1 /*
2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotClassInitializer.hpp"
26 #include "cds/aotConstantPoolResolver.hpp"
27 #include "cds/aotMetaspace.hpp"
28 #include "cds/cdsConfig.hpp"
29 #include "cds/classListParser.hpp"
30 #include "cds/classListWriter.hpp"
31 #include "cds/dynamicArchive.hpp"
32 #include "cds/heapShared.hpp"
33 #include "cds/lambdaFormInvokers.hpp"
34 #include "cds/lambdaProxyClassDictionary.hpp"
35 #include "classfile/classFileStream.hpp"
36 #include "classfile/classLoader.inline.hpp"
37 #include "classfile/classLoaderData.inline.hpp"
38 #include "classfile/classLoadInfo.hpp"
39 #include "classfile/javaAssertions.hpp"
40 #include "classfile/javaClasses.inline.hpp"
41 #include "classfile/moduleEntry.hpp"
42 #include "classfile/modules.hpp"
43 #include "classfile/packageEntry.hpp"
44 #include "classfile/stringTable.hpp"
45 #include "classfile/symbolTable.hpp"
46 #include "classfile/systemDictionary.hpp"
47 #include "classfile/vmClasses.hpp"
48 #include "classfile/vmSymbols.hpp"
49 #include "gc/shared/collectedHeap.inline.hpp"
50 #include "interpreter/bytecode.hpp"
51 #include "interpreter/bytecodeUtils.hpp"
52 #include "jfr/jfrEvents.hpp"
53 #include "jvm.h"
54 #include "logging/log.hpp"
55 #include "memory/oopFactory.hpp"
56 #include "memory/referenceType.hpp"
57 #include "memory/resourceArea.hpp"
58 #include "memory/universe.hpp"
59 #include "oops/access.inline.hpp"
60 #include "oops/constantPool.hpp"
61 #include "oops/fieldStreams.inline.hpp"
62 #include "oops/instanceKlass.hpp"
63 #include "oops/klass.inline.hpp"
64 #include "oops/method.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/recordComponent.hpp"
69 #include "prims/foreignGlobals.hpp"
70 #include "prims/jvm_misc.hpp"
71 #include "prims/jvmtiExport.hpp"
72 #include "prims/jvmtiThreadState.inline.hpp"
73 #include "prims/stackwalk.hpp"
74 #include "runtime/arguments.hpp"
75 #include "runtime/atomicAccess.hpp"
76 #include "runtime/continuation.hpp"
77 #include "runtime/deoptimization.hpp"
78 #include "runtime/globals_extension.hpp"
79 #include "runtime/handles.inline.hpp"
80 #include "runtime/handshake.hpp"
81 #include "runtime/init.hpp"
82 #include "runtime/interfaceSupport.inline.hpp"
83 #include "runtime/java.hpp"
84 #include "runtime/javaCalls.hpp"
85 #include "runtime/javaThread.hpp"
86 #include "runtime/jfieldIDWorkaround.hpp"
87 #include "runtime/jniHandles.inline.hpp"
88 #include "runtime/os.inline.hpp"
89 #include "runtime/osThread.hpp"
90 #include "runtime/perfData.inline.hpp"
91 #include "runtime/reflection.hpp"
92 #include "runtime/synchronizer.hpp"
93 #include "runtime/threadIdentifier.hpp"
94 #include "runtime/threadSMR.hpp"
95 #include "runtime/vframe.inline.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "runtime/vmOperations.hpp"
98 #include "services/attachListener.hpp"
99 #include "services/management.hpp"
100 #include "services/threadService.hpp"
101 #include "utilities/checkedCast.hpp"
102 #include "utilities/copy.hpp"
103 #include "utilities/defaultStream.hpp"
104 #include "utilities/dtrace.hpp"
105 #include "utilities/events.hpp"
106 #include "utilities/macros.hpp"
107 #include "utilities/utf8.hpp"
108 #include "utilities/zipLibrary.hpp"
109 #if INCLUDE_CDS
110 #include "classfile/systemDictionaryShared.hpp"
111 #endif
112 #if INCLUDE_JFR
113 #include "jfr/jfr.hpp"
114 #endif
115 #if INCLUDE_MANAGEMENT
116 #include "services/finalizerService.hpp"
117 #endif
118 #ifdef LINUX
119 #include "osContainer_linux.hpp"
120 #endif
121
122 #include <errno.h>
123
124 /*
125 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
126 such ctors and calls MUST NOT come between an oop declaration/init and its
127 usage because if objects are move this may cause various memory stomps, bus
128 errors and segfaults. Here is a cookbook for causing so called "naked oop
129 failures":
130
131 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
132 // Object address to be held directly in mirror & not visible to GC
133 oop mirror = JNIHandles::resolve_non_null(ofClass);
134
135 // If this ctor can hit a safepoint, moving objects around, then
136 ComplexConstructor foo;
137
138 // Boom! mirror may point to JUNK instead of the intended object
139 (some dereference of mirror)
140
141 // Here's another call that may block for GC, making mirror stale
142 MutexLocker ml(some_lock);
143
144 // And here's an initializer that can result in a stale oop
145 // all in one step.
146 oop o = call_that_can_throw_exception(TRAPS);
147
148
149 The solution is to keep the oop declaration BELOW the ctor or function
150 call that might cause a GC, do another resolve to reassign the oop, or
151 consider use of a Handle instead of an oop so there is immunity from object
152 motion. But note that the "QUICK" entries below do not have a handlemark
153 and thus can only support use of handles passed in.
154 */
155
156 extern void trace_class_resolution(Klass* to_class) {
157 ResourceMark rm;
158 int line_number = -1;
159 const char * source_file = nullptr;
160 const char * trace = "explicit";
161 InstanceKlass* caller = nullptr;
162 JavaThread* jthread = JavaThread::current();
163 if (jthread->has_last_Java_frame()) {
164 vframeStream vfst(jthread);
165
166 // Scan up the stack skipping ClassLoader frames.
167 Method* last_caller = nullptr;
168
169 while (!vfst.at_end()) {
170 Method* m = vfst.method();
171 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())) {
172 break;
173 }
174 last_caller = m;
175 vfst.next();
176 }
177 // if this is called from Class.forName0 and that is called from Class.forName,
178 // then print the caller of Class.forName. If this is Class.loadClass, then print
179 // that caller, otherwise keep quiet since this should be picked up elsewhere.
180 bool found_it = false;
181 if (!vfst.at_end() &&
182 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
183 vfst.method()->name() == vmSymbols::forName0_name()) {
184 vfst.next();
185 if (!vfst.at_end() &&
186 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
187 vfst.method()->name() == vmSymbols::forName_name()) {
188 vfst.next();
189 found_it = true;
190 }
191 } else if (last_caller != nullptr &&
192 last_caller->method_holder()->name() ==
193 vmSymbols::java_lang_ClassLoader() &&
194 last_caller->name() == vmSymbols::loadClass_name()) {
195 found_it = true;
196 } else if (!vfst.at_end()) {
197 if (vfst.method()->is_native()) {
198 // JNI call
199 found_it = true;
200 }
201 }
202 if (found_it && !vfst.at_end()) {
203 // found the caller
204 caller = vfst.method()->method_holder();
205 line_number = vfst.method()->line_number_from_bci(vfst.bci());
206 if (line_number == -1) {
207 // show method name if it's a native method
208 trace = vfst.method()->name_and_sig_as_C_string();
209 }
210 Symbol* s = caller->source_file_name();
211 if (s != nullptr) {
212 source_file = s->as_C_string();
213 }
214 }
215 }
216 if (caller != nullptr) {
217 if (to_class != caller) {
218 const char * from = caller->external_name();
219 const char * to = to_class->external_name();
220 // print in a single call to reduce interleaving between threads
221 if (source_file != nullptr) {
222 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
223 } else {
224 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
225 }
226 }
227 }
228 }
229
230 // java.lang.System //////////////////////////////////////////////////////////////////////
231
232
233 JVM_LEAF_PROF(jboolean, JVM_AOTIsTraining, JVM_AOTIsTraining(JNIEnv *env))
234 #if INCLUDE_CDS
235 return AOTMetaspace::is_recording_preimage_static_archive();
236 #else
237 return JNI_FALSE;
238 #endif // INCLUDE_CDS
239 JVM_END
240
241 JVM_ENTRY_PROF(jboolean, JVM_AOTEndTraining, JVM_AOTEndTraining(JNIEnv *env))
242 #if INCLUDE_CDS
243 if (AOTMetaspace::is_recording_preimage_static_archive()) {
244 AOTMetaspace::dump_static_archive(THREAD);
245 return JNI_TRUE;
246 }
247 return JNI_FALSE;
248 #else
249 return JNI_FALSE;
250 #endif // INCLUDE_CDS
251 JVM_END
252
253 JVM_ENTRY_PROF(jstring, JVM_AOTGetMode, JVM_AOTGetMode(JNIEnv *env))
254 HandleMark hm(THREAD);
255 #if INCLUDE_CDS
256 const char* mode = AOTMode == nullptr ? "auto" : AOTMode;
257 Handle h = java_lang_String::create_from_platform_dependent_str(mode, CHECK_NULL);
258 return (jstring) JNIHandles::make_local(THREAD, h());
259 #else
260 return nullptr;
261 #endif // INCLUDE_CDS
262 JVM_END
263
264 JVM_LEAF_PROF(jlong, JVM_AOTGetRecordingDuration, JVM_AOTGetRecordingDuration(JNIEnv *env))
265 #if INCLUDE_CDS
266 return AOTMetaspace::get_preimage_static_archive_recording_duration();
267 #else
268 return 0;
269 #endif // INCLUDE_CDS
270 JVM_END
271
272 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
273 return os::javaTimeMillis();
274 JVM_END
275
276 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
277 return os::javaTimeNanos();
278 JVM_END
279
280 // The function below is actually exposed by jdk.internal.misc.VM and not
281 // java.lang.System, but we choose to keep it here so that it stays next
282 // to JVM_CurrentTimeMillis and JVM_NanoTime
283
284 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
285 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
286
287 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
288 jlong seconds;
289 jlong nanos;
290
291 os::javaTimeSystemUTC(seconds, nanos);
292
293 // We're going to verify that the result can fit in a long.
294 // For that we need the difference in seconds between 'seconds'
295 // and 'offset_secs' to be such that:
296 // |seconds - offset_secs| < (2^63/10^9)
297 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
298 // which makes |seconds - offset_secs| < 2^33
299 // and we will prefer +/- 2^32 as the maximum acceptable diff
300 // as 2^32 has a more natural feel than 2^33...
301 //
302 // So if |seconds - offset_secs| >= 2^32 - we return a special
303 // sentinel value (-1) which the caller should take as an
304 // exception value indicating that the offset given to us is
305 // too far from range of the current time - leading to too big
306 // a nano adjustment. The caller is expected to recover by
307 // computing a more accurate offset and calling this method
308 // again. (For the record 2^32 secs is ~136 years, so that
309 // should rarely happen)
310 //
311 jlong diff = seconds - offset_secs;
312 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
313 return -1; // sentinel value: the offset is too far off the target
314 }
315
316 // return the adjustment. If you compute a time by adding
317 // this number of nanoseconds along with the number of seconds
318 // in the offset you should get the current UTC time.
319 return (diff * (jlong)1000000000) + nanos;
320 JVM_END
321
322 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
323 jobject dst, jint dst_pos, jint length))
324 // Check if we have null pointers
325 if (src == nullptr || dst == nullptr) {
326 THROW(vmSymbols::java_lang_NullPointerException());
327 }
328 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
329 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
330 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
331 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
332 // Do copy
333 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
334 JVM_END
335
336
337 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
338 JavaValue r(T_OBJECT);
339 // public synchronized Object put(Object key, Object value);
340 HandleMark hm(THREAD);
341 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
342 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
343 JavaCalls::call_virtual(&r,
344 props,
345 vmClasses::Properties_klass(),
346 vmSymbols::put_name(),
347 vmSymbols::object_object_object_signature(),
348 key_str,
349 value_str,
350 THREAD);
351 }
352
353
354 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
355
356 /*
357 * Return all of the system properties in a Java String array with alternating
358 * names and values from the jvm SystemProperty.
359 * Which includes some internal and all commandline -D defined properties.
360 */
361 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
362 ResourceMark rm(THREAD);
363 HandleMark hm(THREAD);
364 int ndx = 0;
365 int fixedCount = 2;
366
367 SystemProperty* p = Arguments::system_properties();
368 int count = Arguments::PropertyList_count(p);
369
370 // Allocate result String array
371 InstanceKlass* ik = vmClasses::String_klass();
372 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
373 objArrayHandle result_h(THREAD, r);
374
375 while (p != nullptr) {
376 const char * key = p->key();
377 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
378 const char * value = p->value();
379 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
380 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
381 result_h->obj_at_put(ndx * 2, key_str());
382 result_h->obj_at_put(ndx * 2 + 1, value_str());
383 ndx++;
384 }
385 p = p->next();
386 }
387
388 // Convert the -XX:MaxDirectMemorySize= command line flag
389 // to the sun.nio.MaxDirectMemorySize property.
390 // Do this after setting user properties to prevent people
391 // from setting the value with a -D option, as requested.
392 // Leave empty if not supplied
393 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
394 char as_chars[256];
395 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
396 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
397 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
398 result_h->obj_at_put(ndx * 2, key_str());
399 result_h->obj_at_put(ndx * 2 + 1, value_str());
400 ndx++;
401 }
402
403 // JVM monitoring and management support
404 // Add the sun.management.compiler property for the compiler's name
405 {
406 #undef CSIZE
407 #if defined(_LP64)
408 #define CSIZE "64-Bit "
409 #else
410 #define CSIZE
411 #endif // 64bit
412
413 #if COMPILER1_AND_COMPILER2
414 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
415 #else
416 #if defined(COMPILER1)
417 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
418 #elif defined(COMPILER2)
419 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
420 #elif INCLUDE_JVMCI
421 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
422 #else
423 const char* compiler_name = "";
424 #endif // compilers
425 #endif // COMPILER1_AND_COMPILER2
426
427 if (*compiler_name != '\0' &&
428 (Arguments::mode() != Arguments::_int)) {
429 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
430 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
431 result_h->obj_at_put(ndx * 2, key_str());
432 result_h->obj_at_put(ndx * 2 + 1, value_str());
433 ndx++;
434 }
435 }
436
437 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
438 JVM_END
439
440
441 /*
442 * Return the temporary directory that the VM uses for the attach
443 * and perf data files.
444 *
445 * It is important that this directory is well-known and the
446 * same for all VM instances. It cannot be affected by configuration
447 * variables such as java.io.tmpdir.
