1 /*
2 * Copyright (c) 1997, 2025, 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 "cds/aotClassInitializer.hpp"
26 #include "cds/aotConstantPoolResolver.hpp"
27 #include "cds/aotMetaspace.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/classListParser.hpp"
30 #include "cds/classListWriter.hpp"
31 #include "cds/dynamicArchive.hpp"
32 #include "cds/heapShared.hpp"
33 #include "cds/lambdaFormInvokers.hpp"
34 #include "cds/lambdaProxyClassDictionary.hpp"
35 #include "classfile/classFileStream.hpp"
36 #include "classfile/classLoader.inline.hpp"
37 #include "classfile/classLoaderData.inline.hpp"
38 #include "classfile/classLoadInfo.hpp"
39 #include "classfile/javaAssertions.hpp"
40 #include "classfile/javaClasses.inline.hpp"
41 #include "classfile/moduleEntry.hpp"
42 #include "classfile/modules.hpp"
43 #include "classfile/packageEntry.hpp"
44 #include "classfile/stringTable.hpp"
45 #include "classfile/symbolTable.hpp"
46 #include "classfile/systemDictionary.hpp"
47 #include "classfile/vmClasses.hpp"
48 #include "classfile/vmSymbols.hpp"
49 #include "gc/shared/collectedHeap.inline.hpp"
50 #include "interpreter/bytecode.hpp"
51 #include "interpreter/bytecodeUtils.hpp"
52 #include "jfr/jfrEvents.hpp"
53 #include "jvm.h"
54 #include "logging/log.hpp"
55 #include "memory/oopFactory.hpp"
56 #include "memory/referenceType.hpp"
57 #include "memory/resourceArea.hpp"
58 #include "memory/universe.hpp"
59 #include "oops/access.inline.hpp"
60 #include "oops/constantPool.hpp"
61 #include "oops/fieldStreams.inline.hpp"
62 #include "oops/instanceKlass.hpp"
63 #include "oops/klass.inline.hpp"
64 #include "oops/method.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/recordComponent.hpp"
69 #include "prims/foreignGlobals.hpp"
70 #include "prims/jvm_misc.hpp"
71 #include "prims/jvmtiExport.hpp"
72 #include "prims/jvmtiThreadState.inline.hpp"
73 #include "prims/stackwalk.hpp"
74 #include "runtime/arguments.hpp"
75 #include "runtime/atomic.hpp"
76 #include "runtime/continuation.hpp"
77 #include "runtime/deoptimization.hpp"
78 #include "runtime/globals_extension.hpp"
79 #include "runtime/handles.inline.hpp"
80 #include "runtime/handshake.hpp"
81 #include "runtime/init.hpp"
82 #include "runtime/interfaceSupport.inline.hpp"
83 #include "runtime/java.hpp"
84 #include "runtime/javaCalls.hpp"
85 #include "runtime/javaThread.hpp"
86 #include "runtime/jfieldIDWorkaround.hpp"
87 #include "runtime/jniHandles.inline.hpp"
88 #include "runtime/os.inline.hpp"
89 #include "runtime/osThread.hpp"
90 #include "runtime/perfData.inline.hpp"
91 #include "runtime/reflection.hpp"
92 #include "runtime/synchronizer.hpp"
93 #include "runtime/threadIdentifier.hpp"
94 #include "runtime/threadSMR.hpp"
95 #include "runtime/vframe.inline.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "runtime/vmOperations.hpp"
98 #include "services/attachListener.hpp"
99 #include "services/management.hpp"
100 #include "services/threadService.hpp"
101 #include "utilities/checkedCast.hpp"
102 #include "utilities/copy.hpp"
103 #include "utilities/defaultStream.hpp"
104 #include "utilities/dtrace.hpp"
105 #include "utilities/events.hpp"
106 #include "utilities/macros.hpp"
107 #include "utilities/utf8.hpp"
108 #include "utilities/zipLibrary.hpp"
109 #if INCLUDE_CDS
110 #include "classfile/systemDictionaryShared.hpp"
111 #endif
112 #if INCLUDE_JFR
113 #include "jfr/jfr.hpp"
114 #endif
115 #if INCLUDE_MANAGEMENT
116 #include "services/finalizerService.hpp"
117 #endif
118 #ifdef LINUX
119 #include "osContainer_linux.hpp"
120 #endif
121
122 #include <errno.h>
123
124 /*
125 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
126 such ctors and calls MUST NOT come between an oop declaration/init and its
127 usage because if objects are move this may cause various memory stomps, bus
128 errors and segfaults. Here is a cookbook for causing so called "naked oop
129 failures":
130
131 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
132 // Object address to be held directly in mirror & not visible to GC
133 oop mirror = JNIHandles::resolve_non_null(ofClass);
134
135 // If this ctor can hit a safepoint, moving objects around, then
136 ComplexConstructor foo;
137
138 // Boom! mirror may point to JUNK instead of the intended object
139 (some dereference of mirror)
140
141 // Here's another call that may block for GC, making mirror stale
142 MutexLocker ml(some_lock);
143
144 // And here's an initializer that can result in a stale oop
145 // all in one step.
146 oop o = call_that_can_throw_exception(TRAPS);
147
148
149 The solution is to keep the oop declaration BELOW the ctor or function
150 call that might cause a GC, do another resolve to reassign the oop, or
151 consider use of a Handle instead of an oop so there is immunity from object
152 motion. But note that the "QUICK" entries below do not have a handlemark
153 and thus can only support use of handles passed in.
154 */
155
156 extern void trace_class_resolution(Klass* to_class) {
157 ResourceMark rm;
158 int line_number = -1;
159 const char * source_file = nullptr;
160 const char * trace = "explicit";
161 InstanceKlass* caller = nullptr;
162 JavaThread* jthread = JavaThread::current();
163 if (jthread->has_last_Java_frame()) {
164 vframeStream vfst(jthread);
165
166 // Scan up the stack skipping ClassLoader frames.
167 Method* last_caller = nullptr;
168
169 while (!vfst.at_end()) {
170 Method* m = vfst.method();
171 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())) {
172 break;
173 }
174 last_caller = m;
175 vfst.next();
176 }
177 // if this is called from Class.forName0 and that is called from Class.forName,
178 // then print the caller of Class.forName. If this is Class.loadClass, then print
179 // that caller, otherwise keep quiet since this should be picked up elsewhere.
180 bool found_it = false;
181 if (!vfst.at_end() &&
182 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
183 vfst.method()->name() == vmSymbols::forName0_name()) {
184 vfst.next();
185 if (!vfst.at_end() &&
186 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
187 vfst.method()->name() == vmSymbols::forName_name()) {
188 vfst.next();
189 found_it = true;
190 }
191 } else if (last_caller != nullptr &&
192 last_caller->method_holder()->name() ==
193 vmSymbols::java_lang_ClassLoader() &&
194 last_caller->name() == vmSymbols::loadClass_name()) {
195 found_it = true;
196 } else if (!vfst.at_end()) {
197 if (vfst.method()->is_native()) {
198 // JNI call
199 found_it = true;
200 }
201 }
202 if (found_it && !vfst.at_end()) {
203 // found the caller
204 caller = vfst.method()->method_holder();
205 line_number = vfst.method()->line_number_from_bci(vfst.bci());
206 if (line_number == -1) {
207 // show method name if it's a native method
208 trace = vfst.method()->name_and_sig_as_C_string();
209 }
210 Symbol* s = caller->source_file_name();
211 if (s != nullptr) {
212 source_file = s->as_C_string();
213 }
214 }
215 }
216 if (caller != nullptr) {
217 if (to_class != caller) {
218 const char * from = caller->external_name();
219 const char * to = to_class->external_name();
220 // print in a single call to reduce interleaving between threads
221 if (source_file != nullptr) {
222 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
223 } else {
224 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
225 }
226 }
227 }
228 }
229
230 // java.lang.System //////////////////////////////////////////////////////////////////////
231
232
233 JVM_LEAF_PROF(jboolean, JVM_AOTIsTraining, JVM_AOTIsTraining(JNIEnv *env))
234 #if INCLUDE_CDS
235 return AOTMetaspace::is_recording_preimage_static_archive();
236 #else
237 return JNI_FALSE;
238 #endif // INCLUDE_CDS
239 JVM_END
240
241 JVM_ENTRY_PROF(jboolean, JVM_AOTEndTraining, JVM_AOTEndTraining(JNIEnv *env))
242 #if INCLUDE_CDS
243 if (AOTMetaspace::is_recording_preimage_static_archive()) {
244 AOTMetaspace::preload_and_dump(THREAD);
245 return JNI_TRUE;
246 }
247 return JNI_FALSE;
248 #else
249 return JNI_FALSE;
250 #endif // INCLUDE_CDS
251 JVM_END
252
253 JVM_ENTRY_PROF(jstring, JVM_AOTGetMode, JVM_AOTGetMode(JNIEnv *env))
254 HandleMark hm(THREAD);
255 #if INCLUDE_CDS
256 const char* mode = AOTMode == nullptr ? "auto" : AOTMode;
257 Handle h = java_lang_String::create_from_platform_dependent_str(mode, CHECK_NULL);
258 return (jstring) JNIHandles::make_local(THREAD, h());
259 #else
260 return nullptr;
261 #endif // INCLUDE_CDS
262 JVM_END
263
264 JVM_LEAF_PROF(jlong, JVM_AOTGetRecordingDuration, JVM_AOTGetRecordingDuration(JNIEnv *env))
265 #if INCLUDE_CDS
266 return AOTMetaspace::get_preimage_static_archive_recording_duration();
267 #else
268 return 0;
269 #endif // INCLUDE_CDS
270 JVM_END
271
272 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
273 return os::javaTimeMillis();
274 JVM_END
275
276 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
277 return os::javaTimeNanos();
278 JVM_END
279
280 // The function below is actually exposed by jdk.internal.misc.VM and not
281 // java.lang.System, but we choose to keep it here so that it stays next
282 // to JVM_CurrentTimeMillis and JVM_NanoTime
283
284 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
285 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
286
287 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
288 jlong seconds;
289 jlong nanos;
290
291 os::javaTimeSystemUTC(seconds, nanos);
292
293 // We're going to verify that the result can fit in a long.
294 // For that we need the difference in seconds between 'seconds'
295 // and 'offset_secs' to be such that:
296 // |seconds - offset_secs| < (2^63/10^9)
297 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
298 // which makes |seconds - offset_secs| < 2^33
299 // and we will prefer +/- 2^32 as the maximum acceptable diff
300 // as 2^32 has a more natural feel than 2^33...
301 //
302 // So if |seconds - offset_secs| >= 2^32 - we return a special
303 // sentinel value (-1) which the caller should take as an
304 // exception value indicating that the offset given to us is
305 // too far from range of the current time - leading to too big
306 // a nano adjustment. The caller is expected to recover by
307 // computing a more accurate offset and calling this method
308 // again. (For the record 2^32 secs is ~136 years, so that
309 // should rarely happen)
310 //
311 jlong diff = seconds - offset_secs;
312 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
313 return -1; // sentinel value: the offset is too far off the target
314 }
315
316 // return the adjustment. If you compute a time by adding
317 // this number of nanoseconds along with the number of seconds
318 // in the offset you should get the current UTC time.
319 return (diff * (jlong)1000000000) + nanos;
320 JVM_END
321
322 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
323 jobject dst, jint dst_pos, jint length))
324 // Check if we have null pointers
325 if (src == nullptr || dst == nullptr) {
326 THROW(vmSymbols::java_lang_NullPointerException());
327 }
328 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
329 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
330 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
331 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
332 // Do copy
333 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
334 JVM_END
335
336
337 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
338 JavaValue r(T_OBJECT);
339 // public synchronized Object put(Object key, Object value);
340 HandleMark hm(THREAD);
341 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
342 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
343 JavaCalls::call_virtual(&r,
344 props,
345 vmClasses::Properties_klass(),
346 vmSymbols::put_name(),
347 vmSymbols::object_object_object_signature(),
348 key_str,
349 value_str,
350 THREAD);
351 }
352
353
354 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
355
356 /*
357 * Return all of the system properties in a Java String array with alternating
358 * names and values from the jvm SystemProperty.
359 * Which includes some internal and all commandline -D defined properties.
360 */
361 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
362 ResourceMark rm(THREAD);
363 HandleMark hm(THREAD);
364 int ndx = 0;
365 int fixedCount = 2;
366
367 SystemProperty* p = Arguments::system_properties();
368 int count = Arguments::PropertyList_count(p);
369
370 // Allocate result String array
371 InstanceKlass* ik = vmClasses::String_klass();
372 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
373 objArrayHandle result_h(THREAD, r);
374
375 while (p != nullptr) {
376 const char * key = p->key();
377 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
378 const char * value = p->value();
379 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
380 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
381 result_h->obj_at_put(ndx * 2, key_str());
382 result_h->obj_at_put(ndx * 2 + 1, value_str());
383 ndx++;
384 }
385 p = p->next();
386 }
387
388 // Convert the -XX:MaxDirectMemorySize= command line flag
389 // to the sun.nio.MaxDirectMemorySize property.
390 // Do this after setting user properties to prevent people
391 // from setting the value with a -D option, as requested.
392 // Leave empty if not supplied
393 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
394 char as_chars[256];
395 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
396 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
397 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
398 result_h->obj_at_put(ndx * 2, key_str());
399 result_h->obj_at_put(ndx * 2 + 1, value_str());
400 ndx++;
401 }
402
403 // JVM monitoring and management support
404 // Add the sun.management.compiler property for the compiler's name
405 {
406 #undef CSIZE
407 #if defined(_LP64)
408 #define CSIZE "64-Bit "
409 #else
410 #define CSIZE
411 #endif // 64bit
412
413 #if COMPILER1_AND_COMPILER2
414 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
415 #else
416 #if defined(COMPILER1)
417 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
418 #elif defined(COMPILER2)
419 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
420 #elif INCLUDE_JVMCI
421 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
422 #else
423 const char* compiler_name = "";
424 #endif // compilers
425 #endif // COMPILER1_AND_COMPILER2
426
427 if (*compiler_name != '\0' &&
428 (Arguments::mode() != Arguments::_int)) {
429 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
430 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
431 result_h->obj_at_put(ndx * 2, key_str());
432 result_h->obj_at_put(ndx * 2 + 1, value_str());
433 ndx++;
434 }
435 }
436
437 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
438 JVM_END
439
440
441 /*
442 * Return the temporary directory that the VM uses for the attach
443 * and perf data files.
444 *
445 * It is important that this directory is well-known and the
446 * same for all VM instances. It cannot be affected by configuration
447 * variables such as java.io.tmpdir.
