1 /*
2 * Copyright (c) 1997, 2020, 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 "jvm.h"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/javaAssertions.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/stringTable.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/collectedHeap.inline.hpp"
40 #include "interpreter/bytecode.hpp"
41 #include "interpreter/bytecodeUtils.hpp"
42 #include "jfr/jfrEvents.hpp"
43 #include "logging/log.hpp"
44 #include "memory/heapShared.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/referenceType.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/constantPool.hpp"
51 #include "oops/fieldStreams.inline.hpp"
52 #include "oops/instanceKlass.hpp"
53 #include "oops/method.hpp"
54 #include "oops/recordComponent.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "oops/valueArrayKlass.hpp"
59 #include "prims/jvm_misc.hpp"
60 #include "prims/jvmtiExport.hpp"
61 #include "prims/jvmtiThreadState.hpp"
62 #include "prims/nativeLookup.hpp"
63 #include "prims/stackwalk.hpp"
64 #include "runtime/arguments.hpp"
65 #include "runtime/atomic.hpp"
66 #include "runtime/handles.inline.hpp"
67 #include "runtime/init.hpp"
68 #include "runtime/interfaceSupport.inline.hpp"
69 #include "runtime/deoptimization.hpp"
70 #include "runtime/handshake.hpp"
71 #include "runtime/java.hpp"
72 #include "runtime/javaCalls.hpp"
73 #include "runtime/jfieldIDWorkaround.hpp"
74 #include "runtime/jniHandles.inline.hpp"
75 #include "runtime/os.inline.hpp"
76 #include "runtime/perfData.hpp"
77 #include "runtime/reflection.hpp"
78 #include "runtime/thread.inline.hpp"
79 #include "runtime/threadSMR.hpp"
80 #include "runtime/vframe.inline.hpp"
81 #include "runtime/vmOperations.hpp"
82 #include "runtime/vm_version.hpp"
83 #include "services/attachListener.hpp"
84 #include "services/management.hpp"
85 #include "services/threadService.hpp"
86 #include "utilities/copy.hpp"
87 #include "utilities/defaultStream.hpp"
88 #include "utilities/dtrace.hpp"
89 #include "utilities/events.hpp"
90 #include "utilities/histogram.hpp"
91 #include "utilities/macros.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_CDS
94 #include "classfile/systemDictionaryShared.hpp"
95 #endif
96
97 #include <errno.h>
98
99 /*
100 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
101 such ctors and calls MUST NOT come between an oop declaration/init and its
102 usage because if objects are move this may cause various memory stomps, bus
103 errors and segfaults. Here is a cookbook for causing so called "naked oop
104 failures":
105
106 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
107 JVMWrapper("JVM_GetClassDeclaredFields");
108
109 // Object address to be held directly in mirror & not visible to GC
110 oop mirror = JNIHandles::resolve_non_null(ofClass);
111
112 // If this ctor can hit a safepoint, moving objects around, then
113 ComplexConstructor foo;
114
115 // Boom! mirror may point to JUNK instead of the intended object
116 (some dereference of mirror)
117
118 // Here's another call that may block for GC, making mirror stale
119 MutexLocker ml(some_lock);
120
121 // And here's an initializer that can result in a stale oop
122 // all in one step.
123 oop o = call_that_can_throw_exception(TRAPS);
124
125
126 The solution is to keep the oop declaration BELOW the ctor or function
127 call that might cause a GC, do another resolve to reassign the oop, or
128 consider use of a Handle instead of an oop so there is immunity from object
129 motion. But note that the "QUICK" entries below do not have a handlemark
130 and thus can only support use of handles passed in.
131 */
132
133 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
134 ResourceMark rm;
135 int line_number = -1;
136 const char * source_file = NULL;
137 const char * trace = "explicit";
138 InstanceKlass* caller = NULL;
139 JavaThread* jthread = JavaThread::current();
140 if (jthread->has_last_Java_frame()) {
141 vframeStream vfst(jthread);
142
143 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
144 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
145 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
146 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
147 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
148
149 Method* last_caller = NULL;
150
151 while (!vfst.at_end()) {
152 Method* m = vfst.method();
153 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
154 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
155 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
156 break;
157 }
158 last_caller = m;
159 vfst.next();
160 }
161 // if this is called from Class.forName0 and that is called from Class.forName,
162 // then print the caller of Class.forName. If this is Class.loadClass, then print
163 // that caller, otherwise keep quiet since this should be picked up elsewhere.
164 bool found_it = false;
165 if (!vfst.at_end() &&
166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
167 vfst.method()->name() == vmSymbols::forName0_name()) {
168 vfst.next();
169 if (!vfst.at_end() &&
170 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
171 vfst.method()->name() == vmSymbols::forName_name()) {
172 vfst.next();
173 found_it = true;
174 }
175 } else if (last_caller != NULL &&
176 last_caller->method_holder()->name() ==
177 vmSymbols::java_lang_ClassLoader() &&
178 last_caller->name() == vmSymbols::loadClass_name()) {
179 found_it = true;
180 } else if (!vfst.at_end()) {
181 if (vfst.method()->is_native()) {
182 // JNI call
183 found_it = true;
184 }
185 }
186 if (found_it && !vfst.at_end()) {
187 // found the caller
188 caller = vfst.method()->method_holder();
189 line_number = vfst.method()->line_number_from_bci(vfst.bci());
190 if (line_number == -1) {
191 // show method name if it's a native method
192 trace = vfst.method()->name_and_sig_as_C_string();
193 }
194 Symbol* s = caller->source_file_name();
195 if (s != NULL) {
196 source_file = s->as_C_string();
197 }
198 }
199 }
200 if (caller != NULL) {
201 if (to_class != caller) {
202 const char * from = caller->external_name();
203 const char * to = to_class->external_name();
204 // print in a single call to reduce interleaving between threads
205 if (source_file != NULL) {
206 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
207 } else {
208 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
209 }
210 }
211 }
212 }
213
214 void trace_class_resolution(Klass* to_class) {
215 EXCEPTION_MARK;
216 trace_class_resolution_impl(to_class, THREAD);
217 if (HAS_PENDING_EXCEPTION) {
218 CLEAR_PENDING_EXCEPTION;
219 }
220 }
221
222 // Wrapper to trace JVM functions
223
224 #ifdef ASSERT
225 Histogram* JVMHistogram;
226 volatile int JVMHistogram_lock = 0;
227
228 class JVMHistogramElement : public HistogramElement {
229 public:
230 JVMHistogramElement(const char* name);
231 };
232
233 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
234 _name = elementName;
235 uintx count = 0;
236
237 while (Atomic::cmpxchg(&JVMHistogram_lock, 0, 1) != 0) {
238 while (Atomic::load_acquire(&JVMHistogram_lock) != 0) {
239 count +=1;
240 if ( (WarnOnStalledSpinLock > 0)
