame_count, jint start_index,
581 jobjectArray frames))
582 // frames array is a Class<?>[] array when only getting caller reference,
583 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
584 // be null.
585 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
586 objArrayHandle frames_array_h(THREAD, fa);
587
588 int limit = start_index+frame_count;
589 if (frames_array_h->length() < limit) {
590 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
591 }
592
593 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
594 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
595 start_index, frames_array_h, THREAD);
596 JVM_END
597
598 JVM_ENTRY(void, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
599 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
600 objArrayHandle frames_array_h(THREAD, fa);
601 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
602 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
603
604 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
605 JVM_END
606
607 // java.lang.Object ///////////////////////////////////////////////
608
609
610 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
611 // as implemented in the classic virtual machine; return 0 if object is NULL
612 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
613 JVM_END
614
615
616 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
617 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
618 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
619 if (JvmtiExport::should_post_monitor_wait()) {
620 JvmtiExport::post_monitor_wait(thread, obj(), ms);
621
622 // The current thread already owns the monitor and it has not yet
623 // been added to the wait queue so the current thread cannot be
624 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
625 // event handler cannot accidentally consume an unpark() meant for
626 // the ParkEvent associated with this ObjectMonitor.
627 }
628 ObjectSynchronizer::wait(obj, ms, CHECK);
629 JVM_END
630
631
632 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
633 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
634 ObjectSynchronizer::notify(obj, CHECK);
635 JVM_END
636
637
638 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
639 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
640 ObjectSynchronizer::notifyall(obj, CHECK);
641 JVM_END
642
643
644 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
645 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
646 Klass* klass = obj->klass();
647 JvmtiVMObjectAllocEventCollector oam;
648
649 #ifdef ASSERT
650 // Just checking that the cloneable flag is set correct
651 if (obj->is_array()) {
652 guarantee(klass->is_cloneable(), "all arrays are cloneable");
653 } else {
654 guarantee(obj->is_instance(), "should be instanceOop");
655 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
656 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
657 }
658 #endif
659
660 // Check if class of obj supports the Cloneable interface.
661 // All arrays are considered to be cloneable (See JLS 20.1.5).
662 // All j.l.r.Reference classes are considered non-cloneable.
663 if (!klass->is_cloneable() ||
664 (klass->is_instance_klass() &&
665 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
666 ResourceMark rm(THREAD);
667 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
668 }
669
670 // Make shallow object copy
671 const int size = obj->size();
672 oop new_obj_oop = NULL;
673 if (obj->is_array()) {
674 const int length = ((arrayOop)obj())->length();
675 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
676 /* do_zero */ true, CHECK_NULL);
677 } else {
678 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
679 }
680
681 HeapAccess<>::clone(obj(), new_obj_oop, size);
682
683 Handle new_obj(THREAD, new_obj_oop);
684 // Caution: this involves a java upcall, so the clone should be
685 // "gc-robust" by this stage.
686 if (klass->has_finalizer()) {
687 assert(obj->is_instance(), "should be instanceOop");
688 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
689 new_obj = Handle(THREAD, new_obj_oop);
690 }
691
692 return JNIHandles::make_local(THREAD, new_obj());
693 JVM_END
694
695 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
696
697 JVM_ENTRY(void, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
698 CONT_RegisterNativeMethods(env, cls);
699 JVM_END
700
701 // java.io.File ///////////////////////////////////////////////////////////////
702
703 JVM_LEAF(char*, JVM_NativePath(char* path))
704 return os::native_path(path);
705 JVM_END
706
707
708 // Misc. class handling ///////////////////////////////////////////////////////////
709
710
711 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
712 // Getting the class of the caller frame.
713 //
714 // The call stack at this point looks something like this:
715 //
716 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
717 // [1] [ @CallerSensitive API.method ]
718 // [.] [ (skipped intermediate frames) ]
719 // [n] [ caller ]
720 vframeStream vfst(thread);
721 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
722 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
723 Method* m = vfst.method();
724 assert(m != NULL, "sanity");
725 switch (n) {
726 case 0:
727 // This must only be called from Reflection.getCallerClass
728 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
729 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
730 }
731 // fall-through
732 case 1:
733 // Frame 0 and 1 must be caller sensitive.
734 if (!m->caller_sensitive()) {
735 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
736 }
737 break;
738 default:
739 if (!m->is_ignored_by_security_stack_walk()) {
740 // We have reached the desired frame; return the holder class.
741 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
742 }
743 break;
744 }
745 }
746 return NULL;
747 JVM_END
748
749
750 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
751 oop mirror = NULL;
752 BasicType t = name2type(utf);
753 if (t != T_ILLEGAL && !is_reference_type(t)) {
754 mirror = Universe::java_mirror(t);
755 }
756 if (mirror == NULL) {
757 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
758 } else {
759 return (jclass) JNIHandles::make_local(THREAD, mirror);
760 }
761 JVM_END
762
763
764 // Returns a class loaded by the bootstrap class loader; or null
765 // if not found. ClassNotFoundException is not thrown.
766 // FindClassFromBootLoader is exported to the launcher for windows.
767 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
768 const char* name))
769 // Java libraries should ensure that name is never null or illegal.
770 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
771 // It's impossible to create this class; the name cannot fit
772 // into the constant pool.
773 return NULL;
774 }
775 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
776
777 TempNewSymbol h_name = SymbolTable::new_symbol(name);
778 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
779 if (k == NULL) {
780 return NULL;
781 }
782
783 if (log_is_enabled(Debug, class, resolve)) {
784 trace_class_resolution(k);
785 }
786 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
787 JVM_END
788
789 // Find a class with this name in this loader, using the caller's protection domain.
790 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
791 jboolean init, jobject loader,
792 jclass caller))
793 TempNewSymbol h_name =
794 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
795 CHECK_NULL);
796
797 oop loader_oop = JNIHandles::resolve(loader);
798 oop from_class = JNIHandles::resolve(caller);
799 oop protection_domain = NULL;
800 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
801 // NPE. Put it in another way, the bootstrap class loader has all permission and
802 // thus no checkPackageAccess equivalence in the VM class loader.
803 // The caller is also passed as NULL by the java code if there is no security
804 // manager to avoid the performance cost of getting the calling class.
805 if (from_class != NULL && loader_oop != NULL) {
806 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
807 }
808
809 Handle h_loader(THREAD, loader_oop);
810 Handle h_prot(THREAD, protection_domain);
811 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
812 h_prot, false, THREAD);
813
814 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
815 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
816 }
817 return result;
818 JVM_END
819
820 // Currently only called from the old verifier.
821 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
822 jboolean init, jclass from))
823 TempNewSymbol h_name =
824 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
825 CHECK_NULL);
826 oop from_class_oop = JNIHandles::resolve(from);
827 Klass* from_class = (from_class_oop == NULL)
828 ? (Klass*)NULL
829 : java_lang_Class::as_Klass(from_class_oop);
830 oop class_loader = NULL;
831 oop protection_domain = NULL;
832 if (from_class != NULL) {
833 class_loader = from_class->class_loader();
834 protection_domain = from_class->protection_domain();
835 }
836 Handle h_loader(THREAD, class_loader);
837 Handle h_prot (THREAD, protection_domain);
838 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
839 h_prot, true, thread);
840
841 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
842 // this function is generally only used for class loading during verification.
843 ResourceMark rm;
844 oop from_mirror = JNIHandles::resolve_non_null(from);
845 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
846 const char * from_name = from_class->external_name();
847
848 oop mirror = JNIHandles::resolve_non_null(result);
849 Klass* to_class = java_lang_Class::as_Klass(mirror);
850 const char * to = to_class->external_name();
851 log_debug(class, resolve)("%s %s (verification)", from_name, to);
852 }
853
854 return result;
855 JVM_END
856
857 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
858 static jclass jvm_define_class_common(const char *name,
859 jobject loader, const jbyte *buf,
860 jsize len, jobject pd, const char *source,
861 TRAPS) {
862 if (source == NULL) source = "__JVM_DefineClass__";
863
864 JavaThread* jt = THREAD;
865
866 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
867 ClassLoader::perf_define_appclass_selftime(),
868 ClassLoader::perf_define_appclasses(),
869 jt->get_thread_stat()->perf_recursion_counts_addr(),
870 jt->get_thread_stat()->perf_timers_addr(),
871 PerfClassTraceTime::DEFINE_CLASS);
872
873 if (UsePerfData) {
874 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
875 }
876
877 // Class resolution will get the class name from the .class stream if the name is null.
878 TempNewSymbol class_name = name == NULL ? NULL :
879 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
880 CHECK_NULL);
881
882 ResourceMark rm(THREAD);
883 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
884 Handle class_loader (THREAD, JNIHandles::resolve(loader));
885 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
886 ClassLoadInfo cl_info(protection_domain);
887 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
888 class_loader,
889 cl_info,
890 CHECK_NULL);
891
892 if (log_is_enabled(Debug, class, resolve)) {
893 trace_class_resolution(k);
894 }
895
896 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
897 }
898
899 enum {
900 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
901 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
902 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
903 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
904 };
905
906 /*
907 * Define a class with the specified flags that indicates if it's a nestmate,
908 * hidden, or strongly referenced from class loader.
909 */
910 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
911 const jbyte *buf, jsize len, jobject pd,
912 jboolean init, int flags, jobject classData, TRAPS) {
913 ResourceMark rm(THREAD);
914
915 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup));
916 // Lookup class must be a non-null instance
917 if (lookup_k == NULL) {
918 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
919 }
920 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass");
921
922 Handle class_loader (THREAD, lookup_k->class_loader());
923
924 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
925 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
926 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
927 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
928
929 InstanceKlass* host_class = NULL;
930 if (is_nestmate) {
931 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL);
932 }
933
934 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
935 name,
936 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
937 is_nestmate ? host_class->external_name() : "",
938 is_hidden ? "hidden" : "not hidden",
939 is_strong ? "strong" : "weak",
940 vm_annotations ? "with vm annotations" : "without vm annotation");
941
942 if (!is_hidden) {
943 // classData is only applicable for hidden classes
944 if (classData != NULL) {
945 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
946 }
947 if (is_nestmate) {
948 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
949 }
950 if (!is_strong) {
951 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
952 }
953 if (vm_annotations) {
954 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
955 }
956 if (flags != STRONG_LOADER_LINK) {
957 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
958 err_msg("invalid flag 0x%x", flags));
959 }
960 }
961
962 // Class resolution will get the class name from the .class stream if the name is null.
963 TempNewSymbol class_name = name == NULL ? NULL :
964 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
965 CHECK_NULL);
966
967 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
968 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
969 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
970
971 InstanceKlass* ik = NULL;
972 if (!is_hidden) {
973 ClassLoadInfo cl_info(protection_domain);
974 ik = SystemDictionary::resolve_from_stream(&st, class_name,
975 class_loader,
976 cl_info,
977 CHECK_NULL);
978
979 if (log_is_enabled(Debug, class, resolve)) {
980 trace_class_resolution(ik);
981 }
982 } else { // hidden
983 Handle classData_h(THREAD, JNIHandles::resolve(classData));
984 ClassLoadInfo cl_info(protection_domain,
985 host_class,
986 classData_h,
987 is_hidden,
988 is_strong,
989 vm_annotations);
990 ik = SystemDictionary::resolve_from_stream(&st, class_name,
991 class_loader,
992 cl_info,
993 CHECK_NULL);
994
995 // The hidden class loader data has been artificially been kept alive to
996 // this point. The mirror and any instances of this class have to keep
997 // it alive afterwards.
998 ik->class_loader_data()->dec_keep_alive();
999
1000 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1001 ModuleEntry* module = ik->module();
1002 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1003 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1004 module_name,
1005 ik->external_name(),
1006 host_class->external_name(),
1007 ik->is_hidden() ? "is hidden" : "is not hidden");
1008 }
1009 }
1010 assert(Reflection::is_same_class_package(lookup_k, ik),
1011 "lookup class and defined class are in different packages");
1012
1013 if (init) {
1014 ik->initialize(CHECK_NULL);
1015 } else {
1016 ik->link_class(CHECK_NULL);
1017 }
1018
1019 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1020 }
1021
1022 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1023 return jvm_define_class_common(name, loader, buf, len, pd, NULL, THREAD);
1024 JVM_END
1025
1026 /*
1027 * Define a class with the specified lookup class.