448 */
449 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
450 HandleMark hm(THREAD);
451 const char* temp_dir = os::get_temp_directory();
452 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
453 return (jstring) JNIHandles::make_local(THREAD, h());
454 JVM_END
455
456
457 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
458
459 extern volatile jint vm_created;
460
461 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
462 EventShutdown event;
463 if (event.should_commit()) {
464 event.set_reason("Shutdown requested from Java");
465 event.commit();
466 }
467 JVM_END
468
469
470 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
471 before_exit(thread, true);
472 vm_exit(code);
473 JVM_END
474
475
476 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
477 if (!DisableExplicitGC) {
478 EventSystemGC event;
479 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
480 Universe::heap()->collect(GCCause::_java_lang_system_gc);
481 event.commit();
482 }
483 JVM_END
484
485
486 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
487 return Universe::heap()->millis_since_last_whole_heap_examined();
488 JVM_END
489
490
491 static inline jlong convert_size_t_to_jlong(size_t val) {
492 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
493 NOT_LP64 (return (jlong)val;)
494 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
495 }
496
497 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
498 size_t n = Universe::heap()->capacity();
499 return convert_size_t_to_jlong(n);
500 JVM_END
501
502
503 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
504 size_t n = Universe::heap()->unused();
505 return convert_size_t_to_jlong(n);
506 JVM_END
507
508
509 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
510 size_t n = Universe::heap()->max_capacity();
511 return convert_size_t_to_jlong(n);
512 JVM_END
513
514
515 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
516 return os::active_processor_count();
517 JVM_END
518
519 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
520 #ifdef LINUX
521 if (UseContainerSupport) {
522 return JNI_TRUE;
523 }
524 #endif
525 return JNI_FALSE;
526 JVM_END
527
528 JVM_LEAF(jboolean, JVM_IsContainerized(void))
529 #ifdef LINUX
530 if (OSContainer::is_containerized()) {
531 return JNI_TRUE;
532 }
533 #endif
534 return JNI_FALSE;
535 JVM_END
536
537 // java.lang.Throwable //////////////////////////////////////////////////////
538
539 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
540 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
541 java_lang_Throwable::fill_in_stack_trace(exception);
542 JVM_END
543
544 // java.lang.NullPointerException ///////////////////////////////////////////
545
546 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
547 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
548
549 oop exc = JNIHandles::resolve_non_null(throwable);
550
551 Method* method;
552 int bci;
553 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
554 return nullptr;
555 }
556 if (method->is_native()) {
557 return nullptr;
558 }
559
560 stringStream ss;
561 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
562 if (ok) {
563 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
564 return (jstring) JNIHandles::make_local(THREAD, result);
565 } else {
566 return nullptr;
567 }
568 JVM_END
569
570 // java.lang.StackTraceElement //////////////////////////////////////////////
571
572
573 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
574 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
575 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
576 objArrayHandle stack_trace(THREAD, st);
577 // Fill in the allocated stack trace
578 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
579 JVM_END
580
581
582 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
583 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
584 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
585 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
586 JVM_END
587
588
589 // java.lang.StackWalker //////////////////////////////////////////////////////
590 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
591 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
592
593 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
594 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
595 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
596 if (!have_name) {
597 oop name = StringTable::intern(method->name(), CHECK);
598 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
599 }
600 if (!have_type) {
601 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
602 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
603 }
604 JVM_END
605
606 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
607 jint skip_frames, jobject contScope, jobject cont,
608 jint buffer_size, jint start_index, jobjectArray frames))
609 if (!thread->has_last_Java_frame()) {
610 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
611 }
612
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
615 Handle cont_h(THREAD, JNIHandles::resolve(cont));
616 // frames array is a ClassFrameInfo[] array when only getting caller reference,
617 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
618 // be null.
619 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
620 objArrayHandle frames_array_h(THREAD, fa);
621
622 if (frames_array_h->length() < buffer_size) {
623 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
624 }
625
626 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
627 buffer_size, start_index, frames_array_h, CHECK_NULL);
628 return JNIHandles::make_local(THREAD, result);
629 JVM_END
630
631
632 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
633 jint last_batch_count, jint buffer_size, jint start_index,
634 jobjectArray frames))
635 // frames array is a ClassFrameInfo[] array when only getting caller reference,
636 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
637 // be null.
638 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
639 objArrayHandle frames_array_h(THREAD, fa);
640
641 if (frames_array_h->length() < buffer_size) {
642 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
643 }
644
645 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
646 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
647 start_index, frames_array_h, THREAD);
648 JVM_END
649
650 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
651 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
652 objArrayHandle frames_array_h(THREAD, fa);
653 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
654 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
655
656 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
657 JVM_END
658
659 // java.lang.Object ///////////////////////////////////////////////
660
661
662 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
663 // as implemented in the classic virtual machine; return 0 if object is null
664 return handle == nullptr ? 0 :
665 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
666 JVM_END
667
668
669 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
670 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
671 ObjectSynchronizer::wait(obj, ms, CHECK);
672 JVM_END
673
674
675 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
676 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
677 ObjectSynchronizer::notify(obj, CHECK);
678 JVM_END
679
680
681 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
682 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
683 ObjectSynchronizer::notifyall(obj, CHECK);
684 JVM_END
685
686
687 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
688 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
689 Klass* klass = obj->klass();
690 JvmtiVMObjectAllocEventCollector oam;
691
692 #ifdef ASSERT
693 // Just checking that the cloneable flag is set correct
694 if (obj->is_array()) {
695 guarantee(klass->is_cloneable(), "all arrays are cloneable");
696 } else {
697 guarantee(obj->is_instance(), "should be instanceOop");
698 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
699 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
700 }
701 #endif
702
703 // Check if class of obj supports the Cloneable interface.
704 // All arrays are considered to be cloneable (See JLS 20.1.5).
705 // All j.l.r.Reference classes are considered non-cloneable.
706 if (!klass->is_cloneable() ||
707 (klass->is_instance_klass() &&
708 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
709 ResourceMark rm(THREAD);
710 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
711 }
712
713 // Make shallow object copy
714 const size_t size = obj->size();
715 oop new_obj_oop = nullptr;
716 if (obj->is_array()) {
717 const int length = ((arrayOop)obj())->length();
718 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
719 /* do_zero */ true, CHECK_NULL);
720 } else {
721 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
722 }
723
724 HeapAccess<>::clone(obj(), new_obj_oop, size);
725
726 Handle new_obj(THREAD, new_obj_oop);
727 // Caution: this involves a java upcall, so the clone should be
728 // "gc-robust" by this stage.
729 if (klass->has_finalizer()) {
730 assert(obj->is_instance(), "should be instanceOop");
731 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
732 new_obj = Handle(THREAD, new_obj_oop);
733 }
734
735 return JNIHandles::make_local(THREAD, new_obj());
736 JVM_END
737
738 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
739
740 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
741 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
742 JVM_END
743
744 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
745 return InstanceKlass::is_finalization_enabled();
746 JVM_END
747
748 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
749
750 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
751 CONT_RegisterNativeMethods(env, cls);
752 JVM_END
753
754 // java.io.File ///////////////////////////////////////////////////////////////
755
756 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
757 return os::native_path(path);
758 JVM_END
759
760
761 // Misc. class handling ///////////////////////////////////////////////////////////
762
763
764 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
765 // Getting the class of the caller frame.
766 //
767 // The call stack at this point looks something like this:
768 //
769 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
770 // [1] [ @CallerSensitive API.method ]
771 // [.] [ (skipped intermediate frames) ]
772 // [n] [ caller ]
773 vframeStream vfst(thread);
774 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
775 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
776 Method* m = vfst.method();
777 assert(m != nullptr, "sanity");
778 switch (n) {
779 case 0:
780 // This must only be called from Reflection.getCallerClass
781 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
782 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
783 }
784 // fall-through
785 case 1:
786 // Frame 0 and 1 must be caller sensitive.
787 if (!m->caller_sensitive()) {
788 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
789 }
790 break;
791 default:
792 if (!m->is_ignored_by_security_stack_walk()) {
793 // We have reached the desired frame; return the holder class.
794 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
795 }
796 break;
797 }
798 }
799 return nullptr;
800 JVM_END
801
802
803 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
804 oop mirror = nullptr;
805 BasicType t = name2type(utf);
806 if (t != T_ILLEGAL && !is_reference_type(t)) {
807 mirror = Universe::java_mirror(t);
808 }
809 if (mirror == nullptr) {
810 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
811 } else {
812 return (jclass) JNIHandles::make_local(THREAD, mirror);
813 }
814 JVM_END
815
816
817 // Returns a class loaded by the bootstrap class loader; or null
818 // if not found. ClassNotFoundException is not thrown.
819 // FindClassFromBootLoader is exported to the launcher for windows.
820 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
821 // Java libraries should ensure that name is never null or illegal.
822 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
823 // It's impossible to create this class; the name cannot fit
824 // into the constant pool.
825 return nullptr;
826 }
827 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
828
829 TempNewSymbol h_name = SymbolTable::new_symbol(name);
830 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
831 if (k == nullptr) {
832 return nullptr;
833 }
834
835 if (log_is_enabled(Debug, class, resolve)) {
836 trace_class_resolution(k);
837 }
838 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
839 JVM_END
840
841 // Find a class with this name in this loader, using the caller's protection domain.
842 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
843 jboolean init, jobject loader,
844 jclass caller))
845 TempNewSymbol h_name =
846 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
847 CHECK_NULL);
848
849 oop loader_oop = JNIHandles::resolve(loader);
850 oop from_class = JNIHandles::resolve(caller);
851 Handle h_loader(THREAD, loader_oop);
852
853 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
854 false, THREAD);
855
856 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
857 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
858 }
859 return result;
860 JVM_END
861
862 // Currently only called from the old verifier.
863 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
864 jboolean init, jclass from))
865 TempNewSymbol h_name =
866 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
867 CHECK_NULL);
868 oop from_class_oop = JNIHandles::resolve(from);
869 Klass* from_class = (from_class_oop == nullptr)
870 ? (Klass*)nullptr
871 : java_lang_Class::as_Klass(from_class_oop);
872 oop class_loader = nullptr;
873 if (from_class != nullptr) {
874 class_loader = from_class->class_loader();
875 }
876 Handle h_loader(THREAD, class_loader);
877 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
878
879 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
880 // this function is generally only used for class loading during verification.
881 ResourceMark rm;
882 oop from_mirror = JNIHandles::resolve_non_null(from);
883 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
884 const char * from_name = from_class->external_name();
885
886 oop mirror = JNIHandles::resolve_non_null(result);
887 Klass* to_class = java_lang_Class::as_Klass(mirror);
888 const char * to = to_class->external_name();
889 log_debug(class, resolve)("%s %s (verification)", from_name, to);
890 }
891
892 return result;
893 JVM_END
894
895 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
896 static jclass jvm_define_class_common(const char *name,
897 jobject loader, const jbyte *buf,
898 jsize len, jobject pd, const char *source,
899 TRAPS) {
900 if (source == nullptr) source = "__JVM_DefineClass__";
901
902 JavaThread* jt = THREAD;
903
904 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
905 ClassLoader::perf_define_appclass_selftime(),
906 ClassLoader::perf_define_appclasses(),
907 jt->get_thread_stat()->perf_recursion_counts_addr(),
908 jt->get_thread_stat()->perf_timers_addr(),
909 PerfClassTraceTime::DEFINE_CLASS);
910
911 if (UsePerfData) {
912 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
913 }
914
915 // Class resolution will get the class name from the .class stream if the name is null.
916 TempNewSymbol class_name = name == nullptr ? nullptr :
917 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
918 CHECK_NULL);
919
920 ResourceMark rm(THREAD);
921 ClassFileStream st((u1*)buf, len, source);
922 Handle class_loader (THREAD, JNIHandles::resolve(loader));
923 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
924 ClassLoadInfo cl_info(protection_domain);
925 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
926 class_loader,
927 cl_info,
928 CHECK_NULL);
929
930 if (log_is_enabled(Debug, class, resolve)) {
931 trace_class_resolution(k);
932 }
933
934 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
935 }
936
937 enum {
938 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
939 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
940 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
941 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
942 };
943
944 /*
945 * Define a class with the specified flags that indicates if it's a nestmate,
946 * hidden, or strongly referenced from class loader.
947 */
948 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
949 const jbyte *buf, jsize len, jobject pd,
950 jboolean init, int flags, jobject classData, TRAPS) {
951 ResourceMark rm(THREAD);
952
953 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup));
954 // Lookup class must be a non-null instance
955 if (lookup_k == nullptr) {
956 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
957 }
958 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass");
959
960 Handle class_loader (THREAD, lookup_k->class_loader());
961
962 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
963 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
964 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
965 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
966
967 InstanceKlass* host_class = nullptr;
968 if (is_nestmate) {
969 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL);
970 }
971
972 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
973 name,
974 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
975 is_nestmate ? host_class->external_name() : "",
976 is_hidden ? "hidden" : "not hidden",
977 is_strong ? "strong" : "weak",
978 vm_annotations ? "with vm annotations" : "without vm annotation");
979
980 if (!is_hidden) {
981 // classData is only applicable for hidden classes
982 if (classData != nullptr) {
983 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
984 }
985 if (is_nestmate) {
986 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
987 }
988 if (!is_strong) {
989 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
990 }
991 if (vm_annotations) {
992 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
993 }
994 if (flags != STRONG_LOADER_LINK) {
995 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
996 err_msg("invalid flag 0x%x", flags));
997 }
998 }
999
1000 // Class resolution will get the class name from the .class stream if the name is null.
1001 TempNewSymbol class_name = name == nullptr ? nullptr :
1002 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
1003 CHECK_NULL);
1004
1005 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1006 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
1007 ClassFileStream st((u1*)buf, len, source);
1008
1009 InstanceKlass* ik = nullptr;
1010 if (!is_hidden) {
1011 ClassLoadInfo cl_info(protection_domain);
1012 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1013 class_loader,
1014 cl_info,
1015 CHECK_NULL);
1016
1017 if (log_is_enabled(Debug, class, resolve)) {
1018 trace_class_resolution(ik);
1019 }
1020 } else { // hidden
1021 Handle classData_h(THREAD, JNIHandles::resolve(classData));
1022 ClassLoadInfo cl_info(protection_domain,
1023 host_class,
1024 classData_h,
1025 is_hidden,
1026 is_strong,
1027 vm_annotations);
1028 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1029 class_loader,
1030 cl_info,
1031 CHECK_NULL);
1032
1033 // The hidden class loader data has been artificially been kept alive to
1034 // this point. The mirror and any instances of this class have to keep
1035 // it alive afterwards.
