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 "precompiled.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 "classfile/classFileStream.hpp"
34 #include "classfile/classLoader.inline.hpp"
35 #include "classfile/classLoaderData.hpp"
36 #include "classfile/classLoaderData.inline.hpp"
37 #include "classfile/classLoadInfo.hpp"
38 #include "classfile/javaAssertions.hpp"
39 #include "classfile/javaClasses.inline.hpp"
40 #include "classfile/moduleEntry.hpp"
41 #include "classfile/modules.hpp"
42 #include "classfile/packageEntry.hpp"
43 #include "classfile/stringTable.hpp"
44 #include "classfile/symbolTable.hpp"
45 #include "classfile/systemDictionary.hpp"
46 #include "classfile/vmClasses.hpp"
47 #include "classfile/vmSymbols.hpp"
48 #include "gc/shared/collectedHeap.inline.hpp"
49 #include "interpreter/bytecode.hpp"
50 #include "interpreter/bytecodeUtils.hpp"
51 #include "jfr/jfrEvents.hpp"
52 #include "jvm.h"
53 #include "logging/log.hpp"
54 #include "memory/oopFactory.hpp"
55 #include "memory/referenceType.hpp"
56 #include "memory/resourceArea.hpp"
57 #include "memory/universe.hpp"
58 #include "oops/access.inline.hpp"
59 #include "oops/constantPool.hpp"
60 #include "oops/fieldStreams.inline.hpp"
61 #include "oops/instanceKlass.hpp"
62 #include "oops/klass.inline.hpp"
63 #include "oops/method.hpp"
64 #include "oops/recordComponent.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "prims/foreignGlobals.hpp"
69 #include "prims/jvm_misc.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/jvmtiThreadState.inline.hpp"
72 #include "prims/stackwalk.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/atomic.hpp"
75 #include "runtime/continuation.hpp"
76 #include "runtime/globals_extension.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/deoptimization.hpp"
81 #include "runtime/handshake.hpp"
82 #include "runtime/java.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.hpp"
85 #include "runtime/jfieldIDWorkaround.hpp"
86 #include "runtime/jniHandles.inline.hpp"
87 #include "runtime/os.inline.hpp"
88 #include "runtime/osThread.hpp"
89 #include "runtime/perfData.inline.hpp"
90 #include "runtime/reflection.hpp"
91 #include "runtime/synchronizer.hpp"
92 #include "runtime/threadIdentifier.hpp"
93 #include "runtime/threadSMR.hpp"
94 #include "runtime/vframe.inline.hpp"
95 #include "runtime/vmOperations.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "services/attachListener.hpp"
98 #include "services/management.hpp"
99 #include "services/threadService.hpp"
100 #include "utilities/checkedCast.hpp"
101 #include "utilities/copy.hpp"
102 #include "utilities/defaultStream.hpp"
103 #include "utilities/dtrace.hpp"
104 #include "utilities/events.hpp"
105 #include "utilities/macros.hpp"
106 #include "utilities/utf8.hpp"
107 #include "utilities/zipLibrary.hpp"
108 #if INCLUDE_CDS
109 #include "classfile/systemDictionaryShared.hpp"
110 #endif
111 #if INCLUDE_JFR
112 #include "jfr/jfr.hpp"
113 #endif
114 #if INCLUDE_MANAGEMENT
115 #include "services/finalizerService.hpp"
116 #endif
117 #ifdef LINUX
118 #include "osContainer_linux.hpp"
119 #endif
120
121 #include <errno.h>
122
123 /*
124 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
125 such ctors and calls MUST NOT come between an oop declaration/init and its
126 usage because if objects are move this may cause various memory stomps, bus
127 errors and segfaults. Here is a cookbook for causing so called "naked oop
128 failures":
129
130 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
131 // Object address to be held directly in mirror & not visible to GC
132 oop mirror = JNIHandles::resolve_non_null(ofClass);
133
134 // If this ctor can hit a safepoint, moving objects around, then
135 ComplexConstructor foo;
136
137 // Boom! mirror may point to JUNK instead of the intended object
138 (some dereference of mirror)
139
140 // Here's another call that may block for GC, making mirror stale
141 MutexLocker ml(some_lock);
142
143 // And here's an initializer that can result in a stale oop
144 // all in one step.
145 oop o = call_that_can_throw_exception(TRAPS);
146
147
148 The solution is to keep the oop declaration BELOW the ctor or function
149 call that might cause a GC, do another resolve to reassign the oop, or
150 consider use of a Handle instead of an oop so there is immunity from object
151 motion. But note that the "QUICK" entries below do not have a handlemark
152 and thus can only support use of handles passed in.
153 */
154
155 extern void trace_class_resolution(Klass* to_class) {
156 ResourceMark rm;
157 int line_number = -1;
158 const char * source_file = nullptr;
159 const char * trace = "explicit";
160 InstanceKlass* caller = nullptr;
161 JavaThread* jthread = JavaThread::current();
162 if (jthread->has_last_Java_frame()) {
163 vframeStream vfst(jthread);
164
165 // Scan up the stack skipping ClassLoader frames.
166 Method* last_caller = nullptr;
167
168 while (!vfst.at_end()) {
169 Method* m = vfst.method();
170 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())) {
171 break;
172 }
173 last_caller = m;
174 vfst.next();
175 }
176 // if this is called from Class.forName0 and that is called from Class.forName,
177 // then print the caller of Class.forName. If this is Class.loadClass, then print
178 // that caller, otherwise keep quiet since this should be picked up elsewhere.
179 bool found_it = false;
180 if (!vfst.at_end() &&
181 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
182 vfst.method()->name() == vmSymbols::forName0_name()) {
183 vfst.next();
184 if (!vfst.at_end() &&
185 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
186 vfst.method()->name() == vmSymbols::forName_name()) {
187 vfst.next();
188 found_it = true;
189 }
190 } else if (last_caller != nullptr &&
191 last_caller->method_holder()->name() ==
192 vmSymbols::java_lang_ClassLoader() &&
193 last_caller->name() == vmSymbols::loadClass_name()) {
194 found_it = true;
195 } else if (!vfst.at_end()) {
196 if (vfst.method()->is_native()) {
197 // JNI call
198 found_it = true;
199 }
200 }
201 if (found_it && !vfst.at_end()) {
202 // found the caller
203 caller = vfst.method()->method_holder();
204 line_number = vfst.method()->line_number_from_bci(vfst.bci());
205 if (line_number == -1) {
206 // show method name if it's a native method
207 trace = vfst.method()->name_and_sig_as_C_string();
208 }
209 Symbol* s = caller->source_file_name();
210 if (s != nullptr) {
211 source_file = s->as_C_string();
212 }
213 }
214 }
215 if (caller != nullptr) {
216 if (to_class != caller) {
217 const char * from = caller->external_name();
218 const char * to = to_class->external_name();
219 // print in a single call to reduce interleaving between threads
220 if (source_file != nullptr) {
221 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
222 } else {
223 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
224 }
225 }
226 }
227 }
228
229 // java.lang.System //////////////////////////////////////////////////////////////////////
230
231
232 JVM_LEAF_PROF(jboolean, JVM_AOTIsTraining, JVM_AOTIsTraining(JNIEnv *env))
233 #if INCLUDE_CDS
234 return MetaspaceShared::is_recording_preimage_static_archive();
235 #else
236 return JNI_FALSE;
237 #endif // INCLUDE_CDS
238 JVM_END
239
240 JVM_ENTRY_PROF(void, JVM_AOTEndTraining, JVM_AOTEndTraining(JNIEnv *env))
241 #if INCLUDE_CDS
242 if (MetaspaceShared::is_recording_preimage_static_archive()) {
243 MetaspaceShared::preload_and_dump(THREAD);
244 }
245 #endif // INCLUDE_CDS
246 JVM_END
247
248 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
249 return os::javaTimeMillis();
250 JVM_END
251
252 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
253 return os::javaTimeNanos();
254 JVM_END
255
256 // The function below is actually exposed by jdk.internal.misc.VM and not
257 // java.lang.System, but we choose to keep it here so that it stays next
258 // to JVM_CurrentTimeMillis and JVM_NanoTime
259
260 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
261 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
262
263 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
264 jlong seconds;
265 jlong nanos;
266
267 os::javaTimeSystemUTC(seconds, nanos);
268
269 // We're going to verify that the result can fit in a long.
270 // For that we need the difference in seconds between 'seconds'
271 // and 'offset_secs' to be such that:
272 // |seconds - offset_secs| < (2^63/10^9)
273 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
274 // which makes |seconds - offset_secs| < 2^33
275 // and we will prefer +/- 2^32 as the maximum acceptable diff
276 // as 2^32 has a more natural feel than 2^33...
277 //
278 // So if |seconds - offset_secs| >= 2^32 - we return a special
279 // sentinel value (-1) which the caller should take as an
280 // exception value indicating that the offset given to us is
281 // too far from range of the current time - leading to too big
282 // a nano adjustment. The caller is expected to recover by
283 // computing a more accurate offset and calling this method
284 // again. (For the record 2^32 secs is ~136 years, so that
285 // should rarely happen)
286 //
287 jlong diff = seconds - offset_secs;
288 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
289 return -1; // sentinel value: the offset is too far off the target
290 }
291
292 // return the adjustment. If you compute a time by adding
293 // this number of nanoseconds along with the number of seconds
294 // in the offset you should get the current UTC time.
295 return (diff * (jlong)1000000000) + nanos;
296 JVM_END
297
298 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
299 jobject dst, jint dst_pos, jint length))
300 // Check if we have null pointers
301 if (src == nullptr || dst == nullptr) {
302 THROW(vmSymbols::java_lang_NullPointerException());
303 }
304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
306 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
307 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
308 // Do copy
309 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
310 JVM_END
311
312
313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
314 JavaValue r(T_OBJECT);
315 // public synchronized Object put(Object key, Object value);
316 HandleMark hm(THREAD);
317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
319 JavaCalls::call_virtual(&r,
320 props,
321 vmClasses::Properties_klass(),
322 vmSymbols::put_name(),
323 vmSymbols::object_object_object_signature(),
324 key_str,
325 value_str,
326 THREAD);
327 }
328
329
330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
331
332 /*
333 * Return all of the system properties in a Java String array with alternating
334 * names and values from the jvm SystemProperty.
335 * Which includes some internal and all commandline -D defined properties.
336 */
337 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
338 ResourceMark rm(THREAD);
339 HandleMark hm(THREAD);
340 int ndx = 0;
341 int fixedCount = 2;
342
343 SystemProperty* p = Arguments::system_properties();
344 int count = Arguments::PropertyList_count(p);
345
346 // Allocate result String array
347 InstanceKlass* ik = vmClasses::String_klass();
348 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
349 objArrayHandle result_h(THREAD, r);
350
351 while (p != nullptr) {
352 const char * key = p->key();
353 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
354 const char * value = p->value();
355 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
356 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
357 result_h->obj_at_put(ndx * 2, key_str());
358 result_h->obj_at_put(ndx * 2 + 1, value_str());
359 ndx++;
360 }
361 p = p->next();
362 }
363
364 // Convert the -XX:MaxDirectMemorySize= command line flag
365 // to the sun.nio.MaxDirectMemorySize property.
366 // Do this after setting user properties to prevent people
367 // from setting the value with a -D option, as requested.
368 // Leave empty if not supplied
369 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
370 char as_chars[256];
371 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
372 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
373 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
374 result_h->obj_at_put(ndx * 2, key_str());
375 result_h->obj_at_put(ndx * 2 + 1, value_str());
376 ndx++;
377 }
378
379 // JVM monitoring and management support
380 // Add the sun.management.compiler property for the compiler's name
381 {
382 #undef CSIZE
383 #if defined(_LP64)
384 #define CSIZE "64-Bit "
385 #else
386 #define CSIZE
387 #endif // 64bit
388
389 #if COMPILER1_AND_COMPILER2
390 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
391 #else
392 #if defined(COMPILER1)
393 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
394 #elif defined(COMPILER2)
395 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
396 #elif INCLUDE_JVMCI
397 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
398 #else
399 const char* compiler_name = "";
400 #endif // compilers
401 #endif // COMPILER1_AND_COMPILER2
402
403 if (*compiler_name != '\0' &&
404 (Arguments::mode() != Arguments::_int)) {
405 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
406 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
407 result_h->obj_at_put(ndx * 2, key_str());
408 result_h->obj_at_put(ndx * 2 + 1, value_str());
409 ndx++;
410 }
411 }
412
413 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
414 JVM_END
415
416
417 /*
418 * Return the temporary directory that the VM uses for the attach
419 * and perf data files.
420 *
421 * It is important that this directory is well-known and the
422 * same for all VM instances. It cannot be affected by configuration
423 * variables such as java.io.tmpdir.
424 */
425 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
426 HandleMark hm(THREAD);
427 const char* temp_dir = os::get_temp_directory();
428 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
429 return (jstring) JNIHandles::make_local(THREAD, h());
430 JVM_END
431
432
433 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
434
435 extern volatile jint vm_created;
436
437 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
438 EventShutdown event;
439 if (event.should_commit()) {
440 event.set_reason("Shutdown requested from Java");
441 event.commit();
442 }
443 JVM_END
444
445
446 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
447 before_exit(thread, true);
448 vm_exit(code);
449 JVM_END
450
451
452 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
453 if (!DisableExplicitGC) {
454 EventSystemGC event;
455 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
456 Universe::heap()->collect(GCCause::_java_lang_system_gc);
457 event.commit();
458 }
459 JVM_END
460
461
462 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
463 return Universe::heap()->millis_since_last_whole_heap_examined();
464 JVM_END
465
466
467 static inline jlong convert_size_t_to_jlong(size_t val) {
468 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
469 NOT_LP64 (return (jlong)val;)
470 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
471 }
472
473 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
474 size_t n = Universe::heap()->capacity();
475 return convert_size_t_to_jlong(n);
476 JVM_END
477
478
479 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
480 size_t n = Universe::heap()->unused();
481 return convert_size_t_to_jlong(n);
482 JVM_END
483
484
485 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
486 size_t n = Universe::heap()->max_capacity();
487 return convert_size_t_to_jlong(n);
488 JVM_END
489
490
491 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
492 return os::active_processor_count();
493 JVM_END
494
495 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
496 #ifdef LINUX
497 if (UseContainerSupport) {
498 return JNI_TRUE;
499 }
500 #endif
501 return JNI_FALSE;
502 JVM_END
503
504 JVM_LEAF(jboolean, JVM_IsContainerized(void))
505 #ifdef LINUX
506 if (OSContainer::is_containerized()) {
507 return JNI_TRUE;
508 }
509 #endif
510 return JNI_FALSE;
511 JVM_END
512
513 // java.lang.Throwable //////////////////////////////////////////////////////
514
515 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
516 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
517 java_lang_Throwable::fill_in_stack_trace(exception);
518 JVM_END
519
520 // java.lang.NullPointerException ///////////////////////////////////////////
521
522 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
523 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
524
525 oop exc = JNIHandles::resolve_non_null(throwable);
526
527 Method* method;
528 int bci;
529 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
530 return nullptr;
531 }
532 if (method->is_native()) {
533 return nullptr;
534 }
535
536 stringStream ss;
537 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
538 if (ok) {
539 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
540 return (jstring) JNIHandles::make_local(THREAD, result);
541 } else {
542 return nullptr;
543 }
544 JVM_END
545
546 // java.lang.StackTraceElement //////////////////////////////////////////////
547
548
549 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
550 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
551 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
552 objArrayHandle stack_trace(THREAD, st);
553 // Fill in the allocated stack trace
554 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
555 JVM_END
556
557
558 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
559 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
560 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
561 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
562 JVM_END
563
564
565 // java.lang.StackWalker //////////////////////////////////////////////////////
566 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
567 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
568
569 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
570 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
571 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
572 if (!have_name) {
573 oop name = StringTable::intern(method->name(), CHECK);
574 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
575 }
576 if (!have_type) {
577 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
578 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
579 }
580 JVM_END
581
582 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
583 jint skip_frames, jobject contScope, jobject cont,
584 jint buffer_size, jint start_index, jobjectArray frames))
585 if (!thread->has_last_Java_frame()) {
586 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
587 }
588
589 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
590 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
591 Handle cont_h(THREAD, JNIHandles::resolve(cont));
592 // frames array is a ClassFrameInfo[] array when only getting caller reference,
593 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
594 // be null.
