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/cdsConfig.hpp"
28 #include "cds/classListParser.hpp"
29 #include "cds/classListWriter.hpp"
30 #include "cds/dynamicArchive.hpp"
31 #include "cds/heapShared.hpp"
32 #include "cds/lambdaFormInvokers.hpp"
33 #include "cds/lambdaProxyClassDictionary.hpp"
34 #include "classfile/classFileStream.hpp"
35 #include "classfile/classLoader.inline.hpp"
36 #include "classfile/classLoaderData.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/recordComponent.hpp"
66 #include "oops/objArrayKlass.hpp"
67 #include "oops/objArrayOop.inline.hpp"
68 #include "oops/oop.inline.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/globals_extension.hpp"
78 #include "runtime/handles.inline.hpp"
79 #include "runtime/init.hpp"
80 #include "runtime/interfaceSupport.inline.hpp"
81 #include "runtime/deoptimization.hpp"
82 #include "runtime/handshake.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/vmOperations.hpp"
97 #include "runtime/vm_version.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 MetaspaceShared::is_recording_preimage_static_archive();
236 #else
237 return JNI_FALSE;
238 #endif // INCLUDE_CDS
239 JVM_END
240
241 JVM_ENTRY_PROF(void, JVM_AOTEndTraining, JVM_AOTEndTraining(JNIEnv *env))
242 #if INCLUDE_CDS
243 if (MetaspaceShared::is_recording_preimage_static_archive()) {
244 MetaspaceShared::preload_and_dump(THREAD);
245 }
246 #endif // INCLUDE_CDS
247 JVM_END
248
249 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
250 return os::javaTimeMillis();
251 JVM_END
252
253 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
254 return os::javaTimeNanos();
255 JVM_END
256
257 // The function below is actually exposed by jdk.internal.misc.VM and not
258 // java.lang.System, but we choose to keep it here so that it stays next
259 // to JVM_CurrentTimeMillis and JVM_NanoTime
260
261 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
262 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
263
264 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
265 jlong seconds;
266 jlong nanos;
267
268 os::javaTimeSystemUTC(seconds, nanos);
269
270 // We're going to verify that the result can fit in a long.
271 // For that we need the difference in seconds between 'seconds'
272 // and 'offset_secs' to be such that:
273 // |seconds - offset_secs| < (2^63/10^9)
274 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
275 // which makes |seconds - offset_secs| < 2^33
276 // and we will prefer +/- 2^32 as the maximum acceptable diff
277 // as 2^32 has a more natural feel than 2^33...
278 //
279 // So if |seconds - offset_secs| >= 2^32 - we return a special
280 // sentinel value (-1) which the caller should take as an
281 // exception value indicating that the offset given to us is
282 // too far from range of the current time - leading to too big
283 // a nano adjustment. The caller is expected to recover by
284 // computing a more accurate offset and calling this method
285 // again. (For the record 2^32 secs is ~136 years, so that
286 // should rarely happen)
287 //
288 jlong diff = seconds - offset_secs;
289 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
290 return -1; // sentinel value: the offset is too far off the target
291 }
292
293 // return the adjustment. If you compute a time by adding
294 // this number of nanoseconds along with the number of seconds
295 // in the offset you should get the current UTC time.
296 return (diff * (jlong)1000000000) + nanos;
297 JVM_END
298
299 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
300 jobject dst, jint dst_pos, jint length))
301 // Check if we have null pointers
302 if (src == nullptr || dst == nullptr) {
303 THROW(vmSymbols::java_lang_NullPointerException());
304 }
305 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
306 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
307 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
308 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
309 // Do copy
310 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
311 JVM_END
312
313
314 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
315 JavaValue r(T_OBJECT);
316 // public synchronized Object put(Object key, Object value);
317 HandleMark hm(THREAD);
318 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
319 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
320 JavaCalls::call_virtual(&r,
321 props,
322 vmClasses::Properties_klass(),
323 vmSymbols::put_name(),
324 vmSymbols::object_object_object_signature(),
325 key_str,
326 value_str,
327 THREAD);
328 }
329
330
331 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
332
333 /*
334 * Return all of the system properties in a Java String array with alternating
335 * names and values from the jvm SystemProperty.
336 * Which includes some internal and all commandline -D defined properties.
337 */
338 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
339 ResourceMark rm(THREAD);
340 HandleMark hm(THREAD);
341 int ndx = 0;
342 int fixedCount = 2;
343
344 SystemProperty* p = Arguments::system_properties();
345 int count = Arguments::PropertyList_count(p);
346
347 // Allocate result String array
348 InstanceKlass* ik = vmClasses::String_klass();
349 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
350 objArrayHandle result_h(THREAD, r);
351
352 while (p != nullptr) {
353 const char * key = p->key();
354 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
355 const char * value = p->value();
356 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
357 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
358 result_h->obj_at_put(ndx * 2, key_str());
359 result_h->obj_at_put(ndx * 2 + 1, value_str());
360 ndx++;
361 }
362 p = p->next();
363 }
364
365 // Convert the -XX:MaxDirectMemorySize= command line flag
366 // to the sun.nio.MaxDirectMemorySize property.
367 // Do this after setting user properties to prevent people
368 // from setting the value with a -D option, as requested.
369 // Leave empty if not supplied
370 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
371 char as_chars[256];
372 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
373 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
374 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
375 result_h->obj_at_put(ndx * 2, key_str());
376 result_h->obj_at_put(ndx * 2 + 1, value_str());
377 ndx++;
378 }
379
380 // JVM monitoring and management support
381 // Add the sun.management.compiler property for the compiler's name
382 {
383 #undef CSIZE
384 #if defined(_LP64)
385 #define CSIZE "64-Bit "
386 #else
387 #define CSIZE
388 #endif // 64bit
389
390 #if COMPILER1_AND_COMPILER2
391 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
392 #else
393 #if defined(COMPILER1)
394 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
395 #elif defined(COMPILER2)
396 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
397 #elif INCLUDE_JVMCI
398 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
399 #else
400 const char* compiler_name = "";
401 #endif // compilers
402 #endif // COMPILER1_AND_COMPILER2
403
404 if (*compiler_name != '\0' &&
405 (Arguments::mode() != Arguments::_int)) {
406 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
407 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
408 result_h->obj_at_put(ndx * 2, key_str());
409 result_h->obj_at_put(ndx * 2 + 1, value_str());
410 ndx++;
411 }
412 }
413
414 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
415 JVM_END
416
417
418 /*
419 * Return the temporary directory that the VM uses for the attach
420 * and perf data files.
421 *
422 * It is important that this directory is well-known and the
423 * same for all VM instances. It cannot be affected by configuration
424 * variables such as java.io.tmpdir.
425 */
426 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
427 HandleMark hm(THREAD);
428 const char* temp_dir = os::get_temp_directory();
429 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
430 return (jstring) JNIHandles::make_local(THREAD, h());
431 JVM_END
432
433
434 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
435
436 extern volatile jint vm_created;
437
438 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
439 EventShutdown event;
440 if (event.should_commit()) {
441 event.set_reason("Shutdown requested from Java");
442 event.commit();
443 }
444 JVM_END
445
446
447 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
448 before_exit(thread, true);
449 vm_exit(code);
450 JVM_END
451
452
453 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
454 if (!DisableExplicitGC) {
455 EventSystemGC event;
456 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
457 Universe::heap()->collect(GCCause::_java_lang_system_gc);
458 event.commit();
459 }
460 JVM_END
461
462
463 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
464 return Universe::heap()->millis_since_last_whole_heap_examined();
465 JVM_END
466
467
468 static inline jlong convert_size_t_to_jlong(size_t val) {
469 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
470 NOT_LP64 (return (jlong)val;)
471 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
472 }
473
474 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
475 size_t n = Universe::heap()->capacity();
476 return convert_size_t_to_jlong(n);
477 JVM_END
478
479
480 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
481 size_t n = Universe::heap()->unused();
482 return convert_size_t_to_jlong(n);
483 JVM_END
484
485
486 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
487 size_t n = Universe::heap()->max_capacity();
488 return convert_size_t_to_jlong(n);
489 JVM_END
490
491
492 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
493 return os::active_processor_count();
494 JVM_END
495
496 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
497 #ifdef LINUX
498 if (UseContainerSupport) {
499 return JNI_TRUE;
500 }
501 #endif
502 return JNI_FALSE;
503 JVM_END
504
505 JVM_LEAF(jboolean, JVM_IsContainerized(void))
506 #ifdef LINUX
507 if (OSContainer::is_containerized()) {
508 return JNI_TRUE;
509 }
510 #endif
511 return JNI_FALSE;
512 JVM_END
513
514 // java.lang.Throwable //////////////////////////////////////////////////////
515
516 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
517 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
518 java_lang_Throwable::fill_in_stack_trace(exception);
519 JVM_END
520
521 // java.lang.NullPointerException ///////////////////////////////////////////
522
523 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
524 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
525
526 oop exc = JNIHandles::resolve_non_null(throwable);
527
528 Method* method;
529 int bci;
530 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
531 return nullptr;
532 }
533 if (method->is_native()) {
534 return nullptr;
535 }
536
537 stringStream ss;
538 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
539 if (ok) {
540 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
541 return (jstring) JNIHandles::make_local(THREAD, result);
542 } else {
543 return nullptr;
544 }
545 JVM_END
546
547 // java.lang.StackTraceElement //////////////////////////////////////////////
548
549
550 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
551 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
552 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
553 objArrayHandle stack_trace(THREAD, st);
554 // Fill in the allocated stack trace
555 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
556 JVM_END
557
558
559 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
560 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
561 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
562 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
563 JVM_END
564
565
566 // java.lang.StackWalker //////////////////////////////////////////////////////
567 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
568 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
569
570 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
571 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
572 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
573 if (!have_name) {
574 oop name = StringTable::intern(method->name(), CHECK);
575 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
576 }
577 if (!have_type) {
578 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
579 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
580 }
581 JVM_END
582
583 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
584 jint skip_frames, jobject contScope, jobject cont,
585 jint buffer_size, jint start_index, jobjectArray frames))
586 if (!thread->has_last_Java_frame()) {
587 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
588 }
589
590 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
591 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
592 Handle cont_h(THREAD, JNIHandles::resolve(cont));
593 // frames array is a ClassFrameInfo[] array when only getting caller reference,
594 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
595 // be null.
596 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
597 objArrayHandle frames_array_h(THREAD, fa);
598
599 if (frames_array_h->length() < buffer_size) {
600 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
601 }
602
603 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
604 buffer_size, start_index, frames_array_h, CHECK_NULL);
605 return JNIHandles::make_local(THREAD, result);
606 JVM_END
607
608
609 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
610 jint last_batch_count, jint buffer_size, jint start_index,
611 jobjectArray frames))
612 // frames array is a ClassFrameInfo[] array when only getting caller reference,
613 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
614 // be null.
615 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
616 objArrayHandle frames_array_h(THREAD, fa);
617
618 if (frames_array_h->length() < buffer_size) {
619 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
620 }
621
622 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
623 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
624 start_index, frames_array_h, THREAD);
625 JVM_END
626
627 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
628 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
629 objArrayHandle frames_array_h(THREAD, fa);
630 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
631 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
632
633 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
634 JVM_END
635
636 // java.lang.Object ///////////////////////////////////////////////
637
638
639 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
640 // as implemented in the classic virtual machine; return 0 if object is null
641 return handle == nullptr ? 0 :
642 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
643 JVM_END
644
645
646 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
647 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
648 ObjectSynchronizer::wait(obj, ms, CHECK);
649 JVM_END
650
651
652 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
653 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
654 ObjectSynchronizer::notify(obj, CHECK);
655 JVM_END
656
657
658 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
659 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
660 ObjectSynchronizer::notifyall(obj, CHECK);
661 JVM_END
662
663
664 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
665 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
666 Klass* klass = obj->klass();
667 JvmtiVMObjectAllocEventCollector oam;
668
669 #ifdef ASSERT
670 // Just checking that the cloneable flag is set correct
671 if (obj->is_array()) {
672 guarantee(klass->is_cloneable(), "all arrays are cloneable");
673 } else {
674 guarantee(obj->is_instance(), "should be instanceOop");
675 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
676 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
677 }
678 #endif
679
680 // Check if class of obj supports the Cloneable interface.
681 // All arrays are considered to be cloneable (See JLS 20.1.5).
682 // All j.l.r.Reference classes are considered non-cloneable.
683 if (!klass->is_cloneable() ||
684 (klass->is_instance_klass() &&
685 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
686 ResourceMark rm(THREAD);
687 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
688 }
689
690 // Make shallow object copy
691 const size_t size = obj->size();
692 oop new_obj_oop = nullptr;
693 if (obj->is_array()) {
694 const int length = ((arrayOop)obj())->length();
695 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
696 /* do_zero */ true, CHECK_NULL);
697 } else {
698 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
699 }
700
701 HeapAccess<>::clone(obj(), new_obj_oop, size);
702
703 Handle new_obj(THREAD, new_obj_oop);
704 // Caution: this involves a java upcall, so the clone should be
705 // "gc-robust" by this stage.
706 if (klass->has_finalizer()) {
707 assert(obj->is_instance(), "should be instanceOop");
708 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
709 new_obj = Handle(THREAD, new_obj_oop);
710 }
711
712 return JNIHandles::make_local(THREAD, new_obj());
713 JVM_END
714
715 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
716
717 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
718 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
719 JVM_END
720
721 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
722 return InstanceKlass::is_finalization_enabled();
723 JVM_END
724
725 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
726
727 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
728 CONT_RegisterNativeMethods(env, cls);
729 JVM_END
730
731 // java.io.File ///////////////////////////////////////////////////////////////
732
733 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
734 return os::native_path(path);
735 JVM_END
736
737
738 // Misc. class handling ///////////////////////////////////////////////////////////
739
740
741 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
742 // Getting the class of the caller frame.