1028 * lookup: Lookup class
1029 * name: the name of the class
1030 * buf: class bytes
1031 * len: length of class bytes
1032 * pd: protection domain
1033 * init: initialize the class
1034 * flags: properties of the class
1035 * classData: private static pre-initialized field
1036 */
1037 JVM_ENTRY(jclass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1038 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1039
1040 if (lookup == NULL) {
1041 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1042 }
1043
1044 assert(buf != NULL, "buf must not be NULL");
1045
1046 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1047 JVM_END
1048
1049 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1050
1051 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1052 JVM_END
1053
1054 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1055 ResourceMark rm(THREAD);
1056
1057 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1058 char* str = java_lang_String::as_utf8_string(h_name());
1059
1060 // Sanity check, don't expect null
1061 if (str == NULL) return NULL;
1062
1063 // Internalize the string, converting '.' to '/' in string.
1064 char* p = (char*)str;
1065 while (*p != '\0') {
1066 if (*p == '.') {
1067 *p = '/';
1068 }
1069 p++;
1070 }
1071
1072 const int str_len = (int)(p - str);
1073 if (str_len > Symbol::max_length()) {
1074 // It's impossible to create this class; the name cannot fit
1075 // into the constant pool.
1076 return NULL;
1077 }
1078 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1079
1080 // Security Note:
1081 // The Java level wrapper will perform the necessary security check allowing
1082 // us to pass the NULL as the initiating class loader.
1083 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1084 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1085 h_loader,
1086 Handle());
1087 #if INCLUDE_CDS
1088 if (k == NULL) {
1089 // If the class is not already loaded, try to see if it's in the shared
1090 // archive for the current classloader (h_loader).
1091 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1092 }
1093 #endif
1094 return (k == NULL) ? NULL :
1095 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1096 JVM_END
1097
1098 // Module support //////////////////////////////////////////////////////////////////////////////
1099
1100 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1101 jstring location, jobjectArray packages))
1102 Handle h_module (THREAD, JNIHandles::resolve(module));
1103 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1104 JVM_END
1105
1106 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1107 Handle h_module (THREAD, JNIHandles::resolve(module));
1108 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1109 JVM_END
1110
1111 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1112 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1113 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1114 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1115 JVM_END
1116
1117 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1118 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1119 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1120 JVM_END
1121
1122 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1123 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1124 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1125 JVM_END
1126
1127 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1128 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1129 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1130 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1131 JVM_END
1132
1133 JVM_ENTRY(void, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1134 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1135 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1136 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1137 JVM_END
1138
1139 // Reflection support //////////////////////////////////////////////////////////////////////////////
1140
1141 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1142 assert (cls != NULL, "illegal class");
1143 JvmtiVMObjectAllocEventCollector oam;
1144 ResourceMark rm(THREAD);
1145 HandleMark hm(THREAD);
1146 Handle java_class(THREAD, JNIHandles::resolve(cls));
1147 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1148 return (jstring) JNIHandles::make_local(THREAD, result);
1149 JVM_END
1150
1151
1152 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1153 JvmtiVMObjectAllocEventCollector oam;
1154 oop mirror = JNIHandles::resolve_non_null(cls);
1155
1156 // Special handling for primitive objects
1157 if (java_lang_Class::is_primitive(mirror)) {
1158 // Primitive objects does not have any interfaces
1159 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1160 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1161 }
1162
1163 Klass* klass = java_lang_Class::as_Klass(mirror);
1164 // Figure size of result array
1165 int size;
1166 if (klass->is_instance_klass()) {
1167 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1168 } else {
1169 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1170 size = 2;
1171 }
1172
1173 // Allocate result array
1174 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1175 objArrayHandle result (THREAD, r);
1176 // Fill in result
1177 if (klass->is_instance_klass()) {
1178 // Regular instance klass, fill in all local interfaces
1179 for (int index = 0; index < size; index++) {
1180 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1181 result->obj_at_put(index, k->java_mirror());
1182 }
1183 } else {
1184 // All arrays implement java.lang.Cloneable and java.io.Serializable
1185 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1186 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1187 }
1188 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1189 JVM_END
1190
1191
1192 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1193 oop mirror = JNIHandles::resolve_non_null(cls);
1194 if (java_lang_Class::is_primitive(mirror)) {
1195 return JNI_FALSE;
1196 }
1197 Klass* k = java_lang_Class::as_Klass(mirror);
1198 jboolean result = k->is_interface();
1199 assert(!result || k->is_instance_klass(),
1200 "all interfaces are instance types");
1201 // The compiler intrinsic for isInterface tests the
1202 // Klass::_access_flags bits in the same way.
1203 return result;
1204 JVM_END
1205
1206 JVM_ENTRY(jboolean, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1207 oop mirror = JNIHandles::resolve_non_null(cls);
1208 if (java_lang_Class::is_primitive(mirror)) {
1209 return JNI_FALSE;
1210 }
1211 Klass* k = java_lang_Class::as_Klass(mirror);
1212 return k->is_hidden();
1213 JVM_END
1214
1215 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1216 JvmtiVMObjectAllocEventCollector oam;
1217 oop mirror = JNIHandles::resolve_non_null(cls);
1218 if (java_lang_Class::is_primitive(mirror)) {
1219 // There are no signers for primitive types
1220 return NULL;
1221 }
1222
1223 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1224
1225 // If there are no signers set in the class, or if the class
1226 // is an array, return NULL.
1227 if (signers == NULL) return NULL;
1228
1229 // copy of the signers array
1230 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1231 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1232 for (int index = 0; index < signers->length(); index++) {
1233 signers_copy->obj_at_put(index, signers->obj_at(index));
1234 }
1235
1236 // return the copy
1237 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1238 JVM_END
1239
1240
1241 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1242 oop mirror = JNIHandles::resolve_non_null(cls);
1243 if (!java_lang_Class::is_primitive(mirror)) {
1244 // This call is ignored for primitive types and arrays.
1245 // Signers are only set once, ClassLoader.java, and thus shouldn't
1246 // be called with an array. Only the bootstrap loader creates arrays.
1247 Klass* k = java_lang_Class::as_Klass(mirror);
1248 if (k->is_instance_klass()) {
1249 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1250 }
1251 }
1252 JVM_END
1253
1254
1255 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1256 oop mirror = JNIHandles::resolve_non_null(cls);
1257 if (mirror == NULL) {
1258 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1259 }
1260
1261 if (java_lang_Class::is_primitive(mirror)) {
1262 // Primitive types does not have a protection domain.
1263 return NULL;
1264 }
1265
1266 oop pd = java_lang_Class::protection_domain(mirror);
1267 return (jobject) JNIHandles::make_local(THREAD, pd);
1268 JVM_END
1269
1270
1271 // Returns the inherited_access_control_context field of the running thread.
1272 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1273 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1274 return JNIHandles::make_local(THREAD, result);
1275 JVM_END
1276
1277 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1278 if (!UsePrivilegedStack) return NULL;
1279
1280 ResourceMark rm(THREAD);
1281 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1282 JvmtiVMObjectAllocEventCollector oam;
1283
1284 // count the protection domains on the execution stack. We collapse
1285 // duplicate consecutive protection domains into a single one, as
1286 // well as stopping when we hit a privileged frame.
1287
1288 oop previous_protection_domain = NULL;
1289 Handle privileged_context(thread, NULL);
1290 bool is_privileged = false;
1291 oop protection_domain = NULL;
1292
1293 // Iterate through Java frames
1294 vframeStream vfst(thread);
1295 for(; !vfst.at_end(); vfst.next()) {
1296 // get method of frame
1297 Method* method = vfst.method();
1298
1299 // stop at the first privileged frame
1300 if (method->method_holder() == vmClasses::AccessController_klass() &&
1301 method->name() == vmSymbols::executePrivileged_name())
1302 {
1303 // this frame is privileged
1304 is_privileged = true;
1305
1306 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1307
1308 StackValueCollection* locals = priv->locals();
1309 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1310 StackValue* clr_sv = locals->at(2); // Class<?> caller
1311 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1312 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1313 privileged_context = ctx_sv->get_obj();
1314 Handle caller = clr_sv->get_obj();
1315
1316 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1317 protection_domain = caller_klass->protection_domain();
1318 } else {
1319 protection_domain = method->method_holder()->protection_domain();
1320 }
1321
1322 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1323 local_array->push(Handle(thread, protection_domain));
1324 previous_protection_domain = protection_domain;
1325 }
1326
1327 if (is_privileged) break;
1328 }
1329
1330
1331 // either all the domains on the stack were system domains, or
1332 // we had a privileged system domain
1333 if (local_array->is_empty()) {
1334 if (is_privileged && privileged_context.is_null()) return NULL;
1335
1336 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1337 return JNIHandles::make_local(THREAD, result);
1338 }
1339
1340 objArrayOop context = oopFactory::new_objArray(vmClasses::ProtectionDomain_klass(),
1341 local_array->length(), CHECK_NULL);
1342 objArrayHandle h_context(thread, context);
1343 for (int index = 0; index < local_array->length(); index++) {
1344 h_context->obj_at_put(index, local_array->at(index)());
1345 }
1346
1347 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1348
1349 return JNIHandles::make_local(THREAD, result);
1350 JVM_END
1351
1352
1353 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1355 return (k != NULL) && k->is_array_klass() ? true : false;
1356 JVM_END
1357
1358
1359 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1360 oop mirror = JNIHandles::resolve_non_null(cls);
1361 return (jboolean) java_lang_Class::is_primitive(mirror);
1362 JVM_END
1363
1364
1365 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1366 oop mirror = JNIHandles::resolve_non_null(cls);
1367 if (java_lang_Class::is_primitive(mirror)) {
1368 // Primitive type
1369 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1370 }
1371
1372 Klass* k = java_lang_Class::as_Klass(mirror);
1373 debug_only(int computed_modifiers = k->compute_modifier_flags());
1374 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1375 return k->modifier_flags();
1376 JVM_END
1377
1378
1379 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1380
1381 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1382 JvmtiVMObjectAllocEventCollector oam;
1383 // ofClass is a reference to a java_lang_Class object. The mirror object
1384 // of an InstanceKlass
1385 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1386 if (java_lang_Class::is_primitive(ofMirror) ||
1387 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1388 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1389 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1390 }
1391
1392 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1393 InnerClassesIterator iter(k);
1394
1395 if (iter.length() == 0) {
1396 // Neither an inner nor outer class
1397 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1398 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1399 }
1400
1401 // find inner class info
1402 constantPoolHandle cp(thread, k->constants());
1403 int length = iter.length();
1404
1405 // Allocate temp. result array
1406 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1407 objArrayHandle result (THREAD, r);
1408 int members = 0;
1409
1410 for (; !iter.done(); iter.next()) {
1411 int ioff = iter.inner_class_info_index();
1412 int ooff = iter.outer_class_info_index();
1413
1414 if (ioff != 0 && ooff != 0) {
1415 // Check to see if the name matches the class we're looking for
1416 // before attempting to find the class.
1417 if (cp->klass_name_at_matches(k, ooff)) {
1418 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1419 if (outer_klass == k) {
1420 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1421 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1422
1423 // Throws an exception if outer klass has not declared k as
1424 // an inner klass
1425 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1426
1427 result->obj_at_put(members, inner_klass->java_mirror());
1428 members++;
1429 }
1430 }
1431 }
1432 }
1433
1434 if (members != length) {
1435 // Return array of right length
1436 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1437 for(int i = 0; i < members; i++) {
1438 res->obj_at_put(i, result->obj_at(i));
1439 }
1440 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1441 }
1442
1443 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1444 JVM_END
1445
1446
1447 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1448 {
1449 // ofClass is a reference to a java_lang_Class object.
