1 /*
2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/classListParser.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/classPrelinker.hpp"
30 #include "cds/dynamicArchive.hpp"
31 #include "cds/heapShared.hpp"
32 #include "cds/lambdaFormInvokers.hpp"
33 #include "classfile/classFileStream.hpp"
34 #include "classfile/classLoader.inline.hpp"
35 #include "classfile/classLoaderData.hpp"
36 #include "classfile/classLoaderData.inline.hpp"
37 #include "classfile/classLoadInfo.hpp"
38 #include "classfile/javaAssertions.hpp"
39 #include "classfile/javaClasses.inline.hpp"
40 #include "classfile/moduleEntry.hpp"
41 #include "classfile/modules.hpp"
42 #include "classfile/packageEntry.hpp"
43 #include "classfile/stringTable.hpp"
44 #include "classfile/symbolTable.hpp"
45 #include "classfile/systemDictionary.hpp"
46 #include "classfile/vmClasses.hpp"
47 #include "classfile/vmSymbols.hpp"
48 #include "gc/shared/collectedHeap.inline.hpp"
49 #include "interpreter/bytecode.hpp"
50 #include "interpreter/bytecodeUtils.hpp"
51 #include "jfr/jfrEvents.hpp"
52 #include "jvm.h"
53 #include "logging/log.hpp"
54 #include "memory/oopFactory.hpp"
55 #include "memory/referenceType.hpp"
56 #include "memory/resourceArea.hpp"
57 #include "memory/universe.hpp"
58 #include "oops/access.inline.hpp"
59 #include "oops/constantPool.hpp"
60 #include "oops/fieldStreams.inline.hpp"
61 #include "oops/instanceKlass.hpp"
62 #include "oops/klass.inline.hpp"
63 #include "oops/method.hpp"
64 #include "oops/recordComponent.hpp"
65 #include "oops/objArrayKlass.hpp"
66 #include "oops/objArrayOop.inline.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "prims/foreignGlobals.hpp"
69 #include "prims/jvm_misc.hpp"
70 #include "prims/jvmtiExport.hpp"
71 #include "prims/jvmtiThreadState.inline.hpp"
72 #include "prims/stackwalk.hpp"
73 #include "runtime/arguments.hpp"
74 #include "runtime/atomic.hpp"
75 #include "runtime/continuation.hpp"
76 #include "runtime/globals_extension.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/deoptimization.hpp"
81 #include "runtime/handshake.hpp"
82 #include "runtime/java.hpp"
83 #include "runtime/javaCalls.hpp"
84 #include "runtime/javaThread.hpp"
85 #include "runtime/jfieldIDWorkaround.hpp"
86 #include "runtime/jniHandles.inline.hpp"
87 #include "runtime/os.inline.hpp"
88 #include "runtime/osThread.hpp"
89 #include "runtime/perfData.inline.hpp"
90 #include "runtime/reflection.hpp"
91 #include "runtime/synchronizer.hpp"
92 #include "runtime/threadIdentifier.hpp"
93 #include "runtime/threadSMR.hpp"
94 #include "runtime/vframe.inline.hpp"
95 #include "runtime/vmOperations.hpp"
96 #include "runtime/vm_version.hpp"
97 #include "services/attachListener.hpp"
98 #include "services/management.hpp"
99 #include "services/threadService.hpp"
100 #include "utilities/checkedCast.hpp"
101 #include "utilities/copy.hpp"
102 #include "utilities/defaultStream.hpp"
103 #include "utilities/dtrace.hpp"
104 #include "utilities/events.hpp"
105 #include "utilities/macros.hpp"
106 #include "utilities/utf8.hpp"
107 #include "utilities/zipLibrary.hpp"
108 #if INCLUDE_CDS
109 #include "classfile/systemDictionaryShared.hpp"
110 #endif
111 #if INCLUDE_JFR
112 #include "jfr/jfr.hpp"
113 #endif
114 #if INCLUDE_MANAGEMENT
115 #include "services/finalizerService.hpp"
116 #endif
117 #ifdef LINUX
118 #include "osContainer_linux.hpp"
119 #endif
120
121 #include <errno.h>
122
123 /*
124 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
125 such ctors and calls MUST NOT come between an oop declaration/init and its
126 usage because if objects are move this may cause various memory stomps, bus
127 errors and segfaults. Here is a cookbook for causing so called "naked oop
128 failures":
129
130 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
131 // Object address to be held directly in mirror & not visible to GC
132 oop mirror = JNIHandles::resolve_non_null(ofClass);
133
134 // If this ctor can hit a safepoint, moving objects around, then
135 ComplexConstructor foo;
136
137 // Boom! mirror may point to JUNK instead of the intended object
138 (some dereference of mirror)
139
140 // Here's another call that may block for GC, making mirror stale
141 MutexLocker ml(some_lock);
142
143 // And here's an initializer that can result in a stale oop
144 // all in one step.
145 oop o = call_that_can_throw_exception(TRAPS);
146
147
148 The solution is to keep the oop declaration BELOW the ctor or function
149 call that might cause a GC, do another resolve to reassign the oop, or
150 consider use of a Handle instead of an oop so there is immunity from object
151 motion. But note that the "QUICK" entries below do not have a handlemark
152 and thus can only support use of handles passed in.
153 */
154
155 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
156 ResourceMark rm;
157 int line_number = -1;
158 const char * source_file = nullptr;
159 const char * trace = "explicit";
160 InstanceKlass* caller = nullptr;
161 JavaThread* jthread = THREAD;
162 if (jthread->has_last_Java_frame()) {
163 vframeStream vfst(jthread);
164
165 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
166 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
167 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
168 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
169 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
170
171 Method* last_caller = nullptr;
172
173 while (!vfst.at_end()) {
174 Method* m = vfst.method();
175 if (!vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass())&&
176 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
177 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
178 break;
179 }
180 last_caller = m;
181 vfst.next();
182 }
183 // if this is called from Class.forName0 and that is called from Class.forName,
184 // then print the caller of Class.forName. If this is Class.loadClass, then print
185 // that caller, otherwise keep quiet since this should be picked up elsewhere.
186 bool found_it = false;
187 if (!vfst.at_end() &&
188 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
189 vfst.method()->name() == vmSymbols::forName0_name()) {
190 vfst.next();
191 if (!vfst.at_end() &&
192 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
193 vfst.method()->name() == vmSymbols::forName_name()) {
194 vfst.next();
195 found_it = true;
196 }
197 } else if (last_caller != nullptr &&
198 last_caller->method_holder()->name() ==
199 vmSymbols::java_lang_ClassLoader() &&
200 last_caller->name() == vmSymbols::loadClass_name()) {
201 found_it = true;
202 } else if (!vfst.at_end()) {
203 if (vfst.method()->is_native()) {
204 // JNI call
205 found_it = true;
206 }
207 }
208 if (found_it && !vfst.at_end()) {
209 // found the caller
210 caller = vfst.method()->method_holder();
211 line_number = vfst.method()->line_number_from_bci(vfst.bci());
212 if (line_number == -1) {
213 // show method name if it's a native method
214 trace = vfst.method()->name_and_sig_as_C_string();
215 }
216 Symbol* s = caller->source_file_name();
217 if (s != nullptr) {
218 source_file = s->as_C_string();
219 }
220 }
221 }
222 if (caller != nullptr) {
223 if (to_class != caller) {
224 const char * from = caller->external_name();
225 const char * to = to_class->external_name();
226 // print in a single call to reduce interleaving between threads
227 if (source_file != nullptr) {
228 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
229 } else {
230 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
231 }
232 }
233 }
234 }
235
236 void trace_class_resolution(Klass* to_class) {
237 EXCEPTION_MARK;
238 trace_class_resolution_impl(to_class, THREAD);
239 if (HAS_PENDING_EXCEPTION) {
240 CLEAR_PENDING_EXCEPTION;
241 }
242 }
243
244 // java.lang.System //////////////////////////////////////////////////////////////////////
245
246
247 JVM_LEAF_PROF(jlong, JVM_CurrentTimeMillis, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
248 return os::javaTimeMillis();
249 JVM_END
250
251 JVM_LEAF_PROF(jlong, JVM_NanoTime, JVM_NanoTime(JNIEnv *env, jclass ignored))
252 return os::javaTimeNanos();
253 JVM_END
254
255 // The function below is actually exposed by jdk.internal.misc.VM and not
256 // java.lang.System, but we choose to keep it here so that it stays next
257 // to JVM_CurrentTimeMillis and JVM_NanoTime
258
259 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
260 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
261
262 JVM_LEAF_PROF(jlong, JVM_GetNanoTimeAdjustment, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
263 jlong seconds;
264 jlong nanos;
265
266 os::javaTimeSystemUTC(seconds, nanos);
267
268 // We're going to verify that the result can fit in a long.
269 // For that we need the difference in seconds between 'seconds'
270 // and 'offset_secs' to be such that:
271 // |seconds - offset_secs| < (2^63/10^9)
272 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
273 // which makes |seconds - offset_secs| < 2^33
274 // and we will prefer +/- 2^32 as the maximum acceptable diff
275 // as 2^32 has a more natural feel than 2^33...
276 //
277 // So if |seconds - offset_secs| >= 2^32 - we return a special
278 // sentinel value (-1) which the caller should take as an
279 // exception value indicating that the offset given to us is
280 // too far from range of the current time - leading to too big
281 // a nano adjustment. The caller is expected to recover by
282 // computing a more accurate offset and calling this method
283 // again. (For the record 2^32 secs is ~136 years, so that
284 // should rarely happen)
285 //
286 jlong diff = seconds - offset_secs;
287 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
288 return -1; // sentinel value: the offset is too far off the target
289 }
290
291 // return the adjustment. If you compute a time by adding
292 // this number of nanoseconds along with the number of seconds
293 // in the offset you should get the current UTC time.
294 return (diff * (jlong)1000000000) + nanos;
295 JVM_END
296
297 JVM_ENTRY_PROF(void, JVM_ArrayCopy, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 // Check if we have null pointers
300 if (src == nullptr || dst == nullptr) {
301 THROW(vmSymbols::java_lang_NullPointerException());
302 }
303 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
304 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
305 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
306 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
307 // Do copy
308 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
309 JVM_END
310
311
312 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
313 JavaValue r(T_OBJECT);
314 // public synchronized Object put(Object key, Object value);
315 HandleMark hm(THREAD);
316 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
317 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK);
318 JavaCalls::call_virtual(&r,
319 props,
320 vmClasses::Properties_klass(),
321 vmSymbols::put_name(),
322 vmSymbols::object_object_object_signature(),
323 key_str,
324 value_str,
325 THREAD);
326 }
327
328
329 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
330
331 /*
332 * Return all of the system properties in a Java String array with alternating
333 * names and values from the jvm SystemProperty.
334 * Which includes some internal and all commandline -D defined properties.
335 */
336 JVM_ENTRY_PROF(jobjectArray, JVM_GetProperties, JVM_GetProperties(JNIEnv *env))
337 ResourceMark rm(THREAD);
338 HandleMark hm(THREAD);
339 int ndx = 0;
340 int fixedCount = 2;
341
342 SystemProperty* p = Arguments::system_properties();
343 int count = Arguments::PropertyList_count(p);
344
345 // Allocate result String array
346 InstanceKlass* ik = vmClasses::String_klass();
347 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
348 objArrayHandle result_h(THREAD, r);
349
350 while (p != nullptr) {
351 const char * key = p->key();
352 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
353 const char * value = p->value();
354 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
355 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != nullptr ? value : ""), CHECK_NULL);
356 result_h->obj_at_put(ndx * 2, key_str());
357 result_h->obj_at_put(ndx * 2 + 1, value_str());
358 ndx++;
359 }
360 p = p->next();
361 }
362
363 // Convert the -XX:MaxDirectMemorySize= command line flag
364 // to the sun.nio.MaxDirectMemorySize property.
365 // Do this after setting user properties to prevent people
366 // from setting the value with a -D option, as requested.
367 // Leave empty if not supplied
368 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
369 char as_chars[256];
370 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
371 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
372 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
373 result_h->obj_at_put(ndx * 2, key_str());
374 result_h->obj_at_put(ndx * 2 + 1, value_str());
375 ndx++;
376 }
377
378 // JVM monitoring and management support
379 // Add the sun.management.compiler property for the compiler's name
380 {
381 #undef CSIZE
382 #if defined(_LP64) || defined(_WIN64)
383 #define CSIZE "64-Bit "
384 #else
385 #define CSIZE
386 #endif // 64bit
387
388 #if COMPILER1_AND_COMPILER2
389 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
390 #else
391 #if defined(COMPILER1)
392 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
393 #elif defined(COMPILER2)
394 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
395 #elif INCLUDE_JVMCI
396 #error "INCLUDE_JVMCI should imply COMPILER1_OR_COMPILER2"
397 #else
398 const char* compiler_name = "";
399 #endif // compilers
400 #endif // COMPILER1_AND_COMPILER2
401
402 if (*compiler_name != '\0' &&
403 (Arguments::mode() != Arguments::_int)) {
404 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
405 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
406 result_h->obj_at_put(ndx * 2, key_str());
407 result_h->obj_at_put(ndx * 2 + 1, value_str());
408 ndx++;
409 }
410 }
411
412 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
413 JVM_END
414
415
416 /*
417 * Return the temporary directory that the VM uses for the attach
418 * and perf data files.
419 *
420 * It is important that this directory is well-known and the
421 * same for all VM instances. It cannot be affected by configuration
422 * variables such as java.io.tmpdir.
423 */
424 JVM_ENTRY_PROF(jstring, JVM_GetTemporaryDirectory, JVM_GetTemporaryDirectory(JNIEnv *env))
425 HandleMark hm(THREAD);
426 const char* temp_dir = os::get_temp_directory();
427 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
428 return (jstring) JNIHandles::make_local(THREAD, h());
429 JVM_END
430
431
432 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
433
434 extern volatile jint vm_created;
435
436 JVM_ENTRY_NO_ENV_PROF(void, JVM_BeforeHalt, JVM_BeforeHalt())
437 EventShutdown event;
438 if (event.should_commit()) {
439 event.set_reason("Shutdown requested from Java");
440 event.commit();
441 }
442 JVM_END
443
444
445 JVM_ENTRY_NO_ENV_PROF(void, JVM_Halt, JVM_Halt(jint code))
446 before_exit(thread, true);
447 vm_exit(code);
448 JVM_END
449
450
451 JVM_ENTRY_NO_ENV_PROF(void, JVM_GC, JVM_GC(void))
452 if (!DisableExplicitGC) {
453 EventSystemGC event;
454 event.set_invokedConcurrent(ExplicitGCInvokesConcurrent);
455 Universe::heap()->collect(GCCause::_java_lang_system_gc);
456 event.commit();
457 }
458 JVM_END
459
460
461 JVM_LEAF_PROF(jlong, JVM_MaxObjectInspectionAge, JVM_MaxObjectInspectionAge(void))
462 return Universe::heap()->millis_since_last_whole_heap_examined();
463 JVM_END
464
465
466 static inline jlong convert_size_t_to_jlong(size_t val) {
467 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
468 NOT_LP64 (return (jlong)val;)
469 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
470 }
471
472 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_TotalMemory, JVM_TotalMemory(void))
473 size_t n = Universe::heap()->capacity();
474 return convert_size_t_to_jlong(n);
475 JVM_END
476
477
478 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_FreeMemory, JVM_FreeMemory(void))
479 size_t n = Universe::heap()->unused();
480 return convert_size_t_to_jlong(n);
481 JVM_END
482
483
484 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_MaxMemory, JVM_MaxMemory(void))
485 size_t n = Universe::heap()->max_capacity();
486 return convert_size_t_to_jlong(n);
487 JVM_END
488
489
490 JVM_ENTRY_NO_ENV_PROF(jint, JVM_ActiveProcessorCount, JVM_ActiveProcessorCount(void))
491 return os::active_processor_count();
492 JVM_END
493
494 JVM_LEAF_PROF(jboolean, JVM_IsUseContainerSupport, JVM_IsUseContainerSupport(void))
495 #ifdef LINUX
496 if (UseContainerSupport) {
497 return JNI_TRUE;
498 }
499 #endif
500 return JNI_FALSE;
501 JVM_END
502
503 JVM_LEAF(jboolean, JVM_IsContainerized(void))
504 #ifdef LINUX
505 if (OSContainer::is_containerized()) {
506 return JNI_TRUE;
507 }
508 #endif
509 return JNI_FALSE;
510 JVM_END
511
512 // java.lang.Throwable //////////////////////////////////////////////////////
513
514 JVM_ENTRY_PROF(void, JVM_FillInStackTrace, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
515 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
516 java_lang_Throwable::fill_in_stack_trace(exception);
517 JVM_END
518
519 // java.lang.NullPointerException ///////////////////////////////////////////
520
521 JVM_ENTRY_PROF(jstring, JVM_GetExtendedNPEMessage, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
522 if (!ShowCodeDetailsInExceptionMessages) return nullptr;
523
524 oop exc = JNIHandles::resolve_non_null(throwable);
525
526 Method* method;
527 int bci;
528 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
529 return nullptr;
530 }
531 if (method->is_native()) {
532 return nullptr;
533 }
534
535 stringStream ss;
536 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
537 if (ok) {
538 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
539 return (jstring) JNIHandles::make_local(THREAD, result);
540 } else {
541 return nullptr;
542 }
543 JVM_END
544
545 // java.lang.StackTraceElement //////////////////////////////////////////////
546
547
548 JVM_ENTRY_PROF(void, JVM_InitStackTraceElementArray, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject backtrace, jint depth))
549 Handle backtraceh(THREAD, JNIHandles::resolve(backtrace));
550 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
551 objArrayHandle stack_trace(THREAD, st);
552 // Fill in the allocated stack trace
553 java_lang_Throwable::get_stack_trace_elements(depth, backtraceh, stack_trace, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY_PROF(void, JVM_InitStackTraceElement, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
558 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
559 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
560 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, CHECK);
561 JVM_END
562
563
564 // java.lang.StackWalker //////////////////////////////////////////////////////
565 JVM_ENTRY_PROF(void, JVM_ExpandStackFrameInfo, JVM_ExpandStackFrameInfo(JNIEnv *env, jobject obj))
566 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(obj));
567
568 bool have_name = (java_lang_StackFrameInfo::name(stack_frame_info()) != nullptr);
569 bool have_type = (java_lang_StackFrameInfo::type(stack_frame_info()) != nullptr);
570 Method* method = java_lang_StackFrameInfo::get_method(stack_frame_info());
571 if (!have_name) {
572 oop name = StringTable::intern(method->name(), CHECK);
573 java_lang_StackFrameInfo::set_name(stack_frame_info(), name);
574 }
575 if (!have_type) {
576 Handle type = java_lang_String::create_from_symbol(method->signature(), CHECK);
577 java_lang_StackFrameInfo::set_type(stack_frame_info(), type());
578 }
579 JVM_END
580
581 JVM_ENTRY_PROF(jobject, JVM_CallStackWalk, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jint mode,
582 jint skip_frames, jobject contScope, jobject cont,
583 jint buffer_size, jint start_index, jobjectArray frames))
584 if (!thread->has_last_Java_frame()) {
585 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", nullptr);
586 }
587
588 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
589 Handle contScope_h(THREAD, JNIHandles::resolve(contScope));
590 Handle cont_h(THREAD, JNIHandles::resolve(cont));
591 // frames array is a ClassFrameInfo[] array when only getting caller reference,
592 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
593 // be null.
594 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
595 objArrayHandle frames_array_h(THREAD, fa);
596
597 if (frames_array_h->length() < buffer_size) {
598 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", nullptr);
599 }
600
601 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, contScope_h, cont_h,
602 buffer_size, start_index, frames_array_h, CHECK_NULL);
603 return JNIHandles::make_local(THREAD, result);
604 JVM_END
605
606
607 JVM_ENTRY_PROF(jint, JVM_MoreStackWalk, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jint mode, jlong anchor,
608 jint last_batch_count, jint buffer_size, jint start_index,
609 jobjectArray frames))
610 // frames array is a ClassFrameInfo[] array when only getting caller reference,
611 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
612 // be null.