1036 ik->class_loader_data()->dec_keep_alive_ref_count();
1037
1038 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1039 ModuleEntry* module = ik->module();
1040 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1041 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1042 module_name,
1043 ik->external_name(),
1044 host_class->external_name(),
1045 ik->is_hidden() ? "is hidden" : "is not hidden");
1046 }
1047 }
1048
1049 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1050 // non-hidden class or nestmate class must be in the same package as the Lookup class
1051 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1052 }
1053
1054 if (init) {
1055 ik->initialize(CHECK_NULL);
1056 } else {
1057 ik->link_class(CHECK_NULL);
1058 }
1059
1060 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1061 }
1062
1063 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1064 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1065 JVM_END
1066
1067 /*
1068 * Define a class with the specified lookup class.
1069 * lookup: Lookup class
1070 * name: the name of the class
1071 * buf: class bytes
1072 * len: length of class bytes
1073 * pd: protection domain
1074 * init: initialize the class
1075 * flags: properties of the class
1076 * classData: private static pre-initialized field
1077 */
1078 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1079 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1080
1081 if (lookup == nullptr) {
1082 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1083 }
1084
1085 assert(buf != nullptr, "buf must not be null");
1086
1087 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1088 JVM_END
1089
1090 JVM_ENTRY_PROF(jclass, JVM_DefineClassWithSource, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1091 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1092 JVM_END
1093
1094 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1095 ResourceMark rm(THREAD);
1096
1097 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1098 char* str = java_lang_String::as_utf8_string(h_name());
1099
1100 // Sanity check, don't expect null
1101 if (str == nullptr) return nullptr;
1102
1103 // Internalize the string, converting '.' to '/' in string.
1104 char* p = (char*)str;
1105 while (*p != '\0') {
1106 if (*p == '.') {
1107 *p = '/';
1108 }
1109 p++;
1110 }
1111
1112 const int str_len = (int)(p - str);
1113 if (str_len > Symbol::max_length()) {
1114 // It's impossible to create this class; the name cannot fit
1115 // into the constant pool.
1116 return nullptr;
1117 }
1118 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1119
1120 // Security Note:
1121 // The Java level wrapper will perform the necessary security check allowing
1122 // us to pass the null as the initiating class loader.
1123 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1124 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1125 #if INCLUDE_CDS
1126 if (k == nullptr) {
1127 // If the class is not already loaded, try to see if it's in the shared
1128 // archive for the current classloader (h_loader).
1129 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1130 }
1131 #endif
1132 return (k == nullptr) ? nullptr :
1133 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1134 JVM_END
1135
1136 // Module support //////////////////////////////////////////////////////////////////////////////
1137
1138 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1139 jstring location, jobjectArray packages))
1140 Handle h_module (THREAD, JNIHandles::resolve(module));
1141 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1142 JVM_END
1143
1144 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1145 Handle h_module (THREAD, JNIHandles::resolve(module));
1146 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1147 JVM_END
1148
1149 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1150 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1151 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1152 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1153 JVM_END
1154
1155 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1156 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1157 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1158 JVM_END
1159
1160 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1161 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1162 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1163 JVM_END
1164
1165 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1166 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1167 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1168 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1169 JVM_END
1170
1171 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1172 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1173 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1174 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1175 JVM_END
1176
1177 // Reflection support //////////////////////////////////////////////////////////////////////////////
1178
1179 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1180 assert (cls != nullptr, "illegal class");
1181 JvmtiVMObjectAllocEventCollector oam;
1182 ResourceMark rm(THREAD);
1183 HandleMark hm(THREAD);
1184 Handle java_class(THREAD, JNIHandles::resolve(cls));
1185 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1186 return (jstring) JNIHandles::make_local(THREAD, result);
1187 JVM_END
1188
1189
1190 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1191 JvmtiVMObjectAllocEventCollector oam;
1192 oop mirror = JNIHandles::resolve_non_null(cls);
1193
1194 // Special handling for primitive objects
1195 if (java_lang_Class::is_primitive(mirror)) {
1196 // Primitive objects does not have any interfaces
1197 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1198 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1199 }
1200
1201 Klass* klass = java_lang_Class::as_Klass(mirror);
1202 // Figure size of result array
1203 int size;
1204 if (klass->is_instance_klass()) {
1205 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1206 } else {
1207 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1208 size = 2;
1209 }
1210
1211 // Allocate result array
1212 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1213 objArrayHandle result (THREAD, r);
1214 // Fill in result
1215 if (klass->is_instance_klass()) {
1216 // Regular instance klass, fill in all local interfaces
1217 for (int index = 0; index < size; index++) {
1218 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1219 result->obj_at_put(index, k->java_mirror());
1220 }
1221 } else {
1222 // All arrays implement java.lang.Cloneable and java.io.Serializable
1223 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1224 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1225 }
1226 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1227 JVM_END
1228
1229
1230 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1231 oop mirror = JNIHandles::resolve_non_null(cls);
1232 if (java_lang_Class::is_primitive(mirror)) {
1233 return JNI_FALSE;
1234 }
1235 Klass* k = java_lang_Class::as_Klass(mirror);
1236 return k->is_hidden();
1237 JVM_END
1238
1239 class ScopedValueBindingsResolver {
1240 public:
1241 InstanceKlass* Carrier_klass;
1242 ScopedValueBindingsResolver(JavaThread* THREAD) {
1243 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1244 Carrier_klass = InstanceKlass::cast(k);
1245 }
1246 };
1247
1248 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1249 ResourceMark rm(THREAD);
1250 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1251 JvmtiVMObjectAllocEventCollector oam;
1252
1253 static ScopedValueBindingsResolver resolver(THREAD);
1254
1255 // Iterate through Java frames
1256 vframeStream vfst(thread);
1257 for(; !vfst.at_end(); vfst.next()) {
1258 int loc = -1;
1259 // get method of frame
1260 Method* method = vfst.method();
1261
1262 Symbol *name = method->name();
1263
1264 InstanceKlass* holder = method->method_holder();
1265 if (name == vmSymbols::runWith_method_name()) {
1266 if (holder == vmClasses::Thread_klass()
1267 || holder == resolver.Carrier_klass) {
1268 loc = 1;
1269 }
1270 }
1271
1272 if (loc != -1) {
1273 javaVFrame *frame = vfst.asJavaVFrame();
1274 StackValueCollection* locals = frame->locals();
1275 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1276 Handle result = head_sv->get_obj();
1277 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1278 if (result() != nullptr) {
1279 return JNIHandles::make_local(THREAD, result());
1280 }
1281 }
1282 }
1283
1284 return nullptr;
1285 JVM_END
1286
1287
1288 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1289 JvmtiVMObjectAllocEventCollector oam;
1290 // ofClass is a reference to a java_lang_Class object. The mirror object
1291 // of an InstanceKlass
1292 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1293 if (java_lang_Class::is_primitive(ofMirror) ||
1294 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1295 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1296 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1297 }
1298
1299 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1300 InnerClassesIterator iter(k);
1301
1302 if (iter.length() == 0) {
1303 // Neither an inner nor outer class
1304 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1305 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1306 }
1307
1308 // find inner class info
1309 constantPoolHandle cp(thread, k->constants());
1310 int length = iter.length();
1311
1312 // Allocate temp. result array
1313 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1314 objArrayHandle result (THREAD, r);
1315 int members = 0;
1316
1317 for (; !iter.done(); iter.next()) {
1318 int ioff = iter.inner_class_info_index();
1319 int ooff = iter.outer_class_info_index();
1320
1321 if (ioff != 0 && ooff != 0) {
1322 // Check to see if the name matches the class we're looking for
1323 // before attempting to find the class.
1324 if (cp->klass_name_at_matches(k, ooff)) {
1325 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1326 if (outer_klass == k) {
1327 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1328 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1329
1330 // Throws an exception if outer klass has not declared k as
1331 // an inner klass
1332 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1333
1334 result->obj_at_put(members, inner_klass->java_mirror());
1335 members++;
1336 }
1337 }
1338 }
1339 }
1340
1341 if (members != length) {
1342 // Return array of right length
1343 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1344 for(int i = 0; i < members; i++) {
1345 res->obj_at_put(i, result->obj_at(i));
1346 }
1347 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1348 }
1349
1350 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1351 JVM_END
1352
1353
1354 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1355 {
1356 // ofClass is a reference to a java_lang_Class object.
1357 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1358 if (java_lang_Class::is_primitive(ofMirror)) {
1359 return nullptr;
1360 }
1361 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1362 if (!klass->is_instance_klass()) {
1363 return nullptr;
1364 }
1365
1366 bool inner_is_member = false;
1367 Klass* outer_klass
1368 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1369 if (outer_klass == nullptr) return nullptr; // already a top-level class
1370 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1371 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1372 }
1373 JVM_END
1374
1375 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1376 {
1377 oop mirror = JNIHandles::resolve_non_null(cls);
1378 if (java_lang_Class::is_primitive(mirror)) {
1379 return nullptr;
1380 }
1381 Klass* klass = java_lang_Class::as_Klass(mirror);
1382 if (!klass->is_instance_klass()) {
1383 return nullptr;
1384 }
1385 InstanceKlass* k = InstanceKlass::cast(klass);
1386 int ooff = 0, noff = 0;
1387 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1388 if (noff != 0) {
1389 constantPoolHandle i_cp(thread, k->constants());
1390 Symbol* name = i_cp->symbol_at(noff);
1391 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1392 return (jstring) JNIHandles::make_local(THREAD, str());
1393 }
1394 }
1395 return nullptr;
1396 }
1397 JVM_END
1398
1399 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1400 assert (cls != nullptr, "illegal class");
1401 JvmtiVMObjectAllocEventCollector oam;
1402 ResourceMark rm(THREAD);
1403 oop mirror = JNIHandles::resolve_non_null(cls);
1404 // Return null for arrays and primitives
1405 if (!java_lang_Class::is_primitive(mirror)) {
1406 Klass* k = java_lang_Class::as_Klass(mirror);
1407 if (k->is_instance_klass()) {
1408 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1409 if (sym == nullptr) return nullptr;
1410 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1411 return (jstring) JNIHandles::make_local(THREAD, str());
1412 }
1413 }
1414 return nullptr;
1415 JVM_END
1416
1417
1418 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1419 assert (cls != nullptr, "illegal class");
1420 oop mirror = JNIHandles::resolve_non_null(cls);
1421 // Return null for arrays and primitives
1422 if (!java_lang_Class::is_primitive(mirror)) {
1423 Klass* k = java_lang_Class::as_Klass(mirror);
1424 if (k->is_instance_klass()) {
1425 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1426 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1427 }
1428 }
1429 return nullptr;
1430 JVM_END
1431
1432
1433 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1434 // some of this code was adapted from from jni_FromReflectedField
1435
1436 oop reflected = JNIHandles::resolve_non_null(field);
1437 oop mirror = java_lang_reflect_Field::clazz(reflected);
1438 Klass* k = java_lang_Class::as_Klass(mirror);
1439 int slot = java_lang_reflect_Field::slot(reflected);
1440 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1441
1442 InstanceKlass* ik = InstanceKlass::cast(k);
1443 int offset = ik->field_offset(slot);
1444
1445 if (modifiers & JVM_ACC_STATIC) {
1446 // for static fields we only look in the current class
1447 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1448 assert(false, "cannot find static field");
1449 return false;
1450 }
1451 } else {
1452 // for instance fields we start with the current class and work
1453 // our way up through the superclass chain
1454 if (!ik->find_field_from_offset(offset, false, &fd)) {
1455 assert(false, "cannot find instance field");
1456 return false;
1457 }
1458 }
1459 return true;
1460 }
1461
1462 static Method* jvm_get_method_common(jobject method) {
1463 // some of this code was adapted from from jni_FromReflectedMethod
1464
1465 oop reflected = JNIHandles::resolve_non_null(method);
1466 oop mirror = nullptr;
1467 int slot = 0;
1468
1469 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1470 mirror = java_lang_reflect_Constructor::clazz(reflected);
1471 slot = java_lang_reflect_Constructor::slot(reflected);
1472 } else {
1473 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1474 "wrong type");
1475 mirror = java_lang_reflect_Method::clazz(reflected);
1476 slot = java_lang_reflect_Method::slot(reflected);
1477 }
1478 Klass* k = java_lang_Class::as_Klass(mirror);
1479
1480 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1481 assert(m != nullptr, "cannot find method");
1482 return m; // caller has to deal with null in product mode
1483 }
1484
1485 /* Type use annotations support (JDK 1.8) */
1486
1487 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1488 assert (cls != nullptr, "illegal class");
1489 ResourceMark rm(THREAD);
1490 // Return null for arrays and primitives
1491 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1493 if (k->is_instance_klass()) {
1494 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1495 if (type_annotations != nullptr) {
1496 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1497 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1498 }
1499 }
1500 }
1501 return nullptr;
1502 JVM_END
1503
1504 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1505 assert (method != nullptr, "illegal method");
1506 // method is a handle to a java.lang.reflect.Method object
1507 Method* m = jvm_get_method_common(method);
1508 if (m == nullptr) {
1509 return nullptr;
1510 }
1511
1512 AnnotationArray* type_annotations = m->type_annotations();
1513 if (type_annotations != nullptr) {
1514 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1515 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1516 }
1517
1518 return nullptr;
1519 JVM_END
1520
1521 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1522 assert (field != nullptr, "illegal field");
1523 fieldDescriptor fd;
1524 bool gotFd = jvm_get_field_common(field, fd);
1525 if (!gotFd) {
1526 return nullptr;
1527 }
1528
1529 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1530 JVM_END
1531
1532 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1533 if (!cp->is_within_bounds(index)) {
1534 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1535 }
1536 }
1537
1538 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1539 {
1540 // method is a handle to a java.lang.reflect.Method object
1541 Method* method_ptr = jvm_get_method_common(method);
1542 methodHandle mh (THREAD, method_ptr);
1543 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1544 const int num_params = mh->method_parameters_length();
1545
1546 if (num_params < 0) {
1547 // A -1 return value from method_parameters_length means there is no
1548 // parameter data. Return null to indicate this to the reflection
1549 // API.
1550 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1551 return (jobjectArray)nullptr;
1552 } else {
1553 // Otherwise, we return something up to reflection, even if it is
1554 // a zero-length array. Why? Because in some cases this can
1555 // trigger a MalformedParametersException.