448 */
449 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
450 HandleMark hm(THREAD);
451 const char* temp_dir = os::get_temp_directory();
452 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
453 return (jstring) JNIHandles::make_local(THREAD, h());
454 JVM_END
455
456
457 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
458
459 extern volatile jint vm_created;
460
461 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
462 EventShutdown event;
463 if (event.should_commit()) {
464 event.set_reason("Shutdown requested from Java");
465 event.commit();
466 }
467 JVM_END
468
469
470 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
471 before_exit(thread, true);
472 vm_exit(code);
473 JVM_END
474
475
476 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
477 if (!DisableExplicitGC) {
478 EventSystemGC event;
479 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
480 Universe::heap()->collect(GCCause::_java_lang_system_gc);
481 event.commit();
482 }
483 JVM_END
484
485
486 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
487 return Universe::heap()->millis_since_last_whole_heap_examined();
488 JVM_END
489
490
491 static inline jlong convert_size_t_to_jlong(size_t val) {
492 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
493 NOT_LP64 (return (jlong)val;)
494 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
495 }
496
497 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
498 size_t n = Universe::heap()->capacity();
499 return convert_size_t_to_jlong(n);
500 JVM_END
501
502
503 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
504 size_t n = Universe::heap()->unused();
505 return convert_size_t_to_jlong(n);
506 JVM_END
507
508
509 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
510 size_t n = Universe::heap()->max_capacity();
511 return convert_size_t_to_jlong(n);
512 JVM_END
513
514
515 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
516 return os::active_processor_count();
517 JVM_END
518
519 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
520 #ifdef LINUX
521 if (UseContainerSupport) {
522 return JNI_TRUE;
523 }
524 #endif
525 return JNI_FALSE;
526 JVM_END
527
528 JVM_LEAF(jboolean, JVM_IsContainerized(void))
529 #ifdef LINUX
530 if (OSContainer::is_containerized()) {
531 return JNI_TRUE;
532 }
533 #endif
534 return JNI_FALSE;
535 JVM_END
536
537 // java.lang.Throwable //////////////////////////////////////////////////////
538
539 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
540 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
541 java_lang_Throwable::fill_in_stack_trace(exception);
542 JVM_END
543
544 // java.lang.NullPointerException ///////////////////////////////////////////
545
546 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
547 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
548
549 oop exc = JNIHandles::resolve_non_null(throwable);
550
551 Method* method;
552 int bci;
553 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
554 return nullptr;
555 }
556 if (method->is_native()) {
557 return nullptr;
558 }
559
560 stringStream ss;
561 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
562 if (ok) {
563 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
564 return (jstring) JNIHandles::make_local(THREAD, result);
565 } else {
566 return nullptr;
567 }
568 JVM_END
569
570 // java.lang.StackTraceElement //////////////////////////////////////////////
571
572
573 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
574 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
575 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
576 objArrayHandle stack_trace(THREAD, st);
577 // Fill in the allocated stack trace
578 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
579 JVM_END
580
581
582 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
583 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
584 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
585 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
586 JVM_END
587
588
589 // java.lang.StackWalker //////////////////////////////////////////////////////
590 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
591 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
592
593 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
594 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
595 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
596 if (!have_name) {
597 oop name = StringTable::intern(method->name(), CHECK);
598 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
599 }
600 if (!have_type) {
601 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
602 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
603 }
604 JVM_END
605
606 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
607 jint skip_frames, jobject contScope, jobject cont,
608 jint buffer_size, jint start_index, jobjectArray frames))
609 if (!thread->has_last_Java_frame()) {
610 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
611 }
612
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
615 Handle cont_h(THREAD, JNIHandles::resolve(cont));
616 // frames array is a ClassFrameInfo[] array when only getting caller reference,
617 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
618 // be null.
619 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
620 objArrayHandle frames_array_h(THREAD, fa);
621
622 if (frames_array_h->length() < buffer_size) {
623 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
624 }
625
626 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
627 buffer_size, start_index, frames_array_h, CHECK_NULL);
628 return JNIHandles::make_local(THREAD, result);
629 JVM_END
630
631
632 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
633 jint last_batch_count, jint buffer_size, jint start_index,
634 jobjectArray frames))
635 // frames array is a ClassFrameInfo[] array when only getting caller reference,
636 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
637 // be null.
638 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
639 objArrayHandle frames_array_h(THREAD, fa);
640
641 if (frames_array_h->length() < buffer_size) {
642 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
643 }
644
645 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
646 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
647 start_index, frames_array_h, THREAD);
648 JVM_END
649
650 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
651 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
652 objArrayHandle frames_array_h(THREAD, fa);
653 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
654 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
655
656 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
657 JVM_END
658
659 // java.lang.Object ///////////////////////////////////////////////
660
661
662 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
663 // as implemented in the classic virtual machine; return 0 if object is null
664 return handle == nullptr ? 0 :
665 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
666 JVM_END
667
668
669 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
670 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
671 ObjectSynchronizer::wait(obj, ms, CHECK);
672 JVM_END
673
674
675 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
676 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
677 ObjectSynchronizer::notify(obj, CHECK);
678 JVM_END
679
680
681 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
682 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
683 ObjectSynchronizer::notifyall(obj, CHECK);
684 JVM_END
685
686
687 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
688 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
689 Klass* klass = obj->klass();
690 JvmtiVMObjectAllocEventCollector oam;
691
692 #ifdef ASSERT
693 // Just checking that the cloneable flag is set correct
694 if (obj->is_array()) {
695 guarantee(klass->is_cloneable(), "all arrays are cloneable");
696 } else {
697 guarantee(obj->is_instance(), "should be instanceOop");
698 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
699 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
700 }
701 #endif
702
703 // Check if class of obj supports the Cloneable interface.
704 // All arrays are considered to be cloneable (See JLS 20.1.5).
705 // All j.l.r.Reference classes are considered non-cloneable.
706 if (!klass->is_cloneable() ||
707 (klass->is_instance_klass() &&
708 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
709 ResourceMark rm(THREAD);
710 THROW_MSG_NULL(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
711 }
712
713 // Make shallow object copy
714 const size_t size = obj->size();
715 oop new_obj_oop = nullptr;
716 if (obj->is_array()) {
717 const int length = ((arrayOop)obj())->length();
718 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
719 /* do_zero */ true, CHECK_NULL);
720 } else {
721 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
722 }
723
724 HeapAccess<>::clone(obj(), new_obj_oop, size);
725
726 Handle new_obj(THREAD, new_obj_oop);
727 // Caution: this involves a java upcall, so the clone should be
728 // "gc-robust" by this stage.
729 if (klass->has_finalizer()) {
730 assert(obj->is_instance(), "should be instanceOop");
731 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
732 new_obj = Handle(THREAD, new_obj_oop);
733 }
734
735 return JNIHandles::make_local(THREAD, new_obj());
736 JVM_END
737
738 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
739
740 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
741 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
742 JVM_END
743
744 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
745 return InstanceKlass::is_finalization_enabled();
746 JVM_END
747
748 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
749
750 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
751 CONT_RegisterNativeMethods(env, cls);
752 JVM_END
753
754 // java.io.File ///////////////////////////////////////////////////////////////
755
756 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
757 return os::native_path(path);
758 JVM_END
759
760
761 // Misc. class handling ///////////////////////////////////////////////////////////
762
763
764 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
765 // Getting the class of the caller frame.
766 //
767 // The call stack at this point looks something like this:
768 //
769 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
770 // [1] [ @CallerSensitive API.method ]
771 // [.] [ (skipped intermediate frames) ]
772 // [n] [ caller ]
773 vframeStream vfst(thread);
774 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
775 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
776 Method* m = vfst.method();
777 assert(m != nullptr, "sanity");
778 switch (n) {
779 case 0:
780 // This must only be called from Reflection.getCallerClass
781 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
782 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
783 }
784 // fall-through
785 case 1:
786 // Frame 0 and 1 must be caller sensitive.
787 if (!m->caller_sensitive()) {
788 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
789 }
790 break;
791 default:
792 if (!m->is_ignored_by_security_stack_walk()) {
793 // We have reached the desired frame; return the holder class.
794 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
795 }
796 break;
797 }
798 }
799 return nullptr;
800 JVM_END
801
802
803 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
804 oop mirror = nullptr;
805 BasicType t = name2type(utf);
806 if (t != T_ILLEGAL && !is_reference_type(t)) {
807 mirror = Universe::java_mirror(t);
808 }
809 if (mirror == nullptr) {
810 THROW_MSG_NULL(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
811 } else {
812 return (jclass) JNIHandles::make_local(THREAD, mirror);
813 }
814 JVM_END
815
816
817 // Returns a class loaded by the bootstrap class loader; or null
818 // if not found. ClassNotFoundException is not thrown.
819 // FindClassFromBootLoader is exported to the launcher for windows.
820 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
821 // Java libraries should ensure that name is never null or illegal.
822 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
823 // It's impossible to create this class; the name cannot fit
824 // into the constant pool.
825 return nullptr;
826 }
827 assert(UTF8::is_legal_utf8((const unsigned char*)name, strlen(name), false), "illegal UTF name");
828
829 TempNewSymbol h_name = SymbolTable::new_symbol(name);
830 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
831 if (k == nullptr) {
832 return nullptr;
833 }
834
835 if (log_is_enabled(Debug, class, resolve)) {
836 trace_class_resolution(k);
837 }
838 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
839 JVM_END
840
841 // Find a class with this name in this loader, using the caller's protection domain.
842 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
843 jboolean init, jobject loader,
844 jclass caller))
845 TempNewSymbol h_name =
846 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
847 CHECK_NULL);
848
849 oop loader_oop = JNIHandles::resolve(loader);
850 oop from_class = JNIHandles::resolve(caller);
851 Handle h_loader(THREAD, loader_oop);
852
853 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
854 false, THREAD);
855
856 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
857 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
858 }
859 return result;
860 JVM_END
861
862 // Currently only called from the old verifier.
863 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
864 jboolean init, jclass from))
865 TempNewSymbol h_name =
866 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
867 CHECK_NULL);
868 oop from_class_oop = JNIHandles::resolve(from);
869 Klass* from_class = (from_class_oop == nullptr)
870 ? (Klass*)nullptr
871 : java_lang_Class::as_Klass(from_class_oop);
872 oop class_loader = nullptr;
873 if (from_class != nullptr) {
874 class_loader = from_class->class_loader();
875 }
876 Handle h_loader(THREAD, class_loader);
877 jclass result = find_class_from_class_loader(env, h_name, init, h_loader, true, thread);
878
879 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
880 // this function is generally only used for class loading during verification.
881 ResourceMark rm;
882 const char* from_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(from))->external_name();
883 const char* to_name = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result))->external_name();
884 log_debug(class, resolve)("%s %s (verification)", from_name, to_name);
885 }
886
887 #if INCLUDE_CDS
888 if (CDSConfig::is_preserving_verification_constraints() && from_class->is_instance_klass()) {
889 InstanceKlass* ik = InstanceKlass::cast(from_class);
890 SystemDictionaryShared::add_old_verification_constraint(THREAD, ik, h_name);
891 }
892 #endif
893
894 return result;
895 JVM_END
896
897 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
898 static jclass jvm_define_class_common(const char *name,
899 jobject loader, const jbyte *buf,
900 jsize len, jobject pd, const char *source,
901 TRAPS) {
902 if (source == nullptr) source = "__JVM_DefineClass__";
903
904 JavaThread* jt = THREAD;
905
906 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
907 ClassLoader::perf_define_appclass_selftime(),
908 ClassLoader::perf_define_appclasses(),
909 jt->get_thread_stat()->perf_recursion_counts_addr(),
910 jt->get_thread_stat()->perf_timers_addr(),
911 PerfClassTraceTime::DEFINE_CLASS);
912
913 if (UsePerfData) {
914 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
915 }
916
917 // Class resolution will get the class name from the .class stream if the name is null.
918 TempNewSymbol class_name = name == nullptr ? nullptr :
919 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
920 CHECK_NULL);
921
922 ResourceMark rm(THREAD);
923 ClassFileStream st((u1*)buf, len, source);
924 Handle class_loader (THREAD, JNIHandles::resolve(loader));
925 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
926 ClassLoadInfo cl_info(protection_domain);
927 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
928 class_loader,
929 cl_info,
930 CHECK_NULL);
931
932 if (log_is_enabled(Debug, class, resolve)) {
933 trace_class_resolution(k);
934 }
935
936 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
937 }
938
939 enum {
940 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
941 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
942 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
943 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
944 };
945
946 /*
947 * Define a class with the specified flags that indicates if it's a nestmate,
948 * hidden, or strongly referenced from class loader.
949 */
950 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
951 const jbyte *buf, jsize len, jobject pd,
952 jboolean init, int flags, jobject classData, TRAPS) {
953 ResourceMark rm(THREAD);
954
955 InstanceKlass* lookup_k = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(lookup));
956 // Lookup class must not be a primitive class (whose mirror has a null Klass*)
957 if (lookup_k == nullptr) {
958 // The error message is wrong. We come here only if lookup is a primitive class
959 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
960 }
961
962 Handle class_loader (THREAD, lookup_k->class_loader());
963
964 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
965 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
966 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
967 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
968
969 InstanceKlass* host_class = nullptr;
970 if (is_nestmate) {
971 host_class = lookup_k->nest_host(CHECK_NULL);
972 }
973
974 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
975 name,
976 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
977 is_nestmate ? host_class->external_name() : "",
978 is_hidden ? "hidden" : "not hidden",
979 is_strong ? "strong" : "weak",
980 vm_annotations ? "with vm annotations" : "without vm annotation");
981
982 if (!is_hidden) {
983 // classData is only applicable for hidden classes
984 if (classData != nullptr) {
985 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
986 }
987 if (is_nestmate) {
988 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
989 }
990 if (!is_strong) {
991 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
992 }
993 if (vm_annotations) {
994 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
995 }
996 if (flags != STRONG_LOADER_LINK) {
997 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
998 err_msg("invalid flag 0x%x", flags));
999 }
1000 }
1001
1002 // Class resolution will get the class name from the .class stream if the name is null.
1003 TempNewSymbol class_name = name == nullptr ? nullptr :
1004 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
1005 CHECK_NULL);
1006
1007 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1008 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
1009 ClassFileStream st((u1*)buf, len, source);
1010
1011 InstanceKlass* ik = nullptr;
1012 if (!is_hidden) {
1013 ClassLoadInfo cl_info(protection_domain);
1014 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1015 class_loader,
1016 cl_info,
1017 CHECK_NULL);
1018
1019 if (log_is_enabled(Debug, class, resolve)) {
1020 trace_class_resolution(ik);
1021 }
1022 } else { // hidden
1023 Handle classData_h(THREAD, JNIHandles::resolve(classData));
1024 ClassLoadInfo cl_info(protection_domain,
1025 host_class,
1026 classData_h,
1027 is_hidden,
1028 is_strong,
1029 vm_annotations);
1030 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1031 class_loader,
1032 cl_info,
1033 CHECK_NULL);
1034
1035 // The hidden class loader data has been artificially been kept alive to
1036 // this point. The mirror and any instances of this class have to keep
1037 // it alive afterwards.
1038 ik->class_loader_data()->dec_keep_alive_ref_count();
1039
1040 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1041 ModuleEntry* module = ik->module();
1042 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1043 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1044 module_name,
1045 ik->external_name(),
1046 host_class->external_name(),
1047 ik->is_hidden() ? "is hidden" : "is not hidden");
1048 }
1049 }
1050
1051 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1052 // non-hidden class or nestmate class must be in the same package as the Lookup class
1053 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1054 }
1055
1056 if (init) {
1057 ik->initialize(CHECK_NULL);
1058 } else {
1059 ik->link_class(CHECK_NULL);
1060 }
1061
1062 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1063 }
1064
1065 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1066 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1067 JVM_END
1068
1069 /*
1070 * Define a class with the specified lookup class.
1071 * lookup: Lookup class
1072 * name: the name of the class
1073 * buf: class bytes
1074 * len: length of class bytes
1075 * pd: protection domain
1076 * init: initialize the class
1077 * flags: properties of the class
1078 * classData: private static pre-initialized field
1079 */
1080 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1081 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1082
1083 if (lookup == nullptr) {
1084 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1085 }
1086
1087 assert(buf != nullptr, "buf must not be null");
1088
1089 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1090 JVM_END
1091
1092 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))
1093 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1094 JVM_END
1095
1096 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1097 ResourceMark rm(THREAD);
1098
1099 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1100 char* str = java_lang_String::as_utf8_string(h_name());
1101
1102 // Sanity check, don't expect null
1103 if (str == nullptr) return nullptr;
1104
1105 // Internalize the string, converting '.' to '/' in string.