595 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
596 objArrayHandle frames_array_h(THREAD, fa);
597
598 if (frames_array_h->length() < buffer_size) {
599 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
600 }
601
602 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
603 buffer_size, start_index, frames_array_h, CHECK_NULL);
604 return JNIHandles::make_local(THREAD, result);
605 JVM_END
606
607
608 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
609 jint last_batch_count, jint buffer_size, jint start_index,
610 jobjectArray frames))
611 // frames array is a ClassFrameInfo[] array when only getting caller reference,
612 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
613 // be null.
614 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
615 objArrayHandle frames_array_h(THREAD, fa);
616
617 if (frames_array_h->length() < buffer_size) {
618 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
619 }
620
621 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
622 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
623 start_index, frames_array_h, THREAD);
624 JVM_END
625
626 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
627 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
628 objArrayHandle frames_array_h(THREAD, fa);
629 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
630 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
631
632 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
633 JVM_END
634
635 // java.lang.Object ///////////////////////////////////////////////
636
637
638 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
639 // as implemented in the classic virtual machine; return 0 if object is null
640 return handle == nullptr ? 0 :
641 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
642 JVM_END
643
644
645 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
646 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
647 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
648 if (JvmtiExport::should_post_monitor_wait()) {
649 JvmtiExport::post_monitor_wait(thread, obj(), ms);
650
651 // The current thread already owns the monitor and it has not yet
652 // been added to the wait queue so the current thread cannot be
653 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
654 // event handler cannot accidentally consume an unpark() meant for
655 // the ParkEvent associated with this ObjectMonitor.
656 }
657 ObjectSynchronizer::wait(obj, ms, CHECK);
658 JVM_END
659
660
661 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
662 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
663 ObjectSynchronizer::notify(obj, CHECK);
664 JVM_END
665
666
667 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
668 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
669 ObjectSynchronizer::notifyall(obj, CHECK);
670 JVM_END
671
672
673 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
674 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
675 Klass* klass = obj->klass();
676 JvmtiVMObjectAllocEventCollector oam;
677
678 #ifdef ASSERT
679 // Just checking that the cloneable flag is set correct
680 if (obj->is_array()) {
681 guarantee(klass->is_cloneable(), "all arrays are cloneable");
682 } else {
683 guarantee(obj->is_instance(), "should be instanceOop");
684 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
685 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
686 }
687 #endif
688
689 // Check if class of obj supports the Cloneable interface.
690 // All arrays are considered to be cloneable (See JLS 20.1.5).
691 // All j.l.r.Reference classes are considered non-cloneable.
692 if (!klass->is_cloneable() ||
693 (klass->is_instance_klass() &&
694 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
695 ResourceMark rm(THREAD);
696 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
697 }
698
699 // Make shallow object copy
700 const size_t size = obj->size();
701 oop new_obj_oop = nullptr;
702 if (obj->is_array()) {
703 const int length = ((arrayOop)obj())->length();
704 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
705 /* do_zero */ true, CHECK_NULL);
706 } else {
707 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
708 }
709
710 HeapAccess<>::clone(obj(), new_obj_oop, size);
711
712 Handle new_obj(THREAD, new_obj_oop);
713 // Caution: this involves a java upcall, so the clone should be
714 // "gc-robust" by this stage.
715 if (klass->has_finalizer()) {
716 assert(obj->is_instance(), "should be instanceOop");
717 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
718 new_obj = Handle(THREAD, new_obj_oop);
719 }
720
721 return JNIHandles::make_local(THREAD, new_obj());
722 JVM_END
723
724 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
725
726 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
727 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
728 JVM_END
729
730 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
731 return InstanceKlass::is_finalization_enabled();
732 JVM_END
733
734 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
735
736 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
737 CONT_RegisterNativeMethods(env, cls);
738 JVM_END
739
740 // java.io.File ///////////////////////////////////////////////////////////////
741
742 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
743 return os::native_path(path);
744 JVM_END
745
746
747 // Misc. class handling ///////////////////////////////////////////////////////////
748
749
750 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
751 // Getting the class of the caller frame.
752 //
753 // The call stack at this point looks something like this:
754 //
755 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
756 // [1] [ @CallerSensitive API.method ]
757 // [.] [ (skipped intermediate frames) ]
758 // [n] [ caller ]
759 vframeStream vfst(thread);
760 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
761 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
762 Method* m = vfst.method();
763 assert(m != nullptr, "sanity");
764 switch (n) {
765 case 0:
766 // This must only be called from Reflection.getCallerClass
767 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
768 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
769 }
770 // fall-through
771 case 1:
772 // Frame 0 and 1 must be caller sensitive.
773 if (!m->caller_sensitive()) {
774 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
775 }
776 break;
777 default:
778 if (!m->is_ignored_by_security_stack_walk()) {
779 // We have reached the desired frame; return the holder class.
780 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
781 }
782 break;
783 }
784 }
785 return nullptr;
786 JVM_END
787
788
789 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
790 oop mirror = nullptr;
791 BasicType t = name2type(utf);
792 if (t != T_ILLEGAL && !is_reference_type(t)) {
793 mirror = Universe::java_mirror(t);
794 }
795 if (mirror == nullptr) {
796 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
797 } else {
798 return (jclass) JNIHandles::make_local(THREAD, mirror);
799 }
800 JVM_END
801
802
803 // Returns a class loaded by the bootstrap class loader; or null
804 // if not found. ClassNotFoundException is not thrown.
805 // FindClassFromBootLoader is exported to the launcher for windows.
806 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
807 // Java libraries should ensure that name is never null or illegal.
808 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
809 // It's impossible to create this class; the name cannot fit
810 // into the constant pool.
811 return nullptr;
812 }
813 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
814
815 TempNewSymbol h_name = SymbolTable::new_symbol(name);
816 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
817 if (k == nullptr) {
818 return nullptr;
819 }
820
821 if (log_is_enabled(Debug, class, resolve)) {
822 trace_class_resolution(k);
823 }
824 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
825 JVM_END
826
827 // Find a class with this name in this loader, using the caller's protection domain.
828 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
829 jboolean init, jobject loader,
830 jclass caller))
831 TempNewSymbol h_name =
832 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
833 CHECK_NULL);
834
835 oop loader_oop = JNIHandles::resolve(loader);
836 oop from_class = JNIHandles::resolve(caller);
837 Handle h_loader(THREAD, loader_oop);
838
839 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
840 false, THREAD);
841
842 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
843 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
844 }
845 return result;
846 JVM_END
847
848 // Currently only called from the old verifier.
849 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
850 jboolean init, jclass from))
851 TempNewSymbol h_name =
852 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
853 CHECK_NULL);
854 oop from_class_oop = JNIHandles::resolve(from);
855 Klass* from_class = (from_class_oop == nullptr)
856 ? (Klass*)nullptr
857 : java_lang_Class::as_Klass(from_class_oop);
858 oop class_loader = nullptr;
859 if (from_class != nullptr) {
860 class_loader = from_class->class_loader();
861 }
862 Handle h_loader(THREAD, class_loader);
863 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
864
865 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
866 // this function is generally only used for class loading during verification.
867 ResourceMark rm;
868 oop from_mirror = JNIHandles::resolve_non_null(from);
869 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
870 const char * from_name = from_class->external_name();
871
872 oop mirror = JNIHandles::resolve_non_null(result);
873 Klass* to_class = java_lang_Class::as_Klass(mirror);
874 const char * to = to_class->external_name();
875 log_debug(class, resolve)("%s %s (verification)", from_name, to);
876 }
877
878 return result;
879 JVM_END
880
881 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
882 static jclass jvm_define_class_common(const char *name,
883 jobject loader, const jbyte *buf,
884 jsize len, jobject pd, const char *source,
885 TRAPS) {
886 if (source == nullptr) source = "__JVM_DefineClass__";
887
888 JavaThread* jt = THREAD;
889
890 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
891 ClassLoader::perf_define_appclass_selftime(),
892 ClassLoader::perf_define_appclasses(),
893 jt->get_thread_stat()->perf_recursion_counts_addr(),
894 jt->get_thread_stat()->perf_timers_addr(),
895 PerfClassTraceTime::DEFINE_CLASS);
896
897 if (UsePerfData) {
898 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
899 }
900
901 // Class resolution will get the class name from the .class stream if the name is null.
902 TempNewSymbol class_name = name == nullptr ? nullptr :
903 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
904 CHECK_NULL);
905
906 ResourceMark rm(THREAD);
907 ClassFileStream st((u1*)buf, len, source);
908 Handle class_loader (THREAD, JNIHandles::resolve(loader));
909 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
910 ClassLoadInfo cl_info(protection_domain);
911 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
912 class_loader,
913 cl_info,
914 CHECK_NULL);
915
916 if (log_is_enabled(Debug, class, resolve)) {
917 trace_class_resolution(k);
918 }
919
920 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
921 }
922
923 enum {
924 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
925 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
926 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
927 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
928 };
929
930 /*
931 * Define a class with the specified flags that indicates if it's a nestmate,
932 * hidden, or strongly referenced from class loader.
933 */
934 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
935 const jbyte *buf, jsize len, jobject pd,
936 jboolean init, int flags, jobject classData, TRAPS) {
937 ResourceMark rm(THREAD);
938
939 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup));
940 // Lookup class must be a non-null instance
941 if (lookup_k == nullptr) {
942 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
943 }
944 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass");
945
946 Handle class_loader (THREAD, lookup_k->class_loader());
947
948 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
949 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
950 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
951 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
952
953 InstanceKlass* host_class = nullptr;
954 if (is_nestmate) {
955 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL);
956 }
957
958 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
959 name,
960 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
961 is_nestmate ? host_class->external_name() : "",
962 is_hidden ? "hidden" : "not hidden",
963 is_strong ? "strong" : "weak",
964 vm_annotations ? "with vm annotations" : "without vm annotation");
965
966 if (!is_hidden) {
967 // classData is only applicable for hidden classes
968 if (classData != nullptr) {
969 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
970 }
971 if (is_nestmate) {
972 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
973 }
974 if (!is_strong) {
975 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
976 }
977 if (vm_annotations) {
978 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
979 }
980 if (flags != STRONG_LOADER_LINK) {
981 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
982 err_msg("invalid flag 0x%x", flags));
983 }
984 }
985
986 // Class resolution will get the class name from the .class stream if the name is null.
987 TempNewSymbol class_name = name == nullptr ? nullptr :
988 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
989 CHECK_NULL);
990
991 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
992 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
993 ClassFileStream st((u1*)buf, len, source);
994
995 InstanceKlass* ik = nullptr;
996 if (!is_hidden) {
997 ClassLoadInfo cl_info(protection_domain);
998 ik = SystemDictionary::resolve_from_stream(&st, class_name,
999 class_loader,
1000 cl_info,
1001 CHECK_NULL);
1002
1003 if (log_is_enabled(Debug, class, resolve)) {
1004 trace_class_resolution(ik);
1005 }
1006 } else { // hidden
1007 Handle classData_h(THREAD, JNIHandles::resolve(classData));
1008 ClassLoadInfo cl_info(protection_domain,
1009 host_class,
1010 classData_h,
1011 is_hidden,
1012 is_strong,
1013 vm_annotations);
1014 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1015 class_loader,
1016 cl_info,
1017 CHECK_NULL);
1018
1019 // The hidden class loader data has been artificially been kept alive to
1020 // this point. The mirror and any instances of this class have to keep
1021 // it alive afterwards.
1022 ik->class_loader_data()->dec_keep_alive_ref_count();
1023
1024 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1025 ModuleEntry* module = ik->module();
1026 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1027 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1028 module_name,
1029 ik->external_name(),
1030 host_class->external_name(),
1031 ik->is_hidden() ? "is hidden" : "is not hidden");
1032 }
1033 }
1034
1035 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1036 // non-hidden class or nestmate class must be in the same package as the Lookup class
1037 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1038 }
1039
1040 if (init) {
1041 ik->initialize(CHECK_NULL);
1042 } else {
1043 ik->link_class(CHECK_NULL);
1044 }
1045
1046 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1047 }
1048
1049 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1050 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1051 JVM_END
1052
1053 /*
1054 * Define a class with the specified lookup class.
1055 * lookup: Lookup class
1056 * name: the name of the class
1057 * buf: class bytes
1058 * len: length of class bytes
1059 * pd: protection domain
1060 * init: initialize the class
1061 * flags: properties of the class
1062 * classData: private static pre-initialized field
1063 */
1064 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1065 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1066
1067 if (lookup == nullptr) {
1068 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1069 }
1070
1071 assert(buf != nullptr, "buf must not be null");
1072
1073 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1074 JVM_END
1075
1076 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))
1077 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1078 JVM_END
1079
1080 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1081 ResourceMark rm(THREAD);
1082
1083 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1084 char* str = java_lang_String::as_utf8_string(h_name());
1085
1086 // Sanity check, don't expect null
1087 if (str == nullptr) return nullptr;
1088
1089 // Internalize the string, converting '.' to '/' in string.
1090 char* p = (char*)str;
1091 while (*p != '\0') {
1092 if (*p == '.') {
1093 *p = '/';
1094 }
1095 p++;
1096 }
1097
1098 const int str_len = (int)(p - str);
1099 if (str_len > Symbol::max_length()) {
1100 // It's impossible to create this class; the name cannot fit
1101 // into the constant pool.