743 //
744 // The call stack at this point looks something like this:
745 //
746 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
747 // [1] [ @CallerSensitive API.method ]
748 // [.] [ (skipped intermediate frames) ]
749 // [n] [ caller ]
750 vframeStream vfst(thread);
751 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
752 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
753 Method* m = vfst.method();
754 assert(m != nullptr, "sanity");
755 switch (n) {
756 case 0:
757 // This must only be called from Reflection.getCallerClass
758 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
759 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
760 }
761 // fall-through
762 case 1:
763 // Frame 0 and 1 must be caller sensitive.
764 if (!m->caller_sensitive()) {
765 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
766 }
767 break;
768 default:
769 if (!m->is_ignored_by_security_stack_walk()) {
770 // We have reached the desired frame; return the holder class.
771 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
772 }
773 break;
774 }
775 }
776 return nullptr;
777 JVM_END
778
779
780 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
781 oop mirror = nullptr;
782 BasicType t = name2type(utf);
783 if (t != T_ILLEGAL && !is_reference_type(t)) {
784 mirror = Universe::java_mirror(t);
785 }
786 if (mirror == nullptr) {
787 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
788 } else {
789 return (jclass) JNIHandles::make_local(THREAD, mirror);
790 }
791 JVM_END
792
793
794 // Returns a class loaded by the bootstrap class loader; or null
795 // if not found. ClassNotFoundException is not thrown.
796 // FindClassFromBootLoader is exported to the launcher for windows.
797 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
798 // Java libraries should ensure that name is never null or illegal.
799 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
800 // It's impossible to create this class; the name cannot fit
801 // into the constant pool.
802 return nullptr;
803 }
804 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
805
806 TempNewSymbol h_name = SymbolTable::new_symbol(name);
807 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
808 if (k == nullptr) {
809 return nullptr;
810 }
811
812 if (log_is_enabled(Debug, class, resolve)) {
813 trace_class_resolution(k);
814 }
815 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
816 JVM_END
817
818 // Find a class with this name in this loader, using the caller's protection domain.
819 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
820 jboolean init, jobject loader,
821 jclass caller))
822 TempNewSymbol h_name =
823 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
824 CHECK_NULL);
825
826 oop loader_oop = JNIHandles::resolve(loader);
827 oop from_class = JNIHandles::resolve(caller);
828 Handle h_loader(THREAD, loader_oop);
829
830 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
831 false, THREAD);
832
833 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
834 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
835 }
836 return result;
837 JVM_END
838
839 // Currently only called from the old verifier.
840 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
841 jboolean init, jclass from))
842 TempNewSymbol h_name =
843 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
844 CHECK_NULL);
845 oop from_class_oop = JNIHandles::resolve(from);
846 Klass* from_class = (from_class_oop == nullptr)
847 ? (Klass*)nullptr
848 : java_lang_Class::as_Klass(from_class_oop);
849 oop class_loader = nullptr;
850 if (from_class != nullptr) {
851 class_loader = from_class->class_loader();
852 }
853 Handle h_loader(THREAD, class_loader);
854 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
855
856 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
857 // this function is generally only used for class loading during verification.
858 ResourceMark rm;
859 oop from_mirror = JNIHandles::resolve_non_null(from);
860 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
861 const char * from_name = from_class->external_name();
862
863 oop mirror = JNIHandles::resolve_non_null(result);
864 Klass* to_class = java_lang_Class::as_Klass(mirror);
865 const char * to = to_class->external_name();
866 log_debug(class, resolve)("%s %s (verification)", from_name, to);
867 }
868
869 return result;
870 JVM_END
871
872 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
873 static jclass jvm_define_class_common(const char *name,
874 jobject loader, const jbyte *buf,
875 jsize len, jobject pd, const char *source,
876 TRAPS) {
877 if (source == nullptr) source = "__JVM_DefineClass__";
878
879 JavaThread* jt = THREAD;
880
881 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
882 ClassLoader::perf_define_appclass_selftime(),
883 ClassLoader::perf_define_appclasses(),
884 jt->get_thread_stat()->perf_recursion_counts_addr(),
885 jt->get_thread_stat()->perf_timers_addr(),
886 PerfClassTraceTime::DEFINE_CLASS);
887
888 if (UsePerfData) {
889 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
890 }
891
892 // Class resolution will get the class name from the .class stream if the name is null.
893 TempNewSymbol class_name = name == nullptr ? nullptr :
894 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
895 CHECK_NULL);
896
897 ResourceMark rm(THREAD);
898 ClassFileStream st((u1*)buf, len, source);
899 Handle class_loader (THREAD, JNIHandles::resolve(loader));
900 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
901 ClassLoadInfo cl_info(protection_domain);
902 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
903 class_loader,
904 cl_info,
905 CHECK_NULL);
906
907 if (log_is_enabled(Debug, class, resolve)) {
908 trace_class_resolution(k);
909 }
910
911 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
912 }
913
914 enum {
915 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
916 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
917 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
918 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
919 };
920
921 /*
922 * Define a class with the specified flags that indicates if it's a nestmate,
923 * hidden, or strongly referenced from class loader.
924 */
925 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
926 const jbyte *buf, jsize len, jobject pd,
927 jboolean init, int flags, jobject classData, TRAPS) {
928 ResourceMark rm(THREAD);
929
930 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup));
931 // Lookup class must be a non-null instance
932 if (lookup_k == nullptr) {
933 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
934 }
935 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass");
936
937 Handle class_loader (THREAD, lookup_k->class_loader());
938
939 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
940 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
941 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
942 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
943
944 InstanceKlass* host_class = nullptr;
945 if (is_nestmate) {
946 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL);
947 }
948
949 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
950 name,
951 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
952 is_nestmate ? host_class->external_name() : "",
953 is_hidden ? "hidden" : "not hidden",
954 is_strong ? "strong" : "weak",
955 vm_annotations ? "with vm annotations" : "without vm annotation");
956
957 if (!is_hidden) {
958 // classData is only applicable for hidden classes
959 if (classData != nullptr) {
960 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
961 }
962 if (is_nestmate) {
963 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
964 }
965 if (!is_strong) {
966 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
967 }
968 if (vm_annotations) {
969 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
970 }
971 if (flags != STRONG_LOADER_LINK) {
972 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
973 err_msg("invalid flag 0x%x", flags));
974 }
975 }
976
977 // Class resolution will get the class name from the .class stream if the name is null.
978 TempNewSymbol class_name = name == nullptr ? nullptr :
979 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
980 CHECK_NULL);
981
982 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
983 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
984 ClassFileStream st((u1*)buf, len, source);
985
986 InstanceKlass* ik = nullptr;
987 if (!is_hidden) {
988 ClassLoadInfo cl_info(protection_domain);
989 ik = SystemDictionary::resolve_from_stream(&st, class_name,
990 class_loader,
991 cl_info,
992 CHECK_NULL);
993
994 if (log_is_enabled(Debug, class, resolve)) {
995 trace_class_resolution(ik);
996 }
997 } else { // hidden
998 Handle classData_h(THREAD, JNIHandles::resolve(classData));
999 ClassLoadInfo cl_info(protection_domain,
1000 host_class,
1001 classData_h,
1002 is_hidden,
1003 is_strong,
1004 vm_annotations);
1005 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1006 class_loader,
1007 cl_info,
1008 CHECK_NULL);
1009
1010 // The hidden class loader data has been artificially been kept alive to
1011 // this point. The mirror and any instances of this class have to keep
1012 // it alive afterwards.
1013 ik->class_loader_data()->dec_keep_alive_ref_count();
1014
1015 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1016 ModuleEntry* module = ik->module();
1017 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1018 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1019 module_name,
1020 ik->external_name(),
1021 host_class->external_name(),
1022 ik->is_hidden() ? "is hidden" : "is not hidden");
1023 }
1024 }
1025
1026 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1027 // non-hidden class or nestmate class must be in the same package as the Lookup class
1028 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1029 }
1030
1031 if (init) {
1032 ik->initialize(CHECK_NULL);
1033 } else {
1034 ik->link_class(CHECK_NULL);
1035 }
1036
1037 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1038 }
1039
1040 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1041 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1042 JVM_END
1043
1044 /*
1045 * Define a class with the specified lookup class.
1046 * lookup: Lookup class
1047 * name: the name of the class
1048 * buf: class bytes
1049 * len: length of class bytes
1050 * pd: protection domain
1051 * init: initialize the class
1052 * flags: properties of the class
1053 * classData: private static pre-initialized field
1054 */
1055 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1056 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1057
1058 if (lookup == nullptr) {
1059 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1060 }
1061
1062 assert(buf != nullptr, "buf must not be null");
1063
1064 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1065 JVM_END
1066
1067 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))
1068 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1069 JVM_END
1070
1071 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1072 ResourceMark rm(THREAD);
1073
1074 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1075 char* str = java_lang_String::as_utf8_string(h_name());
1076
1077 // Sanity check, don't expect null
1078 if (str == nullptr) return nullptr;
1079
1080 // Internalize the string, converting '.' to '/' in string.
1081 char* p = (char*)str;
1082 while (*p != '\0') {
1083 if (*p == '.') {
1084 *p = '/';
1085 }
1086 p++;
1087 }
1088
1089 const int str_len = (int)(p - str);
1090 if (str_len > Symbol::max_length()) {
1091 // It's impossible to create this class; the name cannot fit
1092 // into the constant pool.
1093 return nullptr;
1094 }
1095 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1096
1097 // Security Note:
1098 // The Java level wrapper will perform the necessary security check allowing
1099 // us to pass the null as the initiating class loader.
1100 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1101 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1102 #if INCLUDE_CDS
1103 if (k == nullptr) {
1104 // If the class is not already loaded, try to see if it's in the shared
1105 // archive for the current classloader (h_loader).
1106 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1107 }
1108 #endif
1109 return (k == nullptr) ? nullptr :
1110 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1111 JVM_END
1112
1113 // Module support //////////////////////////////////////////////////////////////////////////////
1114
1115 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1116 jstring location, jobjectArray packages))
1117 Handle h_module (THREAD, JNIHandles::resolve(module));
1118 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1119 JVM_END
1120
1121 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1122 Handle h_module (THREAD, JNIHandles::resolve(module));
1123 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1124 JVM_END
1125
1126 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1127 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1128 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1129 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1130 JVM_END
1131
1132 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1133 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1134 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1135 JVM_END
1136
1137 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1138 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1139 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1140 JVM_END
1141
1142 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1143 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1144 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1145 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1146 JVM_END
1147
1148 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1149 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1150 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1151 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1152 JVM_END
1153
1154 // Reflection support //////////////////////////////////////////////////////////////////////////////
1155
1156 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1157 assert (cls != nullptr, "illegal class");
1158 JvmtiVMObjectAllocEventCollector oam;
1159 ResourceMark rm(THREAD);
1160 HandleMark hm(THREAD);
1161 Handle java_class(THREAD, JNIHandles::resolve(cls));
1162 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1163 return (jstring) JNIHandles::make_local(THREAD, result);
1164 JVM_END
1165
1166
1167 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1168 JvmtiVMObjectAllocEventCollector oam;
1169 oop mirror = JNIHandles::resolve_non_null(cls);
1170
1171 // Special handling for primitive objects
1172 if (java_lang_Class::is_primitive(mirror)) {
1173 // Primitive objects does not have any interfaces
1174 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1175 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1176 }
1177
1178 Klass* klass = java_lang_Class::as_Klass(mirror);
1179 // Figure size of result array
1180 int size;
1181 if (klass->is_instance_klass()) {
1182 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1183 } else {
1184 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1185 size = 2;
1186 }
1187
1188 // Allocate result array
1189 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1190 objArrayHandle result (THREAD, r);
1191 // Fill in result
1192 if (klass->is_instance_klass()) {
1193 // Regular instance klass, fill in all local interfaces
1194 for (int index = 0; index < size; index++) {
1195 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1196 result->obj_at_put(index, k->java_mirror());
1197 }
1198 } else {
1199 // All arrays implement java.lang.Cloneable and java.io.Serializable
1200 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1201 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1202 }
1203 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1204 JVM_END
1205
1206
1207 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1208 oop mirror = JNIHandles::resolve_non_null(cls);
1209 if (java_lang_Class::is_primitive(mirror)) {
1210 return JNI_FALSE;
1211 }
1212 Klass* k = java_lang_Class::as_Klass(mirror);
1213 return k->is_hidden();
1214 JVM_END
1215
1216 class ScopedValueBindingsResolver {
1217 public:
1218 InstanceKlass* Carrier_klass;
1219 ScopedValueBindingsResolver(JavaThread* THREAD) {
1220 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1221 Carrier_klass = InstanceKlass::cast(k);
1222 }
1223 };
1224
1225 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1226 ResourceMark rm(THREAD);
1227 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1228 JvmtiVMObjectAllocEventCollector oam;
1229
1230 static ScopedValueBindingsResolver resolver(THREAD);
1231
1232 // Iterate through Java frames
1233 vframeStream vfst(thread);
1234 for(; !vfst.at_end(); vfst.next()) {
1235 int loc = -1;
1236 // get method of frame
1237 Method* method = vfst.method();
1238
1239 Symbol *name = method->name();
1240
1241 InstanceKlass* holder = method->method_holder();
1242 if (name == vmSymbols::runWith_method_name()) {
1243 if (holder == vmClasses::Thread_klass()
1244 || holder == resolver.Carrier_klass) {
1245 loc = 1;
1246 }
1247 }
1248
1249 if (loc != -1) {
1250 javaVFrame *frame = vfst.asJavaVFrame();
1251 StackValueCollection* locals = frame->locals();
1252 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1253 Handle result = head_sv->get_obj();
1254 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1255 if (result() != nullptr) {
1256 return JNIHandles::make_local(THREAD, result());
1257 }
1258 }
1259 }
1260
1261 return nullptr;
1262 JVM_END
1263
1264
1265 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1266 JvmtiVMObjectAllocEventCollector oam;
1267 // ofClass is a reference to a java_lang_Class object. The mirror object
1268 // of an InstanceKlass
1269 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1270 if (java_lang_Class::is_primitive(ofMirror) ||
1271 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1272 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1273 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1274 }
1275
1276 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1277 InnerClassesIterator iter(k);
1278
1279 if (iter.length() == 0) {
1280 // Neither an inner nor outer class
1281 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1282 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1283 }
1284
1285 // find inner class info
1286 constantPoolHandle cp(thread, k->constants());
1287 int length = iter.length();
1288
1289 // Allocate temp. result array
1290 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1291 objArrayHandle result (THREAD, r);
1292 int members = 0;
1293
1294 for (; !iter.done(); iter.next()) {
1295 int ioff = iter.inner_class_info_index();
1296 int ooff = iter.outer_class_info_index();
1297
1298 if (ioff != 0 && ooff != 0) {
1299 // Check to see if the name matches the class we're looking for
1300 // before attempting to find the class.