613 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
614 objArrayHandle frames_array_h(THREAD, fa);
615
616 if (frames_array_h->length() < buffer_size) {
617 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
618 }
619
620 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
621 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, last_batch_count, buffer_size,
622 start_index, frames_array_h, THREAD);
623 JVM_END
624
625 JVM_ENTRY_PROF(void, JVM_SetStackWalkContinuation, JVM_SetStackWalkContinuation(JNIEnv *env, jobject stackStream, jlong anchor, jobjectArray frames, jobject cont))
626 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
627 objArrayHandle frames_array_h(THREAD, fa);
628 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
629 Handle cont_h(THREAD, JNIHandles::resolve_non_null(cont));
630
631 StackWalk::setContinuation(stackStream_h, anchor, frames_array_h, cont_h, THREAD);
632 JVM_END
633
634 // java.lang.Object ///////////////////////////////////////////////
635
636
637 JVM_ENTRY_PROF(jint, JVM_IHashCode, JVM_IHashCode(JNIEnv* env, jobject handle))
638 // as implemented in the classic virtual machine; return 0 if object is null
639 return handle == nullptr ? 0 :
640 checked_cast<jint>(ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)));
641 JVM_END
642
643
644 JVM_ENTRY_PROF(void, JVM_MonitorWait, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
645 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
646 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
647 if (JvmtiExport::should_post_monitor_wait()) {
648 JvmtiExport::post_monitor_wait(thread, obj(), ms);
649
650 // The current thread already owns the monitor and it has not yet
651 // been added to the wait queue so the current thread cannot be
652 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
653 // event handler cannot accidentally consume an unpark() meant for
654 // the ParkEvent associated with this ObjectMonitor.
655 }
656 ObjectSynchronizer::wait(obj, ms, CHECK);
657 JVM_END
658
659
660 JVM_ENTRY_PROF(void, JVM_MonitorNotify, JVM_MonitorNotify(JNIEnv* env, jobject handle))
661 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
662 ObjectSynchronizer::notify(obj, CHECK);
663 JVM_END
664
665
666 JVM_ENTRY_PROF(void, JVM_MonitorNotifyAll, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
667 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
668 ObjectSynchronizer::notifyall(obj, CHECK);
669 JVM_END
670
671
672 JVM_ENTRY_PROF(jobject, JVM_Clone, JVM_Clone(JNIEnv* env, jobject handle))
673 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
674 Klass* klass = obj->klass();
675 JvmtiVMObjectAllocEventCollector oam;
676
677 #ifdef ASSERT
678 // Just checking that the cloneable flag is set correct
679 if (obj->is_array()) {
680 guarantee(klass->is_cloneable(), "all arrays are cloneable");
681 } else {
682 guarantee(obj->is_instance(), "should be instanceOop");
683 bool cloneable = klass->is_subtype_of(vmClasses::Cloneable_klass());
684 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
685 }
686 #endif
687
688 // Check if class of obj supports the Cloneable interface.
689 // All arrays are considered to be cloneable (See JLS 20.1.5).
690 // All j.l.r.Reference classes are considered non-cloneable.
691 if (!klass->is_cloneable() ||
692 (klass->is_instance_klass() &&
693 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
694 ResourceMark rm(THREAD);
695 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
696 }
697
698 // Make shallow object copy
699 const size_t size = obj->size();
700 oop new_obj_oop = nullptr;
701 if (obj->is_array()) {
702 const int length = ((arrayOop)obj())->length();
703 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
704 /* do_zero */ true, CHECK_NULL);
705 } else {
706 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
707 }
708
709 HeapAccess<>::clone(obj(), new_obj_oop, size);
710
711 Handle new_obj(THREAD, new_obj_oop);
712 // Caution: this involves a java upcall, so the clone should be
713 // "gc-robust" by this stage.
714 if (klass->has_finalizer()) {
715 assert(obj->is_instance(), "should be instanceOop");
716 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
717 new_obj = Handle(THREAD, new_obj_oop);
718 }
719
720 return JNIHandles::make_local(THREAD, new_obj());
721 JVM_END
722
723 // java.lang.ref.Finalizer ////////////////////////////////////////////////////
724
725 JVM_ENTRY_PROF(void, JVM_ReportFinalizationComplete, JVM_ReportFinalizationComplete(JNIEnv * env, jobject finalizee))
726 MANAGEMENT_ONLY(FinalizerService::on_complete(JNIHandles::resolve_non_null(finalizee), THREAD);)
727 JVM_END
728
729 JVM_LEAF_PROF(jboolean, JVM_IsFinalizationEnabled, JVM_IsFinalizationEnabled(JNIEnv * env))
730 return InstanceKlass::is_finalization_enabled();
731 JVM_END
732
733 // jdk.internal.vm.Continuation /////////////////////////////////////////////////////
734
735 JVM_ENTRY_PROF(void, JVM_RegisterContinuationMethods, JVM_RegisterContinuationMethods(JNIEnv *env, jclass cls))
736 CONT_RegisterNativeMethods(env, cls);
737 JVM_END
738
739 // java.io.File ///////////////////////////////////////////////////////////////
740
741 JVM_LEAF_PROF(char*, JVM_NativePath, JVM_NativePath(char* path))
742 return os::native_path(path);
743 JVM_END
744
745
746 // Misc. class handling ///////////////////////////////////////////////////////////
747
748
749 JVM_ENTRY_PROF(jclass, JVM_GetCallerClass, JVM_GetCallerClass(JNIEnv* env))
750 // Getting the class of the caller frame.
751 //
752 // The call stack at this point looks something like this:
753 //
754 // [0] [ @CallerSensitive public jdk.internal.reflect.Reflection.getCallerClass ]
755 // [1] [ @CallerSensitive API.method ]
756 // [.] [ (skipped intermediate frames) ]
757 // [n] [ caller ]
758 vframeStream vfst(thread);
759 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
760 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
761 Method* m = vfst.method();
762 assert(m != nullptr, "sanity");
763 switch (n) {
764 case 0:
765 // This must only be called from Reflection.getCallerClass
766 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
767 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
768 }
769 // fall-through
770 case 1:
771 // Frame 0 and 1 must be caller sensitive.
772 if (!m->caller_sensitive()) {
773 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
774 }
775 break;
776 default:
777 if (!m->is_ignored_by_security_stack_walk()) {
778 // We have reached the desired frame; return the holder class.
779 return (jclass) JNIHandles::make_local(THREAD, m->method_holder()->java_mirror());
780 }
781 break;
782 }
783 }
784 return nullptr;
785 JVM_END
786
787
788 JVM_ENTRY_PROF(jclass, JVM_FindPrimitiveClass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
789 oop mirror = nullptr;
790 BasicType t = name2type(utf);
791 if (t != T_ILLEGAL && !is_reference_type(t)) {
792 mirror = Universe::java_mirror(t);
793 }
794 if (mirror == nullptr) {
795 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
796 } else {
797 return (jclass) JNIHandles::make_local(THREAD, mirror);
798 }
799 JVM_END
800
801
802 // Returns a class loaded by the bootstrap class loader; or null
803 // if not found. ClassNotFoundException is not thrown.
804 // FindClassFromBootLoader is exported to the launcher for windows.
805 JVM_ENTRY_PROF(jclass, JVM_FindClassFromBootLoader, JVM_FindClassFromBootLoader(JNIEnv* env, const char* name))
806 // Java libraries should ensure that name is never null or illegal.
807 if (name == nullptr || (int)strlen(name) > Symbol::max_length()) {
808 // It's impossible to create this class; the name cannot fit
809 // into the constant pool.
810 return nullptr;
811 }
812 assert(UTF8::is_legal_utf8((const unsigned char*)name, (int)strlen(name), false), "illegal UTF name");
813
814 TempNewSymbol h_name = SymbolTable::new_symbol(name);
815 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
816 if (k == nullptr) {
817 return nullptr;
818 }
819
820 if (log_is_enabled(Debug, class, resolve)) {
821 trace_class_resolution(k);
822 }
823 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
824 JVM_END
825
826 // Find a class with this name in this loader, using the caller's protection domain.
827 JVM_ENTRY_PROF(jclass, JVM_FindClassFromCaller, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
828 jboolean init, jobject loader,
829 jclass caller))
830 TempNewSymbol h_name =
831 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
832 CHECK_NULL);
833
834 oop loader_oop = JNIHandles::resolve(loader);
835 oop from_class = JNIHandles::resolve(caller);
836 oop protection_domain = nullptr;
837 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
838 // NPE. Put it in another way, the bootstrap class loader has all permission and
839 // thus no checkPackageAccess equivalence in the VM class loader.
840 // The caller is also passed as null by the java code if there is no security
841 // manager to avoid the performance cost of getting the calling class.
842 if (from_class != nullptr && loader_oop != nullptr) {
843 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
844 }
845
846 Handle h_loader(THREAD, loader_oop);
847 Handle h_prot(THREAD, protection_domain);
848 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
849 h_prot, false, THREAD);
850
851 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
852 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
853 }
854 return result;
855 JVM_END
856
857 // Currently only called from the old verifier.
858 JVM_ENTRY_PROF(jclass, JVM_FindClassFromClass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
859 jboolean init, jclass from))
860 TempNewSymbol h_name =
861 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_ClassNotFoundException(),
862 CHECK_NULL);
863 oop from_class_oop = JNIHandles::resolve(from);
864 Klass* from_class = (from_class_oop == nullptr)
865 ? (Klass*)nullptr
866 : java_lang_Class::as_Klass(from_class_oop);
867 oop class_loader = nullptr;
868 oop protection_domain = nullptr;
869 if (from_class != nullptr) {
870 class_loader = from_class->class_loader();
871 protection_domain = from_class->protection_domain();
872 }
873 Handle h_loader(THREAD, class_loader);
874 Handle h_prot (THREAD, protection_domain);
875 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
876 h_prot, true, thread);
877
878 if (log_is_enabled(Debug, class, resolve) && result != nullptr) {
879 // this function is generally only used for class loading during verification.
880 ResourceMark rm;
881 oop from_mirror = JNIHandles::resolve_non_null(from);
882 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
883 const char * from_name = from_class->external_name();
884
885 oop mirror = JNIHandles::resolve_non_null(result);
886 Klass* to_class = java_lang_Class::as_Klass(mirror);
887 const char * to = to_class->external_name();
888 log_debug(class, resolve)("%s %s (verification)", from_name, to);
889 }
890
891 return result;
892 JVM_END
893
894 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
895 static jclass jvm_define_class_common(const char *name,
896 jobject loader, const jbyte *buf,
897 jsize len, jobject pd, const char *source,
898 TRAPS) {
899 if (source == nullptr) source = "__JVM_DefineClass__";
900
901 JavaThread* jt = THREAD;
902
903 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
904 ClassLoader::perf_define_appclass_selftime(),
905 ClassLoader::perf_define_appclasses(),
906 jt->get_thread_stat()->perf_recursion_counts_addr(),
907 jt->get_thread_stat()->perf_timers_addr(),
908 PerfClassTraceTime::DEFINE_CLASS);
909
910 if (UsePerfData) {
911 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
912 }
913
914 // Class resolution will get the class name from the .class stream if the name is null.
915 TempNewSymbol class_name = name == nullptr ? nullptr :
916 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
917 CHECK_NULL);
918
919 ResourceMark rm(THREAD);
920 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
921 Handle class_loader (THREAD, JNIHandles::resolve(loader));
922 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
923 ClassLoadInfo cl_info(protection_domain);
924 Klass* k = SystemDictionary::resolve_from_stream(&st, class_name,
925 class_loader,
926 cl_info,
927 CHECK_NULL);
928
929 if (log_is_enabled(Debug, class, resolve)) {
930 trace_class_resolution(k);
931 }
932
933 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
934 }
935
936 enum {
937 NESTMATE = java_lang_invoke_MemberName::MN_NESTMATE_CLASS,
938 HIDDEN_CLASS = java_lang_invoke_MemberName::MN_HIDDEN_CLASS,
939 STRONG_LOADER_LINK = java_lang_invoke_MemberName::MN_STRONG_LOADER_LINK,
940 ACCESS_VM_ANNOTATIONS = java_lang_invoke_MemberName::MN_ACCESS_VM_ANNOTATIONS
941 };
942
943 /*
944 * Define a class with the specified flags that indicates if it's a nestmate,
945 * hidden, or strongly referenced from class loader.
946 */
947 static jclass jvm_lookup_define_class(jclass lookup, const char *name,
948 const jbyte *buf, jsize len, jobject pd,
949 jboolean init, int flags, jobject classData, TRAPS) {
950 ResourceMark rm(THREAD);
951
952 Klass* lookup_k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(lookup));
953 // Lookup class must be a non-null instance
954 if (lookup_k == nullptr) {
955 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
956 }
957 assert(lookup_k->is_instance_klass(), "Lookup class must be an instance klass");
958
959 Handle class_loader (THREAD, lookup_k->class_loader());
960
961 bool is_nestmate = (flags & NESTMATE) == NESTMATE;
962 bool is_hidden = (flags & HIDDEN_CLASS) == HIDDEN_CLASS;
963 bool is_strong = (flags & STRONG_LOADER_LINK) == STRONG_LOADER_LINK;
964 bool vm_annotations = (flags & ACCESS_VM_ANNOTATIONS) == ACCESS_VM_ANNOTATIONS;
965
966 InstanceKlass* host_class = nullptr;
967 if (is_nestmate) {
968 host_class = InstanceKlass::cast(lookup_k)->nest_host(CHECK_NULL);
969 }
970
971 log_info(class, nestmates)("LookupDefineClass: %s - %s%s, %s, %s, %s",
972 name,
973 is_nestmate ? "with dynamic nest-host " : "non-nestmate",
974 is_nestmate ? host_class->external_name() : "",
975 is_hidden ? "hidden" : "not hidden",
976 is_strong ? "strong" : "weak",
977 vm_annotations ? "with vm annotations" : "without vm annotation");
978
979 if (!is_hidden) {
980 // classData is only applicable for hidden classes
981 if (classData != nullptr) {
982 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "classData is only applicable for hidden classes");
983 }
984 if (is_nestmate) {
985 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "dynamic nestmate is only applicable for hidden classes");
986 }
987 if (!is_strong) {
988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "an ordinary class must be strongly referenced by its defining loader");
989 }
990 if (vm_annotations) {
991 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "vm annotations only allowed for hidden classes");
992 }
993 if (flags != STRONG_LOADER_LINK) {
994 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
995 err_msg("invalid flag 0x%x", flags));
996 }
997 }
998
999 // Class resolution will get the class name from the .class stream if the name is null.
1000 TempNewSymbol class_name = name == nullptr ? nullptr :
1001 SystemDictionary::class_name_symbol(name, vmSymbols::java_lang_NoClassDefFoundError(),
1002 CHECK_NULL);
1003
1004 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1005 const char* source = is_nestmate ? host_class->external_name() : "__JVM_LookupDefineClass__";
1006 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
1007
1008 InstanceKlass* ik = nullptr;
1009 if (!is_hidden) {
1010 ClassLoadInfo cl_info(protection_domain);
1011 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1012 class_loader,
1013 cl_info,
1014 CHECK_NULL);
1015
1016 if (log_is_enabled(Debug, class, resolve)) {
1017 trace_class_resolution(ik);
1018 }
1019 } else { // hidden
1020 Handle classData_h(THREAD, JNIHandles::resolve(classData));
1021 ClassLoadInfo cl_info(protection_domain,
1022 host_class,
1023 classData_h,
1024 is_hidden,
1025 is_strong,
1026 vm_annotations);
1027 ik = SystemDictionary::resolve_from_stream(&st, class_name,
1028 class_loader,
1029 cl_info,
1030 CHECK_NULL);
1031
1032 // The hidden class loader data has been artificially been kept alive to
1033 // this point. The mirror and any instances of this class have to keep
1034 // it alive afterwards.
1035 ik->class_loader_data()->dec_keep_alive();
1036
1037 if (is_nestmate && log_is_enabled(Debug, class, nestmates)) {
1038 ModuleEntry* module = ik->module();
1039 const char * module_name = module->is_named() ? module->name()->as_C_string() : UNNAMED_MODULE;
1040 log_debug(class, nestmates)("Dynamic nestmate: %s/%s, nest_host %s, %s",
1041 module_name,
1042 ik->external_name(),
1043 host_class->external_name(),
1044 ik->is_hidden() ? "is hidden" : "is not hidden");
1045 }
1046 }
1047
1048 if ((!is_hidden || is_nestmate) && !Reflection::is_same_class_package(lookup_k, ik)) {
1049 // non-hidden class or nestmate class must be in the same package as the Lookup class
1050 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class and defined class are in different packages");
1051 }
1052
1053 if (init) {
1054 ik->initialize(CHECK_NULL);
1055 } else {
1056 ik->link_class(CHECK_NULL);
1057 }
1058
1059 return (jclass) JNIHandles::make_local(THREAD, ik->java_mirror());
1060 }
1061
1062 JVM_ENTRY_PROF(jclass, JVM_DefineClass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1063 return jvm_define_class_common(name, loader, buf, len, pd, nullptr, THREAD);
1064 JVM_END
1065
1066 /*
1067 * Define a class with the specified lookup class.
1068 * lookup: Lookup class
1069 * name: the name of the class
1070 * buf: class bytes
1071 * len: length of class bytes
1072 * pd: protection domain
1073 * init: initialize the class
1074 * flags: properties of the class
1075 * classData: private static pre-initialized field
1076 */
1077 JVM_ENTRY_PROF(jclass, JVM_LookupDefineClass, JVM_LookupDefineClass(JNIEnv *env, jclass lookup, const char *name, const jbyte *buf,
1078 jsize len, jobject pd, jboolean initialize, int flags, jobject classData))
1079
1080 if (lookup == nullptr) {
1081 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Lookup class is null");
1082 }
1083
1084 assert(buf != nullptr, "buf must not be null");
1085
1086 return jvm_lookup_define_class(lookup, name, buf, len, pd, initialize, flags, classData, THREAD);
1087 JVM_END
1088
1089 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))
1090 return jvm_define_class_common(name, loader, buf, len, pd, source, THREAD);
1091 JVM_END
1092
1093 JVM_ENTRY_PROF(jclass, JVM_FindLoadedClass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1094 ResourceMark rm(THREAD);
1095
1096 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1097 char* str = java_lang_String::as_utf8_string(h_name());
1098
1099 // Sanity check, don't expect null
1100 if (str == nullptr) return nullptr;
1101
1102 // Internalize the string, converting '.' to '/' in string.
1103 char* p = (char*)str;
1104 while (*p != '\0') {
1105 if (*p == '.') {
1106 *p = '/';
1107 }
1108 p++;
1109 }
1110
1111 const int str_len = (int)(p - str);
1112 if (str_len > Symbol::max_length()) {
1113 // It's impossible to create this class; the name cannot fit
1114 // into the constant pool.
1115 return nullptr;
1116 }
1117 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1118
1119 // Security Note:
1120 // The Java level wrapper will perform the necessary security check allowing
1121 // us to pass the null as the initiating class loader.
1122 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1123 Klass* k = SystemDictionary::find_instance_or_array_klass(THREAD, klass_name,
1124 h_loader,
1125 Handle());
1126 #if INCLUDE_CDS
1127 if (k == nullptr) {
1128 // If the class is not already loaded, try to see if it's in the shared
1129 // archive for the current classloader (h_loader).