241 && (count % WarnOnStalledSpinLock == 0)) {
242 warning("JVMHistogram_lock seems to be stalled");
243 }
244 }
245 }
246
247 if(JVMHistogram == NULL)
248 JVMHistogram = new Histogram("JVM Call Counts",100);
249
250 JVMHistogram->add_element(this);
251 Atomic::dec(&JVMHistogram_lock);
252 }
253
254 #define JVMCountWrapper(arg) \
255 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
256 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
257
258 #define JVMWrapper(arg) JVMCountWrapper(arg);
259 #else
260 #define JVMWrapper(arg)
261 #endif
262
263
264 // Interface version /////////////////////////////////////////////////////////////////////
265
266
267 JVM_LEAF(jint, JVM_GetInterfaceVersion())
268 return JVM_INTERFACE_VERSION;
269 JVM_END
270
271
272 // java.lang.System //////////////////////////////////////////////////////////////////////
273
274
275 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
276 JVMWrapper("JVM_CurrentTimeMillis");
277 return os::javaTimeMillis();
278 JVM_END
279
280 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
281 JVMWrapper("JVM_NanoTime");
282 return os::javaTimeNanos();
283 JVM_END
284
285 // The function below is actually exposed by jdk.internal.misc.VM and not
286 // java.lang.System, but we choose to keep it here so that it stays next
287 // to JVM_CurrentTimeMillis and JVM_NanoTime
288
289 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
290 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
291
292 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
293 JVMWrapper("JVM_GetNanoTimeAdjustment");
294 jlong seconds;
295 jlong nanos;
296
297 os::javaTimeSystemUTC(seconds, nanos);
298
299 // We're going to verify that the result can fit in a long.
300 // For that we need the difference in seconds between 'seconds'
301 // and 'offset_secs' to be such that:
302 // |seconds - offset_secs| < (2^63/10^9)
303 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
304 // which makes |seconds - offset_secs| < 2^33
305 // and we will prefer +/- 2^32 as the maximum acceptable diff
306 // as 2^32 has a more natural feel than 2^33...
307 //
308 // So if |seconds - offset_secs| >= 2^32 - we return a special
309 // sentinel value (-1) which the caller should take as an
310 // exception value indicating that the offset given to us is
311 // too far from range of the current time - leading to too big
312 // a nano adjustment. The caller is expected to recover by
313 // computing a more accurate offset and calling this method
314 // again. (For the record 2^32 secs is ~136 years, so that
315 // should rarely happen)
316 //
317 jlong diff = seconds - offset_secs;
318 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
319 return -1; // sentinel value: the offset is too far off the target
320 }
321
322 // return the adjustment. If you compute a time by adding
323 // this number of nanoseconds along with the number of seconds
324 // in the offset you should get the current UTC time.
325 return (diff * (jlong)1000000000) + nanos;
326 JVM_END
327
328 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
329 jobject dst, jint dst_pos, jint length))
330 JVMWrapper("JVM_ArrayCopy");
331 // Check if we have null pointers
332 if (src == NULL || dst == NULL) {
333 THROW(vmSymbols::java_lang_NullPointerException());
334 }
335 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
336 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
337 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
338 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
339 // Do copy
340 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
341 JVM_END
342
343
344 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
345 JavaValue r(T_OBJECT);
346 // public synchronized Object put(Object key, Object value);
347 HandleMark hm(THREAD);
348 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
349 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
350 JavaCalls::call_virtual(&r,
351 props,
352 SystemDictionary::Properties_klass(),
353 vmSymbols::put_name(),
354 vmSymbols::object_object_object_signature(),
355 key_str,
356 value_str,
357 THREAD);
358 }
359
360
361 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
362
363 /*
364 * Return all of the system properties in a Java String array with alternating
365 * names and values from the jvm SystemProperty.
366 * Which includes some internal and all commandline -D defined properties.
367 */
368 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
369 JVMWrapper("JVM_GetProperties");
370 ResourceMark rm(THREAD);
371 HandleMark hm(THREAD);
372 int ndx = 0;
373 int fixedCount = 2;
374
375 SystemProperty* p = Arguments::system_properties();
376 int count = Arguments::PropertyList_count(p);
377
378 // Allocate result String array
379 InstanceKlass* ik = SystemDictionary::String_klass();
380 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
381 objArrayHandle result_h(THREAD, r);
382
383 while (p != NULL) {
384 const char * key = p->key();
385 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
386 const char * value = p->value();
387 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
388 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), 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 p = p->next();
394 }
395
396 // Convert the -XX:MaxDirectMemorySize= command line flag
397 // to the sun.nio.MaxDirectMemorySize property.
398 // Do this after setting user properties to prevent people
399 // from setting the value with a -D option, as requested.
400 // Leave empty if not supplied
401 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
402 char as_chars[256];
403 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
404 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
405 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
406 result_h->obj_at_put(ndx * 2, key_str());
407 result_h->obj_at_put(ndx * 2 + 1, value_str());
408 ndx++;
409 }
410
411 // JVM monitoring and management support
412 // Add the sun.management.compiler property for the compiler's name
413 {
414 #undef CSIZE
415 #if defined(_LP64) || defined(_WIN64)
416 #define CSIZE "64-Bit "
417 #else
418 #define CSIZE
419 #endif // 64bit
420
421 #ifdef TIERED
422 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
423 #else
424 #if defined(COMPILER1)
425 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
426 #elif defined(COMPILER2)
427 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
428 #elif INCLUDE_JVMCI
429 #error "INCLUDE_JVMCI should imply TIERED"
430 #else
431 const char* compiler_name = "";
432 #endif // compilers
433 #endif // TIERED
434
435 if (*compiler_name != '\0' &&
436 (Arguments::mode() != Arguments::_int)) {
437 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
438 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
439 result_h->obj_at_put(ndx * 2, key_str());
440 result_h->obj_at_put(ndx * 2 + 1, value_str());
441 ndx++;
442 }
443 }
444
445 return (jobjectArray) JNIHandles::make_local(env, result_h());
446 JVM_END
447
448
449 /*
450 * Return the temporary directory that the VM uses for the attach
451 * and perf data files.