1106 char* p = (char*)str;
1107 while (*p != '\0') {
1108 if (*p == '.') {
1109 *p = '/';
1110 }
1111 p++;
1112 }
1113
1114 const int str_len = (int)(p - str);
1115 if (str_len > Symbol::max_length()) {
1116 // It's impossible to create this class; the name cannot fit
1117 // into the constant pool.
1118 return nullptr;
1119 }
1120 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1121
1122 // Security Note:
1123 // The Java level wrapper will perform the necessary security check allowing
1124 // us to pass the null as the initiating class loader.
1125 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1126 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name, h_loader);
1127 #if INCLUDE_CDS
1128 if (k == nullptr) {
1129 // If the class is not already loaded, try to see if it's in the shared
1130 // archive for the current classloader (h_loader).
1131 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1132 }
1133 #endif
1134 return (k == nullptr) ? nullptr :
1135 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1136 JVM_END
1137
1138 // Module support //////////////////////////////////////////////////////////////////////////////
1139
1140 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1141 jstring location, jobjectArray packages))
1142 Handle h_module (THREAD, JNIHandles::resolve(module));
1143 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1144 JVM_END
1145
1146 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1147 Handle h_module (THREAD, JNIHandles::resolve(module));
1148 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1149 JVM_END
1150
1151 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1152 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1153 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1154 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1155 JVM_END
1156
1157 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1158 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1159 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1160 JVM_END
1161
1162 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1163 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1164 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1165 JVM_END
1166
1167 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1168 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1169 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1170 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1171 JVM_END
1172
1173 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1174 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1175 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1176 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1177 JVM_END
1178
1179 // Reflection support //////////////////////////////////////////////////////////////////////////////
1180
1181 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1182 assert (cls != nullptr, "illegal class");
1183 JvmtiVMObjectAllocEventCollector oam;
1184 ResourceMark rm(THREAD);
1185 HandleMark hm(THREAD);
1186 Handle java_class(THREAD, JNIHandles::resolve(cls));
1187 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1188 return (jstring) JNIHandles::make_local(THREAD, result);
1189 JVM_END
1190
1191
1192 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1193 JvmtiVMObjectAllocEventCollector oam;
1194 oop mirror = JNIHandles::resolve_non_null(cls);
1195
1196 // Special handling for primitive objects
1197 if (java_lang_Class::is_primitive(mirror)) {
1198 // Primitive objects does not have any interfaces
1199 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1200 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1201 }
1202
1203 Klass* klass = java_lang_Class::as_Klass(mirror);
1204 // Figure size of result array
1205 int size;
1206 if (klass->is_instance_klass()) {
1207 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1208 } else {
1209 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1210 size = 2;
1211 }
1212
1213 // Allocate result array
1214 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1215 objArrayHandle result (THREAD, r);
1216 // Fill in result
1217 if (klass->is_instance_klass()) {
1218 // Regular instance klass, fill in all local interfaces
1219 for (int index = 0; index < size; index++) {
1220 InstanceKlass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1221 result->obj_at_put(index, k->java_mirror());
1222 }
1223 } else {
1224 // All arrays implement java.lang.Cloneable and java.io.Serializable
1225 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1226 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1227 }
1228 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1229 JVM_END
1230
1231
1232 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1233 oop mirror = JNIHandles::resolve_non_null(cls);
1234 if (java_lang_Class::is_primitive(mirror)) {
1235 return JNI_FALSE;
1236 }
1237 Klass* k = java_lang_Class::as_Klass(mirror);
1238 return k->is_hidden();
1239 JVM_END
1240
1241 class ScopedValueBindingsResolver {
1242 public:
1243 InstanceKlass* Carrier_klass;
1244 ScopedValueBindingsResolver(JavaThread* THREAD) {
1245 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1246 Carrier_klass = InstanceKlass::cast(k);
1247 }
1248 };
1249
1250 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1251 ResourceMark rm(THREAD);
1252 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1253 JvmtiVMObjectAllocEventCollector oam;
1254
1255 static ScopedValueBindingsResolver resolver(THREAD);
1256
1257 // Iterate through Java frames
1258 vframeStream vfst(thread);
1259 for(; !vfst.at_end(); vfst.next()) {
1260 int loc = -1;
1261 // get method of frame
1262 Method* method = vfst.method();
1263
1264 Symbol *name = method->name();
1265
1266 InstanceKlass* holder = method->method_holder();
1267 if (name == vmSymbols::runWith_method_name()) {
1268 if (holder == vmClasses::Thread_klass()
1269 || holder == resolver.Carrier_klass) {
1270 loc = 1;
1271 }
1272 }
1273
1274 if (loc != -1) {
1275 javaVFrame *frame = vfst.asJavaVFrame();
1276 StackValueCollection* locals = frame->locals();
1277 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1278 Handle result = head_sv->get_obj();
1279 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1280 if (result() != nullptr) {
1281 return JNIHandles::make_local(THREAD, result());
1282 }
1283 }
1284 }
1285
1286 return nullptr;
1287 JVM_END
1288
1289
1290 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1291 JvmtiVMObjectAllocEventCollector oam;
1292 // ofClass is a reference to a java_lang_Class object. The mirror object
1293 // of an InstanceKlass
1294 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1295 if (java_lang_Class::is_primitive(ofMirror) ||
1296 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1297 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1298 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1299 }
1300
1301 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1302 InnerClassesIterator iter(k);
1303
1304 if (iter.length() == 0) {
1305 // Neither an inner nor outer class
1306 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1307 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1308 }
1309
1310 // find inner class info
1311 constantPoolHandle cp(thread, k->constants());
1312 int length = iter.length();
1313
1314 // Allocate temp. result array
1315 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1316 objArrayHandle result (THREAD, r);
1317 int members = 0;
1318
1319 for (; !iter.done(); iter.next()) {
1320 int ioff = iter.inner_class_info_index();
1321 int ooff = iter.outer_class_info_index();
1322
1323 if (ioff != 0 && ooff != 0) {
1324 // Check to see if the name matches the class we're looking for
1325 // before attempting to find the class.
1326 if (cp->klass_name_at_matches(k, ooff)) {
1327 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1328 if (outer_klass == k) {
1329 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1330 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1331
1332 // Throws an exception if outer klass has not declared k as
1333 // an inner klass
1334 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1335
1336 result->obj_at_put(members, inner_klass->java_mirror());
1337 members++;
1338 }
1339 }
1340 }
1341 }
1342
1343 if (members != length) {
1344 // Return array of right length
1345 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1346 for(int i = 0; i < members; i++) {
1347 res->obj_at_put(i, result->obj_at(i));
1348 }
1349 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1350 }
1351
1352 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1353 JVM_END
1354
1355
1356 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1357 {
1358 // ofClass is a reference to a java_lang_Class object.
1359 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1360 if (java_lang_Class::is_primitive(ofMirror)) {
1361 return nullptr;
1362 }
1363 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1364 if (!klass->is_instance_klass()) {
1365 return nullptr;
1366 }
1367
1368 bool inner_is_member = false;
1369 Klass* outer_klass
1370 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1371 if (outer_klass == nullptr) return nullptr; // already a top-level class
1372 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1373 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1374 }
1375 JVM_END
1376
1377 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1378 {
1379 oop mirror = JNIHandles::resolve_non_null(cls);
1380 if (java_lang_Class::is_primitive(mirror)) {
1381 return nullptr;
1382 }
1383 Klass* klass = java_lang_Class::as_Klass(mirror);
1384 if (!klass->is_instance_klass()) {
1385 return nullptr;
1386 }
1387 InstanceKlass* k = InstanceKlass::cast(klass);
1388 int ooff = 0, noff = 0;
1389 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1390 if (noff != 0) {
1391 constantPoolHandle i_cp(thread, k->constants());
1392 Symbol* name = i_cp->symbol_at(noff);
1393 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1394 return (jstring) JNIHandles::make_local(THREAD, str());
1395 }
1396 }
1397 return nullptr;
1398 }
1399 JVM_END
1400
1401 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1402 assert (cls != nullptr, "illegal class");
1403 JvmtiVMObjectAllocEventCollector oam;
1404 ResourceMark rm(THREAD);
1405 oop mirror = JNIHandles::resolve_non_null(cls);
1406 // Return null for arrays and primitives
1407 if (!java_lang_Class::is_primitive(mirror)) {
1408 Klass* k = java_lang_Class::as_Klass(mirror);
1409 if (k->is_instance_klass()) {
1410 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1411 if (sym == nullptr) return nullptr;
1412 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1413 return (jstring) JNIHandles::make_local(THREAD, str());
1414 }
1415 }
1416 return nullptr;
1417 JVM_END
1418
1419
1420 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1421 assert (cls != nullptr, "illegal class");
1422 oop mirror = JNIHandles::resolve_non_null(cls);
1423 // Return null for arrays and primitives
1424 if (!java_lang_Class::is_primitive(mirror)) {
1425 Klass* k = java_lang_Class::as_Klass(mirror);
1426 if (k->is_instance_klass()) {
1427 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1428 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1429 }
1430 }
1431 return nullptr;
1432 JVM_END
1433
1434
1435 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1436 // some of this code was adapted from from jni_FromReflectedField
1437
1438 oop reflected = JNIHandles::resolve_non_null(field);
1439 oop mirror = java_lang_reflect_Field::clazz(reflected);
1440 int slot = java_lang_reflect_Field::slot(reflected);
1441 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1442
1443 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1444 int offset = ik->field_offset(slot);
1445
1446 if (modifiers & JVM_ACC_STATIC) {
1447 // for static fields we only look in the current class
1448 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1449 assert(false, "cannot find static field");
1450 return false;
1451 }
1452 } else {
1453 // for instance fields we start with the current class and work
1454 // our way up through the superclass chain
1455 if (!ik->find_field_from_offset(offset, false, &fd)) {
1456 assert(false, "cannot find instance field");
1457 return false;
1458 }
1459 }
1460 return true;
1461 }
1462
1463 static Method* jvm_get_method_common(jobject method) {
1464 // some of this code was adapted from from jni_FromReflectedMethod
1465
1466 oop reflected = JNIHandles::resolve_non_null(method);
1467 oop mirror = nullptr;
1468 int slot = 0;
1469
1470 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1471 mirror = java_lang_reflect_Constructor::clazz(reflected);
1472 slot = java_lang_reflect_Constructor::slot(reflected);
1473 } else {
1474 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1475 "wrong type");
1476 mirror = java_lang_reflect_Method::clazz(reflected);
1477 slot = java_lang_reflect_Method::slot(reflected);
1478 }
1479 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1480
1481 Method* m = ik->method_with_idnum(slot);
1482 assert(m != nullptr, "cannot find method");
1483 return m; // caller has to deal with null in product mode
1484 }
1485
1486 /* Type use annotations support (JDK 1.8) */
1487
1488 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1489 assert (cls != nullptr, "illegal class");
1490 ResourceMark rm(THREAD);
1491 // Return null for arrays and primitives
1492 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1493 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1494 if (k->is_instance_klass()) {
1495 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1496 if (type_annotations != nullptr) {
1497 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1498 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1499 }
1500 }
1501 }
1502 return nullptr;
1503 JVM_END
1504
1505 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1506 assert (method != nullptr, "illegal method");
1507 // method is a handle to a java.lang.reflect.Method object
1508 Method* m = jvm_get_method_common(method);
1509 if (m == nullptr) {
1510 return nullptr;
1511 }
1512
1513 AnnotationArray* type_annotations = m->type_annotations();
1514 if (type_annotations != nullptr) {
1515 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1516 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1517 }
1518
1519 return nullptr;
1520 JVM_END
1521
1522 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1523 assert (field != nullptr, "illegal field");
1524 fieldDescriptor fd;
1525 bool gotFd = jvm_get_field_common(field, fd);
1526 if (!gotFd) {
1527 return nullptr;
1528 }
1529
1530 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1531 JVM_END
1532
1533 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1534 if (!cp->is_within_bounds(index)) {
1535 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1536 }
1537 }
1538
1539 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1540 {
1541 // method is a handle to a java.lang.reflect.Method object
1542 Method* method_ptr = jvm_get_method_common(method);
1543 methodHandle mh (THREAD, method_ptr);
1544 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1545 const int num_params = mh->method_parameters_length();
1546
1547 if (num_params < 0) {
1548 // A -1 return value from method_parameters_length means there is no
1549 // parameter data. Return null to indicate this to the reflection
1550 // API.
1551 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1552 return (jobjectArray)nullptr;
1553 } else {
1554 // Otherwise, we return something up to reflection, even if it is
1555 // a zero-length array. Why? Because in some cases this can
1556 // trigger a MalformedParametersException.
1557
1558 // make sure all the symbols are properly formatted
1559 for (int i = 0; i < num_params; i++) {
1560 MethodParametersElement* params = mh->method_parameters_start();
1561 int index = params[i].name_cp_index;
1562 constantPoolHandle cp(THREAD, mh->constants());
1563 bounds_check(cp, index, CHECK_NULL);
1564
1565 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1566 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
1567 "Wrong type at constant pool index");
1568 }
1569
1570 }
1571
1572 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1573 objArrayHandle result (THREAD, result_oop);
1574
1575 for (int i = 0; i < num_params; i++) {
1576 MethodParametersElement* params = mh->method_parameters_start();
1577 // For a 0 index, give a null symbol
1578 Symbol* sym = 0 != params[i].name_cp_index ?
1579 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1580 int flags = params[i].flags;
1581 oop param = Reflection::new_parameter(reflected_method, i, sym,
1582 flags, CHECK_NULL);
1583 result->obj_at_put(i, param);
1584 }
1585 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1586 }
1587 }
1588 JVM_END
1589
1590 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1591
1592 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1593 {
1594 JvmtiVMObjectAllocEventCollector oam;
1595
1596 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1597 // Exclude primitive types and array types
1598 if (java_lang_Class::is_primitive(ofMirror) ||
1599 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1600 // Return empty array
1601 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1602 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1603 }
1604
1605 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1606 constantPoolHandle cp(THREAD, k->constants());
1607
1608 // Ensure class is linked
1609 k->link_class(CHECK_NULL);
1610
1611 // Allocate result
1612 int num_fields;
1613
1614 if (publicOnly) {
1615 num_fields = 0;
1616 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1617 if (fs.access_flags().is_public()) ++num_fields;
1618 }
1619 } else {
1620 num_fields = k->java_fields_count();
1621 }
1622
1623 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1624 objArrayHandle result (THREAD, r);
1625
1626 int out_idx = 0;
1627 fieldDescriptor fd;
1628 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1629 if (!publicOnly || fs.access_flags().is_public()) {
1630 fd.reinitialize(k, fs.to_FieldInfo());
1631 oop field = Reflection::new_field(&fd, CHECK_NULL);
1632 result->obj_at_put(out_idx, field);
1633 ++out_idx;
1634 }
1635 }
1636 assert(out_idx == num_fields, "just checking");
1637 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1638 }
1639 JVM_END
1640
1641 // A class is a record if and only if it is final and a direct subclass of
1642 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1643 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1644 {
1645 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1646 if (k != nullptr && k->is_instance_klass()) {
1647 InstanceKlass* ik = InstanceKlass::cast(k);
1648 return ik->is_record();
1649 } else {
1650 return false;
1651 }
1652 }
1653 JVM_END
1654
1655 // Returns an array containing the components of the Record attribute,
1656 // or null if the attribute is not present.