1301 if (cp->klass_name_at_matches(k, ooff)) {
1302 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1303 if (outer_klass == k) {
1304 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1305 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1306
1307 // Throws an exception if outer klass has not declared k as
1308 // an inner klass
1309 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1310
1311 result->obj_at_put(members, inner_klass->java_mirror());
1312 members++;
1313 }
1314 }
1315 }
1316 }
1317
1318 if (members != length) {
1319 // Return array of right length
1320 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1321 for(int i = 0; i < members; i++) {
1322 res->obj_at_put(i, result->obj_at(i));
1323 }
1324 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1325 }
1326
1327 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1328 JVM_END
1329
1330
1331 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1332 {
1333 // ofClass is a reference to a java_lang_Class object.
1334 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1335 if (java_lang_Class::is_primitive(ofMirror)) {
1336 return nullptr;
1337 }
1338 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1339 if (!klass->is_instance_klass()) {
1340 return nullptr;
1341 }
1342
1343 bool inner_is_member = false;
1344 Klass* outer_klass
1345 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1346 if (outer_klass == nullptr) return nullptr; // already a top-level class
1347 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1348 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1349 }
1350 JVM_END
1351
1352 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1353 {
1354 oop mirror = JNIHandles::resolve_non_null(cls);
1355 if (java_lang_Class::is_primitive(mirror)) {
1356 return nullptr;
1357 }
1358 Klass* klass = java_lang_Class::as_Klass(mirror);
1359 if (!klass->is_instance_klass()) {
1360 return nullptr;
1361 }
1362 InstanceKlass* k = InstanceKlass::cast(klass);
1363 int ooff = 0, noff = 0;
1364 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1365 if (noff != 0) {
1366 constantPoolHandle i_cp(thread, k->constants());
1367 Symbol* name = i_cp->symbol_at(noff);
1368 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1369 return (jstring) JNIHandles::make_local(THREAD, str());
1370 }
1371 }
1372 return nullptr;
1373 }
1374 JVM_END
1375
1376 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1377 assert (cls != nullptr, "illegal class");
1378 JvmtiVMObjectAllocEventCollector oam;
1379 ResourceMark rm(THREAD);
1380 oop mirror = JNIHandles::resolve_non_null(cls);
1381 // Return null for arrays and primitives
1382 if (!java_lang_Class::is_primitive(mirror)) {
1383 Klass* k = java_lang_Class::as_Klass(mirror);
1384 if (k->is_instance_klass()) {
1385 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1386 if (sym == nullptr) return nullptr;
1387 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1388 return (jstring) JNIHandles::make_local(THREAD, str());
1389 }
1390 }
1391 return nullptr;
1392 JVM_END
1393
1394
1395 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1396 assert (cls != nullptr, "illegal class");
1397 oop mirror = JNIHandles::resolve_non_null(cls);
1398 // Return null for arrays and primitives
1399 if (!java_lang_Class::is_primitive(mirror)) {
1400 Klass* k = java_lang_Class::as_Klass(mirror);
1401 if (k->is_instance_klass()) {
1402 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1403 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1404 }
1405 }
1406 return nullptr;
1407 JVM_END
1408
1409
1410 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1411 // some of this code was adapted from from jni_FromReflectedField
1412
1413 oop reflected = JNIHandles::resolve_non_null(field);
1414 oop mirror = java_lang_reflect_Field::clazz(reflected);
1415 Klass* k = java_lang_Class::as_Klass(mirror);
1416 int slot = java_lang_reflect_Field::slot(reflected);
1417 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1418
1419 InstanceKlass* ik = InstanceKlass::cast(k);
1420 int offset = ik->field_offset(slot);
1421
1422 if (modifiers & JVM_ACC_STATIC) {
1423 // for static fields we only look in the current class
1424 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1425 assert(false, "cannot find static field");
1426 return false;
1427 }
1428 } else {
1429 // for instance fields we start with the current class and work
1430 // our way up through the superclass chain
1431 if (!ik->find_field_from_offset(offset, false, &fd)) {
1432 assert(false, "cannot find instance field");
1433 return false;
1434 }
1435 }
1436 return true;
1437 }
1438
1439 static Method* jvm_get_method_common(jobject method) {
1440 // some of this code was adapted from from jni_FromReflectedMethod
1441
1442 oop reflected = JNIHandles::resolve_non_null(method);
1443 oop mirror = nullptr;
1444 int slot = 0;
1445
1446 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1447 mirror = java_lang_reflect_Constructor::clazz(reflected);
1448 slot = java_lang_reflect_Constructor::slot(reflected);
1449 } else {
1450 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1451 "wrong type");
1452 mirror = java_lang_reflect_Method::clazz(reflected);
1453 slot = java_lang_reflect_Method::slot(reflected);
1454 }
1455 Klass* k = java_lang_Class::as_Klass(mirror);
1456
1457 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1458 assert(m != nullptr, "cannot find method");
1459 return m; // caller has to deal with null in product mode
1460 }
1461
1462 /* Type use annotations support (JDK 1.8) */
1463
1464 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1465 assert (cls != nullptr, "illegal class");
1466 ResourceMark rm(THREAD);
1467 // Return null for arrays and primitives
1468 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1470 if (k->is_instance_klass()) {
1471 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1472 if (type_annotations != nullptr) {
1473 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1474 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1475 }
1476 }
1477 }
1478 return nullptr;
1479 JVM_END
1480
1481 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1482 assert (method != nullptr, "illegal method");
1483 // method is a handle to a java.lang.reflect.Method object
1484 Method* m = jvm_get_method_common(method);
1485 if (m == nullptr) {
1486 return nullptr;
1487 }
1488
1489 AnnotationArray* type_annotations = m->type_annotations();
1490 if (type_annotations != nullptr) {
1491 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1492 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1493 }
1494
1495 return nullptr;
1496 JVM_END
1497
1498 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1499 assert (field != nullptr, "illegal field");
1500 fieldDescriptor fd;
1501 bool gotFd = jvm_get_field_common(field, fd);
1502 if (!gotFd) {
1503 return nullptr;
1504 }
1505
1506 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1507 JVM_END
1508
1509 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1510 if (!cp->is_within_bounds(index)) {
1511 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1512 }
1513 }
1514
1515 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1516 {
1517 // method is a handle to a java.lang.reflect.Method object
1518 Method* method_ptr = jvm_get_method_common(method);
1519 methodHandle mh (THREAD, method_ptr);
1520 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1521 const int num_params = mh->method_parameters_length();
1522
1523 if (num_params < 0) {
1524 // A -1 return value from method_parameters_length means there is no
1525 // parameter data. Return null to indicate this to the reflection
1526 // API.
1527 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1528 return (jobjectArray)nullptr;
1529 } else {
1530 // Otherwise, we return something up to reflection, even if it is
1531 // a zero-length array. Why? Because in some cases this can
1532 // trigger a MalformedParametersException.
1533
1534 // make sure all the symbols are properly formatted
1535 for (int i = 0; i < num_params; i++) {
1536 MethodParametersElement* params = mh->method_parameters_start();
1537 int index = params[i].name_cp_index;
1538 constantPoolHandle cp(THREAD, mh->constants());
1539 bounds_check(cp, index, CHECK_NULL);
1540
1541 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1542 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1543 "Wrong type at constant pool index");
1544 }
1545
1546 }
1547
1548 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1549 objArrayHandle result (THREAD, result_oop);
1550
1551 for (int i = 0; i < num_params; i++) {
1552 MethodParametersElement* params = mh->method_parameters_start();
1553 // For a 0 index, give a null symbol
1554 Symbol* sym = 0 != params[i].name_cp_index ?
1555 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1556 int flags = params[i].flags;
1557 oop param = Reflection::new_parameter(reflected_method, i, sym,
1558 flags, CHECK_NULL);
1559 result->obj_at_put(i, param);
1560 }
1561 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1562 }
1563 }
1564 JVM_END
1565
1566 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1567
1568 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1569 {
1570 JvmtiVMObjectAllocEventCollector oam;
1571
1572 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1573 // Exclude primitive types and array types
1574 if (java_lang_Class::is_primitive(ofMirror) ||
1575 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1576 // Return empty array
1577 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1578 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1579 }
1580
1581 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1582 constantPoolHandle cp(THREAD, k->constants());
1583
1584 // Ensure class is linked
1585 k->link_class(CHECK_NULL);
1586
1587 // Allocate result
1588 int num_fields;
1589
1590 if (publicOnly) {
1591 num_fields = 0;
1592 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1593 if (fs.access_flags().is_public()) ++num_fields;
1594 }
1595 } else {
1596 num_fields = k->java_fields_count();
1597 }
1598
1599 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1600 objArrayHandle result (THREAD, r);
1601
1602 int out_idx = 0;
1603 fieldDescriptor fd;
1604 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1605 if (!publicOnly || fs.access_flags().is_public()) {
1606 fd.reinitialize(k, fs.index());
1607 oop field = Reflection::new_field(&fd, CHECK_NULL);
1608 result->obj_at_put(out_idx, field);
1609 ++out_idx;
1610 }
1611 }
1612 assert(out_idx == num_fields, "just checking");
1613 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1614 }
1615 JVM_END
1616
1617 // A class is a record if and only if it is final and a direct subclass of
1618 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1619 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1620 {
1621 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1622 if (k != nullptr && k->is_instance_klass()) {
1623 InstanceKlass* ik = InstanceKlass::cast(k);
1624 return ik->is_record();
1625 } else {
1626 return false;
1627 }
1628 }
1629 JVM_END
1630
1631 // Returns an array containing the components of the Record attribute,
1632 // or null if the attribute is not present.
1633 //
1634 // Note that this function returns the components of the Record attribute
1635 // even if the class is not a record.
1636 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1637 {
1638 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1639 assert(c->is_instance_klass(), "must be");
1640 InstanceKlass* ik = InstanceKlass::cast(c);
1641
1642 Array<RecordComponent*>* components = ik->record_components();
1643 if (components != nullptr) {
1644 JvmtiVMObjectAllocEventCollector oam;
1645 constantPoolHandle cp(THREAD, ik->constants());
1646 int length = components->length();
1647 assert(length >= 0, "unexpected record_components length");
1648 objArrayOop record_components =
1649 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1650 objArrayHandle components_h (THREAD, record_components);
1651
1652 for (int x = 0; x < length; x++) {
1653 RecordComponent* component = components->at(x);
1654 assert(component != nullptr, "unexpected null record component");
1655 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1656 components_h->obj_at_put(x, component_oop);
1657 }
1658 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1659 }
1660
1661 return nullptr;
1662 }
1663 JVM_END
1664
1665 static jobjectArray get_class_declared_methods_helper(
1666 JNIEnv *env,
1667 jclass ofClass, jboolean publicOnly,
1668 bool want_constructor,
1669 Klass* klass, TRAPS) {
1670
1671 JvmtiVMObjectAllocEventCollector oam;
1672
1673 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1674 // Exclude primitive types and array types
1675 if (java_lang_Class::is_primitive(ofMirror)
1676 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1677 // Return empty array
1678 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1679 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1680 }
1681
1682 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1683
1684 // Ensure class is linked
1685 k->link_class(CHECK_NULL);
1686
1687 Array<Method*>* methods = k->methods();
1688 int methods_length = methods->length();
1689
1690 // Save original method_idnum in case of redefinition, which can change
1691 // the idnum of obsolete methods. The new method will have the same idnum
1692 // but if we refresh the methods array, the counts will be wrong.
1693 ResourceMark rm(THREAD);
1694 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1695 int num_methods = 0;
1696
1697 // Select methods matching the criteria.
1698 for (int i = 0; i < methods_length; i++) {
1699 Method* method = methods->at(i);
1700 if (want_constructor && !method->is_object_initializer()) {
1701 continue;
1702 }
1703 if (!want_constructor &&
1704 (method->is_object_initializer() || method->is_static_initializer() ||
1705 method->is_overpass())) {
1706 continue;
1707 }
1708 if (publicOnly && !method->is_public()) {
1709 continue;
1710 }
1711 idnums->push(method->method_idnum());
1712 ++num_methods;
1713 }
1714
1715 // Allocate result
1716 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1717 objArrayHandle result (THREAD, r);
1718
1719 // Now just put the methods that we selected above, but go by their idnum
1720 // in case of redefinition. The methods can be redefined at any safepoint,
1721 // so above when allocating the oop array and below when creating reflect
1722 // objects.