1556
1557 // make sure all the symbols are properly formatted
1558 for (int i = 0; i < num_params; i++) {
1559 MethodParametersElement* params = mh->method_parameters_start();
1560 int index = params[i].name_cp_index;
1561 constantPoolHandle cp(THREAD, mh->constants());
1562 bounds_check(cp, index, CHECK_NULL);
1563
1564 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1565 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1566 "Wrong type at constant pool index");
1567 }
1568
1569 }
1570
1571 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1572 objArrayHandle result (THREAD, result_oop);
1573
1574 for (int i = 0; i < num_params; i++) {
1575 MethodParametersElement* params = mh->method_parameters_start();
1576 // For a 0 index, give a null symbol
1577 Symbol* sym = 0 != params[i].name_cp_index ?
1578 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1579 int flags = params[i].flags;
1580 oop param = Reflection::new_parameter(reflected_method, i, sym,
1581 flags, CHECK_NULL);
1582 result->obj_at_put(i, param);
1583 }
1584 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1585 }
1586 }
1587 JVM_END
1588
1589 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1590
1591 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1592 {
1593 JvmtiVMObjectAllocEventCollector oam;
1594
1595 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1596 // Exclude primitive types and array types
1597 if (java_lang_Class::is_primitive(ofMirror) ||
1598 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1599 // Return empty array
1600 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1601 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1602 }
1603
1604 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1605 constantPoolHandle cp(THREAD, k->constants());
1606
1607 // Ensure class is linked
1608 k->link_class(CHECK_NULL);
1609
1610 // Allocate result
1611 int num_fields;
1612
1613 if (publicOnly) {
1614 num_fields = 0;
1615 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1616 if (fs.access_flags().is_public()) ++num_fields;
1617 }
1618 } else {
1619 num_fields = k->java_fields_count();
1620 }
1621
1622 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1623 objArrayHandle result (THREAD, r);
1624
1625 int out_idx = 0;
1626 fieldDescriptor fd;
1627 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1628 if (!publicOnly || fs.access_flags().is_public()) {
1629 fd.reinitialize(k, fs.to_FieldInfo());
1630 oop field = Reflection::new_field(&fd, CHECK_NULL);
1631 result->obj_at_put(out_idx, field);
1632 ++out_idx;
1633 }
1634 }
1635 assert(out_idx == num_fields, "just checking");
1636 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1637 }
1638 JVM_END
1639
1640 // A class is a record if and only if it is final and a direct subclass of
1641 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1642 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1643 {
1644 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1645 if (k != nullptr && k->is_instance_klass()) {
1646 InstanceKlass* ik = InstanceKlass::cast(k);
1647 return ik->is_record();
1648 } else {
1649 return false;
1650 }
1651 }
1652 JVM_END
1653
1654 // Returns an array containing the components of the Record attribute,
1655 // or null if the attribute is not present.
1656 //
1657 // Note that this function returns the components of the Record attribute
1658 // even if the class is not a record.
1659 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1660 {
1661 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1662 assert(c->is_instance_klass(), "must be");
1663 InstanceKlass* ik = InstanceKlass::cast(c);
1664
1665 Array<RecordComponent*>* components = ik->record_components();
1666 if (components != nullptr) {
1667 JvmtiVMObjectAllocEventCollector oam;
1668 constantPoolHandle cp(THREAD, ik->constants());
1669 int length = components->length();
1670 assert(length >= 0, "unexpected record_components length");
1671 objArrayOop record_components =
1672 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1673 objArrayHandle components_h (THREAD, record_components);
1674
1675 for (int x = 0; x < length; x++) {
1676 RecordComponent* component = components->at(x);
1677 assert(component != nullptr, "unexpected null record component");
1678 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1679 components_h->obj_at_put(x, component_oop);
1680 }
1681 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1682 }
1683
1684 return nullptr;
1685 }
1686 JVM_END
1687
1688 static jobjectArray get_class_declared_methods_helper(
1689 JNIEnv *env,
1690 jclass ofClass, jboolean publicOnly,
1691 bool want_constructor,
1692 Klass* klass, TRAPS) {
1693
1694 JvmtiVMObjectAllocEventCollector oam;
1695
1696 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1697 // Exclude primitive types and array types
1698 if (java_lang_Class::is_primitive(ofMirror)
1699 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1700 // Return empty array
1701 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1702 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1703 }
1704
1705 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1706
1707 // Ensure class is linked
1708 k->link_class(CHECK_NULL);
1709
1710 Array<Method*>* methods = k->methods();
1711 int methods_length = methods->length();
1712
1713 // Save original method_idnum in case of redefinition, which can change
1714 // the idnum of obsolete methods. The new method will have the same idnum
1715 // but if we refresh the methods array, the counts will be wrong.
1716 ResourceMark rm(THREAD);
1717 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1718 int num_methods = 0;
1719
1720 // Select methods matching the criteria.
1721 for (int i = 0; i < methods_length; i++) {
1722 Method* method = methods->at(i);
1723 if (want_constructor && !method->is_object_initializer()) {
1724 continue;
1725 }
1726 if (!want_constructor &&
1727 (method->is_object_initializer() || method->is_static_initializer() ||
1728 method->is_overpass())) {
1729 continue;
1730 }
1731 if (publicOnly && !method->is_public()) {
1732 continue;
1733 }
1734 idnums->push(method->method_idnum());
1735 ++num_methods;
1736 }
1737
1738 // Allocate result
1739 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1740 objArrayHandle result (THREAD, r);
1741
1742 // Now just put the methods that we selected above, but go by their idnum
1743 // in case of redefinition. The methods can be redefined at any safepoint,
1744 // so above when allocating the oop array and below when creating reflect
1745 // objects.
1746 for (int i = 0; i < num_methods; i++) {
1747 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1748 if (method.is_null()) {
1749 // Method may have been deleted and seems this API can handle null
1750 // Otherwise should probably put a method that throws NSME
1751 result->obj_at_put(i, nullptr);
1752 } else {
1753 oop m;
1754 if (want_constructor) {
1755 m = Reflection::new_constructor(method, CHECK_NULL);
1756 } else {
1757 m = Reflection::new_method(method, false, CHECK_NULL);
1758 }
1759 result->obj_at_put(i, m);
1760 }
1761 }
1762
1763 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1764 }
1765
1766 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1767 {
1768 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1769 /*want_constructor*/ false,
1770 vmClasses::reflect_Method_klass(), THREAD);
1771 }
1772 JVM_END
1773
1774 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1775 {
1776 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1777 /*want_constructor*/ true,
1778 vmClasses::reflect_Constructor_klass(), THREAD);
1779 }
1780 JVM_END
1781
1782 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1783 {
1784 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1785 assert(c->is_instance_klass(), "must be");
1786 InstanceKlass* ck = InstanceKlass::cast(c);
1787 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1788 assert(m->is_instance_klass(), "must be");
1789 InstanceKlass* mk = InstanceKlass::cast(m);
1790 return ck->has_nestmate_access_to(mk, THREAD);
1791 }
1792 JVM_END
1793
1794 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1795 {
1796 // current is not a primitive or array class
1797 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1798 assert(c->is_instance_klass(), "must be");
1799 InstanceKlass* ck = InstanceKlass::cast(c);
1800 InstanceKlass* host = ck->nest_host(THREAD);
1801 return (jclass) (host == nullptr ? nullptr :
1802 JNIHandles::make_local(THREAD, host->java_mirror()));
1803 }
1804 JVM_END
1805
1806 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1807 {
1808 // current is not a primitive or array class
1809 ResourceMark rm(THREAD);
1810 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1811 assert(c->is_instance_klass(), "must be");
1812 InstanceKlass* ck = InstanceKlass::cast(c);
1813 InstanceKlass* host = ck->nest_host(THREAD);
1814
1815 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1816 ck->external_name(), host->external_name());
1817 {
1818 JvmtiVMObjectAllocEventCollector oam;
1819 Array<u2>* members = host->nest_members();
1820 int length = members == nullptr ? 0 : members->length();
1821
1822 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1823
1824 // nest host is first in the array so make it one bigger
1825 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1826 length + 1, CHECK_NULL);
1827 objArrayHandle result(THREAD, r);
1828 result->obj_at_put(0, host->java_mirror());
1829 if (length != 0) {
1830 int count = 0;
1831 for (int i = 0; i < length; i++) {
1832 int cp_index = members->at(i);
1833 Klass* k = host->constants()->klass_at(cp_index, THREAD);
1834 if (HAS_PENDING_EXCEPTION) {
1835 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1836 return nullptr; // propagate VMEs
1837 }
1838 if (log_is_enabled(Trace, class, nestmates)) {
1839 stringStream ss;
1840 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1841 ss.print(" - resolution of nest member %s failed: ", target_member_class);
1842 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1843 log_trace(class, nestmates)("%s", ss.as_string());
1844 }
1845 CLEAR_PENDING_EXCEPTION;
1846 continue;
1847 }
1848 if (k->is_instance_klass()) {
1849 InstanceKlass* ik = InstanceKlass::cast(k);
1850 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1851 if (nest_host_k == host) {
1852 result->obj_at_put(count+1, k->java_mirror());
1853 count++;
1854 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1855 } else {
1856 log_trace(class, nestmates)(" - skipping member %s with different host %s",
1857 ik->external_name(), nest_host_k->external_name());
1858 }
1859 } else {
1860 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1861 k->external_name());
1862 }
1863 }
1864 if (count < length) {
1865 // we had invalid entries so we need to compact the array
1866 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1867 length + 1, count + 1);
1868
1869 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1870 count + 1, CHECK_NULL);
1871 objArrayHandle result2(THREAD, r2);
1872 for (int i = 0; i < count + 1; i++) {
1873 result2->obj_at_put(i, result->obj_at(i));
1874 }
1875 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1876 }
1877 }
1878 else {
1879 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
1880 }
1881 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1882 }
1883 }
1884 JVM_END
1885
1886 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1887 {
1888 oop mirror = JNIHandles::resolve_non_null(current);
1889 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1890 Klass* c = java_lang_Class::as_Klass(mirror);
1891 assert(c->is_instance_klass(), "must be");
1892 InstanceKlass* ik = InstanceKlass::cast(c);
1893 ResourceMark rm(THREAD);
1894 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1895 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1896 if (ik->is_sealed()) {
1897 JvmtiVMObjectAllocEventCollector oam;
1898 Array<u2>* subclasses = ik->permitted_subclasses();
1899 int length = subclasses->length();
1900
1901 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1902
1903 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1904 length, CHECK_NULL);
1905 objArrayHandle result(THREAD, r);
1906 int count = 0;
1907 for (int i = 0; i < length; i++) {
1908 int cp_index = subclasses->at(i);
1909 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
1910 if (HAS_PENDING_EXCEPTION) {
1911 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1912 return nullptr; // propagate VMEs
1913 }
1914 if (log_is_enabled(Trace, class, sealed)) {
1915 stringStream ss;
1916 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
1917 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
1918 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1919 log_trace(class, sealed)("%s", ss.as_string());
1920 }
1921
1922 CLEAR_PENDING_EXCEPTION;
1923 continue;
1924 }
1925 if (k->is_instance_klass()) {
1926 result->obj_at_put(count++, k->java_mirror());
1927 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
1928 }
1929 }
1930 if (count < length) {
1931 // we had invalid entries so we need to compact the array
1932 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1933 count, CHECK_NULL);
1934 objArrayHandle result2(THREAD, r2);
1935 for (int i = 0; i < count; i++) {
1936 result2->obj_at_put(i, result->obj_at(i));
1937 }
1938 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1939 }
1940 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1941 } else {
1942 return nullptr;
1943 }
1944 }
1945 JVM_END
1946
1947 // Constant pool access //////////////////////////////////////////////////////////
1948
1949 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1950 {
1951 JvmtiVMObjectAllocEventCollector oam;
1952 oop mirror = JNIHandles::resolve_non_null(cls);
1953 // Return null for primitives and arrays
1954 if (!java_lang_Class::is_primitive(mirror)) {
1955 Klass* k = java_lang_Class::as_Klass(mirror);
1956 if (k->is_instance_klass()) {
1957 InstanceKlass* k_h = InstanceKlass::cast(k);
1958 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1959 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1960 return JNIHandles::make_local(THREAD, jcp());
1961 }
1962 }
1963 return nullptr;
1964 }
1965 JVM_END
1966
1967
1968 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1969 {
1970 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1971 return cp->length();
1972 }
1973 JVM_END
1974
1975
1976 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1977 {
1978 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1979 bounds_check(cp, index, CHECK_NULL);
1980 constantTag tag = cp->tag_at(index);
1981 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1982 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1983 }
1984 Klass* k = cp->klass_at(index, CHECK_NULL);
1985 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1986 }
1987 JVM_END
1988
1989 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1990 {
1991 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1992 bounds_check(cp, index, CHECK_NULL);
1993 constantTag tag = cp->tag_at(index);
1994 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1995 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1996 }
1997 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1998 if (k == nullptr) return nullptr;
1999 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2000 }
2001 JVM_END
2002
2003 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2004 constantTag tag = cp->tag_at(index);
2005 if (!tag.is_method() && !tag.is_interface_method()) {
2006 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2007 }
2008 int klass_ref = cp->uncached_klass_ref_index_at(index);
2009 Klass* k_o;
2010 if (force_resolution) {
2011 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2012 } else {
2013 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2014 if (k_o == nullptr) return nullptr;
2015 }
2016 InstanceKlass* k = InstanceKlass::cast(k_o);
2017 Symbol* name = cp->uncached_name_ref_at(index);
2018 Symbol* sig = cp->uncached_signature_ref_at(index);
2019 methodHandle m (THREAD, k->find_method(name, sig));
2020 if (m.is_null()) {
2021 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2022 }
2023 oop method;
2024 if (m->is_object_initializer()) {
2025 method = Reflection::new_constructor(m, CHECK_NULL);
2026 } else {
2027 // new_method accepts <clinit> as Method here
2028 method = Reflection::new_method(m, true, CHECK_NULL);
2029 }
2030 return JNIHandles::make_local(THREAD, method);
2031 }
2032
2033 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
2034 {
2035 JvmtiVMObjectAllocEventCollector oam;
2036 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2037 bounds_check(cp, index, CHECK_NULL);
2038 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2039 return res;
2040 }
2041 JVM_END
2042
2043 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2044 {
2045 JvmtiVMObjectAllocEventCollector oam;
2046 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047 bounds_check(cp, index, CHECK_NULL);
2048 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2049 return res;
2050 }
2051 JVM_END
2052
2053 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2054 constantTag tag = cp->tag_at(index);
2055 if (!tag.is_field()) {
2056 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2057 }
2058 int klass_ref = cp->uncached_klass_ref_index_at(index);
2059 Klass* k_o;
2060 if (force_resolution) {
2061 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2062 } else {
2063 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2064 if (k_o == nullptr) return nullptr;
2065 }
2066 InstanceKlass* k = InstanceKlass::cast(k_o);
2067 Symbol* name = cp->uncached_name_ref_at(index);
2068 Symbol* sig = cp->uncached_signature_ref_at(index);
2069 fieldDescriptor fd;
2070 Klass* target_klass = k->find_field(name, sig, &fd);
2071 if (target_klass == nullptr) {
2072 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2073 }
2074 oop field = Reflection::new_field(&fd, CHECK_NULL);
2075 return JNIHandles::make_local(THREAD, field);
2076 }
2077
2078 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2079 {
2080 JvmtiVMObjectAllocEventCollector oam;
2081 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2082 bounds_check(cp, index, CHECK_NULL);
2083 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2084 return res;
2085 }
2086 JVM_END
2087
2088 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2089 {
2090 JvmtiVMObjectAllocEventCollector oam;
2091 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 bounds_check(cp, index, CHECK_NULL);
2093 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2094 return res;
2095 }
2096 JVM_END
2097
2098 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jint index))
2099 {
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 constantTag tag = cp->tag_at(index);
2104 if (!tag.is_field_or_method()) {
2105 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106 }
2107 int klass_ref = cp->uncached_klass_ref_index_at(index);
2108 Symbol* klass_name = cp->klass_name_at(klass_ref);
2109 Symbol* member_name = cp->uncached_name_ref_at(index);
2110 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2111 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2112 objArrayHandle dest(THREAD, dest_o);
2113 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2114 dest->obj_at_put(0, str());
2115 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2116 dest->obj_at_put(1, str());
2117 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2118 dest->obj_at_put(2, str());
2119 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2120 }
2121 JVM_END
2122
2123 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2124 {
2125 JvmtiVMObjectAllocEventCollector oam;
2126 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2127 bounds_check(cp, index, CHECK_0);
2128 constantTag tag = cp->tag_at(index);
2129 if (!tag.is_field_or_method()) {