1657 //
1658 // Note that this function returns the components of the Record attribute
1659 // even if the class is not a record.
1660 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1661 {
1662 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(ofClass));
1663
1664 Array<RecordComponent*>* components = ik->record_components();
1665 if (components != nullptr) {
1666 JvmtiVMObjectAllocEventCollector oam;
1667 constantPoolHandle cp(THREAD, ik->constants());
1668 int length = components->length();
1669 assert(length >= 0, "unexpected record_components length");
1670 objArrayOop record_components =
1671 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1672 objArrayHandle components_h (THREAD, record_components);
1673
1674 for (int x = 0; x < length; x++) {
1675 RecordComponent* component = components->at(x);
1676 assert(component != nullptr, "unexpected null record component");
1677 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1678 components_h->obj_at_put(x, component_oop);
1679 }
1680 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1681 }
1682
1683 return nullptr;
1684 }
1685 JVM_END
1686
1687 static jobjectArray get_class_declared_methods_helper(
1688 JNIEnv *env,
1689 jclass ofClass, jboolean publicOnly,
1690 bool want_constructor,
1691 Klass* klass, TRAPS) {
1692
1693 JvmtiVMObjectAllocEventCollector oam;
1694
1695 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1696 // Exclude primitive types and array types
1697 if (java_lang_Class::is_primitive(ofMirror)
1698 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1699 // Return empty array
1700 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1701 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1702 }
1703
1704 InstanceKlass* k = java_lang_Class::as_InstanceKlass(ofMirror);
1705
1706 // Ensure class is linked
1707 k->link_class(CHECK_NULL);
1708
1709 Array<Method*>* methods = k->methods();
1710 int methods_length = methods->length();
1711
1712 // Save original method_idnum in case of redefinition, which can change
1713 // the idnum of obsolete methods. The new method will have the same idnum
1714 // but if we refresh the methods array, the counts will be wrong.
1715 ResourceMark rm(THREAD);
1716 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1717 int num_methods = 0;
1718
1719 // Select methods matching the criteria.
1720 for (int i = 0; i < methods_length; i++) {
1721 Method* method = methods->at(i);
1722 if (want_constructor && !method->is_object_initializer()) {
1723 continue;
1724 }
1725 if (!want_constructor &&
1726 (method->is_object_initializer() || method->is_static_initializer() ||
1727 method->is_overpass())) {
1728 continue;
1729 }
1730 if (publicOnly && !method->is_public()) {
1731 continue;
1732 }
1733 idnums->push(method->method_idnum());
1734 ++num_methods;
1735 }
1736
1737 // Allocate result
1738 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1739 objArrayHandle result (THREAD, r);
1740
1741 // Now just put the methods that we selected above, but go by their idnum
1742 // in case of redefinition. The methods can be redefined at any safepoint,
1743 // so above when allocating the oop array and below when creating reflect
1744 // objects.
1745 for (int i = 0; i < num_methods; i++) {
1746 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1747 if (method.is_null()) {
1748 // Method may have been deleted and seems this API can handle null
1749 // Otherwise should probably put a method that throws NSME
1750 result->obj_at_put(i, nullptr);
1751 } else {
1752 oop m;
1753 if (want_constructor) {
1754 m = Reflection::new_constructor(method, CHECK_NULL);
1755 } else {
1756 m = Reflection::new_method(method, false, CHECK_NULL);
1757 }
1758 result->obj_at_put(i, m);
1759 }
1760 }
1761
1762 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1763 }
1764
1765 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1766 {
1767 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1768 /*want_constructor*/ false,
1769 vmClasses::reflect_Method_klass(), THREAD);
1770 }
1771 JVM_END
1772
1773 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1774 {
1775 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1776 /*want_constructor*/ true,
1777 vmClasses::reflect_Constructor_klass(), THREAD);
1778 }
1779 JVM_END
1780
1781 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1782 {
1783 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1784 InstanceKlass* m = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(member));
1785 return c->has_nestmate_access_to(m, THREAD);
1786 }
1787 JVM_END
1788
1789 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1790 {
1791 // current is not a primitive or array class
1792 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1793 InstanceKlass* host = c->nest_host(THREAD);
1794 return (jclass) (host == nullptr ? nullptr :
1795 JNIHandles::make_local(THREAD, host->java_mirror()));
1796 }
1797 JVM_END
1798
1799 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1800 {
1801 // current is not a primitive or array class
1802 ResourceMark rm(THREAD);
1803 InstanceKlass* c = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(current));
1804 InstanceKlass* host = c->nest_host(THREAD);
1805
1806 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
1807 c->external_name(), host->external_name());
1808 {
1809 JvmtiVMObjectAllocEventCollector oam;
1810 Array<u2>* members = host->nest_members();
1811 int length = members == nullptr ? 0 : members->length();
1812
1813 log_trace(class, nestmates)(" - host has %d listed nest members", length);
1814
1815 // nest host is first in the array so make it one bigger
1816 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1817 length + 1, CHECK_NULL);
1818 objArrayHandle result(THREAD, r);
1819 result->obj_at_put(0, host->java_mirror());
1820 if (length != 0) {
1821 int count = 0;
1822 for (int i = 0; i < length; i++) {
1823 int cp_index = members->at(i);
1824 Klass* k = host->constants()->klass_at(cp_index, THREAD);
1825 if (HAS_PENDING_EXCEPTION) {
1826 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1827 return nullptr; // propagate VMEs
1828 }
1829 if (log_is_enabled(Trace, class, nestmates)) {
1830 stringStream ss;
1831 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
1832 ss.print(" - resolution of nest member %s failed: ", target_member_class);
1833 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1834 log_trace(class, nestmates)("%s", ss.as_string());
1835 }
1836 CLEAR_PENDING_EXCEPTION;
1837 continue;
1838 }
1839 if (k->is_instance_klass()) {
1840 InstanceKlass* ik = InstanceKlass::cast(k);
1841 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
1842 if (nest_host_k == host) {
1843 result->obj_at_put(count+1, k->java_mirror());
1844 count++;
1845 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
1846 } else {
1847 log_trace(class, nestmates)(" - skipping member %s with different host %s",
1848 ik->external_name(), nest_host_k->external_name());
1849 }
1850 } else {
1851 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
1852 k->external_name());
1853 }
1854 }
1855 if (count < length) {
1856 // we had invalid entries so we need to compact the array
1857 log_trace(class, nestmates)(" - compacting array from length %d to %d",
1858 length + 1, count + 1);
1859
1860 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1861 count + 1, CHECK_NULL);
1862 objArrayHandle result2(THREAD, r2);
1863 for (int i = 0; i < count + 1; i++) {
1864 result2->obj_at_put(i, result->obj_at(i));
1865 }
1866 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1867 }
1868 }
1869 else {
1870 assert(host == c || c->is_hidden(), "must be singleton nest or dynamic nestmate");
1871 }
1872 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1873 }
1874 }
1875 JVM_END
1876
1877 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
1878 {
1879 oop mirror = JNIHandles::resolve_non_null(current);
1880 assert(!java_lang_Class::is_primitive(mirror), "should not be");
1881 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
1882
1883 ResourceMark rm(THREAD);
1884 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
1885 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
1886 if (ik->is_sealed()) {
1887 JvmtiVMObjectAllocEventCollector oam;
1888 Array<u2>* subclasses = ik->permitted_subclasses();
1889 int length = subclasses->length();
1890
1891 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
1892
1893 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
1894 length, CHECK_NULL);
1895 objArrayHandle result(THREAD, r);
1896 int count = 0;
1897 for (int i = 0; i < length; i++) {
1898 int cp_index = subclasses->at(i);
1899 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
1900 if (HAS_PENDING_EXCEPTION) {
1901 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
1902 return nullptr; // propagate VMEs
1903 }
1904 if (log_is_enabled(Trace, class, sealed)) {
1905 stringStream ss;
1906 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
1907 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
1908 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
1909 log_trace(class, sealed)("%s", ss.as_string());
1910 }
1911
1912 CLEAR_PENDING_EXCEPTION;
1913 continue;
1914 }
1915 if (k->is_instance_klass()) {
1916 result->obj_at_put(count++, k->java_mirror());
1917 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
1918 }
1919 }
1920 if (count < length) {
1921 // we had invalid entries so we need to compact the array
1922 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
1923 count, CHECK_NULL);
1924 objArrayHandle result2(THREAD, r2);
1925 for (int i = 0; i < count; i++) {
1926 result2->obj_at_put(i, result->obj_at(i));
1927 }
1928 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
1929 }
1930 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1931 } else {
1932 return nullptr;
1933 }
1934 }
1935 JVM_END
1936
1937 // Constant pool access //////////////////////////////////////////////////////////
1938
1939 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1940 {
1941 JvmtiVMObjectAllocEventCollector oam;
1942 oop mirror = JNIHandles::resolve_non_null(cls);
1943 // Return null for primitives and arrays
1944 if (!java_lang_Class::is_primitive(mirror)) {
1945 Klass* k = java_lang_Class::as_Klass(mirror);
1946 if (k->is_instance_klass()) {
1947 InstanceKlass* k_h = InstanceKlass::cast(k);
1948 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1949 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1950 return JNIHandles::make_local(THREAD, jcp());
1951 }
1952 }
1953 return nullptr;
1954 }
1955 JVM_END
1956
1957
1958 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj))
1959 {
1960 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1961 return cp->length();
1962 }
1963 JVM_END
1964
1965
1966 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jint index))
1967 {
1968 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1969 bounds_check(cp, index, CHECK_NULL);
1970 constantTag tag = cp->tag_at(index);
1971 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1972 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1973 }
1974 Klass* k = cp->klass_at(index, CHECK_NULL);
1975 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1976 }
1977 JVM_END
1978
1979 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jint index))
1980 {
1981 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1982 bounds_check(cp, index, CHECK_NULL);
1983 constantTag tag = cp->tag_at(index);
1984 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1985 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1986 }
1987 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1988 if (k == nullptr) return nullptr;
1989 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1990 }
1991 JVM_END
1992
1993 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1994 constantTag tag = cp->tag_at(index);
1995 if (!tag.is_method() && !tag.is_interface_method()) {
1996 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1997 }
1998 int klass_ref = cp->uncached_klass_ref_index_at(index);
1999 Klass* k_o;
2000 if (force_resolution) {
2001 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2002 } else {
2003 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2004 if (k_o == nullptr) return nullptr;
2005 }
2006 InstanceKlass* k = InstanceKlass::cast(k_o);
2007 Symbol* name = cp->uncached_name_ref_at(index);
2008 Symbol* sig = cp->uncached_signature_ref_at(index);
2009 methodHandle m (THREAD, k->find_method(name, sig));
2010 if (m.is_null()) {
2011 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2012 }
2013 oop method;
2014 if (m->is_object_initializer()) {
2015 method = Reflection::new_constructor(m, CHECK_NULL);
2016 } else {
2017 // new_method accepts <clinit> as Method here
2018 method = Reflection::new_method(m, true, CHECK_NULL);
2019 }
2020 return JNIHandles::make_local(THREAD, method);
2021 }
2022
2023 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jint index))
2024 {
2025 JvmtiVMObjectAllocEventCollector oam;
2026 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2027 bounds_check(cp, index, CHECK_NULL);
2028 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2029 return res;
2030 }
2031 JVM_END
2032
2033 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2034 {
2035 JvmtiVMObjectAllocEventCollector oam;
2036 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2037 bounds_check(cp, index, CHECK_NULL);
2038 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2039 return res;
2040 }
2041 JVM_END
2042
2043 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2044 constantTag tag = cp->tag_at(index);
2045 if (!tag.is_field()) {
2046 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2047 }
2048 int klass_ref = cp->uncached_klass_ref_index_at(index);
2049 Klass* k_o;
2050 if (force_resolution) {
2051 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2052 } else {
2053 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2054 if (k_o == nullptr) return nullptr;
2055 }
2056 InstanceKlass* k = InstanceKlass::cast(k_o);
2057 Symbol* name = cp->uncached_name_ref_at(index);
2058 Symbol* sig = cp->uncached_signature_ref_at(index);
2059 fieldDescriptor fd;
2060 Klass* target_klass = k->find_field(name, sig, &fd);
2061 if (target_klass == nullptr) {
2062 THROW_MSG_NULL(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2063 }
2064 oop field = Reflection::new_field(&fd, CHECK_NULL);
2065 return JNIHandles::make_local(THREAD, field);
2066 }
2067
2068 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jint index))
2069 {
2070 JvmtiVMObjectAllocEventCollector oam;
2071 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072 bounds_check(cp, index, CHECK_NULL);
2073 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2074 return res;
2075 }
2076 JVM_END
2077
2078 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jint index))
2079 {
2080 JvmtiVMObjectAllocEventCollector oam;
2081 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2082 bounds_check(cp, index, CHECK_NULL);
2083 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2084 return res;
2085 }
2086 JVM_END
2087
2088 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jint index))
2089 {
2090 JvmtiVMObjectAllocEventCollector oam;
2091 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 bounds_check(cp, index, CHECK_NULL);
2093 constantTag tag = cp->tag_at(index);
2094 if (!tag.is_field_or_method()) {
2095 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2096 }
2097 int klass_ref = cp->uncached_klass_ref_index_at(index);
2098 Symbol* klass_name = cp->klass_name_at(klass_ref);
2099 Symbol* member_name = cp->uncached_name_ref_at(index);
2100 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2101 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2102 objArrayHandle dest(THREAD, dest_o);
2103 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2104 dest->obj_at_put(0, str());
2105 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2106 dest->obj_at_put(1, str());
2107 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2108 dest->obj_at_put(2, str());
2109 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2110 }
2111 JVM_END
2112
2113 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jint index))
2114 {
2115 JvmtiVMObjectAllocEventCollector oam;
2116 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117 bounds_check(cp, index, CHECK_0);
2118 constantTag tag = cp->tag_at(index);
2119 if (!tag.is_field_or_method()) {
2120 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2121 }
2122 return (jint) cp->uncached_klass_ref_index_at(index);
2123 }
2124 JVM_END
2125
2126 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jint index))
2127 {
2128 JvmtiVMObjectAllocEventCollector oam;
2129 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2130 bounds_check(cp, index, CHECK_0);
2131 constantTag tag = cp->tag_at(index);
2132 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2133 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2134 }
2135 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2136 }
2137 JVM_END
2138
2139 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jint index))
2140 {
2141 JvmtiVMObjectAllocEventCollector oam;
2142 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_NULL);
2144 constantTag tag = cp->tag_at(index);
2145 if (!tag.is_name_and_type()) {
2146 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147 }
2148 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2149 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2150 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2151 objArrayHandle dest(THREAD, dest_o);
2152 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2153 dest->obj_at_put(0, str());
2154 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2155 dest->obj_at_put(1, str());
2156 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2157 }
2158 JVM_END
2159
2160 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jint index))
2161 {
2162 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 bounds_check(cp, index, CHECK_0);
2164 constantTag tag = cp->tag_at(index);
2165 if (!tag.is_int()) {
2166 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2167 }
2168 return cp->int_at(index);
2169 }
2170 JVM_END
2171
2172 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jint index))
2173 {
2174 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175 bounds_check(cp, index, CHECK_(0L));
2176 constantTag tag = cp->tag_at(index);
2177 if (!tag.is_long()) {
2178 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179 }
2180 return cp->long_at(index);
2181 }
2182 JVM_END
2183
2184 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jint index))
2185 {
2186 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2187 bounds_check(cp, index, CHECK_(0.0f));
2188 constantTag tag = cp->tag_at(index);
2189 if (!tag.is_float()) {
2190 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2191 }
2192 return cp->float_at(index);
2193 }
2194 JVM_END
2195
2196 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jint index))
2197 {
2198 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2199 bounds_check(cp, index, CHECK_(0.0));
2200 constantTag tag = cp->tag_at(index);
2201 if (!tag.is_double()) {
2202 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2203 }
2204 return cp->double_at(index);
2205 }
2206 JVM_END
2207
2208 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jint index))
2209 {
2210 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2211 bounds_check(cp, index, CHECK_NULL);
2212 constantTag tag = cp->tag_at(index);
2213 if (!tag.is_string()) {
2214 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2215 }
2216 oop str = cp->string_at(index, CHECK_NULL);
2217 return (jstring) JNIHandles::make_local(THREAD, str);
2218 }
2219 JVM_END
2220
2221 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jint index))
2222 {
2223 JvmtiVMObjectAllocEventCollector oam;
2224 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2225 bounds_check(cp, index, CHECK_NULL);
2226 constantTag tag = cp->tag_at(index);
2227 if (!tag.is_symbol()) {
2228 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2229 }
2230 Symbol* sym = cp->symbol_at(index);
2231 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2232 return (jstring) JNIHandles::make_local(THREAD, str());
2233 }
2234 JVM_END
2235
2236 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jint index))
2237 {
2238 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2239 bounds_check(cp, index, CHECK_0);
2240 constantTag tag = cp->tag_at(index);
2241 jbyte result = tag.value();
2242 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2243 // they are changed to the corresponding tags from the JVM spec, so that java code in
2244 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2245 if (tag.is_klass_or_reference()) {
2246 result = JVM_CONSTANT_Class;
2247 } else if (tag.is_string_index()) {
2248 result = JVM_CONSTANT_String;
2249 } else if (tag.is_method_type_in_error()) {
2250 result = JVM_CONSTANT_MethodType;
2251 } else if (tag.is_method_handle_in_error()) {
2252 result = JVM_CONSTANT_MethodHandle;
2253 } else if (tag.is_dynamic_constant_in_error()) {
2254 result = JVM_CONSTANT_Dynamic;
2255 }
2256 return result;
2257 }
2258 JVM_END
2259
2260 // Assertion support. //////////////////////////////////////////////////////////
2261
2262 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2263 assert(cls != nullptr, "bad class");
2264
2265 oop r = JNIHandles::resolve(cls);
2266 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2267 if (java_lang_Class::is_primitive(r)) return false;
2268
2269 Klass* k = java_lang_Class::as_Klass(r);
2270 assert(k->is_instance_klass(), "must be an instance klass");
2271 if (!k->is_instance_klass()) return false;
2272
2273 ResourceMark rm(THREAD);
2274 const char* name = k->name()->as_C_string();
2275 bool system_class = k->class_loader() == nullptr;
2276 return JavaAssertions::enabled(name, system_class);
2277
2278 JVM_END
2279
2280
2281 // Return a new AssertionStatusDirectives object with the fields filled in with
2282 // command-line assertion arguments (i.e., -ea, -da).