1130 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1131 }
1132 #endif
1133 return (k == nullptr) ? nullptr :
1134 (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
1135 JVM_END
1136
1137 // Module support //////////////////////////////////////////////////////////////////////////////
1138
1139 JVM_ENTRY_PROF(void, JVM_DefineModule, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1140 jstring location, jobjectArray packages))
1141 Handle h_module (THREAD, JNIHandles::resolve(module));
1142 Modules::define_module(h_module, is_open, version, location, packages, CHECK);
1143 JVM_END
1144
1145 JVM_ENTRY_PROF(void, JVM_SetBootLoaderUnnamedModule, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1146 Handle h_module (THREAD, JNIHandles::resolve(module));
1147 Modules::set_bootloader_unnamed_module(h_module, CHECK);
1148 JVM_END
1149
1150 JVM_ENTRY_PROF(void, JVM_AddModuleExports, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1151 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1152 Handle h_to_module (THREAD, JNIHandles::resolve(to_module));
1153 Modules::add_module_exports_qualified(h_from_module, package, h_to_module, CHECK);
1154 JVM_END
1155
1156 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAllUnnamed, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1157 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1158 Modules::add_module_exports_to_all_unnamed(h_from_module, package, CHECK);
1159 JVM_END
1160
1161 JVM_ENTRY_PROF(void, JVM_AddModuleExportsToAll, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1162 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1163 Modules::add_module_exports(h_from_module, package, Handle(), CHECK);
1164 JVM_END
1165
1166 JVM_ENTRY_PROF(void, JVM_AddReadsModule, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1167 Handle h_from_module (THREAD, JNIHandles::resolve(from_module));
1168 Handle h_source_module (THREAD, JNIHandles::resolve(source_module));
1169 Modules::add_reads_module(h_from_module, h_source_module, CHECK);
1170 JVM_END
1171
1172 JVM_ENTRY_PROF(void, JVM_DefineArchivedModules, JVM_DefineArchivedModules(JNIEnv *env, jobject platform_loader, jobject system_loader))
1173 Handle h_platform_loader (THREAD, JNIHandles::resolve(platform_loader));
1174 Handle h_system_loader (THREAD, JNIHandles::resolve(system_loader));
1175 Modules::define_archived_modules(h_platform_loader, h_system_loader, CHECK);
1176 JVM_END
1177
1178 // Reflection support //////////////////////////////////////////////////////////////////////////////
1179
1180 JVM_ENTRY_PROF(jstring, JVM_InitClassName, JVM_InitClassName(JNIEnv *env, jclass cls))
1181 assert (cls != nullptr, "illegal class");
1182 JvmtiVMObjectAllocEventCollector oam;
1183 ResourceMark rm(THREAD);
1184 HandleMark hm(THREAD);
1185 Handle java_class(THREAD, JNIHandles::resolve(cls));
1186 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1187 return (jstring) JNIHandles::make_local(THREAD, result);
1188 JVM_END
1189
1190
1191 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassInterfaces, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1192 JvmtiVMObjectAllocEventCollector oam;
1193 oop mirror = JNIHandles::resolve_non_null(cls);
1194
1195 // Special handling for primitive objects
1196 if (java_lang_Class::is_primitive(mirror)) {
1197 // Primitive objects does not have any interfaces
1198 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1199 return (jobjectArray) JNIHandles::make_local(THREAD, r);
1200 }
1201
1202 Klass* klass = java_lang_Class::as_Klass(mirror);
1203 // Figure size of result array
1204 int size;
1205 if (klass->is_instance_klass()) {
1206 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1207 } else {
1208 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1209 size = 2;
1210 }
1211
1212 // Allocate result array
1213 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), size, CHECK_NULL);
1214 objArrayHandle result (THREAD, r);
1215 // Fill in result
1216 if (klass->is_instance_klass()) {
1217 // Regular instance klass, fill in all local interfaces
1218 for (int index = 0; index < size; index++) {
1219 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1220 result->obj_at_put(index, k->java_mirror());
1221 }
1222 } else {
1223 // All arrays implement java.lang.Cloneable and java.io.Serializable
1224 result->obj_at_put(0, vmClasses::Cloneable_klass()->java_mirror());
1225 result->obj_at_put(1, vmClasses::Serializable_klass()->java_mirror());
1226 }
1227 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1228 JVM_END
1229
1230
1231 JVM_ENTRY_PROF(jboolean, JVM_IsInterface, JVM_IsInterface(JNIEnv *env, jclass cls))
1232 oop mirror = JNIHandles::resolve_non_null(cls);
1233 if (java_lang_Class::is_primitive(mirror)) {
1234 return JNI_FALSE;
1235 }
1236 Klass* k = java_lang_Class::as_Klass(mirror);
1237 jboolean result = k->is_interface();
1238 assert(!result || k->is_instance_klass(),
1239 "all interfaces are instance types");
1240 // The compiler intrinsic for isInterface tests the
1241 // Klass::_access_flags bits in the same way.
1242 return result;
1243 JVM_END
1244
1245 JVM_ENTRY_PROF(jboolean, JVM_IsHiddenClass, JVM_IsHiddenClass(JNIEnv *env, jclass cls))
1246 oop mirror = JNIHandles::resolve_non_null(cls);
1247 if (java_lang_Class::is_primitive(mirror)) {
1248 return JNI_FALSE;
1249 }
1250 Klass* k = java_lang_Class::as_Klass(mirror);
1251 return k->is_hidden();
1252 JVM_END
1253
1254 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassSigners, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1255 JvmtiVMObjectAllocEventCollector oam;
1256 oop mirror = JNIHandles::resolve_non_null(cls);
1257 if (java_lang_Class::is_primitive(mirror)) {
1258 // There are no signers for primitive types
1259 return nullptr;
1260 }
1261
1262 objArrayHandle signers(THREAD, java_lang_Class::signers(mirror));
1263
1264 // If there are no signers set in the class, or if the class
1265 // is an array, return null.
1266 if (signers == nullptr) return nullptr;
1267
1268 // copy of the signers array
1269 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1270 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1271 for (int index = 0; index < signers->length(); index++) {
1272 signers_copy->obj_at_put(index, signers->obj_at(index));
1273 }
1274
1275 // return the copy
1276 return (jobjectArray) JNIHandles::make_local(THREAD, signers_copy);
1277 JVM_END
1278
1279
1280 JVM_ENTRY_PROF(void, JVM_SetClassSigners, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1281 oop mirror = JNIHandles::resolve_non_null(cls);
1282 if (!java_lang_Class::is_primitive(mirror)) {
1283 // This call is ignored for primitive types and arrays.
1284 // Signers are only set once, ClassLoader.java, and thus shouldn't
1285 // be called with an array. Only the bootstrap loader creates arrays.
1286 Klass* k = java_lang_Class::as_Klass(mirror);
1287 if (k->is_instance_klass()) {
1288 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1289 }
1290 }
1291 JVM_END
1292
1293
1294 JVM_ENTRY_PROF(jobject, JVM_GetProtectionDomain, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1295 oop mirror = JNIHandles::resolve_non_null(cls);
1296 if (mirror == nullptr) {
1297 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
1298 }
1299
1300 if (java_lang_Class::is_primitive(mirror)) {
1301 // Primitive types does not have a protection domain.
1302 return nullptr;
1303 }
1304
1305 oop pd = java_lang_Class::protection_domain(mirror);
1306 return (jobject) JNIHandles::make_local(THREAD, pd);
1307 JVM_END
1308
1309
1310 // Returns the inherited_access_control_context field of the running thread.
1311 JVM_ENTRY_PROF(jobject, JVM_GetInheritedAccessControlContext, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1312 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1313 return JNIHandles::make_local(THREAD, result);
1314 JVM_END
1315
1316 JVM_ENTRY_PROF(jobject, JVM_GetStackAccessControlContext, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1317 if (!UsePrivilegedStack) return nullptr;
1318
1319 ResourceMark rm(THREAD);
1320 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1321 JvmtiVMObjectAllocEventCollector oam;
1322
1323 // count the protection domains on the execution stack. We collapse
1324 // duplicate consecutive protection domains into a single one, as
1325 // well as stopping when we hit a privileged frame.
1326
1327 oop previous_protection_domain = nullptr;
1328 Handle privileged_context(thread, nullptr);
1329 bool is_privileged = false;
1330 oop protection_domain = nullptr;
1331
1332 // Iterate through Java frames
1333 vframeStream vfst(thread);
1334 for(; !vfst.at_end(); vfst.next()) {
1335 // get method of frame
1336 Method* method = vfst.method();
1337
1338 // stop at the first privileged frame
1339 if (method->method_holder() == vmClasses::AccessController_klass() &&
1340 method->name() == vmSymbols::executePrivileged_name())
1341 {
1342 // this frame is privileged
1343 is_privileged = true;
1344
1345 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1346
1347 StackValueCollection* locals = priv->locals();
1348 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1349 StackValue* clr_sv = locals->at(2); // Class<?> caller
1350 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1351 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1352 privileged_context = ctx_sv->get_obj();
1353 Handle caller = clr_sv->get_obj();
1354
1355 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1356 protection_domain = caller_klass->protection_domain();
1357 } else {
1358 protection_domain = method->method_holder()->protection_domain();
1359 }
1360
1361 if ((previous_protection_domain != protection_domain) && (protection_domain != nullptr)) {
1362 local_array->push(Handle(thread, protection_domain));
1363 previous_protection_domain = protection_domain;
1364 }
1365
1366 if (is_privileged) break;
1367 }
1368
1369
1370 // either all the domains on the stack were system domains, or
1371 // we had a privileged system domain
1372 if (local_array->is_empty()) {
1373 if (is_privileged && privileged_context.is_null()) return nullptr;
1374
1375 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1376 return JNIHandles::make_local(THREAD, result);
1377 }
1378
1379 objArrayOop context = oopFactory::new_objArray(vmClasses::ProtectionDomain_klass(),
1380 local_array->length(), CHECK_NULL);
1381 objArrayHandle h_context(thread, context);
1382 for (int index = 0; index < local_array->length(); index++) {
1383 h_context->obj_at_put(index, local_array->at(index)());
1384 }
1385
1386 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1387
1388 return JNIHandles::make_local(THREAD, result);
1389 JVM_END
1390
1391 class ScopedValueBindingsResolver {
1392 public:
1393 InstanceKlass* Carrier_klass;
1394 ScopedValueBindingsResolver(JavaThread* THREAD) {
1395 Klass *k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ScopedValue_Carrier(), true, THREAD);
1396 Carrier_klass = InstanceKlass::cast(k);
1397 }
1398 };
1399
1400 JVM_ENTRY_PROF(jobject, JVM_FindScopedValueBindings, JVM_FindScopedValueBindings(JNIEnv *env, jclass cls))
1401 ResourceMark rm(THREAD);
1402 GrowableArray<Handle>* local_array = new GrowableArray<Handle>(12);
1403 JvmtiVMObjectAllocEventCollector oam;
1404
1405 static ScopedValueBindingsResolver resolver(THREAD);
1406
1407 // Iterate through Java frames
1408 vframeStream vfst(thread);
1409 for(; !vfst.at_end(); vfst.next()) {
1410 int loc = -1;
1411 // get method of frame
1412 Method* method = vfst.method();
1413
1414 Symbol *name = method->name();
1415
1416 InstanceKlass* holder = method->method_holder();
1417 if (name == vmSymbols::runWith_method_name()) {
1418 if (holder == vmClasses::Thread_klass()
1419 || holder == resolver.Carrier_klass) {
1420 loc = 1;
1421 }
1422 }
1423
1424 if (loc != -1) {
1425 javaVFrame *frame = vfst.asJavaVFrame();
1426 StackValueCollection* locals = frame->locals();
1427 StackValue* head_sv = locals->at(loc); // java/lang/ScopedValue$Snapshot
1428 Handle result = head_sv->get_obj();
1429 assert(!head_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1430 if (result() != nullptr) {
1431 return JNIHandles::make_local(THREAD, result());
1432 }
1433 }
1434 }
1435
1436 return nullptr;
1437 JVM_END
1438
1439 JVM_ENTRY_PROF(jboolean, JVM_IsArrayClass, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1441 return (k != nullptr) && k->is_array_klass() ? true : false;
1442 JVM_END
1443
1444
1445 JVM_ENTRY_PROF(jboolean, JVM_IsPrimitiveClass, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1446 oop mirror = JNIHandles::resolve_non_null(cls);
1447 return (jboolean) java_lang_Class::is_primitive(mirror);
1448 JVM_END
1449
1450
1451 JVM_ENTRY_PROF(jint, JVM_GetClassModifiers, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1452 oop mirror = JNIHandles::resolve_non_null(cls);
1453 if (java_lang_Class::is_primitive(mirror)) {
1454 // Primitive type
1455 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1456 }
1457
1458 Klass* k = java_lang_Class::as_Klass(mirror);
1459 debug_only(int computed_modifiers = k->compute_modifier_flags());
1460 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1461 return k->modifier_flags();
1462 JVM_END
1463
1464
1465 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1466
1467 JVM_ENTRY_PROF(jobjectArray, JVM_GetDeclaredClasses, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1468 JvmtiVMObjectAllocEventCollector oam;
1469 // ofClass is a reference to a java_lang_Class object. The mirror object
1470 // of an InstanceKlass
1471 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1472 if (java_lang_Class::is_primitive(ofMirror) ||
1473 ! java_lang_Class::as_Klass(ofMirror)->is_instance_klass()) {
1474 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1475 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1476 }
1477
1478 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1479 InnerClassesIterator iter(k);
1480
1481 if (iter.length() == 0) {
1482 // Neither an inner nor outer class
1483 oop result = oopFactory::new_objArray(vmClasses::Class_klass(), 0, CHECK_NULL);
1484 return (jobjectArray)JNIHandles::make_local(THREAD, result);
1485 }
1486
1487 // find inner class info
1488 constantPoolHandle cp(thread, k->constants());
1489 int length = iter.length();
1490
1491 // Allocate temp. result array
1492 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(), length/4, CHECK_NULL);
1493 objArrayHandle result (THREAD, r);
1494 int members = 0;
1495
1496 for (; !iter.done(); iter.next()) {
1497 int ioff = iter.inner_class_info_index();
1498 int ooff = iter.outer_class_info_index();
1499
1500 if (ioff != 0 && ooff != 0) {
1501 // Check to see if the name matches the class we're looking for
1502 // before attempting to find the class.
1503 if (cp->klass_name_at_matches(k, ooff)) {
1504 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1505 if (outer_klass == k) {
1506 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1507 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1508
1509 // Throws an exception if outer klass has not declared k as
1510 // an inner klass
1511 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1512
1513 result->obj_at_put(members, inner_klass->java_mirror());
1514 members++;
1515 }
1516 }
1517 }
1518 }
1519
1520 if (members != length) {
1521 // Return array of right length
1522 objArrayOop res = oopFactory::new_objArray(vmClasses::Class_klass(), members, CHECK_NULL);
1523 for(int i = 0; i < members; i++) {
1524 res->obj_at_put(i, result->obj_at(i));
1525 }
1526 return (jobjectArray)JNIHandles::make_local(THREAD, res);
1527 }
1528
1529 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1530 JVM_END
1531
1532
1533 JVM_ENTRY_PROF(jclass, JVM_GetDeclaringClass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1534 {
1535 // ofClass is a reference to a java_lang_Class object.
1536 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1537 if (java_lang_Class::is_primitive(ofMirror)) {
1538 return nullptr;
1539 }
1540 Klass* klass = java_lang_Class::as_Klass(ofMirror);
1541 if (!klass->is_instance_klass()) {
1542 return nullptr;
1543 }
1544
1545 bool inner_is_member = false;
1546 Klass* outer_klass
1547 = InstanceKlass::cast(klass)->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1548 if (outer_klass == nullptr) return nullptr; // already a top-level class
1549 if (!inner_is_member) return nullptr; // a hidden class (inside a method)
1550 return (jclass) JNIHandles::make_local(THREAD, outer_klass->java_mirror());
1551 }
1552 JVM_END
1553
1554 JVM_ENTRY_PROF(jstring, JVM_GetSimpleBinaryName, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1555 {
1556 oop mirror = JNIHandles::resolve_non_null(cls);
1557 if (java_lang_Class::is_primitive(mirror)) {
1558 return nullptr;
1559 }
1560 Klass* klass = java_lang_Class::as_Klass(mirror);
1561 if (!klass->is_instance_klass()) {
1562 return nullptr;
1563 }
1564 InstanceKlass* k = InstanceKlass::cast(klass);
1565 int ooff = 0, noff = 0;
1566 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1567 if (noff != 0) {
1568 constantPoolHandle i_cp(thread, k->constants());
1569 Symbol* name = i_cp->symbol_at(noff);
1570 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1571 return (jstring) JNIHandles::make_local(THREAD, str());
1572 }
1573 }
1574 return nullptr;
1575 }
1576 JVM_END
1577
1578 JVM_ENTRY_PROF(jstring, JVM_GetClassSignature, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1579 assert (cls != nullptr, "illegal class");
1580 JvmtiVMObjectAllocEventCollector oam;
1581 ResourceMark rm(THREAD);
1582 oop mirror = JNIHandles::resolve_non_null(cls);
1583 // Return null for arrays and primitives
1584 if (!java_lang_Class::is_primitive(mirror)) {
1585 Klass* k = java_lang_Class::as_Klass(mirror);
1586 if (k->is_instance_klass()) {
1587 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1588 if (sym == nullptr) return nullptr;
1589 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1590 return (jstring) JNIHandles::make_local(THREAD, str());
1591 }
1592 }
1593 return nullptr;
1594 JVM_END
1595
1596
1597 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassAnnotations, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1598 assert (cls != nullptr, "illegal class");
1599 oop mirror = JNIHandles::resolve_non_null(cls);
1600 // Return null for arrays and primitives
1601 if (!java_lang_Class::is_primitive(mirror)) {
1602 Klass* k = java_lang_Class::as_Klass(mirror);
1603 if (k->is_instance_klass()) {
1604 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1605 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1606 }
1607 }
1608 return nullptr;
1609 JVM_END
1610
1611
1612 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd) {
1613 // some of this code was adapted from from jni_FromReflectedField
1614
1615 oop reflected = JNIHandles::resolve_non_null(field);
1616 oop mirror = java_lang_reflect_Field::clazz(reflected);
1617 Klass* k = java_lang_Class::as_Klass(mirror);
1618 int slot = java_lang_reflect_Field::slot(reflected);
1619 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1620
1621 InstanceKlass* ik = InstanceKlass::cast(k);
1622 int offset = ik->field_offset(slot);
1623
1624 if (modifiers & JVM_ACC_STATIC) {
1625 // for static fields we only look in the current class
1626 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1627 assert(false, "cannot find static field");
1628 return false;
1629 }
1630 } else {
1631 // for instance fields we start with the current class and work
1632 // our way up through the superclass chain
1633 if (!ik->find_field_from_offset(offset, false, &fd)) {
1634 assert(false, "cannot find instance field");
1635 return false;
1636 }
1637 }
1638 return true;
1639 }
1640
1641 static Method* jvm_get_method_common(jobject method) {
1642 // some of this code was adapted from from jni_FromReflectedMethod
1643
1644 oop reflected = JNIHandles::resolve_non_null(method);
1645 oop mirror = nullptr;
1646 int slot = 0;
1647
1648 if (reflected->klass() == vmClasses::reflect_Constructor_klass()) {
1649 mirror = java_lang_reflect_Constructor::clazz(reflected);
1650 slot = java_lang_reflect_Constructor::slot(reflected);
1651 } else {
1652 assert(reflected->klass() == vmClasses::reflect_Method_klass(),
1653 "wrong type");
1654 mirror = java_lang_reflect_Method::clazz(reflected);
1655 slot = java_lang_reflect_Method::slot(reflected);
1656 }
1657 Klass* k = java_lang_Class::as_Klass(mirror);
1658
1659 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1660 assert(m != nullptr, "cannot find method");
1661 return m; // caller has to deal with null in product mode
1662 }
1663
1664 /* Type use annotations support (JDK 1.8) */
1665
1666 JVM_ENTRY_PROF(jbyteArray, JVM_GetClassTypeAnnotations, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1667 assert (cls != nullptr, "illegal class");
1668 ResourceMark rm(THREAD);
1669 // Return null for arrays and primitives
1670 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1671 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1672 if (k->is_instance_klass()) {
1673 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1674 if (type_annotations != nullptr) {
1675 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1676 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1677 }
1678 }
1679 }
1680 return nullptr;
1681 JVM_END
1682
1683 JVM_ENTRY_PROF(jbyteArray, JVM_GetMethodTypeAnnotations, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1684 assert (method != nullptr, "illegal method");
1685 // method is a handle to a java.lang.reflect.Method object
1686 Method* m = jvm_get_method_common(method);
1687 if (m == nullptr) {
1688 return nullptr;
1689 }
1690
1691 AnnotationArray* type_annotations = m->type_annotations();
1692 if (type_annotations != nullptr) {
1693 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1694 return (jbyteArray) JNIHandles::make_local(THREAD, a);
1695 }
1696
1697 return nullptr;
1698 JVM_END
1699
1700 JVM_ENTRY_PROF(jbyteArray, JVM_GetFieldTypeAnnotations, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1701 assert (field != nullptr, "illegal field");
1702 fieldDescriptor fd;
1703 bool gotFd = jvm_get_field_common(field, fd);
1704 if (!gotFd) {
1705 return nullptr;
1706 }
1707
1708 return (jbyteArray) JNIHandles::make_local(THREAD, Annotations::make_java_array(fd.type_annotations(), THREAD));
1709 JVM_END
1710
1711 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1712 if (!cp->is_within_bounds(index)) {
1713 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1714 }
1715 }
1716
1717 JVM_ENTRY_PROF(jobjectArray, JVM_GetMethodParameters, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1718 {
1719 // method is a handle to a java.lang.reflect.Method object
1720 Method* method_ptr = jvm_get_method_common(method);
1721 methodHandle mh (THREAD, method_ptr);
1722 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1723 const int num_params = mh->method_parameters_length();
1724
1725 if (num_params < 0) {
1726 // A -1 return value from method_parameters_length means there is no
1727 // parameter data. Return null to indicate this to the reflection
1728 // API.