1102 return nullptr;
1103 }
1104 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1105
1106 // Security Note:
1107 // The Java level wrapper will perform the necessary security check allowing
1108 // us to pass the null as the initiating class loader.
1109 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1110 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1111 #if INCLUDE_CDS
1112 if (k == nullptr) {
1113 // If the class is not already loaded, try to see if it's in the shared
1114 // archive for the current classloader (h_loader).
1115 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1116 }
1117 #endif
1118 return (k == nullptr) ? nullptr :
1119 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1120 JVM_END
1121
1122 // Module support //////////////////////////////////////////////////////////////////////////////
1123
1124 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1125 jstring location, jobjectArray packages))
1126 Handle h_module (THREAD, JNIHandles::resolve(module));
1127 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1128 JVM_END
1129
1130 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1131 Handle h_module (THREAD, JNIHandles::resolve(module));
1132 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1133 JVM_END
1134
1135 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1136 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1137 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1138 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1139 JVM_END
1140
1141 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1142 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1143 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1144 JVM_END
1145
1146 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1147 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1148 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1149 JVM_END
1150
1151 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1152 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1153 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1154 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1155 JVM_END
1156
1157 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1158 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1159 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1160 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1161 JVM_END
1162
1163 // Reflection support //////////////////////////////////////////////////////////////////////////////
1164
1165 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1166 assert (cls != nullptr, "illegal class");
1167 JvmtiVMObjectAllocEventCollector oam;
1168 ResourceMark rm(THREAD);
1169 HandleMark hm(THREAD);
1170 Handle java_class(THREAD, JNIHandles::resolve(cls));
1171 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1172 return (jstring) JNIHandles::make_local(THREAD, result);
1173 JVM_END
1174
1175
1176 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1177 JvmtiVMObjectAllocEventCollector oam;
1178 oop mirror = JNIHandles::resolve_non_null(cls);
1179
1180 // Special handling for primitive objects
1181 if (java_lang_Class::is_primitive(mirror)) {
1182 // Primitive objects does not have any interfaces
1183 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1184 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1185 }
1186
1187 Klass* klass = java_lang_Class::as_Klass(mirror);
1188 // Figure size of result array
1189 int size;
1190 if (klass->is_instance_klass()) {
1191 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1192 } else {
1193 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1194 size = 2;
1195 }
1196
1197 // Allocate result array
1198 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1199 objArrayHandle result (THREAD, r);
1200 // Fill in result
1201 if (klass->is_instance_klass()) {
1202 // Regular instance klass, fill in all local interfaces
1203 for (int index = 0; index < size; index++) {
1204 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1205 result->obj_at_put(index, k->java_mirror());
1206 }
1207 } else {
1208 // All arrays implement java.lang.Cloneable and java.io.Serializable
1209 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1210 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1211 }
1212 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1213 JVM_END
1214
1215
1216 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
1217 oop mirror = JNIHandles::resolve_non_null(cls);
1218 if (java_lang_Class::is_primitive(mirror)) {
1219 return JNI_FALSE;
1220 }
1221 Klass* k = java_lang_Class::as_Klass(mirror);
1222 jboolean result = k->is_interface();
1223 assert(!result || k->is_instance_klass(),
1224 "all interfaces are instance types");
1225 // The compiler intrinsic for isInterface tests the
1226 // Klass::_access_flags bits in the same way.
1227 return result;
1228 JVM_END
1229
1230 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1231 oop mirror = JNIHandles::resolve_non_null(cls);
1232 if (java_lang_Class::is_primitive(mirror)) {
1233 return JNI_FALSE;
1234 }
1235 Klass* k = java_lang_Class::as_Klass(mirror);
1236 return k->is_hidden();
1237 JVM_END
1238
1239 JVM_ENTRY_PROF(jobject, JVM_GetProtectionDomain, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1240 oop mirror = JNIHandles::resolve_non_null(cls);
1241 if (mirror == nullptr) {
1242 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
1243 }
1244
1245 if (java_lang_Class::is_primitive(mirror)) {
1246 // Primitive types does not have a protection domain.
1247 return nullptr;
1248 }
1249
1250 oop pd = java_lang_Class::protection_domain(mirror);
1251 return (jobject) JNIHandles::make_local(THREAD, pd);
1252 JVM_END
1253
1254 class ScopedValueBindingsResolver {
1255 public:
1256 InstanceKlass* Carrier_klass;
1257 ScopedValueBindingsResolver(JavaThread* THREAD) {
1258 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1259 Carrier_klass = InstanceKlass::cast(k);
1260 }
1261 };
1262
1263 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1264 ResourceMark rm(THREAD);
1265 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1266 JvmtiVMObjectAllocEventCollector oam;
1267
1268 static ScopedValueBindingsResolver resolver(THREAD);
1269
1270 // Iterate through Java frames
1271 vframeStream vfst(thread);
1272 for(; !vfst.at_end(); vfst.next()) {
1273 int loc = -1;
1274 // get method of frame
1275 Method* method = vfst.method();
1276
1277 Symbol *name = method->name();
1278
1279 InstanceKlass* holder = method->method_holder();
1280 if (name == vmSymbols::runWith_method_name()) {
1281 if (holder == vmClasses::Thread_klass()
1282 || holder == resolver.Carrier_klass) {
1283 loc = 1;
1284 }
1285 }
1286
1287 if (loc != -1) {
1288 javaVFrame *frame = vfst.asJavaVFrame();
1289 StackValueCollection* locals = frame->locals();
1290 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1291 Handle result = head_sv->get_obj();
1292 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1293 if (result() != nullptr) {
1294 return JNIHandles::make_local(THREAD, result());
1295 }
1296 }
1297 }
1298
1299 return nullptr;
1300 JVM_END
1301
1302 JVM_ENTRY_PROF(jboolean, JVM_IsArrayClass, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1303 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1304 return (k != nullptr) && k->is_array_klass() ? true : false;
1305 JVM_END
1306
1307
1308 JVM_ENTRY_PROF(jboolean, JVM_IsPrimitiveClass, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1309 oop mirror = JNIHandles::resolve_non_null(cls);
1310 return (jboolean) java_lang_Class::is_primitive(mirror);
1311 JVM_END
1312
1313
1314 JVM_ENTRY_PROF(jint, JVM_GetClassModifiers, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1315 oop mirror = JNIHandles::resolve_non_null(cls);
1316 if (java_lang_Class::is_primitive(mirror)) {
1317 // Primitive type
1318 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1319 }
1320
1321 Klass* k = java_lang_Class::as_Klass(mirror);
1322 debug_only(u2 computed_modifiers = k->compute_modifier_flags());
1323 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1324 return k->modifier_flags();
1325 JVM_END
1326
1327
1328 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1329
1330 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1331 JvmtiVMObjectAllocEventCollector oam;
1332 // ofClass is a reference to a java_lang_Class object. The mirror object
1333 // of an InstanceKlass
1334 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1335 if (java_lang_Class::is_primitive(ofMirror) ||
1336 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1337 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1338 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1339 }
1340
1341 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1342 InnerClassesIterator iter(k);
1343
1344 if (iter.length() == 0) {
1345 // Neither an inner nor outer class
1346 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1347 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1348 }
1349
1350 // find inner class info
1351 constantPoolHandle cp(thread, k->constants());
1352 int length = iter.length();
1353
1354 // Allocate temp. result array
1355 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1356 objArrayHandle result (THREAD, r);
1357 int members = 0;
1358
1359 for (; !iter.done(); iter.next()) {
1360 int ioff = iter.inner_class_info_index();
1361 int ooff = iter.outer_class_info_index();
1362
1363 if (ioff != 0 && ooff != 0) {
1364 // Check to see if the name matches the class we're looking for
1365 // before attempting to find the class.
1366 if (cp->klass_name_at_matches(k, ooff)) {
1367 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1368 if (outer_klass == k) {
1369 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1370 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1371
1372 // Throws an exception if outer klass has not declared k as
1373 // an inner klass
1374 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1375
1376 result->obj_at_put(members, inner_klass->java_mirror());
1377 members++;
1378 }
1379 }
1380 }
1381 }
1382
1383 if (members != length) {
1384 // Return array of right length
1385 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1386 for(int i = 0; i < members; i++) {
1387 res->obj_at_put(i, result->obj_at(i));
1388 }
1389 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1390 }
1391
1392 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1393 JVM_END
1394
1395
1396 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1397 {
1398 // ofClass is a reference to a java_lang_Class object.
1399 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1400 if (java_lang_Class::is_primitive(ofMirror)) {
1401 return nullptr;
1402 }
1403 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1404 if (!klass->is_instance_klass()) {
1405 return nullptr;
1406 }
1407
1408 bool inner_is_member = false;
1409 Klass* outer_klass
1410 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1411 if (outer_klass == nullptr) return nullptr; // already a top-level class
1412 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1413 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1414 }
1415 JVM_END
1416
1417 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1418 {
1419 oop mirror = JNIHandles::resolve_non_null(cls);
1420 if (java_lang_Class::is_primitive(mirror)) {
1421 return nullptr;
1422 }
1423 Klass* klass = java_lang_Class::as_Klass(mirror);
1424 if (!klass->is_instance_klass()) {
1425 return nullptr;
1426 }
1427 InstanceKlass* k = InstanceKlass::cast(klass);
1428 int ooff = 0, noff = 0;
1429 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1430 if (noff != 0) {
1431 constantPoolHandle i_cp(thread, k->constants());
1432 Symbol* name = i_cp->symbol_at(noff);
1433 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1434 return (jstring) JNIHandles::make_local(THREAD, str());
1435 }
1436 }
1437 return nullptr;
1438 }
1439 JVM_END
1440
1441 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1442 assert (cls != nullptr, "illegal class");
1443 JvmtiVMObjectAllocEventCollector oam;
1444 ResourceMark rm(THREAD);
1445 oop mirror = JNIHandles::resolve_non_null(cls);
1446 // Return null for arrays and primitives
1447 if (!java_lang_Class::is_primitive(mirror)) {
1448 Klass* k = java_lang_Class::as_Klass(mirror);
1449 if (k->is_instance_klass()) {
1450 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1451 if (sym == nullptr) return nullptr;
1452 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1453 return (jstring) JNIHandles::make_local(THREAD, str());
1454 }
1455 }
1456 return nullptr;
1457 JVM_END
1458
1459
1460 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1461 assert (cls != nullptr, "illegal class");
1462 oop mirror = JNIHandles::resolve_non_null(cls);
1463 // Return null for arrays and primitives
1464 if (!java_lang_Class::is_primitive(mirror)) {
1465 Klass* k = java_lang_Class::as_Klass(mirror);
1466 if (k->is_instance_klass()) {
1467 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1468 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1469 }
1470 }
1471 return nullptr;
1472 JVM_END
1473
1474
1475 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1476 // some of this code was adapted from from jni_FromReflectedField
1477
1478 oop reflected = JNIHandles::resolve_non_null(field);
1479 oop mirror = java_lang_reflect_Field::clazz(reflected);
1480 Klass* k = java_lang_Class::as_Klass(mirror);
1481 int slot = java_lang_reflect_Field::slot(reflected);
1482 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1483
1484 InstanceKlass* ik = InstanceKlass::cast(k);
1485 int offset = ik->field_offset(slot);
1486
1487 if (modifiers & JVM_ACC_STATIC) {
1488 // for static fields we only look in the current class
1489 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1490 assert(false, "cannot find static field");
1491 return false;
1492 }
1493 } else {
1494 // for instance fields we start with the current class and work
1495 // our way up through the superclass chain
1496 if (!ik->find_field_from_offset(offset, false, &fd)) {
1497 assert(false, "cannot find instance field");
1498 return false;
1499 }
1500 }
1501 return true;
1502 }
1503
1504 static Method* jvm_get_method_common(jobject method) {
1505 // some of this code was adapted from from jni_FromReflectedMethod
1506
1507 oop reflected = JNIHandles::resolve_non_null(method);
1508 oop mirror = nullptr;
1509 int slot = 0;
1510
1511 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1512 mirror = java_lang_reflect_Constructor::clazz(reflected);
1513 slot = java_lang_reflect_Constructor::slot(reflected);
1514 } else {
1515 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1516 "wrong type");
1517 mirror = java_lang_reflect_Method::clazz(reflected);
1518 slot = java_lang_reflect_Method::slot(reflected);
1519 }
1520 Klass* k = java_lang_Class::as_Klass(mirror);
1521
1522 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1523 assert(m != nullptr, "cannot find method");
1524 return m; // caller has to deal with null in product mode
1525 }
1526
1527 /* Type use annotations support (JDK 1.8) */
1528
1529 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1530 assert (cls != nullptr, "illegal class");
1531 ResourceMark rm(THREAD);
1532 // Return null for arrays and primitives
1533 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1535 if (k->is_instance_klass()) {
1536 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1537 if (type_annotations != nullptr) {
1538 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1539 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1540 }
1541 }
1542 }
1543 return nullptr;
1544 JVM_END
1545
1546 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1547 assert (method != nullptr, "illegal method");
1548 // method is a handle to a java.lang.reflect.Method object
1549 Method* m = jvm_get_method_common(method);
1550 if (m == nullptr) {
1551 return nullptr;
1552 }
1553
1554 AnnotationArray* type_annotations = m->type_annotations();
1555 if (type_annotations != nullptr) {
1556 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1557 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1558 }
1559
1560 return nullptr;
1561 JVM_END
1562
1563 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1564 assert (field != nullptr, "illegal field");
1565 fieldDescriptor fd;
1566 bool gotFd = jvm_get_field_common(field, fd);
1567 if (!gotFd) {
1568 return nullptr;
1569 }
1570
1571 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1572 JVM_END
1573
1574 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1575 if (!cp->is_within_bounds(index)) {
1576 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1577 }
1578 }
1579
1580 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1581 {
1582 // method is a handle to a java.lang.reflect.Method object
1583 Method* method_ptr = jvm_get_method_common(method);
1584 methodHandle mh (THREAD, method_ptr);
1585 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1586 const int num_params = mh->method_parameters_length();
1587
1588 if (num_params < 0) {
1589 // A -1 return value from method_parameters_length means there is no
1590 // parameter data. Return null to indicate this to the reflection
1591 // API.
1592 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1593 return (jobjectArray)nullptr;
1594 } else {
1595 // Otherwise, we return something up to reflection, even if it is
1596 // a zero-length array. Why? Because in some cases this can
1597 // trigger a MalformedParametersException.