452 *
453 * It is important that this directory is well-known and the
454 * same for all VM instances. It cannot be affected by configuration
455 * variables such as java.io.tmpdir.
456 */
457 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
458 JVMWrapper("JVM_GetTemporaryDirectory");
459 HandleMark hm(THREAD);
460 const char* temp_dir = os::get_temp_directory();
461 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
462 return (jstring) JNIHandles::make_local(env, h());
463 JVM_END
464
465
466 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
467
468 extern volatile jint vm_created;
469
470 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
471 JVMWrapper("JVM_BeforeHalt");
472 EventShutdown event;
473 if (event.should_commit()) {
474 event.set_reason("Shutdown requested from Java");
475 event.commit();
476 }
477 JVM_END
478
479
480 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
481 before_exit(thread);
482 vm_exit(code);
483 JVM_END
484
485
486 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
487 JVMWrapper("JVM_GC");
488 if (!DisableExplicitGC) {
489 Universe::heap()->collect(GCCause::_java_lang_system_gc);
490 }
491 JVM_END
492
493
494 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
495 JVMWrapper("JVM_MaxObjectInspectionAge");
496 return Universe::heap()->millis_since_last_gc();
497 JVM_END
498
499
500 static inline jlong convert_size_t_to_jlong(size_t val) {
501 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
502 NOT_LP64 (return (jlong)val;)
503 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
504 }
505
506 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
507 JVMWrapper("JVM_TotalMemory");
508 size_t n = Universe::heap()->capacity();
509 return convert_size_t_to_jlong(n);
510 JVM_END
511
512
513 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
514 JVMWrapper("JVM_FreeMemory");
515 size_t n = Universe::heap()->unused();
516 return convert_size_t_to_jlong(n);
517 JVM_END
518
519
520 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
521 JVMWrapper("JVM_MaxMemory");
522 size_t n = Universe::heap()->max_capacity();
523 return convert_size_t_to_jlong(n);
524 JVM_END
525
526
527 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
528 JVMWrapper("JVM_ActiveProcessorCount");
529 return os::active_processor_count();
530 JVM_END
531
532
533
534 // java.lang.Throwable //////////////////////////////////////////////////////
535
536 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
537 JVMWrapper("JVM_FillInStackTrace");
538 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
539 java_lang_Throwable::fill_in_stack_trace(exception);
540 JVM_END
541
542 // java.lang.NullPointerException ///////////////////////////////////////////
543
544 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
545 if (!ShowCodeDetailsInExceptionMessages) return NULL;
546
547 oop exc = JNIHandles::resolve_non_null(throwable);
548
549 Method* method;
550 int bci;
551 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
552 return NULL;
553 }
554 if (method->is_native()) {
555 return NULL;
556 }
557
558 stringStream ss;
559 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
560 if (ok) {
561 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_0);
562 return (jstring) JNIHandles::make_local(env, result);
563 } else {
564 return NULL;
565 }
566 JVM_END
567
568 // java.lang.StackTraceElement //////////////////////////////////////////////
569
570
571 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
572 JVMWrapper("JVM_InitStackTraceElementArray");
573 Handle exception(THREAD, JNIHandles::resolve(throwable));
574 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
575 objArrayHandle stack_trace(THREAD, st);
576 // Fill in the allocated stack trace
577 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
578 JVM_END
579
580
581 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
582 JVMWrapper("JVM_InitStackTraceElement");
583 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
584 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
585 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
586 JVM_END
587
588
589 // java.lang.StackWalker //////////////////////////////////////////////////////
590
591
592 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
593 jint skip_frames, jint frame_count, jint start_index,
594 jobjectArray frames))
595 JVMWrapper("JVM_CallStackWalk");
596 JavaThread* jt = (JavaThread*) THREAD;
597 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
598 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
599 }
600
601 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
602
603 // frames array is a Class<?>[] array when only getting caller reference,
604 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
605 // be null.
606 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
607 objArrayHandle frames_array_h(THREAD, fa);
608
609 int limit = start_index + frame_count;
610 if (frames_array_h->length() < limit) {
611 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
612 }
613
614 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
615 start_index, frames_array_h, CHECK_NULL);
616 return JNIHandles::make_local(env, result);
617 JVM_END
618
619
620 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
621 jint frame_count, jint start_index,
622 jobjectArray frames))
623 JVMWrapper("JVM_MoreStackWalk");
624 JavaThread* jt = (JavaThread*) THREAD;
625
626 // frames array is a Class<?>[] 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 int limit = start_index+frame_count;
633 if (frames_array_h->length() < limit) {
634 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
635 }
636
637 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
638 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
639 start_index, frames_array_h, THREAD);
640 JVM_END
641
642 // java.lang.Object ///////////////////////////////////////////////
643
644
645 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
646 JVMWrapper("JVM_IHashCode");
647 // as implemented in the classic virtual machine; return 0 if object is NULL
648 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
649 JVM_END
650
651
652 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
653 JVMWrapper("JVM_MonitorWait");
654 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
655 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
656 if (JvmtiExport::should_post_monitor_wait()) {
657 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
658
659 // The current thread already owns the monitor and it has not yet
660 // been added to the wait queue so the current thread cannot be
661 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
662 // event handler cannot accidentally consume an unpark() meant for
663 // the ParkEvent associated with this ObjectMonitor.
664 }
665 ObjectSynchronizer::wait(obj, ms, CHECK);
666 JVM_END
667
668
669 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
670 JVMWrapper("JVM_MonitorNotify");
671 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
672 ObjectSynchronizer::notify(obj, CHECK);
673 JVM_END
674
675
676 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
677 JVMWrapper("JVM_MonitorNotifyAll");
678 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
679 ObjectSynchronizer::notifyall(obj, CHECK);
680 JVM_END
681
682
683 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
684 JVMWrapper("JVM_Clone");
685 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
686 Klass* klass = obj->klass();
687 JvmtiVMObjectAllocEventCollector oam;
688
689 #ifdef ASSERT
690 // Just checking that the cloneable flag is set correct
691 if (obj->is_array()) {
692 guarantee(klass->is_cloneable(), "all arrays are cloneable");
693 } else {
694 guarantee(obj->is_instance(), "should be instanceOop");
695 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
696 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
697 }
698 #endif
699
700 // Check if class of obj supports the Cloneable interface.
701 // All arrays are considered to be cloneable (See JLS 20.1.5).
702 // All j.l.r.Reference classes are considered non-cloneable.