1729 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1730 return (jobjectArray)nullptr;
1731 } else {
1732 // Otherwise, we return something up to reflection, even if it is
1733 // a zero-length array. Why? Because in some cases this can
1734 // trigger a MalformedParametersException.
1735
1736 // make sure all the symbols are properly formatted
1737 for (int i = 0; i < num_params; i++) {
1738 MethodParametersElement* params = mh->method_parameters_start();
1739 int index = params[i].name_cp_index;
1740 constantPoolHandle cp(THREAD, mh->constants());
1741 bounds_check(cp, index, CHECK_NULL);
1742
1743 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1744 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1745 "Wrong type at constant pool index");
1746 }
1747
1748 }
1749
1750 objArrayOop result_oop = oopFactory::new_objArray(vmClasses::reflect_Parameter_klass(), num_params, CHECK_NULL);
1751 objArrayHandle result (THREAD, result_oop);
1752
1753 for (int i = 0; i < num_params; i++) {
1754 MethodParametersElement* params = mh->method_parameters_start();
1755 // For a 0 index, give a null symbol
1756 Symbol* sym = 0 != params[i].name_cp_index ?
1757 mh->constants()->symbol_at(params[i].name_cp_index) : nullptr;
1758 int flags = params[i].flags;
1759 oop param = Reflection::new_parameter(reflected_method, i, sym,
1760 flags, CHECK_NULL);
1761 result->obj_at_put(i, param);
1762 }
1763 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1764 }
1765 }
1766 JVM_END
1767
1768 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1769
1770 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredFields, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1771 {
1772 JvmtiVMObjectAllocEventCollector oam;
1773
1774 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1775 // Exclude primitive types and array types
1776 if (java_lang_Class::is_primitive(ofMirror) ||
1777 java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1778 // Return empty array
1779 oop res = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), 0, CHECK_NULL);
1780 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1781 }
1782
1783 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1784 constantPoolHandle cp(THREAD, k->constants());
1785
1786 // Ensure class is linked
1787 k->link_class(CHECK_NULL);
1788
1789 // Allocate result
1790 int num_fields;
1791
1792 if (publicOnly) {
1793 num_fields = 0;
1794 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1795 if (fs.access_flags().is_public()) ++num_fields;
1796 }
1797 } else {
1798 num_fields = k->java_fields_count();
1799 }
1800
1801 objArrayOop r = oopFactory::new_objArray(vmClasses::reflect_Field_klass(), num_fields, CHECK_NULL);
1802 objArrayHandle result (THREAD, r);
1803
1804 int out_idx = 0;
1805 fieldDescriptor fd;
1806 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1807 if (!publicOnly || fs.access_flags().is_public()) {
1808 fd.reinitialize(k, fs.index());
1809 oop field = Reflection::new_field(&fd, CHECK_NULL);
1810 result->obj_at_put(out_idx, field);
1811 ++out_idx;
1812 }
1813 }
1814 assert(out_idx == num_fields, "just checking");
1815 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1816 }
1817 JVM_END
1818
1819 // A class is a record if and only if it is final and a direct subclass of
1820 // java.lang.Record and has a Record attribute; otherwise, it is not a record.
1821 JVM_ENTRY_PROF(jboolean, JVM_IsRecord, JVM_IsRecord(JNIEnv *env, jclass cls))
1822 {
1823 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1824 if (k != nullptr && k->is_instance_klass()) {
1825 InstanceKlass* ik = InstanceKlass::cast(k);
1826 return ik->is_record();
1827 } else {
1828 return false;
1829 }
1830 }
1831 JVM_END
1832
1833 // Returns an array containing the components of the Record attribute,
1834 // or null if the attribute is not present.
1835 //
1836 // Note that this function returns the components of the Record attribute
1837 // even if the class is not a record.
1838 JVM_ENTRY_PROF(jobjectArray, JVM_GetRecordComponents, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1839 {
1840 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1841 assert(c->is_instance_klass(), "must be");
1842 InstanceKlass* ik = InstanceKlass::cast(c);
1843
1844 Array<RecordComponent*>* components = ik->record_components();
1845 if (components != nullptr) {
1846 JvmtiVMObjectAllocEventCollector oam;
1847 constantPoolHandle cp(THREAD, ik->constants());
1848 int length = components->length();
1849 assert(length >= 0, "unexpected record_components length");
1850 objArrayOop record_components =
1851 oopFactory::new_objArray(vmClasses::RecordComponent_klass(), length, CHECK_NULL);
1852 objArrayHandle components_h (THREAD, record_components);
1853
1854 for (int x = 0; x < length; x++) {
1855 RecordComponent* component = components->at(x);
1856 assert(component != nullptr, "unexpected null record component");
1857 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1858 components_h->obj_at_put(x, component_oop);
1859 }
1860 return (jobjectArray)JNIHandles::make_local(THREAD, components_h());
1861 }
1862
1863 return nullptr;
1864 }
1865 JVM_END
1866
1867 static bool select_method(const methodHandle& method, bool want_constructor) {
1868 if (want_constructor) {
1869 return (method->is_initializer() && !method->is_static());
1870 } else {
1871 return (!method->is_initializer() && !method->is_overpass());
1872 }
1873 }
1874
1875 static jobjectArray get_class_declared_methods_helper(
1876 JNIEnv *env,
1877 jclass ofClass, jboolean publicOnly,
1878 bool want_constructor,
1879 Klass* klass, TRAPS) {
1880
1881 JvmtiVMObjectAllocEventCollector oam;
1882
1883 oop ofMirror = JNIHandles::resolve_non_null(ofClass);
1884 // Exclude primitive types and array types
1885 if (java_lang_Class::is_primitive(ofMirror)
1886 || java_lang_Class::as_Klass(ofMirror)->is_array_klass()) {
1887 // Return empty array
1888 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1889 return (jobjectArray) JNIHandles::make_local(THREAD, res);
1890 }
1891
1892 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(ofMirror));
1893
1894 // Ensure class is linked
1895 k->link_class(CHECK_NULL);
1896
1897 Array<Method*>* methods = k->methods();
1898 int methods_length = methods->length();
1899
1900 // Save original method_idnum in case of redefinition, which can change
1901 // the idnum of obsolete methods. The new method will have the same idnum
1902 // but if we refresh the methods array, the counts will be wrong.
1903 ResourceMark rm(THREAD);
1904 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1905 int num_methods = 0;
1906
1907 for (int i = 0; i < methods_length; i++) {
1908 methodHandle method(THREAD, methods->at(i));
1909 if (select_method(method, want_constructor)) {
1910 if (!publicOnly || method->is_public()) {
1911 idnums->push(method->method_idnum());
1912 ++num_methods;
1913 }
1914 }
1915 }
1916
1917 // Allocate result
1918 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1919 objArrayHandle result (THREAD, r);
1920
1921 // Now just put the methods that we selected above, but go by their idnum
1922 // in case of redefinition. The methods can be redefined at any safepoint,
1923 // so above when allocating the oop array and below when creating reflect
1924 // objects.
1925 for (int i = 0; i < num_methods; i++) {
1926 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1927 if (method.is_null()) {
1928 // Method may have been deleted and seems this API can handle null
1929 // Otherwise should probably put a method that throws NSME
1930 result->obj_at_put(i, nullptr);
1931 } else {
1932 oop m;
1933 if (want_constructor) {
1934 m = Reflection::new_constructor(method, CHECK_NULL);
1935 } else {
1936 m = Reflection::new_method(method, false, CHECK_NULL);
1937 }
1938 result->obj_at_put(i, m);
1939 }
1940 }
1941
1942 return (jobjectArray) JNIHandles::make_local(THREAD, result());
1943 }
1944
1945 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredMethods, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1946 {
1947 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1948 /*want_constructor*/ false,
1949 vmClasses::reflect_Method_klass(), THREAD);
1950 }
1951 JVM_END
1952
1953 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassDeclaredConstructors, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1954 {
1955 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1956 /*want_constructor*/ true,
1957 vmClasses::reflect_Constructor_klass(), THREAD);
1958 }
1959 JVM_END
1960
1961 JVM_ENTRY_PROF(jint, JVM_GetClassAccessFlags, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1962 {
1963 oop mirror = JNIHandles::resolve_non_null(cls);
1964 if (java_lang_Class::is_primitive(mirror)) {
1965 // Primitive type
1966 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1967 }
1968
1969 Klass* k = java_lang_Class::as_Klass(mirror);
1970 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1971 }
1972 JVM_END
1973
1974 JVM_ENTRY_PROF(jboolean, JVM_AreNestMates, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1975 {
1976 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1977 assert(c->is_instance_klass(), "must be");
1978 InstanceKlass* ck = InstanceKlass::cast(c);
1979 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1980 assert(m->is_instance_klass(), "must be");
1981 InstanceKlass* mk = InstanceKlass::cast(m);
1982 return ck->has_nestmate_access_to(mk, THREAD);
1983 }
1984 JVM_END
1985
1986 JVM_ENTRY_PROF(jclass, JVM_GetNestHost, JVM_GetNestHost(JNIEnv* env, jclass current))
1987 {
1988 // current is not a primitive or array class
1989 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1990 assert(c->is_instance_klass(), "must be");
1991 InstanceKlass* ck = InstanceKlass::cast(c);
1992 InstanceKlass* host = ck->nest_host(THREAD);
1993 return (jclass) (host == nullptr ? nullptr :
1994 JNIHandles::make_local(THREAD, host->java_mirror()));
1995 }
1996 JVM_END
1997
1998 JVM_ENTRY_PROF(jobjectArray, JVM_GetNestMembers, JVM_GetNestMembers(JNIEnv* env, jclass current))
1999 {
2000 // current is not a primitive or array class
2001 ResourceMark rm(THREAD);
2002 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
2003 assert(c->is_instance_klass(), "must be");
2004 InstanceKlass* ck = InstanceKlass::cast(c);
2005 InstanceKlass* host = ck->nest_host(THREAD);
2006
2007 log_trace(class, nestmates)("Calling GetNestMembers for type %s with nest-host %s",
2008 ck->external_name(), host->external_name());
2009 {
2010 JvmtiVMObjectAllocEventCollector oam;
2011 Array<u2>* members = host->nest_members();
2012 int length = members == nullptr ? 0 : members->length();
2013
2014 log_trace(class, nestmates)(" - host has %d listed nest members", length);
2015
2016 // nest host is first in the array so make it one bigger
2017 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2018 length + 1, CHECK_NULL);
2019 objArrayHandle result(THREAD, r);
2020 result->obj_at_put(0, host->java_mirror());
2021 if (length != 0) {
2022 int count = 0;
2023 for (int i = 0; i < length; i++) {
2024 int cp_index = members->at(i);
2025 Klass* k = host->constants()->klass_at(cp_index, THREAD);
2026 if (HAS_PENDING_EXCEPTION) {
2027 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
2028 return nullptr; // propagate VMEs
2029 }
2030 if (log_is_enabled(Trace, class, nestmates)) {
2031 stringStream ss;
2032 char* target_member_class = host->constants()->klass_name_at(cp_index)->as_C_string();
2033 ss.print(" - resolution of nest member %s failed: ", target_member_class);
2034 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
2035 log_trace(class, nestmates)("%s", ss.as_string());
2036 }
2037 CLEAR_PENDING_EXCEPTION;
2038 continue;
2039 }
2040 if (k->is_instance_klass()) {
2041 InstanceKlass* ik = InstanceKlass::cast(k);
2042 InstanceKlass* nest_host_k = ik->nest_host(CHECK_NULL);
2043 if (nest_host_k == host) {
2044 result->obj_at_put(count+1, k->java_mirror());
2045 count++;
2046 log_trace(class, nestmates)(" - [%d] = %s", count, ik->external_name());
2047 } else {
2048 log_trace(class, nestmates)(" - skipping member %s with different host %s",
2049 ik->external_name(), nest_host_k->external_name());
2050 }
2051 } else {
2052 log_trace(class, nestmates)(" - skipping member %s that is not an instance class",
2053 k->external_name());
2054 }
2055 }
2056 if (count < length) {
2057 // we had invalid entries so we need to compact the array
2058 log_trace(class, nestmates)(" - compacting array from length %d to %d",
2059 length + 1, count + 1);
2060
2061 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2062 count + 1, CHECK_NULL);
2063 objArrayHandle result2(THREAD, r2);
2064 for (int i = 0; i < count + 1; i++) {
2065 result2->obj_at_put(i, result->obj_at(i));
2066 }
2067 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2068 }
2069 }
2070 else {
2071 assert(host == ck || ck->is_hidden(), "must be singleton nest or dynamic nestmate");
2072 }
2073 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2074 }
2075 }
2076 JVM_END
2077
2078 JVM_ENTRY_PROF(jobjectArray, JVM_GetPermittedSubclasses, JVM_GetPermittedSubclasses(JNIEnv* env, jclass current))
2079 {
2080 oop mirror = JNIHandles::resolve_non_null(current);
2081 assert(!java_lang_Class::is_primitive(mirror), "should not be");
2082 Klass* c = java_lang_Class::as_Klass(mirror);
2083 assert(c->is_instance_klass(), "must be");
2084 InstanceKlass* ik = InstanceKlass::cast(c);
2085 ResourceMark rm(THREAD);
2086 log_trace(class, sealed)("Calling GetPermittedSubclasses for %s type %s",
2087 ik->is_sealed() ? "sealed" : "non-sealed", ik->external_name());
2088 if (ik->is_sealed()) {
2089 JvmtiVMObjectAllocEventCollector oam;
2090 Array<u2>* subclasses = ik->permitted_subclasses();
2091 int length = subclasses->length();
2092
2093 log_trace(class, sealed)(" - sealed class has %d permitted subclasses", length);
2094
2095 objArrayOop r = oopFactory::new_objArray(vmClasses::Class_klass(),
2096 length, CHECK_NULL);
2097 objArrayHandle result(THREAD, r);
2098 int count = 0;
2099 for (int i = 0; i < length; i++) {
2100 int cp_index = subclasses->at(i);
2101 Klass* k = ik->constants()->klass_at(cp_index, THREAD);
2102 if (HAS_PENDING_EXCEPTION) {
2103 if (PENDING_EXCEPTION->is_a(vmClasses::VirtualMachineError_klass())) {
2104 return nullptr; // propagate VMEs
2105 }
2106 if (log_is_enabled(Trace, class, sealed)) {
2107 stringStream ss;
2108 char* permitted_subclass = ik->constants()->klass_name_at(cp_index)->as_C_string();
2109 ss.print(" - resolution of permitted subclass %s failed: ", permitted_subclass);
2110 java_lang_Throwable::print(PENDING_EXCEPTION, &ss);
2111 log_trace(class, sealed)("%s", ss.as_string());
2112 }
2113
2114 CLEAR_PENDING_EXCEPTION;
2115 continue;
2116 }
2117 if (k->is_instance_klass()) {
2118 result->obj_at_put(count++, k->java_mirror());
2119 log_trace(class, sealed)(" - [%d] = %s", count, k->external_name());
2120 }
2121 }
2122 if (count < length) {
2123 // we had invalid entries so we need to compact the array
2124 objArrayOop r2 = oopFactory::new_objArray(vmClasses::Class_klass(),
2125 count, CHECK_NULL);
2126 objArrayHandle result2(THREAD, r2);
2127 for (int i = 0; i < count; i++) {
2128 result2->obj_at_put(i, result->obj_at(i));
2129 }
2130 return (jobjectArray)JNIHandles::make_local(THREAD, result2());
2131 }
2132 return (jobjectArray)JNIHandles::make_local(THREAD, result());
2133 } else {
2134 return nullptr;
2135 }
2136 }
2137 JVM_END
2138
2139 // Constant pool access //////////////////////////////////////////////////////////
2140
2141 JVM_ENTRY_PROF(jobject, JVM_GetClassConstantPool, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2142 {
2143 JvmtiVMObjectAllocEventCollector oam;
2144 oop mirror = JNIHandles::resolve_non_null(cls);
2145 // Return null for primitives and arrays
2146 if (!java_lang_Class::is_primitive(mirror)) {
2147 Klass* k = java_lang_Class::as_Klass(mirror);
2148 if (k->is_instance_klass()) {
2149 InstanceKlass* k_h = InstanceKlass::cast(k);
2150 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
2151 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2152 return JNIHandles::make_local(THREAD, jcp());
2153 }
2154 }
2155 return nullptr;
2156 }
2157 JVM_END
2158
2159
2160 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetSize, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2161 {
2162 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 return cp->length();
2164 }
2165 JVM_END
2166
2167
2168 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAt, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2169 {
2170 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_NULL);
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 Klass* k = cp->klass_at(index, CHECK_NULL);
2177 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2178 }
2179 JVM_END
2180
2181 JVM_ENTRY_PROF(jclass, JVM_ConstantPoolGetClassAtIfLoaded, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2182 {
2183 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2184 bounds_check(cp, index, CHECK_NULL);
2185 constantTag tag = cp->tag_at(index);
2186 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2187 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2188 }
2189 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2190 if (k == nullptr) return nullptr;
2191 return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
2192 }
2193 JVM_END
2194
2195 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2196 constantTag tag = cp->tag_at(index);
2197 if (!tag.is_method() && !tag.is_interface_method()) {
2198 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2199 }
2200 int klass_ref = cp->uncached_klass_ref_index_at(index);
2201 Klass* k_o;
2202 if (force_resolution) {
2203 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2204 } else {
2205 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2206 if (k_o == nullptr) return nullptr;
2207 }
2208 InstanceKlass* k = InstanceKlass::cast(k_o);
2209 Symbol* name = cp->uncached_name_ref_at(index);
2210 Symbol* sig = cp->uncached_signature_ref_at(index);
2211 methodHandle m (THREAD, k->find_method(name, sig));
2212 if (m.is_null()) {
2213 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2214 }
2215 oop method;
2216 if (!m->is_initializer() || m->is_static()) {
2217 method = Reflection::new_method(m, true, CHECK_NULL);
2218 } else {
2219 method = Reflection::new_constructor(m, CHECK_NULL);
2220 }
2221 return JNIHandles::make_local(THREAD, method);
2222 }
2223
2224 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAt, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2225 {
2226 JvmtiVMObjectAllocEventCollector oam;
2227 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2228 bounds_check(cp, index, CHECK_NULL);
2229 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2230 return res;
2231 }
2232 JVM_END
2233
2234 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetMethodAtIfLoaded, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2235 {
2236 JvmtiVMObjectAllocEventCollector oam;
2237 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2238 bounds_check(cp, index, CHECK_NULL);
2239 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2240 return res;
2241 }
2242 JVM_END
2243
2244 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2245 constantTag tag = cp->tag_at(index);
2246 if (!tag.is_field()) {
2247 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2248 }
2249 int klass_ref = cp->uncached_klass_ref_index_at(index);
2250 Klass* k_o;
2251 if (force_resolution) {
2252 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2253 } else {
2254 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2255 if (k_o == nullptr) return nullptr;
2256 }
2257 InstanceKlass* k = InstanceKlass::cast(k_o);
2258 Symbol* name = cp->uncached_name_ref_at(index);
2259 Symbol* sig = cp->uncached_signature_ref_at(index);
2260 fieldDescriptor fd;
2261 Klass* target_klass = k->find_field(name, sig, &fd);
2262 if (target_klass == nullptr) {
2263 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2264 }
2265 oop field = Reflection::new_field(&fd, CHECK_NULL);
2266 return JNIHandles::make_local(THREAD, field);
2267 }
2268
2269 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAt, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2270 {
2271 JvmtiVMObjectAllocEventCollector oam;
2272 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2273 bounds_check(cp, index, CHECK_NULL);
2274 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2275 return res;
2276 }
2277 JVM_END
2278
2279 JVM_ENTRY_PROF(jobject, JVM_ConstantPoolGetFieldAtIfLoaded, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2280 {
2281 JvmtiVMObjectAllocEventCollector oam;
2282 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2283 bounds_check(cp, index, CHECK_NULL);
2284 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2285 return res;
2286 }
2287 JVM_END
2288
2289 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2290 {
2291 JvmtiVMObjectAllocEventCollector oam;
2292 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2293 bounds_check(cp, index, CHECK_NULL);
2294 constantTag tag = cp->tag_at(index);
2295 if (!tag.is_field_or_method()) {
2296 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2297 }
2298 int klass_ref = cp->uncached_klass_ref_index_at(index);
2299 Symbol* klass_name = cp->klass_name_at(klass_ref);
2300 Symbol* member_name = cp->uncached_name_ref_at(index);
2301 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2302 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 3, CHECK_NULL);
2303 objArrayHandle dest(THREAD, dest_o);
2304 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2305 dest->obj_at_put(0, str());
2306 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2307 dest->obj_at_put(1, str());
2308 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2309 dest->obj_at_put(2, str());
2310 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2311 }
2312 JVM_END
2313
2314 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetClassRefIndexAt, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2315 {
2316 JvmtiVMObjectAllocEventCollector oam;
2317 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2318 bounds_check(cp, index, CHECK_0);
2319 constantTag tag = cp->tag_at(index);
2320 if (!tag.is_field_or_method()) {
2321 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2322 }
2323 return (jint) cp->uncached_klass_ref_index_at(index);
2324 }
2325 JVM_END
2326
2327 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2328 {
2329 JvmtiVMObjectAllocEventCollector oam;
2330 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2331 bounds_check(cp, index, CHECK_0);
2332 constantTag tag = cp->tag_at(index);
2333 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2334 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2335 }
2336 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2337 }
2338 JVM_END
2339
2340 JVM_ENTRY_PROF(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2341 {
2342 JvmtiVMObjectAllocEventCollector oam;
2343 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2344 bounds_check(cp, index, CHECK_NULL);