1598
1599 // make sure all the symbols are properly formatted
1600 for (int i = 0; i < num_params; i++) {
1601 MethodParametersElement* params = mh->method_parameters_start();
1602 int index = params[i].name_cp_index;
1603 constantPoolHandle cp(THREAD, mh->constants());
1604 bounds_check(cp, index, CHECK_NULL);
1605
1606 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1607 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1608 "Wrong type at constant pool index");
1609 }
1610
1611 }
1612
1613 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1614 objArrayHandle result (THREAD, result_oop);
1615
1616 for (int i = 0; i < num_params; i++) {
1617 MethodParametersElement* params = mh->method_parameters_start();
1618 // For a 0 index, give a null symbol
1619 Symbol* sym = 0 != params[i].name_cp_index ?
1620 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1621 int flags = params[i].flags;
1622 oop param = Reflection::new_parameter(reflected_method, i, sym,
1623 flags, CHECK_NULL);
1624 result->obj_at_put(i, param);
1625 }
1626 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1627 }
1628 }
1629 JVM_END
1630
1631 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1632
1633 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1634 {
1635 JvmtiVMObjectAllocEventCollector oam;
1636
1637 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1638 // Exclude primitive types and array types
1639 if (java_lang_Class::is_primitive(ofMirror) ||
1640 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1641 // Return empty array
1642 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1643 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1644 }
1645
1646 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1647 constantPoolHandle cp(THREAD, k->constants());
1648
1649 // Ensure class is linked
1650 k->link_class(CHECK_NULL);
1651
1652 // Allocate result
1653 int num_fields;
1654
1655 if (publicOnly) {
1656 num_fields = 0;
1657 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1658 if (fs.access_flags().is_public()) ++num_fields;
1659 }
1660 } else {
1661 num_fields = k->java_fields_count();
1662 }
1663
1664 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1665 objArrayHandle result (THREAD, r);
1666
1667 int out_idx = 0;
1668 fieldDescriptor fd;
1669 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1670 if (!publicOnly || fs.access_flags().is_public()) {
1671 fd.reinitialize(k, fs.index());
1672 oop field = Reflection::new_field(&fd, CHECK_NULL);
1673 result->obj_at_put(out_idx, field);
1674 ++out_idx;
1675 }
1676 }
1677 assert(out_idx == num_fields, "just checking");
1678 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1679 }
1680 JVM_END
1681
1682 // A class is a record if and only if it is final and a direct subclass of
1683 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1684 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1685 {
1686 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1687 if (k != nullptr && k->is_instance_klass()) {
1688 InstanceKlass* ik = InstanceKlass::cast(k);
1689 return ik->is_record();
1690 } else {
1691 return false;
1692 }
1693 }
1694 JVM_END
1695
1696 // Returns an array containing the components of the Record attribute,
1697 // or null if the attribute is not present.
1698 //
1699 // Note that this function returns the components of the Record attribute
1700 // even if the class is not a record.
1701 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1702 {
1703 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1704 assert(c->is_instance_klass(), "must be");
1705 InstanceKlass* ik = InstanceKlass::cast(c);
1706
1707 Array<RecordComponent*>* components = ik->record_components();
1708 if (components != nullptr) {
1709 JvmtiVMObjectAllocEventCollector oam;
1710 constantPoolHandle cp(THREAD, ik->constants());
1711 int length = components->length();
1712 assert(length >= 0, "unexpected record_components length");
1713 objArrayOop record_components =
1714 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1715 objArrayHandle components_h (THREAD, record_components);
1716
1717 for (int x = 0; x < length; x++) {
1718 RecordComponent* component = components->at(x);
1719 assert(component != nullptr, "unexpected null record component");
1720 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1721 components_h->obj_at_put(x, component_oop);
1722 }
1723 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1724 }
1725
1726 return nullptr;
1727 }
1728 JVM_END
1729
1730 static jobjectArray get_class_declared_methods_helper(
1731 JNIEnv *env,
1732 jclass ofClass, jboolean publicOnly,
1733 bool want_constructor,
1734 Klass* klass, TRAPS) {
1735
1736 JvmtiVMObjectAllocEventCollector oam;
1737
1738 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1739 // Exclude primitive types and array types
1740 if (java_lang_Class::is_primitive(ofMirror)
1741 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1742 // Return empty array
1743 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1744 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1745 }
1746
1747 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1748
1749 // Ensure class is linked
1750 k->link_class(CHECK_NULL);
1751
1752 Array<Method*>* methods = k->methods();
1753 int methods_length = methods->length();
1754
1755 // Save original method_idnum in case of redefinition, which can change
1756 // the idnum of obsolete methods. The new method will have the same idnum
1757 // but if we refresh the methods array, the counts will be wrong.
1758 ResourceMark rm(THREAD);
1759 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1760 int num_methods = 0;
1761
1762 // Select methods matching the criteria.
1763 for (int i = 0; i < methods_length; i++) {
1764 Method* method = methods->at(i);
1765 if (want_constructor && !method->is_object_initializer()) {
1766 continue;
1767 }
1768 if (!want_constructor &&
1769 (method->is_object_initializer() || method->is_static_initializer() ||
1770 method->is_overpass())) {
1771 continue;
1772 }
1773 if (publicOnly && !method->is_public()) {
1774 continue;
1775 }
1776 idnums->push(method->method_idnum());
1777 ++num_methods;
1778 }
1779
1780 // Allocate result
1781 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1782 objArrayHandle result (THREAD, r);
1783
1784 // Now just put the methods that we selected above, but go by their idnum
1785 // in case of redefinition. The methods can be redefined at any safepoint,
1786 // so above when allocating the oop array and below when creating reflect
1787 // objects.
1788 for (int i = 0; i < num_methods; i++) {
1789 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1790 if (method.is_null()) {
1791 // Method may have been deleted and seems this API can handle null
1792 // Otherwise should probably put a method that throws NSME
1793 result->obj_at_put(i, nullptr);
1794 } else {
1795 oop m;
1796 if (want_constructor) {
1797 m = Reflection::new_constructor(method, CHECK_NULL);
1798 } else {
1799 m = Reflection::new_method(method, false, CHECK_NULL);
1800 }
1801 result->obj_at_put(i, m);
1802 }
1803 }
1804
1805 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1806 }
1807
1808 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1809 {
1810 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1811 /*want_constructor*/ false,
1812 vmClasses::reflect_Method_klass(), THREAD);
1813 }
1814 JVM_END
1815
1816 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1817 {
1818 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1819 /*want_constructor*/ true,
1820 vmClasses::reflect_Constructor_klass(), THREAD);
1821 }
1822 JVM_END
1823
1824 JVM_ENTRY_PROF(jint, JVM_GetClassAccessFlags, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1825 {
1826 oop mirror = JNIHandles::resolve_non_null(cls);
1827 if (java_lang_Class::is_primitive(mirror)) {
1828 // Primitive type
1829 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1830 }
1831
1832 Klass* k = java_lang_Class::as_Klass(mirror);
1833 return k->access_flags().as_class_flags();
1834 }
1835 JVM_END
1836
1837 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1838 {
1839 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1840 assert(c->is_instance_klass(), "must be");
1841 InstanceKlass* ck = InstanceKlass::cast(c);
1842 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1843 assert(m->is_instance_klass(), "must be");
1844 InstanceKlass* mk = InstanceKlass::cast(m);
1845 return ck->has_nestmate_access_to(mk, THREAD);
1846 }
1847 JVM_END
1848
1849 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1850 {
1851 // current is not a primitive or array class
1852 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1853 assert(c->is_instance_klass(), "must be");
1854 InstanceKlass* ck = InstanceKlass::cast(c);
1855 InstanceKlass* host = ck->nest_host(THREAD);
1856 return (jclass) (host == nullptr ? nullptr :
1857 JNIHandles::make_local(THREAD, host->java_mirror()));
1858 }
1859 JVM_END
1860
1861 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1862 {
1863 // current is not a primitive or array class
1864 ResourceMark rm(THREAD);
1865 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1866 assert(c->is_instance_klass(), "must be");
1867 InstanceKlass* ck = InstanceKlass::cast(c);
1868 InstanceKlass* host = ck->nest_host(THREAD);
1869
1870 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1871 ck->external_name(), host->external_name());
1872 {
1873 JvmtiVMObjectAllocEventCollector oam;
1874 Array<u2>* members = host->nest_members();
1875 int length = members == nullptr ? 0 : members->length();
1876
1877 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1878
1879 // nest host is first in the array so make it one bigger
1880 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1881 length + 1, CHECK_NULL);
1882 objArrayHandle result(THREAD, r);
1883 result->obj_at_put(0, host->java_mirror());
1884 if (length != 0) {
1885 int count = 0;
1886 for (int i = 0; i < length; i++) {
1887 int cp_index = members->at(i);
1888 Klass* k = host->constants()->klass_at(cp_index, THREAD);
1889 if (HAS_PENDING_EXCEPTION) {
1890 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1891 return nullptr; // propagate VMEs
1892 }
1893 if (log_is_enabled(Trace, class, nestmates)) {
1894 stringStream ss;
1895 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1896 ss.print(" - resolution of nest member %s failed: ", target_member_class);
1897 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1898 log_trace(class, nestmates)("%s", ss.as_string());
1899 }
1900 CLEAR_PENDING_EXCEPTION;
1901 continue;
1902 }
1903 if (k->is_instance_klass()) {
1904 InstanceKlass* ik = InstanceKlass::cast(k);
1905 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1906 if (nest_host_k == host) {
1907 result->obj_at_put(count+1, k->java_mirror());
1908 count++;
1909 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1910 } else {
1911 log_trace(class, nestmates)(" - skipping member %s with different host %s",
1912 ik->external_name(), nest_host_k->external_name());
1913 }
1914 } else {
1915 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1916 k->external_name());
1917 }
1918 }
1919 if (count < length) {
1920 // we had invalid entries so we need to compact the array
1921 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1922 length + 1, count + 1);
1923
1924 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1925 count + 1, CHECK_NULL);
1926 objArrayHandle result2(THREAD, r2);
1927 for (int i = 0; i < count + 1; i++) {
1928 result2->obj_at_put(i, result->obj_at(i));
1929 }
1930 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1931 }
1932 }
1933 else {
1934 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
1935 }
1936 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1937 }
1938 }
1939 JVM_END
1940
1941 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1942 {
1943 oop mirror = JNIHandles::resolve_non_null(current);
1944 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1945 Klass* c = java_lang_Class::as_Klass(mirror);
1946 assert(c->is_instance_klass(), "must be");
1947 InstanceKlass* ik = InstanceKlass::cast(c);
1948 ResourceMark rm(THREAD);
1949 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1950 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1951 if (ik->is_sealed()) {
1952 JvmtiVMObjectAllocEventCollector oam;
1953 Array<u2>* subclasses = ik->permitted_subclasses();
1954 int length = subclasses->length();
1955
1956 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1957
1958 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1959 length, CHECK_NULL);
1960 objArrayHandle result(THREAD, r);
1961 int count = 0;
1962 for (int i = 0; i < length; i++) {
1963 int cp_index = subclasses->at(i);
1964 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
1965 if (HAS_PENDING_EXCEPTION) {
1966 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1967 return nullptr; // propagate VMEs
1968 }
1969 if (log_is_enabled(Trace, class, sealed)) {
1970 stringStream ss;
1971 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
1972 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
1973 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1974 log_trace(class, sealed)("%s", ss.as_string());
1975 }
1976
1977 CLEAR_PENDING_EXCEPTION;
1978 continue;
1979 }
1980 if (k->is_instance_klass()) {
1981 result->obj_at_put(count++, k->java_mirror());
1982 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
1983 }
1984 }
1985 if (count < length) {
1986 // we had invalid entries so we need to compact the array
1987 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1988 count, CHECK_NULL);
1989 objArrayHandle result2(THREAD, r2);
1990 for (int i = 0; i < count; i++) {
1991 result2->obj_at_put(i, result->obj_at(i));
1992 }
1993 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1994 }
1995 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1996 } else {
1997 return nullptr;
1998 }
1999 }
2000 JVM_END
2001
2002 // Constant pool access //////////////////////////////////////////////////////////
2003
2004 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2005 {
2006 JvmtiVMObjectAllocEventCollector oam;
2007 oop mirror = JNIHandles::resolve_non_null(cls);
2008 // Return null for primitives and arrays
2009 if (!java_lang_Class::is_primitive(mirror)) {
2010 Klass* k = java_lang_Class::as_Klass(mirror);
2011 if (k->is_instance_klass()) {
2012 InstanceKlass* k_h = InstanceKlass::cast(k);
2013 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2014 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2015 return JNIHandles::make_local(THREAD, jcp());
2016 }
2017 }
2018 return nullptr;
2019 }
2020 JVM_END
2021
2022
2023 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2024 {
2025 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2026 return cp->length();
2027 }
2028 JVM_END
2029
2030
2031 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2032 {
2033 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2034 bounds_check(cp, index, CHECK_NULL);
2035 constantTag tag = cp->tag_at(index);
2036 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2037 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2038 }
2039 Klass* k = cp->klass_at(index, CHECK_NULL);
2040 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2041 }
2042 JVM_END
2043
2044 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2045 {
2046 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047 bounds_check(cp, index, CHECK_NULL);
2048 constantTag tag = cp->tag_at(index);
2049 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2050 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2051 }
2052 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2053 if (k == nullptr) return nullptr;
2054 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2055 }
2056 JVM_END
2057
2058 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2059 constantTag tag = cp->tag_at(index);
2060 if (!tag.is_method() && !tag.is_interface_method()) {
2061 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2062 }
2063 int klass_ref = cp->uncached_klass_ref_index_at(index);
2064 Klass* k_o;
2065 if (force_resolution) {
2066 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2067 } else {
2068 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2069 if (k_o == nullptr) return nullptr;
2070 }
2071 InstanceKlass* k = InstanceKlass::cast(k_o);
2072 Symbol* name = cp->uncached_name_ref_at(index);
2073 Symbol* sig = cp->uncached_signature_ref_at(index);
2074 methodHandle m (THREAD, k->find_method(name, sig));
2075 if (m.is_null()) {
2076 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2077 }
2078 oop method;
2079 if (m->is_object_initializer()) {
2080 method = Reflection::new_constructor(m, CHECK_NULL);
2081 } else {
2082 // new_method accepts <clinit> as Method here
2083 method = Reflection::new_method(m, true, CHECK_NULL);
2084 }
2085 return JNIHandles::make_local(THREAD, method);
2086 }
2087
2088 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(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 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2094 return res;
2095 }
2096 JVM_END
2097
2098 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2099 {
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2104 return res;
2105 }
2106 JVM_END
2107
2108 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2109 constantTag tag = cp->tag_at(index);
2110 if (!tag.is_field()) {
2111 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2112 }
2113 int klass_ref = cp->uncached_klass_ref_index_at(index);
2114 Klass* k_o;
2115 if (force_resolution) {
2116 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2117 } else {
2118 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2119 if (k_o == nullptr) return nullptr;
2120 }
2121 InstanceKlass* k = InstanceKlass::cast(k_o);
2122 Symbol* name = cp->uncached_name_ref_at(index);
2123 Symbol* sig = cp->uncached_signature_ref_at(index);
2124 fieldDescriptor fd;
2125 Klass* target_klass = k->find_field(name, sig, &fd);
2126 if (target_klass == nullptr) {
2127 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2128 }
2129 oop field = Reflection::new_field(&fd, CHECK_NULL);
2130 return JNIHandles::make_local(THREAD, field);
2131 }
2132
2133 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2134 {
2135 JvmtiVMObjectAllocEventCollector oam;
2136 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2137 bounds_check(cp, index, CHECK_NULL);
2138 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2139 return res;
2140 }
2141 JVM_END
2142
2143 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2144 {
2145 JvmtiVMObjectAllocEventCollector oam;
2146 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2147 bounds_check(cp, index, CHECK_NULL);
2148 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2149 return res;
2150 }
2151 JVM_END
2152
2153 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2154 {
2155 JvmtiVMObjectAllocEventCollector oam;
2156 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157 bounds_check(cp, index, CHECK_NULL);
2158 constantTag tag = cp->tag_at(index);
2159 if (!tag.is_field_or_method()) {
2160 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2161 }
2162 int klass_ref = cp->uncached_klass_ref_index_at(index);
2163 Symbol* klass_name = cp->klass_name_at(klass_ref);
2164 Symbol* member_name = cp->uncached_name_ref_at(index);
2165 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2166 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2167 objArrayHandle dest(THREAD, dest_o);
2168 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2169 dest->obj_at_put(0, str());
2170 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2171 dest->obj_at_put(1, str());
2172 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2173 dest->obj_at_put(2, str());
2174 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2175 }
2176 JVM_END
2177
2178 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2179 {
2180 JvmtiVMObjectAllocEventCollector oam;
2181 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2182 bounds_check(cp, index, CHECK_0);