2283 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2284 JvmtiVMObjectAllocEventCollector oam;
2285 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2286 return JNIHandles::make_local(THREAD, asd);
2287 JVM_END
2288
2289 // Verification ////////////////////////////////////////////////////////////////////////////////
2290
2291 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2292
2293 // RedefineClasses support: bug 6214132 caused verification to fail.
2294 // All functions from this section, unless noted otherwise, should call the functions
2295 // get_klass_considering_redefinition(), or
2296 // get_instance_klass_considering_redefinition()
2297 // These functions return JvmtiThreadState::_scratch_class if the verifier
2298 // was invoked in the middle of the redefinition of cls.
2299 // See jvmtiThreadState.hpp for details.
2300
2301 inline Klass* get_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2303 if (k->is_instance_klass()) {
2304 return JvmtiThreadState::class_to_verify_considering_redefinition(InstanceKlass::cast(k), thread);
2305 } else {
2306 return k;
2307 }
2308 }
2309
2310 inline InstanceKlass* get_instance_klass_considering_redefinition(jclass cls, JavaThread* thread) {
2311 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve_non_null(cls));
2312 return JvmtiThreadState::class_to_verify_considering_redefinition(ik, thread);
2313 }
2314
2315 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
2316 oop mirror = JNIHandles::resolve_non_null(cls);
2317 if (java_lang_Class::is_primitive(mirror)) {
2318 return JNI_FALSE;
2319 }
2320 Klass* k = java_lang_Class::as_Klass(mirror);
2321 // This isn't necessary since answer is the same because redefinition
2322 // has already checked this matches for the scratch class.
2323 // k = get_klass_considering_redefinition(cls, thread)
2324 jboolean result = k->is_interface();
2325 assert(!result || k->is_instance_klass(),
2326 "all interfaces are instance types");
2327 return result;
2328 JVM_END
2329
2330 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2331 // No need to call get_klass_considering_redefinition() as redefinition cannot change a class's name.
2332 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333 return k->name()->as_utf8();
2334 JVM_END
2335
2336
2337 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2338 Klass* k = get_klass_considering_redefinition(cls, thread);
2339 // types will have length zero if this is not an InstanceKlass
2340 // (length is determined by call to JVM_GetClassCPEntriesCount)
2341 if (k->is_instance_klass()) {
2342 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2343 for (int index = cp->length() - 1; index >= 0; index--) {
2344 constantTag tag = cp->tag_at(index);
2345 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2346 }
2347 }
2348 JVM_END
2349
2350
2351 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2352 Klass* k = get_klass_considering_redefinition(cls, thread);
2353 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2354 JVM_END
2355
2356
2357 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2358 Klass* k = get_klass_considering_redefinition(cls, thread);
2359 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2360 JVM_END
2361
2362
2363 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2364 Klass* k = get_klass_considering_redefinition(cls, thread);
2365 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2366 JVM_END
2367
2368
2369 // The following methods, used for the verifier, are never called with
2370 // array klasses, so a direct cast to InstanceKlass is safe.
2371 // Typically, these methods are called in a loop with bounds determined
2372 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2373 // zero for arrays.
2374 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2375 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2376 Method* method = ik->methods()->at(method_index);
2377 int length = method->checked_exceptions_length();
2378 if (length > 0) {
2379 CheckedExceptionElement* table= method->checked_exceptions_start();
2380 for (int i = 0; i < length; i++) {
2381 exceptions[i] = table[i].class_cp_index;
2382 }
2383 }
2384 JVM_END
2385
2386
2387 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2388 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2389 Method* method = ik->methods()->at(method_index);
2390 return method->checked_exceptions_length();
2391 JVM_END
2392
2393
2394 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2395 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2396 Method* method = ik->methods()->at(method_index);
2397 memcpy(code, method->code_base(), method->code_size());
2398 JVM_END
2399
2400
2401 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2402 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2403 Method* method = ik->methods()->at(method_index);
2404 return method->code_size();
2405 JVM_END
2406
2407
2408 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2409 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2410 Method* method = ik->methods()->at(method_index);
2411 ExceptionTable extable(method);
2412 entry->start_pc = extable.start_pc(entry_index);
2413 entry->end_pc = extable.end_pc(entry_index);
2414 entry->handler_pc = extable.handler_pc(entry_index);
2415 entry->catchType = extable.catch_type_index(entry_index);
2416 JVM_END
2417
2418
2419 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2420 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2421 Method* method = ik->methods()->at(method_index);
2422 return method->exception_table_length();
2423 JVM_END
2424
2425
2426 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2427 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2428 Method* method = ik->methods()->at(method_index);
2429 return method->access_flags().as_method_flags();
2430 JVM_END
2431
2432
2433
2434 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2435 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2436 return ik->field_access_flags(field_index);
2437 JVM_END
2438
2439
2440 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2441 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2442 Method* method = ik->methods()->at(method_index);
2443 return method->max_locals();
2444 JVM_END
2445
2446
2447 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2448 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2449 Method* method = ik->methods()->at(method_index);
2450 return method->size_of_parameters();
2451 JVM_END
2452
2453
2454 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2455 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2456 Method* method = ik->methods()->at(method_index);
2457 return method->verifier_max_stack();
2458 JVM_END
2459
2460
2461 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2462 ResourceMark rm(THREAD);
2463 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2464 Method* method = ik->methods()->at(method_index);
2465 return method->name() == vmSymbols::object_initializer_name();
2466 JVM_END
2467
2468
2469 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2470 ResourceMark rm(THREAD);
2471 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2472 Method* method = ik->methods()->at(method_index);
2473 return method->is_overpass();
2474 JVM_END
2475
2476 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2477 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2478 Method* method = ik->methods()->at(method_index);
2479 return method->name()->as_utf8();
2480 JVM_END
2481
2482
2483 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2484 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2485 Method* method = ik->methods()->at(method_index);
2486 return method->signature()->as_utf8();
2487 JVM_END
2488
2489 /**
2490 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2491 * read entries in the constant pool. Since the old verifier always
2492 * works on a copy of the code, it will not see any rewriting that
2493 * may possibly occur in the middle of verification. So it is important
2494 * that nothing it calls tries to use the cpCache instead of the raw
2495 * constant pool, so we must use cp->uncached_x methods when appropriate.
2496 */
2497 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2498 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2499 ConstantPool* cp = ik->constants();
2500 switch (cp->tag_at(cp_index).value()) {
2501 case JVM_CONSTANT_Fieldref:
2502 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2503 default:
2504 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2505 }
2506 ShouldNotReachHere();
2507 return nullptr;
2508 JVM_END
2509
2510
2511 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2512 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2513 ConstantPool* cp = ik->constants();
2514 switch (cp->tag_at(cp_index).value()) {
2515 case JVM_CONSTANT_InterfaceMethodref:
2516 case JVM_CONSTANT_Methodref:
2517 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2518 default:
2519 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2520 }
2521 ShouldNotReachHere();
2522 return nullptr;
2523 JVM_END
2524
2525
2526 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2527 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2528 ConstantPool* cp = ik->constants();
2529 switch (cp->tag_at(cp_index).value()) {
2530 case JVM_CONSTANT_InterfaceMethodref:
2531 case JVM_CONSTANT_Methodref:
2532 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2533 default:
2534 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2535 }
2536 ShouldNotReachHere();
2537 return nullptr;
2538 JVM_END
2539
2540
2541 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2542 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2543 ConstantPool* cp = ik->constants();
2544 switch (cp->tag_at(cp_index).value()) {
2545 case JVM_CONSTANT_Fieldref:
2546 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2547 default:
2548 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2549 }
2550 ShouldNotReachHere();
2551 return nullptr;
2552 JVM_END
2553
2554
2555 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2556 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2557 ConstantPool* cp = ik->constants();
2558 Symbol* classname = cp->klass_name_at(cp_index);
2559 return classname->as_utf8();
2560 JVM_END
2561
2562
2563 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2564 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2565 ConstantPool* cp = ik->constants();
2566 switch (cp->tag_at(cp_index).value()) {
2567 case JVM_CONSTANT_Fieldref: {
2568 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2569 Symbol* classname = cp->klass_name_at(class_index);
2570 return classname->as_utf8();
2571 }
2572 default:
2573 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2574 }
2575 ShouldNotReachHere();
2576 return nullptr;
2577 JVM_END
2578
2579
2580 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2581 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2582 ConstantPool* cp = ik->constants();
2583 switch (cp->tag_at(cp_index).value()) {
2584 case JVM_CONSTANT_Methodref:
2585 case JVM_CONSTANT_InterfaceMethodref: {
2586 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2587 Symbol* classname = cp->klass_name_at(class_index);
2588 return classname->as_utf8();
2589 }
2590 default:
2591 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2592 }
2593 ShouldNotReachHere();
2594 return nullptr;
2595 JVM_END
2596
2597
2598 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2599 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2600 InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2601 ConstantPool* cp = ik->constants();
2602 ConstantPool* cp_called = ik_called->constants();
2603 switch (cp->tag_at(cp_index).value()) {
2604 case JVM_CONSTANT_Fieldref: {
2605 Symbol* name = cp->uncached_name_ref_at(cp_index);
2606 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2607 for (JavaFieldStream fs(ik_called); !fs.done(); fs.next()) {
2608 if (fs.name() == name && fs.signature() == signature) {
2609 return fs.access_flags().as_field_flags();
2610 }
2611 }
2612 return -1;
2613 }
2614 default:
2615 fatal("JVM_GetCPFieldModifiers: illegal constant");
2616 }
2617 ShouldNotReachHere();
2618 return 0;
2619 JVM_END
2620
2621
2622 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2623 InstanceKlass* ik = get_instance_klass_considering_redefinition(cls, thread);
2624 InstanceKlass* ik_called = get_instance_klass_considering_redefinition(called_cls, thread);
2625 ConstantPool* cp = ik->constants();
2626 switch (cp->tag_at(cp_index).value()) {
2627 case JVM_CONSTANT_Methodref:
2628 case JVM_CONSTANT_InterfaceMethodref: {
2629 Symbol* name = cp->uncached_name_ref_at(cp_index);
2630 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2631 Array<Method*>* methods = ik_called->methods();
2632 int methods_count = methods->length();
2633 for (int i = 0; i < methods_count; i++) {
2634 Method* method = methods->at(i);
2635 if (method->name() == name && method->signature() == signature) {
2636 return method->access_flags().as_method_flags();
2637 }
2638 }
2639 return -1;
2640 }
2641 default:
2642 fatal("JVM_GetCPMethodModifiers: illegal constant");
2643 }
2644 ShouldNotReachHere();
2645 return 0;
2646 JVM_END
2647
2648
2649 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2650
2651 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2652 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2653 JVM_END
2654
2655
2656 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2657 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2658 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2659 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2660 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2661 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2662 JVM_END
2663
2664 // Printing support //////////////////////////////////////////////////
2665 extern "C" {
2666
2667 ATTRIBUTE_PRINTF(3, 0)
2668 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2669 // Reject count values that are negative signed values converted to
2670 // unsigned; see bug 4399518, 4417214
2671 if ((intptr_t)count <= 0) return -1;
2672
2673 int result = os::vsnprintf(str, count, fmt, args);
2674 if (result > 0 && (size_t)result >= count) {
2675 result = -1;
2676 }
2677
2678 return result;
2679 }
2680
2681 ATTRIBUTE_PRINTF(3, 4)
2682 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2683 va_list args;
2684 int len;
2685 va_start(args, fmt);
2686 len = jio_vsnprintf(str, count, fmt, args);
2687 va_end(args);
2688 return len;
2689 }
2690
2691 ATTRIBUTE_PRINTF(2, 3)
2692 int jio_fprintf(FILE* f, const char *fmt, ...) {
2693 int len;
2694 va_list args;
2695 va_start(args, fmt);
2696 len = jio_vfprintf(f, fmt, args);
2697 va_end(args);
2698 return len;
2699 }
2700
2701 ATTRIBUTE_PRINTF(2, 0)
2702 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2703 if (Arguments::vfprintf_hook() != nullptr) {
2704 return Arguments::vfprintf_hook()(f, fmt, args);
2705 } else {
2706 return vfprintf(f, fmt, args);
2707 }
2708 }
2709
2710 ATTRIBUTE_PRINTF(1, 2)
2711 JNIEXPORT int jio_printf(const char *fmt, ...) {
2712 int len;
2713 va_list args;
2714 va_start(args, fmt);
2715 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2716 va_end(args);
2717 return len;
2718 }
2719
2720 // HotSpot specific jio method
2721 void jio_print(const char* s, size_t len) {
2722 // Try to make this function as atomic as possible.