2345 constantTag tag = cp->tag_at(index);
2346 if (!tag.is_name_and_type()) {
2347 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2348 }
2349 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2350 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2351 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::String_klass(), 2, CHECK_NULL);
2352 objArrayHandle dest(THREAD, dest_o);
2353 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2354 dest->obj_at_put(0, str());
2355 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2356 dest->obj_at_put(1, str());
2357 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
2358 }
2359 JVM_END
2360
2361 JVM_ENTRY_PROF(jint, JVM_ConstantPoolGetIntAt, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2362 {
2363 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2364 bounds_check(cp, index, CHECK_0);
2365 constantTag tag = cp->tag_at(index);
2366 if (!tag.is_int()) {
2367 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2368 }
2369 return cp->int_at(index);
2370 }
2371 JVM_END
2372
2373 JVM_ENTRY_PROF(jlong, JVM_ConstantPoolGetLongAt, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2374 {
2375 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2376 bounds_check(cp, index, CHECK_(0L));
2377 constantTag tag = cp->tag_at(index);
2378 if (!tag.is_long()) {
2379 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2380 }
2381 return cp->long_at(index);
2382 }
2383 JVM_END
2384
2385 JVM_ENTRY_PROF(jfloat, JVM_ConstantPoolGetFloatAt, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2386 {
2387 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2388 bounds_check(cp, index, CHECK_(0.0f));
2389 constantTag tag = cp->tag_at(index);
2390 if (!tag.is_float()) {
2391 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2392 }
2393 return cp->float_at(index);
2394 }
2395 JVM_END
2396
2397 JVM_ENTRY_PROF(jdouble, JVM_ConstantPoolGetDoubleAt, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2398 {
2399 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2400 bounds_check(cp, index, CHECK_(0.0));
2401 constantTag tag = cp->tag_at(index);
2402 if (!tag.is_double()) {
2403 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2404 }
2405 return cp->double_at(index);
2406 }
2407 JVM_END
2408
2409 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetStringAt, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2410 {
2411 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2412 bounds_check(cp, index, CHECK_NULL);
2413 constantTag tag = cp->tag_at(index);
2414 if (!tag.is_string()) {
2415 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2416 }
2417 oop str = cp->string_at(index, CHECK_NULL);
2418 return (jstring) JNIHandles::make_local(THREAD, str);
2419 }
2420 JVM_END
2421
2422 JVM_ENTRY_PROF(jstring, JVM_ConstantPoolGetUTF8At, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2423 {
2424 JvmtiVMObjectAllocEventCollector oam;
2425 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2426 bounds_check(cp, index, CHECK_NULL);
2427 constantTag tag = cp->tag_at(index);
2428 if (!tag.is_symbol()) {
2429 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2430 }
2431 Symbol* sym = cp->symbol_at(index);
2432 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2433 return (jstring) JNIHandles::make_local(THREAD, str());
2434 }
2435 JVM_END
2436
2437 JVM_ENTRY_PROF(jbyte, JVM_ConstantPoolGetTagAt, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2438 {
2439 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2440 bounds_check(cp, index, CHECK_0);
2441 constantTag tag = cp->tag_at(index);
2442 jbyte result = tag.value();
2443 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2444 // they are changed to the corresponding tags from the JVM spec, so that java code in
2445 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2446 if (tag.is_klass_or_reference()) {
2447 result = JVM_CONSTANT_Class;
2448 } else if (tag.is_string_index()) {
2449 result = JVM_CONSTANT_String;
2450 } else if (tag.is_method_type_in_error()) {
2451 result = JVM_CONSTANT_MethodType;
2452 } else if (tag.is_method_handle_in_error()) {
2453 result = JVM_CONSTANT_MethodHandle;
2454 } else if (tag.is_dynamic_constant_in_error()) {
2455 result = JVM_CONSTANT_Dynamic;
2456 }
2457 return result;
2458 }
2459 JVM_END
2460
2461 // Assertion support. //////////////////////////////////////////////////////////
2462
2463 JVM_ENTRY_PROF(jboolean, JVM_DesiredAssertionStatus, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2464 assert(cls != nullptr, "bad class");
2465
2466 oop r = JNIHandles::resolve(cls);
2467 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2468 if (java_lang_Class::is_primitive(r)) return false;
2469
2470 Klass* k = java_lang_Class::as_Klass(r);
2471 assert(k->is_instance_klass(), "must be an instance klass");
2472 if (!k->is_instance_klass()) return false;
2473
2474 ResourceMark rm(THREAD);
2475 const char* name = k->name()->as_C_string();
2476 bool system_class = k->class_loader() == nullptr;
2477 return JavaAssertions::enabled(name, system_class);
2478
2479 JVM_END
2480
2481
2482 // Return a new AssertionStatusDirectives object with the fields filled in with
2483 // command-line assertion arguments (i.e., -ea, -da).
2484 JVM_ENTRY_PROF(jobject, JVM_AssertionStatusDirectives, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2485 JvmtiVMObjectAllocEventCollector oam;
2486 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2487 return JNIHandles::make_local(THREAD, asd);
2488 JVM_END
2489
2490 // Verification ////////////////////////////////////////////////////////////////////////////////
2491
2492 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2493
2494 // RedefineClasses support: bug 6214132 caused verification to fail.
2495 // All functions from this section should call the jvmtiThreadSate function:
2496 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2497 // The function returns a Klass* of the _scratch_class if the verifier
2498 // was invoked in the middle of the class redefinition.
2499 // Otherwise it returns its argument value which is the _the_class Klass*.
2500 // Please, refer to the description in the jvmtiThreadSate.hpp.
2501
2502 JVM_ENTRY_PROF(const char*, JVM_GetClassNameUTF, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 return k->name()->as_utf8();
2506 JVM_END
2507
2508
2509 JVM_ENTRY_PROF(void, JVM_GetClassCPTypes, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2510 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2511 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2512 // types will have length zero if this is not an InstanceKlass
2513 // (length is determined by call to JVM_GetClassCPEntriesCount)
2514 if (k->is_instance_klass()) {
2515 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2516 for (int index = cp->length() - 1; index >= 0; index--) {
2517 constantTag tag = cp->tag_at(index);
2518 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2519 }
2520 }
2521 JVM_END
2522
2523
2524 JVM_ENTRY_PROF(jint, JVM_GetClassCPEntriesCount, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2527 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2528 JVM_END
2529
2530
2531 JVM_ENTRY_PROF(jint, JVM_GetClassFieldsCount, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2535 JVM_END
2536
2537
2538 JVM_ENTRY_PROF(jint, JVM_GetClassMethodsCount, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2539 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2540 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2541 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2542 JVM_END
2543
2544
2545 // The following methods, used for the verifier, are never called with
2546 // array klasses, so a direct cast to InstanceKlass is safe.
2547 // Typically, these methods are called in a loop with bounds determined
2548 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2549 // zero for arrays.
2550 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionIndexes, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2551 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2553 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2554 int length = method->checked_exceptions_length();
2555 if (length > 0) {
2556 CheckedExceptionElement* table= method->checked_exceptions_start();
2557 for (int i = 0; i < length; i++) {
2558 exceptions[i] = table[i].class_cp_index;
2559 }
2560 }
2561 JVM_END
2562
2563
2564 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionsCount, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2565 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2566 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2567 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2568 return method->checked_exceptions_length();
2569 JVM_END
2570
2571
2572 JVM_ENTRY_PROF(void, JVM_GetMethodIxByteCode, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2575 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2576 memcpy(code, method->code_base(), method->code_size());
2577 JVM_END
2578
2579
2580 JVM_ENTRY_PROF(jint, JVM_GetMethodIxByteCodeLength, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2581 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2582 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2583 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2584 return method->code_size();
2585 JVM_END
2586
2587
2588 JVM_ENTRY_PROF(void, JVM_GetMethodIxExceptionTableEntry, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2589 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2590 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2591 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2592 ExceptionTable extable(method);
2593 entry->start_pc = extable.start_pc(entry_index);
2594 entry->end_pc = extable.end_pc(entry_index);
2595 entry->handler_pc = extable.handler_pc(entry_index);
2596 entry->catchType = extable.catch_type_index(entry_index);
2597 JVM_END
2598
2599
2600 JVM_ENTRY_PROF(jint, JVM_GetMethodIxExceptionTableLength, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2602 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2603 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2604 return method->exception_table_length();
2605 JVM_END
2606
2607
2608 JVM_ENTRY_PROF(jint, JVM_GetMethodIxModifiers, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2609 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2610 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2611 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2612 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2613 JVM_END
2614
2615
2616 JVM_ENTRY_PROF(jint, JVM_GetFieldIxModifiers, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2619 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2620 JVM_END
2621
2622
2623 JVM_ENTRY_PROF(jint, JVM_GetMethodIxLocalsCount, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2624 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2627 return method->max_locals();
2628 JVM_END
2629
2630
2631 JVM_ENTRY_PROF(jint, JVM_GetMethodIxArgsSize, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2632 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2633 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2634 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2635 return method->size_of_parameters();
2636 JVM_END
2637
2638
2639 JVM_ENTRY_PROF(jint, JVM_GetMethodIxMaxStack, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2640 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2641 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2642 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2643 return method->verifier_max_stack();
2644 JVM_END
2645
2646
2647 JVM_ENTRY_PROF(jboolean, JVM_IsConstructorIx, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2648 ResourceMark rm(THREAD);
2649 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2650 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2651 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2652 return method->name() == vmSymbols::object_initializer_name();
2653 JVM_END
2654
2655
2656 JVM_ENTRY_PROF(jboolean, JVM_IsVMGeneratedMethodIx, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2657 ResourceMark rm(THREAD);
2658 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2659 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2660 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2661 return method->is_overpass();
2662 JVM_END
2663
2664 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxNameUTF, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2665 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2666 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2667 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2668 return method->name()->as_utf8();
2669 JVM_END
2670
2671
2672 JVM_ENTRY_PROF(const char*, JVM_GetMethodIxSignatureUTF, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2673 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2674 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2675 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2676 return method->signature()->as_utf8();
2677 JVM_END
2678
2679 /**
2680 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2681 * read entries in the constant pool. Since the old verifier always
2682 * works on a copy of the code, it will not see any rewriting that
2683 * may possibly occur in the middle of verification. So it is important
2684 * that nothing it calls tries to use the cpCache instead of the raw
2685 * constant pool, so we must use cp->uncached_x methods when appropriate.
2686 */
2687 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldNameUTF, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2688 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2689 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2690 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2691 switch (cp->tag_at(cp_index).value()) {
2692 case JVM_CONSTANT_Fieldref:
2693 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2694 default:
2695 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2696 }
2697 ShouldNotReachHere();
2698 return nullptr;
2699 JVM_END
2700
2701
2702 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodNameUTF, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2703 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2704 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2705 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2706 switch (cp->tag_at(cp_index).value()) {
2707 case JVM_CONSTANT_InterfaceMethodref:
2708 case JVM_CONSTANT_Methodref:
2709 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2710 default:
2711 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2712 }
2713 ShouldNotReachHere();
2714 return nullptr;
2715 JVM_END
2716
2717
2718 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodSignatureUTF, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2719 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2720 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2721 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2722 switch (cp->tag_at(cp_index).value()) {
2723 case JVM_CONSTANT_InterfaceMethodref:
2724 case JVM_CONSTANT_Methodref:
2725 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2726 default:
2727 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2728 }
2729 ShouldNotReachHere();
2730 return nullptr;
2731 JVM_END
2732
2733
2734 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldSignatureUTF, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2735 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2736 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2737 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2738 switch (cp->tag_at(cp_index).value()) {
2739 case JVM_CONSTANT_Fieldref:
2740 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2741 default:
2742 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2743 }
2744 ShouldNotReachHere();
2745 return nullptr;
2746 JVM_END
2747
2748
2749 JVM_ENTRY_PROF(const char*, JVM_GetCPClassNameUTF, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2750 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2751 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2752 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2753 Symbol* classname = cp->klass_name_at(cp_index);
2754 return classname->as_utf8();
2755 JVM_END
2756
2757
2758 JVM_ENTRY_PROF(const char*, JVM_GetCPFieldClassNameUTF, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2759 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2760 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2761 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2762 switch (cp->tag_at(cp_index).value()) {
2763 case JVM_CONSTANT_Fieldref: {
2764 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2765 Symbol* classname = cp->klass_name_at(class_index);
2766 return classname->as_utf8();
2767 }
2768 default:
2769 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2770 }
2771 ShouldNotReachHere();
2772 return nullptr;
2773 JVM_END
2774
2775
2776 JVM_ENTRY_PROF(const char*, JVM_GetCPMethodClassNameUTF, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2777 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2778 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2779 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2780 switch (cp->tag_at(cp_index).value()) {
2781 case JVM_CONSTANT_Methodref:
2782 case JVM_CONSTANT_InterfaceMethodref: {
2783 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2784 Symbol* classname = cp->klass_name_at(class_index);
2785 return classname->as_utf8();
2786 }
2787 default:
2788 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2789 }
2790 ShouldNotReachHere();
2791 return nullptr;
2792 JVM_END
2793
2794
2795 JVM_ENTRY_PROF(jint, JVM_GetCPFieldModifiers, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2796 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2797 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2798 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2799 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2800 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2801 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2802 switch (cp->tag_at(cp_index).value()) {
2803 case JVM_CONSTANT_Fieldref: {
2804 Symbol* name = cp->uncached_name_ref_at(cp_index);
2805 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2806 InstanceKlass* ik = InstanceKlass::cast(k_called);
2807 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2808 if (fs.name() == name && fs.signature() == signature) {
2809 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2810 }
2811 }
2812 return -1;
2813 }
2814 default:
2815 fatal("JVM_GetCPFieldModifiers: illegal constant");
2816 }
2817 ShouldNotReachHere();
2818 return 0;
2819 JVM_END
2820
2821
2822 JVM_ENTRY_PROF(jint, JVM_GetCPMethodModifiers, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2823 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2824 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2825 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2826 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2827 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2828 switch (cp->tag_at(cp_index).value()) {
2829 case JVM_CONSTANT_Methodref:
2830 case JVM_CONSTANT_InterfaceMethodref: {
2831 Symbol* name = cp->uncached_name_ref_at(cp_index);
2832 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2833 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2834 int methods_count = methods->length();
2835 for (int i = 0; i < methods_count; i++) {
2836 Method* method = methods->at(i);
2837 if (method->name() == name && method->signature() == signature) {
2838 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2839 }
2840 }
2841 return -1;
2842 }
2843 default:
2844 fatal("JVM_GetCPMethodModifiers: illegal constant");
2845 }
2846 ShouldNotReachHere();
2847 return 0;
2848 JVM_END
2849
2850
2851 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2852
2853 JVM_LEAF_PROF(void, JVM_ReleaseUTF, JVM_ReleaseUTF(const char *utf))
2854 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2855 JVM_END
2856
2857
2858 JVM_ENTRY_PROF(jboolean, JVM_IsSameClassPackage, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2859 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2860 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2861 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2862 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2863 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2864 JVM_END
2865
2866 // Printing support //////////////////////////////////////////////////
2867 extern "C" {
2868
2869 ATTRIBUTE_PRINTF(3, 0)
2870 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2871 // Reject count values that are negative signed values converted to
2872 // unsigned; see bug 4399518, 4417214
2873 if ((intptr_t)count <= 0) return -1;
2874
2875 int result = os::vsnprintf(str, count, fmt, args);
2876 if (result > 0 && (size_t)result >= count) {
2877 result = -1;
2878 }
2879
2880 return result;
2881 }
2882
2883 ATTRIBUTE_PRINTF(3, 4)
2884 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2885 va_list args;
2886 int len;
2887 va_start(args, fmt);
2888 len = jio_vsnprintf(str, count, fmt, args);
2889 va_end(args);
2890 return len;
2891 }
2892
2893 ATTRIBUTE_PRINTF(2, 3)
2894 int jio_fprintf(FILE* f, const char *fmt, ...) {
2895 int len;
2896 va_list args;
2897 va_start(args, fmt);
2898 len = jio_vfprintf(f, fmt, args);
2899 va_end(args);
2900 return len;
2901 }
2902
2903 ATTRIBUTE_PRINTF(2, 0)
2904 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2905 if (Arguments::vfprintf_hook() != nullptr) {
2906 return Arguments::vfprintf_hook()(f, fmt, args);
2907 } else {
2908 return vfprintf(f, fmt, args);
2909 }
2910 }
2911
2912 ATTRIBUTE_PRINTF(1, 2)
2913 JNIEXPORT int jio_printf(const char *fmt, ...) {
2914 int len;
2915 va_list args;
2916 va_start(args, fmt);
2917 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2918 va_end(args);
2919 return len;
2920 }
2921
2922 // HotSpot specific jio method
2923 void jio_print(const char* s, size_t len) {
2924 // Try to make this function as atomic as possible.
2925 if (Arguments::vfprintf_hook() != nullptr) {
2926 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2927 } else {
2928 // Make an unused local variable to avoid warning from gcc compiler.
2929 bool dummy = os::write(defaultStream::output_fd(), s, len);
2930 }
2931 }
2932
2933 } // Extern C
2934
2935 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2936
2937 // In most of the JVM thread support functions we need to access the
2938 // thread through a ThreadsListHandle to prevent it from exiting and
2939 // being reclaimed while we try to operate on it. The exceptions to this
2940 // rule are when operating on the current thread, or if the monitor of
2941 // the target java.lang.Thread is locked at the Java level - in both
2942 // cases the target cannot exit.