1450 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1451 if (java_lang_Class::is_primitive(ofMirror)) {
1452 return NULL;
1453 }
1454 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1455 if (!klass->is_instance_klass()) {
1456 return NULL;
1457 }
1458
1459 bool inner_is_member = false;
1460 Klass* outer_klass
1461 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1462 if (outer_klass == NULL) return NULL; // already a top-level class
1463 if (!inner_is_member) return NULL; // a hidden class (inside a method)
1464 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1465 }
1466 JVM_END
1467
1468 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1469 {
1470 oop mirror = JNIHandles::resolve_non_null(cls);
1471 if (java_lang_Class::is_primitive(mirror)) {
1472 return NULL;
1473 }
1474 Klass* klass = java_lang_Class::as_Klass(mirror);
1475 if (!klass->is_instance_klass()) {
1476 return NULL;
1477 }
1478 InstanceKlass* k = InstanceKlass::cast(klass);
1479 int ooff = 0, noff = 0;
1480 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1481 if (noff != 0) {
1482 constantPoolHandle i_cp(thread, k->constants());
1483 Symbol* name = i_cp->symbol_at(noff);
1484 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1485 return (jstring) JNIHandles::make_local(THREAD, str());
1486 }
1487 }
1488 return NULL;
1489 }
1490 JVM_END
1491
1492 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1493 assert (cls != NULL, "illegal class");
1494 JvmtiVMObjectAllocEventCollector oam;
1495 ResourceMark rm(THREAD);
1496 oop mirror = JNIHandles::resolve_non_null(cls);
1497 // Return null for arrays and primatives
1498 if (!java_lang_Class::is_primitive(mirror)) {
1499 Klass* k = java_lang_Class::as_Klass(mirror);
1500 if (k->is_instance_klass()) {
1501 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1502 if (sym == NULL) return NULL;
1503 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1504 return (jstring) JNIHandles::make_local(THREAD, str());
1505 }
1506 }
1507 return NULL;
1508 JVM_END
1509
1510
1511 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1512 assert (cls != NULL, "illegal class");
1513 oop mirror = JNIHandles::resolve_non_null(cls);
1514 // Return null for arrays and primitives
1515 if (!java_lang_Class::is_primitive(mirror)) {
1516 Klass* k = java_lang_Class::as_Klass(mirror);
1517 if (k->is_instance_klass()) {
1518 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1519 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1520 }
1521 }
1522 return NULL;
1523 JVM_END
1524
1525
1526 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1527 // some of this code was adapted from from jni_FromReflectedField
1528
1529 oop reflected = JNIHandles::resolve_non_null(field);
1530 oop mirror = java_lang_reflect_Field::clazz(reflected);
1531 Klass* k = java_lang_Class::as_Klass(mirror);
1532 int slot = java_lang_reflect_Field::slot(reflected);
1533 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1534
1535 InstanceKlass* ik = InstanceKlass::cast(k);
1536 intptr_t offset = ik->field_offset(slot);
1537
1538 if (modifiers & JVM_ACC_STATIC) {
1539 // for static fields we only look in the current class
1540 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1541 assert(false, "cannot find static field");
1542 return false;
1543 }
1544 } else {
1545 // for instance fields we start with the current class and work
1546 // our way up through the superclass chain
1547 if (!ik->find_field_from_offset(offset, false, &fd)) {
1548 assert(false, "cannot find instance field");
1549 return false;
1550 }
1551 }
1552 return true;
1553 }
1554
1555 static Method* jvm_get_method_common(jobject method) {
1556 // some of this code was adapted from from jni_FromReflectedMethod
1557
1558 oop reflected = JNIHandles::resolve_non_null(method);
1559 oop mirror = NULL;
1560 int slot = 0;
1561
1562 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1563 mirror = java_lang_reflect_Constructor::clazz(reflected);
1564 slot = java_lang_reflect_Constructor::slot(reflected);
1565 } else {
1566 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1567 "wrong type");
1568 mirror = java_lang_reflect_Method::clazz(reflected);
1569 slot = java_lang_reflect_Method::slot(reflected);
1570 }
1571 Klass* k = java_lang_Class::as_Klass(mirror);
1572
1573 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1574 assert(m != NULL, "cannot find method");
1575 return m; // caller has to deal with NULL in product mode
1576 }
1577
1578 /* Type use annotations support (JDK 1.8) */
1579
1580 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1581 assert (cls != NULL, "illegal class");
1582 ResourceMark rm(THREAD);
1583 // Return null for arrays and primitives
1584 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1585 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1586 if (k->is_instance_klass()) {
1587 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1588 if (type_annotations != NULL) {
1589 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1590 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1591 }
1592 }
1593 }
1594 return NULL;
1595 JVM_END
1596
1597 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1598 assert (method != NULL, "illegal method");
1599 // method is a handle to a java.lang.reflect.Method object
1600 Method* m = jvm_get_method_common(method);
1601 if (m == NULL) {
1602 return NULL;
1603 }
1604
1605 AnnotationArray* type_annotations = m->type_annotations();
1606 if (type_annotations != NULL) {
1607 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1608 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1609 }
1610
1611 return NULL;
1612 JVM_END
1613
1614 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1615 assert (field != NULL, "illegal field");
1616 fieldDescriptor fd;
1617 bool gotFd = jvm_get_field_common(field, fd);
1618 if (!gotFd) {
1619 return NULL;
1620 }
1621
1622 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1623 JVM_END
1624
1625 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1626 if (!cp->is_within_bounds(index)) {
1627 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1628 }
1629 }
1630
1631 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1632 {
1633 // method is a handle to a java.lang.reflect.Method object
1634 Method* method_ptr = jvm_get_method_common(method);
1635 methodHandle mh (THREAD, method_ptr);
1636 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1637 const int num_params = mh->method_parameters_length();
1638
1639 if (num_params < 0) {
1640 // A -1 return value from method_parameters_length means there is no
1641 // parameter data. Return null to indicate this to the reflection
1642 // API.
1643 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1644 return (jobjectArray)NULL;
1645 } else {
1646 // Otherwise, we return something up to reflection, even if it is
1647 // a zero-length array. Why? Because in some cases this can
1648 // trigger a MalformedParametersException.
1649
1650 // make sure all the symbols are properly formatted
1651 for (int i = 0; i < num_params; i++) {
1652 MethodParametersElement* params = mh->method_parameters_start();
1653 int index = params[i].name_cp_index;
1654 constantPoolHandle cp(THREAD, mh->constants());
1655 bounds_check(cp, index, CHECK_NULL);
1656
1657 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1658 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1659 "Wrong type at constant pool index");
1660 }
1661
1662 }
1663
1664 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1665 objArrayHandle result (THREAD, result_oop);
1666
1667 for (int i = 0; i < num_params; i++) {
1668 MethodParametersElement* params = mh->method_parameters_start();
1669 // For a 0 index, give a NULL symbol
1670 Symbol* sym = 0 != params[i].name_cp_index ?
1671 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1672 int flags = params[i].flags;
1673 oop param = Reflection::new_parameter(reflected_method, i, sym,
1674 flags, CHECK_NULL);
1675 result->obj_at_put(i, param);
1676 }
1677 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1678 }
1679 }
1680 JVM_END
1681
1682 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1683
1684 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1685 {
1686 JvmtiVMObjectAllocEventCollector oam;
1687
1688 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1689 // Exclude primitive types and array types
1690 if (java_lang_Class::is_primitive(ofMirror) ||
1691 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1692 // Return empty array
1693 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1694 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1695 }
1696
1697 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1698 constantPoolHandle cp(THREAD, k->constants());
1699
1700 // Ensure class is linked
1701 k->link_class(CHECK_NULL);
1702
1703 // Allocate result
1704 int num_fields;
1705
1706 if (publicOnly) {
1707 num_fields = 0;
1708 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1709 if (fs.access_flags().is_public()) ++num_fields;
1710 }
1711 } else {
1712 num_fields = k->java_fields_count();
1713 }
1714
1715 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1716 objArrayHandle result (THREAD, r);
1717
1718 int out_idx = 0;
1719 fieldDescriptor fd;
1720 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1721 if (!publicOnly || fs.access_flags().is_public()) {
1722 fd.reinitialize(k, fs.index());
1723 oop field = Reflection::new_field(&fd, CHECK_NULL);
1724 result->obj_at_put(out_idx, field);
1725 ++out_idx;
1726 }
1727 }
1728 assert(out_idx == num_fields, "just checking");
1729 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1730 }
1731 JVM_END
1732
1733 // A class is a record if and only if it is final and a direct subclass of
1734 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1735 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1736 {
1737 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1738 if (k != NULL && k->is_instance_klass()) {
1739 InstanceKlass* ik = InstanceKlass::cast(k);
1740 return ik->is_record();
1741 } else {
1742 return false;
1743 }
1744 }
1745 JVM_END
1746
1747 // Returns an array containing the components of the Record attribute,
1748 // or NULL if the attribute is not present.
1749 //
1750 // Note that this function returns the components of the Record attribute
1751 // even if the class is not a record.
1752 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1753 {
1754 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1755 assert(c->is_instance_klass(), "must be");
1756 InstanceKlass* ik = InstanceKlass::cast(c);
1757
1758 Array<RecordComponent*>* components = ik->record_components();
1759 if (components != NULL) {
1760 JvmtiVMObjectAllocEventCollector oam;
1761 constantPoolHandle cp(THREAD, ik->constants());
1762 int length = components->length();
1763 assert(length >= 0, "unexpected record_components length");
1764 objArrayOop record_components =
1765 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1766 objArrayHandle components_h (THREAD, record_components);
1767
1768 for (int x = 0; x < length; x++) {
1769 RecordComponent* component = components->at(x);
1770 assert(component != NULL, "unexpected NULL record component");
1771 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1772 components_h->obj_at_put(x, component_oop);
1773 }
1774 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1775 }
1776
1777 return NULL;
1778 }
1779 JVM_END
1780
1781 static bool select_method(const methodHandle& method, bool want_constructor) {
1782 if (want_constructor) {
1783 return (method->is_initializer() && !method->is_static());
1784 } else {
1785 return (!method->is_initializer() && !method->is_overpass());
1786 }
1787 }
1788
1789 static jobjectArray get_class_declared_methods_helper(
1790 JNIEnv *env,
1791 jclass ofClass, jboolean publicOnly,
1792 bool want_constructor,
1793 Klass* klass, TRAPS) {
1794
1795 JvmtiVMObjectAllocEventCollector oam;
1796
1797 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1798 // Exclude primitive types and array types
1799 if (java_lang_Class::is_primitive(ofMirror)
1800 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1801 // Return empty array
1802 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1803 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1804 }
1805
1806 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1807
1808 // Ensure class is linked
1809 k->link_class(CHECK_NULL);
1810
1811 Array<Method*>* methods = k->methods();
1812 int methods_length = methods->length();
1813
1814 // Save original method_idnum in case of redefinition, which can change
1815 // the idnum of obsolete methods. The new method will have the same idnum
1816 // but if we refresh the methods array, the counts will be wrong.
1817 ResourceMark rm(THREAD);
1818 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1819 int num_methods = 0;
1820
1821 for (int i = 0; i < methods_length; i++) {
1822 methodHandle method(THREAD, methods->at(i));
1823 if (select_method(method, want_constructor)) {
1824 if (!publicOnly || method->is_public()) {
1825 idnums->push(method->method_idnum());
1826 ++num_methods;
1827 }
1828 }
1829 }
1830
1831 // Allocate result
1832 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1833 objArrayHandle result (THREAD, r);
1834
1835 // Now just put the methods that we selected above, but go by their idnum
1836 // in case of redefinition. The methods can be redefined at any safepoint,
1837 // so above when allocating the oop array and below when creating reflect
1838 // objects.