2183 constantTag tag = cp->tag_at(index);
2184 if (!tag.is_field_or_method()) {
2185 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2186 }
2187 return (jint) cp->uncached_klass_ref_index_at(index);
2188 }
2189 JVM_END
2190
2191 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2192 {
2193 JvmtiVMObjectAllocEventCollector oam;
2194 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2195 bounds_check(cp, index, CHECK_0);
2196 constantTag tag = cp->tag_at(index);
2197 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2199 }
2200 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2201 }
2202 JVM_END
2203
2204 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2205 {
2206 JvmtiVMObjectAllocEventCollector oam;
2207 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2208 bounds_check(cp, index, CHECK_NULL);
2209 constantTag tag = cp->tag_at(index);
2210 if (!tag.is_name_and_type()) {
2211 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2212 }
2213 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2214 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2215 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2216 objArrayHandle dest(THREAD, dest_o);
2217 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2218 dest->obj_at_put(0, str());
2219 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2220 dest->obj_at_put(1, str());
2221 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2222 }
2223 JVM_END
2224
2225 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2226 {
2227 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2228 bounds_check(cp, index, CHECK_0);
2229 constantTag tag = cp->tag_at(index);
2230 if (!tag.is_int()) {
2231 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2232 }
2233 return cp->int_at(index);
2234 }
2235 JVM_END
2236
2237 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2238 {
2239 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2240 bounds_check(cp, index, CHECK_(0L));
2241 constantTag tag = cp->tag_at(index);
2242 if (!tag.is_long()) {
2243 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2244 }
2245 return cp->long_at(index);
2246 }
2247 JVM_END
2248
2249 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2250 {
2251 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2252 bounds_check(cp, index, CHECK_(0.0f));
2253 constantTag tag = cp->tag_at(index);
2254 if (!tag.is_float()) {
2255 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2256 }
2257 return cp->float_at(index);
2258 }
2259 JVM_END
2260
2261 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2262 {
2263 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2264 bounds_check(cp, index, CHECK_(0.0));
2265 constantTag tag = cp->tag_at(index);
2266 if (!tag.is_double()) {
2267 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2268 }
2269 return cp->double_at(index);
2270 }
2271 JVM_END
2272
2273 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2274 {
2275 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2276 bounds_check(cp, index, CHECK_NULL);
2277 constantTag tag = cp->tag_at(index);
2278 if (!tag.is_string()) {
2279 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2280 }
2281 oop str = cp->string_at(index, CHECK_NULL);
2282 return (jstring) JNIHandles::make_local(THREAD, str);
2283 }
2284 JVM_END
2285
2286 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2287 {
2288 JvmtiVMObjectAllocEventCollector oam;
2289 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2290 bounds_check(cp, index, CHECK_NULL);
2291 constantTag tag = cp->tag_at(index);
2292 if (!tag.is_symbol()) {
2293 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2294 }
2295 Symbol* sym = cp->symbol_at(index);
2296 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2297 return (jstring) JNIHandles::make_local(THREAD, str());
2298 }
2299 JVM_END
2300
2301 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2302 {
2303 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2304 bounds_check(cp, index, CHECK_0);
2305 constantTag tag = cp->tag_at(index);
2306 jbyte result = tag.value();
2307 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2308 // they are changed to the corresponding tags from the JVM spec, so that java code in
2309 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2310 if (tag.is_klass_or_reference()) {
2311 result = JVM_CONSTANT_Class;
2312 } else if (tag.is_string_index()) {
2313 result = JVM_CONSTANT_String;
2314 } else if (tag.is_method_type_in_error()) {
2315 result = JVM_CONSTANT_MethodType;
2316 } else if (tag.is_method_handle_in_error()) {
2317 result = JVM_CONSTANT_MethodHandle;
2318 } else if (tag.is_dynamic_constant_in_error()) {
2319 result = JVM_CONSTANT_Dynamic;
2320 }
2321 return result;
2322 }
2323 JVM_END
2324
2325 // Assertion support. //////////////////////////////////////////////////////////
2326
2327 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2328 assert(cls != nullptr, "bad class");
2329
2330 oop r = JNIHandles::resolve(cls);
2331 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2332 if (java_lang_Class::is_primitive(r)) return false;
2333
2334 Klass* k = java_lang_Class::as_Klass(r);
2335 assert(k->is_instance_klass(), "must be an instance klass");
2336 if (!k->is_instance_klass()) return false;
2337
2338 ResourceMark rm(THREAD);
2339 const char* name = k->name()->as_C_string();
2340 bool system_class = k->class_loader() == nullptr;
2341 return JavaAssertions::enabled(name, system_class);
2342
2343 JVM_END
2344
2345
2346 // Return a new AssertionStatusDirectives object with the fields filled in with
2347 // command-line assertion arguments (i.e., -ea, -da).
2348 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2349 JvmtiVMObjectAllocEventCollector oam;
2350 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2351 return JNIHandles::make_local(THREAD, asd);
2352 JVM_END
2353
2354 // Verification ////////////////////////////////////////////////////////////////////////////////
2355
2356 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2357
2358 // RedefineClasses support: bug 6214132 caused verification to fail.
2359 // All functions from this section should call the jvmtiThreadSate function:
2360 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2361 // The function returns a Klass* of the _scratch_class if the verifier
2362 // was invoked in the middle of the class redefinition.
2363 // Otherwise it returns its argument value which is the _the_class Klass*.
2364 // Please, refer to the description in the jvmtiThreadSate.hpp.
2365
2366 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2367 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369 return k->name()->as_utf8();
2370 JVM_END
2371
2372
2373 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2374 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2375 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2376 // types will have length zero if this is not an InstanceKlass
2377 // (length is determined by call to JVM_GetClassCPEntriesCount)
2378 if (k->is_instance_klass()) {
2379 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2380 for (int index = cp->length() - 1; index >= 0; index--) {
2381 constantTag tag = cp->tag_at(index);
2382 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2383 }
2384 }
2385 JVM_END
2386
2387
2388 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2389 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2390 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2391 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2392 JVM_END
2393
2394
2395 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2399 JVM_END
2400
2401
2402 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2403 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2404 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2406 JVM_END
2407
2408
2409 // The following methods, used for the verifier, are never called with
2410 // array klasses, so a direct cast to InstanceKlass is safe.
2411 // Typically, these methods are called in a loop with bounds determined
2412 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2413 // zero for arrays.
2414 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2415 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2416 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2417 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2418 int length = method->checked_exceptions_length();
2419 if (length > 0) {
2420 CheckedExceptionElement* table= method->checked_exceptions_start();
2421 for (int i = 0; i < length; i++) {
2422 exceptions[i] = table[i].class_cp_index;
2423 }
2424 }
2425 JVM_END
2426
2427
2428 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2432 return method->checked_exceptions_length();
2433 JVM_END
2434
2435
2436 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2439 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2440 memcpy(code, method->code_base(), method->code_size());
2441 JVM_END
2442
2443
2444 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2448 return method->code_size();
2449 JVM_END
2450
2451
2452 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2456 ExceptionTable extable(method);
2457 entry->start_pc = extable.start_pc(entry_index);
2458 entry->end_pc = extable.end_pc(entry_index);
2459 entry->handler_pc = extable.handler_pc(entry_index);
2460 entry->catchType = extable.catch_type_index(entry_index);
2461 JVM_END
2462
2463
2464 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 return method->exception_table_length();
2469 JVM_END
2470
2471
2472 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
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->access_flags().as_method_flags();
2477 JVM_END
2478
2479
2480 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 return InstanceKlass::cast(k)->field_access_flags(field_index);
2484 JVM_END
2485
2486
2487 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int 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->max_locals();
2492 JVM_END
2493
2494
2495 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2496 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2497 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2498 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2499 return method->size_of_parameters();
2500 JVM_END
2501
2502
2503 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2504 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2505 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2506 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2507 return method->verifier_max_stack();
2508 JVM_END
2509
2510
2511 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2512 ResourceMark rm(THREAD);
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2516 return method->name() == vmSymbols::object_initializer_name();
2517 JVM_END
2518
2519
2520 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2521 ResourceMark rm(THREAD);
2522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2523 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2524 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2525 return method->is_overpass();
2526 JVM_END
2527
2528 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2529 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2530 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2531 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2532 return method->name()->as_utf8();
2533 JVM_END
2534
2535
2536 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2537 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2538 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2539 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2540 return method->signature()->as_utf8();
2541 JVM_END
2542
2543 /**
2544 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2545 * read entries in the constant pool. Since the old verifier always
2546 * works on a copy of the code, it will not see any rewriting that
2547 * may possibly occur in the middle of verification. So it is important
2548 * that nothing it calls tries to use the cpCache instead of the raw
2549 * constant pool, so we must use cp->uncached_x methods when appropriate.
2550 */
2551 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2553 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2554 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2555 switch (cp->tag_at(cp_index).value()) {
2556 case JVM_CONSTANT_Fieldref:
2557 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2558 default:
2559 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2560 }
2561 ShouldNotReachHere();
2562 return nullptr;
2563 JVM_END
2564
2565
2566 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2567 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2568 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2569 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2570 switch (cp->tag_at(cp_index).value()) {
2571 case JVM_CONSTANT_InterfaceMethodref:
2572 case JVM_CONSTANT_Methodref:
2573 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2574 default:
2575 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2576 }
2577 ShouldNotReachHere();
2578 return nullptr;
2579 JVM_END
2580
2581
2582 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2583 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2584 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2585 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2586 switch (cp->tag_at(cp_index).value()) {
2587 case JVM_CONSTANT_InterfaceMethodref:
2588 case JVM_CONSTANT_Methodref:
2589 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2590 default:
2591 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2592 }
2593 ShouldNotReachHere();
2594 return nullptr;
2595 JVM_END
2596
2597
2598 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2599 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2600 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2601 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2602 switch (cp->tag_at(cp_index).value()) {
2603 case JVM_CONSTANT_Fieldref:
2604 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2605 default:
2606 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2607 }
2608 ShouldNotReachHere();
2609 return nullptr;
2610 JVM_END
2611
2612
2613 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2614 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2615 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2616 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2617 Symbol* classname = cp->klass_name_at(cp_index);
2618 return classname->as_utf8();
2619 JVM_END
2620
2621
2622 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2624 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2625 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2626 switch (cp->tag_at(cp_index).value()) {
2627 case JVM_CONSTANT_Fieldref: {
2628 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2629 Symbol* classname = cp->klass_name_at(class_index);
2630 return classname->as_utf8();
2631 }
2632 default:
2633 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2634 }
2635 ShouldNotReachHere();
2636 return nullptr;
2637 JVM_END
2638
2639
2640 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2641 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2642 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2643 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2644 switch (cp->tag_at(cp_index).value()) {
2645 case JVM_CONSTANT_Methodref:
2646 case JVM_CONSTANT_InterfaceMethodref: {
2647 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2648 Symbol* classname = cp->klass_name_at(class_index);
2649 return classname->as_utf8();
2650 }
2651 default:
2652 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2653 }
2654 ShouldNotReachHere();
2655 return nullptr;
2656 JVM_END
2657
2658
2659 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2660 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2661 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2662 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2663 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2664 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2665 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2666 switch (cp->tag_at(cp_index).value()) {
2667 case JVM_CONSTANT_Fieldref: {
2668 Symbol* name = cp->uncached_name_ref_at(cp_index);
2669 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2670 InstanceKlass* ik = InstanceKlass::cast(k_called);
2671 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2672 if (fs.name() == name && fs.signature() == signature) {
2673 return fs.access_flags().as_field_flags();
2674 }
2675 }
2676 return -1;
2677 }
2678 default:
2679 fatal("JVM_GetCPFieldModifiers: illegal constant");
2680 }
2681 ShouldNotReachHere();
2682 return 0;
2683 JVM_END
2684
2685
2686 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2687 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2688 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2689 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2690 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2691 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2692 switch (cp->tag_at(cp_index).value()) {
2693 case JVM_CONSTANT_Methodref:
2694 case JVM_CONSTANT_InterfaceMethodref: {
2695 Symbol* name = cp->uncached_name_ref_at(cp_index);
2696 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2697 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2698 int methods_count = methods->length();
2699 for (int i = 0; i < methods_count; i++) {
2700 Method* method = methods->at(i);
2701 if (method->name() == name && method->signature() == signature) {
2702 return method->access_flags().as_method_flags();
2703 }
2704 }
2705 return -1;
2706 }
2707 default:
2708 fatal("JVM_GetCPMethodModifiers: illegal constant");
2709 }
2710 ShouldNotReachHere();
2711 return 0;
2712 JVM_END
2713
2714
2715 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2716
2717 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2718 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2719 JVM_END
2720
2721
2722 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2723 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2724 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2725 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2726 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2727 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2728 JVM_END
2729
2730 // Printing support //////////////////////////////////////////////////
2731 extern "C" {
2732
2733 ATTRIBUTE_PRINTF(3, 0)
2734 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2735 // Reject count values that are negative signed values converted to
2736 // unsigned; see bug 4399518, 4417214
2737 if ((intptr_t)count <= 0) return -1;
2738
2739 int result = os::vsnprintf(str, count, fmt, args);
2740 if (result > 0 && (size_t)result >= count) {
2741 result = -1;
2742 }
2743
2744 return result;
2745 }
2746
2747 ATTRIBUTE_PRINTF(3, 4)
2748 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2749 va_list args;
2750 int len;
2751 va_start(args, fmt);
2752 len = jio_vsnprintf(str, count, fmt, args);
2753 va_end(args);
2754 return len;
2755 }
2756
2757 ATTRIBUTE_PRINTF(2, 3)
2758 int jio_fprintf(FILE* f, const char *fmt, ...) {
2759 int len;
2760 va_list args;
2761 va_start(args, fmt);
2762 len = jio_vfprintf(f, fmt, args);
2763 va_end(args);
2764 return len;
2765 }
2766
2767 ATTRIBUTE_PRINTF(2, 0)
2768 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2769 if (Arguments::vfprintf_hook() != nullptr) {
2770 return Arguments::vfprintf_hook()(f, fmt, args);
2771 } else {
2772 return vfprintf(f, fmt, args);
2773 }
2774 }
2775
2776 ATTRIBUTE_PRINTF(1, 2)
2777 JNIEXPORT int jio_printf(const char *fmt, ...) {
2778 int len;
2779 va_list args;
2780 va_start(args, fmt);
2781 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2782 va_end(args);
2783 return len;
2784 }
2785
2786 // HotSpot specific jio method
2787 void jio_print(const char* s, size_t len) {
2788 // Try to make this function as atomic as possible.