2943
2944 static void thread_entry(JavaThread* thread, TRAPS) {
2945 HandleMark hm(THREAD);
2946 Handle obj(THREAD, thread->threadObj());
2947 JavaValue result(T_VOID);
2948 JavaCalls::call_virtual(&result,
2949 obj,
2950 vmClasses::Thread_klass(),
2951 vmSymbols::run_method_name(),
2952 vmSymbols::void_method_signature(),
2953 THREAD);
2954 }
2955
2956
2957 JVM_ENTRY_PROF(void, JVM_StartThread, JVM_StartThread(JNIEnv* env, jobject jthread))
2958 #if INCLUDE_CDS
2959 if (CDSConfig::is_dumping_classic_static_archive()) {
2960 // During java -Xshare:dump, if we allow multiple Java threads to
2961 // execute in parallel, symbols and classes may be loaded in
2962 // random orders which will make the resulting CDS archive
2963 // non-deterministic.
2964 //
2965 // Lucikly, during java -Xshare:dump, it's important to run only
2966 // the code in the main Java thread (which is NOT started here) that
2967 // creates the module graph, etc. It's safe to not start the other
2968 // threads which are launched by class static initializers
2969 // (ReferenceHandler, FinalizerThread and CleanerImpl).
2970 if (log_is_enabled(Info, cds)) {
2971 ResourceMark rm;
2972 oop t = JNIHandles::resolve_non_null(jthread);
2973 log_info(cds)("JVM_StartThread() ignored: %s", t->klass()->external_name());
2974 }
2975 return;
2976 }
2977 #endif
2978 JavaThread *native_thread = nullptr;
2979
2980 // We cannot hold the Threads_lock when we throw an exception,
2981 // due to rank ordering issues. Example: we might need to grab the
2982 // Heap_lock while we construct the exception.
2983 bool throw_illegal_thread_state = false;
2984
2985 // We must release the Threads_lock before we can post a jvmti event
2986 // in Thread::start.
2987 {
2988 // Ensure that the C++ Thread and OSThread structures aren't freed before
2989 // we operate.
2990 MutexLocker mu(Threads_lock);
2991
2992 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2993 // re-starting an already started thread, so we should usually find
2994 // that the JavaThread is null. However for a JNI attached thread
2995 // there is a small window between the Thread object being created
2996 // (with its JavaThread set) and the update to its threadStatus, so we
2997 // have to check for this
2998 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != nullptr) {
2999 throw_illegal_thread_state = true;
3000 } else {
3001 jlong size =
3002 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
3003 // Allocate the C++ Thread structure and create the native thread. The
3004 // stack size retrieved from java is 64-bit signed, but the constructor takes
3005 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
3006 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
3007 // - Avoid passing negative values which would result in really large stacks.
3008 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
3009 size_t sz = size > 0 ? (size_t) size : 0;
3010 native_thread = new JavaThread(&thread_entry, sz);
3011
3012 // At this point it may be possible that no osthread was created for the
3013 // JavaThread due to lack of memory. Check for this situation and throw
3014 // an exception if necessary. Eventually we may want to change this so
3015 // that we only grab the lock if the thread was created successfully -
3016 // then we can also do this check and throw the exception in the
3017 // JavaThread constructor.
3018 if (native_thread->osthread() != nullptr) {
3019 // Note: the current thread is not being used within "prepare".
3020 native_thread->prepare(jthread);
3021 }
3022 }
3023 }
3024
3025 if (throw_illegal_thread_state) {
3026 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3027 }
3028
3029 assert(native_thread != nullptr, "Starting null thread?");
3030
3031 if (native_thread->osthread() == nullptr) {
3032 ResourceMark rm(thread);
3033 log_warning(os, thread)("Failed to start the native thread for java.lang.Thread \"%s\"",
3034 JavaThread::name_for(JNIHandles::resolve_non_null(jthread)));
3035 // No one should hold a reference to the 'native_thread'.
3036 native_thread->smr_delete();
3037 if (JvmtiExport::should_post_resource_exhausted()) {
3038 JvmtiExport::post_resource_exhausted(
3039 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3040 os::native_thread_creation_failed_msg());
3041 }
3042 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3043 os::native_thread_creation_failed_msg());
3044 }
3045
3046 JFR_ONLY(Jfr::on_java_thread_start(thread, native_thread);)
3047
3048 Thread::start(native_thread);
3049
3050 JVM_END
3051
3052
3053 JVM_ENTRY_PROF(void, JVM_SetThreadPriority, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3054 ThreadsListHandle tlh(thread);
3055 oop java_thread = nullptr;
3056 JavaThread* receiver = nullptr;
3057 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3058 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3059
3060 if (is_alive) {
3061 // jthread refers to a live JavaThread.
3062 Thread::set_priority(receiver, (ThreadPriority)prio);
3063 }
3064 // Implied else: If the JavaThread hasn't started yet, then the
3065 // priority set in the java.lang.Thread object above will be pushed
3066 // down when it does start.
3067 JVM_END
3068
3069
3070 JVM_LEAF_PROF(void, JVM_Yield, JVM_Yield(JNIEnv *env, jclass threadClass))
3071 if (os::dont_yield()) return;
3072 HOTSPOT_THREAD_YIELD();
3073 os::naked_yield();
3074 JVM_END
3075
3076 JVM_ENTRY_PROF(void, JVM_SleepNanos, JVM_SleepNanos(JNIEnv* env, jclass threadClass, jlong nanos))
3077 if (nanos < 0) {
3078 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "nanosecond timeout value out of range");
3079 }
3080
3081 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3082 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3083 }
3084
3085 // Save current thread state and restore it at the end of this block.
3086 // And set new thread state to SLEEPING.
3087 JavaThreadSleepState jtss(thread);
3088
3089 HOTSPOT_THREAD_SLEEP_BEGIN(nanos / NANOSECS_PER_MILLISEC);
3090
3091 if (nanos == 0) {
3092 os::naked_yield();
3093 } else {
3094 ThreadState old_state = thread->osthread()->get_state();
3095 thread->osthread()->set_state(SLEEPING);
3096 if (!thread->sleep_nanos(nanos)) { // interrupted
3097 // An asynchronous exception could have been thrown on
3098 // us while we were sleeping. We do not overwrite those.
3099 if (!HAS_PENDING_EXCEPTION) {
3100 HOTSPOT_THREAD_SLEEP_END(1);
3101
3102 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3103 // to properly restore the thread state. That's likely wrong.
3104 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3105 }
3106 }
3107 thread->osthread()->set_state(old_state);
3108 }
3109 HOTSPOT_THREAD_SLEEP_END(0);
3110 JVM_END
3111
3112 JVM_ENTRY_PROF(jobject, JVM_CurrentCarrierThread, JVM_CurrentCarrierThread(JNIEnv* env, jclass threadClass))
3113 oop jthread = thread->threadObj();
3114 assert(jthread != nullptr, "no current carrier thread!");
3115 return JNIHandles::make_local(THREAD, jthread);
3116 JVM_END
3117
3118 JVM_ENTRY_PROF(jobject, JVM_CurrentThread, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3119 oop theThread = thread->vthread();
3120 assert(theThread != (oop)nullptr, "no current thread!");
3121 return JNIHandles::make_local(THREAD, theThread);
3122 JVM_END
3123
3124 JVM_ENTRY_PROF(void, JVM_SetCurrentThread, JVM_SetCurrentThread(JNIEnv* env, jobject thisThread,
3125 jobject theThread))
3126 oop threadObj = JNIHandles::resolve(theThread);
3127 thread->set_vthread(threadObj);
3128 JFR_ONLY(Jfr::on_set_current_thread(thread, threadObj);)
3129 JVM_END
3130
3131 JVM_ENTRY_PROF(jlong, JVM_GetNextThreadIdOffset, JVM_GetNextThreadIdOffset(JNIEnv* env, jclass threadClass))
3132 return ThreadIdentifier::unsafe_offset();
3133 JVM_END
3134
3135 JVM_ENTRY_PROF(void, JVM_Interrupt, JVM_Interrupt(JNIEnv* env, jobject jthread))
3136 ThreadsListHandle tlh(thread);
3137 JavaThread* receiver = nullptr;
3138 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, nullptr);
3139 if (is_alive) {
3140 // jthread refers to a live JavaThread.
3141 receiver->interrupt();
3142 }
3143 JVM_END
3144
3145 // Return true iff the current thread has locked the object passed in
3146
3147 JVM_ENTRY_PROF(jboolean, JVM_HoldsLock, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3148 if (obj == nullptr) {
3149 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3150 }
3151 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3152 return ObjectSynchronizer::current_thread_holds_lock(thread, h_obj);
3153 JVM_END
3154
3155 JVM_ENTRY_PROF(jobject, JVM_GetStackTrace, JVM_GetStackTrace(JNIEnv *env, jobject jthread))
3156 oop trace = java_lang_Thread::async_get_stack_trace(JNIHandles::resolve(jthread), THREAD);
3157 return JNIHandles::make_local(THREAD, trace);
3158 JVM_END
3159
3160 JVM_ENTRY_PROF(void, JVM_DumpAllStacks, JVM_DumpAllStacks(JNIEnv* env, jclass))
3161 VM_PrintThreads op;
3162 VMThread::execute(&op);
3163 if (JvmtiExport::should_post_data_dump()) {
3164 JvmtiExport::post_data_dump();
3165 }
3166 JVM_END
3167
3168 JVM_ENTRY_PROF(void, JVM_SetNativeThreadName, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3169 // We don't use a ThreadsListHandle here because the current thread
3170 // must be alive.
3171 oop java_thread = JNIHandles::resolve_non_null(jthread);
3172 JavaThread* thr = java_lang_Thread::thread(java_thread);
3173 if (thread == thr && !thr->has_attached_via_jni()) {
3174 // Thread naming is only supported for the current thread and
3175 // we don't set the name of an attached thread to avoid stepping
3176 // on other programs.
3177 ResourceMark rm(thread);
3178 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3179 os::set_native_thread_name(thread_name);
3180 }
3181 JVM_END
3182
3183 JVM_ENTRY_PROF(jobject, JVM_ScopedValueCache, JVM_ScopedValueCache(JNIEnv* env, jclass threadClass))
3184 oop theCache = thread->scopedValueCache();
3185 return JNIHandles::make_local(THREAD, theCache);
3186 JVM_END
3187
3188 JVM_ENTRY_PROF(void, JVM_SetScopedValueCache, JVM_SetScopedValueCache(JNIEnv* env, jclass threadClass,
3189 jobject theCache))
3190 arrayOop objs = arrayOop(JNIHandles::resolve(theCache));
3191 thread->set_scopedValueCache(objs);
3192 JVM_END
3193
3194 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3195
3196 JVM_ENTRY_PROF(jobjectArray, JVM_GetClassContext, JVM_GetClassContext(JNIEnv *env))
3197 ResourceMark rm(THREAD);
3198 JvmtiVMObjectAllocEventCollector oam;
3199 vframeStream vfst(thread);
3200
3201 if (vmClasses::reflect_CallerSensitive_klass() != nullptr) {
3202 // This must only be called from SecurityManager.getClassContext
3203 Method* m = vfst.method();
3204 if (!(m->method_holder() == vmClasses::SecurityManager_klass() &&
3205 m->name() == vmSymbols::getClassContext_name() &&
3206 m->signature() == vmSymbols::void_class_array_signature())) {
3207 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3208 }
3209 }
3210
3211 // Collect method holders
3212 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3213 for (; !vfst.at_end(); vfst.security_next()) {
3214 Method* m = vfst.method();
3215 // Native frames are not returned
3216 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3217 Klass* holder = m->method_holder();
3218 assert(holder->is_klass(), "just checking");
3219 klass_array->append(holder);
3220 }
3221 }
3222
3223 // Create result array of type [Ljava/lang/Class;
3224 objArrayOop result = oopFactory::new_objArray(vmClasses::Class_klass(), klass_array->length(), CHECK_NULL);
3225 // Fill in mirrors corresponding to method holders
3226 for (int i = 0; i < klass_array->length(); i++) {
3227 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3228 }
3229
3230 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3231 JVM_END
3232
3233
3234 // java.lang.Package ////////////////////////////////////////////////////////////////
3235
3236
3237 JVM_ENTRY_PROF(jstring, JVM_GetSystemPackage, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3238 ResourceMark rm(THREAD);
3239 JvmtiVMObjectAllocEventCollector oam;
3240 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3241 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3242 return (jstring) JNIHandles::make_local(THREAD, result);
3243 JVM_END
3244
3245
3246 JVM_ENTRY_PROF(jobjectArray, JVM_GetSystemPackages, JVM_GetSystemPackages(JNIEnv *env))
3247 JvmtiVMObjectAllocEventCollector oam;
3248 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3249 return (jobjectArray) JNIHandles::make_local(THREAD, result);
3250 JVM_END
3251
3252
3253 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3254
3255
3256 JVM_ENTRY_PROF(jobject, JVM_GetAndClearReferencePendingList, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3257 MonitorLocker ml(Heap_lock);
3258 oop ref = Universe::reference_pending_list();
3259 if (ref != nullptr) {
3260 Universe::clear_reference_pending_list();
3261 }
3262 return JNIHandles::make_local(THREAD, ref);
3263 JVM_END
3264
3265 JVM_ENTRY_PROF(jboolean, JVM_HasReferencePendingList, JVM_HasReferencePendingList(JNIEnv* env))
3266 MonitorLocker ml(Heap_lock);
3267 return Universe::has_reference_pending_list();
3268 JVM_END
3269
3270 JVM_ENTRY_PROF(void, JVM_WaitForReferencePendingList, JVM_WaitForReferencePendingList(JNIEnv* env))
3271 MonitorLocker ml(Heap_lock);
3272 while (!Universe::has_reference_pending_list()) {
3273 ml.wait();
3274 }
3275 JVM_END
3276
3277 JVM_ENTRY_PROF(jboolean, JVM_ReferenceRefersTo, JVM_ReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3278 oop ref_oop = JNIHandles::resolve_non_null(ref);
3279 // PhantomReference has it's own implementation of refersTo().
3280 // See: JVM_PhantomReferenceRefersTo
3281 assert(!java_lang_ref_Reference::is_phantom(ref_oop), "precondition");
3282 oop referent = java_lang_ref_Reference::weak_referent_no_keepalive(ref_oop);
3283 return referent == JNIHandles::resolve(o);
3284 JVM_END
3285
3286 JVM_ENTRY_PROF(void, JVM_ReferenceClear, JVM_ReferenceClear(JNIEnv* env, jobject ref))
3287 oop ref_oop = JNIHandles::resolve_non_null(ref);
3288 // FinalReference has it's own implementation of clear().
3289 assert(!java_lang_ref_Reference::is_final(ref_oop), "precondition");
3290 if (java_lang_ref_Reference::unknown_referent_no_keepalive(ref_oop) == nullptr) {
3291 // If the referent has already been cleared then done.
3292 // However, if the referent is dead but has not yet been cleared by
3293 // concurrent reference processing, it should NOT be cleared here.
3294 // Instead, clearing should be left to the GC. Clearing it here could
3295 // detectably lose an expected notification, which is impossible with
3296 // STW reference processing. The clearing in enqueue() doesn't have
3297 // this problem, since the enqueue covers the notification, but it's not
3298 // worth the effort to handle that case specially.
3299 return;
3300 }
3301 java_lang_ref_Reference::clear_referent(ref_oop);
3302 JVM_END
3303
3304
3305 // java.lang.ref.PhantomReference //////////////////////////////////////////////////
3306
3307
3308 JVM_ENTRY_PROF(jboolean, JVM_PhantomReferenceRefersTo, JVM_PhantomReferenceRefersTo(JNIEnv* env, jobject ref, jobject o))
3309 oop ref_oop = JNIHandles::resolve_non_null(ref);
3310 oop referent = java_lang_ref_Reference::phantom_referent_no_keepalive(ref_oop);
3311 return referent == JNIHandles::resolve(o);
3312 JVM_END
3313
3314
3315 // ObjectInputStream ///////////////////////////////////////////////////////////////
3316
3317 // Return the first user-defined class loader up the execution stack, or null
3318 // if only code from the bootstrap or platform class loader is on the stack.
3319
3320 JVM_ENTRY_PROF(jobject, JVM_LatestUserDefinedLoader, JVM_LatestUserDefinedLoader(JNIEnv *env))
3321 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3322 InstanceKlass* ik = vfst.method()->method_holder();
3323 oop loader = ik->class_loader();
3324 if (loader != nullptr && !SystemDictionary::is_platform_class_loader(loader)) {
3325 // Skip reflection related frames
3326 if (!ik->is_subclass_of(vmClasses::reflect_SerializationConstructorAccessorImpl_klass())) {
3327 return JNIHandles::make_local(THREAD, loader);
3328 }
3329 }
3330 }
3331 return nullptr;
3332 JVM_END
3333
3334
3335 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3336
3337
3338 // resolve array handle and check arguments
3339 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3340 if (arr == nullptr) {
3341 THROW_0(vmSymbols::java_lang_NullPointerException());
3342 }
3343 oop a = JNIHandles::resolve_non_null(arr);
3344 if (!a->is_array()) {
3345 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3346 } else if (type_array_only && !a->is_typeArray()) {
3347 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3348 }
3349 return arrayOop(a);
3350 }
3351
3352
3353 JVM_ENTRY_PROF(jint, JVM_GetArrayLength, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3354 arrayOop a = check_array(env, arr, false, CHECK_0);
3355 return a->length();
3356 JVM_END
3357
3358
3359 JVM_ENTRY_PROF(jobject, JVM_GetArrayElement, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3360 JvmtiVMObjectAllocEventCollector oam;
3361 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3362 jvalue value;
3363 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3364 oop box = Reflection::box(&value, type, CHECK_NULL);
3365 return JNIHandles::make_local(THREAD, box);
3366 JVM_END
3367
3368
3369 JVM_ENTRY_PROF(jvalue, JVM_GetPrimitiveArrayElement, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3370 jvalue value;
3371 value.i = 0; // to initialize value before getting used in CHECK
3372 arrayOop a = check_array(env, arr, true, CHECK_(value));
3373 assert(a->is_typeArray(), "just checking");
3374 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3375 BasicType wide_type = (BasicType) wCode;
3376 if (type != wide_type) {
3377 Reflection::widen(&value, type, wide_type, CHECK_(value));
3378 }
3379 return value;
3380 JVM_END
3381
3382
3383 JVM_ENTRY_PROF(void, JVM_SetArrayElement, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3384 arrayOop a = check_array(env, arr, false, CHECK);
3385 oop box = JNIHandles::resolve(val);
3386 jvalue value;
3387 value.i = 0; // to initialize value before getting used in CHECK
3388 BasicType value_type;
3389 if (a->is_objArray()) {
3390 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3391 value_type = Reflection::unbox_for_regular_object(box, &value);
3392 } else {
3393 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3394 }
3395 Reflection::array_set(&value, a, index, value_type, CHECK);
3396 JVM_END
3397
3398
3399 JVM_ENTRY_PROF(void, JVM_SetPrimitiveArrayElement, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3400 arrayOop a = check_array(env, arr, true, CHECK);
3401 assert(a->is_typeArray(), "just checking");
3402 BasicType value_type = (BasicType) vCode;
3403 Reflection::array_set(&v, a, index, value_type, CHECK);
3404 JVM_END
3405
3406
3407 JVM_ENTRY_PROF(jobject, JVM_NewArray, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3408 JvmtiVMObjectAllocEventCollector oam;
3409 oop element_mirror = JNIHandles::resolve(eltClass);
3410 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3411 return JNIHandles::make_local(THREAD, result);
3412 JVM_END
3413
3414
3415 JVM_ENTRY_PROF(jobject, JVM_NewMultiArray, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3416 JvmtiVMObjectAllocEventCollector oam;
3417 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3418 oop element_mirror = JNIHandles::resolve(eltClass);
3419 assert(dim_array->is_typeArray(), "just checking");
3420 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3421 return JNIHandles::make_local(THREAD, result);
3422 JVM_END
3423
3424
3425 // Library support ///////////////////////////////////////////////////////////////////////////
3426
3427 JVM_LEAF_PROF(void*, JVM_LoadZipLibrary, JVM_LoadZipLibrary())
3428 return ZipLibrary::handle();
3429 JVM_END
3430
3431 JVM_ENTRY_NO_ENV_PROF(void*, JVM_LoadLibrary, JVM_LoadLibrary(const char* name, jboolean throwException))
3432 //%note jvm_ct
3433 char ebuf[1024];
3434 void *load_result;
3435 {
3436 ThreadToNativeFromVM ttnfvm(thread);
3437 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3438 }
3439 if (load_result == nullptr) {
3440 if (throwException) {
3441 char msg[1024];
3442 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3443 // Since 'ebuf' may contain a string encoded using
3444 // platform encoding scheme, we need to pass
3445 // Exceptions::unsafe_to_utf8 to the new_exception method
3446 // as the last argument. See bug 6367357.