2130 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2131 }
2132 return (jint) cp->uncached_klass_ref_index_at(index);
2133 }
2134 JVM_END
2135
2136 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2137 {
2138 JvmtiVMObjectAllocEventCollector oam;
2139 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2140 bounds_check(cp, index, CHECK_0);
2141 constantTag tag = cp->tag_at(index);
2142 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2143 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2144 }
2145 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2146 }
2147 JVM_END
2148
2149 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2150 {
2151 JvmtiVMObjectAllocEventCollector oam;
2152 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2153 bounds_check(cp, index, CHECK_NULL);
2154 constantTag tag = cp->tag_at(index);
2155 if (!tag.is_name_and_type()) {
2156 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2157 }
2158 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2159 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2160 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2161 objArrayHandle dest(THREAD, dest_o);
2162 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2163 dest->obj_at_put(0, str());
2164 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2165 dest->obj_at_put(1, str());
2166 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2167 }
2168 JVM_END
2169
2170 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2171 {
2172 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2173 bounds_check(cp, index, CHECK_0);
2174 constantTag tag = cp->tag_at(index);
2175 if (!tag.is_int()) {
2176 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2177 }
2178 return cp->int_at(index);
2179 }
2180 JVM_END
2181
2182 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2183 {
2184 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2185 bounds_check(cp, index, CHECK_(0L));
2186 constantTag tag = cp->tag_at(index);
2187 if (!tag.is_long()) {
2188 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2189 }
2190 return cp->long_at(index);
2191 }
2192 JVM_END
2193
2194 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2195 {
2196 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2197 bounds_check(cp, index, CHECK_(0.0f));
2198 constantTag tag = cp->tag_at(index);
2199 if (!tag.is_float()) {
2200 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2201 }
2202 return cp->float_at(index);
2203 }
2204 JVM_END
2205
2206 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2207 {
2208 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2209 bounds_check(cp, index, CHECK_(0.0));
2210 constantTag tag = cp->tag_at(index);
2211 if (!tag.is_double()) {
2212 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2213 }
2214 return cp->double_at(index);
2215 }
2216 JVM_END
2217
2218 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2219 {
2220 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2221 bounds_check(cp, index, CHECK_NULL);
2222 constantTag tag = cp->tag_at(index);
2223 if (!tag.is_string()) {
2224 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2225 }
2226 oop str = cp->string_at(index, CHECK_NULL);
2227 return (jstring) JNIHandles::make_local(THREAD, str);
2228 }
2229 JVM_END
2230
2231 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2232 {
2233 JvmtiVMObjectAllocEventCollector oam;
2234 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2235 bounds_check(cp, index, CHECK_NULL);
2236 constantTag tag = cp->tag_at(index);
2237 if (!tag.is_symbol()) {
2238 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2239 }
2240 Symbol* sym = cp->symbol_at(index);
2241 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2242 return (jstring) JNIHandles::make_local(THREAD, str());
2243 }
2244 JVM_END
2245
2246 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2247 {
2248 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2249 bounds_check(cp, index, CHECK_0);
2250 constantTag tag = cp->tag_at(index);
2251 jbyte result = tag.value();
2252 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2253 // they are changed to the corresponding tags from the JVM spec, so that java code in
2254 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2255 if (tag.is_klass_or_reference()) {
2256 result = JVM_CONSTANT_Class;
2257 } else if (tag.is_string_index()) {
2258 result = JVM_CONSTANT_String;
2259 } else if (tag.is_method_type_in_error()) {
2260 result = JVM_CONSTANT_MethodType;
2261 } else if (tag.is_method_handle_in_error()) {
2262 result = JVM_CONSTANT_MethodHandle;
2263 } else if (tag.is_dynamic_constant_in_error()) {
2264 result = JVM_CONSTANT_Dynamic;
2265 }
2266 return result;
2267 }
2268 JVM_END
2269
2270 // Assertion support. //////////////////////////////////////////////////////////
2271
2272 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2273 assert(cls != nullptr, "bad class");
2274
2275 oop r = JNIHandles::resolve(cls);
2276 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2277 if (java_lang_Class::is_primitive(r)) return false;
2278
2279 Klass* k = java_lang_Class::as_Klass(r);
2280 assert(k->is_instance_klass(), "must be an instance klass");
2281 if (!k->is_instance_klass()) return false;
2282
2283 ResourceMark rm(THREAD);
2284 const char* name = k->name()->as_C_string();
2285 bool system_class = k->class_loader() == nullptr;
2286 return JavaAssertions::enabled(name, system_class);
2287
2288 JVM_END
2289
2290
2291 // Return a new AssertionStatusDirectives object with the fields filled in with
2292 // command-line assertion arguments (i.e., -ea, -da).
2293 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2294 JvmtiVMObjectAllocEventCollector oam;
2295 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2296 return JNIHandles::make_local(THREAD, asd);
2297 JVM_END
2298
2299 // Verification ////////////////////////////////////////////////////////////////////////////////
2300
2301 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2302
2303 // RedefineClasses support: bug 6214132 caused verification to fail.
2304 // All functions from this section should call the jvmtiThreadSate function:
2305 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2306 // The function returns a Klass* of the _scratch_class if the verifier
2307 // was invoked in the middle of the class redefinition.
2308 // Otherwise it returns its argument value which is the _the_class Klass*.
2309 // Please, refer to the description in the jvmtiThreadState.hpp.
2310
2311 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
2312 oop mirror = JNIHandles::resolve_non_null(cls);
2313 if (java_lang_Class::is_primitive(mirror)) {
2314 return JNI_FALSE;
2315 }
2316 Klass* k = java_lang_Class::as_Klass(mirror);
2317 // This isn't necessary since answer is the same since redefinition
2318 // has already checked this matches for the scratch class.
2319 // k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320 jboolean result = k->is_interface();
2321 assert(!result || k->is_instance_klass(),
2322 "all interfaces are instance types");
2323 return result;
2324 JVM_END
2325
2326
2327 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2328 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2329 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2330 return k->name()->as_utf8();
2331 JVM_END
2332
2333
2334 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 // types will have length zero if this is not an InstanceKlass
2338 // (length is determined by call to JVM_GetClassCPEntriesCount)
2339 if (k->is_instance_klass()) {
2340 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2341 for (int index = cp->length() - 1; index >= 0; index--) {
2342 constantTag tag = cp->tag_at(index);
2343 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2344 }
2345 }
2346 JVM_END
2347
2348
2349 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2353 JVM_END
2354
2355
2356 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2357 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2359 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2360 JVM_END
2361
2362
2363 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2364 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2365 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2366 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2367 JVM_END
2368
2369
2370 // The following methods, used for the verifier, are never called with
2371 // array klasses, so a direct cast to InstanceKlass is safe.
2372 // Typically, these methods are called in a loop with bounds determined
2373 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2374 // zero for arrays.
2375 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379 int length = method->checked_exceptions_length();
2380 if (length > 0) {
2381 CheckedExceptionElement* table= method->checked_exceptions_start();
2382 for (int i = 0; i < length; i++) {
2383 exceptions[i] = table[i].class_cp_index;
2384 }
2385 }
2386 JVM_END
2387
2388
2389 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2393 return method->checked_exceptions_length();
2394 JVM_END
2395
2396
2397 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2398 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2399 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2401 memcpy(code, method->code_base(), method->code_size());
2402 JVM_END
2403
2404
2405 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2406 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2407 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2408 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2409 return method->code_size();
2410 JVM_END
2411
2412
2413 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 ExceptionTable extable(method);
2418 entry->start_pc = extable.start_pc(entry_index);
2419 entry->end_pc = extable.end_pc(entry_index);
2420 entry->handler_pc = extable.handler_pc(entry_index);
2421 entry->catchType = extable.catch_type_index(entry_index);
2422 JVM_END
2423
2424
2425 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2427 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2428 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2429 return method->exception_table_length();
2430 JVM_END
2431
2432
2433 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2434 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2437 return method->access_flags().as_method_flags();
2438 JVM_END
2439
2440
2441 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2442 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2443 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444 return InstanceKlass::cast(k)->field_access_flags(field_index);
2445 JVM_END
2446
2447
2448 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->max_locals();
2453 JVM_END
2454
2455
2456 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2457 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2458 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2459 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2460 return method->size_of_parameters();
2461 JVM_END
2462
2463
2464 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
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 return method->verifier_max_stack();
2469 JVM_END
2470
2471
2472 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2473 ResourceMark rm(THREAD);
2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2476 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2477 return method->name() == vmSymbols::object_initializer_name();
2478 JVM_END
2479
2480
2481 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2482 ResourceMark rm(THREAD);
2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2485 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2486 return method->is_overpass();
2487 JVM_END
2488
2489 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2493 return method->name()->as_utf8();
2494 JVM_END
2495
2496
2497 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2498 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2499 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2500 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2501 return method->signature()->as_utf8();
2502 JVM_END
2503
2504 /**
2505 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2506 * read entries in the constant pool. Since the old verifier always
2507 * works on a copy of the code, it will not see any rewriting that
2508 * may possibly occur in the middle of verification. So it is important
2509 * that nothing it calls tries to use the cpCache instead of the raw
2510 * constant pool, so we must use cp->uncached_x methods when appropriate.
2511 */
2512 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516 switch (cp->tag_at(cp_index).value()) {
2517 case JVM_CONSTANT_Fieldref:
2518 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2519 default:
2520 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2521 }
2522 ShouldNotReachHere();
2523 return nullptr;
2524 JVM_END
2525
2526
2527 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2528 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2529 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2530 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2531 switch (cp->tag_at(cp_index).value()) {
2532 case JVM_CONSTANT_InterfaceMethodref:
2533 case JVM_CONSTANT_Methodref:
2534 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2535 default:
2536 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2537 }
2538 ShouldNotReachHere();
2539 return nullptr;
2540 JVM_END
2541
2542
2543 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2544 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2545 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2546 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2547 switch (cp->tag_at(cp_index).value()) {
2548 case JVM_CONSTANT_InterfaceMethodref:
2549 case JVM_CONSTANT_Methodref:
2550 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2551 default:
2552 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2553 }
2554 ShouldNotReachHere();
2555 return nullptr;
2556 JVM_END
2557
2558
2559 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2560 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2561 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2562 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2563 switch (cp->tag_at(cp_index).value()) {
2564 case JVM_CONSTANT_Fieldref:
2565 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2566 default:
2567 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2568 }
2569 ShouldNotReachHere();
2570 return nullptr;
2571 JVM_END
2572
2573
2574 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 Symbol* classname = cp->klass_name_at(cp_index);
2579 return classname->as_utf8();
2580 JVM_END
2581
2582
2583 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587 switch (cp->tag_at(cp_index).value()) {
2588 case JVM_CONSTANT_Fieldref: {
2589 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2590 Symbol* classname = cp->klass_name_at(class_index);
2591 return classname->as_utf8();
2592 }
2593 default:
2594 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2595 }
2596 ShouldNotReachHere();
2597 return nullptr;
2598 JVM_END
2599
2600
2601 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(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_Methodref:
2607 case JVM_CONSTANT_InterfaceMethodref: {
2608 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2609 Symbol* classname = cp->klass_name_at(class_index);
2610 return classname->as_utf8();
2611 }
2612 default:
2613 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2614 }
2615 ShouldNotReachHere();
2616 return nullptr;
2617 JVM_END
2618
2619
2620 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2621 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2622 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2623 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2624 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2625 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2626 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2627 switch (cp->tag_at(cp_index).value()) {
2628 case JVM_CONSTANT_Fieldref: {
2629 Symbol* name = cp->uncached_name_ref_at(cp_index);
2630 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2631 InstanceKlass* ik = InstanceKlass::cast(k_called);
2632 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2633 if (fs.name() == name && fs.signature() == signature) {
2634 return fs.access_flags().as_field_flags();
2635 }
2636 }
2637 return -1;
2638 }
2639 default:
2640 fatal("JVM_GetCPFieldModifiers: illegal constant");
2641 }
2642 ShouldNotReachHere();
2643 return 0;
2644 JVM_END
2645
2646
2647 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2648 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2649 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2650 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2652 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2653 switch (cp->tag_at(cp_index).value()) {
2654 case JVM_CONSTANT_Methodref:
2655 case JVM_CONSTANT_InterfaceMethodref: {
2656 Symbol* name = cp->uncached_name_ref_at(cp_index);
2657 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2658 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2659 int methods_count = methods->length();
2660 for (int i = 0; i < methods_count; i++) {
2661 Method* method = methods->at(i);
2662 if (method->name() == name && method->signature() == signature) {
2663 return method->access_flags().as_method_flags();
2664 }
2665 }
2666 return -1;
2667 }
2668 default:
2669 fatal("JVM_GetCPMethodModifiers: illegal constant");
2670 }
2671 ShouldNotReachHere();
2672 return 0;
2673 JVM_END
2674
2675
2676 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2677
2678 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2679 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2680 JVM_END
2681
2682
2683 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2684 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2685 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2686 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2687 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2688 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2689 JVM_END
2690
2691 // Printing support //////////////////////////////////////////////////
2692 extern "C" {
2693
2694 ATTRIBUTE_PRINTF(3, 0)
2695 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2696 // Reject count values that are negative signed values converted to
2697 // unsigned; see bug 4399518, 4417214
2698 if ((intptr_t)count <= 0) return -1;
2699
2700 int result = os::vsnprintf(str, count, fmt, args);
2701 if (result > 0 && (size_t)result >= count) {
2702 result = -1;
2703 }
2704
2705 return result;
2706 }
2707
2708 ATTRIBUTE_PRINTF(3, 4)
2709 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2710 va_list args;
2711 int len;
2712 va_start(args, fmt);
2713 len = jio_vsnprintf(str, count, fmt, args);
2714 va_end(args);
2715 return len;
2716 }
2717
2718 ATTRIBUTE_PRINTF(2, 3)
2719 int jio_fprintf(FILE* f, const char *fmt, ...) {
2720 int len;
2721 va_list args;
2722 va_start(args, fmt);
2723 len = jio_vfprintf(f, fmt, args);
2724 va_end(args);
2725 return len;
2726 }
2727
2728 ATTRIBUTE_PRINTF(2, 0)
2729 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2730 if (Arguments::vfprintf_hook() != nullptr) {
2731 return Arguments::vfprintf_hook()(f, fmt, args);
2732 } else {
2733 return vfprintf(f, fmt, args);
2734 }
2735 }
2736
2737 ATTRIBUTE_PRINTF(1, 2)
2738 JNIEXPORT int jio_printf(const char *fmt, ...) {
2739 int len;
2740 va_list args;
2741 va_start(args, fmt);
2742 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2743 va_end(args);
2744 return len;
2745 }
2746
2747 // HotSpot specific jio method
2748 void jio_print(const char* s, size_t len) {
2749 // Try to make this function as atomic as possible.