703 if (!klass->is_cloneable() ||
704 klass->is_value() ||
705 (klass->is_instance_klass() &&
706 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
707 ResourceMark rm(THREAD);
708 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
709 }
710
711 // Make shallow object copy
712 const int size = obj->size();
713 oop new_obj_oop = NULL;
714 if (obj->is_array()) {
715 const int length = ((arrayOop)obj())->length();
716 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
717 /* do_zero */ true, CHECK_NULL);
718 } else {
719 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
720 }
721
722 HeapAccess<>::clone(obj(), new_obj_oop, size);
723
724 Handle new_obj(THREAD, new_obj_oop);
725 // Caution: this involves a java upcall, so the clone should be
726 // "gc-robust" by this stage.
727 if (klass->has_finalizer()) {
728 assert(obj->is_instance(), "should be instanceOop");
729 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
730 new_obj = Handle(THREAD, new_obj_oop);
731 }
732
733 return JNIHandles::make_local(env, new_obj());
734 JVM_END
735
736 // java.io.File ///////////////////////////////////////////////////////////////
737
738 JVM_LEAF(char*, JVM_NativePath(char* path))
739 JVMWrapper("JVM_NativePath");
740 return os::native_path(path);
741 JVM_END
742
743
744 // Misc. class handling ///////////////////////////////////////////////////////////
745
746
747 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
748 JVMWrapper("JVM_GetCallerClass");
749
750 // Getting the class of the caller frame.
751 //
752 // The call stack at this point looks something like this:
753 //
754 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
755 // [1] [ @CallerSensitive API.method ]
756 // [.] [ (skipped intermediate frames) ]
757 // [n] [ caller ]
758 vframeStream vfst(thread);
759 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
760 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
761 Method* m = vfst.method();
762 assert(m != NULL, "sanity");
763 switch (n) {
764 case 0:
765 // This must only be called from Reflection.getCallerClass
766 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
767 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
768 }
769 // fall-through
770 case 1:
771 // Frame 0 and 1 must be caller sensitive.
772 if (!m->caller_sensitive()) {
773 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
774 }
775 break;
776 default:
777 if (!m->is_ignored_by_security_stack_walk()) {
778 // We have reached the desired frame; return the holder class.
779 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
780 }
781 break;
782 }
783 }
784 return NULL;
785 JVM_END
786
787
788 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
789 JVMWrapper("JVM_FindPrimitiveClass");
790 oop mirror = NULL;
791 BasicType t = name2type(utf);
792 if (t != T_ILLEGAL && !is_reference_type(t)) {
793 mirror = Universe::java_mirror(t);
794 }
795 if (mirror == NULL) {
796 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
797 } else {
798 return (jclass) JNIHandles::make_local(env, mirror);
799 }
800 JVM_END
801
802
803 // Returns a class loaded by the bootstrap class loader; or null
804 // if not found. ClassNotFoundException is not thrown.
805 // FindClassFromBootLoader is exported to the launcher for windows.
806 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
807 const char* name))
808 JVMWrapper("JVM_FindClassFromBootLoader");
809
810 // Java libraries should ensure that name is never null...
811 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
812 // It's impossible to create this class; the name cannot fit
813 // into the constant pool.
814 return NULL;
815 }
816
817 TempNewSymbol h_name = SymbolTable::new_symbol(name);
818 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
819 if (k == NULL) {
820 return NULL;
821 }
822
823 if (log_is_enabled(Debug, class, resolve)) {
824 trace_class_resolution(k);
825 }
826 return (jclass) JNIHandles::make_local(env, k->java_mirror());
827 JVM_END
828
829 // Find a class with this name in this loader, using the caller's protection domain.
830 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
831 jboolean init, jobject loader,
832 jclass caller))
833 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
834 // Java libraries should ensure that name is never null...
835 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
836 // It's impossible to create this class; the name cannot fit
837 // into the constant pool.
838 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
839 }
840
841 TempNewSymbol h_name = SymbolTable::new_symbol(name);
842
843 oop loader_oop = JNIHandles::resolve(loader);
844 oop from_class = JNIHandles::resolve(caller);
845 oop protection_domain = NULL;
846 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
847 // NPE. Put it in another way, the bootstrap class loader has all permission and
848 // thus no checkPackageAccess equivalence in the VM class loader.
849 // The caller is also passed as NULL by the java code if there is no security
850 // manager to avoid the performance cost of getting the calling class.
851 if (from_class != NULL && loader_oop != NULL) {
852 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
853 }
854
855 Handle h_loader(THREAD, loader_oop);
856 Handle h_prot(THREAD, protection_domain);
857 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
858 h_prot, false, THREAD);
859
860 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
861 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
862 }
863 return result;
864 JVM_END
865
866 // Currently only called from the old verifier.
867 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
868 jboolean init, jclass from))
869 JVMWrapper("JVM_FindClassFromClass");
870 if (name == NULL) {
871 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
872 }
873 if ((int)strlen(name) > Symbol::max_length()) {
874 // It's impossible to create this class; the name cannot fit
875 // into the constant pool.
876 Exceptions::fthrow(THREAD_AND_LOCATION,
877 vmSymbols::java_lang_NoClassDefFoundError(),
878 "Class name exceeds maximum length of %d: %s",
879 Symbol::max_length(),
880 name);
881 return 0;
882 }
883 TempNewSymbol h_name = SymbolTable::new_symbol(name);
884 oop from_class_oop = JNIHandles::resolve(from);
885 Klass* from_class = (from_class_oop == NULL)
886 ? (Klass*)NULL
887 : java_lang_Class::as_Klass(from_class_oop);
888 oop class_loader = NULL;
889 oop protection_domain = NULL;
890 if (from_class != NULL) {
891 class_loader = from_class->class_loader();
892 protection_domain = from_class->protection_domain();
893 }
894 Handle h_loader(THREAD, class_loader);
895 Handle h_prot (THREAD, protection_domain);
896 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
897 h_prot, true, thread);
898
899 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
900 // this function is generally only used for class loading during verification.
901 ResourceMark rm;
902 oop from_mirror = JNIHandles::resolve_non_null(from);
903 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
904 const char * from_name = from_class->external_name();
905
906 oop mirror = JNIHandles::resolve_non_null(result);
907 Klass* to_class = java_lang_Class::as_Klass(mirror);
908 const char * to = to_class->external_name();
909 log_debug(class, resolve)("%s %s (verification)", from_name, to);
910 }
911
912 return result;
913 JVM_END
914
915 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
916 if (loader.is_null()) {
917 return;
918 }
919
920 // check whether the current caller thread holds the lock or not.