3447 Handle h_exception =
3448 Exceptions::new_exception(thread,
3449 vmSymbols::java_lang_UnsatisfiedLinkError(),
3450 msg, Exceptions::unsafe_to_utf8);
3451
3452 THROW_HANDLE_0(h_exception);
3453 } else {
3454 log_info(library)("Failed to load library %s", name);
3455 return load_result;
3456 }
3457 }
3458 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3459 return load_result;
3460 JVM_END
3461
3462
3463 JVM_LEAF_PROF(void, JVM_UnloadLibrary, JVM_UnloadLibrary(void* handle))
3464 os::dll_unload(handle);
3465 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3466 JVM_END
3467
3468
3469 JVM_LEAF_PROF(void*, JVM_FindLibraryEntry, JVM_FindLibraryEntry(void* handle, const char* name))
3470 void* find_result = os::dll_lookup(handle, name);
3471 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3472 find_result != nullptr ? "Found" : "Failed to find",
3473 name, p2i(handle));
3474 return find_result;
3475 JVM_END
3476
3477
3478 // JNI version ///////////////////////////////////////////////////////////////////////////////
3479
3480 JVM_LEAF_PROF(jboolean, JVM_IsSupportedJNIVersion, JVM_IsSupportedJNIVersion(jint version))
3481 return Threads::is_supported_jni_version_including_1_1(version);
3482 JVM_END
3483
3484
3485 JVM_LEAF_PROF(jboolean, JVM_IsPreviewEnabled, JVM_IsPreviewEnabled(void))
3486 return Arguments::enable_preview() ? JNI_TRUE : JNI_FALSE;
3487 JVM_END
3488
3489 JVM_LEAF_PROF(jboolean, JVM_IsContinuationsSupported, JVM_IsContinuationsSupported(void))
3490 return VMContinuations ? JNI_TRUE : JNI_FALSE;
3491 JVM_END
3492
3493 JVM_LEAF_PROF(jboolean, JVM_IsForeignLinkerSupported, JVM_IsForeignLinkerSupported(void))
3494 return ForeignGlobals::is_foreign_linker_supported() ? JNI_TRUE : JNI_FALSE;
3495 JVM_END
3496
3497 // String support ///////////////////////////////////////////////////////////////////////////
3498
3499 JVM_ENTRY_PROF(jstring, JVM_InternString, JVM_InternString(JNIEnv *env, jstring str))
3500 JvmtiVMObjectAllocEventCollector oam;
3501 if (str == nullptr) return nullptr;
3502 oop string = JNIHandles::resolve_non_null(str);
3503 oop result = StringTable::intern(string, CHECK_NULL);
3504 return (jstring) JNIHandles::make_local(THREAD, result);
3505 JVM_END
3506
3507
3508 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3509
3510 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3511 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3512 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3513 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3514 // nature. JavaThreads will be "in native" when using this API from JDK code.
3515
3516
3517 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3518 VM_Exit::block_if_vm_exited();
3519 return new PlatformMutex();
3520 }
3521
3522
3523 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3524 VM_Exit::block_if_vm_exited();
3525 delete ((PlatformMutex*) mon);
3526 }
3527
3528
3529 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3530 VM_Exit::block_if_vm_exited();
3531 ((PlatformMutex*) mon)->lock();
3532 return 0;
3533 }
3534
3535
3536 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3537 VM_Exit::block_if_vm_exited();
3538 ((PlatformMutex*) mon)->unlock();
3539 }
3540
3541
3542 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3543
3544 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3545 Handle loader, Handle protection_domain,
3546 jboolean throwError, TRAPS) {
3547 // Security Note:
3548 // The Java level wrapper will perform the necessary security check allowing
3549 // us to pass the null as the initiating class loader. The VM is responsible for
3550 // the checkPackageAccess relative to the initiating class loader via the
3551 // protection_domain. The protection_domain is passed as null by the java code
3552 // if there is no security manager in 3-arg Class.forName().
3553 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3554
3555 // Check if we should initialize the class
3556 if (init && klass->is_instance_klass()) {
3557 klass->initialize(CHECK_NULL);
3558 }
3559 return (jclass) JNIHandles::make_local(THREAD, klass->java_mirror());
3560 }
3561
3562
3563 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3564
3565 JVM_ENTRY_PROF(jobject, JVM_InvokeMethod, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3566 Handle method_handle;
3567 if (thread->stack_overflow_state()->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3568 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3569 Handle receiver(THREAD, JNIHandles::resolve(obj));
3570 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3571 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3572 jobject res = JNIHandles::make_local(THREAD, result);
3573 if (JvmtiExport::should_post_vm_object_alloc()) {
3574 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3575 assert(ret_type != nullptr, "sanity check: ret_type oop must not be null!");
3576 if (java_lang_Class::is_primitive(ret_type)) {
3577 // Only for primitive type vm allocates memory for java object.
3578 // See box() method.
3579 JvmtiExport::post_vm_object_alloc(thread, result);
3580 }
3581 }
3582 return res;
3583 } else {
3584 THROW_0(vmSymbols::java_lang_StackOverflowError());
3585 }
3586 JVM_END
3587
3588
3589 JVM_ENTRY_PROF(jobject, JVM_NewInstanceFromConstructor, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3590 oop constructor_mirror = JNIHandles::resolve(c);
3591 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3592 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3593 jobject res = JNIHandles::make_local(THREAD, result);
3594 if (JvmtiExport::should_post_vm_object_alloc()) {
3595 JvmtiExport::post_vm_object_alloc(thread, result);
3596 }
3597 return res;
3598 JVM_END
3599
3600 JVM_ENTRY_PROF(void, JVM_InitializeFromArchive, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3602 assert(k->is_klass(), "just checking");
3603 HeapShared::initialize_from_archived_subgraph(THREAD, k);
3604 JVM_END
3605
3606 JVM_ENTRY_PROF(void, JVM_RegisterLambdaProxyClassForArchiving, JVM_RegisterLambdaProxyClassForArchiving(JNIEnv* env,
3607 jclass caller,
3608 jstring interfaceMethodName,
3609 jobject factoryType,
3610 jobject interfaceMethodType,
3611 jobject implementationMember,
3612 jobject dynamicMethodType,
3613 jclass lambdaProxyClass))
3614 #if INCLUDE_CDS
3615 if (!CDSConfig::is_dumping_archive()) {
3616 return;
3617 }
3618
3619 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3620 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3621 if (caller_ik->is_hidden()) {
3622 // Hidden classes not of type lambda proxy classes are currently not being archived.
3623 // If the caller_ik is of one of the above types, the corresponding lambda proxy class won't be
3624 // registered for archiving.
3625 return;
3626 }
3627 Klass* lambda_k = java_lang_Class::as_Klass(JNIHandles::resolve(lambdaProxyClass));
3628 InstanceKlass* lambda_ik = InstanceKlass::cast(lambda_k);
3629 assert(lambda_ik->is_hidden(), "must be a hidden class");
3630 assert(!lambda_ik->is_non_strong_hidden(), "expected a strong hidden class");
3631
3632 Symbol* interface_method_name = nullptr;
3633 if (interfaceMethodName != nullptr) {
3634 interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3635 }
3636 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3637 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3638
3639 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3640 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3641
3642 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3643 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3644 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3645
3646 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3647 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3648
3649 SystemDictionaryShared::add_lambda_proxy_class(caller_ik, lambda_ik, interface_method_name, factory_type,
3650 interface_method_type, m, dynamic_method_type, THREAD);
3651 #endif // INCLUDE_CDS
3652 JVM_END
3653
3654 JVM_ENTRY_PROF(jclass, JVM_LookupLambdaProxyClassFromArchive, JVM_LookupLambdaProxyClassFromArchive(JNIEnv* env,
3655 jclass caller,
3656 jstring interfaceMethodName,
3657 jobject factoryType,
3658 jobject interfaceMethodType,
3659 jobject implementationMember,
3660 jobject dynamicMethodType))
3661 #if INCLUDE_CDS
3662
3663 if (interfaceMethodName == nullptr || factoryType == nullptr || interfaceMethodType == nullptr ||
3664 implementationMember == nullptr || dynamicMethodType == nullptr) {
3665 THROW_(vmSymbols::java_lang_NullPointerException(), nullptr);
3666 }
3667
3668 Klass* caller_k = java_lang_Class::as_Klass(JNIHandles::resolve(caller));
3669 InstanceKlass* caller_ik = InstanceKlass::cast(caller_k);
3670 if (!caller_ik->is_shared()) {
3671 // there won't be a shared lambda class if the caller_ik is not in the shared archive.
3672 return nullptr;
3673 }
3674
3675 Symbol* interface_method_name = java_lang_String::as_symbol(JNIHandles::resolve_non_null(interfaceMethodName));
3676 Handle factory_type_oop(THREAD, JNIHandles::resolve_non_null(factoryType));
3677 Symbol* factory_type = java_lang_invoke_MethodType::as_signature(factory_type_oop(), true);
3678
3679 Handle interface_method_type_oop(THREAD, JNIHandles::resolve_non_null(interfaceMethodType));
3680 Symbol* interface_method_type = java_lang_invoke_MethodType::as_signature(interface_method_type_oop(), true);
3681
3682 Handle implementation_member_oop(THREAD, JNIHandles::resolve_non_null(implementationMember));
3683 assert(java_lang_invoke_MemberName::is_method(implementation_member_oop()), "must be");
3684 Method* m = java_lang_invoke_MemberName::vmtarget(implementation_member_oop());
3685
3686 Handle dynamic_method_type_oop(THREAD, JNIHandles::resolve_non_null(dynamicMethodType));
3687 Symbol* dynamic_method_type = java_lang_invoke_MethodType::as_signature(dynamic_method_type_oop(), true);
3688
3689 InstanceKlass* lambda_ik = SystemDictionaryShared::get_shared_lambda_proxy_class(caller_ik, interface_method_name, factory_type,
3690 interface_method_type, m, dynamic_method_type);
3691 jclass jcls = nullptr;
3692 if (lambda_ik != nullptr) {
3693 InstanceKlass* loaded_lambda = SystemDictionaryShared::prepare_shared_lambda_proxy_class(lambda_ik, caller_ik, THREAD);
3694 jcls = loaded_lambda == nullptr ? nullptr : (jclass) JNIHandles::make_local(THREAD, loaded_lambda->java_mirror());
3695 }
3696 return jcls;
3697 #else
3698 return nullptr;
3699 #endif // INCLUDE_CDS
3700 JVM_END
3701
3702 JVM_ENTRY_NO_ENV_PROF(jlong, JVM_GetRandomSeedForDumping, JVM_GetRandomSeedForDumping())
3703 if (CDSConfig::is_dumping_static_archive()) {
3704 // We do this so that the default CDS archive can be deterministic.
3705 const char* release = VM_Version::vm_release();
3706 const char* dbg_level = VM_Version::jdk_debug_level();
3707 const char* version = VM_Version::internal_vm_info_string();
3708 jlong seed = (jlong)(java_lang_String::hash_code((const jbyte*)release, (int)strlen(release)) ^
3709 java_lang_String::hash_code((const jbyte*)dbg_level, (int)strlen(dbg_level)) ^
3710 java_lang_String::hash_code((const jbyte*)version, (int)strlen(version)));
3711 seed += (jlong)VM_Version::vm_major_version();
3712 seed += (jlong)VM_Version::vm_minor_version();
3713 seed += (jlong)VM_Version::vm_security_version();
3714 seed += (jlong)VM_Version::vm_patch_version();
3715 if (seed == 0) { // don't let this ever be zero.
3716 seed = 0x87654321;
3717 }
3718 log_debug(cds)("JVM_GetRandomSeedForDumping() = " JLONG_FORMAT, seed);
3719 return seed;
3720 } else {
3721 return 0;
3722 }
3723 JVM_END
3724
3725 JVM_ENTRY_NO_ENV_PROF(jint, JVM_GetCDSConfigStatus, JVM_GetCDSConfigStatus())
3726 return CDSConfig::get_status();
3727 JVM_END
3728
3729 JVM_ENTRY_PROF(void, JVM_LogLambdaFormInvoker, JVM_LogLambdaFormInvoker(JNIEnv *env, jstring line))
3730 #if INCLUDE_CDS
3731 assert(CDSConfig::is_logging_lambda_form_invokers(), "sanity");
3732 if (line != nullptr) {
3733 ResourceMark rm(THREAD);
3734 Handle h_line (THREAD, JNIHandles::resolve_non_null(line));
3735 char* c_line = java_lang_String::as_utf8_string(h_line());
3736 if (CDSConfig::is_dumping_dynamic_archive() || CDSConfig::is_dumping_preimage_static_archive()) {
3737 // Note: LambdaFormInvokers::append take same format which is not
3738 // same as below the print format. The line does not include LAMBDA_FORM_TAG.
3739 LambdaFormInvokers::append(os::strdup((const char*)c_line, mtInternal));
3740 }
3741 if (ClassListWriter::is_enabled()) {
3742 ClassListWriter w;
3743 w.stream()->print_cr("%s %s", ClassListParser::lambda_form_tag(), c_line);
3744 }
3745 }
3746 #endif // INCLUDE_CDS
3747 JVM_END
3748
3749 JVM_ENTRY_PROF(void, JVM_LogDynamicProxy, JVM_LogDynamicProxy(JNIEnv *env, jobject loader, jstring proxy_name, jobjectArray interfaces, jint access_flags))
3750 #if INCLUDE_CDS
3751 assert(CDSConfig::is_tracing_dynamic_proxy(), "sanity");
3752
3753 ResourceMark rm(THREAD);
3754 oop proxy_name_oop = JNIHandles::resolve_non_null(proxy_name);
3755 char* proxy_name_str = java_lang_String::as_utf8_string(proxy_name_oop);
3756 oop loader_oop = JNIHandles::resolve(loader);
3757 objArrayOop interfaces_oop = objArrayOop(JNIHandles::resolve_non_null(interfaces));
3758
3759 ClassPrelinker::trace_dynamic_proxy_class(loader_oop, proxy_name_str, interfaces_oop, access_flags);
3760 #endif // INCLUDE_CDS
3761 JVM_END
3762
3763 JVM_ENTRY_PROF(void, JVM_DumpClassListToFile, JVM_DumpClassListToFile(JNIEnv *env, jstring listFileName))
3764 #if INCLUDE_CDS
3765 ResourceMark rm(THREAD);
3766 Handle file_handle(THREAD, JNIHandles::resolve_non_null(listFileName));
3767 char* file_name = java_lang_String::as_utf8_string(file_handle());
3768 MetaspaceShared::dump_loaded_classes(file_name, THREAD);
3769 #endif // INCLUDE_CDS
3770 JVM_END
3771
3772 JVM_ENTRY_PROF(void, JVM_DumpDynamicArchive, JVM_DumpDynamicArchive(JNIEnv *env, jstring archiveName))
3773 #if INCLUDE_CDS
3774 ResourceMark rm(THREAD);
3775 Handle file_handle(THREAD, JNIHandles::resolve_non_null(archiveName));
3776 char* archive_name = java_lang_String::as_utf8_string(file_handle());
3777 DynamicArchive::dump_for_jcmd(archive_name, CHECK);
3778 #endif // INCLUDE_CDS
3779 JVM_END
3780
3781 // Returns an array of all live Thread objects (VM internal JavaThreads,
3782 // jvmti agent threads, and JNI attaching threads are skipped)
3783 // See CR 6404306 regarding JNI attaching threads
3784 JVM_ENTRY_PROF(jobjectArray, JVM_GetAllThreads, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3785 ResourceMark rm(THREAD);
3786 ThreadsListEnumerator tle(THREAD, false, false);
3787 JvmtiVMObjectAllocEventCollector oam;
3788
3789 int num_threads = tle.num_threads();
3790 objArrayOop r = oopFactory::new_objArray(vmClasses::Thread_klass(), num_threads, CHECK_NULL);
3791 objArrayHandle threads_ah(THREAD, r);
3792
3793 for (int i = 0; i < num_threads; i++) {
3794 Handle h = tle.get_threadObj(i);
3795 threads_ah->obj_at_put(i, h());
3796 }
3797
3798 return (jobjectArray) JNIHandles::make_local(THREAD, threads_ah());
3799 JVM_END
3800
3801
3802 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3803 // Return StackTraceElement[][], each element is the stack trace of a thread in
3804 // the corresponding entry in the given threads array
3805 JVM_ENTRY_PROF(jobjectArray, JVM_DumpThreads, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3806 JvmtiVMObjectAllocEventCollector oam;
3807
3808 // Check if threads is null
3809 if (threads == nullptr) {
3810 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3811 }
3812
3813 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3814 objArrayHandle ah(THREAD, a);
3815 int num_threads = ah->length();
3816 // check if threads is non-empty array
3817 if (num_threads == 0) {
3818 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3819 }
3820
3821 // check if threads is not an array of objects of Thread class
3822 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3823 if (k != vmClasses::Thread_klass()) {
3824 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3825 }
3826
3827 ResourceMark rm(THREAD);
3828
3829 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3830 for (int i = 0; i < num_threads; i++) {
3831 oop thread_obj = ah->obj_at(i);
3832 instanceHandle h(THREAD, (instanceOop) thread_obj);
3833 thread_handle_array->append(h);
3834 }
3835
3836 // The JavaThread references in thread_handle_array are validated
3837 // in VM_ThreadDump::doit().