1839 for (int i = 0; i < num_methods; i++) {
1840 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1841 if (method.is_null()) {
1842 // Method may have been deleted and seems this API can handle null
1843 // Otherwise should probably put a method that throws NSME
1844 result->obj_at_put(i, NULL);
1845 } else {
1846 oop m;
1847 if (want_constructor) {
1848 m = Reflection::new_constructor(method, CHECK_NULL);
1849 } else {
1850 m = Reflection::new_method(method, false, CHECK_NULL);
1851 }
1852 result->obj_at_put(i, m);
1853 }
1854 }
1855
1856 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1857 }
1858
1859 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1860 {
1861 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1862 /*want_constructor*/ false,
1863 vmClasses::reflect_Method_klass(), THREAD);
1864 }
1865 JVM_END
1866
1867 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1868 {
1869 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1870 /*want_constructor*/ true,
1871 vmClasses::reflect_Constructor_klass(), THREAD);
1872 }
1873 JVM_END
1874
1875 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1876 {
1877 oop mirror = JNIHandles::resolve_non_null(cls);
1878 if (java_lang_Class::is_primitive(mirror)) {
1879 // Primitive type
1880 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1881 }
1882
1883 Klass* k = java_lang_Class::as_Klass(mirror);
1884 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1885 }
1886 JVM_END
1887
1888 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1889 {
1890 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1891 assert(c->is_instance_klass(), "must be");
1892 InstanceKlass* ck = InstanceKlass::cast(c);
1893 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1894 assert(m->is_instance_klass(), "must be");
1895 InstanceKlass* mk = InstanceKlass::cast(m);
1896 return ck->has_nestmate_access_to(mk, THREAD);
1897 }
1898 JVM_END
1899
1900 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1901 {
1902 // current is not a primitive or array class
1903 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1904 assert(c->is_instance_klass(), "must be");
1905 InstanceKlass* ck = InstanceKlass::cast(c);
1906 InstanceKlass* host = ck->nest_host(THREAD);
1907 return (jclass) (host == NULL ? NULL :
1908 JNIHandles::make_local(THREAD, host->java_mirror()));
1909 }
1910 JVM_END
1911
1912 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1913 {
1914 // current is not a primitive or array class
1915 ResourceMark rm(THREAD);
1916 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1917 assert(c->is_instance_klass(), "must be");
1918 InstanceKlass* ck = InstanceKlass::cast(c);
1919 InstanceKlass* host = ck->nest_host(THREAD);
1920
1921 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1922 ck->external_name(), host->external_name());
1923 {
1924 JvmtiVMObjectAllocEventCollector oam;
1925 Array<u2>* members = host->nest_members();
1926 int length = members == NULL ? 0 : members->length();
1927
1928 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1929
1930 // nest host is first in the array so make it one bigger
1931 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1932 length + 1, CHECK_NULL);
1933 objArrayHandle result(THREAD, r);
1934 result->obj_at_put(0, host->java_mirror());
1935 if (length != 0) {
1936 int count = 0;
1937 for (int i = 0; i < length; i++) {
1938 int cp_index = members->at(i);
1939 Klass* k = host->constants()->klass_at(cp_index, THREAD);
1940 if (HAS_PENDING_EXCEPTION) {
1941 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1942 return NULL; // propagate VMEs
1943 }
1944 if (log_is_enabled(Trace, class, nestmates)) {
1945 stringStream ss;
1946 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1947 ss.print(" - resolution of nest member %s failed: ", target_member_class);
1948 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1949 log_trace(class, nestmates)("%s", ss.as_string());
1950 }
1951 CLEAR_PENDING_EXCEPTION;
1952 continue;
1953 }
1954 if (k->is_instance_klass()) {
1955 InstanceKlass* ik = InstanceKlass::cast(k);
1956 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1957 if (nest_host_k == host) {
1958 result->obj_at_put(count+1, k->java_mirror());
1959 count++;
1960 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1961 } else {
1962 log_trace(class, nestmates)(" - skipping member %s with different host %s",
1963 ik->external_name(), nest_host_k->external_name());
1964 }
1965 } else {
1966 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1967 k->external_name());
1968 }
1969 }
1970 if (count < length) {
1971 // we had invalid entries so we need to compact the array
1972 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1973 length + 1, count + 1);
1974
1975 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1976 count + 1, CHECK_NULL);
1977 objArrayHandle result2(THREAD, r2);
1978 for (int i = 0; i < count + 1; i++) {
1979 result2->obj_at_put(i, result->obj_at(i));
1980 }
1981 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1982 }
1983 }
1984 else {
1985 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
1986 }
1987 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1988 }
1989 }
1990 JVM_END
1991
1992 JVM_ENTRY(jobjectArray, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1993 {
1994 oop mirror = JNIHandles::resolve_non_null(current);
1995 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1996 Klass* c = java_lang_Class::as_Klass(mirror);
1997 assert(c->is_instance_klass(), "must be");
1998 InstanceKlass* ik = InstanceKlass::cast(c);
1999 ResourceMark rm(THREAD);
2000 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2001 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2002 if (ik->is_sealed()) {
2003 JvmtiVMObjectAllocEventCollector oam;
2004 Array<u2>* subclasses = ik->permitted_subclasses();
2005 int length = subclasses->length();
2006
2007 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2008
2009 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2010 length, CHECK_NULL);
2011 objArrayHandle result(THREAD, r);
2012 int count = 0;
2013 for (int i = 0; i < length; i++) {
2014 int cp_index = subclasses->at(i);
2015 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
2016 if (HAS_PENDING_EXCEPTION) {
2017 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
2018 return NULL; // propagate VMEs
2019 }
2020 if (log_is_enabled(Trace, class, sealed)) {
2021 stringStream ss;
2022 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
2023 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
2024 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
2025 log_trace(class, sealed)("%s", ss.as_string());
2026 }
2027
2028 CLEAR_PENDING_EXCEPTION;
2029 continue;
2030 }
2031 if (k->is_instance_klass()) {
2032 result->obj_at_put(count++, k->java_mirror());
2033 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
2034 }
2035 }
2036 if (count < length) {
2037 // we had invalid entries so we need to compact the array
2038 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2039 count, CHECK_NULL);
2040 objArrayHandle result2(THREAD, r2);
2041 for (int i = 0; i < count; i++) {
2042 result2->obj_at_put(i, result->obj_at(i));
2043 }
2044 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2045 }
2046 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2047 } else {
2048 return NULL;
2049 }
2050 }
2051 JVM_END
2052
2053 // Constant pool access //////////////////////////////////////////////////////////
2054
2055 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2056 {
2057 JvmtiVMObjectAllocEventCollector oam;
2058 oop mirror = JNIHandles::resolve_non_null(cls);
2059 // Return null for primitives and arrays
2060 if (!java_lang_Class::is_primitive(mirror)) {
2061 Klass* k = java_lang_Class::as_Klass(mirror);
2062 if (k->is_instance_klass()) {
2063 InstanceKlass* k_h = InstanceKlass::cast(k);
2064 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2065 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2066 return JNIHandles::make_local(THREAD, jcp());
2067 }
2068 }
2069 return NULL;
2070 }
2071 JVM_END
2072
2073
2074 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2075 {
2076 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2077 return cp->length();
2078 }
2079 JVM_END
2080
2081
2082 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2083 {
2084 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2085 bounds_check(cp, index, CHECK_NULL);
2086 constantTag tag = cp->tag_at(index);
2087 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2088 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2089 }
2090 Klass* k = cp->klass_at(index, CHECK_NULL);
2091 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2092 }
2093 JVM_END
2094
2095 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2096 {
2097 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2098 bounds_check(cp, index, CHECK_NULL);
2099 constantTag tag = cp->tag_at(index);
2100 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2101 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2102 }
2103 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2104 if (k == NULL) return NULL;
2105 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2106 }
2107 JVM_END
2108
2109 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2110 constantTag tag = cp->tag_at(index);
2111 if (!tag.is_method() && !tag.is_interface_method()) {
2112 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2113 }
2114 int klass_ref = cp->uncached_klass_ref_index_at(index);
2115 Klass* k_o;
2116 if (force_resolution) {
2117 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2118 } else {
2119 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2120 if (k_o == NULL) return NULL;
2121 }
2122 InstanceKlass* k = InstanceKlass::cast(k_o);
2123 Symbol* name = cp->uncached_name_ref_at(index);
2124 Symbol* sig = cp->uncached_signature_ref_at(index);
2125 methodHandle m (THREAD, k->find_method(name, sig));
2126 if (m.is_null()) {
2127 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2128 }
2129 oop method;
2130 if (!m->is_initializer() || m->is_static()) {
2131 method = Reflection::new_method(m, true, CHECK_NULL);
2132 } else {
2133 method = Reflection::new_constructor(m, CHECK_NULL);
2134 }
2135 return JNIHandles::make_local(THREAD, method);
2136 }
2137
2138 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2139 {
2140 JvmtiVMObjectAllocEventCollector oam;
2141 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2142 bounds_check(cp, index, CHECK_NULL);
2143 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2144 return res;
2145 }
2146 JVM_END
2147
2148 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2149 {
2150 JvmtiVMObjectAllocEventCollector oam;
2151 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2152 bounds_check(cp, index, CHECK_NULL);
2153 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2154 return res;
2155 }
2156 JVM_END
2157
2158 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2159 constantTag tag = cp->tag_at(index);
2160 if (!tag.is_field()) {
2161 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2162 }
2163 int klass_ref = cp->uncached_klass_ref_index_at(index);
2164 Klass* k_o;
2165 if (force_resolution) {
2166 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2167 } else {
2168 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2169 if (k_o == NULL) return NULL;
2170 }
2171 InstanceKlass* k = InstanceKlass::cast(k_o);
2172 Symbol* name = cp->uncached_name_ref_at(index);
2173 Symbol* sig = cp->uncached_signature_ref_at(index);
2174 fieldDescriptor fd;
2175 Klass* target_klass = k->find_field(name, sig, &fd);
2176 if (target_klass == NULL) {
2177 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2178 }
2179 oop field = Reflection::new_field(&fd, CHECK_NULL);
2180 return JNIHandles::make_local(THREAD, field);
2181 }
2182
2183 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2184 {
2185 JvmtiVMObjectAllocEventCollector oam;
2186 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2187 bounds_check(cp, index, CHECK_NULL);
2188 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2189 return res;
2190 }
2191 JVM_END
2192
2193 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2194 {
2195 JvmtiVMObjectAllocEventCollector oam;
2196 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_NULL);
2198 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2199 return res;
2200 }
2201 JVM_END
2202
2203 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2204 {
2205 JvmtiVMObjectAllocEventCollector oam;
2206 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2207 bounds_check(cp, index, CHECK_NULL);
2208 constantTag tag = cp->tag_at(index);
2209 if (!tag.is_field_or_method()) {
2210 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2211 }
2212 int klass_ref = cp->uncached_klass_ref_index_at(index);
2213 Symbol* klass_name = cp->klass_name_at(klass_ref);
2214 Symbol* member_name = cp->uncached_name_ref_at(index);
2215 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2216 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2217 objArrayHandle dest(THREAD, dest_o);
2218 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2219 dest->obj_at_put(0, str());
2220 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2221 dest->obj_at_put(1, str());
2222 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2223 dest->obj_at_put(2, str());
2224 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2225 }
2226 JVM_END
2227
2228 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2229 {
2230 JvmtiVMObjectAllocEventCollector oam;
2231 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2232 bounds_check(cp, index, CHECK_0);
2233 constantTag tag = cp->tag_at(index);
2234 if (!tag.is_field_or_method()) {
2235 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2236 }
2237 return (jint) cp->uncached_klass_ref_index_at(index);
2238 }
2239 JVM_END
2240
2241 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2242 {
2243 JvmtiVMObjectAllocEventCollector oam;
2244 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2245 bounds_check(cp, index, CHECK_0);
2246 constantTag tag = cp->tag_at(index);
2247 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2248 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2249 }
2250 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2251 }
2252 JVM_END
2253
2254 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2255 {
2256 JvmtiVMObjectAllocEventCollector oam;
2257 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2258 bounds_check(cp, index, CHECK_NULL);
2259 constantTag tag = cp->tag_at(index);
2260 if (!tag.is_name_and_type()) {
2261 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2262 }
2263 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2264 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2265 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2266 objArrayHandle dest(THREAD, dest_o);
2267 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2268 dest->obj_at_put(0, str());
2269 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2270 dest->obj_at_put(1, str());
2271 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2272 }
2273 JVM_END
2274
2275 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2276 {
2277 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2278 bounds_check(cp, index, CHECK_0);
2279 constantTag tag = cp->tag_at(index);
2280 if (!tag.is_int()) {
2281 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2282 }
2283 return cp->int_at(index);
2284 }
2285 JVM_END
2286
2287 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2288 {
2289 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2290 bounds_check(cp, index, CHECK_(0L));
2291 constantTag tag = cp->tag_at(index);
2292 if (!tag.is_long()) {
2293 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2294 }
2295 return cp->long_at(index);
2296 }
2297 JVM_END
2298
2299 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2300 {
2301 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2302 bounds_check(cp, index, CHECK_(0.0f));
2303 constantTag tag = cp->tag_at(index);
2304 if (!tag.is_float()) {
2305 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2306 }
2307 return cp->float_at(index);
2308 }
2309 JVM_END
2310
2311 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2312 {
2313 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2314 bounds_check(cp, index, CHECK_(0.0));
2315 constantTag tag = cp->tag_at(index);
2316 if (!tag.is_double()) {
2317 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2318 }
2319 return cp->double_at(index);
2320 }
2321 JVM_END
2322
2323 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2324 {
2325 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2326 bounds_check(cp, index, CHECK_NULL);
2327 constantTag tag = cp->tag_at(index);
2328 if (!tag.is_string()) {
2329 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2330 }
2331 oop str = cp->string_at(index, CHECK_NULL);
2332 return (jstring) JNIHandles::make_local(THREAD, str);
2333 }
2334 JVM_END
2335
2336 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2337 {
2338 JvmtiVMObjectAllocEventCollector oam;
2339 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2340 bounds_check(cp, index, CHECK_NULL);
2341 constantTag tag = cp->tag_at(index);
2342 if (!tag.is_symbol()) {
2343 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2344 }
2345 Symbol* sym = cp->symbol_at(index);
2346 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2347 return (jstring) JNIHandles::make_local(THREAD, str());
2348 }
2349 JVM_END
2350
2351 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2352 {
2353 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2354 bounds_check(cp, index, CHECK_0);
2355 constantTag tag = cp->tag_at(index);
2356 jbyte result = tag.value();
2357 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2358 // they are changed to the corresponding tags from the JVM spec, so that java code in
2359 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2360 if (tag.is_klass_or_reference()) {
2361 result = JVM_CONSTANT_Class;
2362 } else if (tag.is_string_index()) {
2363 result = JVM_CONSTANT_String;
2364 } else if (tag.is_method_type_in_error()) {
2365 result = JVM_CONSTANT_MethodType;
2366 } else if (tag.is_method_handle_in_error()) {
2367 result = JVM_CONSTANT_MethodHandle;
2368 } else if (tag.is_dynamic_constant_in_error()) {
2369 result = JVM_CONSTANT_Dynamic;
2370 }
2371 return result;
2372 }
2373 JVM_END
2374
2375 // Assertion support. //////////////////////////////////////////////////////////
2376
2377 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2378 assert(cls != NULL, "bad class");
2379
2380 oop r = JNIHandles::resolve(cls);
2381 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2382 if (java_lang_Class::is_primitive(r)) return false;
2383
2384 Klass* k = java_lang_Class::as_Klass(r);
2385 assert(k->is_instance_klass(), "must be an instance klass");
2386 if (!k->is_instance_klass()) return false;
2387
2388 ResourceMark rm(THREAD);
2389 const char* name = k->name()->as_C_string();
2390 bool system_class = k->class_loader() == NULL;
2391 return JavaAssertions::enabled(name, system_class);
2392
2393 JVM_END
2394
2395
2396 // Return a new AssertionStatusDirectives object with the fields filled in with
2397 // command-line assertion arguments (i.e., -ea, -da).