921 // If not, increment the corresponding counter
922 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
923 ObjectSynchronizer::owner_self) {
924 counter->inc();
925 }
926 }
927
928 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
929 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
930 jobject loader, const jbyte *buf,
931 jsize len, jobject pd, const char *source,
932 TRAPS) {
933 if (source == NULL) source = "__JVM_DefineClass__";
934
935 assert(THREAD->is_Java_thread(), "must be a JavaThread");
936 JavaThread* jt = (JavaThread*) THREAD;
937
938 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
939 ClassLoader::perf_define_appclass_selftime(),
940 ClassLoader::perf_define_appclasses(),
941 jt->get_thread_stat()->perf_recursion_counts_addr(),
942 jt->get_thread_stat()->perf_timers_addr(),
943 PerfClassTraceTime::DEFINE_CLASS);
944
945 if (UsePerfData) {
946 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
947 }
948
949 // Since exceptions can be thrown, class initialization can take place
950 // if name is NULL no check for class name in .class stream has to be made.
951 TempNewSymbol class_name = NULL;
952 if (name != NULL) {
953 const int str_len = (int)strlen(name);
954 if (str_len > Symbol::max_length()) {
955 // It's impossible to create this class; the name cannot fit
956 // into the constant pool.
957 Exceptions::fthrow(THREAD_AND_LOCATION,
958 vmSymbols::java_lang_NoClassDefFoundError(),
959 "Class name exceeds maximum length of %d: %s",
960 Symbol::max_length(),
961 name);
962 return 0;
963 }
964 class_name = SymbolTable::new_symbol(name, str_len);
965 }
966
967 ResourceMark rm(THREAD);
968 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
969 Handle class_loader (THREAD, JNIHandles::resolve(loader));
970 if (UsePerfData) {
971 is_lock_held_by_thread(class_loader,
972 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
973 THREAD);
974 }
975 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
976 Klass* k = SystemDictionary::resolve_from_stream(class_name,
977 class_loader,
978 protection_domain,
979 &st,
980 CHECK_NULL);
981
982 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
983 trace_class_resolution(k);
984 }
985
986 return (jclass) JNIHandles::make_local(env, k->java_mirror());
987 }
988
989
990 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
991 JVMWrapper("JVM_DefineClass");
992
993 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
994 JVM_END
995
996
997 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
998 JVMWrapper("JVM_DefineClassWithSource");
999
1000 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
1001 JVM_END
1002
1003 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1004 JVMWrapper("JVM_FindLoadedClass");
1005 ResourceMark rm(THREAD);
1006
1007 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1008 char* str = java_lang_String::as_utf8_string(h_name());
1009
1010 // Sanity check, don't expect null
1011 if (str == NULL) return NULL;
1012
1013 // Internalize the string, converting '.' to '/' in string.
1014 char* p = (char*)str;
1015 while (*p != '\0') {
1016 if (*p == '.') {
1017 *p = '/';
1018 }
1019 p++;
1020 }
1021
1022 const int str_len = (int)(p - str);
1023 if (str_len > Symbol::max_length()) {
1024 // It's impossible to create this class; the name cannot fit
1025 // into the constant pool.
1026 return NULL;
1027 }
1028 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1029
1030 // Security Note:
1031 // The Java level wrapper will perform the necessary security check allowing
1032 // us to pass the NULL as the initiating class loader.
1033 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1034 if (UsePerfData) {
1035 is_lock_held_by_thread(h_loader,
1036 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1037 THREAD);
1038 }
1039
1040 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1041 h_loader,
1042 Handle(),
1043 CHECK_NULL);
1044 #if INCLUDE_CDS
1045 if (k == NULL) {
1046 // If the class is not already loaded, try to see if it's in the shared
1047 // archive for the current classloader (h_loader).
1048 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1049 }
1050 #endif
1051 return (k == NULL) ? NULL :
1052 (jclass) JNIHandles::make_local(env, k->java_mirror());
1053 JVM_END
1054
1055 // Module support //////////////////////////////////////////////////////////////////////////////
1056
1057 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1058 jstring location, const char* const* packages, jsize num_packages))
1059 JVMWrapper("JVM_DefineModule");
1060 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1061 JVM_END
1062
1063 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1064 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1065 Modules::set_bootloader_unnamed_module(module, CHECK);
1066 JVM_END
1067
1068 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1069 JVMWrapper("JVM_AddModuleExports");
1070 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1071 JVM_END
1072
1073 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1074 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1075 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1076 JVM_END
1077
1078 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1079 JVMWrapper("JVM_AddModuleExportsToAll");
1080 Modules::add_module_exports(from_module, package, NULL, CHECK);
1081 JVM_END
1082
1083 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1084 JVMWrapper("JVM_AddReadsModule");
1085 Modules::add_reads_module(from_module, source_module, CHECK);
1086 JVM_END
1087
1088 // Reflection support //////////////////////////////////////////////////////////////////////////////
1089
1090 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1091 assert (cls != NULL, "illegal class");
1092 JVMWrapper("JVM_InitClassName");
1093 JvmtiVMObjectAllocEventCollector oam;
1094 ResourceMark rm(THREAD);
1095 HandleMark hm(THREAD);
1096 Handle java_class(THREAD, JNIHandles::resolve(cls));
1097 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1098 return (jstring) JNIHandles::make_local(env, result);
1099 JVM_END
1100
1101
1102 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1103 JVMWrapper("JVM_GetClassInterfaces");
1104 JvmtiVMObjectAllocEventCollector oam;
1105 oop mirror = JNIHandles::resolve_non_null(cls);
1106
1107 // Special handling for primitive objects
1108 if (java_lang_Class::is_primitive(mirror)) {
1109 // Primitive objects does not have any interfaces
1110 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1111 return (jobjectArray) JNIHandles::make_local(env, r);
1112 }
1113
1114 Klass* klass = java_lang_Class::as_Klass(mirror);
1115 // Figure size of result array
1116 int size;
1117 if (klass->is_instance_klass()) {
1118 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1119 } else {
1120 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1121 size = 2;
1122 }
1123
1124 // Allocate result array
1125 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1126 objArrayHandle result (THREAD, r);
1127 // Fill in result
1128 if (klass->is_instance_klass()) {
1129 // Regular instance klass, fill in all local interfaces
1130 for (int index = 0; index < size; index++) {
1131 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1132 result->obj_at_put(index, k->java_mirror());
1133 }
1134 } else {
1135 // All arrays implement java.lang.Cloneable and java.io.Serializable
1136 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1137 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1138 }
1139 return (jobjectArray) JNIHandles::make_local(env, result());
1140 JVM_END
1141
1142
1143 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1144 JVMWrapper("JVM_IsInterface");
1145 oop mirror = JNIHandles::resolve_non_null(cls);
1146 if (java_lang_Class::is_primitive(mirror)) {
1147 return JNI_FALSE;
1148 }
1149 Klass* k = java_lang_Class::as_Klass(mirror);
1150 jboolean result = k->is_interface();
1151 assert(!result || k->is_instance_klass(),
1152 "all interfaces are instance types");
1153 // The compiler intrinsic for isInterface tests the
1154 // Klass::_access_flags bits in the same way.