2789 if (Arguments::vfprintf_hook() != nullptr) {
2790 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2791 } else {
2792 // Make an unused local variable to avoid warning from gcc compiler.
2793 bool dummy = os::write(defaultStream::output_fd(), s, len);
2794 }
2795 }
2796
2797 } // Extern C
2798
2799 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2800
2801 // In most of the JVM thread support functions we need to access the
2802 // thread through a ThreadsListHandle to prevent it from exiting and
2803 // being reclaimed while we try to operate on it. The exceptions to this
2804 // rule are when operating on the current thread, or if the monitor of
2805 // the target java.lang.Thread is locked at the Java level - in both
2806 // cases the target cannot exit.
2807
2808 static void thread_entry(JavaThread* thread, TRAPS) {
2809 HandleMark hm(THREAD);
2810 Handle obj(THREAD, thread->threadObj());
2811 JavaValue result(T_VOID);
2812 JavaCalls::call_virtual(&result,
2813 obj,
2814 vmClasses::Thread_klass(),
2815 vmSymbols::run_method_name(),
2816 vmSymbols::void_method_signature(),
2817 THREAD);
2818 }
2819
2820
2821 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2822 #if INCLUDE_CDS
2823 if (CDSConfig::allow_only_single_java_thread()) {
2824 // During java -Xshare:dump, if we allow multiple Java threads to
2825 // execute in parallel, symbols and classes may be loaded in
2826 // random orders which will make the resulting CDS archive
2827 // non-deterministic.
2828 //
2829 // Lucikly, during java -Xshare:dump, it's important to run only
2830 // the code in the main Java thread (which is NOT started here) that
2831 // creates the module graph, etc. It's safe to not start the other
2832 // threads which are launched by class static initializers
2833 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2834 if (log_is_enabled(Info, cds)) {
2835 ResourceMark rm;
2836 oop t = JNIHandles::resolve_non_null(jthread);
2837 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2838 }
2839 return;
2840 }
2841 #endif
2842 JavaThread *native_thread = nullptr;
2843
2844 // We cannot hold the Threads_lock when we throw an exception,
2845 // due to rank ordering issues. Example: we might need to grab the
2846 // Heap_lock while we construct the exception.
2847 bool throw_illegal_thread_state = false;
2848
2849 // We must release the Threads_lock before we can post a jvmti event
2850 // in Thread::start.
2851 {
2852 ConditionalMutexLocker throttle_ml(ThreadsLockThrottle_lock, UseThreadsLockThrottleLock);
2853 // Ensure that the C++ Thread and OSThread structures aren't freed before
2854 // we operate.
2855 MutexLocker ml(Threads_lock);
2856
2857 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2858 // re-starting an already started thread, so we should usually find
2859 // that the JavaThread is null. However for a JNI attached thread
2860 // there is a small window between the Thread object being created
2861 // (with its JavaThread set) and the update to its threadStatus, so we
2862 // have to check for this
2863 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) {
2864 throw_illegal_thread_state = true;
2865 } else {
2866 jlong size =
2867 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2868 // Allocate the C++ Thread structure and create the native thread. The
2869 // stack size retrieved from java is 64-bit signed, but the constructor takes
2870 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2871 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2872 // - Avoid passing negative values which would result in really large stacks.
2873 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2874 size_t sz = size > 0 ? (size_t) size : 0;
2875 native_thread = new JavaThread(&thread_entry, sz);
2876
2877 // At this point it may be possible that no osthread was created for the
2878 // JavaThread due to lack of memory. Check for this situation and throw
2879 // an exception if necessary. Eventually we may want to change this so
2880 // that we only grab the lock if the thread was created successfully -
2881 // then we can also do this check and throw the exception in the
2882 // JavaThread constructor.
2883 if (native_thread->osthread() != nullptr) {
2884 // Note: the current thread is not being used within "prepare".
2885 native_thread->prepare(jthread);
2886 }
2887 }
2888 }
2889
2890 if (throw_illegal_thread_state) {
2891 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2892 }
2893
2894 assert(native_thread != nullptr, "Starting null thread?");
2895
2896 if (native_thread->osthread() == nullptr) {
2897 ResourceMark rm(thread);
2898 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2899 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2900 // No one should hold a reference to the 'native_thread'.
2901 native_thread->smr_delete();
2902 if (JvmtiExport::should_post_resource_exhausted()) {
2903 JvmtiExport::post_resource_exhausted(
2904 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2905 os::native_thread_creation_failed_msg());
2906 }
2907 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2908 os::native_thread_creation_failed_msg());
2909 }
2910
2911 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2912
2913 Thread::start(native_thread);
2914
2915 JVM_END
2916
2917
2918 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2919 ThreadsListHandle tlh(thread);
2920 oop java_thread = nullptr;
2921 JavaThread* receiver = nullptr;
2922 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2923 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2924
2925 if (is_alive) {
2926 // jthread refers to a live JavaThread.
2927 Thread::set_priority(receiver, (ThreadPriority)prio);
2928 }
2929 // Implied else: If the JavaThread hasn't started yet, then the
2930 // priority set in the java.lang.Thread object above will be pushed
2931 // down when it does start.
2932 JVM_END
2933
2934
2935 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2936 HOTSPOT_THREAD_YIELD();
2937 os::naked_yield();
2938 JVM_END
2939
2940 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2941 if (nanos < 0) {
2942 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2943 }
2944
2945 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2946 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2947 }
2948
2949 // Save current thread state and restore it at the end of this block.
2950 // And set new thread state to SLEEPING.
2951 JavaThreadSleepState jtss(thread);
2952
2953 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2954
2955 if (nanos == 0) {
2956 os::naked_yield();
2957 } else {
2958 ThreadState old_state = thread->osthread()->get_state();
2959 thread->osthread()->set_state(SLEEPING);
2960 if (!thread->sleep_nanos(nanos)) { // interrupted
2961 // An asynchronous exception could have been thrown on
2962 // us while we were sleeping. We do not overwrite those.
2963 if (!HAS_PENDING_EXCEPTION) {
2964 HOTSPOT_THREAD_SLEEP_END(1);
2965
2966 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2967 // to properly restore the thread state. That's likely wrong.
2968 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2969 }
2970 }
2971 thread->osthread()->set_state(old_state);
2972 }
2973 HOTSPOT_THREAD_SLEEP_END(0);
2974 JVM_END
2975
2976 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2977 oop jthread = thread->threadObj();
2978 assert(jthread != nullptr, "no current carrier thread!");
2979 return JNIHandles::make_local(THREAD, jthread);
2980 JVM_END
2981
2982 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2983 oop theThread = thread->vthread();
2984 assert(theThread != (oop)nullptr, "no current thread!");
2985 return JNIHandles::make_local(THREAD, theThread);
2986 JVM_END
2987
2988 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2989 jobject theThread))
2990 oop threadObj = JNIHandles::resolve(theThread);
2991 thread->set_vthread(threadObj);
2992
2993 // Set _monitor_owner_id of new current Thread
2994 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2995
2996 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2997 JVM_END
2998
2999 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
3000 return ThreadIdentifier::unsafe_offset();
3001 JVM_END
3002
3003 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
3004 ThreadsListHandle tlh(thread);
3005 JavaThread* receiver = nullptr;
3006 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
3007 if (is_alive) {
3008 // jthread refers to a live JavaThread.
3009 receiver->interrupt();
3010 }
3011 JVM_END
3012
3013 // Return true iff the current thread has locked the object passed in
3014
3015 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3016 if (obj == nullptr) {
3017 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3018 }
3019 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3020 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3021 JVM_END
3022
3023 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3024 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3025 return JNIHandles::make_local(THREAD, trace);
3026 JVM_END
3027
3028
3029 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3030 // We don't use a ThreadsListHandle here because the current thread
3031 // must be alive.
3032 oop java_thread = JNIHandles::resolve_non_null(jthread);
3033 JavaThread* thr = java_lang_Thread::thread(java_thread);
3034 if (thread == thr && !thr->has_attached_via_jni()) {
3035 // Thread naming is only supported for the current thread and
3036 // we don't set the name of an attached thread to avoid stepping
3037 // on other programs.
3038 ResourceMark rm(thread);
3039 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3040 os::set_native_thread_name(thread_name);
3041 }
3042 JVM_END
3043
3044 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3045 oop theCache = thread->scopedValueCache();
3046 return JNIHandles::make_local(THREAD, theCache);
3047 JVM_END
3048
3049 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3050 jobject theCache))
3051 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3052 thread->set_scopedValueCache(objs);
3053 JVM_END
3054
3055 // java.lang.Package ////////////////////////////////////////////////////////////////
3056
3057
3058 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3059 ResourceMark rm(THREAD);
3060 JvmtiVMObjectAllocEventCollector oam;
3061 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3062 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3063 return (jstring) JNIHandles::make_local(THREAD, result);
3064 JVM_END
3065
3066
3067 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3068 JvmtiVMObjectAllocEventCollector oam;
3069 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3070 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3071 JVM_END
3072
3073
3074 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3075
3076
3077 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3078 MonitorLocker ml(Heap_lock);
3079 oop ref = Universe::reference_pending_list();
3080 if (ref != nullptr) {
3081 Universe::clear_reference_pending_list();
3082 }
3083 return JNIHandles::make_local(THREAD, ref);
3084 JVM_END
3085
3086 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3087 MonitorLocker ml(Heap_lock);
3088 return Universe::has_reference_pending_list();
3089 JVM_END
3090
3091 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3092 MonitorLocker ml(Heap_lock);
3093 while (!Universe::has_reference_pending_list()) {
3094 ml.wait();
3095 }
3096 JVM_END
3097
3098 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3099 oop ref_oop = JNIHandles::resolve_non_null(ref);
3100 // PhantomReference has it's own implementation of refersTo().
3101 // See: JVM_PhantomReferenceRefersTo
3102 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3103 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3104 return referent == JNIHandles::resolve(o);
3105 JVM_END
3106
3107 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3108 oop ref_oop = JNIHandles::resolve_non_null(ref);
3109 // FinalReference has it's own implementation of clear().
3110 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3111 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3112 // If the referent has already been cleared then done.
3113 // However, if the referent is dead but has not yet been cleared by
3114 // concurrent reference processing, it should NOT be cleared here.
3115 // Instead, clearing should be left to the GC. Clearing it here could
3116 // detectably lose an expected notification, which is impossible with
3117 // STW reference processing. The clearing in enqueue() doesn't have
3118 // this problem, since the enqueue covers the notification, but it's not
3119 // worth the effort to handle that case specially.
3120 return;
3121 }
3122 java_lang_ref_Reference::clear_referent(ref_oop);
3123 JVM_END
3124
3125
3126 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3127
3128
3129 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3130 oop ref_oop = JNIHandles::resolve_non_null(ref);
3131 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3132 return referent == JNIHandles::resolve(o);
3133 JVM_END
3134
3135
3136 // ObjectInputStream ///////////////////////////////////////////////////////////////
3137
3138 // Return the first user-defined class loader up the execution stack, or null
3139 // if only code from the bootstrap or platform class loader is on the stack.
3140
3141 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3142 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3143 InstanceKlass* ik = vfst.method()->method_holder();
3144 oop loader = ik->class_loader();
3145 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3146 return JNIHandles::make_local(THREAD, loader);
3147 }
3148 }
3149 return nullptr;
3150 JVM_END
3151
3152
3153 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3154
3155
3156 // resolve array handle and check arguments
3157 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3158 if (arr == nullptr) {
3159 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3160 }
3161 oop a = JNIHandles::resolve_non_null(arr);
3162 if (!a->is_array()) {
3163 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3164 } else if (type_array_only && !a->is_typeArray()) {
3165 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3166 }
3167 return arrayOop(a);
3168 }
3169
3170
3171 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3172 arrayOop a = check_array(env, arr, false, CHECK_0);
3173 return a->length();
3174 JVM_END
3175
3176
3177 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3178 JvmtiVMObjectAllocEventCollector oam;
3179 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3180 jvalue value;
3181 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3182 oop box = Reflection::box(&value, type, CHECK_NULL);
3183 return JNIHandles::make_local(THREAD, box);
3184 JVM_END
3185
3186
3187 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3188 jvalue value;
3189 value.i = 0; // to initialize value before getting used in CHECK
3190 arrayOop a = check_array(env, arr, true, CHECK_(value));
3191 assert(a->is_typeArray(), "just checking");
3192 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3193 BasicType wide_type = (BasicType) wCode;
3194 if (type != wide_type) {
3195 Reflection::widen(&value, type, wide_type, CHECK_(value));
3196 }
3197 return value;
3198 JVM_END
3199
3200
3201 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3202 arrayOop a = check_array(env, arr, false, CHECK);
3203 oop box = JNIHandles::resolve(val);
3204 jvalue value;
3205 value.i = 0; // to initialize value before getting used in CHECK
3206 BasicType value_type;
3207 if (a->is_objArray()) {
3208 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3209 value_type = Reflection::unbox_for_regular_object(box, &value);
3210 } else {
3211 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3212 }
3213 Reflection::array_set(&value, a, index, value_type, CHECK);
3214 JVM_END
3215
3216
3217 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3218 arrayOop a = check_array(env, arr, true, CHECK);
3219 assert(a->is_typeArray(), "just checking");
3220 BasicType value_type = (BasicType) vCode;
3221 Reflection::array_set(&v, a, index, value_type, CHECK);
3222 JVM_END
3223
3224
3225 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3226 JvmtiVMObjectAllocEventCollector oam;
3227 oop element_mirror = JNIHandles::resolve(eltClass);
3228 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3229 return JNIHandles::make_local(THREAD, result);
3230 JVM_END
3231
3232
3233 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3234 JvmtiVMObjectAllocEventCollector oam;
3235 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3236 oop element_mirror = JNIHandles::resolve(eltClass);
3237 assert(dim_array->is_typeArray(), "just checking");
3238 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3239 return JNIHandles::make_local(THREAD, result);
3240 JVM_END
3241
3242
3243 // Library support ///////////////////////////////////////////////////////////////////////////
3244
3245 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3246 return ZipLibrary::handle();
3247 JVM_END
3248
3249 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3250 //%note jvm_ct
3251 char ebuf[1024];
3252 void *load_result;
3253 {
3254 ThreadToNativeFromVM ttnfvm(thread);
3255 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3256 }
3257 if (load_result == nullptr) {
3258 if (throwException) {
3259 char msg[1024];
3260 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3261 // Since 'ebuf' may contain a string encoded using
3262 // platform encoding scheme, we need to pass
3263 // Exceptions::unsafe_to_utf8 to the new_exception method
3264 // as the last argument. See bug 6367357.