2398 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2399 JvmtiVMObjectAllocEventCollector oam;
2400 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2401 return JNIHandles::make_local(THREAD, asd);
2402 JVM_END
2403
2404 // Verification ////////////////////////////////////////////////////////////////////////////////
2405
2406 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2407
2408 // RedefineClasses support: bug 6214132 caused verification to fail.
2409 // All functions from this section should call the jvmtiThreadSate function:
2410 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2411 // The function returns a Klass* of the _scratch_class if the verifier
2412 // was invoked in the middle of the class redefinition.
2413 // Otherwise it returns its argument value which is the _the_class Klass*.
2414 // Please, refer to the description in the jvmtiThreadSate.hpp.
2415
2416 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2418 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419 return k->name()->as_utf8();
2420 JVM_END
2421
2422
2423 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 // types will have length zero if this is not an InstanceKlass
2427 // (length is determined by call to JVM_GetClassCPEntriesCount)
2428 if (k->is_instance_klass()) {
2429 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2430 for (int index = cp->length() - 1; index >= 0; index--) {
2431 constantTag tag = cp->tag_at(index);
2432 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2433 }
2434 }
2435 JVM_END
2436
2437
2438 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2439 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2440 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2441 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2442 JVM_END
2443
2444
2445 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2448 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2449 JVM_END
2450
2451
2452 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2456 JVM_END
2457
2458
2459 // The following methods, used for the verifier, are never called with
2460 // array klasses, so a direct cast to InstanceKlass is safe.
2461 // Typically, these methods are called in a loop with bounds determined
2462 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2463 // zero for arrays.
2464 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 int length = method->checked_exceptions_length();
2469 if (length > 0) {
2470 CheckedExceptionElement* table= method->checked_exceptions_start();
2471 for (int i = 0; i < length; i++) {
2472 exceptions[i] = table[i].class_cp_index;
2473 }
2474 }
2475 JVM_END
2476
2477
2478 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2480 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2481 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2482 return method->checked_exceptions_length();
2483 JVM_END
2484
2485
2486 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2487 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2488 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2489 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2490 memcpy(code, method->code_base(), method->code_size());
2491 JVM_END
2492
2493
2494 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2495 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2496 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2497 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2498 return method->code_size();
2499 JVM_END
2500
2501
2502 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2506 ExceptionTable extable(method);
2507 entry->start_pc = extable.start_pc(entry_index);
2508 entry->end_pc = extable.end_pc(entry_index);
2509 entry->handler_pc = extable.handler_pc(entry_index);
2510 entry->catchType = extable.catch_type_index(entry_index);
2511 JVM_END
2512
2513
2514 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2517 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2518 return method->exception_table_length();
2519 JVM_END
2520
2521
2522 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2523 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2524 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2525 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2526 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2527 JVM_END
2528
2529
2530 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2531 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2534 JVM_END
2535
2536
2537 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2538 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2539 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2540 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2541 return method->max_locals();
2542 JVM_END
2543
2544
2545 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2548 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2549 return method->size_of_parameters();
2550 JVM_END
2551
2552
2553 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2555 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2556 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2557 return method->verifier_max_stack();
2558 JVM_END
2559
2560
2561 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2562 ResourceMark rm(THREAD);
2563 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2564 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2565 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2566 return method->name() == vmSymbols::object_initializer_name();
2567 JVM_END
2568
2569
2570 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2571 ResourceMark rm(THREAD);
2572 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2573 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2574 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2575 return method->is_overpass();
2576 JVM_END
2577
2578 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2579 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2580 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2581 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2582 return method->name()->as_utf8();
2583 JVM_END
2584
2585
2586 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2587 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2588 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2589 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2590 return method->signature()->as_utf8();
2591 JVM_END
2592
2593 /**
2594 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2595 * read entries in the constant pool. Since the old verifier always
2596 * works on a copy of the code, it will not see any rewriting that
2597 * may possibly occur in the middle of verification. So it is important
2598 * that nothing it calls tries to use the cpCache instead of the raw
2599 * constant pool, so we must use cp->uncached_x methods when appropriate.
2600 */
2601 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2602 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2603 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2604 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2605 switch (cp->tag_at(cp_index).value()) {
2606 case JVM_CONSTANT_Fieldref:
2607 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2608 default:
2609 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2610 }
2611 ShouldNotReachHere();
2612 return NULL;
2613 JVM_END
2614
2615
2616 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2619 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2620 switch (cp->tag_at(cp_index).value()) {
2621 case JVM_CONSTANT_InterfaceMethodref:
2622 case JVM_CONSTANT_Methodref:
2623 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2624 default:
2625 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2626 }
2627 ShouldNotReachHere();
2628 return NULL;
2629 JVM_END
2630
2631
2632 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2633 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2634 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2635 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2636 switch (cp->tag_at(cp_index).value()) {
2637 case JVM_CONSTANT_InterfaceMethodref:
2638 case JVM_CONSTANT_Methodref:
2639 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2640 default:
2641 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2642 }
2643 ShouldNotReachHere();
2644 return NULL;
2645 JVM_END
2646
2647
2648 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2649 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2650 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2652 switch (cp->tag_at(cp_index).value()) {
2653 case JVM_CONSTANT_Fieldref:
2654 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2655 default:
2656 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2657 }
2658 ShouldNotReachHere();
2659 return NULL;
2660 JVM_END
2661
2662
2663 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2664 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2665 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2666 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2667 Symbol* classname = cp->klass_name_at(cp_index);
2668 return classname->as_utf8();
2669 JVM_END
2670
2671
2672 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2673 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2674 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2675 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2676 switch (cp->tag_at(cp_index).value()) {
2677 case JVM_CONSTANT_Fieldref: {
2678 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2679 Symbol* classname = cp->klass_name_at(class_index);
2680 return classname->as_utf8();
2681 }
2682 default:
2683 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2684 }
2685 ShouldNotReachHere();
2686 return NULL;
2687 JVM_END
2688
2689
2690 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2691 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2692 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2693 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2694 switch (cp->tag_at(cp_index).value()) {
2695 case JVM_CONSTANT_Methodref:
2696 case JVM_CONSTANT_InterfaceMethodref: {
2697 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2698 Symbol* classname = cp->klass_name_at(class_index);
2699 return classname->as_utf8();
2700 }
2701 default:
2702 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2703 }
2704 ShouldNotReachHere();
2705 return NULL;
2706 JVM_END
2707
2708
2709 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2710 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2711 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2712 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2713 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2714 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2715 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2716 switch (cp->tag_at(cp_index).value()) {
2717 case JVM_CONSTANT_Fieldref: {
2718 Symbol* name = cp->uncached_name_ref_at(cp_index);
2719 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2720 InstanceKlass* ik = InstanceKlass::cast(k_called);
2721 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2722 if (fs.name() == name && fs.signature() == signature) {
2723 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2724 }
2725 }
2726 return -1;
2727 }
2728 default:
2729 fatal("JVM_GetCPFieldModifiers: illegal constant");
2730 }
2731 ShouldNotReachHere();
2732 return 0;
2733 JVM_END
2734
2735
2736 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2737 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2738 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2739 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2740 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2741 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2742 switch (cp->tag_at(cp_index).value()) {
2743 case JVM_CONSTANT_Methodref:
2744 case JVM_CONSTANT_InterfaceMethodref: {
2745 Symbol* name = cp->uncached_name_ref_at(cp_index);
2746 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2747 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2748 int methods_count = methods->length();
2749 for (int i = 0; i < methods_count; i++) {
2750 Method* method = methods->at(i);
2751 if (method->name() == name && method->signature() == signature) {
2752 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2753 }
2754 }
2755 return -1;
2756 }
2757 default:
2758 fatal("JVM_GetCPMethodModifiers: illegal constant");
2759 }
2760 ShouldNotReachHere();
2761 return 0;
2762 JVM_END
2763
2764
2765 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2766
2767 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2768 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2769 JVM_END
2770
2771
2772 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2773 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2774 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2775 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2776 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2777 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2778 JVM_END
2779
2780 // Printing support //////////////////////////////////////////////////
2781 extern "C" {
2782
2783 ATTRIBUTE_PRINTF(3, 0)
2784 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2785 // Reject count values that are negative signed values converted to
2786 // unsigned; see bug 4399518, 4417214
2787 if ((intptr_t)count <= 0) return -1;
2788
2789 int result = os::vsnprintf(str, count, fmt, args);
2790 if (result > 0 && (size_t)result >= count) {
2791 result = -1;
2792 }
2793
2794 return result;
2795 }
2796
2797 ATTRIBUTE_PRINTF(3, 4)
2798 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2799 va_list args;
2800 int len;
2801 va_start(args, fmt);
2802 len = jio_vsnprintf(str, count, fmt, args);
2803 va_end(args);
2804 return len;
2805 }
2806
2807 ATTRIBUTE_PRINTF(2, 3)
2808 int jio_fprintf(FILE* f, const char *fmt, ...) {
2809 int len;
2810 va_list args;
2811 va_start(args, fmt);
2812 len = jio_vfprintf(f, fmt, args);
2813 va_end(args);
2814 return len;
2815 }
2816
2817 ATTRIBUTE_PRINTF(2, 0)
2818 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2819 if (Arguments::vfprintf_hook() != NULL) {
2820 return Arguments::vfprintf_hook()(f, fmt, args);
2821 } else {
2822 return vfprintf(f, fmt, args);
2823 }
2824 }
2825
2826 ATTRIBUTE_PRINTF(1, 2)
2827 JNIEXPORT int jio_printf(const char *fmt, ...) {
2828 int len;
2829 va_list args;
2830 va_start(args, fmt);
2831 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2832 va_end(args);
2833 return len;
2834 }
2835
2836 // HotSpot specific jio method
2837 void jio_print(const char* s, size_t len) {
2838 // Try to make this function as atomic as possible.