1723 for (int i = 0; i < num_methods; i++) {
1724 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1725 if (method.is_null()) {
1726 // Method may have been deleted and seems this API can handle null
1727 // Otherwise should probably put a method that throws NSME
1728 result->obj_at_put(i, nullptr);
1729 } else {
1730 oop m;
1731 if (want_constructor) {
1732 m = Reflection::new_constructor(method, CHECK_NULL);
1733 } else {
1734 m = Reflection::new_method(method, false, CHECK_NULL);
1735 }
1736 result->obj_at_put(i, m);
1737 }
1738 }
1739
1740 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1741 }
1742
1743 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1744 {
1745 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1746 /*want_constructor*/ false,
1747 vmClasses::reflect_Method_klass(), THREAD);
1748 }
1749 JVM_END
1750
1751 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1752 {
1753 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1754 /*want_constructor*/ true,
1755 vmClasses::reflect_Constructor_klass(), THREAD);
1756 }
1757 JVM_END
1758
1759 JVM_ENTRY_PROF(jint, JVM_GetClassAccessFlags, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1760 {
1761 oop mirror = JNIHandles::resolve_non_null(cls);
1762 if (java_lang_Class::is_primitive(mirror)) {
1763 // Primitive type
1764 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1765 }
1766
1767 Klass* k = java_lang_Class::as_Klass(mirror);
1768 return k->access_flags().as_class_flags();
1769 }
1770 JVM_END
1771
1772 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1773 {
1774 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1775 assert(c->is_instance_klass(), "must be");
1776 InstanceKlass* ck = InstanceKlass::cast(c);
1777 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1778 assert(m->is_instance_klass(), "must be");
1779 InstanceKlass* mk = InstanceKlass::cast(m);
1780 return ck->has_nestmate_access_to(mk, THREAD);
1781 }
1782 JVM_END
1783
1784 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1785 {
1786 // current is not a primitive or array class
1787 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1788 assert(c->is_instance_klass(), "must be");
1789 InstanceKlass* ck = InstanceKlass::cast(c);
1790 InstanceKlass* host = ck->nest_host(THREAD);
1791 return (jclass) (host == nullptr ? nullptr :
1792 JNIHandles::make_local(THREAD, host->java_mirror()));
1793 }
1794 JVM_END
1795
1796 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1797 {
1798 // current is not a primitive or array class
1799 ResourceMark rm(THREAD);
1800 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1801 assert(c->is_instance_klass(), "must be");
1802 InstanceKlass* ck = InstanceKlass::cast(c);
1803 InstanceKlass* host = ck->nest_host(THREAD);
1804
1805 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1806 ck->external_name(), host->external_name());
1807 {
1808 JvmtiVMObjectAllocEventCollector oam;
1809 Array<u2>* members = host->nest_members();
1810 int length = members == nullptr ? 0 : members->length();
1811
1812 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1813
1814 // nest host is first in the array so make it one bigger
1815 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1816 length + 1, CHECK_NULL);
1817 objArrayHandle result(THREAD, r);
1818 result->obj_at_put(0, host->java_mirror());
1819 if (length != 0) {
1820 int count = 0;
1821 for (int i = 0; i < length; i++) {
1822 int cp_index = members->at(i);
1823 Klass* k = host->constants()->klass_at(cp_index, THREAD);
1824 if (HAS_PENDING_EXCEPTION) {
1825 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1826 return nullptr; // propagate VMEs
1827 }
1828 if (log_is_enabled(Trace, class, nestmates)) {
1829 stringStream ss;
1830 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1831 ss.print(" - resolution of nest member %s failed: ", target_member_class);
1832 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1833 log_trace(class, nestmates)("%s", ss.as_string());
1834 }
1835 CLEAR_PENDING_EXCEPTION;
1836 continue;
1837 }
1838 if (k->is_instance_klass()) {
1839 InstanceKlass* ik = InstanceKlass::cast(k);
1840 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1841 if (nest_host_k == host) {
1842 result->obj_at_put(count+1, k->java_mirror());
1843 count++;
1844 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1845 } else {
1846 log_trace(class, nestmates)(" - skipping member %s with different host %s",
1847 ik->external_name(), nest_host_k->external_name());
1848 }
1849 } else {
1850 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1851 k->external_name());
1852 }
1853 }
1854 if (count < length) {
1855 // we had invalid entries so we need to compact the array
1856 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1857 length + 1, count + 1);
1858
1859 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1860 count + 1, CHECK_NULL);
1861 objArrayHandle result2(THREAD, r2);
1862 for (int i = 0; i < count + 1; i++) {
1863 result2->obj_at_put(i, result->obj_at(i));
1864 }
1865 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1866 }
1867 }
1868 else {
1869 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
1870 }
1871 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1872 }
1873 }
1874 JVM_END
1875
1876 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1877 {
1878 oop mirror = JNIHandles::resolve_non_null(current);
1879 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1880 Klass* c = java_lang_Class::as_Klass(mirror);
1881 assert(c->is_instance_klass(), "must be");
1882 InstanceKlass* ik = InstanceKlass::cast(c);
1883 ResourceMark rm(THREAD);
1884 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1885 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1886 if (ik->is_sealed()) {
1887 JvmtiVMObjectAllocEventCollector oam;
1888 Array<u2>* subclasses = ik->permitted_subclasses();
1889 int length = subclasses->length();
1890
1891 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1892
1893 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1894 length, CHECK_NULL);
1895 objArrayHandle result(THREAD, r);
1896 int count = 0;
1897 for (int i = 0; i < length; i++) {
1898 int cp_index = subclasses->at(i);
1899 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
1900 if (HAS_PENDING_EXCEPTION) {
1901 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1902 return nullptr; // propagate VMEs
1903 }
1904 if (log_is_enabled(Trace, class, sealed)) {
1905 stringStream ss;
1906 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
1907 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
1908 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1909 log_trace(class, sealed)("%s", ss.as_string());
1910 }
1911
1912 CLEAR_PENDING_EXCEPTION;
1913 continue;
1914 }
1915 if (k->is_instance_klass()) {
1916 result->obj_at_put(count++, k->java_mirror());
1917 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
1918 }
1919 }
1920 if (count < length) {
1921 // we had invalid entries so we need to compact the array
1922 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1923 count, CHECK_NULL);
1924 objArrayHandle result2(THREAD, r2);
1925 for (int i = 0; i < count; i++) {
1926 result2->obj_at_put(i, result->obj_at(i));
1927 }
1928 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1929 }
1930 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1931 } else {
1932 return nullptr;
1933 }
1934 }
1935 JVM_END
1936
1937 // Constant pool access //////////////////////////////////////////////////////////
1938
1939 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1940 {
1941 JvmtiVMObjectAllocEventCollector oam;
1942 oop mirror = JNIHandles::resolve_non_null(cls);
1943 // Return null for primitives and arrays
1944 if (!java_lang_Class::is_primitive(mirror)) {
1945 Klass* k = java_lang_Class::as_Klass(mirror);
1946 if (k->is_instance_klass()) {
1947 InstanceKlass* k_h = InstanceKlass::cast(k);
1948 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1949 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1950 return JNIHandles::make_local(THREAD, jcp());
1951 }
1952 }
1953 return nullptr;
1954 }
1955 JVM_END
1956
1957
1958 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1959 {
1960 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1961 return cp->length();
1962 }
1963 JVM_END
1964
1965
1966 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1967 {
1968 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1969 bounds_check(cp, index, CHECK_NULL);
1970 constantTag tag = cp->tag_at(index);
1971 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1972 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1973 }
1974 Klass* k = cp->klass_at(index, CHECK_NULL);
1975 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1976 }
1977 JVM_END
1978
1979 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1980 {
1981 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1982 bounds_check(cp, index, CHECK_NULL);
1983 constantTag tag = cp->tag_at(index);
1984 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1985 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1986 }
1987 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1988 if (k == nullptr) return nullptr;
1989 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1990 }
1991 JVM_END
1992
1993 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1994 constantTag tag = cp->tag_at(index);
1995 if (!tag.is_method() && !tag.is_interface_method()) {
1996 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1997 }
1998 int klass_ref = cp->uncached_klass_ref_index_at(index);
1999 Klass* k_o;
2000 if (force_resolution) {
2001 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2002 } else {
2003 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2004 if (k_o == nullptr) return nullptr;
2005 }
2006 InstanceKlass* k = InstanceKlass::cast(k_o);
2007 Symbol* name = cp->uncached_name_ref_at(index);
2008 Symbol* sig = cp->uncached_signature_ref_at(index);
2009 methodHandle m (THREAD, k->find_method(name, sig));
2010 if (m.is_null()) {
2011 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2012 }
2013 oop method;
2014 if (m->is_object_initializer()) {
2015 method = Reflection::new_constructor(m, CHECK_NULL);
2016 } else {
2017 // new_method accepts <clinit> as Method here
2018 method = Reflection::new_method(m, true, CHECK_NULL);
2019 }
2020 return JNIHandles::make_local(THREAD, method);
2021 }
2022
2023 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2024 {
2025 JvmtiVMObjectAllocEventCollector oam;
2026 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2027 bounds_check(cp, index, CHECK_NULL);
2028 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2029 return res;
2030 }
2031 JVM_END
2032
2033 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, 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, false, CHECK_NULL);
2039 return res;
2040 }
2041 JVM_END
2042
2043 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2044 constantTag tag = cp->tag_at(index);
2045 if (!tag.is_field()) {
2046 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2047 }
2048 int klass_ref = cp->uncached_klass_ref_index_at(index);
2049 Klass* k_o;
2050 if (force_resolution) {
2051 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2052 } else {
2053 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2054 if (k_o == nullptr) return nullptr;
2055 }
2056 InstanceKlass* k = InstanceKlass::cast(k_o);
2057 Symbol* name = cp->uncached_name_ref_at(index);
2058 Symbol* sig = cp->uncached_signature_ref_at(index);
2059 fieldDescriptor fd;
2060 Klass* target_klass = k->find_field(name, sig, &fd);
2061 if (target_klass == nullptr) {
2062 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2063 }
2064 oop field = Reflection::new_field(&fd, CHECK_NULL);
2065 return JNIHandles::make_local(THREAD, field);
2066 }
2067
2068 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2069 {
2070 JvmtiVMObjectAllocEventCollector oam;
2071 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072 bounds_check(cp, index, CHECK_NULL);
2073 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2074 return res;
2075 }
2076 JVM_END
2077
2078 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, 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, false, CHECK_NULL);
2084 return res;
2085 }
2086 JVM_END
2087
2088 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, 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 constantTag tag = cp->tag_at(index);
2094 if (!tag.is_field_or_method()) {
2095 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2096 }
2097 int klass_ref = cp->uncached_klass_ref_index_at(index);
2098 Symbol* klass_name = cp->klass_name_at(klass_ref);
2099 Symbol* member_name = cp->uncached_name_ref_at(index);
2100 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2101 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2102 objArrayHandle dest(THREAD, dest_o);
2103 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2104 dest->obj_at_put(0, str());
2105 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2106 dest->obj_at_put(1, str());
2107 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2108 dest->obj_at_put(2, str());
2109 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2110 }
2111 JVM_END
2112
2113 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2114 {
2115 JvmtiVMObjectAllocEventCollector oam;
2116 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117 bounds_check(cp, index, CHECK_0);
2118 constantTag tag = cp->tag_at(index);
2119 if (!tag.is_field_or_method()) {
2120 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2121 }
2122 return (jint) cp->uncached_klass_ref_index_at(index);
2123 }
2124 JVM_END
2125
2126 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2127 {
2128 JvmtiVMObjectAllocEventCollector oam;
2129 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2130 bounds_check(cp, index, CHECK_0);
2131 constantTag tag = cp->tag_at(index);
2132 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2133 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2134 }
2135 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2136 }
2137 JVM_END
2138
2139 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2140 {
2141 JvmtiVMObjectAllocEventCollector oam;
2142 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_NULL);
2144 constantTag tag = cp->tag_at(index);
2145 if (!tag.is_name_and_type()) {
2146 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147 }
2148 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2149 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2150 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2151 objArrayHandle dest(THREAD, dest_o);
2152 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2153 dest->obj_at_put(0, str());
2154 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2155 dest->obj_at_put(1, str());
2156 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2157 }
2158 JVM_END
2159
2160 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2161 {
2162 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 bounds_check(cp, index, CHECK_0);
2164 constantTag tag = cp->tag_at(index);
2165 if (!tag.is_int()) {
2166 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2167 }
2168 return cp->int_at(index);
2169 }
2170 JVM_END
2171
2172 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2173 {
2174 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175 bounds_check(cp, index, CHECK_(0L));
2176 constantTag tag = cp->tag_at(index);
2177 if (!tag.is_long()) {
2178 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179 }
2180 return cp->long_at(index);
2181 }
2182 JVM_END
2183
2184 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2185 {
2186 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2187 bounds_check(cp, index, CHECK_(0.0f));
2188 constantTag tag = cp->tag_at(index);
2189 if (!tag.is_float()) {
2190 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2191 }
2192 return cp->float_at(index);
2193 }
2194 JVM_END
2195
2196 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2197 {
2198 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2199 bounds_check(cp, index, CHECK_(0.0));
2200 constantTag tag = cp->tag_at(index);
2201 if (!tag.is_double()) {
2202 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2203 }
2204 return cp->double_at(index);
2205 }
2206 JVM_END
2207
2208 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2209 {
2210 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211 bounds_check(cp, index, CHECK_NULL);
2212 constantTag tag = cp->tag_at(index);
2213 if (!tag.is_string()) {
2214 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215 }
2216 oop str = cp->string_at(index, CHECK_NULL);
2217 return (jstring) JNIHandles::make_local(THREAD, str);
2218 }
2219 JVM_END
2220
2221 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2222 {
2223 JvmtiVMObjectAllocEventCollector oam;
2224 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2225 bounds_check(cp, index, CHECK_NULL);
2226 constantTag tag = cp->tag_at(index);
2227 if (!tag.is_symbol()) {
2228 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2229 }
2230 Symbol* sym = cp->symbol_at(index);
2231 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2232 return (jstring) JNIHandles::make_local(THREAD, str());
2233 }
2234 JVM_END
2235
2236 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2237 {
2238 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2239 bounds_check(cp, index, CHECK_0);
2240 constantTag tag = cp->tag_at(index);
2241 jbyte result = tag.value();
2242 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2243 // they are changed to the corresponding tags from the JVM spec, so that java code in
2244 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2245 if (tag.is_klass_or_reference()) {
2246 result = JVM_CONSTANT_Class;
2247 } else if (tag.is_string_index()) {
2248 result = JVM_CONSTANT_String;
2249 } else if (tag.is_method_type_in_error()) {
2250 result = JVM_CONSTANT_MethodType;
2251 } else if (tag.is_method_handle_in_error()) {
2252 result = JVM_CONSTANT_MethodHandle;
2253 } else if (tag.is_dynamic_constant_in_error()) {
2254 result = JVM_CONSTANT_Dynamic;
2255 }
2256 return result;
2257 }
2258 JVM_END
2259
2260 // Assertion support. //////////////////////////////////////////////////////////
2261
2262 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2263 assert(cls != nullptr, "bad class");
2264
2265 oop r = JNIHandles::resolve(cls);
2266 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2267 if (java_lang_Class::is_primitive(r)) return false;
2268
2269 Klass* k = java_lang_Class::as_Klass(r);
2270 assert(k->is_instance_klass(), "must be an instance klass");
2271 if (!k->is_instance_klass()) return false;
2272
2273 ResourceMark rm(THREAD);
2274 const char* name = k->name()->as_C_string();
2275 bool system_class = k->class_loader() == nullptr;
2276 return JavaAssertions::enabled(name, system_class);
2277
2278 JVM_END
2279
2280
2281 // Return a new AssertionStatusDirectives object with the fields filled in with
2282 // command-line assertion arguments (i.e., -ea, -da).