2723 if (Arguments::vfprintf_hook() != nullptr) {
2724 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2725 } else {
2726 // Make an unused local variable to avoid warning from gcc compiler.
2727 bool dummy = os::write(defaultStream::output_fd(), s, len);
2728 }
2729 }
2730
2731 } // Extern C
2732
2733 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2734
2735 // In most of the JVM thread support functions we need to access the
2736 // thread through a ThreadsListHandle to prevent it from exiting and
2737 // being reclaimed while we try to operate on it. The exceptions to this
2738 // rule are when operating on the current thread, or if the monitor of
2739 // the target java.lang.Thread is locked at the Java level - in both
2740 // cases the target cannot exit.
2741
2742 static void thread_entry(JavaThread* thread, TRAPS) {
2743 HandleMark hm(THREAD);
2744 Handle obj(THREAD, thread->threadObj());
2745 JavaValue result(T_VOID);
2746 JavaCalls::call_virtual(&result,
2747 obj,
2748 vmClasses::Thread_klass(),
2749 vmSymbols::run_method_name(),
2750 vmSymbols::void_method_signature(),
2751 THREAD);
2752 }
2753
2754
2755 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2756 #if INCLUDE_CDS
2757 if (CDSConfig::allow_only_single_java_thread()) {
2758 // During java -Xshare:dump, if we allow multiple Java threads to
2759 // execute in parallel, symbols and classes may be loaded in
2760 // random orders which will make the resulting CDS archive
2761 // non-deterministic.
2762 //
2763 // Lucikly, during java -Xshare:dump, it's important to run only
2764 // the code in the main Java thread (which is NOT started here) that
2765 // creates the module graph, etc. It's safe to not start the other
2766 // threads which are launched by class static initializers
2767 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2768 if (log_is_enabled(Info, aot)) {
2769 ResourceMark rm;
2770 oop t = JNIHandles::resolve_non_null(jthread);
2771 log_info(aot)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2772 }
2773 return;
2774 }
2775 #endif
2776 JavaThread *native_thread = nullptr;
2777
2778 // We cannot hold the Threads_lock when we throw an exception,
2779 // due to rank ordering issues. Example: we might need to grab the
2780 // Heap_lock while we construct the exception.
2781 bool throw_illegal_thread_state = false;
2782
2783 // We must release the Threads_lock before we can post a jvmti event
2784 // in Thread::start.
2785 {
2786 ConditionalMutexLocker throttle_ml(ThreadsLockThrottle_lock, UseThreadsLockThrottleLock);
2787 // Ensure that the C++ Thread and OSThread structures aren't freed before
2788 // we operate.
2789 MutexLocker ml(Threads_lock);
2790
2791 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2792 // re-starting an already started thread, so we should usually find
2793 // that the JavaThread is null. However for a JNI attached thread
2794 // there is a small window between the Thread object being created
2795 // (with its JavaThread set) and the update to its threadStatus, so we
2796 // have to check for this
2797 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) {
2798 throw_illegal_thread_state = true;
2799 } else {
2800 jlong size =
2801 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2802 // Allocate the C++ Thread structure and create the native thread. The
2803 // stack size retrieved from java is 64-bit signed, but the constructor takes
2804 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2805 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2806 // - Avoid passing negative values which would result in really large stacks.
2807 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2808 size_t sz = size > 0 ? (size_t) size : 0;
2809 native_thread = new JavaThread(&thread_entry, sz);
2810
2811 // At this point it may be possible that no osthread was created for the
2812 // JavaThread due to lack of memory. Check for this situation and throw
2813 // an exception if necessary. Eventually we may want to change this so
2814 // that we only grab the lock if the thread was created successfully -
2815 // then we can also do this check and throw the exception in the
2816 // JavaThread constructor.
2817 if (native_thread->osthread() != nullptr) {
2818 // Note: the current thread is not being used within "prepare".
2819 native_thread->prepare(jthread);
2820 }
2821 }
2822 }
2823
2824 if (throw_illegal_thread_state) {
2825 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2826 }
2827
2828 assert(native_thread != nullptr, "Starting null thread?");
2829
2830 if (native_thread->osthread() == nullptr) {
2831 ResourceMark rm(thread);
2832 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
2833 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
2834 // No one should hold a reference to the 'native_thread'.
2835 native_thread->smr_delete();
2836 if (JvmtiExport::should_post_resource_exhausted()) {
2837 JvmtiExport::post_resource_exhausted(
2838 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2839 os::native_thread_creation_failed_msg());
2840 }
2841 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2842 os::native_thread_creation_failed_msg());
2843 }
2844
2845 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
2846
2847 Thread::start(native_thread);
2848
2849 JVM_END
2850
2851
2852 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2853 ThreadsListHandle tlh(thread);
2854 oop java_thread = nullptr;
2855 JavaThread* receiver = nullptr;
2856 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2857 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2858
2859 if (is_alive) {
2860 // jthread refers to a live JavaThread.
2861 Thread::set_priority(receiver, (ThreadPriority)prio);
2862 }
2863 // Implied else: If the JavaThread hasn't started yet, then the
2864 // priority set in the java.lang.Thread object above will be pushed
2865 // down when it does start.
2866 JVM_END
2867
2868
2869 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
2870 HOTSPOT_THREAD_YIELD();
2871 os::naked_yield();
2872 JVM_END
2873
2874 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
2875 if (nanos < 0) {
2876 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
2877 }
2878
2879 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
2880 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2881 }
2882
2883 // Save current thread state and restore it at the end of this block.
2884 // And set new thread state to SLEEPING.
2885 JavaThreadSleepState jtss(thread);
2886
2887 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
2888
2889 if (nanos == 0) {
2890 os::naked_yield();
2891 } else {
2892 ThreadState old_state = thread->osthread()->get_state();
2893 thread->osthread()->set_state(SLEEPING);
2894 if (!thread->sleep_nanos(nanos)) { // interrupted or async exception was installed
2895 // An asynchronous exception could have been thrown on
2896 // us while we were sleeping. We do not overwrite those.
2897 if (!HAS_PENDING_EXCEPTION) {
2898 HOTSPOT_THREAD_SLEEP_END(1);
2899 if (!thread->has_async_exception_condition()) {
2900 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2901 // to properly restore the thread state. That's likely wrong.
2902 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2903 }
2904 }
2905 }
2906 thread->osthread()->set_state(old_state);
2907 }
2908 HOTSPOT_THREAD_SLEEP_END(0);
2909 JVM_END
2910
2911 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
2912 oop jthread = thread->threadObj();
2913 assert(jthread != nullptr, "no current carrier thread!");
2914 return JNIHandles::make_local(THREAD, jthread);
2915 JVM_END
2916
2917 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2918 oop theThread = thread->vthread();
2919 assert(theThread != (oop)nullptr, "no current thread!");
2920 return JNIHandles::make_local(THREAD, theThread);
2921 JVM_END
2922
2923 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
2924 jobject theThread))
2925 oop threadObj = JNIHandles::resolve(theThread);
2926 thread->set_vthread(threadObj);
2927
2928 // Set _monitor_owner_id of new current Thread
2929 thread->set_monitor_owner_id(java_lang_Thread::thread_id(threadObj));
2930
2931 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
2932 JVM_END
2933
2934 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
2935 return ThreadIdentifier::unsafe_offset();
2936 JVM_END
2937
2938 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
2939 ThreadsListHandle tlh(thread);
2940 JavaThread* receiver = nullptr;
2941 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
2942 if (is_alive) {
2943 // jthread refers to a live JavaThread.
2944 receiver->interrupt();
2945 }
2946 JVM_END
2947
2948 // Return true iff the current thread has locked the object passed in
2949
2950 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2951 if (obj == nullptr) {
2952 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2953 }
2954 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2955 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
2956 JVM_END
2957
2958 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
2959 oop trace = java_lang_Thread::async_get_stack_trace(jthread, THREAD);
2960 return JNIHandles::make_local(THREAD, trace);
2961 JVM_END
2962
2963 JVM_ENTRY_PROF(jobject, JVM_CreateThreadSnapshot, JVM_CreateThreadSnapshot(JNIEnv* env, jobject jthread))
2964 #if INCLUDE_JVMTI
2965 oop snapshot = ThreadSnapshotFactory::get_thread_snapshot(jthread, THREAD);
2966 return JNIHandles::make_local(THREAD, snapshot);
2967 #else
2968 THROW_NULL(vmSymbols::java_lang_UnsupportedOperationException());
2969 #endif
2970 JVM_END
2971
2972 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
2973 // We don't use a ThreadsListHandle here because the current thread
2974 // must be alive.
2975 oop java_thread = JNIHandles::resolve_non_null(jthread);
2976 JavaThread* thr = java_lang_Thread::thread(java_thread);
2977 if (thread == thr && !thr->has_attached_via_jni()) {
2978 // Thread naming is only supported for the current thread and
2979 // we don't set the name of an attached thread to avoid stepping
2980 // on other programs.
2981 ResourceMark rm(thread);
2982 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
2983 os::set_native_thread_name(thread_name);
2984 }
2985 JVM_END
2986
2987 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
2988 oop theCache = thread->scopedValueCache();
2989 return JNIHandles::make_local(THREAD, theCache);
2990 JVM_END
2991
2992 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
2993 jobject theCache))
2994 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
2995 thread->set_scopedValueCache(objs);
2996 JVM_END
2997
2998 // java.lang.Package ////////////////////////////////////////////////////////////////
2999
3000
3001 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3002 ResourceMark rm(THREAD);
3003 JvmtiVMObjectAllocEventCollector oam;
3004 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3005 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3006 return (jstring) JNIHandles::make_local(THREAD, result);
3007 JVM_END
3008
3009
3010 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3011 JvmtiVMObjectAllocEventCollector oam;
3012 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3013 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3014 JVM_END
3015
3016
3017 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3018
3019
3020 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3021 MonitorLocker ml(Heap_lock);
3022 oop ref = Universe::reference_pending_list();
3023 if (ref != nullptr) {
3024 Universe::clear_reference_pending_list();
3025 }
3026 return JNIHandles::make_local(THREAD, ref);
3027 JVM_END
3028
3029 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3030 MonitorLocker ml(Heap_lock);
3031 return Universe::has_reference_pending_list();
3032 JVM_END
3033
3034 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3035 MonitorLocker ml(Heap_lock);
3036 while (!Universe::has_reference_pending_list()) {
3037 ml.wait();
3038 }
3039 JVM_END
3040
3041 JVM_ENTRY_PROF(jobject, JVM_ReferenceGet, JVM_ReferenceGet(JNIEnv* env, jobject ref))
3042 oop ref_oop = JNIHandles::resolve_non_null(ref);
3043 // PhantomReference has its own implementation of get().
3044 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3045 oop referent = java_lang_ref_Reference::weak_referent(ref_oop);
3046 return JNIHandles::make_local(THREAD, referent);
3047 JVM_END
3048
3049 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3050 oop ref_oop = JNIHandles::resolve_non_null(ref);
3051 // PhantomReference has its own implementation of refersTo().
3052 // See: JVM_PhantomReferenceRefersTo
3053 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3054 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3055 return referent == JNIHandles::resolve(o);
3056 JVM_END
3057
3058 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3059 oop ref_oop = JNIHandles::resolve_non_null(ref);
3060 // FinalReference has it's own implementation of clear().
3061 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3062 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3063 // If the referent has already been cleared then done.
3064 // However, if the referent is dead but has not yet been cleared by
3065 // concurrent reference processing, it should NOT be cleared here.
3066 // Instead, clearing should be left to the GC. Clearing it here could
3067 // detectably lose an expected notification, which is impossible with
3068 // STW reference processing. The clearing in enqueue() doesn't have
3069 // this problem, since the enqueue covers the notification, but it's not
3070 // worth the effort to handle that case specially.
3071 return;
3072 }
3073 java_lang_ref_Reference::clear_referent(ref_oop);
3074 JVM_END
3075
3076
3077 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3078
3079
3080 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3081 oop ref_oop = JNIHandles::resolve_non_null(ref);
3082 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3083 return referent == JNIHandles::resolve(o);
3084 JVM_END
3085
3086
3087 // ObjectInputStream ///////////////////////////////////////////////////////////////
3088
3089 // Return the first user-defined class loader up the execution stack, or null
3090 // if only code from the bootstrap or platform class loader is on the stack.
3091
3092 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3093 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3094 InstanceKlass* ik = vfst.method()->method_holder();
3095 oop loader = ik->class_loader();
3096 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3097 return JNIHandles::make_local(THREAD, loader);
3098 }
3099 }
3100 return nullptr;
3101 JVM_END
3102
3103
3104 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3105
3106
3107 // resolve array handle and check arguments
3108 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3109 if (arr == nullptr) {
3110 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3111 }
3112 oop a = JNIHandles::resolve_non_null(arr);
3113 if (!a->is_array()) {
3114 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3115 } else if (type_array_only && !a->is_typeArray()) {
3116 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3117 }
3118 return arrayOop(a);
3119 }
3120
3121
3122 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3123 arrayOop a = check_array(env, arr, false, CHECK_0);
3124 return a->length();
3125 JVM_END
3126
3127
3128 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3129 JvmtiVMObjectAllocEventCollector oam;
3130 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3131 jvalue value;
3132 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3133 oop box = Reflection::box(&value, type, CHECK_NULL);
3134 return JNIHandles::make_local(THREAD, box);
3135 JVM_END
3136
3137
3138 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3139 jvalue value;
3140 value.i = 0; // to initialize value before getting used in CHECK
3141 arrayOop a = check_array(env, arr, true, CHECK_(value));
3142 assert(a->is_typeArray(), "just checking");
3143 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3144 BasicType wide_type = (BasicType) wCode;
3145 if (type != wide_type) {
3146 Reflection::widen(&value, type, wide_type, CHECK_(value));
3147 }
3148 return value;
3149 JVM_END
3150
3151
3152 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3153 arrayOop a = check_array(env, arr, false, CHECK);
3154 oop box = JNIHandles::resolve(val);
3155 jvalue value;
3156 value.i = 0; // to initialize value before getting used in CHECK
3157 BasicType value_type;
3158 if (a->is_objArray()) {
3159 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3160 value_type = Reflection::unbox_for_regular_object(box, &value);
3161 } else {
3162 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3163 }
3164 Reflection::array_set(&value, a, index, value_type, CHECK);
3165 JVM_END
3166
3167
3168 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3169 arrayOop a = check_array(env, arr, true, CHECK);
3170 assert(a->is_typeArray(), "just checking");
3171 BasicType value_type = (BasicType) vCode;
3172 Reflection::array_set(&v, a, index, value_type, CHECK);
3173 JVM_END
3174
3175
3176 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3177 JvmtiVMObjectAllocEventCollector oam;
3178 oop element_mirror = JNIHandles::resolve(eltClass);
3179 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3180 return JNIHandles::make_local(THREAD, result);
3181 JVM_END
3182
3183
3184 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3185 JvmtiVMObjectAllocEventCollector oam;
3186 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3187 oop element_mirror = JNIHandles::resolve(eltClass);
3188 assert(dim_array->is_typeArray(), "just checking");
3189 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3190 return JNIHandles::make_local(THREAD, result);
3191 JVM_END
3192
3193
3194 // Library support ///////////////////////////////////////////////////////////////////////////
3195
3196 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3197 return ZipLibrary::handle();
3198 JVM_END
3199
3200 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3201 //%note jvm_ct
3202 char ebuf[1024];
3203 void *load_result;
3204 {
3205 ThreadToNativeFromVM ttnfvm(thread);
3206 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3207 }
3208 if (load_result == nullptr) {
3209 if (throwException) {
3210 char msg[1024];
3211 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3212 // Since 'ebuf' may contain a string encoded using
3213 // platform encoding scheme, we need to pass
3214 // Exceptions::unsafe_to_utf8 to the new_exception method
3215 // as the last argument. See bug 6367357.