2839 if (Arguments::vfprintf_hook() != NULL) {
2840 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2841 } else {
2842 // Make an unused local variable to avoid warning from gcc compiler.
2843 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2844 }
2845 }
2846
2847 } // Extern C
2848
2849 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2850
2851 // In most of the JVM thread support functions we need to access the
2852 // thread through a ThreadsListHandle to prevent it from exiting and
2853 // being reclaimed while we try to operate on it. The exceptions to this
2854 // rule are when operating on the current thread, or if the monitor of
2855 // the target java.lang.Thread is locked at the Java level - in both
2856 // cases the target cannot exit.
2857
2858 static void thread_entry(JavaThread* thread, TRAPS) {
2859 HandleMark hm(THREAD);
2860 Handle obj(THREAD, thread->threadObj());
2861 JavaValue result(T_VOID);
2862 JavaCalls::call_virtual(&result,
2863 obj,
2864 vmClasses::Thread_klass(),
2865 vmSymbols::run_method_name(),
2866 vmSymbols::void_method_signature(),
2867 THREAD);
2868 }
2869
2870
2871 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2872 JavaThread *native_thread = NULL;
2873
2874 // We cannot hold the Threads_lock when we throw an exception,
2875 // due to rank ordering issues. Example: we might need to grab the
2876 // Heap_lock while we construct the exception.
2877 bool throw_illegal_thread_state = false;
2878
2879 // We must release the Threads_lock before we can post a jvmti event
2880 // in Thread::start.
2881 {
2882 // Ensure that the C++ Thread and OSThread structures aren't freed before
2883 // we operate.
2884 MutexLocker mu(Threads_lock);
2885
2886 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2887 // re-starting an already started thread, so we should usually find
2888 // that the JavaThread is null. However for a JNI attached thread
2889 // there is a small window between the Thread object being created
2890 // (with its JavaThread set) and the update to its threadStatus, so we
2891 // have to check for this
2892 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2893 throw_illegal_thread_state = true;
2894 } else {
2895 // We could also check the stillborn flag to see if this thread was already stopped, but
2896 // for historical reasons we let the thread detect that itself when it starts running
2897
2898 jlong size =
2899 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2900 // Allocate the C++ Thread structure and create the native thread. The
2901 // stack size retrieved from java is 64-bit signed, but the constructor takes
2902 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2903 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2904 // - Avoid passing negative values which would result in really large stacks.
2905 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2906 size_t sz = size > 0 ? (size_t) size : 0;
2907 native_thread = new JavaThread(&thread_entry, sz);
2908
2909 // At this point it may be possible that no osthread was created for the
2910 // JavaThread due to lack of memory. Check for this situation and throw
2911 // an exception if necessary. Eventually we may want to change this so
2912 // that we only grab the lock if the thread was created successfully -
2913 // then we can also do this check and throw the exception in the
2914 // JavaThread constructor.
2915 if (native_thread->osthread() != NULL) {
2916 // Note: the current thread is not being used within "prepare".
2917 native_thread->prepare(jthread);
2918 }
2919 }
2920 }
2921
2922 if (throw_illegal_thread_state) {
2923 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2924 }
2925
2926 assert(native_thread != NULL, "Starting null thread?");
2927
2928 if (native_thread->osthread() == NULL) {
2929 ResourceMark rm(thread);
2930 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2931 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2932 // No one should hold a reference to the 'native_thread'.
2933 native_thread->smr_delete();
2934 if (JvmtiExport::should_post_resource_exhausted()) {
2935 JvmtiExport::post_resource_exhausted(
2936 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2937 os::native_thread_creation_failed_msg());
2938 }
2939 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2940 os::native_thread_creation_failed_msg());
2941 }
2942
2943 #if INCLUDE_JFR
2944 if (Jfr::is_recording() && EventThreadStart::is_enabled() &&
2945 EventThreadStart::is_stacktrace_enabled()) {
2946 JfrThreadLocal* tl = native_thread->jfr_thread_local();
2947 // skip Thread.start() and Thread.start0()
2948 tl->set_cached_stack_trace_id(JfrStackTraceRepository::record(thread, 2));
2949 }
2950 #endif
2951
2952 Thread::start(native_thread);
2953
2954 JVM_END
2955
2956
2957 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2958 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2959 // but is thought to be reliable and simple. In the case, where the receiver is the
2960 // same thread as the sender, no VM_Operation is needed.
2961 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2962 ThreadsListHandle tlh(thread);
2963 oop java_throwable = JNIHandles::resolve(throwable);
2964 if (java_throwable == NULL) {
2965 THROW(vmSymbols::java_lang_NullPointerException());
2966 }
2967 oop java_thread = NULL;
2968 JavaThread* receiver = NULL;
2969 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2970 Events::log_exception(thread,
2971 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2972 p2i(receiver), p2i(java_thread), p2i(throwable));
2973
2974 if (is_alive) {
2975 // jthread refers to a live JavaThread.
2976 if (thread == receiver) {
2977 // Exception is getting thrown at self so no VM_Operation needed.
2978 THROW_OOP(java_throwable);
2979 } else {
2980 // Use a VM_Operation to throw the exception.
2981 JavaThread::send_async_exception(receiver, java_throwable);
2982 }
2983 } else {
2984 // Either:
2985 // - target thread has not been started before being stopped, or
2986 // - target thread already terminated
2987 // We could read the threadStatus to determine which case it is
2988 // but that is overkill as it doesn't matter. We must set the
2989 // stillborn flag for the first case, and if the thread has already
2990 // exited setting this flag has no effect.
2991 java_lang_Thread::set_stillborn(java_thread);
2992 }
2993 JVM_END
2994
2995
2996 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2997 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2998 return java_lang_Thread::is_alive(thread_oop);
2999 JVM_END
3000
3001
3002 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3003 ThreadsListHandle tlh(thread);
3004 JavaThread* receiver = NULL;
3005 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3006 if (is_alive) {
3007 // jthread refers to a live JavaThread, but java_suspend() will
3008 // detect a thread that has started to exit and will ignore it.
3009 receiver->java_suspend();
3010 }
3011 JVM_END
3012
3013
3014 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3015 ThreadsListHandle tlh(thread);
3016 JavaThread* receiver = NULL;
3017 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3018 if (is_alive) {
3019 // jthread refers to a live JavaThread.
3020 receiver->java_resume();
3021 }
3022 JVM_END
3023
3024
3025 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3026 ThreadsListHandle tlh(thread);
3027 oop java_thread = NULL;
3028 JavaThread* receiver = NULL;
3029 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3030 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3031
3032 if (is_alive) {
3033 // jthread refers to a live JavaThread.
3034 Thread::set_priority(receiver, (ThreadPriority)prio);
3035 }
3036 // Implied else: If the JavaThread hasn't started yet, then the
3037 // priority set in the java.lang.Thread object above will be pushed
3038 // down when it does start.
3039 JVM_END
3040
3041
3042 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3043 if (os::dont_yield()) return;
3044 HOTSPOT_THREAD_YIELD();
3045 os::naked_yield();
3046 JVM_END
3047
3048 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3049 if (millis < 0) {
3050 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3051 }
3052
3053 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3054 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3055 }
3056
3057 // Save current thread state and restore it at the end of this block.
3058 // And set new thread state to SLEEPING.
3059 JavaThreadSleepState jtss(thread);
3060
3061 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3062
3063 if (millis == 0) {
3064 os::naked_yield();
3065 } else {
3066 ThreadState old_state = thread->osthread()->get_state();
3067 thread->osthread()->set_state(SLEEPING);
3068 if (!thread->sleep(millis)) { // interrupted
3069 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3070 // us while we were sleeping. We do not overwrite those.
3071 if (!HAS_PENDING_EXCEPTION) {
3072 HOTSPOT_THREAD_SLEEP_END(1);
3073
3074 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3075 // to properly restore the thread state. That's likely wrong.
3076 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3077 }
3078 }
3079 thread->osthread()->set_state(old_state);
3080 }
3081 HOTSPOT_THREAD_SLEEP_END(0);
3082 JVM_END
3083
3084 JVM_ENTRY(jobject, JVM_CurrentThread0(JNIEnv* env, jclass threadClass))
3085 oop jthread = thread->threadObj();
3086 assert(jthread != NULL, "no current thread!");
3087 return JNIHandles::make_local(THREAD, jthread);
3088 JVM_END
3089
3090 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3091 ThreadsListHandle tlh(thread);
3092 JavaThread* receiver = NULL;
3093 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3094 if (is_alive) {
3095 // jthread refers to a live JavaThread.
3096 receiver->interrupt();
3097 }
3098 JVM_END
3099
3100 JVM_ENTRY(jobject, JVM_ScopeLocalCache(JNIEnv* env, jclass threadClass))
3101 oop theCache = thread->scopeLocalCache();
3102 if (theCache) {
3103 arrayOop objs = arrayOop(theCache);
3104 assert(objs->length() == ScopeLocalCacheSize * 2, "wrong length");
3105 }
3106 return JNIHandles::make_local(THREAD, theCache);
3107 JVM_END
3108
3109 JVM_ENTRY(void, JVM_SetScopeLocalCache(JNIEnv* env, jclass threadClass,
3110 jobject theCache))
3111 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3112 if (objs != NULL) {
3113 assert(objs->length() == ScopeLocalCacheSize * 2, "wrong length");
3114 }
3115 thread->set_scopeLocalCache(objs);
3116 JVM_END
3117
3118 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3119 oop theThread = thread->vthread();
3120 assert (theThread != (oop)NULL, "no current thread!");
3121 return JNIHandles::make_local(THREAD, theThread);
3122 JVM_END
3123
3124 JVM_ENTRY(void, JVM_SetCurrentThread(JNIEnv* env, jclass threadClass,
3125 jobject theThread))
3126 thread->set_vthread(JNIHandles::resolve(theThread));
3127 JVM_END
3128
3129 // Return true iff the current thread has locked the object passed in
3130
3131 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3132 if (obj == NULL) {
3133 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3134 }
3135 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3136 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3137 JVM_END
3138
3139 JVM_ENTRY(jobject, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3140 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3141 return JNIHandles::make_local(THREAD, trace);
3142 JVM_END
3143
3144 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3145 VM_PrintThreads op;
3146 VMThread::execute(&op);
3147 if (JvmtiExport::should_post_data_dump()) {
3148 JvmtiExport::post_data_dump();
3149 }
3150 JVM_END
3151
3152 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3153 // We don't use a ThreadsListHandle here because the current thread
3154 // must be alive.
3155 oop java_thread = JNIHandles::resolve_non_null(jthread);
3156 JavaThread* thr = java_lang_Thread::thread(java_thread);
3157 if (thread == thr && !thr->has_attached_via_jni()) {
3158 // Thread naming is only supported for the current thread and
3159 // we don't set the name of an attached thread to avoid stepping
3160 // on other programs.