1155 return result;
1156 JVM_END
1157
1158
1159 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1160 JVMWrapper("JVM_GetClassSigners");
1161 JvmtiVMObjectAllocEventCollector oam;
1162 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1163 // There are no signers for primitive types
1164 return NULL;
1165 }
1166
1167 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1168
1169 // If there are no signers set in the class, or if the class
1170 // is an array, return NULL.
1171 if (signers == NULL) return NULL;
1172
1173 // copy of the signers array
1174 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1175 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1176 for (int index = 0; index < signers->length(); index++) {
1177 signers_copy->obj_at_put(index, signers->obj_at(index));
1178 }
1179
1180 // return the copy
1181 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1182 JVM_END
1183
1184
1185 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1186 JVMWrapper("JVM_SetClassSigners");
1187 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1188 // This call is ignored for primitive types and arrays.
1189 // Signers are only set once, ClassLoader.java, and thus shouldn't
1190 // be called with an array. Only the bootstrap loader creates arrays.
1191 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1192 if (k->is_instance_klass()) {
1193 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1194 }
1195 }
1196 JVM_END
1197
1198
1199 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1200 JVMWrapper("JVM_GetProtectionDomain");
1201 if (JNIHandles::resolve(cls) == NULL) {
1202 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1203 }
1204
1205 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1206 // Primitive types does not have a protection domain.
1207 return NULL;
1208 }
1209
1210 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1211 return (jobject) JNIHandles::make_local(env, pd);
1212 JVM_END
1213
1214
1215 // Returns the inherited_access_control_context field of the running thread.
1216 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1217 JVMWrapper("JVM_GetInheritedAccessControlContext");
1218 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1219 return JNIHandles::make_local(env, result);
1220 JVM_END
1221
1222 class RegisterArrayForGC {
1223 private:
1224 JavaThread *_thread;
1225 public:
1226 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1227 _thread = thread;
1228 _thread->register_array_for_gc(array);
1229 }
1230
1231 ~RegisterArrayForGC() {
1232 _thread->register_array_for_gc(NULL);
1233 }
1234 };
1235
1236
1237 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1238 JVMWrapper("JVM_GetStackAccessControlContext");
1239 if (!UsePrivilegedStack) return NULL;
1240
1241 ResourceMark rm(THREAD);
1242 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1243 JvmtiVMObjectAllocEventCollector oam;
1244
1245 // count the protection domains on the execution stack. We collapse
1246 // duplicate consecutive protection domains into a single one, as
1247 // well as stopping when we hit a privileged frame.
1248
1249 oop previous_protection_domain = NULL;
1250 Handle privileged_context(thread, NULL);
1251 bool is_privileged = false;
1252 oop protection_domain = NULL;
1253
1254 // Iterate through Java frames
1255 vframeStream vfst(thread);
1256 for(; !vfst.at_end(); vfst.next()) {
1257 // get method of frame
1258 Method* method = vfst.method();
1259
1260 // stop at the first privileged frame
1261 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1262 method->name() == vmSymbols::executePrivileged_name())
1263 {
1264 // this frame is privileged
1265 is_privileged = true;
1266
1267 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1268
1269 StackValueCollection* locals = priv->locals();
1270 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1271 StackValue* clr_sv = locals->at(2); // Class<?> caller
1272 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1273 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1274 privileged_context = ctx_sv->get_obj();
1275 Handle caller = clr_sv->get_obj();
1276
1277 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1278 protection_domain = caller_klass->protection_domain();
1279 } else {
1280 protection_domain = method->method_holder()->protection_domain();
1281 }
1282
1283 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1284 local_array->push(protection_domain);
1285 previous_protection_domain = protection_domain;
1286 }
1287
1288 if (is_privileged) break;
1289 }
1290
1291
1292 // either all the domains on the stack were system domains, or
1293 // we had a privileged system domain
1294 if (local_array->is_empty()) {
1295 if (is_privileged && privileged_context.is_null()) return NULL;
1296
1297 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1298 return JNIHandles::make_local(env, result);
1299 }
1300
1301 // the resource area must be registered in case of a gc
1302 RegisterArrayForGC ragc(thread, local_array);
1303 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1304 local_array->length(), CHECK_NULL);
1305 objArrayHandle h_context(thread, context);
1306 for (int index = 0; index < local_array->length(); index++) {
1307 h_context->obj_at_put(index, local_array->at(index));
1308 }
1309
1310 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1311
1312 return JNIHandles::make_local(env, result);
1313 JVM_END
1314
1315
1316 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1317 JVMWrapper("JVM_IsArrayClass");
1318 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1319 return (k != NULL) && k->is_array_klass() ? true : false;
1320 JVM_END
1321
1322
1323 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1324 JVMWrapper("JVM_IsPrimitiveClass");
1325 oop mirror = JNIHandles::resolve_non_null(cls);
1326 return (jboolean) java_lang_Class::is_primitive(mirror);
1327 JVM_END
1328
1329
1330 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1331 JVMWrapper("JVM_GetClassModifiers");
1332 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1333 // Primitive type
1334 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1335 }
1336
1337 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1338 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1339 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1340 return k->modifier_flags();
1341 JVM_END
1342
1343
1344 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1345
1346 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1347 JvmtiVMObjectAllocEventCollector oam;
1348 // ofClass is a reference to a java_lang_Class object. The mirror object
1349 // of an InstanceKlass
1350
1351 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1352 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1353 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1354 return (jobjectArray)JNIHandles::make_local(env, result);
1355 }
1356
1357 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1358 InnerClassesIterator iter(k);
1359
1360 if (iter.length() == 0) {
1361 // Neither an inner nor outer class
1362 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1363 return (jobjectArray)JNIHandles::make_local(env, result);
1364 }
1365
1366 // find inner class info
1367 constantPoolHandle cp(thread, k->constants());
1368 int length = iter.length();
1369
1370 // Allocate temp. result array
1371 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1372 objArrayHandle result (THREAD, r);
1373 int members = 0;
1374
1375 for (; !iter.done(); iter.next()) {
1376 int ioff = iter.inner_class_info_index();
1377 int ooff = iter.outer_class_info_index();
1378
1379 if (ioff != 0 && ooff != 0) {
1380 // Check to see if the name matches the class we're looking for
1381 // before attempting to find the class.