3216 Handle h_exception =
3217 Exceptions::new_exception(thread,
3218 vmSymbols::java_lang_UnsatisfiedLinkError(),
3219 msg, Exceptions::unsafe_to_utf8);
3220
3221 THROW_HANDLE_NULL(h_exception);
3222 } else {
3223 log_info(library)("Failed to load library %s", name);
3224 return load_result;
3225 }
3226 }
3227 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3228 return load_result;
3229 JVM_END
3230
3231
3232 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3233 os::dll_unload(handle);
3234 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3235 JVM_END
3236
3237
3238 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3239 void* find_result = os::dll_lookup(handle, name);
3240 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3241 find_result != nullptr ? "Found" : "Failed to find",
3242 name, p2i(handle));
3243 return find_result;
3244 JVM_END
3245
3246
3247 // JNI version ///////////////////////////////////////////////////////////////////////////////
3248
3249 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3250 return Threads::is_supported_jni_version_including_1_1(version);
3251 JVM_END
3252
3253
3254 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3255 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3256 JVM_END
3257
3258 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3259 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3260 JVM_END
3261
3262 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3263 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3264 JVM_END
3265
3266 JVM_LEAF(jboolean, JVM_IsStaticallyLinked(void))
3267 return is_vm_statically_linked() ? JNI_TRUE : JNI_FALSE;
3268 JVM_END
3269
3270 // String support ///////////////////////////////////////////////////////////////////////////
3271
3272 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3273 JvmtiVMObjectAllocEventCollector oam;
3274 if (str == nullptr) return nullptr;
3275 oop string = JNIHandles::resolve_non_null(str);
3276 oop result = StringTable::intern(string, CHECK_NULL);
3277 return (jstring) JNIHandles::make_local(THREAD, result);
3278 JVM_END
3279
3280
3281 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3282
3283 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3284 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3285 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3286 // in the safepoint protocol, thread suspension, thread interruption, or most things of that
3287 // nature, except JavaThreads will be blocked by VM_Exit::block_if_vm_exited if the VM has
3288 // shutdown. JavaThreads will be "in native" when using this API from JDK code.
3289
3290
3291 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3292 VM_Exit::block_if_vm_exited();
3293 return new PlatformMutex();
3294 }
3295
3296
3297 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3298 VM_Exit::block_if_vm_exited();
3299 delete ((PlatformMutex*) mon);
3300 }
3301
3302
3303 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3304 VM_Exit::block_if_vm_exited();
3305 ((PlatformMutex*) mon)->lock();
3306 return 0;
3307 }
3308
3309
3310 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3311 VM_Exit::block_if_vm_exited();
3312 ((PlatformMutex*) mon)->unlock();
3313 }
3314
3315
3316 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3317
3318 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3319 Handle loader, jboolean throwError, TRAPS) {
3320 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, throwError != 0, CHECK_NULL);
3321
3322 // Check if we should initialize the class
3323 if (init && klass->is_instance_klass()) {
3324 klass->initialize(CHECK_NULL);
3325 }
3326 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3327 }
3328
3329
3330 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3331
3332 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3333 Handle method_handle;
3334 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3335 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3336 Handle receiver(THREAD, JNIHandles::resolve(obj));
3337 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3338 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3339 jobject res = JNIHandles::make_local(THREAD, result);
3340 if (JvmtiExport::should_post_vm_object_alloc()) {
3341 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3342 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3343 if (java_lang_Class::is_primitive(ret_type)) {
3344 // Only for primitive type vm allocates memory for java object.
3345 // See box() method.
3346 JvmtiExport::post_vm_object_alloc(thread, result);
3347 }
3348 }
3349 return res;
3350 } else {
3351 THROW_NULL(vmSymbols::java_lang_StackOverflowError());
3352 }
3353 JVM_END
3354
3355
3356 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3357 oop constructor_mirror = JNIHandles::resolve(c);
3358 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3359 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3360 jobject res = JNIHandles::make_local(THREAD, result);
3361 if (JvmtiExport::should_post_vm_object_alloc()) {
3362 JvmtiExport::post_vm_object_alloc(thread, result);
3363 }
3364 return res;
3365 JVM_END
3366
3367 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3369 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3370 JVM_END
3371
3372 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3373 jclass caller,
3374 jstring interfaceMethodName,
3375 jobject factoryType,
3376 jobject interfaceMethodType,
3377 jobject implementationMember,
3378 jobject dynamicMethodType,
3379 jclass lambdaProxyClass))
3380 #if INCLUDE_CDS
3381 if (!CDSConfig::is_dumping_archive() || !CDSConfig::is_dumping_lambdas_in_legacy_mode()) {
3382 return;
3383 }
3384
3385 InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3386 if (caller_ik->is_hidden()) {
3387 // Hidden classes not of type lambda proxy classes are currently not being archived.
3388 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3389 // registered for archiving.
3390 return;
3391 }
3392 InstanceKlass* lambda_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(lambdaProxyClass));
3393 assert(lambda_ik->is_hidden(), "must be a hidden class");
3394 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3395
3396 Symbol* interface_method_name = nullptr;
3397 if (interfaceMethodName != nullptr) {
3398 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3399 }
3400 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3401 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3402
3403 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3404 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3405
3406 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3407 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3408 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3409
3410 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3411 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3412
3413 LambdaProxyClassDictionary::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3414 interface_method_type, m, dynamic_method_type, THREAD);
3415 #endif // INCLUDE_CDS
3416 JVM_END
3417
3418 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3419 jclass caller,
3420 jstring interfaceMethodName,
3421 jobject factoryType,
3422 jobject interfaceMethodType,
3423 jobject implementationMember,
3424 jobject dynamicMethodType))
3425 #if INCLUDE_CDS
3426
3427 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3428 implementationMember == nullptr || dynamicMethodType == nullptr) {
3429 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3430 }
3431
3432 InstanceKlass* caller_ik = java_lang_Class::as_InstanceKlass(JNIHandles::resolve(caller));
3433 if (!caller_ik->in_aot_cache()) {
3434 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3435 return nullptr;
3436 }
3437
3438 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3439 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3440 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3441
3442 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3443 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3444
3445 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3446 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3447 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3448
3449 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3450 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3451
3452 InstanceKlass* loaded_lambda =
3453 LambdaProxyClassDictionary::load_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3454 interface_method_type, m, dynamic_method_type,
3455 CHECK_(nullptr));
3456 return loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3457 #else
3458 return nullptr;
3459 #endif // INCLUDE_CDS
3460 JVM_END
3461
3462 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3463 if (CDSConfig::is_dumping_static_archive()) {
3464 // We do this so that the default CDS archive can be deterministic.
3465 const char* release = VM_Version::vm_release();
3466 const char* dbg_level = VM_Version::jdk_debug_level();
3467 const char* version = VM_Version::internal_vm_info_string();
3468 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3469 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3470 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3471 seed += (jlong)VM_Version::vm_major_version();
3472 seed += (jlong)VM_Version::vm_minor_version();
3473 seed += (jlong)VM_Version::vm_security_version();
3474 seed += (jlong)VM_Version::vm_patch_version();
3475 if (seed == 0) { // don't let this ever be zero.
3476 seed = 0x87654321;
3477 }
3478 log_debug(aot)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3479 return seed;
3480 } else {
3481 return 0;
3482 }
3483 JVM_END
3484
3485 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3486 return CDSConfig::get_status();
3487 JVM_END
3488
3489 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3490 #if INCLUDE_CDS
3491 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3492 if (line != nullptr) {
3493 ResourceMark rm(THREAD);
3494 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3495 char* c_line = java_lang_String::as_utf8_string(h_line());
3496 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3497 // Note: LambdaFormInvokers::append take same format which is not
3498 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3499 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3500 }
3501 if (ClassListWriter::is_enabled()) {
3502 ClassListWriter w;
3503 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3504 }
3505 }
3506 #endif // INCLUDE_CDS
3507 JVM_END
3508
3509 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3510 #if INCLUDE_CDS
3511 assert(CDSConfig::is_logging_dynamic_proxies(), "sanity");
3512
3513 ResourceMark rm(THREAD);
3514 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3515 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3516 oop loader_oop = JNIHandles::resolve(loader);
3517 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3518
3519 AOTConstantPoolResolver::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3520 #endif // INCLUDE_CDS
3521 JVM_END
3522
3523 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3524 #if INCLUDE_CDS
3525 ResourceMark rm(THREAD);
3526 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3527 char* file_name = java_lang_String::as_utf8_string(file_handle());
3528 AOTMetaspace::dump_loaded_classes(file_name, THREAD);
3529 #endif // INCLUDE_CDS
3530 JVM_END
3531
3532 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3533 #if INCLUDE_CDS
3534 ResourceMark rm(THREAD);
3535 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3536 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3537 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3538 #endif // INCLUDE_CDS
3539 JVM_END
3540
3541 JVM_ENTRY(jboolean, JVM_NeedsClassInitBarrierForCDS(JNIEnv* env, jclass cls))
3542 #if INCLUDE_CDS
3543 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3544 if (!k->is_instance_klass()) {
3545 return false;
3546 } else {
3547 if (InstanceKlass::cast(k)->is_enum_subclass() ||
3548 AOTClassInitializer::can_archive_initialized_mirror(InstanceKlass::cast(k))) {
3549 // This class will be cached in AOT-initialized state. No need for init barriers.
3550 return false;
3551 } else {
3552 // If we cannot cache the class in AOT-initialized state, java.lang.invoke handles
3553 // must emit barriers to ensure class initialization during production run.
3554 ResourceMark rm(THREAD);
3555 log_debug(aot)("NeedsClassInitBarrierForCDS: %s", k->external_name());
3556 return true;
3557 }
3558 }
3559 #else
3560 return false;
3561 #endif // INCLUDE_CDS
3562 JVM_END
3563
3564 // Returns an array of all live Thread objects (VM internal JavaThreads,
3565 // jvmti agent threads, and JNI attaching threads are skipped)
3566 // See CR 6404306 regarding JNI attaching threads
3567 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3568 ResourceMark rm(THREAD);
3569 ThreadsListEnumerator tle(THREAD, false, false);
3570 JvmtiVMObjectAllocEventCollector oam;
3571
3572 int num_threads = tle.num_threads();
3573 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3574 objArrayHandle threads_ah(THREAD, r);
3575
3576 for (int i = 0; i < num_threads; i++) {
3577 Handle h = tle.get_threadObj(i);
3578 threads_ah->obj_at_put(i, h());
3579 }
3580
3581 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3582 JVM_END
3583
3584
3585 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3586 // Return StackTraceElement[][], each element is the stack trace of a thread in
3587 // the corresponding entry in the given threads array
3588 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3589 JvmtiVMObjectAllocEventCollector oam;
3590
3591 // Check if threads is null
3592 if (threads == nullptr) {
3593 THROW_NULL(vmSymbols::java_lang_NullPointerException());
3594 }
3595
3596 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3597 objArrayHandle ah(THREAD, a);
3598 int num_threads = ah->length();
3599 // check if threads is non-empty array
3600 if (num_threads == 0) {
3601 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3602 }
3603
3604 // check if threads is not an array of objects of Thread class
3605 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3606 if (k != vmClasses::Thread_klass()) {
3607 THROW_NULL(vmSymbols::java_lang_IllegalArgumentException());
3608 }
3609
3610 ResourceMark rm(THREAD);
3611
3612 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3613 for (int i = 0; i < num_threads; i++) {
3614 oop thread_obj = ah->obj_at(i);
3615 instanceHandle h(THREAD, (instanceOop) thread_obj);
3616 thread_handle_array->append(h);
3617 }
3618
3619 // The JavaThread references in thread_handle_array are validated
3620 // in VM_ThreadDump::doit().
3621 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3622 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3623
3624 JVM_END
3625
3626 // JVM monitoring and management support
3627 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3628 return Management::get_jmm_interface(version);
3629 JVM_END
3630
3631 // com.sun.tools.attach.VirtualMachine agent properties support
3632 //
3633 // Initialize the agent properties with the properties maintained in the VM
3634 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3635 ResourceMark rm;
3636
3637 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3638
3639 PUTPROP(props, "sun.java.command", Arguments::java_command());
3640 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3641 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3642 return properties;
3643 JVM_END
3644
3645 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3646 {
3647 JvmtiVMObjectAllocEventCollector oam;
3648
3649 if (ofClass == nullptr) {
3650 return nullptr;
3651 }
3652 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3653 // Special handling for primitive objects
3654 if (java_lang_Class::is_primitive(mirror())) {
3655 return nullptr;
3656 }
3657 Klass* k = java_lang_Class::as_Klass(mirror());
3658 if (!k->is_instance_klass()) {
3659 return nullptr;
3660 }
3661 InstanceKlass* ik = InstanceKlass::cast(k);
3662 int encl_method_class_idx = ik->enclosing_method_class_index();
3663 if (encl_method_class_idx == 0) {
3664 return nullptr;
3665 }
3666 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3667 objArrayHandle dest(THREAD, dest_o);
3668 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3669 dest->obj_at_put(0, enc_k->java_mirror());
3670 int encl_method_method_idx = ik->enclosing_method_method_index();
3671 if (encl_method_method_idx != 0) {
3672 Symbol* sym = ik->constants()->symbol_at(
3673 extract_low_short_from_int(
3674 ik->constants()->name_and_type_at(encl_method_method_idx)));
3675 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3676 dest->obj_at_put(1, str());
3677 sym = ik->constants()->symbol_at(
3678 extract_high_short_from_int(
3679 ik->constants()->name_and_type_at(encl_method_method_idx)));
3680 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3681 dest->obj_at_put(2, str());
3682 }
3683 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3684 }
3685 JVM_END
3686
3687 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3688 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3689 ResourceMark rm(THREAD);
3690
3691 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3692 return nullptr;
3693 }
3694
3695 char** vm_flags = Arguments::jvm_flags_array();
3696 char** vm_args = Arguments::jvm_args_array();
3697 int num_flags = Arguments::num_jvm_flags();
3698 int num_args = Arguments::num_jvm_args();
3699
3700 InstanceKlass* ik = vmClasses::String_klass();
3701 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3702 objArrayHandle result_h(THREAD, r);
3703
3704 int index = 0;
3705 for (int j = 0; j < num_flags; j++, index++) {
3706 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3707 result_h->obj_at_put(index, h());
3708 }
3709 for (int i = 0; i < num_args; i++, index++) {
3710 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3711 result_h->obj_at_put(index, h());
3712 }
3713 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3714 JVM_END
3715
3716 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3717 return os::get_signal_number(name);
3718 JVM_END
3719
3720 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3721 #if INCLUDE_JVMTI
3722 if (!DoJVMTIVirtualThreadTransitions) {
3723 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3724 return;
3725 }
3726 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3727 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3728 } else {
3729 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3730 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3731 }
3732 #endif
3733 JVM_END
3734
3735 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3736 #if INCLUDE_JVMTI
3737 if (!DoJVMTIVirtualThreadTransitions) {
3738 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3739 return;
3740 }
3741 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3742 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3743 } else {
3744 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3745 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3746 }
3747 #endif
3748 JVM_END
3749
3750 // If notifications are disabled then just update the VTMS transition bit and return.