2283 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2284 JvmtiVMObjectAllocEventCollector oam;
2285 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2286 return JNIHandles::make_local(THREAD, asd);
2287 JVM_END
2288
2289 // Verification ////////////////////////////////////////////////////////////////////////////////
2290
2291 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2292
2293 // RedefineClasses support: bug 6214132 caused verification to fail.
2294 // All functions from this section should call the jvmtiThreadSate function:
2295 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2296 // The function returns a Klass* of the _scratch_class if the verifier
2297 // was invoked in the middle of the class redefinition.
2298 // Otherwise it returns its argument value which is the _the_class Klass*.
2299 // Please, refer to the description in the jvmtiThreadState.hpp.
2300
2301 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
2302 oop mirror = JNIHandles::resolve_non_null(cls);
2303 if (java_lang_Class::is_primitive(mirror)) {
2304 return JNI_FALSE;
2305 }
2306 Klass* k = java_lang_Class::as_Klass(mirror);
2307 // This isn't necessary since answer is the same since redefinition
2308 // has already checked this matches for the scratch class.
2309 // k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310 jboolean result = k->is_interface();
2311 assert(!result || k->is_instance_klass(),
2312 "all interfaces are instance types");
2313 return result;
2314 JVM_END
2315
2316
2317 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2318 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320 return k->name()->as_utf8();
2321 JVM_END
2322
2323
2324 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2327 // types will have length zero if this is not an InstanceKlass
2328 // (length is determined by call to JVM_GetClassCPEntriesCount)
2329 if (k->is_instance_klass()) {
2330 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2331 for (int index = cp->length() - 1; index >= 0; index--) {
2332 constantTag tag = cp->tag_at(index);
2333 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2334 }
2335 }
2336 JVM_END
2337
2338
2339 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2340 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2341 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2342 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2343 JVM_END
2344
2345
2346 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2347 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2348 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2349 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2350 JVM_END
2351
2352
2353 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2357 JVM_END
2358
2359
2360 // The following methods, used for the verifier, are never called with
2361 // array klasses, so a direct cast to InstanceKlass is safe.
2362 // Typically, these methods are called in a loop with bounds determined
2363 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2364 // zero for arrays.
2365 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2366 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2367 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2368 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2369 int length = method->checked_exceptions_length();
2370 if (length > 0) {
2371 CheckedExceptionElement* table= method->checked_exceptions_start();
2372 for (int i = 0; i < length; i++) {
2373 exceptions[i] = table[i].class_cp_index;
2374 }
2375 }
2376 JVM_END
2377
2378
2379 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2380 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2382 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2383 return method->checked_exceptions_length();
2384 JVM_END
2385
2386
2387 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2389 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2390 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2391 memcpy(code, method->code_base(), method->code_size());
2392 JVM_END
2393
2394
2395 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 return method->code_size();
2400 JVM_END
2401
2402
2403 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2407 ExceptionTable extable(method);
2408 entry->start_pc = extable.start_pc(entry_index);
2409 entry->end_pc = extable.end_pc(entry_index);
2410 entry->handler_pc = extable.handler_pc(entry_index);
2411 entry->catchType = extable.catch_type_index(entry_index);
2412 JVM_END
2413
2414
2415 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2416 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2417 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2418 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2419 return method->exception_table_length();
2420 JVM_END
2421
2422
2423 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2427 return method->access_flags().as_method_flags();
2428 JVM_END
2429
2430
2431 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2432 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 return InstanceKlass::cast(k)->field_access_flags(field_index);
2435 JVM_END
2436
2437
2438 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2439 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2440 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2441 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2442 return method->max_locals();
2443 JVM_END
2444
2445
2446 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2450 return method->size_of_parameters();
2451 JVM_END
2452
2453
2454 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2455 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2456 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2458 return method->verifier_max_stack();
2459 JVM_END
2460
2461
2462 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2463 ResourceMark rm(THREAD);
2464 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2465 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2466 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2467 return method->name() == vmSymbols::object_initializer_name();
2468 JVM_END
2469
2470
2471 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2472 ResourceMark rm(THREAD);
2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2476 return method->is_overpass();
2477 JVM_END
2478
2479 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2480 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2481 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2482 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2483 return method->name()->as_utf8();
2484 JVM_END
2485
2486
2487 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2488 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2489 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2490 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2491 return method->signature()->as_utf8();
2492 JVM_END
2493
2494 /**
2495 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2496 * read entries in the constant pool. Since the old verifier always
2497 * works on a copy of the code, it will not see any rewriting that
2498 * may possibly occur in the middle of verification. So it is important
2499 * that nothing it calls tries to use the cpCache instead of the raw
2500 * constant pool, so we must use cp->uncached_x methods when appropriate.
2501 */
2502 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2506 switch (cp->tag_at(cp_index).value()) {
2507 case JVM_CONSTANT_Fieldref:
2508 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2509 default:
2510 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2511 }
2512 ShouldNotReachHere();
2513 return nullptr;
2514 JVM_END
2515
2516
2517 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2519 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2520 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2521 switch (cp->tag_at(cp_index).value()) {
2522 case JVM_CONSTANT_InterfaceMethodref:
2523 case JVM_CONSTANT_Methodref:
2524 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2525 default:
2526 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2527 }
2528 ShouldNotReachHere();
2529 return nullptr;
2530 JVM_END
2531
2532
2533 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2535 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2536 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2537 switch (cp->tag_at(cp_index).value()) {
2538 case JVM_CONSTANT_InterfaceMethodref:
2539 case JVM_CONSTANT_Methodref:
2540 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2541 default:
2542 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2543 }
2544 ShouldNotReachHere();
2545 return nullptr;
2546 JVM_END
2547
2548
2549 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2551 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2552 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2553 switch (cp->tag_at(cp_index).value()) {
2554 case JVM_CONSTANT_Fieldref:
2555 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2556 default:
2557 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2558 }
2559 ShouldNotReachHere();
2560 return nullptr;
2561 JVM_END
2562
2563
2564 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2565 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2566 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2567 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2568 Symbol* classname = cp->klass_name_at(cp_index);
2569 return classname->as_utf8();
2570 JVM_END
2571
2572
2573 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2577 switch (cp->tag_at(cp_index).value()) {
2578 case JVM_CONSTANT_Fieldref: {
2579 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2580 Symbol* classname = cp->klass_name_at(class_index);
2581 return classname->as_utf8();
2582 }
2583 default:
2584 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2585 }
2586 ShouldNotReachHere();
2587 return nullptr;
2588 JVM_END
2589
2590
2591 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2593 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2594 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2595 switch (cp->tag_at(cp_index).value()) {
2596 case JVM_CONSTANT_Methodref:
2597 case JVM_CONSTANT_InterfaceMethodref: {
2598 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2599 Symbol* classname = cp->klass_name_at(class_index);
2600 return classname->as_utf8();
2601 }
2602 default:
2603 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2604 }
2605 ShouldNotReachHere();
2606 return nullptr;
2607 JVM_END
2608
2609
2610 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2612 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2613 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2614 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2615 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2616 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2617 switch (cp->tag_at(cp_index).value()) {
2618 case JVM_CONSTANT_Fieldref: {
2619 Symbol* name = cp->uncached_name_ref_at(cp_index);
2620 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2621 InstanceKlass* ik = InstanceKlass::cast(k_called);
2622 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2623 if (fs.name() == name && fs.signature() == signature) {
2624 return fs.access_flags().as_field_flags();
2625 }
2626 }
2627 return -1;
2628 }
2629 default:
2630 fatal("JVM_GetCPFieldModifiers: illegal constant");
2631 }
2632 ShouldNotReachHere();
2633 return 0;
2634 JVM_END
2635
2636
2637 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2638 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2639 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2640 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2641 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2642 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2643 switch (cp->tag_at(cp_index).value()) {
2644 case JVM_CONSTANT_Methodref:
2645 case JVM_CONSTANT_InterfaceMethodref: {
2646 Symbol* name = cp->uncached_name_ref_at(cp_index);
2647 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2648 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2649 int methods_count = methods->length();
2650 for (int i = 0; i < methods_count; i++) {
2651 Method* method = methods->at(i);
2652 if (method->name() == name && method->signature() == signature) {
2653 return method->access_flags().as_method_flags();
2654 }
2655 }
2656 return -1;
2657 }
2658 default:
2659 fatal("JVM_GetCPMethodModifiers: illegal constant");
2660 }
2661 ShouldNotReachHere();
2662 return 0;
2663 JVM_END
2664
2665
2666 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2667
2668 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2669 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2670 JVM_END
2671
2672
2673 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2674 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2675 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2676 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2677 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2678 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2679 JVM_END
2680
2681 // Printing support //////////////////////////////////////////////////
2682 extern "C" {
2683
2684 ATTRIBUTE_PRINTF(3, 0)
2685 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2686 // Reject count values that are negative signed values converted to
2687 // unsigned; see bug 4399518, 4417214
2688 if ((intptr_t)count <= 0) return -1;
2689
2690 int result = os::vsnprintf(str, count, fmt, args);
2691 if (result > 0 && (size_t)result >= count) {
2692 result = -1;
2693 }
2694
2695 return result;
2696 }
2697
2698 ATTRIBUTE_PRINTF(3, 4)
2699 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2700 va_list args;
2701 int len;
2702 va_start(args, fmt);
2703 len = jio_vsnprintf(str, count, fmt, args);
2704 va_end(args);
2705 return len;
2706 }
2707
2708 ATTRIBUTE_PRINTF(2, 3)
2709 int jio_fprintf(FILE* f, const char *fmt, ...) {
2710 int len;
2711 va_list args;
2712 va_start(args, fmt);
2713 len = jio_vfprintf(f, fmt, args);
2714 va_end(args);
2715 return len;
2716 }
2717
2718 ATTRIBUTE_PRINTF(2, 0)
2719 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2720 if (Arguments::vfprintf_hook() != nullptr) {
2721 return Arguments::vfprintf_hook()(f, fmt, args);
2722 } else {
2723 return vfprintf(f, fmt, args);
2724 }
2725 }
2726
2727 ATTRIBUTE_PRINTF(1, 2)
2728 JNIEXPORT int jio_printf(const char *fmt, ...) {
2729 int len;
2730 va_list args;
2731 va_start(args, fmt);
2732 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2733 va_end(args);
2734 return len;
2735 }
2736
2737 // HotSpot specific jio method
2738 void jio_print(const char* s, size_t len) {
2739 // Try to make this function as atomic as possible.
2740 if (Arguments::vfprintf_hook() != nullptr) {
2741 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2742 } else {
2743 // Make an unused local variable to avoid warning from gcc compiler.
2744 bool dummy = os::write(defaultStream::output_fd(), s, len);
2745 }
2746 }
2747
2748 } // Extern C
2749
2750 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2751
2752 // In most of the JVM thread support functions we need to access the
2753 // thread through a ThreadsListHandle to prevent it from exiting and
2754 // being reclaimed while we try to operate on it. The exceptions to this
2755 // rule are when operating on the current thread, or if the monitor of
2756 // the target java.lang.Thread is locked at the Java level - in both
2757 // cases the target cannot exit.
2758
2759 static void thread_entry(JavaThread* thread, TRAPS) {
2760 HandleMark hm(THREAD);
2761 Handle obj(THREAD, thread->threadObj());
2762 JavaValue result(T_VOID);
2763 JavaCalls::call_virtual(&result,
2764 obj,
2765 vmClasses::Thread_klass(),
2766 vmSymbols::run_method_name(),
2767 vmSymbols::void_method_signature(),
2768 THREAD);
2769 }
2770
2771
2772 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2773 #if INCLUDE_CDS
2774 if (CDSConfig::allow_only_single_java_thread()) {
2775 // During java -Xshare:dump, if we allow multiple Java threads to
2776 // execute in parallel, symbols and classes may be loaded in
2777 // random orders which will make the resulting CDS archive
2778 // non-deterministic.