3838 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3839 return (jobjectArray)JNIHandles::make_local(THREAD, stacktraces());
3840
3841 JVM_END
3842
3843 // JVM monitoring and management support
3844 JVM_LEAF_PROF(void*, JVM_GetManagement, JVM_GetManagement(jint version))
3845 return Management::get_jmm_interface(version);
3846 JVM_END
3847
3848 // com.sun.tools.attach.VirtualMachine agent properties support
3849 //
3850 // Initialize the agent properties with the properties maintained in the VM
3851 JVM_ENTRY_PROF(jobject, JVM_InitAgentProperties, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3852 ResourceMark rm;
3853
3854 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3855
3856 PUTPROP(props, "sun.java.command", Arguments::java_command());
3857 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3858 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3859 return properties;
3860 JVM_END
3861
3862 JVM_ENTRY_PROF(jobjectArray, JVM_GetEnclosingMethodInfo, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3863 {
3864 JvmtiVMObjectAllocEventCollector oam;
3865
3866 if (ofClass == nullptr) {
3867 return nullptr;
3868 }
3869 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3870 // Special handling for primitive objects
3871 if (java_lang_Class::is_primitive(mirror())) {
3872 return nullptr;
3873 }
3874 Klass* k = java_lang_Class::as_Klass(mirror());
3875 if (!k->is_instance_klass()) {
3876 return nullptr;
3877 }
3878 InstanceKlass* ik = InstanceKlass::cast(k);
3879 int encl_method_class_idx = ik->enclosing_method_class_index();
3880 if (encl_method_class_idx == 0) {
3881 return nullptr;
3882 }
3883 objArrayOop dest_o = oopFactory::new_objArray(vmClasses::Object_klass(), 3, CHECK_NULL);
3884 objArrayHandle dest(THREAD, dest_o);
3885 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3886 dest->obj_at_put(0, enc_k->java_mirror());
3887 int encl_method_method_idx = ik->enclosing_method_method_index();
3888 if (encl_method_method_idx != 0) {
3889 Symbol* sym = ik->constants()->symbol_at(
3890 extract_low_short_from_int(
3891 ik->constants()->name_and_type_at(encl_method_method_idx)));
3892 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3893 dest->obj_at_put(1, str());
3894 sym = ik->constants()->symbol_at(
3895 extract_high_short_from_int(
3896 ik->constants()->name_and_type_at(encl_method_method_idx)));
3897 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3898 dest->obj_at_put(2, str());
3899 }
3900 return (jobjectArray) JNIHandles::make_local(THREAD, dest());
3901 }
3902 JVM_END
3903
3904 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3905 JVM_ENTRY_PROF(jobjectArray, JVM_GetVmArguments, JVM_GetVmArguments(JNIEnv *env))
3906 ResourceMark rm(THREAD);
3907
3908 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3909 return nullptr;
3910 }
3911
3912 char** vm_flags = Arguments::jvm_flags_array();
3913 char** vm_args = Arguments::jvm_args_array();
3914 int num_flags = Arguments::num_jvm_flags();
3915 int num_args = Arguments::num_jvm_args();
3916
3917 InstanceKlass* ik = vmClasses::String_klass();
3918 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3919 objArrayHandle result_h(THREAD, r);
3920
3921 int index = 0;
3922 for (int j = 0; j < num_flags; j++, index++) {
3923 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3924 result_h->obj_at_put(index, h());
3925 }
3926 for (int i = 0; i < num_args; i++, index++) {
3927 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3928 result_h->obj_at_put(index, h());
3929 }
3930 return (jobjectArray) JNIHandles::make_local(THREAD, result_h());
3931 JVM_END
3932
3933 JVM_LEAF_PROF(jint, JVM_FindSignal, JVM_FindSignal(const char *name))
3934 return os::get_signal_number(name);
3935 JVM_END
3936
3937 JVM_ENTRY_PROF(void, JVM_VirtualThreadStart, JVM_VirtualThreadStart(JNIEnv* env, jobject vthread))
3938 #if INCLUDE_JVMTI
3939 if (!DoJVMTIVirtualThreadTransitions) {
3940 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3941 return;
3942 }
3943 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3944 JvmtiVTMSTransitionDisabler::VTMS_vthread_start(vthread);
3945 } else {
3946 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3947 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, false);
3948 }
3949 #endif
3950 JVM_END
3951
3952 JVM_ENTRY_PROF(void, JVM_VirtualThreadEnd, JVM_VirtualThreadEnd(JNIEnv* env, jobject vthread))
3953 #if INCLUDE_JVMTI
3954 if (!DoJVMTIVirtualThreadTransitions) {
3955 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3956 return;
3957 }
3958 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3959 JvmtiVTMSTransitionDisabler::VTMS_vthread_end(vthread);
3960 } else {
3961 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3962 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, true);
3963 }
3964 #endif
3965 JVM_END
3966
3967 // If notifications are disabled then just update the VTMS transition bit and return.
3968 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call.
3969 JVM_ENTRY_PROF(void, JVM_VirtualThreadMount, JVM_VirtualThreadMount(JNIEnv* env, jobject vthread, jboolean hide))
3970 #if INCLUDE_JVMTI
3971 if (!DoJVMTIVirtualThreadTransitions) {
3972 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3973 return;
3974 }
3975 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3976 JvmtiVTMSTransitionDisabler::VTMS_vthread_mount(vthread, hide);
3977 } else {
3978 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3979 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3980 }
3981 #endif
3982 JVM_END
3983
3984 // If notifications are disabled then just update the VTMS transition bit and return.
3985 // Otherwise, the bit is updated in the given jvmtiVTMSTransitionDisabler function call below.
3986 JVM_ENTRY_PROF(void, JVM_VirtualThreadUnmount, JVM_VirtualThreadUnmount(JNIEnv* env, jobject vthread, jboolean hide))
3987 #if INCLUDE_JVMTI
3988 if (!DoJVMTIVirtualThreadTransitions) {
3989 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
3990 return;
3991 }
3992 if (JvmtiVTMSTransitionDisabler::VTMS_notify_jvmti_events()) {
3993 JvmtiVTMSTransitionDisabler::VTMS_vthread_unmount(vthread, hide);
3994 } else {
3995 // set VTMS transition bit value in JavaThread and java.lang.VirtualThread object
3996 JvmtiVTMSTransitionDisabler::set_is_in_VTMS_transition(thread, vthread, hide);
3997 }
3998 #endif
3999 JVM_END
4000
4001 // Always update the temporary VTMS transition bit.
4002 JVM_ENTRY_PROF(void, JVM_VirtualThreadHideFrames, JVM_VirtualThreadHideFrames(JNIEnv* env, jclass clazz, jboolean hide))
4003 #if INCLUDE_JVMTI
4004 if (!DoJVMTIVirtualThreadTransitions) {
4005 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
4006 return;
4007 }
4008 assert(!thread->is_in_VTMS_transition(), "sanity check");
4009 assert(thread->is_in_tmp_VTMS_transition() != (bool)hide, "sanity check");
4010 thread->toggle_is_in_tmp_VTMS_transition();
4011 #endif
4012 JVM_END
4013
4014 // Notification from VirtualThread about disabling JVMTI Suspend in a sync critical section.
4015 // Needed to avoid deadlocks with JVMTI suspend mechanism.
4016 JVM_ENTRY(void, JVM_VirtualThreadDisableSuspend(JNIEnv* env, jclass clazz, jboolean enter))
4017 #if INCLUDE_JVMTI
4018 if (!DoJVMTIVirtualThreadTransitions) {
4019 assert(!JvmtiExport::can_support_virtual_threads(), "sanity check");
4020 return;
4021 }
4022 assert(thread->is_disable_suspend() != (bool)enter,
4023 "nested or unbalanced monitor enter/exit is not allowed");
4024 thread->toggle_is_disable_suspend();
4025 #endif
4026 JVM_END
4027
4028 /*
4029 * Return the current class's class file version. The low order 16 bits of the
4030 * returned jint contain the class's major version. The high order 16 bits
4031 * contain the class's minor version.
4032 */
4033 JVM_ENTRY_PROF(jint, JVM_GetClassFileVersion, JVM_GetClassFileVersion(JNIEnv* env, jclass current))
4034 oop mirror = JNIHandles::resolve_non_null(current);
4035 if (java_lang_Class::is_primitive(mirror)) {
4036 // return latest major version and minor version of 0.
4037 return JVM_CLASSFILE_MAJOR_VERSION;
4038 }
4039 assert(!java_lang_Class::as_Klass(mirror)->is_array_klass(), "unexpected array class");
4040
4041 Klass* c = java_lang_Class::as_Klass(mirror);
4042 assert(c->is_instance_klass(), "must be");
4043 InstanceKlass* ik = InstanceKlass::cast(c);
4044 return (ik->minor_version() << 16) | ik->major_version();
4045 JVM_END
4046
4047 /*
4048 * Ensure that code doing a stackwalk and using javaVFrame::locals() to
4049 * get the value will see a materialized value and not a scalar-replaced
4050 * null value.
4051 */
4052 JVM_ENTRY_PROF(void, JVM_EnsureMaterializedForStackWalk_func, JVM_EnsureMaterializedForStackWalk_func(JNIEnv* env, jobject vthread, jobject value))
4053 JVM_EnsureMaterializedForStackWalk(env, value);
4054 JVM_END
4055
4056 /*
4057 * Return JNI_TRUE if warnings are printed when agents are dynamically loaded.
4058 */
4059 JVM_LEAF_PROF(jboolean, JVM_PrintWarningAtDynamicAgentLoad, JVM_PrintWarningAtDynamicAgentLoad(void))
4060 return (EnableDynamicAgentLoading && !FLAG_IS_CMDLINE(EnableDynamicAgentLoading)) ? JNI_TRUE : JNI_FALSE;
4061 JVM_END
4062
4063 #define DO_COUNTERS(macro) \
4064 macro(JVM_CurrentTimeMillis) \
4065 macro(JVM_NanoTime) \
4066 macro(JVM_GetNanoTimeAdjustment) \
4067 macro(JVM_ArrayCopy) \
4068 macro(JVM_GetProperties) \
4069 macro(JVM_GetTemporaryDirectory) \
4070 macro(JVM_BeforeHalt) \
4071 macro(JVM_Halt) \
4072 macro(JVM_GC) \
4073 macro(JVM_MaxObjectInspectionAge) \
4074 macro(JVM_TotalMemory) \
4075 macro(JVM_FreeMemory) \
4076 macro(JVM_MaxMemory) \
4077 macro(JVM_ActiveProcessorCount) \
4078 macro(JVM_IsUseContainerSupport) \
4079 macro(JVM_FillInStackTrace) \
4080 macro(JVM_GetExtendedNPEMessage) \
4081 macro(JVM_InitStackTraceElementArray) \
4082 macro(JVM_InitStackTraceElement) \
4083 macro(JVM_ExpandStackFrameInfo) \
4084 macro(JVM_CallStackWalk) \
4085 macro(JVM_MoreStackWalk) \
4086 macro(JVM_SetStackWalkContinuation) \
4087 macro(JVM_IHashCode) \
4088 macro(JVM_MonitorWait) \
4089 macro(JVM_MonitorNotify) \
4090 macro(JVM_MonitorNotifyAll) \
4091 macro(JVM_Clone) \
4092 macro(JVM_ReportFinalizationComplete) \
4093 macro(JVM_IsFinalizationEnabled) \
4094 macro(JVM_RegisterContinuationMethods) \
4095 macro(JVM_NativePath) \
4096 macro(JVM_GetCallerClass) \
4097 macro(JVM_FindPrimitiveClass) \
4098 macro(JVM_FindClassFromBootLoader) \
4099 macro(JVM_FindClassFromCaller) \
4100 macro(JVM_FindClassFromClass) \
4101 macro(JVM_DefineClass) \
4102 macro(JVM_LookupDefineClass) \
4103 macro(JVM_DefineClassWithSource) \
4104 macro(JVM_FindLoadedClass) \
4105 macro(JVM_DefineModule) \
4106 macro(JVM_SetBootLoaderUnnamedModule) \
4107 macro(JVM_AddModuleExports) \
4108 macro(JVM_AddModuleExportsToAllUnnamed) \
4109 macro(JVM_AddModuleExportsToAll) \
4110 macro(JVM_AddReadsModule) \
4111 macro(JVM_DefineArchivedModules) \
4112 macro(JVM_InitClassName) \
4113 macro(JVM_GetClassInterfaces) \
4114 macro(JVM_IsInterface) \
4115 macro(JVM_IsHiddenClass) \
4116 macro(JVM_GetClassSigners) \
4117 macro(JVM_SetClassSigners) \
4118 macro(JVM_GetProtectionDomain) \
4119 macro(JVM_GetInheritedAccessControlContext) \
4120 macro(JVM_GetStackAccessControlContext) \
4121 macro(JVM_FindScopedValueBindings) \
4122 macro(JVM_IsArrayClass) \
4123 macro(JVM_IsPrimitiveClass) \
4124 macro(JVM_GetClassModifiers) \
4125 macro(JVM_GetDeclaredClasses) \
4126 macro(JVM_GetDeclaringClass) \
4127 macro(JVM_GetSimpleBinaryName) \
4128 macro(JVM_GetClassSignature) \
4129 macro(JVM_GetClassAnnotations) \
4130 macro(JVM_GetClassTypeAnnotations) \
4131 macro(JVM_GetMethodTypeAnnotations) \
4132 macro(JVM_GetFieldTypeAnnotations) \
4133 macro(JVM_GetMethodParameters) \
4134 macro(JVM_GetClassDeclaredFields) \
4135 macro(JVM_IsRecord) \
4136 macro(JVM_GetRecordComponents) \
4137 macro(JVM_GetClassDeclaredMethods) \
4138 macro(JVM_GetClassDeclaredConstructors) \
4139 macro(JVM_GetClassAccessFlags) \
4140 macro(JVM_AreNestMates) \
4141 macro(JVM_GetNestHost) \
4142 macro(JVM_GetNestMembers) \
4143 macro(JVM_GetPermittedSubclasses) \
4144 macro(JVM_GetClassConstantPool) \
4145 macro(JVM_ConstantPoolGetSize) \
4146 macro(JVM_ConstantPoolGetClassAt) \
4147 macro(JVM_ConstantPoolGetClassAtIfLoaded) \
4148 macro(JVM_ConstantPoolGetMethodAt) \
4149 macro(JVM_ConstantPoolGetMethodAtIfLoaded) \
4150 macro(JVM_ConstantPoolGetFieldAt) \
4151 macro(JVM_ConstantPoolGetFieldAtIfLoaded) \
4152 macro(JVM_ConstantPoolGetMemberRefInfoAt) \
4153 macro(JVM_ConstantPoolGetClassRefIndexAt) \
4154 macro(JVM_ConstantPoolGetNameAndTypeRefIndexAt) \
4155 macro(JVM_ConstantPoolGetNameAndTypeRefInfoAt) \
4156 macro(JVM_ConstantPoolGetIntAt) \
4157 macro(JVM_ConstantPoolGetLongAt) \
4158 macro(JVM_ConstantPoolGetFloatAt) \
4159 macro(JVM_ConstantPoolGetDoubleAt) \
4160 macro(JVM_ConstantPoolGetStringAt) \
4161 macro(JVM_ConstantPoolGetUTF8At) \
4162 macro(JVM_ConstantPoolGetTagAt) \
4163 macro(JVM_DesiredAssertionStatus) \
4164 macro(JVM_AssertionStatusDirectives) \
4165 macro(JVM_GetClassNameUTF) \
4166 macro(JVM_GetClassCPTypes) \
4167 macro(JVM_GetClassCPEntriesCount) \
4168 macro(JVM_GetClassFieldsCount) \
4169 macro(JVM_GetClassMethodsCount) \
4170 macro(JVM_GetMethodIxExceptionIndexes) \
4171 macro(JVM_GetMethodIxExceptionsCount) \
4172 macro(JVM_GetMethodIxByteCode) \
4173 macro(JVM_GetMethodIxByteCodeLength) \
4174 macro(JVM_GetMethodIxExceptionTableEntry) \
4175 macro(JVM_GetMethodIxExceptionTableLength) \
4176 macro(JVM_GetMethodIxModifiers) \
4177 macro(JVM_GetFieldIxModifiers) \
4178 macro(JVM_GetMethodIxLocalsCount) \
4179 macro(JVM_GetMethodIxArgsSize) \
4180 macro(JVM_GetMethodIxMaxStack) \
4181 macro(JVM_IsConstructorIx) \
4182 macro(JVM_IsVMGeneratedMethodIx) \
4183 macro(JVM_GetMethodIxNameUTF) \
4184 macro(JVM_GetMethodIxSignatureUTF) \
4185 macro(JVM_GetCPFieldNameUTF) \
4186 macro(JVM_GetCPMethodNameUTF) \
4187 macro(JVM_GetCPMethodSignatureUTF) \
4188 macro(JVM_GetCPFieldSignatureUTF) \
4189 macro(JVM_GetCPClassNameUTF) \
4190 macro(JVM_GetCPFieldClassNameUTF) \
4191 macro(JVM_GetCPMethodClassNameUTF) \
4192 macro(JVM_GetCPFieldModifiers) \
4193 macro(JVM_GetCPMethodModifiers) \
4194 macro(JVM_ReleaseUTF) \
4195 macro(JVM_IsSameClassPackage) \
4196 macro(JVM_StartThread) \
4197 macro(JVM_SetThreadPriority) \
4198 macro(JVM_Yield) \
4199 macro(JVM_SleepNanos) \
4200 macro(JVM_CurrentCarrierThread) \
4201 macro(JVM_CurrentThread) \
4202 macro(JVM_SetCurrentThread) \
4203 macro(JVM_GetNextThreadIdOffset) \
4204 macro(JVM_Interrupt) \
4205 macro(JVM_HoldsLock) \
4206 macro(JVM_GetStackTrace) \
4207 macro(JVM_DumpAllStacks) \
4208 macro(JVM_SetNativeThreadName) \
4209 macro(JVM_ScopedValueCache) \
4210 macro(JVM_SetScopedValueCache) \
4211 macro(JVM_GetClassContext) \
4212 macro(JVM_GetSystemPackage) \
4213 macro(JVM_GetSystemPackages) \
4214 macro(JVM_GetAndClearReferencePendingList) \
4215 macro(JVM_HasReferencePendingList) \
4216 macro(JVM_WaitForReferencePendingList) \
4217 macro(JVM_ReferenceRefersTo) \
4218 macro(JVM_ReferenceClear) \
4219 macro(JVM_PhantomReferenceRefersTo) \
4220 macro(JVM_LatestUserDefinedLoader) \
4221 macro(JVM_GetArrayLength) \
4222 macro(JVM_GetArrayElement) \
4223 macro(JVM_GetPrimitiveArrayElement) \
4224 macro(JVM_SetArrayElement) \
4225 macro(JVM_SetPrimitiveArrayElement) \
4226 macro(JVM_NewArray) \
4227 macro(JVM_NewMultiArray) \
4228 macro(JVM_LoadZipLibrary) \
4229 macro(JVM_LoadLibrary) \
4230 macro(JVM_UnloadLibrary) \
4231 macro(JVM_FindLibraryEntry) \
4232 macro(JVM_IsSupportedJNIVersion) \
4233 macro(JVM_IsPreviewEnabled) \
4234 macro(JVM_IsContinuationsSupported) \
4235 macro(JVM_IsForeignLinkerSupported) \
4236 macro(JVM_InternString) \
4237 macro(JVM_InvokeMethod) \
4238 macro(JVM_NewInstanceFromConstructor) \
4239 macro(JVM_InitializeFromArchive) \
4240 macro(JVM_RegisterLambdaProxyClassForArchiving) \
4241 macro(JVM_LookupLambdaProxyClassFromArchive) \
4242 macro(JVM_GetRandomSeedForDumping) \
4243 macro(JVM_LogLambdaFormInvoker) \
4244 macro(JVM_LogDynamicProxy) \
4245 macro(JVM_DumpClassListToFile) \
4246 macro(JVM_DumpDynamicArchive) \
4247 macro(JVM_GetAllThreads) \
4248 macro(JVM_DumpThreads) \
4249 macro(JVM_GetManagement) \
4250 macro(JVM_InitAgentProperties) \
4251 macro(JVM_GetEnclosingMethodInfo) \
4252 macro(JVM_GetVmArguments) \
4253 macro(JVM_FindSignal) \
4254 macro(JVM_VirtualThreadStart) \
4255 macro(JVM_VirtualThreadEnd) \
4256 macro(JVM_VirtualThreadMount) \
4257 macro(JVM_VirtualThreadUnmount) \
4258 macro(JVM_VirtualThreadHideFrames) \
4259 macro(JVM_GetClassFileVersion) \
4260 macro(JVM_EnsureMaterializedForStackWalk_func) \
4261 macro(JVM_PrintWarningAtDynamicAgentLoad)
4262
4263 #define INIT_COUNTER(name) \
4264 NEWPERFTICKCOUNTERS(_perf_##name##_timer, SUN_RT, #name); \
4265 NEWPERFEVENTCOUNTER(_perf_##name##_count, SUN_RT, #name "_count"); \
4266
4267 void perf_jvm_init() {
4268 if (ProfileVMCalls && UsePerfData) {
4269 EXCEPTION_MARK;
4270
4271 DO_COUNTERS(INIT_COUNTER)
4272
4273 if (HAS_PENDING_EXCEPTION) {
4274 vm_exit_during_initialization("jvm_perf_init failed unexpectedly");
4275 }
4276 }
4277 }
4278
4279 #undef INIT_COUNTER
4280
4281 #define PRINT_COUNTER(name) {\
4282 jlong count = _perf_##name##_count->get_value(); \
4283 if (count > 0) { \
4284 st->print_cr(" %-40s = %4ldms (elapsed) %4ldms (thread) (%5ld events)", #name, \
4285 _perf_##name##_timer->elapsed_counter_value_ms(), _perf_##name##_timer->thread_counter_value_ms(), count); \
4286 }}
4287
4288 void perf_jvm_print_on(outputStream* st) {
4289 if (ProfileVMCalls && UsePerfData) {
4290 DO_COUNTERS(PRINT_COUNTER)
4291 } else {
4292 st->print_cr(" JVM: no info (%s is disabled)", (UsePerfData ? "ProfileVMCalls" : "UsePerfData"));
4293 }
4294 }
4295
4296 #undef PRINT_COUNTER