2750 if (Arguments::vfprintf_hook() != nullptr) {
2751 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2752 } else {
2753 // Make an unused local variable to avoid warning from gcc compiler.
2754 bool dummy = os::write(defaultStream::output_fd(), s, len);
2755 }
2756 }
2757
2758 } // Extern C
2759
2760 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2761
2762 // In most of the JVM thread support functions we need to access the
2763 // thread through a ThreadsListHandle to prevent it from exiting and
2764 // being reclaimed while we try to operate on it. The exceptions to this
2765 // rule are when operating on the current thread, or if the monitor of
2766 // the target java.lang.Thread is locked at the Java level - in both
2767 // cases the target cannot exit.
2768
2769 static void thread_entry(JavaThread* thread, TRAPS) {
2770 HandleMark hm(THREAD);
2771 Handle obj(THREAD, thread->threadObj());
2772 JavaValue result(T_VOID);
2773 JavaCalls::call_virtual(&result,
2774 obj,
2775 vmClasses::Thread_klass(),
2776 vmSymbols::run_method_name(),
2777 vmSymbols::void_method_signature(),
2778 THREAD);
2779 }
2780
2781
2782 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2783 #if INCLUDE_CDS
2784 if (CDSConfig::allow_only_single_java_thread()) {
2785 // During java -Xshare:dump, if we allow multiple Java threads to
2786 // execute in parallel, symbols and classes may be loaded in
2787 // random orders which will make the resulting CDS archive
2788 // non-deterministic.
2789 //
2790 // Lucikly, during java -Xshare:dump, it's important to run only
2791 // the code in the main Java thread (which is NOT started here) that
2792 // creates the module graph, etc. It's safe to not start the other
2793 // threads which are launched by class static initializers
2794 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2795 if (log_is_enabled(Info, aot)) {
2796 ResourceMark rm;
2797 oop t = JNIHandles::resolve_non_null(jthread);
2798 log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2799 }
2800 return;
2801 }
2802 #endif
2803 JavaThread *native_thread = nullptr;
2804
2805 // We cannot hold the Threads_lock when we throw an exception,
2806 // due to rank ordering issues. Example: we might need to grab the
2807 // Heap_lock while we construct the exception.
2808 bool throw_illegal_thread_state = false;
2809
2810 // We must release the Threads_lock before we can post a jvmti event
2811 // in Thread::start.
2812 {
2813 ConditionalMutexLocker throttle_ml(ThreadsLockThrottle_lock, UseThreadsLockThrottleLock);
2814 // Ensure that the C++ Thread and OSThread structures aren't freed before
2815 // we operate.
2816 MutexLocker ml(Threads_lock);
2817
2818 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2819 // re-starting an already started thread, so we should usually find
2820 // that the JavaThread is null. However for a JNI attached thread
2821 // there is a small window between the Thread object being created
2822 // (with its JavaThread set) and the update to its threadStatus, so we
2823 // have to check for this
2824 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) {
2825 throw_illegal_thread_state = true;
2826 } else {
2827 jlong size =
2828 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2829 // Allocate the C++ Thread structure and create the native thread. The
2830 // stack size retrieved from java is 64-bit signed, but the constructor takes
2831 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2832 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2833 // - Avoid passing negative values which would result in really large stacks.
2834 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2835 size_t sz = size > 0 ? (size_t) size : 0;
2836 native_thread = new JavaThread(&thread_entry, sz);
2837
2838 // At this point it may be possible that no osthread was created for the
2839 // JavaThread due to lack of memory. Check for this situation and throw
2840 // an exception if necessary. Eventually we may want to change this so
2841 // that we only grab the lock if the thread was created successfully -
2842 // then we can also do this check and throw the exception in the
2843 // JavaThread constructor.
2844 if (native_thread->osthread() != nullptr) {
2845 // Note: the current thread is not being used within "prepare".
2846 native_thread->prepare(jthread);
2847 }
2848 }
2849 }
2850
2851 if (throw_illegal_thread_state) {
2852 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2853 }
2854
2855 assert(native_thread != nullptr, "Starting null thread?");
2856
2857 if (native_thread->osthread() == nullptr) {
2858 ResourceMark rm(thread);
2859 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2860 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2861 // No one should hold a reference to the 'native_thread'.
2862 native_thread->smr_delete();
2863 if (JvmtiExport::should_post_resource_exhausted()) {
2864 JvmtiExport::post_resource_exhausted(
2865 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2866 os::native_thread_creation_failed_msg());
2867 }
2868 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2869 os::native_thread_creation_failed_msg());
2870 }
2871
2872 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2873
2874 Thread::start(native_thread);
2875
2876 JVM_END
2877
2878
2879 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2880 ThreadsListHandle tlh(thread);
2881 oop java_thread = nullptr;
2882 JavaThread* receiver = nullptr;
2883 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2884 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2885
2886 if (is_alive) {
2887 // jthread refers to a live JavaThread.
2888 Thread::set_priority(receiver, (ThreadPriority)prio);
2889 }
2890 // Implied else: If the JavaThread hasn't started yet, then the
2891 // priority set in the java.lang.Thread object above will be pushed
2892 // down when it does start.
2893 JVM_END
2894
2895
2896 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2897 HOTSPOT_THREAD_YIELD();
2898 os::naked_yield();
2899 JVM_END
2900
2901 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2902 if (nanos < 0) {
2903 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2904 }
2905
2906 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2907 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2908 }
2909
2910 // Save current thread state and restore it at the end of this block.
2911 // And set new thread state to SLEEPING.
2912 JavaThreadSleepState jtss(thread);
2913
2914 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2915
2916 if (nanos == 0) {
2917 os::naked_yield();
2918 } else {
2919 ThreadState old_state = thread->osthread()->get_state();
2920 thread->osthread()->set_state(SLEEPING);
2921 if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2922 // An asynchronous exception could have been thrown on
2923 // us while we were sleeping. We do not overwrite those.
2924 if (!HAS_PENDING_EXCEPTION) {
2925 HOTSPOT_THREAD_SLEEP_END(1);
2926 if (!thread->has_async_exception_condition()) {
2927 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2928 // to properly restore the thread state. That's likely wrong.
2929 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2930 }
2931 }
2932 }
2933 thread->osthread()->set_state(old_state);
2934 }
2935 HOTSPOT_THREAD_SLEEP_END(0);
2936 JVM_END
2937
2938 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2939 oop jthread = thread->threadObj();
2940 assert(jthread != nullptr, "no current carrier thread!");
2941 return JNIHandles::make_local(THREAD, jthread);
2942 JVM_END
2943
2944 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2945 oop theThread = thread->vthread();
2946 assert(theThread != (oop)nullptr, "no current thread!");
2947 return JNIHandles::make_local(THREAD, theThread);
2948 JVM_END
2949
2950 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2951 jobject theThread))
2952 oop threadObj = JNIHandles::resolve(theThread);
2953 thread->set_vthread(threadObj);
2954
2955 // Set _monitor_owner_id of new current Thread
2956 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2957
2958 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2959 JVM_END
2960
2961 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2962 return ThreadIdentifier::unsafe_offset();
2963 JVM_END
2964
2965 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
2966 ThreadsListHandle tlh(thread);
2967 JavaThread* receiver = nullptr;
2968 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2969 if (is_alive) {
2970 // jthread refers to a live JavaThread.
2971 receiver->interrupt();
2972 }
2973 JVM_END
2974
2975 // Return true iff the current thread has locked the object passed in
2976
2977 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2978 if (obj == nullptr) {
2979 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2980 }
2981 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2982 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2983 JVM_END
2984
2985 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2986 oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2987 return JNIHandles::make_local(THREAD, trace);
2988 JVM_END
2989
2990 JVM_ENTRY_PROF(jobject, JVM_CreateThreadSnapshot, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2991 #if INCLUDE_JVMTI
2992 oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2993 return JNIHandles::make_local(THREAD, snapshot);
2994 #else
2995 THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2996 #endif
2997 JVM_END
2998
2999 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3000 // We don't use a ThreadsListHandle here because the current thread
3001 // must be alive.
3002 oop java_thread = JNIHandles::resolve_non_null(jthread);
3003 JavaThread* thr = java_lang_Thread::thread(java_thread);
3004 if (thread == thr && !thr->has_attached_via_jni()) {
3005 // Thread naming is only supported for the current thread and
3006 // we don't set the name of an attached thread to avoid stepping
3007 // on other programs.
3008 ResourceMark rm(thread);
3009 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3010 os::set_native_thread_name(thread_name);
3011 }
3012 JVM_END
3013
3014 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3015 oop theCache = thread->scopedValueCache();
3016 return JNIHandles::make_local(THREAD, theCache);
3017 JVM_END
3018
3019 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3020 jobject theCache))
3021 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3022 thread->set_scopedValueCache(objs);
3023 JVM_END
3024
3025 // java.lang.Package ////////////////////////////////////////////////////////////////
3026
3027
3028 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3029 ResourceMark rm(THREAD);
3030 JvmtiVMObjectAllocEventCollector oam;
3031 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3032 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3033 return (jstring) JNIHandles::make_local(THREAD, result);
3034 JVM_END
3035
3036
3037 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3038 JvmtiVMObjectAllocEventCollector oam;
3039 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3040 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3041 JVM_END
3042
3043
3044 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3045
3046
3047 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3048 MonitorLocker ml(Heap_lock);
3049 oop ref = Universe::reference_pending_list();
3050 if (ref != nullptr) {
3051 Universe::clear_reference_pending_list();
3052 }
3053 return JNIHandles::make_local(THREAD, ref);
3054 JVM_END
3055
3056 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3057 MonitorLocker ml(Heap_lock);
3058 return Universe::has_reference_pending_list();
3059 JVM_END
3060
3061 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3062 MonitorLocker ml(Heap_lock);
3063 while (!Universe::has_reference_pending_list()) {
3064 ml.wait();
3065 }
3066 JVM_END
3067
3068 JVM_ENTRY_PROF(jobject, JVM_ReferenceGet, JVM_ReferenceGet(JNIEnv* env, jobject ref))
3069 oop ref_oop = JNIHandles::resolve_non_null(ref);
3070 // PhantomReference has its own implementation of get().
3071 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3072 oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3073 return JNIHandles::make_local(THREAD, referent);
3074 JVM_END
3075
3076 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3077 oop ref_oop = JNIHandles::resolve_non_null(ref);
3078 // PhantomReference has its own implementation of refersTo().
3079 // See: JVM_PhantomReferenceRefersTo
3080 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3081 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3082 return referent == JNIHandles::resolve(o);
3083 JVM_END
3084
3085 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3086 oop ref_oop = JNIHandles::resolve_non_null(ref);
3087 // FinalReference has it's own implementation of clear().
3088 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3089 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3090 // If the referent has already been cleared then done.
3091 // However, if the referent is dead but has not yet been cleared by
3092 // concurrent reference processing, it should NOT be cleared here.
3093 // Instead, clearing should be left to the GC. Clearing it here could
3094 // detectably lose an expected notification, which is impossible with
3095 // STW reference processing. The clearing in enqueue() doesn't have
3096 // this problem, since the enqueue covers the notification, but it's not
3097 // worth the effort to handle that case specially.
3098 return;
3099 }
3100 java_lang_ref_Reference::clear_referent(ref_oop);
3101 JVM_END
3102
3103
3104 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3105
3106
3107 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3108 oop ref_oop = JNIHandles::resolve_non_null(ref);
3109 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3110 return referent == JNIHandles::resolve(o);
3111 JVM_END
3112
3113
3114 // ObjectInputStream ///////////////////////////////////////////////////////////////
3115
3116 // Return the first user-defined class loader up the execution stack, or null
3117 // if only code from the bootstrap or platform class loader is on the stack.
3118
3119 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3120 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3121 InstanceKlass* ik = vfst.method()->method_holder();
3122 oop loader = ik->class_loader();
3123 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3124 return JNIHandles::make_local(THREAD, loader);
3125 }
3126 }
3127 return nullptr;
3128 JVM_END
3129
3130
3131 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3132
3133
3134 // resolve array handle and check arguments
3135 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3136 if (arr == nullptr) {
3137 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3138 }
3139 oop a = JNIHandles::resolve_non_null(arr);
3140 if (!a->is_array()) {
3141 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3142 } else if (type_array_only && !a->is_typeArray()) {
3143 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3144 }
3145 return arrayOop(a);
3146 }
3147
3148
3149 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3150 arrayOop a = check_array(env, arr, false, CHECK_0);
3151 return a->length();
3152 JVM_END
3153
3154
3155 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3156 JvmtiVMObjectAllocEventCollector oam;
3157 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3158 jvalue value;
3159 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3160 oop box = Reflection::box(&value, type, CHECK_NULL);
3161 return JNIHandles::make_local(THREAD, box);
3162 JVM_END
3163
3164
3165 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3166 jvalue value;
3167 value.i = 0; // to initialize value before getting used in CHECK
3168 arrayOop a = check_array(env, arr, true, CHECK_(value));
3169 assert(a->is_typeArray(), "just checking");
3170 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3171 BasicType wide_type = (BasicType) wCode;
3172 if (type != wide_type) {
3173 Reflection::widen(&value, type, wide_type, CHECK_(value));
3174 }
3175 return value;
3176 JVM_END
3177
3178
3179 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3180 arrayOop a = check_array(env, arr, false, CHECK);
3181 oop box = JNIHandles::resolve(val);
3182 jvalue value;
3183 value.i = 0; // to initialize value before getting used in CHECK
3184 BasicType value_type;
3185 if (a->is_objArray()) {
3186 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3187 value_type = Reflection::unbox_for_regular_object(box, &value);
3188 } else {
3189 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3190 }
3191 Reflection::array_set(&value, a, index, value_type, CHECK);
3192 JVM_END
3193
3194
3195 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3196 arrayOop a = check_array(env, arr, true, CHECK);
3197 assert(a->is_typeArray(), "just checking");
3198 BasicType value_type = (BasicType) vCode;
3199 Reflection::array_set(&v, a, index, value_type, CHECK);
3200 JVM_END
3201
3202
3203 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3204 JvmtiVMObjectAllocEventCollector oam;
3205 oop element_mirror = JNIHandles::resolve(eltClass);
3206 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3207 return JNIHandles::make_local(THREAD, result);
3208 JVM_END
3209
3210
3211 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3212 JvmtiVMObjectAllocEventCollector oam;
3213 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3214 oop element_mirror = JNIHandles::resolve(eltClass);
3215 assert(dim_array->is_typeArray(), "just checking");
3216 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3217 return JNIHandles::make_local(THREAD, result);
3218 JVM_END
3219
3220
3221 // Library support ///////////////////////////////////////////////////////////////////////////
3222
3223 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3224 return ZipLibrary::handle();
3225 JVM_END
3226
3227 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3228 //%note jvm_ct
3229 char ebuf[1024];
3230 void *load_result;
3231 {
3232 ThreadToNativeFromVM ttnfvm(thread);
3233 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3234 }
3235 if (load_result == nullptr) {
3236 if (throwException) {
3237 char msg[1024];
3238 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3239 // Since 'ebuf' may contain a string encoded using
3240 // platform encoding scheme, we need to pass
3241 // Exceptions::unsafe_to_utf8 to the new_exception method
3242 // as the last argument. See bug 6367357.