2779 //
2780 // Lucikly, during java -Xshare:dump, it's important to run only
2781 // the code in the main Java thread (which is NOT started here) that
2782 // creates the module graph, etc. It's safe to not start the other
2783 // threads which are launched by class static initializers
2784 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2785 if (log_is_enabled(Info, cds)) {
2786 ResourceMark rm;
2787 oop t = JNIHandles::resolve_non_null(jthread);
2788 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2789 }
2790 return;
2791 }
2792 #endif
2793 JavaThread *native_thread = nullptr;
2794
2795 // We cannot hold the Threads_lock when we throw an exception,
2796 // due to rank ordering issues. Example: we might need to grab the
2797 // Heap_lock while we construct the exception.
2798 bool throw_illegal_thread_state = false;
2799
2800 // We must release the Threads_lock before we can post a jvmti event
2801 // in Thread::start.
2802 {
2803 ConditionalMutexLocker throttle_ml(ThreadsLockThrottle_lock, UseThreadsLockThrottleLock);
2804 // Ensure that the C++ Thread and OSThread structures aren't freed before
2805 // we operate.
2806 MutexLocker ml(Threads_lock);
2807
2808 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2809 // re-starting an already started thread, so we should usually find
2810 // that the JavaThread is null. However for a JNI attached thread
2811 // there is a small window between the Thread object being created
2812 // (with its JavaThread set) and the update to its threadStatus, so we
2813 // have to check for this
2814 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) {
2815 throw_illegal_thread_state = true;
2816 } else {
2817 jlong size =
2818 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2819 // Allocate the C++ Thread structure and create the native thread. The
2820 // stack size retrieved from java is 64-bit signed, but the constructor takes
2821 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2822 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2823 // - Avoid passing negative values which would result in really large stacks.
2824 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2825 size_t sz = size > 0 ? (size_t) size : 0;
2826 native_thread = new JavaThread(&thread_entry, sz);
2827
2828 // At this point it may be possible that no osthread was created for the
2829 // JavaThread due to lack of memory. Check for this situation and throw
2830 // an exception if necessary. Eventually we may want to change this so
2831 // that we only grab the lock if the thread was created successfully -
2832 // then we can also do this check and throw the exception in the
2833 // JavaThread constructor.
2834 if (native_thread->osthread() != nullptr) {
2835 // Note: the current thread is not being used within "prepare".
2836 native_thread->prepare(jthread);
2837 }
2838 }
2839 }
2840
2841 if (throw_illegal_thread_state) {
2842 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2843 }
2844
2845 assert(native_thread != nullptr, "Starting null thread?");
2846
2847 if (native_thread->osthread() == nullptr) {
2848 ResourceMark rm(thread);
2849 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2850 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2851 // No one should hold a reference to the 'native_thread'.
2852 native_thread->smr_delete();
2853 if (JvmtiExport::should_post_resource_exhausted()) {
2854 JvmtiExport::post_resource_exhausted(
2855 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2856 os::native_thread_creation_failed_msg());
2857 }
2858 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2859 os::native_thread_creation_failed_msg());
2860 }
2861
2862 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2863
2864 Thread::start(native_thread);
2865
2866 JVM_END
2867
2868
2869 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2870 ThreadsListHandle tlh(thread);
2871 oop java_thread = nullptr;
2872 JavaThread* receiver = nullptr;
2873 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2874 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2875
2876 if (is_alive) {
2877 // jthread refers to a live JavaThread.
2878 Thread::set_priority(receiver, (ThreadPriority)prio);
2879 }
2880 // Implied else: If the JavaThread hasn't started yet, then the
2881 // priority set in the java.lang.Thread object above will be pushed
2882 // down when it does start.
2883 JVM_END
2884
2885
2886 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2887 HOTSPOT_THREAD_YIELD();
2888 os::naked_yield();
2889 JVM_END
2890
2891 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2892 if (nanos < 0) {
2893 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2894 }
2895
2896 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2897 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2898 }
2899
2900 // Save current thread state and restore it at the end of this block.
2901 // And set new thread state to SLEEPING.
2902 JavaThreadSleepState jtss(thread);
2903
2904 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2905
2906 if (nanos == 0) {
2907 os::naked_yield();
2908 } else {
2909 ThreadState old_state = thread->osthread()->get_state();
2910 thread->osthread()->set_state(SLEEPING);
2911 if (!thread->sleep_nanos(nanos)) { // interrupted
2912 // An asynchronous exception could have been thrown on
2913 // us while we were sleeping. We do not overwrite those.
2914 if (!HAS_PENDING_EXCEPTION) {
2915 HOTSPOT_THREAD_SLEEP_END(1);
2916
2917 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2918 // to properly restore the thread state. That's likely wrong.
2919 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2920 }
2921 }
2922 thread->osthread()->set_state(old_state);
2923 }
2924 HOTSPOT_THREAD_SLEEP_END(0);
2925 JVM_END
2926
2927 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2928 oop jthread = thread->threadObj();
2929 assert(jthread != nullptr, "no current carrier thread!");
2930 return JNIHandles::make_local(THREAD, jthread);
2931 JVM_END
2932
2933 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2934 oop theThread = thread->vthread();
2935 assert(theThread != (oop)nullptr, "no current thread!");
2936 return JNIHandles::make_local(THREAD, theThread);
2937 JVM_END
2938
2939 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2940 jobject theThread))
2941 oop threadObj = JNIHandles::resolve(theThread);
2942 thread->set_vthread(threadObj);
2943
2944 // Set _monitor_owner_id of new current Thread
2945 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2946
2947 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2948 JVM_END
2949
2950 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2951 return ThreadIdentifier::unsafe_offset();
2952 JVM_END
2953
2954 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
2955 ThreadsListHandle tlh(thread);
2956 JavaThread* receiver = nullptr;
2957 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2958 if (is_alive) {
2959 // jthread refers to a live JavaThread.
2960 receiver->interrupt();
2961 }
2962 JVM_END
2963
2964 // Return true iff the current thread has locked the object passed in
2965
2966 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2967 if (obj == nullptr) {
2968 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2969 }
2970 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2971 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2972 JVM_END
2973
2974 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2975 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
2976 return JNIHandles::make_local(THREAD, trace);
2977 JVM_END
2978
2979
2980 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
2981 // We don't use a ThreadsListHandle here because the current thread
2982 // must be alive.
2983 oop java_thread = JNIHandles::resolve_non_null(jthread);
2984 JavaThread* thr = java_lang_Thread::thread(java_thread);
2985 if (thread == thr && !thr->has_attached_via_jni()) {
2986 // Thread naming is only supported for the current thread and
2987 // we don't set the name of an attached thread to avoid stepping
2988 // on other programs.
2989 ResourceMark rm(thread);
2990 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2991 os::set_native_thread_name(thread_name);
2992 }
2993 JVM_END
2994
2995 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
2996 oop theCache = thread->scopedValueCache();
2997 return JNIHandles::make_local(THREAD, theCache);
2998 JVM_END
2999
3000 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3001 jobject theCache))
3002 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3003 thread->set_scopedValueCache(objs);
3004 JVM_END
3005
3006 // java.lang.Package ////////////////////////////////////////////////////////////////
3007
3008
3009 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3010 ResourceMark rm(THREAD);
3011 JvmtiVMObjectAllocEventCollector oam;
3012 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3013 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3014 return (jstring) JNIHandles::make_local(THREAD, result);
3015 JVM_END
3016
3017
3018 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3019 JvmtiVMObjectAllocEventCollector oam;
3020 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3021 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3022 JVM_END
3023
3024
3025 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3026
3027
3028 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3029 MonitorLocker ml(Heap_lock);
3030 oop ref = Universe::reference_pending_list();
3031 if (ref != nullptr) {
3032 Universe::clear_reference_pending_list();
3033 }
3034 return JNIHandles::make_local(THREAD, ref);
3035 JVM_END
3036
3037 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3038 MonitorLocker ml(Heap_lock);
3039 return Universe::has_reference_pending_list();
3040 JVM_END
3041
3042 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3043 MonitorLocker ml(Heap_lock);
3044 while (!Universe::has_reference_pending_list()) {
3045 ml.wait();
3046 }
3047 JVM_END
3048
3049 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3050 oop ref_oop = JNIHandles::resolve_non_null(ref);
3051 // PhantomReference has it's own implementation of refersTo().
3052 // See: JVM_PhantomReferenceRefersTo
3053 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3054 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3055 return referent == JNIHandles::resolve(o);
3056 JVM_END
3057
3058 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3059 oop ref_oop = JNIHandles::resolve_non_null(ref);
3060 // FinalReference has it's own implementation of clear().
3061 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3062 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3063 // If the referent has already been cleared then done.
3064 // However, if the referent is dead but has not yet been cleared by
3065 // concurrent reference processing, it should NOT be cleared here.
3066 // Instead, clearing should be left to the GC. Clearing it here could
3067 // detectably lose an expected notification, which is impossible with
3068 // STW reference processing. The clearing in enqueue() doesn't have
3069 // this problem, since the enqueue covers the notification, but it's not
3070 // worth the effort to handle that case specially.
3071 return;
3072 }
3073 java_lang_ref_Reference::clear_referent(ref_oop);
3074 JVM_END
3075
3076
3077 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3078
3079
3080 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3081 oop ref_oop = JNIHandles::resolve_non_null(ref);
3082 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3083 return referent == JNIHandles::resolve(o);
3084 JVM_END
3085
3086
3087 // ObjectInputStream ///////////////////////////////////////////////////////////////
3088
3089 // Return the first user-defined class loader up the execution stack, or null
3090 // if only code from the bootstrap or platform class loader is on the stack.
3091
3092 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3093 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3094 InstanceKlass* ik = vfst.method()->method_holder();
3095 oop loader = ik->class_loader();
3096 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3097 return JNIHandles::make_local(THREAD, loader);
3098 }
3099 }
3100 return nullptr;
3101 JVM_END
3102
3103
3104 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3105
3106
3107 // resolve array handle and check arguments
3108 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3109 if (arr == nullptr) {
3110 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3111 }
3112 oop a = JNIHandles::resolve_non_null(arr);
3113 if (!a->is_array()) {
3114 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3115 } else if (type_array_only && !a->is_typeArray()) {
3116 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3117 }
3118 return arrayOop(a);
3119 }
3120
3121
3122 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3123 arrayOop a = check_array(env, arr, false, CHECK_0);
3124 return a->length();
3125 JVM_END
3126
3127
3128 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3129 JvmtiVMObjectAllocEventCollector oam;
3130 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3131 jvalue value;
3132 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3133 oop box = Reflection::box(&value, type, CHECK_NULL);
3134 return JNIHandles::make_local(THREAD, box);
3135 JVM_END
3136
3137
3138 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3139 jvalue value;
3140 value.i = 0; // to initialize value before getting used in CHECK
3141 arrayOop a = check_array(env, arr, true, CHECK_(value));
3142 assert(a->is_typeArray(), "just checking");
3143 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3144 BasicType wide_type = (BasicType) wCode;
3145 if (type != wide_type) {
3146 Reflection::widen(&value, type, wide_type, CHECK_(value));
3147 }
3148 return value;
3149 JVM_END
3150
3151
3152 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3153 arrayOop a = check_array(env, arr, false, CHECK);
3154 oop box = JNIHandles::resolve(val);
3155 jvalue value;
3156 value.i = 0; // to initialize value before getting used in CHECK
3157 BasicType value_type;
3158 if (a->is_objArray()) {
3159 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3160 value_type = Reflection::unbox_for_regular_object(box, &value);
3161 } else {
3162 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3163 }
3164 Reflection::array_set(&value, a, index, value_type, CHECK);
3165 JVM_END
3166
3167
3168 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3169 arrayOop a = check_array(env, arr, true, CHECK);
3170 assert(a->is_typeArray(), "just checking");
3171 BasicType value_type = (BasicType) vCode;
3172 Reflection::array_set(&v, a, index, value_type, CHECK);
3173 JVM_END
3174
3175
3176 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3177 JvmtiVMObjectAllocEventCollector oam;
3178 oop element_mirror = JNIHandles::resolve(eltClass);
3179 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3180 return JNIHandles::make_local(THREAD, result);
3181 JVM_END
3182
3183
3184 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3185 JvmtiVMObjectAllocEventCollector oam;
3186 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3187 oop element_mirror = JNIHandles::resolve(eltClass);
3188 assert(dim_array->is_typeArray(), "just checking");
3189 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3190 return JNIHandles::make_local(THREAD, result);
3191 JVM_END
3192
3193
3194 // Library support ///////////////////////////////////////////////////////////////////////////
3195
3196 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3197 return ZipLibrary::handle();
3198 JVM_END
3199
3200 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3201 //%note jvm_ct
3202 char ebuf[1024];
3203 void *load_result;
3204 {
3205 ThreadToNativeFromVM ttnfvm(thread);
3206 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3207 }
3208 if (load_result == nullptr) {
3209 if (throwException) {
3210 char msg[1024];
3211 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3212 // Since 'ebuf' may contain a string encoded using
3213 // platform encoding scheme, we need to pass
3214 // Exceptions::unsafe_to_utf8 to the new_exception method
3215 // as the last argument. See bug 6367357.