3161 ResourceMark rm(thread);
3162 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3163 os::set_native_thread_name(thread_name);
3164 }
3165 JVM_END
3166
3167 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3168
3169 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3170 ResourceMark rm(THREAD);
3171 JvmtiVMObjectAllocEventCollector oam;
3172 vframeStream vfst(thread);
3173
3174 if (vmClasses::reflect_CallerSensitive_klass() != NULL) {
3175 // This must only be called from SecurityManager.getClassContext
3176 Method* m = vfst.method();
3177 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3178 m->name() == vmSymbols::getClassContext_name() &&
3179 m->signature() == vmSymbols::void_class_array_signature())) {
3180 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3181 }
3182 }
3183
3184 // Collect method holders
3185 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3186 for (; !vfst.at_end(); vfst.security_next()) {
3187 Method* m = vfst.method();
3188 // Native frames are not returned
3189 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3190 Klass* holder = m->method_holder();
3191 assert(holder->is_klass(), "just checking");
3192 klass_array->append(holder);
3193 }
3194 }
3195
3196 // Create result array of type [Ljava/lang/Class;
3197 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3198 // Fill in mirrors corresponding to method holders
3199 for (int i = 0; i < klass_array->length(); i++) {
3200 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3201 }
3202
3203 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3204 JVM_END
3205
3206
3207 // java.lang.Package ////////////////////////////////////////////////////////////////
3208
3209
3210 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3211 ResourceMark rm(THREAD);
3212 JvmtiVMObjectAllocEventCollector oam;
3213 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3214 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3215 return (jstring) JNIHandles::make_local(THREAD, result);
3216 JVM_END
3217
3218
3219 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3220 JvmtiVMObjectAllocEventCollector oam;
3221 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3222 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3223 JVM_END
3224
3225
3226 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3227
3228
3229 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3230 MonitorLocker ml(Heap_lock);
3231 oop ref = Universe::reference_pending_list();
3232 if (ref != NULL) {
3233 Universe::clear_reference_pending_list();
3234 }
3235 return JNIHandles::make_local(THREAD, ref);
3236 JVM_END
3237
3238 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3239 MonitorLocker ml(Heap_lock);
3240 return Universe::has_reference_pending_list();
3241 JVM_END
3242
3243 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3244 MonitorLocker ml(Heap_lock);
3245 while (!Universe::has_reference_pending_list()) {
3246 ml.wait();
3247 }
3248 JVM_END
3249
3250 JVM_ENTRY(jboolean, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3251 oop ref_oop = JNIHandles::resolve_non_null(ref);
3252 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3253 return referent == JNIHandles::resolve(o);
3254 JVM_END
3255
3256 JVM_ENTRY(void, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3257 oop ref_oop = JNIHandles::resolve_non_null(ref);
3258 // FinalReference has it's own implementation of clear().
3259 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3260 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == NULL) {
3261 // If the referent has already been cleared then done.
3262 // However, if the referent is dead but has not yet been cleared by
3263 // concurrent reference processing, it should NOT be cleared here.
3264 // Instead, clearing should be left to the GC. Clearing it here could
3265 // detectably lose an expected notification, which is impossible with
3266 // STW reference processing. The clearing in enqueue() doesn't have
3267 // this problem, since the enqueue covers the notification, but it's not
3268 // worth the effort to handle that case specially.
3269 return;
3270 }
3271 java_lang_ref_Reference::clear_referent(ref_oop);
3272 JVM_END
3273
3274
3275 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3276
3277
3278 JVM_ENTRY(jboolean, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3279 oop ref_oop = JNIHandles::resolve_non_null(ref);
3280 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3281 return referent == JNIHandles::resolve(o);
3282 JVM_END
3283
3284
3285 // ObjectInputStream ///////////////////////////////////////////////////////////////
3286
3287 // Return the first user-defined class loader up the execution stack, or null
3288 // if only code from the bootstrap or platform class loader is on the stack.
3289
3290 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3291 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3292 InstanceKlass* ik = vfst.method()->method_holder();
3293 oop loader = ik->class_loader();
3294 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3295 // Skip reflection related frames
3296 if (!ik->is_subclass_of(vmClasses::reflect_MethodAccessorImpl_klass()) &&
3297 !ik->is_subclass_of(vmClasses::reflect_ConstructorAccessorImpl_klass())) {
3298 return JNIHandles::make_local(THREAD, loader);
3299 }
3300 }
3301 }
3302 return NULL;
3303 JVM_END
3304
3305
3306 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3307
3308
3309 // resolve array handle and check arguments
3310 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3311 if (arr == NULL) {
3312 THROW_0(vmSymbols::java_lang_NullPointerException());
3313 }
3314 oop a = JNIHandles::resolve_non_null(arr);
3315 if (!a->is_array()) {
3316 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3317 } else if (type_array_only && !a->is_typeArray()) {
3318 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3319 }
3320 return arrayOop(a);
3321 }
3322
3323
3324 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3325 arrayOop a = check_array(env, arr, false, CHECK_0);
3326 return a->length();
3327 JVM_END
3328
3329
3330 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3331 JvmtiVMObjectAllocEventCollector oam;
3332 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3333 jvalue value;
3334 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3335 oop box = Reflection::box(&value, type, CHECK_NULL);
3336 return JNIHandles::make_local(THREAD, box);
3337 JVM_END
3338
3339
3340 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3341 jvalue value;
3342 value.i = 0; // to initialize value before getting used in CHECK
3343 arrayOop a = check_array(env, arr, true, CHECK_(value));
3344 assert(a->is_typeArray(), "just checking");
3345 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3346 BasicType wide_type = (BasicType) wCode;
3347 if (type != wide_type) {
3348 Reflection::widen(&value, type, wide_type, CHECK_(value));
3349 }
3350 return value;
3351 JVM_END
3352
3353
3354 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3355 arrayOop a = check_array(env, arr, false, CHECK);
3356 oop box = JNIHandles::resolve(val);
3357 jvalue value;
3358 value.i = 0; // to initialize value before getting used in CHECK
3359 BasicType value_type;
3360 if (a->is_objArray()) {
3361 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3362 value_type = Reflection::unbox_for_regular_object(box, &value);
3363 } else {
3364 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3365 }
3366 Reflection::array_set(&value, a, index, value_type, CHECK);
3367 JVM_END
3368
3369
3370 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3371 arrayOop a = check_array(env, arr, true, CHECK);
3372 assert(a->is_typeArray(), "just checking");
3373 BasicType value_type = (BasicType) vCode;
3374 Reflection::array_set(&v, a, index, value_type, CHECK);
3375 JVM_END
3376
3377
3378 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3379 JvmtiVMObjectAllocEventCollector oam;
3380 oop element_mirror = JNIHandles::resolve(eltClass);
3381 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3382 return JNIHandles::make_local(THREAD, result);
3383 JVM_END
3384
3385
3386 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3387 JvmtiVMObjectAllocEventCollector oam;
3388 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3389 oop element_mirror = JNIHandles::resolve(eltClass);
3390 assert(dim_array->is_typeArray(), "just checking");
3391 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3392 return JNIHandles::make_local(THREAD, result);
3393 JVM_END
3394
3395
3396 // Library support ///////////////////////////////////////////////////////////////////////////
3397
3398 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3399 //%note jvm_ct
3400 char ebuf[1024];
3401 void *load_result;
3402 {
3403 ThreadToNativeFromVM ttnfvm(thread);
3404 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3405 }
3406 if (load_result == NULL) {
3407 char msg[1024];
3408 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3409 // Since 'ebuf' may contain a string encoded using
3410 // platform encoding scheme, we need to pass
3411 // Exceptions::unsafe_to_utf8 to the new_exception method
3412 // as the last argument. See bug 6367357.
3413 Handle h_exception =
3414 Exceptions::new_exception(thread,
3415 vmSymbols::java_lang_UnsatisfiedLinkError(),
3416 msg, Exceptions::unsafe_to_utf8);
3417
3418 THROW_HANDLE_0(h_exception);
3419 }
3420 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3421 return load_result;
3422 JVM_END
3423
3424
3425 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3426 os::dll_unload(handle);
3427 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3428 JVM_END
3429
3430
3431 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3432 void* find_result = os::dll_lookup(handle, name);
3433 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3434 find_result != NULL ? "Found" : "Failed to find",
3435 name, p2i(handle));
3436 return find_result;
3437 JVM_END
3438
3439
3440 // JNI version ///////////////////////////////////////////////////////////////////////////////
3441
3442 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3443 return Threads::is_supported_jni_version_including_1_1(version);
3444 JVM_END
3445
3446
3447 // String support ///////////////////////////////////////////////////////////////////////////
3448
3449 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3450 JvmtiVMObjectAllocEventCollector oam;
3451 if (str == NULL) return NULL;
3452 oop string = JNIHandles::resolve_non_null(str);
3453 oop result = StringTable::intern(string, CHECK_NULL);
3454 return (jstring) JNIHandles::make_local(THREAD, result);
3455 JVM_END
3456
3457
3458 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3459
3460 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3461 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3462 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3463 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3464 // nature. JavaThreads will be "in native" when using this API from JDK code.
3465
3466
3467 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3468 VM_Exit::block_if_vm_exited();
3469 return new os::PlatformMutex();
3470 }
3471
3472
3473 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3474 VM_Exit::block_if_vm_exited();
3475 delete ((os::PlatformMutex*) mon);
3476 }
3477
3478
3479 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3480 VM_Exit::block_if_vm_exited();
3481 ((os::PlatformMutex*) mon)->lock();
3482 return 0;
3483 }
3484
3485
3486 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3487 VM_Exit::block_if_vm_exited();
3488 ((os::PlatformMutex*) mon)->unlock();
3489 }
3490
3491
3492 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3493
3494 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3495 Handle loader, Handle protection_domain,
3496 jboolean throwError, TRAPS) {
3497 // Security Note:
3498 // The Java level wrapper will perform the necessary security check allowing
3499 // us to pass the NULL as the initiating class loader. The VM is responsible for
3500 // the checkPackageAccess relative to the initiating class loader via the
3501 // protection_domain. The protection_domain is passed as NULL by the java code
3502 // if there is no security manager in 3-arg Class.forName().
3503 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3504
3505 // Check if we should initialize the class
3506 if (init && klass->is_instance_klass()) {
3507 klass->initialize(CHECK_NULL);
3508 }
3509 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3510 }
3511
3512
3513 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3514
3515 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3516 Handle method_handle;
3517 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3518 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3519 Handle receiver(THREAD, JNIHandles::resolve(obj));
3520 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3521 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3522 jobject res = JNIHandles::make_local(THREAD, result);
3523 if (JvmtiExport::should_post_vm_object_alloc()) {
3524 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3525 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3526 if (java_lang_Class::is_primitive(ret_type)) {
3527 // Only for primitive type vm allocates memory for java object.
3528 // See box() method.
3529 JvmtiExport::post_vm_object_alloc(thread, result);
3530 }
3531 }
3532 return res;
3533 } else {
3534 THROW_0(vmSymbols::java_lang_StackOverflowError());
3535 }
3536 JVM_END
3537
3538
3539 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3540 oop constructor_mirror = JNIHandles::resolve(c);
3541 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3542 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3543 jobject res = JNIHandles::make_local(THREAD, result);
3544 if (JvmtiExport::should_post_vm_object_alloc()) {
3545 JvmtiExport::post_vm_object_alloc(thread, result);
3546 }
3547 return res;
3548 JVM_END
3549
3550 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3551
3552 JVM_LEAF(jboolean, JVM_SupportsCX8())
3553 return VM_Version::supports_cx8();
3554 JVM_END
3555
3556 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3557 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3558 assert(k->is_klass(), "just checking");
3559 HeapShared::initialize_from_archived_subgraph(k, THREAD);
3560 JVM_END
3561
3562 JVM_ENTRY(void, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3563 jclass caller,
3564 jstring interfaceMethodName,
3565 jobject factoryType,
3566 jobject interfaceMethodType,
3567 jobject implementationMember,
3568 jobject dynamicMethodType,
3569 jclass lambdaProxyClass))
3570 #if INCLUDE_CDS
3571 if (!Arguments::is_dumping_archive()) {
3572 return;
3573 }
3574
3575 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3576 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3577 if (caller_ik->is_hidden()) {
3578 // Hidden classes not of type lambda proxy classes are currently not being archived.
3579 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3580 // registered for archiving.