3243 Handle h_exception =
3244 Exceptions::new_exception(thread,
3245 vmSymbols::java_lang_UnsatisfiedLinkError(),
3246 msg, Exceptions::unsafe_to_utf8);
3247
3248 THROW_HANDLE_NULL(h_exception);
3249 } else {
3250 log_info(library)("Failed to load library %s", name);
3251 return load_result;
3252 }
3253 }
3254 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3255 return load_result;
3256 JVM_END
3257
3258
3259 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3260 os::dll_unload(handle);
3261 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3262 JVM_END
3263
3264
3265 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3266 void* find_result = os::dll_lookup(handle, name);
3267 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3268 find_result != nullptr ? "Found" : "Failed to find",
3269 name, p2i(handle));
3270 return find_result;
3271 JVM_END
3272
3273
3274 // JNI version ///////////////////////////////////////////////////////////////////////////////
3275
3276 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3277 return Threads::is_supported_jni_version_including_1_1(version);
3278 JVM_END
3279
3280
3281 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3282 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3283 JVM_END
3284
3285 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3286 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3287 JVM_END
3288
3289 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3290 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3291 JVM_END
3292
3293 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3294 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3295 JVM_END
3296
3297 // String support ///////////////////////////////////////////////////////////////////////////
3298
3299 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3300 JvmtiVMObjectAllocEventCollector oam;
3301 if (str == nullptr) return nullptr;
3302 oop string = JNIHandles::resolve_non_null(str);
3303 oop result = StringTable::intern(string, CHECK_NULL);
3304 return (jstring) JNIHandles::make_local(THREAD, result);
3305 JVM_END
3306
3307
3308 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3309
3310 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3311 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3312 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3313 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3314 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3315 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3316
3317
3318 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3319 VM_Exit::block_if_vm_exited();
3320 return new PlatformMutex();
3321 }
3322
3323
3324 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3325 VM_Exit::block_if_vm_exited();
3326 delete ((PlatformMutex*) mon);
3327 }
3328
3329
3330 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3331 VM_Exit::block_if_vm_exited();
3332 ((PlatformMutex*) mon)->lock();
3333 return 0;
3334 }
3335
3336
3337 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3338 VM_Exit::block_if_vm_exited();
3339 ((PlatformMutex*) mon)->unlock();
3340 }
3341
3342
3343 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3344
3345 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3346 Handle loader, jboolean throwError, TRAPS) {
3347 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3348
3349 // Check if we should initialize the class
3350 if (init && klass->is_instance_klass()) {
3351 klass->initialize(CHECK_NULL);
3352 }
3353 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3354 }
3355
3356
3357 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3358
3359 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3360 Handle method_handle;
3361 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3362 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3363 Handle receiver(THREAD, JNIHandles::resolve(obj));
3364 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3365 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3366 jobject res = JNIHandles::make_local(THREAD, result);
3367 if (JvmtiExport::should_post_vm_object_alloc()) {
3368 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3369 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3370 if (java_lang_Class::is_primitive(ret_type)) {
3371 // Only for primitive type vm allocates memory for java object.
3372 // See box() method.
3373 JvmtiExport::post_vm_object_alloc(thread, result);
3374 }
3375 }
3376 return res;
3377 } else {
3378 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3379 }
3380 JVM_END
3381
3382
3383 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3384 oop constructor_mirror = JNIHandles::resolve(c);
3385 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3386 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3387 jobject res = JNIHandles::make_local(THREAD, result);
3388 if (JvmtiExport::should_post_vm_object_alloc()) {
3389 JvmtiExport::post_vm_object_alloc(thread, result);
3390 }
3391 return res;
3392 JVM_END
3393
3394 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3395 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3396 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3397 JVM_END
3398
3399 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3400 jclass caller,
3401 jstring interfaceMethodName,
3402 jobject factoryType,
3403 jobject interfaceMethodType,
3404 jobject implementationMember,
3405 jobject dynamicMethodType,
3406 jclass lambdaProxyClass))
3407 #if INCLUDE_CDS
3408 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3409 return;
3410 }
3411
3412 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3413 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3414 if (caller_ik->is_hidden()) {
3415 // Hidden classes not of type lambda proxy classes are currently not being archived.
3416 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3417 // registered for archiving.
3418 return;
3419 }
3420 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass));
3421 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k);
3422 assert(lambda_ik->is_hidden(), "must be a hidden class");
3423 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3424
3425 Symbol* interface_method_name = nullptr;
3426 if (interfaceMethodName != nullptr) {
3427 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3428 }
3429 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3430 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3431
3432 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3433 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3434
3435 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3436 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3437 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3438
3439 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3440 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3441
3442 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3443 interface_method_type, m, dynamic_method_type, THREAD);
3444 #endif // INCLUDE_CDS
3445 JVM_END
3446
3447 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3448 jclass caller,
3449 jstring interfaceMethodName,
3450 jobject factoryType,
3451 jobject interfaceMethodType,
3452 jobject implementationMember,
3453 jobject dynamicMethodType))
3454 #if INCLUDE_CDS
3455
3456 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3457 implementationMember == nullptr || dynamicMethodType == nullptr) {
3458 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3459 }
3460
3461 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3462 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3463 if (!caller_ik->in_aot_cache()) {
3464 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3465 return nullptr;
3466 }
3467
3468 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3469 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3470 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3471
3472 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3473 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3474
3475 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3476 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3477 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3478
3479 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3480 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3481
3482 InstanceKlass* loaded_lambda =
3483 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3484 interface_method_type, m, dynamic_method_type,
3485 CHECK_(nullptr));
3486 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3487 #else
3488 return nullptr;
3489 #endif // INCLUDE_CDS
3490 JVM_END
3491
3492 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3493 if (CDSConfig::is_dumping_static_archive()) {
3494 // We do this so that the default CDS archive can be deterministic.
3495 const char* release = VM_Version::vm_release();
3496 const char* dbg_level = VM_Version::jdk_debug_level();
3497 const char* version = VM_Version::internal_vm_info_string();
3498 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3499 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3500 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3501 seed += (jlong)VM_Version::vm_major_version();
3502 seed += (jlong)VM_Version::vm_minor_version();
3503 seed += (jlong)VM_Version::vm_security_version();
3504 seed += (jlong)VM_Version::vm_patch_version();
3505 if (seed == 0) { // don't let this ever be zero.
3506 seed = 0x87654321;
3507 }
3508 log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3509 return seed;
3510 } else {
3511 return 0;
3512 }
3513 JVM_END
3514
3515 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3516 return CDSConfig::get_status();
3517 JVM_END
3518
3519 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3520 #if INCLUDE_CDS
3521 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3522 if (line != nullptr) {
3523 ResourceMark rm(THREAD);
3524 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3525 char* c_line = java_lang_String::as_utf8_string(h_line());
3526 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3527 // Note: LambdaFormInvokers::append take same format which is not
3528 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3529 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3530 }
3531 if (ClassListWriter::is_enabled()) {
3532 ClassListWriter w;
3533 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3534 }
3535 }
3536 #endif // INCLUDE_CDS
3537 JVM_END
3538
3539 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3540 #if INCLUDE_CDS
3541 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity");
3542
3543 ResourceMark rm(THREAD);
3544 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3545 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3546 oop loader_oop = JNIHandles::resolve(loader);
3547 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3548
3549 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3550 #endif // INCLUDE_CDS
3551 JVM_END
3552
3553 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3554 #if INCLUDE_CDS
3555 ResourceMark rm(THREAD);
3556 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3557 char* file_name = java_lang_String::as_utf8_string(file_handle());
3558 AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3559 #endif // INCLUDE_CDS
3560 JVM_END
3561
3562 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3563 #if INCLUDE_CDS
3564 ResourceMark rm(THREAD);
3565 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3566 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3567 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3568 #endif // INCLUDE_CDS
3569 JVM_END
3570
3571 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3572 #if INCLUDE_CDS
3573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3574 if (!k->is_instance_klass()) {
3575 return false;
3576 } else {
3577 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3578 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3579 // This class will be cached in AOT-initialized state. No need for init barriers.
3580 return false;
3581 } else {
3582 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3583 // must emit barriers to ensure class initialization during production run.
3584 ResourceMark rm(THREAD);
3585 log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3586 return true;
3587 }
3588 }
3589 #else
3590 return false;
3591 #endif // INCLUDE_CDS
3592 JVM_END
3593
3594 // Returns an array of all live Thread objects (VM internal JavaThreads,
3595 // jvmti agent threads, and JNI attaching threads are skipped)
3596 // See CR 6404306 regarding JNI attaching threads
3597 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3598 ResourceMark rm(THREAD);
3599 ThreadsListEnumerator tle(THREAD, false, false);
3600 JvmtiVMObjectAllocEventCollector oam;
3601
3602 int num_threads = tle.num_threads();
3603 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3604 objArrayHandle threads_ah(THREAD, r);
3605
3606 for (int i = 0; i < num_threads; i++) {
3607 Handle h = tle.get_threadObj(i);
3608 threads_ah->obj_at_put(i, h());
3609 }
3610
3611 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3612 JVM_END
3613
3614
3615 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3616 // Return StackTraceElement[][], each element is the stack trace of a thread in
3617 // the corresponding entry in the given threads array
3618 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3619 JvmtiVMObjectAllocEventCollector oam;
3620
3621 // Check if threads is null
3622 if (threads == nullptr) {
3623 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3624 }
3625
3626 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3627 objArrayHandle ah(THREAD, a);
3628 int num_threads = ah->length();
3629 // check if threads is non-empty array
3630 if (num_threads == 0) {
3631 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3632 }
3633
3634 // check if threads is not an array of objects of Thread class
3635 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3636 if (k != vmClasses::Thread_klass()) {
3637 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3638 }
3639
3640 ResourceMark rm(THREAD);
3641
3642 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3643 for (int i = 0; i < num_threads; i++) {
3644 oop thread_obj = ah->obj_at(i);
3645 instanceHandle h(THREAD, (instanceOop) thread_obj);
3646 thread_handle_array->append(h);
3647 }
3648
3649 // The JavaThread references in thread_handle_array are validated
3650 // in VM_ThreadDump::doit().
3651 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3652 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3653
3654 JVM_END
3655
3656 // JVM monitoring and management support
3657 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3658 return Management::get_jmm_interface(version);
3659 JVM_END
3660
3661 // com.sun.tools.attach.VirtualMachine agent properties support
3662 //
3663 // Initialize the agent properties with the properties maintained in the VM
3664 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3665 ResourceMark rm;
3666
3667 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3668
3669 PUTPROP(props, "sun.java.command", Arguments::java_command());
3670 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3671 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3672 return properties;
3673 JVM_END
3674
3675 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3676 {
3677 JvmtiVMObjectAllocEventCollector oam;
3678
3679 if (ofClass == nullptr) {
3680 return nullptr;
3681 }
3682 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3683 // Special handling for primitive objects
3684 if (java_lang_Class::is_primitive(mirror())) {
3685 return nullptr;
3686 }
3687 Klass* k = java_lang_Class::as_Klass(mirror());
3688 if (!k->is_instance_klass()) {
3689 return nullptr;
3690 }
3691 InstanceKlass* ik = InstanceKlass::cast(k);
3692 int encl_method_class_idx = ik->enclosing_method_class_index();
3693 if (encl_method_class_idx == 0) {
3694 return nullptr;
3695 }
3696 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3697 objArrayHandle dest(THREAD, dest_o);
3698 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3699 dest->obj_at_put(0, enc_k->java_mirror());
3700 int encl_method_method_idx = ik->enclosing_method_method_index();
3701 if (encl_method_method_idx != 0) {
3702 Symbol* sym = ik->constants()->symbol_at(
3703 extract_low_short_from_int(
3704 ik->constants()->name_and_type_at(encl_method_method_idx)));
3705 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3706 dest->obj_at_put(1, str());
3707 sym = ik->constants()->symbol_at(
3708 extract_high_short_from_int(
3709 ik->constants()->name_and_type_at(encl_method_method_idx)));
3710 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3711 dest->obj_at_put(2, str());
3712 }
3713 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3714 }
3715 JVM_END
3716
3717 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3718 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3719 ResourceMark rm(THREAD);
3720
3721 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3722 return nullptr;
3723 }
3724
3725 char** vm_flags = Arguments::jvm_flags_array();
3726 char** vm_args = Arguments::jvm_args_array();
3727 int num_flags = Arguments::num_jvm_flags();
3728 int num_args = Arguments::num_jvm_args();
3729
3730 InstanceKlass* ik = vmClasses::String_klass();
3731 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3732 objArrayHandle result_h(THREAD, r);
3733
3734 int index = 0;
3735 for (int j = 0; j < num_flags; j++, index++) {
3736 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3737 result_h->obj_at_put(index, h());
3738 }
3739 for (int i = 0; i < num_args; i++, index++) {
3740 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3741 result_h->obj_at_put(index, h());
3742 }
3743 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3744 JVM_END
3745
3746 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3747 return os::get_signal_number(name);
3748 JVM_END
3749
3750 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3751 #if INCLUDE_JVMTI
3752 if (!DoJVMTIVirtualThreadTransitions) {
3753 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3754 return;
3755 }
3756 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3757 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3758 } else {
3759 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3760 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3761 }
3762 #endif
3763 JVM_END
3764
3765 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3766 #if INCLUDE_JVMTI
3767 if (!DoJVMTIVirtualThreadTransitions) {
3768 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3769 return;
3770 }
3771 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3772 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3773 } else {
3774 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3775 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3776 }
3777 #endif
3778 JVM_END
3779
3780 // If notifications are disabled then just update the VTMS transition bit and return.