3216 Handle h_exception =
3217 Exceptions::new_exception(thread,
3218 vmSymbols::java_lang_UnsatisfiedLinkError(),
3219 msg, Exceptions::unsafe_to_utf8);
3220
3221 THROW_HANDLE_NULL(h_exception);
3222 } else {
3223 log_info(library)("Failed to load library %s", name);
3224 return load_result;
3225 }
3226 }
3227 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3228 return load_result;
3229 JVM_END
3230
3231
3232 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3233 os::dll_unload(handle);
3234 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3235 JVM_END
3236
3237
3238 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3239 void* find_result = os::dll_lookup(handle, name);
3240 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3241 find_result != nullptr ? "Found" : "Failed to find",
3242 name, p2i(handle));
3243 return find_result;
3244 JVM_END
3245
3246
3247 // JNI version ///////////////////////////////////////////////////////////////////////////////
3248
3249 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3250 return Threads::is_supported_jni_version_including_1_1(version);
3251 JVM_END
3252
3253
3254 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3255 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3256 JVM_END
3257
3258 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3259 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3260 JVM_END
3261
3262 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3263 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3264 JVM_END
3265
3266 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3267 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3268 JVM_END
3269
3270 // String support ///////////////////////////////////////////////////////////////////////////
3271
3272 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3273 JvmtiVMObjectAllocEventCollector oam;
3274 if (str == nullptr) return nullptr;
3275 oop string = JNIHandles::resolve_non_null(str);
3276 oop result = StringTable::intern(string, CHECK_NULL);
3277 return (jstring) JNIHandles::make_local(THREAD, result);
3278 JVM_END
3279
3280
3281 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3282
3283 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3284 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3285 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3286 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3287 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3288 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3289
3290
3291 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3292 VM_Exit::block_if_vm_exited();
3293 return new PlatformMutex();
3294 }
3295
3296
3297 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3298 VM_Exit::block_if_vm_exited();
3299 delete ((PlatformMutex*) mon);
3300 }
3301
3302
3303 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3304 VM_Exit::block_if_vm_exited();
3305 ((PlatformMutex*) mon)->lock();
3306 return 0;
3307 }
3308
3309
3310 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3311 VM_Exit::block_if_vm_exited();
3312 ((PlatformMutex*) mon)->unlock();
3313 }
3314
3315
3316 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3317
3318 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3319 Handle loader, jboolean throwError, TRAPS) {
3320 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3321
3322 // Check if we should initialize the class
3323 if (init && klass->is_instance_klass()) {
3324 klass->initialize(CHECK_NULL);
3325 }
3326 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3327 }
3328
3329
3330 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3331
3332 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3333 Handle method_handle;
3334 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3335 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3336 Handle receiver(THREAD, JNIHandles::resolve(obj));
3337 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3338 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3339 jobject res = JNIHandles::make_local(THREAD, result);
3340 if (JvmtiExport::should_post_vm_object_alloc()) {
3341 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3342 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3343 if (java_lang_Class::is_primitive(ret_type)) {
3344 // Only for primitive type vm allocates memory for java object.
3345 // See box() method.
3346 JvmtiExport::post_vm_object_alloc(thread, result);
3347 }
3348 }
3349 return res;
3350 } else {
3351 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3352 }
3353 JVM_END
3354
3355
3356 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3357 oop constructor_mirror = JNIHandles::resolve(c);
3358 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3359 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3360 jobject res = JNIHandles::make_local(THREAD, result);
3361 if (JvmtiExport::should_post_vm_object_alloc()) {
3362 JvmtiExport::post_vm_object_alloc(thread, result);
3363 }
3364 return res;
3365 JVM_END
3366
3367 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3369 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3370 JVM_END
3371
3372 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3373 jclass caller,
3374 jstring interfaceMethodName,
3375 jobject factoryType,
3376 jobject interfaceMethodType,
3377 jobject implementationMember,
3378 jobject dynamicMethodType,
3379 jclass lambdaProxyClass))
3380 #if INCLUDE_CDS
3381 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3382 return;
3383 }
3384
3385 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3386 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3387 if (caller_ik->is_hidden()) {
3388 // Hidden classes not of type lambda proxy classes are currently not being archived.
3389 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3390 // registered for archiving.
3391 return;
3392 }
3393 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass));
3394 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k);
3395 assert(lambda_ik->is_hidden(), "must be a hidden class");
3396 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3397
3398 Symbol* interface_method_name = nullptr;
3399 if (interfaceMethodName != nullptr) {
3400 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3401 }
3402 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3403 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3404
3405 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3406 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3407
3408 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3409 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3410 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3411
3412 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3413 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3414
3415 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3416 interface_method_type, m, dynamic_method_type, THREAD);
3417 #endif // INCLUDE_CDS
3418 JVM_END
3419
3420 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3421 jclass caller,
3422 jstring interfaceMethodName,
3423 jobject factoryType,
3424 jobject interfaceMethodType,
3425 jobject implementationMember,
3426 jobject dynamicMethodType))
3427 #if INCLUDE_CDS
3428
3429 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3430 implementationMember == nullptr || dynamicMethodType == nullptr) {
3431 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3432 }
3433
3434 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3435 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3436 if (!caller_ik->is_shared()) {
3437 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3438 return nullptr;
3439 }
3440
3441 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3442 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3443 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3444
3445 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3446 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3447
3448 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3449 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3450 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3451
3452 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3453 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3454
3455 InstanceKlass* loaded_lambda =
3456 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3457 interface_method_type, m, dynamic_method_type,
3458 CHECK_(nullptr));
3459 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3460 #else
3461 return nullptr;
3462 #endif // INCLUDE_CDS
3463 JVM_END
3464
3465 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3466 if (CDSConfig::is_dumping_static_archive()) {
3467 // We do this so that the default CDS archive can be deterministic.
3468 const char* release = VM_Version::vm_release();
3469 const char* dbg_level = VM_Version::jdk_debug_level();
3470 const char* version = VM_Version::internal_vm_info_string();
3471 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3472 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3473 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3474 seed += (jlong)VM_Version::vm_major_version();
3475 seed += (jlong)VM_Version::vm_minor_version();
3476 seed += (jlong)VM_Version::vm_security_version();
3477 seed += (jlong)VM_Version::vm_patch_version();
3478 if (seed == 0) { // don't let this ever be zero.
3479 seed = 0x87654321;
3480 }
3481 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3482 return seed;
3483 } else {
3484 return 0;
3485 }
3486 JVM_END
3487
3488 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3489 return CDSConfig::get_status();
3490 JVM_END
3491
3492 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3493 #if INCLUDE_CDS
3494 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3495 if (line != nullptr) {
3496 ResourceMark rm(THREAD);
3497 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3498 char* c_line = java_lang_String::as_utf8_string(h_line());
3499 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3500 // Note: LambdaFormInvokers::append take same format which is not
3501 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3502 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3503 }
3504 if (ClassListWriter::is_enabled()) {
3505 ClassListWriter w;
3506 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3507 }
3508 }
3509 #endif // INCLUDE_CDS
3510 JVM_END
3511
3512 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3513 #if INCLUDE_CDS
3514 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity");
3515
3516 ResourceMark rm(THREAD);
3517 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3518 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3519 oop loader_oop = JNIHandles::resolve(loader);
3520 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3521
3522 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3523 #endif // INCLUDE_CDS
3524 JVM_END
3525
3526 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3527 #if INCLUDE_CDS
3528 ResourceMark rm(THREAD);
3529 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3530 char* file_name = java_lang_String::as_utf8_string(file_handle());
3531 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3532 #endif // INCLUDE_CDS
3533 JVM_END
3534
3535 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3536 #if INCLUDE_CDS
3537 ResourceMark rm(THREAD);
3538 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3539 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3540 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3541 #endif // INCLUDE_CDS
3542 JVM_END
3543
3544 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3545 #if INCLUDE_CDS
3546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3547 if (!k->is_instance_klass()) {
3548 return false;
3549 } else {
3550 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3551 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3552 // This class will be cached in AOT-initialized state. No need for init barriers.
3553 return false;
3554 } else {
3555 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3556 // must emit barriers to ensure class initialization during production run.
3557 ResourceMark rm(THREAD);
3558 log_debug(cds)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3559 return true;
3560 }
3561 }
3562 #else
3563 return false;
3564 #endif // INCLUDE_CDS
3565 JVM_END
3566
3567 // Returns an array of all live Thread objects (VM internal JavaThreads,
3568 // jvmti agent threads, and JNI attaching threads are skipped)
3569 // See CR 6404306 regarding JNI attaching threads
3570 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3571 ResourceMark rm(THREAD);
3572 ThreadsListEnumerator tle(THREAD, false, false);
3573 JvmtiVMObjectAllocEventCollector oam;
3574
3575 int num_threads = tle.num_threads();
3576 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3577 objArrayHandle threads_ah(THREAD, r);
3578
3579 for (int i = 0; i < num_threads; i++) {
3580 Handle h = tle.get_threadObj(i);
3581 threads_ah->obj_at_put(i, h());
3582 }
3583
3584 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3585 JVM_END
3586
3587
3588 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3589 // Return StackTraceElement[][], each element is the stack trace of a thread in
3590 // the corresponding entry in the given threads array
3591 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3592 JvmtiVMObjectAllocEventCollector oam;
3593
3594 // Check if threads is null
3595 if (threads == nullptr) {
3596 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3597 }
3598
3599 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3600 objArrayHandle ah(THREAD, a);
3601 int num_threads = ah->length();
3602 // check if threads is non-empty array
3603 if (num_threads == 0) {
3604 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3605 }
3606
3607 // check if threads is not an array of objects of Thread class
3608 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3609 if (k != vmClasses::Thread_klass()) {
3610 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3611 }
3612
3613 ResourceMark rm(THREAD);
3614
3615 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3616 for (int i = 0; i < num_threads; i++) {
3617 oop thread_obj = ah->obj_at(i);
3618 instanceHandle h(THREAD, (instanceOop) thread_obj);
3619 thread_handle_array->append(h);
3620 }
3621
3622 // The JavaThread references in thread_handle_array are validated
3623 // in VM_ThreadDump::doit().
3624 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3625 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3626
3627 JVM_END
3628
3629 // JVM monitoring and management support
3630 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3631 return Management::get_jmm_interface(version);
3632 JVM_END
3633
3634 // com.sun.tools.attach.VirtualMachine agent properties support
3635 //
3636 // Initialize the agent properties with the properties maintained in the VM
3637 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3638 ResourceMark rm;
3639
3640 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3641
3642 PUTPROP(props, "sun.java.command", Arguments::java_command());
3643 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3644 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3645 return properties;
3646 JVM_END
3647
3648 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3649 {
3650 JvmtiVMObjectAllocEventCollector oam;
3651
3652 if (ofClass == nullptr) {
3653 return nullptr;
3654 }
3655 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3656 // Special handling for primitive objects
3657 if (java_lang_Class::is_primitive(mirror())) {
3658 return nullptr;
3659 }
3660 Klass* k = java_lang_Class::as_Klass(mirror());
3661 if (!k->is_instance_klass()) {
3662 return nullptr;
3663 }
3664 InstanceKlass* ik = InstanceKlass::cast(k);
3665 int encl_method_class_idx = ik->enclosing_method_class_index();
3666 if (encl_method_class_idx == 0) {
3667 return nullptr;
3668 }
3669 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3670 objArrayHandle dest(THREAD, dest_o);
3671 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3672 dest->obj_at_put(0, enc_k->java_mirror());
3673 int encl_method_method_idx = ik->enclosing_method_method_index();
3674 if (encl_method_method_idx != 0) {
3675 Symbol* sym = ik->constants()->symbol_at(
3676 extract_low_short_from_int(
3677 ik->constants()->name_and_type_at(encl_method_method_idx)));
3678 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3679 dest->obj_at_put(1, str());
3680 sym = ik->constants()->symbol_at(
3681 extract_high_short_from_int(
3682 ik->constants()->name_and_type_at(encl_method_method_idx)));
3683 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3684 dest->obj_at_put(2, str());
3685 }
3686 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3687 }
3688 JVM_END
3689
3690 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3691 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3692 ResourceMark rm(THREAD);
3693
3694 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3695 return nullptr;
3696 }
3697
3698 char** vm_flags = Arguments::jvm_flags_array();
3699 char** vm_args = Arguments::jvm_args_array();
3700 int num_flags = Arguments::num_jvm_flags();
3701 int num_args = Arguments::num_jvm_args();
3702
3703 InstanceKlass* ik = vmClasses::String_klass();
3704 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3705 objArrayHandle result_h(THREAD, r);
3706
3707 int index = 0;
3708 for (int j = 0; j < num_flags; j++, index++) {
3709 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3710 result_h->obj_at_put(index, h());
3711 }
3712 for (int i = 0; i < num_args; i++, index++) {
3713 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3714 result_h->obj_at_put(index, h());
3715 }
3716 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3717 JVM_END
3718
3719 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3720 return os::get_signal_number(name);
3721 JVM_END
3722
3723 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3724 #if INCLUDE_JVMTI
3725 if (!DoJVMTIVirtualThreadTransitions) {
3726 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3727 return;
3728 }
3729 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3730 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3731 } else {
3732 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3733 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3734 }
3735 #endif
3736 JVM_END
3737
3738 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3739 #if INCLUDE_JVMTI
3740 if (!DoJVMTIVirtualThreadTransitions) {
3741 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3742 return;
3743 }
3744 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3745 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3746 } else {
3747 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3748 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3749 }
3750 #endif
3751 JVM_END
3752
3753 // If notifications are disabled then just update the VTMS transition bit and return.
3754 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3755 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3756 #if INCLUDE_JVMTI
3757 if (!DoJVMTIVirtualThreadTransitions) {
3758 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3759 return;
3760 }
3761 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3762 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3763 } else {
3764 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3765 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3766 }
3767 #endif
3768 JVM_END
3769
3770 // If notifications are disabled then just update the VTMS transition bit and return.