3265 Handle h_exception =
3266 Exceptions::new_exception(thread,
3267 vmSymbols::java_lang_UnsatisfiedLinkError(),
3268 msg, Exceptions::unsafe_to_utf8);
3269
3270 THROW_HANDLE_NULL(h_exception);
3271 } else {
3272 log_info(library)("Failed to load library %s", name);
3273 return load_result;
3274 }
3275 }
3276 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3277 return load_result;
3278 JVM_END
3279
3280
3281 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3282 os::dll_unload(handle);
3283 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3284 JVM_END
3285
3286
3287 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3288 void* find_result = os::dll_lookup(handle, name);
3289 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3290 find_result != nullptr ? "Found" : "Failed to find",
3291 name, p2i(handle));
3292 return find_result;
3293 JVM_END
3294
3295
3296 // JNI version ///////////////////////////////////////////////////////////////////////////////
3297
3298 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3299 return Threads::is_supported_jni_version_including_1_1(version);
3300 JVM_END
3301
3302
3303 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3304 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3305 JVM_END
3306
3307 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3308 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3309 JVM_END
3310
3311 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3312 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3313 JVM_END
3314
3315 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3316 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3317 JVM_END
3318
3319 // String support ///////////////////////////////////////////////////////////////////////////
3320
3321 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3322 JvmtiVMObjectAllocEventCollector oam;
3323 if (str == nullptr) return nullptr;
3324 oop string = JNIHandles::resolve_non_null(str);
3325 oop result = StringTable::intern(string, CHECK_NULL);
3326 return (jstring) JNIHandles::make_local(THREAD, result);
3327 JVM_END
3328
3329
3330 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3331
3332 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3333 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3334 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3335 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3336 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3337 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3338
3339
3340 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3341 VM_Exit::block_if_vm_exited();
3342 return new PlatformMutex();
3343 }
3344
3345
3346 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3347 VM_Exit::block_if_vm_exited();
3348 delete ((PlatformMutex*) mon);
3349 }
3350
3351
3352 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3353 VM_Exit::block_if_vm_exited();
3354 ((PlatformMutex*) mon)->lock();
3355 return 0;
3356 }
3357
3358
3359 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3360 VM_Exit::block_if_vm_exited();
3361 ((PlatformMutex*) mon)->unlock();
3362 }
3363
3364
3365 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3366
3367 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3368 Handle loader, jboolean throwError, TRAPS) {
3369 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3370
3371 // Check if we should initialize the class
3372 if (init && klass->is_instance_klass()) {
3373 klass->initialize(CHECK_NULL);
3374 }
3375 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3376 }
3377
3378
3379 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3380
3381 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3382 Handle method_handle;
3383 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3384 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3385 Handle receiver(THREAD, JNIHandles::resolve(obj));
3386 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3387 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3388 jobject res = JNIHandles::make_local(THREAD, result);
3389 if (JvmtiExport::should_post_vm_object_alloc()) {
3390 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3391 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3392 if (java_lang_Class::is_primitive(ret_type)) {
3393 // Only for primitive type vm allocates memory for java object.
3394 // See box() method.
3395 JvmtiExport::post_vm_object_alloc(thread, result);
3396 }
3397 }
3398 return res;
3399 } else {
3400 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3401 }
3402 JVM_END
3403
3404
3405 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3406 oop constructor_mirror = JNIHandles::resolve(c);
3407 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3408 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3409 jobject res = JNIHandles::make_local(THREAD, result);
3410 if (JvmtiExport::should_post_vm_object_alloc()) {
3411 JvmtiExport::post_vm_object_alloc(thread, result);
3412 }
3413 return res;
3414 JVM_END
3415
3416 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3418 assert(k->is_klass(), "just checking");
3419 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3420 JVM_END
3421
3422 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3423 jclass caller,
3424 jstring interfaceMethodName,
3425 jobject factoryType,
3426 jobject interfaceMethodType,
3427 jobject implementationMember,
3428 jobject dynamicMethodType,
3429 jclass lambdaProxyClass))
3430 #if INCLUDE_CDS
3431 if (!CDSConfig::is_dumping_archive()) {
3432 return;
3433 }
3434
3435 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3436 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3437 if (caller_ik->is_hidden()) {
3438 // Hidden classes not of type lambda proxy classes are currently not being archived.
3439 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3440 // registered for archiving.
3441 return;
3442 }
3443 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass));
3444 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k);
3445 assert(lambda_ik->is_hidden(), "must be a hidden class");
3446 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3447
3448 Symbol* interface_method_name = nullptr;
3449 if (interfaceMethodName != nullptr) {
3450 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3451 }
3452 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3453 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3454
3455 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3456 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3457
3458 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3459 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3460 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3461
3462 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3463 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3464
3465 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3466 interface_method_type, m, dynamic_method_type, THREAD);
3467 #endif // INCLUDE_CDS
3468 JVM_END
3469
3470 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3471 jclass caller,
3472 jstring interfaceMethodName,
3473 jobject factoryType,
3474 jobject interfaceMethodType,
3475 jobject implementationMember,
3476 jobject dynamicMethodType))
3477 #if INCLUDE_CDS
3478
3479 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3480 implementationMember == nullptr || dynamicMethodType == nullptr) {
3481 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3482 }
3483
3484 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3485 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3486 if (!caller_ik->is_shared()) {
3487 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3488 return nullptr;
3489 }
3490
3491 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3492 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3493 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3494
3495 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3496 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3497
3498 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3499 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3500 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3501
3502 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3503 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3504
3505 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3506 interface_method_type, m, dynamic_method_type);
3507 jclass jcls = nullptr;
3508 if (lambda_ik != nullptr) {
3509 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3510 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3511 }
3512 return jcls;
3513 #else
3514 return nullptr;
3515 #endif // INCLUDE_CDS
3516 JVM_END
3517
3518 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3519 if (CDSConfig::is_dumping_static_archive()) {
3520 // We do this so that the default CDS archive can be deterministic.
3521 const char* release = VM_Version::vm_release();
3522 const char* dbg_level = VM_Version::jdk_debug_level();
3523 const char* version = VM_Version::internal_vm_info_string();
3524 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3525 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3526 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3527 seed += (jlong)VM_Version::vm_major_version();
3528 seed += (jlong)VM_Version::vm_minor_version();
3529 seed += (jlong)VM_Version::vm_security_version();
3530 seed += (jlong)VM_Version::vm_patch_version();
3531 if (seed == 0) { // don't let this ever be zero.
3532 seed = 0x87654321;
3533 }
3534 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3535 return seed;
3536 } else {
3537 return 0;
3538 }
3539 JVM_END
3540
3541 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3542 return CDSConfig::get_status();
3543 JVM_END
3544
3545 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3546 #if INCLUDE_CDS
3547 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3548 if (line != nullptr) {
3549 ResourceMark rm(THREAD);
3550 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3551 char* c_line = java_lang_String::as_utf8_string(h_line());
3552 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3553 // Note: LambdaFormInvokers::append take same format which is not
3554 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3555 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3556 }
3557 if (ClassListWriter::is_enabled()) {
3558 ClassListWriter w;
3559 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3560 }
3561 }
3562 #endif // INCLUDE_CDS
3563 JVM_END
3564
3565 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3566 #if INCLUDE_CDS
3567 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity");
3568
3569 ResourceMark rm(THREAD);
3570 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3571 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3572 oop loader_oop = JNIHandles::resolve(loader);
3573 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3574
3575 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3576 #endif // INCLUDE_CDS
3577 JVM_END
3578
3579 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3580 #if INCLUDE_CDS
3581 ResourceMark rm(THREAD);
3582 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3583 char* file_name = java_lang_String::as_utf8_string(file_handle());
3584 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3585 #endif // INCLUDE_CDS
3586 JVM_END
3587
3588 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3589 #if INCLUDE_CDS
3590 ResourceMark rm(THREAD);
3591 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3592 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3593 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3594 #endif // INCLUDE_CDS
3595 JVM_END
3596
3597 // Returns an array of all live Thread objects (VM internal JavaThreads,
3598 // jvmti agent threads, and JNI attaching threads are skipped)
3599 // See CR 6404306 regarding JNI attaching threads
3600 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3601 ResourceMark rm(THREAD);
3602 ThreadsListEnumerator tle(THREAD, false, false);
3603 JvmtiVMObjectAllocEventCollector oam;
3604
3605 int num_threads = tle.num_threads();
3606 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3607 objArrayHandle threads_ah(THREAD, r);
3608
3609 for (int i = 0; i < num_threads; i++) {
3610 Handle h = tle.get_threadObj(i);
3611 threads_ah->obj_at_put(i, h());
3612 }
3613
3614 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3615 JVM_END
3616
3617
3618 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3619 // Return StackTraceElement[][], each element is the stack trace of a thread in
3620 // the corresponding entry in the given threads array
3621 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3622 JvmtiVMObjectAllocEventCollector oam;
3623
3624 // Check if threads is null
3625 if (threads == nullptr) {
3626 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3627 }
3628
3629 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3630 objArrayHandle ah(THREAD, a);
3631 int num_threads = ah->length();
3632 // check if threads is non-empty array
3633 if (num_threads == 0) {
3634 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3635 }
3636
3637 // check if threads is not an array of objects of Thread class
3638 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3639 if (k != vmClasses::Thread_klass()) {
3640 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3641 }
3642
3643 ResourceMark rm(THREAD);
3644
3645 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3646 for (int i = 0; i < num_threads; i++) {
3647 oop thread_obj = ah->obj_at(i);
3648 instanceHandle h(THREAD, (instanceOop) thread_obj);
3649 thread_handle_array->append(h);
3650 }
3651
3652 // The JavaThread references in thread_handle_array are validated
3653 // in VM_ThreadDump::doit().
3654 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3655 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3656
3657 JVM_END
3658
3659 // JVM monitoring and management support
3660 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3661 return Management::get_jmm_interface(version);
3662 JVM_END
3663
3664 // com.sun.tools.attach.VirtualMachine agent properties support
3665 //
3666 // Initialize the agent properties with the properties maintained in the VM
3667 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3668 ResourceMark rm;
3669
3670 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3671
3672 PUTPROP(props, "sun.java.command", Arguments::java_command());
3673 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3674 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3675 return properties;
3676 JVM_END
3677
3678 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3679 {
3680 JvmtiVMObjectAllocEventCollector oam;
3681
3682 if (ofClass == nullptr) {
3683 return nullptr;
3684 }
3685 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3686 // Special handling for primitive objects
3687 if (java_lang_Class::is_primitive(mirror())) {
3688 return nullptr;
3689 }
3690 Klass* k = java_lang_Class::as_Klass(mirror());
3691 if (!k->is_instance_klass()) {
3692 return nullptr;
3693 }
3694 InstanceKlass* ik = InstanceKlass::cast(k);
3695 int encl_method_class_idx = ik->enclosing_method_class_index();
3696 if (encl_method_class_idx == 0) {
3697 return nullptr;
3698 }
3699 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3700 objArrayHandle dest(THREAD, dest_o);
3701 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3702 dest->obj_at_put(0, enc_k->java_mirror());
3703 int encl_method_method_idx = ik->enclosing_method_method_index();
3704 if (encl_method_method_idx != 0) {
3705 Symbol* sym = ik->constants()->symbol_at(
3706 extract_low_short_from_int(
3707 ik->constants()->name_and_type_at(encl_method_method_idx)));
3708 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3709 dest->obj_at_put(1, str());
3710 sym = ik->constants()->symbol_at(
3711 extract_high_short_from_int(
3712 ik->constants()->name_and_type_at(encl_method_method_idx)));
3713 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3714 dest->obj_at_put(2, str());
3715 }
3716 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3717 }
3718 JVM_END
3719
3720 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3721 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3722 ResourceMark rm(THREAD);
3723
3724 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3725 return nullptr;
3726 }
3727
3728 char** vm_flags = Arguments::jvm_flags_array();
3729 char** vm_args = Arguments::jvm_args_array();
3730 int num_flags = Arguments::num_jvm_flags();
3731 int num_args = Arguments::num_jvm_args();
3732
3733 InstanceKlass* ik = vmClasses::String_klass();
3734 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3735 objArrayHandle result_h(THREAD, r);
3736
3737 int index = 0;
3738 for (int j = 0; j < num_flags; j++, index++) {
3739 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3740 result_h->obj_at_put(index, h());
3741 }
3742 for (int i = 0; i < num_args; i++, index++) {
3743 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3744 result_h->obj_at_put(index, h());
3745 }
3746 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3747 JVM_END
3748
3749 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3750 return os::get_signal_number(name);
3751 JVM_END
3752
3753 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3754 #if INCLUDE_JVMTI
3755 if (!DoJVMTIVirtualThreadTransitions) {
3756 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3757 return;
3758 }
3759 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3760 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3761 } else {
3762 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3763 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3764 }
3765 #endif
3766 JVM_END
3767
3768 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3769 #if INCLUDE_JVMTI
3770 if (!DoJVMTIVirtualThreadTransitions) {
3771 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3772 return;
3773 }
3774 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3775 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3776 } else {
3777 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3778 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3779 }
3780 #endif
3781 JVM_END
3782
3783 // If notifications are disabled then just update the VTMS transition bit and return.