1382 if (cp->klass_name_at_matches(k, ooff)) {
1383 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1384 if (outer_klass == k) {
1385 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1386 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1387
1388 // Throws an exception if outer klass has not declared k as
1389 // an inner klass
1390 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1391
1392 result->obj_at_put(members, inner_klass->java_mirror());
1393 members++;
1394 }
1395 }
1396 }
1397 }
1398
1399 if (members != length) {
1400 // Return array of right length
1401 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1402 for(int i = 0; i < members; i++) {
1403 res->obj_at_put(i, result->obj_at(i));
1404 }
1405 return (jobjectArray)JNIHandles::make_local(env, res);
1406 }
1407
1408 return (jobjectArray)JNIHandles::make_local(env, result());
1409 JVM_END
1410
1411
1412 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1413 {
1414 // ofClass is a reference to a java_lang_Class object.
1415 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1416 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1417 return NULL;
1418 }
1419
1420 bool inner_is_member = false;
1421 Klass* outer_klass
1422 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1423 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1424 if (outer_klass == NULL) return NULL; // already a top-level class
1425 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1426 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1427 }
1428 JVM_END
1429
1430 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1431 {
1432 oop mirror = JNIHandles::resolve_non_null(cls);
1433 if (java_lang_Class::is_primitive(mirror) ||
1434 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1435 return NULL;
1436 }
1437 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1438 int ooff = 0, noff = 0;
1439 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1440 if (noff != 0) {
1441 constantPoolHandle i_cp(thread, k->constants());
1442 Symbol* name = i_cp->symbol_at(noff);
1443 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1444 return (jstring) JNIHandles::make_local(env, str());
1445 }
1446 }
1447 return NULL;
1448 }
1449 JVM_END
1450
1451 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1452 assert (cls != NULL, "illegal class");
1453 JVMWrapper("JVM_GetClassSignature");
1454 JvmtiVMObjectAllocEventCollector oam;
1455 ResourceMark rm(THREAD);
1456 // Return null for arrays and primatives
1457 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1458 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1459 if (k->is_instance_klass()) {
1460 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1461 if (sym == NULL) return NULL;
1462 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1463 return (jstring) JNIHandles::make_local(env, str());
1464 }
1465 }
1466 return NULL;
1467 JVM_END
1468
1469
1470 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1471 assert (cls != NULL, "illegal class");
1472 JVMWrapper("JVM_GetClassAnnotations");
1473
1474 // Return null for arrays and primitives
1475 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1476 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1477 if (k->is_instance_klass()) {
1478 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1479 return (jbyteArray) JNIHandles::make_local(env, a);
1480 }
1481 }
1482 return NULL;
1483 JVM_END
1484
1485
1486 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1487 // some of this code was adapted from from jni_FromReflectedField
1488
1489 oop reflected = JNIHandles::resolve_non_null(field);
1490 oop mirror = java_lang_reflect_Field::clazz(reflected);
1491 Klass* k = java_lang_Class::as_Klass(mirror);
1492 int slot = java_lang_reflect_Field::slot(reflected);
1493 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1494
1495 InstanceKlass* ik = InstanceKlass::cast(k);
1496 intptr_t offset = ik->field_offset(slot);
1497
1498 if (modifiers & JVM_ACC_STATIC) {
1499 // for static fields we only look in the current class
1500 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1501 assert(false, "cannot find static field");
1502 return false;
1503 }
1504 } else {
1505 // for instance fields we start with the current class and work
1506 // our way up through the superclass chain
1507 if (!ik->find_field_from_offset(offset, false, &fd)) {
1508 assert(false, "cannot find instance field");
1509 return false;
1510 }
1511 }
1512 return true;
1513 }
1514
1515 static Method* jvm_get_method_common(jobject method) {
1516 // some of this code was adapted from from jni_FromReflectedMethod
1517
1518 oop reflected = JNIHandles::resolve_non_null(method);
1519 oop mirror = NULL;
1520 int slot = 0;
1521
1522 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1523 mirror = java_lang_reflect_Constructor::clazz(reflected);
1524 slot = java_lang_reflect_Constructor::slot(reflected);
1525 } else {
1526 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1527 "wrong type");
1528 mirror = java_lang_reflect_Method::clazz(reflected);
1529 slot = java_lang_reflect_Method::slot(reflected);
1530 }
1531 Klass* k = java_lang_Class::as_Klass(mirror);
1532
1533 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1534 assert(m != NULL, "cannot find method");
1535 return m; // caller has to deal with NULL in product mode
1536 }
1537
1538 /* Type use annotations support (JDK 1.8) */
1539
1540 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1541 assert (cls != NULL, "illegal class");
1542 JVMWrapper("JVM_GetClassTypeAnnotations");
1543 ResourceMark rm(THREAD);
1544 // Return null for arrays and primitives
1545 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1547 if (k->is_instance_klass()) {
1548 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1549 if (type_annotations != NULL) {
1550 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1551 return (jbyteArray) JNIHandles::make_local(env, a);
1552 }
1553 }
1554 }
1555 return NULL;
1556 JVM_END
1557
1558 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1559 assert (method != NULL, "illegal method");
1560 JVMWrapper("JVM_GetMethodTypeAnnotations");
1561
1562 // method is a handle to a java.lang.reflect.Method object
1563 Method* m = jvm_get_method_common(method);
1564 if (m == NULL) {
1565 return NULL;
1566 }
1567
1568 AnnotationArray* type_annotations = m->type_annotations();
1569 if (type_annotations != NULL) {
1570 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1571 return (jbyteArray) JNIHandles::make_local(env, a);
1572 }
1573
1574 return NULL;
1575 JVM_END
1576
1577 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1578 assert (field != NULL, "illegal field");
1579 JVMWrapper("JVM_GetFieldTypeAnnotations");
1580
1581 fieldDescriptor fd;
1582 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1583 if (!gotFd) {
1584 return NULL;
1585 }
1586
1587 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1588 JVM_END
1589
1590 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1591 if (!cp->is_within_bounds(index)) {
1592 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1593 }
1594 }
1595
1596 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1597 {
1598 JVMWrapper("JVM_GetMethodParameters");
1599 // method is a handle to a java.lang.reflect.Method object
1600 Method* method_ptr = jvm_get_method_common(method);
1601 methodHandle mh (THREAD, method_ptr);
1602 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1603 const int num_params = mh->method_parameters_length();
1604
1605 if (num_params < 0) {
1606 // A -1 return value from method_parameters_length means there is no
1607 // parameter data. Return null to indicate this to the reflection
1608 // API.