3771 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3772 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3773 #if INCLUDE_JVMTI
3774 if (!DoJVMTIVirtualThreadTransitions) {
3775 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3776 return;
3777 }
3778 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3779 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3780 } else {
3781 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3782 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3783 }
3784 #endif
3785 JVM_END
3786
3787 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3788 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3789 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3790 #if INCLUDE_JVMTI
3791 if (!DoJVMTIVirtualThreadTransitions) {
3792 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3793 return;
3794 }
3795 assert(thread->is_disable_suspend() != (bool)enter,
3796 "nested or unbalanced monitor enter/exit is not allowed");
3797 thread->toggle_is_disable_suspend();
3798 #endif
3799 JVM_END
3800
3801 JVM_ENTRY(void, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3802 #if INCLUDE_JFR
3803 freeze_result result = THREAD->last_freeze_fail_result();
3804 assert(result != freeze_ok, "sanity check");
3805 EventVirtualThreadPinned event(UNTIMED);
3806 event.set_starttime(THREAD->last_freeze_fail_time());
3807 if (event.should_commit()) {
3808 ResourceMark rm(THREAD);
3809 const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3810 THREAD->post_vthread_pinned_event(&event, str, result);
3811 }
3812 #endif
3813 JVM_END
3814
3815 JVM_ENTRY(jobject, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3816 ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3817 assert(parkEvent != nullptr, "not initialized");
3818
3819 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3820 oop vthread_head = nullptr;
3821 while (true) {
3822 if (list_head.peek() != nullptr) {
3823 for (;;) {
3824 oop head = list_head.resolve();
3825 if (list_head.cmpxchg(head, nullptr) == head) {
3826 return JNIHandles::make_local(THREAD, head);
3827 }
3828 }
3829 }
3830 ThreadBlockInVM tbivm(THREAD);
3831 parkEvent->park();
3832 }
3833 JVM_END
3834 /*
3835 * Return the current class's class file version. The low order 16 bits of the
3836 * returned jint contain the class's major version. The high order 16 bits
3837 * contain the class's minor version.
3838 */
3839 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3840 oop mirror = JNIHandles::resolve_non_null(current);
3841 if (java_lang_Class::is_primitive(mirror)) {
3842 // return latest major version and minor version of 0.
3843 return JVM_CLASSFILE_MAJOR_VERSION;
3844 }
3845 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
3846
3847 Klass* c = java_lang_Class::as_Klass(mirror);
3848 assert(c->is_instance_klass(), "must be");
3849 InstanceKlass* ik = InstanceKlass::cast(c);
3850 return (ik->minor_version() << 16) | ik->major_version();
3851 JVM_END
3852
3853 /*
3854 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3855 * get the value will see a materialized value and not a scalar-replaced
3856 * null value.
3857 */
3858 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3859 JVM_EnsureMaterializedForStackWalk(env, value);
3860 JVM_END
3861
3862 /*
3863 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3864 */
3865 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3866 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3867 JVM_END
3868
3869 #define DO_COUNTERS(macro) \
3870 macro(JVM_CurrentTimeMillis) \
3871 macro(JVM_NanoTime) \
3872 macro(JVM_GetNanoTimeAdjustment) \
3873 macro(JVM_ArrayCopy) \
3874 macro(JVM_GetProperties) \
3875 macro(JVM_GetTemporaryDirectory) \
3876 macro(JVM_BeforeHalt) \
3877 macro(JVM_Halt) \
3878 macro(JVM_GC) \
3879 macro(JVM_MaxObjectInspectionAge) \
3880 macro(JVM_TotalMemory) \
3881 macro(JVM_FreeMemory) \
3882 macro(JVM_MaxMemory) \
3883 macro(JVM_ActiveProcessorCount) \
3884 macro(JVM_IsUseContainerSupport) \
3885 macro(JVM_FillInStackTrace) \
3886 macro(JVM_GetExtendedNPEMessage) \
3887 macro(JVM_InitStackTraceElementArray) \
3888 macro(JVM_InitStackTraceElement) \
3889 macro(JVM_ExpandStackFrameInfo) \
3890 macro(JVM_CallStackWalk) \
3891 macro(JVM_MoreStackWalk) \
3892 macro(JVM_SetStackWalkContinuation) \
3893 macro(JVM_IHashCode) \
3894 macro(JVM_MonitorWait) \
3895 macro(JVM_MonitorNotify) \
3896 macro(JVM_MonitorNotifyAll) \
3897 macro(JVM_Clone) \
3898 macro(JVM_ReportFinalizationComplete) \
3899 macro(JVM_IsFinalizationEnabled) \
3900 macro(JVM_RegisterContinuationMethods) \
3901 macro(JVM_NativePath) \
3902 macro(JVM_GetCallerClass) \
3903 macro(JVM_FindPrimitiveClass) \
3904 macro(JVM_FindClassFromBootLoader) \
3905 macro(JVM_FindClassFromCaller) \
3906 macro(JVM_FindClassFromClass) \
3907 macro(JVM_DefineClass) \
3908 macro(JVM_LookupDefineClass) \
3909 macro(JVM_DefineClassWithSource) \
3910 macro(JVM_FindLoadedClass) \
3911 macro(JVM_DefineModule) \
3912 macro(JVM_SetBootLoaderUnnamedModule) \
3913 macro(JVM_AddModuleExports) \
3914 macro(JVM_AddModuleExportsToAllUnnamed) \
3915 macro(JVM_AddModuleExportsToAll) \
3916 macro(JVM_AddReadsModule) \
3917 macro(JVM_DefineArchivedModules) \
3918 macro(JVM_InitClassName) \
3919 macro(JVM_GetClassInterfaces) \
3920 macro(JVM_IsInterface) \
3921 macro(JVM_IsHiddenClass) \
3922 macro(JVM_FindScopedValueBindings) \
3923 macro(JVM_GetDeclaredClasses) \
3924 macro(JVM_GetDeclaringClass) \
3925 macro(JVM_GetSimpleBinaryName) \
3926 macro(JVM_GetClassSignature) \
3927 macro(JVM_GetClassAnnotations) \
3928 macro(JVM_GetClassTypeAnnotations) \
3929 macro(JVM_GetMethodTypeAnnotations) \
3930 macro(JVM_GetFieldTypeAnnotations) \
3931 macro(JVM_GetMethodParameters) \
3932 macro(JVM_GetClassDeclaredFields) \
3933 macro(JVM_IsRecord) \
3934 macro(JVM_GetRecordComponents) \
3935 macro(JVM_GetClassDeclaredMethods) \
3936 macro(JVM_GetClassDeclaredConstructors) \
3937 macro(JVM_GetClassAccessFlags) \
3938 macro(JVM_AreNestMates) \
3939 macro(JVM_GetNestHost) \
3940 macro(JVM_GetNestMembers) \
3941 macro(JVM_GetPermittedSubclasses) \
3942 macro(JVM_GetClassConstantPool) \
3943 macro(JVM_ConstantPoolGetSize) \
3944 macro(JVM_ConstantPoolGetClassAt) \
3945 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3946 macro(JVM_ConstantPoolGetMethodAt) \
3947 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3948 macro(JVM_ConstantPoolGetFieldAt) \
3949 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3950 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3951 macro(JVM_ConstantPoolGetClassRefIndexAt) \
3952 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3953 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3954 macro(JVM_ConstantPoolGetIntAt) \
3955 macro(JVM_ConstantPoolGetLongAt) \
3956 macro(JVM_ConstantPoolGetFloatAt) \
3957 macro(JVM_ConstantPoolGetDoubleAt) \
3958 macro(JVM_ConstantPoolGetStringAt) \
3959 macro(JVM_ConstantPoolGetUTF8At) \
3960 macro(JVM_ConstantPoolGetTagAt) \
3961 macro(JVM_DesiredAssertionStatus) \
3962 macro(JVM_AssertionStatusDirectives) \
3963 macro(JVM_GetClassNameUTF) \
3964 macro(JVM_GetClassCPTypes) \
3965 macro(JVM_GetClassCPEntriesCount) \
3966 macro(JVM_GetClassFieldsCount) \
3967 macro(JVM_GetClassMethodsCount) \
3968 macro(JVM_GetMethodIxExceptionIndexes) \
3969 macro(JVM_GetMethodIxExceptionsCount) \
3970 macro(JVM_GetMethodIxByteCode) \
3971 macro(JVM_GetMethodIxByteCodeLength) \
3972 macro(JVM_GetMethodIxExceptionTableEntry) \
3973 macro(JVM_GetMethodIxExceptionTableLength) \
3974 macro(JVM_GetMethodIxModifiers) \
3975 macro(JVM_GetFieldIxModifiers) \
3976 macro(JVM_GetMethodIxLocalsCount) \
3977 macro(JVM_GetMethodIxArgsSize) \
3978 macro(JVM_GetMethodIxMaxStack) \
3979 macro(JVM_IsConstructorIx) \
3980 macro(JVM_IsVMGeneratedMethodIx) \
3981 macro(JVM_GetMethodIxNameUTF) \
3982 macro(JVM_GetMethodIxSignatureUTF) \
3983 macro(JVM_GetCPFieldNameUTF) \
3984 macro(JVM_GetCPMethodNameUTF) \
3985 macro(JVM_GetCPMethodSignatureUTF) \
3986 macro(JVM_GetCPFieldSignatureUTF) \
3987 macro(JVM_GetCPClassNameUTF) \
3988 macro(JVM_GetCPFieldClassNameUTF) \
3989 macro(JVM_GetCPMethodClassNameUTF) \
3990 macro(JVM_GetCPFieldModifiers) \
3991 macro(JVM_GetCPMethodModifiers) \
3992 macro(JVM_ReleaseUTF) \
3993 macro(JVM_IsSameClassPackage) \
3994 macro(JVM_StartThread) \
3995 macro(JVM_SetThreadPriority) \
3996 macro(JVM_Yield) \
3997 macro(JVM_SleepNanos) \
3998 macro(JVM_CurrentCarrierThread) \
3999 macro(JVM_CurrentThread) \
4000 macro(JVM_SetCurrentThread) \
4001 macro(JVM_GetNextThreadIdOffset) \
4002 macro(JVM_Interrupt) \
4003 macro(JVM_HoldsLock) \
4004 macro(JVM_GetStackTrace) \
4005 macro(JVM_SetNativeThreadName) \
4006 macro(JVM_ScopedValueCache) \
4007 macro(JVM_SetScopedValueCache) \
4008 macro(JVM_GetSystemPackage) \
4009 macro(JVM_GetSystemPackages) \
4010 macro(JVM_GetAndClearReferencePendingList) \
4011 macro(JVM_HasReferencePendingList) \
4012 macro(JVM_WaitForReferencePendingList) \
4013 macro(JVM_ReferenceRefersTo) \
4014 macro(JVM_ReferenceClear) \
4015 macro(JVM_PhantomReferenceRefersTo) \
4016 macro(JVM_LatestUserDefinedLoader) \
4017 macro(JVM_GetArrayLength) \
4018 macro(JVM_GetArrayElement) \
4019 macro(JVM_GetPrimitiveArrayElement) \
4020 macro(JVM_SetArrayElement) \
4021 macro(JVM_SetPrimitiveArrayElement) \
4022 macro(JVM_NewArray) \
4023 macro(JVM_NewMultiArray) \
4024 macro(JVM_LoadZipLibrary) \
4025 macro(JVM_LoadLibrary) \
4026 macro(JVM_UnloadLibrary) \
4027 macro(JVM_FindLibraryEntry) \
4028 macro(JVM_IsSupportedJNIVersion) \
4029 macro(JVM_IsPreviewEnabled) \
4030 macro(JVM_IsContinuationsSupported) \
4031 macro(JVM_IsForeignLinkerSupported) \
4032 macro(JVM_InternString) \
4033 macro(JVM_InvokeMethod) \
4034 macro(JVM_NewInstanceFromConstructor) \
4035 macro(JVM_InitializeFromArchive) \
4036 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4037 macro(JVM_LookupLambdaProxyClassFromArchive) \
4038 macro(JVM_GetRandomSeedForDumping) \
4039 macro(JVM_LogLambdaFormInvoker) \
4040 macro(JVM_LogDynamicProxy) \
4041 macro(JVM_DumpClassListToFile) \
4042 macro(JVM_DumpDynamicArchive) \
4043 macro(JVM_GetAllThreads) \
4044 macro(JVM_DumpThreads) \
4045 macro(JVM_GetManagement) \
4046 macro(JVM_InitAgentProperties) \
4047 macro(JVM_GetEnclosingMethodInfo) \
4048 macro(JVM_GetVmArguments) \
4049 macro(JVM_FindSignal) \
4050 macro(JVM_VirtualThreadStart) \
4051 macro(JVM_VirtualThreadEnd) \
4052 macro(JVM_VirtualThreadMount) \
4053 macro(JVM_VirtualThreadUnmount) \
4054 macro(JVM_GetClassFileVersion) \
4055 macro(JVM_EnsureMaterializedForStackWalk_func) \
4056 macro(JVM_PrintWarningAtDynamicAgentLoad)
4057
4058 #define INIT_COUNTER(name) \
4059 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4060 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4061
4062 void perf_jvm_init() {
4063 if (ProfileVMCalls && UsePerfData) {
4064 EXCEPTION_MARK;
4065
4066 DO_COUNTERS(INIT_COUNTER)
4067
4068 if (HAS_PENDING_EXCEPTION) {
4069 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4070 }
4071 }
4072 }
4073
4074 #undef INIT_COUNTER
4075
4076 #define PRINT_COUNTER(name) {\
4077 jlong count = _perf_##name##_count->get_value(); \
4078 if (count > 0) { \
4079 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
4080 #name, \
4081 _perf_##name##_timer->elapsed_counter_value_us(), \
4082 _perf_##name##_timer->thread_counter_value_us(), count); \
4083 }}
4084
4085 void perf_jvm_print_on(outputStream* st) {
4086 if (ProfileVMCalls && UsePerfData) {
4087 DO_COUNTERS(PRINT_COUNTER)
4088 } else {
4089 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4090 }
4091 }
4092
4093 #undef PRINT_COUNTER