3784 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3785 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3786 #if INCLUDE_JVMTI
3787 if (!DoJVMTIVirtualThreadTransitions) {
3788 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3789 return;
3790 }
3791 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3792 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3793 } else {
3794 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3795 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3796 }
3797 #endif
3798 JVM_END
3799
3800 // If notifications are disabled then just update the VTMS transition bit and return.
3801 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3802 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3803 #if INCLUDE_JVMTI
3804 if (!DoJVMTIVirtualThreadTransitions) {
3805 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3806 return;
3807 }
3808 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3809 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3810 } else {
3811 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3812 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3813 }
3814 #endif
3815 JVM_END
3816
3817 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3818 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3819 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3820 #if INCLUDE_JVMTI
3821 if (!DoJVMTIVirtualThreadTransitions) {
3822 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3823 return;
3824 }
3825 assert(thread->is_disable_suspend() != (bool)enter,
3826 "nested or unbalanced monitor enter/exit is not allowed");
3827 thread->toggle_is_disable_suspend();
3828 #endif
3829 JVM_END
3830
3831 JVM_ENTRY(void, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3832 #if INCLUDE_JFR
3833 freeze_result result = THREAD->last_freeze_fail_result();
3834 assert(result != freeze_ok, "sanity check");
3835 EventVirtualThreadPinned event(UNTIMED);
3836 event.set_starttime(THREAD->last_freeze_fail_time());
3837 if (event.should_commit()) {
3838 ResourceMark rm(THREAD);
3839 const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3840 THREAD->post_vthread_pinned_event(&event, str, result);
3841 }
3842 #endif
3843 JVM_END
3844
3845 JVM_ENTRY(jobject, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3846 ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3847 assert(parkEvent != nullptr, "not initialized");
3848
3849 OopHandle& list_head = ObjectMonitor::vthread_cxq_head();
3850 oop vthread_head = nullptr;
3851 while (true) {
3852 if (list_head.peek() != nullptr) {
3853 for (;;) {
3854 oop head = list_head.resolve();
3855 if (list_head.cmpxchg(head, nullptr) == head) {
3856 return JNIHandles::make_local(THREAD, head);
3857 }
3858 }
3859 }
3860 ThreadBlockInVM tbivm(THREAD);
3861 parkEvent->park();
3862 }
3863 JVM_END
3864 /*
3865 * Return the current class's class file version. The low order 16 bits of the
3866 * returned jint contain the class's major version. The high order 16 bits
3867 * contain the class's minor version.
3868 */
3869 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3870 oop mirror = JNIHandles::resolve_non_null(current);
3871 if (java_lang_Class::is_primitive(mirror)) {
3872 // return latest major version and minor version of 0.
3873 return JVM_CLASSFILE_MAJOR_VERSION;
3874 }
3875 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
3876
3877 Klass* c = java_lang_Class::as_Klass(mirror);
3878 assert(c->is_instance_klass(), "must be");
3879 InstanceKlass* ik = InstanceKlass::cast(c);
3880 return (ik->minor_version() << 16) | ik->major_version();
3881 JVM_END
3882
3883 /*
3884 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3885 * get the value will see a materialized value and not a scalar-replaced
3886 * null value.
3887 */
3888 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3889 JVM_EnsureMaterializedForStackWalk(env, value);
3890 JVM_END
3891
3892 /*
3893 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3894 */
3895 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3896 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3897 JVM_END
3898
3899 #define DO_COUNTERS(macro) \
3900 macro(JVM_CurrentTimeMillis) \
3901 macro(JVM_NanoTime) \
3902 macro(JVM_GetNanoTimeAdjustment) \
3903 macro(JVM_ArrayCopy) \
3904 macro(JVM_GetProperties) \
3905 macro(JVM_GetTemporaryDirectory) \
3906 macro(JVM_BeforeHalt) \
3907 macro(JVM_Halt) \
3908 macro(JVM_GC) \
3909 macro(JVM_MaxObjectInspectionAge) \
3910 macro(JVM_TotalMemory) \
3911 macro(JVM_FreeMemory) \
3912 macro(JVM_MaxMemory) \
3913 macro(JVM_ActiveProcessorCount) \
3914 macro(JVM_IsUseContainerSupport) \
3915 macro(JVM_FillInStackTrace) \
3916 macro(JVM_GetExtendedNPEMessage) \
3917 macro(JVM_InitStackTraceElementArray) \
3918 macro(JVM_InitStackTraceElement) \
3919 macro(JVM_ExpandStackFrameInfo) \
3920 macro(JVM_CallStackWalk) \
3921 macro(JVM_MoreStackWalk) \
3922 macro(JVM_SetStackWalkContinuation) \
3923 macro(JVM_IHashCode) \
3924 macro(JVM_MonitorWait) \
3925 macro(JVM_MonitorNotify) \
3926 macro(JVM_MonitorNotifyAll) \
3927 macro(JVM_Clone) \
3928 macro(JVM_ReportFinalizationComplete) \
3929 macro(JVM_IsFinalizationEnabled) \
3930 macro(JVM_RegisterContinuationMethods) \
3931 macro(JVM_NativePath) \
3932 macro(JVM_GetCallerClass) \
3933 macro(JVM_FindPrimitiveClass) \
3934 macro(JVM_FindClassFromBootLoader) \
3935 macro(JVM_FindClassFromCaller) \
3936 macro(JVM_FindClassFromClass) \
3937 macro(JVM_DefineClass) \
3938 macro(JVM_LookupDefineClass) \
3939 macro(JVM_DefineClassWithSource) \
3940 macro(JVM_FindLoadedClass) \
3941 macro(JVM_DefineModule) \
3942 macro(JVM_SetBootLoaderUnnamedModule) \
3943 macro(JVM_AddModuleExports) \
3944 macro(JVM_AddModuleExportsToAllUnnamed) \
3945 macro(JVM_AddModuleExportsToAll) \
3946 macro(JVM_AddReadsModule) \
3947 macro(JVM_DefineArchivedModules) \
3948 macro(JVM_InitClassName) \
3949 macro(JVM_GetClassInterfaces) \
3950 macro(JVM_IsInterface) \
3951 macro(JVM_IsHiddenClass) \
3952 macro(JVM_GetProtectionDomain) \
3953 macro(JVM_FindScopedValueBindings) \
3954 macro(JVM_IsArrayClass) \
3955 macro(JVM_IsPrimitiveClass) \
3956 macro(JVM_GetClassModifiers) \
3957 macro(JVM_GetDeclaredClasses) \
3958 macro(JVM_GetDeclaringClass) \
3959 macro(JVM_GetSimpleBinaryName) \
3960 macro(JVM_GetClassSignature) \
3961 macro(JVM_GetClassAnnotations) \
3962 macro(JVM_GetClassTypeAnnotations) \
3963 macro(JVM_GetMethodTypeAnnotations) \
3964 macro(JVM_GetFieldTypeAnnotations) \
3965 macro(JVM_GetMethodParameters) \
3966 macro(JVM_GetClassDeclaredFields) \
3967 macro(JVM_IsRecord) \
3968 macro(JVM_GetRecordComponents) \
3969 macro(JVM_GetClassDeclaredMethods) \
3970 macro(JVM_GetClassDeclaredConstructors) \
3971 macro(JVM_GetClassAccessFlags) \
3972 macro(JVM_AreNestMates) \
3973 macro(JVM_GetNestHost) \
3974 macro(JVM_GetNestMembers) \
3975 macro(JVM_GetPermittedSubclasses) \
3976 macro(JVM_GetClassConstantPool) \
3977 macro(JVM_ConstantPoolGetSize) \
3978 macro(JVM_ConstantPoolGetClassAt) \
3979 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3980 macro(JVM_ConstantPoolGetMethodAt) \
3981 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3982 macro(JVM_ConstantPoolGetFieldAt) \
3983 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3984 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3985 macro(JVM_ConstantPoolGetClassRefIndexAt) \
3986 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3987 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3988 macro(JVM_ConstantPoolGetIntAt) \
3989 macro(JVM_ConstantPoolGetLongAt) \
3990 macro(JVM_ConstantPoolGetFloatAt) \
3991 macro(JVM_ConstantPoolGetDoubleAt) \
3992 macro(JVM_ConstantPoolGetStringAt) \
3993 macro(JVM_ConstantPoolGetUTF8At) \
3994 macro(JVM_ConstantPoolGetTagAt) \
3995 macro(JVM_DesiredAssertionStatus) \
3996 macro(JVM_AssertionStatusDirectives) \
3997 macro(JVM_GetClassNameUTF) \
3998 macro(JVM_GetClassCPTypes) \
3999 macro(JVM_GetClassCPEntriesCount) \
4000 macro(JVM_GetClassFieldsCount) \
4001 macro(JVM_GetClassMethodsCount) \
4002 macro(JVM_GetMethodIxExceptionIndexes) \
4003 macro(JVM_GetMethodIxExceptionsCount) \
4004 macro(JVM_GetMethodIxByteCode) \
4005 macro(JVM_GetMethodIxByteCodeLength) \
4006 macro(JVM_GetMethodIxExceptionTableEntry) \
4007 macro(JVM_GetMethodIxExceptionTableLength) \
4008 macro(JVM_GetMethodIxModifiers) \
4009 macro(JVM_GetFieldIxModifiers) \
4010 macro(JVM_GetMethodIxLocalsCount) \
4011 macro(JVM_GetMethodIxArgsSize) \
4012 macro(JVM_GetMethodIxMaxStack) \
4013 macro(JVM_IsConstructorIx) \
4014 macro(JVM_IsVMGeneratedMethodIx) \
4015 macro(JVM_GetMethodIxNameUTF) \
4016 macro(JVM_GetMethodIxSignatureUTF) \
4017 macro(JVM_GetCPFieldNameUTF) \
4018 macro(JVM_GetCPMethodNameUTF) \
4019 macro(JVM_GetCPMethodSignatureUTF) \
4020 macro(JVM_GetCPFieldSignatureUTF) \
4021 macro(JVM_GetCPClassNameUTF) \
4022 macro(JVM_GetCPFieldClassNameUTF) \
4023 macro(JVM_GetCPMethodClassNameUTF) \
4024 macro(JVM_GetCPFieldModifiers) \
4025 macro(JVM_GetCPMethodModifiers) \
4026 macro(JVM_ReleaseUTF) \
4027 macro(JVM_IsSameClassPackage) \
4028 macro(JVM_StartThread) \
4029 macro(JVM_SetThreadPriority) \
4030 macro(JVM_Yield) \
4031 macro(JVM_SleepNanos) \
4032 macro(JVM_CurrentCarrierThread) \
4033 macro(JVM_CurrentThread) \
4034 macro(JVM_SetCurrentThread) \
4035 macro(JVM_GetNextThreadIdOffset) \
4036 macro(JVM_Interrupt) \
4037 macro(JVM_HoldsLock) \
4038 macro(JVM_GetStackTrace) \
4039 macro(JVM_SetNativeThreadName) \
4040 macro(JVM_ScopedValueCache) \
4041 macro(JVM_SetScopedValueCache) \
4042 macro(JVM_GetSystemPackage) \
4043 macro(JVM_GetSystemPackages) \
4044 macro(JVM_GetAndClearReferencePendingList) \
4045 macro(JVM_HasReferencePendingList) \
4046 macro(JVM_WaitForReferencePendingList) \
4047 macro(JVM_ReferenceRefersTo) \
4048 macro(JVM_ReferenceClear) \
4049 macro(JVM_PhantomReferenceRefersTo) \
4050 macro(JVM_LatestUserDefinedLoader) \
4051 macro(JVM_GetArrayLength) \
4052 macro(JVM_GetArrayElement) \
4053 macro(JVM_GetPrimitiveArrayElement) \
4054 macro(JVM_SetArrayElement) \
4055 macro(JVM_SetPrimitiveArrayElement) \
4056 macro(JVM_NewArray) \
4057 macro(JVM_NewMultiArray) \
4058 macro(JVM_LoadZipLibrary) \
4059 macro(JVM_LoadLibrary) \
4060 macro(JVM_UnloadLibrary) \
4061 macro(JVM_FindLibraryEntry) \
4062 macro(JVM_IsSupportedJNIVersion) \
4063 macro(JVM_IsPreviewEnabled) \
4064 macro(JVM_IsContinuationsSupported) \
4065 macro(JVM_IsForeignLinkerSupported) \
4066 macro(JVM_InternString) \
4067 macro(JVM_InvokeMethod) \
4068 macro(JVM_NewInstanceFromConstructor) \
4069 macro(JVM_InitializeFromArchive) \
4070 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4071 macro(JVM_LookupLambdaProxyClassFromArchive) \
4072 macro(JVM_GetRandomSeedForDumping) \
4073 macro(JVM_LogLambdaFormInvoker) \
4074 macro(JVM_LogDynamicProxy) \
4075 macro(JVM_DumpClassListToFile) \
4076 macro(JVM_DumpDynamicArchive) \
4077 macro(JVM_GetAllThreads) \
4078 macro(JVM_DumpThreads) \
4079 macro(JVM_GetManagement) \
4080 macro(JVM_InitAgentProperties) \
4081 macro(JVM_GetEnclosingMethodInfo) \
4082 macro(JVM_GetVmArguments) \
4083 macro(JVM_FindSignal) \
4084 macro(JVM_VirtualThreadStart) \
4085 macro(JVM_VirtualThreadEnd) \
4086 macro(JVM_VirtualThreadMount) \
4087 macro(JVM_VirtualThreadUnmount) \
4088 macro(JVM_GetClassFileVersion) \
4089 macro(JVM_EnsureMaterializedForStackWalk_func) \
4090 macro(JVM_PrintWarningAtDynamicAgentLoad)
4091
4092 #define INIT_COUNTER(name) \
4093 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4094 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4095
4096 void perf_jvm_init() {
4097 if (ProfileVMCalls && UsePerfData) {
4098 EXCEPTION_MARK;
4099
4100 DO_COUNTERS(INIT_COUNTER)
4101
4102 if (HAS_PENDING_EXCEPTION) {
4103 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4104 }
4105 }
4106 }
4107
4108 #undef INIT_COUNTER
4109
4110 #define PRINT_COUNTER(name) {\
4111 jlong count = _perf_##name##_count->get_value(); \
4112 if (count > 0) { \
4113 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
4114 #name, \
4115 _perf_##name##_timer->elapsed_counter_value_us(), \
4116 _perf_##name##_timer->thread_counter_value_us(), count); \
4117 }}
4118
4119 void perf_jvm_print_on(outputStream* st) {
4120 if (ProfileVMCalls && UsePerfData) {
4121 DO_COUNTERS(PRINT_COUNTER)
4122 } else {
4123 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4124 }
4125 }
4126
4127 #undef PRINT_COUNTER