3781 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3782 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3783 #if INCLUDE_JVMTI
3784 if (!DoJVMTIVirtualThreadTransitions) {
3785 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3786 return;
3787 }
3788 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3789 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3790 } else {
3791 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3792 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3793 }
3794 #endif
3795 JVM_END
3796
3797 // If notifications are disabled then just update the VTMS transition bit and return.
3798 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3799 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3800 #if INCLUDE_JVMTI
3801 if (!DoJVMTIVirtualThreadTransitions) {
3802 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3803 return;
3804 }
3805 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3806 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3807 } else {
3808 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3809 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3810 }
3811 #endif
3812 JVM_END
3813
3814 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3815 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3816 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3817 #if INCLUDE_JVMTI
3818 if (!DoJVMTIVirtualThreadTransitions) {
3819 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3820 return;
3821 }
3822 assert(thread->is_disable_suspend() != (bool)enter,
3823 "nested or unbalanced monitor enter/exit is not allowed");
3824 thread->toggle_is_disable_suspend();
3825 #endif
3826 JVM_END
3827
3828 JVM_ENTRY(void, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3829 #if INCLUDE_JFR
3830 freeze_result result = THREAD->last_freeze_fail_result();
3831 assert(result != freeze_ok, "sanity check");
3832 EventVirtualThreadPinned event(UNTIMED);
3833 event.set_starttime(THREAD->last_freeze_fail_time());
3834 if (event.should_commit()) {
3835 ResourceMark rm(THREAD);
3836 const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3837 THREAD->post_vthread_pinned_event(&event, str, result);
3838 }
3839 #endif
3840 JVM_END
3841
3842 JVM_ENTRY(jobject, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3843 ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3844 assert(parkEvent != nullptr, "not initialized");
3845
3846 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3847 oop vthread_head = nullptr;
3848 while (true) {
3849 if (list_head.peek() != nullptr) {
3850 for (;;) {
3851 oop head = list_head.resolve();
3852 if (list_head.cmpxchg(head, nullptr) == head) {
3853 return JNIHandles::make_local(THREAD, head);
3854 }
3855 }
3856 }
3857 ThreadBlockInVM tbivm(THREAD);
3858 parkEvent->park();
3859 }
3860 JVM_END
3861 /*
3862 * Return the current class's class file version. The low order 16 bits of the
3863 * returned jint contain the class's major version. The high order 16 bits
3864 * contain the class's minor version.
3865 */
3866 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3867 oop mirror = JNIHandles::resolve_non_null(current);
3868 if (java_lang_Class::is_primitive(mirror)) {
3869 // return latest major version and minor version of 0.
3870 return JVM_CLASSFILE_MAJOR_VERSION;
3871 }
3872 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
3873
3874 Klass* c = java_lang_Class::as_Klass(mirror);
3875 assert(c->is_instance_klass(), "must be");
3876 InstanceKlass* ik = InstanceKlass::cast(c);
3877 return (ik->minor_version() << 16) | ik->major_version();
3878 JVM_END
3879
3880 /*
3881 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3882 * get the value will see a materialized value and not a scalar-replaced
3883 * null value.
3884 */
3885 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3886 JVM_EnsureMaterializedForStackWalk(env, value);
3887 JVM_END
3888
3889 /*
3890 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3891 */
3892 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3893 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3894 JVM_END
3895
3896 #define DO_COUNTERS(macro) \
3897 macro(JVM_CurrentTimeMillis) \
3898 macro(JVM_NanoTime) \
3899 macro(JVM_GetNanoTimeAdjustment) \
3900 macro(JVM_ArrayCopy) \
3901 macro(JVM_GetProperties) \
3902 macro(JVM_GetTemporaryDirectory) \
3903 macro(JVM_BeforeHalt) \
3904 macro(JVM_Halt) \
3905 macro(JVM_GC) \
3906 macro(JVM_MaxObjectInspectionAge) \
3907 macro(JVM_TotalMemory) \
3908 macro(JVM_FreeMemory) \
3909 macro(JVM_MaxMemory) \
3910 macro(JVM_ActiveProcessorCount) \
3911 macro(JVM_IsUseContainerSupport) \
3912 macro(JVM_FillInStackTrace) \
3913 macro(JVM_GetExtendedNPEMessage) \
3914 macro(JVM_InitStackTraceElementArray) \
3915 macro(JVM_InitStackTraceElement) \
3916 macro(JVM_ExpandStackFrameInfo) \
3917 macro(JVM_CallStackWalk) \
3918 macro(JVM_MoreStackWalk) \
3919 macro(JVM_SetStackWalkContinuation) \
3920 macro(JVM_IHashCode) \
3921 macro(JVM_MonitorWait) \
3922 macro(JVM_MonitorNotify) \
3923 macro(JVM_MonitorNotifyAll) \
3924 macro(JVM_Clone) \
3925 macro(JVM_ReportFinalizationComplete) \
3926 macro(JVM_IsFinalizationEnabled) \
3927 macro(JVM_RegisterContinuationMethods) \
3928 macro(JVM_NativePath) \
3929 macro(JVM_GetCallerClass) \
3930 macro(JVM_FindPrimitiveClass) \
3931 macro(JVM_FindClassFromBootLoader) \
3932 macro(JVM_FindClassFromCaller) \
3933 macro(JVM_FindClassFromClass) \
3934 macro(JVM_DefineClass) \
3935 macro(JVM_LookupDefineClass) \
3936 macro(JVM_DefineClassWithSource) \
3937 macro(JVM_FindLoadedClass) \
3938 macro(JVM_DefineModule) \
3939 macro(JVM_SetBootLoaderUnnamedModule) \
3940 macro(JVM_AddModuleExports) \
3941 macro(JVM_AddModuleExportsToAllUnnamed) \
3942 macro(JVM_AddModuleExportsToAll) \
3943 macro(JVM_AddReadsModule) \
3944 macro(JVM_DefineArchivedModules) \
3945 macro(JVM_InitClassName) \
3946 macro(JVM_GetClassInterfaces) \
3947 macro(JVM_IsInterface) \
3948 macro(JVM_IsHiddenClass) \
3949 macro(JVM_FindScopedValueBindings) \
3950 macro(JVM_GetDeclaredClasses) \
3951 macro(JVM_GetDeclaringClass) \
3952 macro(JVM_GetSimpleBinaryName) \
3953 macro(JVM_GetClassSignature) \
3954 macro(JVM_GetClassAnnotations) \
3955 macro(JVM_GetClassTypeAnnotations) \
3956 macro(JVM_GetMethodTypeAnnotations) \
3957 macro(JVM_GetFieldTypeAnnotations) \
3958 macro(JVM_GetMethodParameters) \
3959 macro(JVM_GetClassDeclaredFields) \
3960 macro(JVM_IsRecord) \
3961 macro(JVM_GetRecordComponents) \
3962 macro(JVM_GetClassDeclaredMethods) \
3963 macro(JVM_GetClassDeclaredConstructors) \
3964 macro(JVM_AreNestMates) \
3965 macro(JVM_GetNestHost) \
3966 macro(JVM_GetNestMembers) \
3967 macro(JVM_GetPermittedSubclasses) \
3968 macro(JVM_GetClassConstantPool) \
3969 macro(JVM_ConstantPoolGetSize) \
3970 macro(JVM_ConstantPoolGetClassAt) \
3971 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3972 macro(JVM_ConstantPoolGetMethodAt) \
3973 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3974 macro(JVM_ConstantPoolGetFieldAt) \
3975 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3976 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3977 macro(JVM_ConstantPoolGetClassRefIndexAt) \
3978 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3979 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3980 macro(JVM_ConstantPoolGetIntAt) \
3981 macro(JVM_ConstantPoolGetLongAt) \
3982 macro(JVM_ConstantPoolGetFloatAt) \
3983 macro(JVM_ConstantPoolGetDoubleAt) \
3984 macro(JVM_ConstantPoolGetStringAt) \
3985 macro(JVM_ConstantPoolGetUTF8At) \
3986 macro(JVM_ConstantPoolGetTagAt) \
3987 macro(JVM_DesiredAssertionStatus) \
3988 macro(JVM_AssertionStatusDirectives) \
3989 macro(JVM_GetClassNameUTF) \
3990 macro(JVM_GetClassCPTypes) \
3991 macro(JVM_GetClassCPEntriesCount) \
3992 macro(JVM_GetClassFieldsCount) \
3993 macro(JVM_GetClassMethodsCount) \
3994 macro(JVM_GetMethodIxExceptionIndexes) \
3995 macro(JVM_GetMethodIxExceptionsCount) \
3996 macro(JVM_GetMethodIxByteCode) \
3997 macro(JVM_GetMethodIxByteCodeLength) \
3998 macro(JVM_GetMethodIxExceptionTableEntry) \
3999 macro(JVM_GetMethodIxExceptionTableLength) \
4000 macro(JVM_GetMethodIxModifiers) \
4001 macro(JVM_GetFieldIxModifiers) \
4002 macro(JVM_GetMethodIxLocalsCount) \
4003 macro(JVM_GetMethodIxArgsSize) \
4004 macro(JVM_GetMethodIxMaxStack) \
4005 macro(JVM_IsConstructorIx) \
4006 macro(JVM_IsVMGeneratedMethodIx) \
4007 macro(JVM_GetMethodIxNameUTF) \
4008 macro(JVM_GetMethodIxSignatureUTF) \
4009 macro(JVM_GetCPFieldNameUTF) \
4010 macro(JVM_GetCPMethodNameUTF) \
4011 macro(JVM_GetCPMethodSignatureUTF) \
4012 macro(JVM_GetCPFieldSignatureUTF) \
4013 macro(JVM_GetCPClassNameUTF) \
4014 macro(JVM_GetCPFieldClassNameUTF) \
4015 macro(JVM_GetCPMethodClassNameUTF) \
4016 macro(JVM_GetCPFieldModifiers) \
4017 macro(JVM_GetCPMethodModifiers) \
4018 macro(JVM_ReleaseUTF) \
4019 macro(JVM_IsSameClassPackage) \
4020 macro(JVM_StartThread) \
4021 macro(JVM_SetThreadPriority) \
4022 macro(JVM_Yield) \
4023 macro(JVM_SleepNanos) \
4024 macro(JVM_CurrentCarrierThread) \
4025 macro(JVM_CurrentThread) \
4026 macro(JVM_SetCurrentThread) \
4027 macro(JVM_GetNextThreadIdOffset) \
4028 macro(JVM_Interrupt) \
4029 macro(JVM_HoldsLock) \
4030 macro(JVM_GetStackTrace) \
4031 macro(JVM_CreateThreadSnapshot) \
4032 macro(JVM_SetNativeThreadName) \
4033 macro(JVM_ScopedValueCache) \
4034 macro(JVM_SetScopedValueCache) \
4035 macro(JVM_GetSystemPackage) \
4036 macro(JVM_GetSystemPackages) \
4037 macro(JVM_GetAndClearReferencePendingList) \
4038 macro(JVM_HasReferencePendingList) \
4039 macro(JVM_WaitForReferencePendingList) \
4040 macro(JVM_ReferenceGet) \
4041 macro(JVM_ReferenceRefersTo) \
4042 macro(JVM_ReferenceClear) \
4043 macro(JVM_PhantomReferenceRefersTo) \
4044 macro(JVM_LatestUserDefinedLoader) \
4045 macro(JVM_GetArrayLength) \
4046 macro(JVM_GetArrayElement) \
4047 macro(JVM_GetPrimitiveArrayElement) \
4048 macro(JVM_SetArrayElement) \
4049 macro(JVM_SetPrimitiveArrayElement) \
4050 macro(JVM_NewArray) \
4051 macro(JVM_NewMultiArray) \
4052 macro(JVM_LoadZipLibrary) \
4053 macro(JVM_LoadLibrary) \
4054 macro(JVM_UnloadLibrary) \
4055 macro(JVM_FindLibraryEntry) \
4056 macro(JVM_IsSupportedJNIVersion) \
4057 macro(JVM_IsPreviewEnabled) \
4058 macro(JVM_IsContinuationsSupported) \
4059 macro(JVM_IsForeignLinkerSupported) \
4060 macro(JVM_InternString) \
4061 macro(JVM_InvokeMethod) \
4062 macro(JVM_NewInstanceFromConstructor) \
4063 macro(JVM_InitializeFromArchive) \
4064 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4065 macro(JVM_LookupLambdaProxyClassFromArchive) \
4066 macro(JVM_GetRandomSeedForDumping) \
4067 macro(JVM_LogLambdaFormInvoker) \
4068 macro(JVM_LogDynamicProxy) \
4069 macro(JVM_DumpClassListToFile) \
4070 macro(JVM_DumpDynamicArchive) \
4071 macro(JVM_GetAllThreads) \
4072 macro(JVM_DumpThreads) \
4073 macro(JVM_GetManagement) \
4074 macro(JVM_InitAgentProperties) \
4075 macro(JVM_GetEnclosingMethodInfo) \
4076 macro(JVM_GetVmArguments) \
4077 macro(JVM_FindSignal) \
4078 macro(JVM_VirtualThreadStart) \
4079 macro(JVM_VirtualThreadEnd) \
4080 macro(JVM_VirtualThreadMount) \
4081 macro(JVM_VirtualThreadUnmount) \
4082 macro(JVM_GetClassFileVersion) \
4083 macro(JVM_EnsureMaterializedForStackWalk_func) \
4084 macro(JVM_PrintWarningAtDynamicAgentLoad)
4085
4086 #define INIT_COUNTER(name) \
4087 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4088 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4089
4090 void perf_jvm_init() {
4091 if (ProfileVMCalls && UsePerfData) {
4092 EXCEPTION_MARK;
4093
4094 DO_COUNTERS(INIT_COUNTER)
4095
4096 if (HAS_PENDING_EXCEPTION) {
4097 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4098 }
4099 }
4100 }
4101
4102 #undef INIT_COUNTER
4103
4104 #define PRINT_COUNTER(name) {\
4105 jlong count = _perf_##name##_count->get_value(); \
4106 if (count > 0) { \
4107 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
4108 #name, \
4109 _perf_##name##_timer->elapsed_counter_value_us(), \
4110 _perf_##name##_timer->thread_counter_value_us(), count); \
4111 }}
4112
4113 void perf_jvm_print_on(outputStream* st) {
4114 if (ProfileVMCalls && UsePerfData) {
4115 DO_COUNTERS(PRINT_COUNTER)
4116 } else {
4117 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4118 }
4119 }
4120
4121 #undef PRINT_COUNTER