3751 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3752 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3753 #if INCLUDE_JVMTI
3754 if (!DoJVMTIVirtualThreadTransitions) {
3755 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3756 return;
3757 }
3758 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3759 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3760 } else {
3761 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3762 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3763 }
3764 #endif
3765 JVM_END
3766
3767 // If notifications are disabled then just update the VTMS transition bit and return.
3768 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3769 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3770 #if INCLUDE_JVMTI
3771 if (!DoJVMTIVirtualThreadTransitions) {
3772 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3773 return;
3774 }
3775 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3776 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3777 } else {
3778 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3779 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3780 }
3781 #endif
3782 JVM_END
3783
3784 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
3785 // Needed to avoid deadlocks with JVMTI suspend mechanism.
3786 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
3787 #if INCLUDE_JVMTI
3788 if (!DoJVMTIVirtualThreadTransitions) {
3789 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3790 return;
3791 }
3792 assert(thread->is_disable_suspend() != (bool)enter,
3793 "nested or unbalanced monitor enter/exit is not allowed");
3794 thread->toggle_is_disable_suspend();
3795 #endif
3796 JVM_END
3797
3798 JVM_ENTRY(void, JVM_VirtualThreadPinnedEvent(JNIEnv* env, jclass ignored, jstring op))
3799 #if INCLUDE_JFR
3800 freeze_result result = THREAD->last_freeze_fail_result();
3801 assert(result != freeze_ok, "sanity check");
3802 EventVirtualThreadPinned event(UNTIMED);
3803 event.set_starttime(THREAD->last_freeze_fail_time());
3804 if (event.should_commit()) {
3805 ResourceMark rm(THREAD);
3806 const char *str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(op));
3807 THREAD->post_vthread_pinned_event(&event, str, result);
3808 }
3809 #endif
3810 JVM_END
3811
3812 JVM_ENTRY(jobject, JVM_TakeVirtualThreadListToUnblock(JNIEnv* env, jclass ignored))
3813 ParkEvent* parkEvent = ObjectMonitor::vthread_unparker_ParkEvent();
3814 assert(parkEvent != nullptr, "not initialized");
3815
3816 OopHandle& list_head = ObjectMonitor::vthread_list_head();
3817 oop vthread_head = nullptr;
3818 while (true) {
3819 if (list_head.peek() != nullptr) {
3820 for (;;) {
3821 oop head = list_head.resolve();
3822 if (list_head.cmpxchg(head, nullptr) == head) {
3823 return JNIHandles::make_local(THREAD, head);
3824 }
3825 }
3826 }
3827 ThreadBlockInVM tbivm(THREAD);
3828 parkEvent->park();
3829 }
3830 JVM_END
3831 /*
3832 * Return the current class's class file version. The low order 16 bits of the
3833 * returned jint contain the class's major version. The high order 16 bits
3834 * contain the class's minor version.
3835 */
3836 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
3837 oop mirror = JNIHandles::resolve_non_null(current);
3838 if (java_lang_Class::is_primitive(mirror)) {
3839 // return latest major version and minor version of 0.
3840 return JVM_CLASSFILE_MAJOR_VERSION;
3841 }
3842 InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3843 return (ik->minor_version() << 16) | ik->major_version();
3844 JVM_END
3845
3846 /*
3847 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
3848 * get the value will see a materialized value and not a scalar-replaced
3849 * null value.
3850 */
3851 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
3852 JVM_EnsureMaterializedForStackWalk(env, value);
3853 JVM_END
3854
3855 /*
3856 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
3857 */
3858 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
3859 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
3860 JVM_END
3861
3862 #define DO_COUNTERS(macro) \
3863 macro(JVM_CurrentTimeMillis) \
3864 macro(JVM_NanoTime) \
3865 macro(JVM_GetNanoTimeAdjustment) \
3866 macro(JVM_ArrayCopy) \
3867 macro(JVM_GetProperties) \
3868 macro(JVM_GetTemporaryDirectory) \
3869 macro(JVM_BeforeHalt) \
3870 macro(JVM_Halt) \
3871 macro(JVM_GC) \
3872 macro(JVM_MaxObjectInspectionAge) \
3873 macro(JVM_TotalMemory) \
3874 macro(JVM_FreeMemory) \
3875 macro(JVM_MaxMemory) \
3876 macro(JVM_ActiveProcessorCount) \
3877 macro(JVM_IsUseContainerSupport) \
3878 macro(JVM_FillInStackTrace) \
3879 macro(JVM_GetExtendedNPEMessage) \
3880 macro(JVM_InitStackTraceElementArray) \
3881 macro(JVM_InitStackTraceElement) \
3882 macro(JVM_ExpandStackFrameInfo) \
3883 macro(JVM_CallStackWalk) \
3884 macro(JVM_MoreStackWalk) \
3885 macro(JVM_SetStackWalkContinuation) \
3886 macro(JVM_IHashCode) \
3887 macro(JVM_MonitorWait) \
3888 macro(JVM_MonitorNotify) \
3889 macro(JVM_MonitorNotifyAll) \
3890 macro(JVM_Clone) \
3891 macro(JVM_ReportFinalizationComplete) \
3892 macro(JVM_IsFinalizationEnabled) \
3893 macro(JVM_RegisterContinuationMethods) \
3894 macro(JVM_NativePath) \
3895 macro(JVM_GetCallerClass) \
3896 macro(JVM_FindPrimitiveClass) \
3897 macro(JVM_FindClassFromBootLoader) \
3898 macro(JVM_FindClassFromCaller) \
3899 macro(JVM_FindClassFromClass) \
3900 macro(JVM_DefineClass) \
3901 macro(JVM_LookupDefineClass) \
3902 macro(JVM_DefineClassWithSource) \
3903 macro(JVM_FindLoadedClass) \
3904 macro(JVM_DefineModule) \
3905 macro(JVM_SetBootLoaderUnnamedModule) \
3906 macro(JVM_AddModuleExports) \
3907 macro(JVM_AddModuleExportsToAllUnnamed) \
3908 macro(JVM_AddModuleExportsToAll) \
3909 macro(JVM_AddReadsModule) \
3910 macro(JVM_DefineArchivedModules) \
3911 macro(JVM_InitClassName) \
3912 macro(JVM_GetClassInterfaces) \
3913 macro(JVM_IsInterface) \
3914 macro(JVM_IsHiddenClass) \
3915 macro(JVM_FindScopedValueBindings) \
3916 macro(JVM_GetDeclaredClasses) \
3917 macro(JVM_GetDeclaringClass) \
3918 macro(JVM_GetSimpleBinaryName) \
3919 macro(JVM_GetClassSignature) \
3920 macro(JVM_GetClassAnnotations) \
3921 macro(JVM_GetClassTypeAnnotations) \
3922 macro(JVM_GetMethodTypeAnnotations) \
3923 macro(JVM_GetFieldTypeAnnotations) \
3924 macro(JVM_GetMethodParameters) \
3925 macro(JVM_GetClassDeclaredFields) \
3926 macro(JVM_IsRecord) \
3927 macro(JVM_GetRecordComponents) \
3928 macro(JVM_GetClassDeclaredMethods) \
3929 macro(JVM_GetClassDeclaredConstructors) \
3930 macro(JVM_AreNestMates) \
3931 macro(JVM_GetNestHost) \
3932 macro(JVM_GetNestMembers) \
3933 macro(JVM_GetPermittedSubclasses) \
3934 macro(JVM_GetClassConstantPool) \
3935 macro(JVM_ConstantPoolGetSize) \
3936 macro(JVM_ConstantPoolGetClassAt) \
3937 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
3938 macro(JVM_ConstantPoolGetMethodAt) \
3939 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
3940 macro(JVM_ConstantPoolGetFieldAt) \
3941 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
3942 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
3943 macro(JVM_ConstantPoolGetClassRefIndexAt) \
3944 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
3945 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
3946 macro(JVM_ConstantPoolGetIntAt) \
3947 macro(JVM_ConstantPoolGetLongAt) \
3948 macro(JVM_ConstantPoolGetFloatAt) \
3949 macro(JVM_ConstantPoolGetDoubleAt) \
3950 macro(JVM_ConstantPoolGetStringAt) \
3951 macro(JVM_ConstantPoolGetUTF8At) \
3952 macro(JVM_ConstantPoolGetTagAt) \
3953 macro(JVM_DesiredAssertionStatus) \
3954 macro(JVM_AssertionStatusDirectives) \
3955 macro(JVM_GetClassNameUTF) \
3956 macro(JVM_GetClassCPTypes) \
3957 macro(JVM_GetClassCPEntriesCount) \
3958 macro(JVM_GetClassFieldsCount) \
3959 macro(JVM_GetClassMethodsCount) \
3960 macro(JVM_GetMethodIxExceptionIndexes) \
3961 macro(JVM_GetMethodIxExceptionsCount) \
3962 macro(JVM_GetMethodIxByteCode) \
3963 macro(JVM_GetMethodIxByteCodeLength) \
3964 macro(JVM_GetMethodIxExceptionTableEntry) \
3965 macro(JVM_GetMethodIxExceptionTableLength) \
3966 macro(JVM_GetMethodIxModifiers) \
3967 macro(JVM_GetFieldIxModifiers) \
3968 macro(JVM_GetMethodIxLocalsCount) \
3969 macro(JVM_GetMethodIxArgsSize) \
3970 macro(JVM_GetMethodIxMaxStack) \
3971 macro(JVM_IsConstructorIx) \
3972 macro(JVM_IsVMGeneratedMethodIx) \
3973 macro(JVM_GetMethodIxNameUTF) \
3974 macro(JVM_GetMethodIxSignatureUTF) \
3975 macro(JVM_GetCPFieldNameUTF) \
3976 macro(JVM_GetCPMethodNameUTF) \
3977 macro(JVM_GetCPMethodSignatureUTF) \
3978 macro(JVM_GetCPFieldSignatureUTF) \
3979 macro(JVM_GetCPClassNameUTF) \
3980 macro(JVM_GetCPFieldClassNameUTF) \
3981 macro(JVM_GetCPMethodClassNameUTF) \
3982 macro(JVM_GetCPFieldModifiers) \
3983 macro(JVM_GetCPMethodModifiers) \
3984 macro(JVM_ReleaseUTF) \
3985 macro(JVM_IsSameClassPackage) \
3986 macro(JVM_StartThread) \
3987 macro(JVM_SetThreadPriority) \
3988 macro(JVM_Yield) \
3989 macro(JVM_SleepNanos) \
3990 macro(JVM_CurrentCarrierThread) \
3991 macro(JVM_CurrentThread) \
3992 macro(JVM_SetCurrentThread) \
3993 macro(JVM_GetNextThreadIdOffset) \
3994 macro(JVM_Interrupt) \
3995 macro(JVM_HoldsLock) \
3996 macro(JVM_GetStackTrace) \
3997 macro(JVM_CreateThreadSnapshot) \
3998 macro(JVM_SetNativeThreadName) \
3999 macro(JVM_ScopedValueCache) \
4000 macro(JVM_SetScopedValueCache) \
4001 macro(JVM_GetSystemPackage) \
4002 macro(JVM_GetSystemPackages) \
4003 macro(JVM_GetAndClearReferencePendingList) \
4004 macro(JVM_HasReferencePendingList) \
4005 macro(JVM_WaitForReferencePendingList) \
4006 macro(JVM_ReferenceGet) \
4007 macro(JVM_ReferenceRefersTo) \
4008 macro(JVM_ReferenceClear) \
4009 macro(JVM_PhantomReferenceRefersTo) \
4010 macro(JVM_LatestUserDefinedLoader) \
4011 macro(JVM_GetArrayLength) \
4012 macro(JVM_GetArrayElement) \
4013 macro(JVM_GetPrimitiveArrayElement) \
4014 macro(JVM_SetArrayElement) \
4015 macro(JVM_SetPrimitiveArrayElement) \
4016 macro(JVM_NewArray) \
4017 macro(JVM_NewMultiArray) \
4018 macro(JVM_LoadZipLibrary) \
4019 macro(JVM_LoadLibrary) \
4020 macro(JVM_UnloadLibrary) \
4021 macro(JVM_FindLibraryEntry) \
4022 macro(JVM_IsSupportedJNIVersion) \
4023 macro(JVM_IsPreviewEnabled) \
4024 macro(JVM_IsContinuationsSupported) \
4025 macro(JVM_IsForeignLinkerSupported) \
4026 macro(JVM_InternString) \
4027 macro(JVM_InvokeMethod) \
4028 macro(JVM_NewInstanceFromConstructor) \
4029 macro(JVM_InitializeFromArchive) \
4030 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4031 macro(JVM_LookupLambdaProxyClassFromArchive) \
4032 macro(JVM_GetRandomSeedForDumping) \
4033 macro(JVM_LogLambdaFormInvoker) \
4034 macro(JVM_LogDynamicProxy) \
4035 macro(JVM_DumpClassListToFile) \
4036 macro(JVM_DumpDynamicArchive) \
4037 macro(JVM_GetAllThreads) \
4038 macro(JVM_DumpThreads) \
4039 macro(JVM_GetManagement) \
4040 macro(JVM_InitAgentProperties) \
4041 macro(JVM_GetEnclosingMethodInfo) \
4042 macro(JVM_GetVmArguments) \
4043 macro(JVM_FindSignal) \
4044 macro(JVM_VirtualThreadStart) \
4045 macro(JVM_VirtualThreadEnd) \
4046 macro(JVM_VirtualThreadMount) \
4047 macro(JVM_VirtualThreadUnmount) \
4048 macro(JVM_GetClassFileVersion) \
4049 macro(JVM_EnsureMaterializedForStackWalk_func) \
4050 macro(JVM_PrintWarningAtDynamicAgentLoad)
4051
4052 #define INIT_COUNTER(name) \
4053 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4054 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4055
4056 void perf_jvm_init() {
4057 if (ProfileVMCalls && UsePerfData) {
4058 EXCEPTION_MARK;
4059
4060 DO_COUNTERS(INIT_COUNTER)
4061
4062 if (HAS_PENDING_EXCEPTION) {
4063 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4064 }
4065 }
4066 }
4067
4068 #undef INIT_COUNTER
4069
4070 #define PRINT_COUNTER(name) {\
4071 jlong count = _perf_##name##_count->get_value(); \
4072 if (count > 0) { \
4073 st->print_cr(" %-40s = " JLONG_FORMAT_W(6) "us (elapsed) " JLONG_FORMAT_W(6) "us (thread) (" JLONG_FORMAT_W(5) " events)", \
4074 #name, \
4075 _perf_##name##_timer->elapsed_counter_value_us(), \
4076 _perf_##name##_timer->thread_counter_value_us(), count); \
4077 }}
4078
4079 void perf_jvm_print_on(outputStream* st) {
4080 if (ProfileVMCalls && UsePerfData) {
4081 DO_COUNTERS(PRINT_COUNTER)
4082 } else {
4083 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4084 }
4085 }
4086
4087 #undef PRINT_COUNTER