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