3581 return;
3582 }
3583 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass));
3584 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k);
3585 assert(lambda_ik->is_hidden(), "must be a hidden class");
3586 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3587
3588 Symbol* interface_method_name = NULL;
3589 if (interfaceMethodName != NULL) {
3590 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3591 }
3592 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3593 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3594
3595 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3596 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3597
3598 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3599 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3600 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3601
3602 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3603 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3604
3605 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3606 interface_method_type, m, dynamic_method_type, THREAD);
3607 #endif // INCLUDE_CDS
3608 JVM_END
3609
3610 JVM_ENTRY(jclass, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3611 jclass caller,
3612 jstring interfaceMethodName,
3613 jobject factoryType,
3614 jobject interfaceMethodType,
3615 jobject implementationMember,
3616 jobject dynamicMethodType))
3617 #if INCLUDE_CDS
3618
3619 if (interfaceMethodName == NULL || factoryType == NULL || interfaceMethodType == NULL ||
3620 implementationMember == NULL || dynamicMethodType == NULL) {
3621 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
3622 }
3623
3624 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3625 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3626 if (!caller_ik->is_shared()) {
3627 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3628 return NULL;
3629 }
3630
3631 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3632 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3633 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3634
3635 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3636 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3637
3638 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3639 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3640 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3641
3642 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3643 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3644
3645 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3646 interface_method_type, m, dynamic_method_type);
3647 jclass jcls = NULL;
3648 if (lambda_ik != NULL) {
3649 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3650 jcls = loaded_lambda == NULL ? NULL : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3651 }
3652 return jcls;
3653 #else
3654 return NULL;
3655 #endif // INCLUDE_CDS
3656 JVM_END
3657
3658 JVM_ENTRY(jboolean, JVM_IsCDSDumpingEnabled(JNIEnv* env))
3659 return Arguments::is_dumping_archive();
3660 JVM_END
3661
3662 JVM_ENTRY(jboolean, JVM_IsSharingEnabled(JNIEnv* env))
3663 return UseSharedSpaces;
3664 JVM_END
3665
3666 JVM_ENTRY_NO_ENV(jlong, JVM_GetRandomSeedForDumping())
3667 if (DumpSharedSpaces) {
3668 const char* release = Abstract_VM_Version::vm_release();
3669 const char* dbg_level = Abstract_VM_Version::jdk_debug_level();
3670 const char* version = VM_Version::internal_vm_info_string();
3671 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3672 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3673 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3674 seed += (jlong)Abstract_VM_Version::vm_major_version();
3675 seed += (jlong)Abstract_VM_Version::vm_minor_version();
3676 seed += (jlong)Abstract_VM_Version::vm_security_version();
3677 seed += (jlong)Abstract_VM_Version::vm_patch_version();
3678 if (seed == 0) { // don't let this ever be zero.
3679 seed = 0x87654321;
3680 }
3681 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3682 return seed;
3683 } else {
3684 return 0;
3685 }
3686 JVM_END
3687
3688 JVM_ENTRY(jboolean, JVM_IsDumpingClassList(JNIEnv *env))
3689 #if INCLUDE_CDS
3690 return ClassListWriter::is_enabled() || DynamicDumpSharedSpaces;
3691 #else
3692 return false;
3693 #endif // INCLUDE_CDS
3694 JVM_END
3695
3696 JVM_ENTRY(void, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3697 #if INCLUDE_CDS
3698 assert(ClassListWriter::is_enabled() || DynamicDumpSharedSpaces, "Should be set and open or do dynamic dump");
3699 if (line != NULL) {
3700 ResourceMark rm(THREAD);
3701 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3702 char* c_line = java_lang_String::as_utf8_string(h_line());
3703 if (DynamicDumpSharedSpaces) {
3704 // Note: LambdaFormInvokers::append_filtered and LambdaFormInvokers::append take same format which is not
3705 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3706 LambdaFormInvokers::append_filtered(os::strdup((const char*)c_line, mtInternal));
3707 }
3708 if (ClassListWriter::is_enabled()) {
3709 ClassListWriter w;
3710 w.stream()->print_cr("%s %s", LAMBDA_FORM_TAG, c_line);
3711 }
3712 }
3713 #endif // INCLUDE_CDS
3714 JVM_END
3715
3716 JVM_ENTRY(void, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3717 #if INCLUDE_CDS
3718 ResourceMark rm(THREAD);
3719 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3720 char* file_name = java_lang_String::as_utf8_string(file_handle());
3721 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3722 #endif // INCLUDE_CDS
3723 JVM_END
3724
3725 JVM_ENTRY(void, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3726 #if INCLUDE_CDS
3727 ResourceMark rm(THREAD);
3728 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3729 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3730 DynamicArchive::dump(archive_name, CHECK);
3731 #endif // INCLUDE_CDS
3732 JVM_END
3733
3734 // Returns an array of all live Thread objects (VM internal JavaThreads,
3735 // jvmti agent threads, and JNI attaching threads are skipped)
3736 // See CR 6404306 regarding JNI attaching threads
3737 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3738 ResourceMark rm(THREAD);
3739 ThreadsListEnumerator tle(THREAD, false, false);
3740 JvmtiVMObjectAllocEventCollector oam;
3741
3742 int num_threads = tle.num_threads();
3743 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3744 objArrayHandle threads_ah(THREAD, r);
3745
3746 for (int i = 0; i < num_threads; i++) {
3747 Handle h = tle.get_threadObj(i);
3748 threads_ah->obj_at_put(i, h());
3749 }
3750
3751 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3752 JVM_END
3753
3754
3755 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3756 // Return StackTraceElement[][], each element is the stack trace of a thread in
3757 // the corresponding entry in the given threads array
3758 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3759 JvmtiVMObjectAllocEventCollector oam;
3760
3761 // Check if threads is null
3762 if (threads == NULL) {
3763 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3764 }
3765
3766 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3767 objArrayHandle ah(THREAD, a);
3768 int num_threads = ah->length();
3769 // check if threads is non-empty array
3770 if (num_threads == 0) {
3771 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3772 }
3773
3774 // check if threads is not an array of objects of Thread class
3775 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3776 if (k != vmClasses::Thread_klass()) {
3777 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3778 }
3779
3780 ResourceMark rm(THREAD);
3781
3782 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3783 for (int i = 0; i < num_threads; i++) {
3784 oop thread_obj = ah->obj_at(i);
3785 instanceHandle h(THREAD, (instanceOop) thread_obj);
3786 thread_handle_array->append(h);
3787 }
3788
3789 // The JavaThread references in thread_handle_array are validated
3790 // in VM_ThreadDump::doit().
3791 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3792 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3793
3794 JVM_END
3795
3796 // JVM monitoring and management support
3797 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3798 return Management::get_jmm_interface(version);
3799 JVM_END
3800
3801 // com.sun.tools.attach.VirtualMachine agent properties support
3802 //
3803 // Initialize the agent properties with the properties maintained in the VM
3804 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3805 ResourceMark rm;
3806
3807 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3808
3809 PUTPROP(props, "sun.java.command", Arguments::java_command());
3810 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3811 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3812 return properties;
3813 JVM_END
3814
3815 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3816 {
3817 JvmtiVMObjectAllocEventCollector oam;
3818
3819 if (ofClass == NULL) {
3820 return NULL;
3821 }
3822 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3823 // Special handling for primitive objects
3824 if (java_lang_Class::is_primitive(mirror())) {
3825 return NULL;
3826 }
3827 Klass* k = java_lang_Class::as_Klass(mirror());
3828 if (!k->is_instance_klass()) {
3829 return NULL;
3830 }
3831 InstanceKlass* ik = InstanceKlass::cast(k);
3832 int encl_method_class_idx = ik->enclosing_method_class_index();
3833 if (encl_method_class_idx == 0) {
3834 return NULL;
3835 }
3836 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3837 objArrayHandle dest(THREAD, dest_o);
3838 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3839 dest->obj_at_put(0, enc_k->java_mirror());
3840 int encl_method_method_idx = ik->enclosing_method_method_index();
3841 if (encl_method_method_idx != 0) {
3842 Symbol* sym = ik->constants()->symbol_at(
3843 extract_low_short_from_int(
3844 ik->constants()->name_and_type_at(encl_method_method_idx)));
3845 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3846 dest->obj_at_put(1, str());
3847 sym = ik->constants()->symbol_at(
3848 extract_high_short_from_int(
3849 ik->constants()->name_and_type_at(encl_method_method_idx)));
3850 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3851 dest->obj_at_put(2, str());
3852 }
3853 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3854 }
3855 JVM_END
3856
3857 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3858 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3859 ResourceMark rm(THREAD);
3860
3861 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3862 return NULL;
3863 }
3864
3865 char** vm_flags = Arguments::jvm_flags_array();
3866 char** vm_args = Arguments::jvm_args_array();
3867 int num_flags = Arguments::num_jvm_flags();
3868 int num_args = Arguments::num_jvm_args();
3869
3870 InstanceKlass* ik = vmClasses::String_klass();
3871 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3872 objArrayHandle result_h(THREAD, r);
3873
3874 int index = 0;
3875 for (int j = 0; j < num_flags; j++, index++) {
3876 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3877 result_h->obj_at_put(index, h());
3878 }
3879 for (int i = 0; i < num_args; i++, index++) {
3880 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3881 result_h->obj_at_put(index, h());
3882 }
3883 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3884 JVM_END
3885
3886 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3887 return os::get_signal_number(name);
3888 JVM_END
3889
3890 JVM_ENTRY(void, JVM_VirtualThreadMountBegin(JNIEnv* env, jobject vthread, jboolean first_mount))
3891 #if INCLUDE_JVMTI
3892 JvmtiVTMTDisabler::start_VTMT(vthread, 0);
3893 #else
3894 fatal("Should only be called with JVMTI enabled");
3895 #endif
3896 JVM_END
3897
3898 JVM_ENTRY(void, JVM_VirtualThreadMountEnd(JNIEnv* env, jobject vthread, jboolean first_mount))
3899 #if INCLUDE_JVMTI
3900 oop vt = JNIHandles::resolve(vthread);
3901
3902 thread->rebind_to_jvmti_thread_state_of(vt);
3903
3904 assert(thread->is_in_VTMT(), "VTMT sanity check");
3905 JvmtiVTMTDisabler::finish_VTMT(vthread, 0);
3906
3907 if (first_mount) {
3908 // thread start
3909 if (JvmtiExport::can_support_virtual_threads()) {
3910 if (JvmtiExport::should_post_vthread_start()) {
3911 JvmtiExport::post_vthread_start(vthread);
3912 }
3913 } else { // compatibility for vthread unaware agents: legacy thread_start
3914 if (JvmtiExport::should_post_thread_life()) {
3915 JvmtiExport::post_thread_start(thread);
3916 }
3917 }
3918 }
3919 if (JvmtiExport::should_post_vthread_mount()) {
3920 JvmtiExport::post_vthread_mount(vthread);
3921 }
3922 #else
3923 fatal("Should only be called with JVMTI enabled");
3924 #endif
3925 JVM_END
3926
3927 JVM_ENTRY(void, JVM_VirtualThreadUnmountBegin(JNIEnv* env, jobject vthread, jboolean last_unmount))
3928 #if INCLUDE_JVMTI
3929 HandleMark hm(thread);
3930 Handle ct(thread, thread->threadObj());
3931
3932 if (JvmtiExport::should_post_vthread_unmount()) {
3933 JvmtiExport::post_vthread_unmount(vthread);
3934 }
3935 if (last_unmount) {
3936 if (JvmtiExport::can_support_virtual_threads()) {
3937 if (JvmtiExport::should_post_vthread_end()) {
3938 JvmtiExport::post_vthread_end(vthread);
3939 }
3940 } else { // compatibility for vthread unaware agents: legacy thread_end
3941 if (JvmtiExport::should_post_thread_life()) {
3942 JvmtiExport::post_thread_end(thread);
3943 }
3944 }
3945 thread->set_mounted_vthread(NULL);
3946 }
3947
3948 assert(!thread->is_in_VTMT(), "VTMT sanity check");
3949 JvmtiVTMTDisabler::start_VTMT(vthread, 1);
3950 thread->rebind_to_jvmti_thread_state_of(ct());
3951 #else
3952 fatal("Should only be called with JVMTI enabled");
3953 #endif
3954 JVM_END
3955
3956 JVM_ENTRY(void, JVM_VirtualThreadUnmountEnd(JNIEnv* env, jobject vthread, jboolean last_unmount))
3957 #if INCLUDE_JVMTI
3958 assert(thread->is_in_VTMT(), "VTMT sanity check");
3959 JvmtiVTMTDisabler::finish_VTMT(vthread, 1);
3960 #else
3961 fatal("Should only be called with JVMTI enabled");
3962 #endif
3963 JVM_END