1609 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1610 return (jobjectArray)NULL;
1611 } else {
1612 // Otherwise, we return something up to reflection, even if it is
1613 // a zero-length array. Why? Because in some cases this can
1614 // trigger a MalformedParametersException.
1615
1616 // make sure all the symbols are properly formatted
1617 for (int i = 0; i < num_params; i++) {
1618 MethodParametersElement* params = mh->method_parameters_start();
1619 int index = params[i].name_cp_index;
1620 constantPoolHandle cp(THREAD, mh->constants());
1621 bounds_check(cp, index, CHECK_NULL);
1622
1623 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1624 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1625 "Wrong type at constant pool index");
1626 }
1627
1628 }
1629
1630 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1631 objArrayHandle result (THREAD, result_oop);
1632
1633 for (int i = 0; i < num_params; i++) {
1634 MethodParametersElement* params = mh->method_parameters_start();
1635 // For a 0 index, give a NULL symbol
1636 Symbol* sym = 0 != params[i].name_cp_index ?
1637 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1638 int flags = params[i].flags;
1639 oop param = Reflection::new_parameter(reflected_method, i, sym,
1640 flags, CHECK_NULL);
1641 result->obj_at_put(i, param);
1642 }
1643 return (jobjectArray)JNIHandles::make_local(env, result());
1644 }
1645 }
1646 JVM_END
1647
1648 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1649
1650 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1651 {
1652 JVMWrapper("JVM_GetClassDeclaredFields");
1653 JvmtiVMObjectAllocEventCollector oam;
1654
1655 // Exclude primitive types and array types
1656 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1657 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1658 // Return empty array
1659 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1660 return (jobjectArray) JNIHandles::make_local(env, res);
1661 }
1662
1663 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1664 constantPoolHandle cp(THREAD, k->constants());
1665
1666 // Ensure class is linked
1667 k->link_class(CHECK_NULL);
1668
1669 // Allocate result
1670 int num_fields;
1671
1672 if (publicOnly) {
1673 num_fields = 0;
1674 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1675 if (fs.access_flags().is_public()) ++num_fields;
1676 }
1677 } else {
1678 num_fields = k->java_fields_count();
1679 }
1680
1681 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1682 objArrayHandle result (THREAD, r);
1683
1684 int out_idx = 0;
1685 fieldDescriptor fd;
1686 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1687 if (!publicOnly || fs.access_flags().is_public()) {
1688 fd.reinitialize(k, fs.index());
1689 oop field = Reflection::new_field(&fd, CHECK_NULL);
1690 result->obj_at_put(out_idx, field);
1691 ++out_idx;
1692 }
1693 }
1694 assert(out_idx == num_fields, "just checking");
1695 return (jobjectArray) JNIHandles::make_local(env, result());
1696 }
1697 JVM_END
1698
1699 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1700 {
1701 JVMWrapper("JVM_IsRecord");
1702 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1703 if (k != NULL && k->is_instance_klass()) {
1704 InstanceKlass* ik = InstanceKlass::cast(k);
1705 return ik->is_record();
1706 } else {
1707 return false;
1708 }
1709 }
1710 JVM_END
1711
1712 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1713 {
1714 JVMWrapper("JVM_GetRecordComponents");
1715 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1716 assert(c->is_instance_klass(), "must be");
1717 InstanceKlass* ik = InstanceKlass::cast(c);
1718
1719 if (ik->is_record()) {
1720 Array<RecordComponent*>* components = ik->record_components();
1721 assert(components != NULL, "components should not be NULL");
1722 {
1723 JvmtiVMObjectAllocEventCollector oam;
1724 constantPoolHandle cp(THREAD, ik->constants());
1725 int length = components->length();
1726 assert(length >= 0, "unexpected record_components length");
1727 objArrayOop record_components =
1728 oopFactory::new_objArray(SystemDictionary::RecordComponent_klass(), length, CHECK_NULL);
1729 objArrayHandle components_h (THREAD, record_components);
1730
1731 for (int x = 0; x < length; x++) {
1732 RecordComponent* component = components->at(x);
1733 assert(component != NULL, "unexpected NULL record component");
1734 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1735 components_h->obj_at_put(x, component_oop);
1736 }
1737 return (jobjectArray)JNIHandles::make_local(components_h());
1738 }
1739 }
1740
1741 // Return empty array if ofClass is not a record.
1742 objArrayOop result = oopFactory::new_objArray(SystemDictionary::RecordComponent_klass(), 0, CHECK_NULL);
1743 return (jobjectArray)JNIHandles::make_local(env, result);
1744 }
1745 JVM_END
1746
1747 static bool select_method(const methodHandle& method, bool want_constructor) {
1748 bool is_ctor = (method->is_object_constructor() ||
1749 method->is_static_init_factory());
1750 if (want_constructor) {
1751 return is_ctor;
1752 } else {
1753 return (!is_ctor &&
1754 !method->is_class_initializer() &&
1755 !method->is_overpass());
1756 }
1757 }
1758
1759 static jobjectArray get_class_declared_methods_helper(
1760 JNIEnv *env,
1761 jclass ofClass, jboolean publicOnly,
1762 bool want_constructor,
1763 Klass* klass, TRAPS) {
1764
1765 JvmtiVMObjectAllocEventCollector oam;
1766
1767 // Exclude primitive types and array types
1768 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1769 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1770 // Return empty array
1771 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1772 return (jobjectArray) JNIHandles::make_local(env, res);
1773 }
1774
1775 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1776
1777 // Ensure class is linked
1778 k->link_class(CHECK_NULL);
1779
1780 Array<Method*>* methods = k->methods();
1781 int methods_length = methods->length();
1782
1783 // Save original method_idnum in case of redefinition, which can change
1784 // the idnum of obsolete methods. The new method will have the same idnum
1785 // but if we refresh the methods array, the counts will be wrong.
1786 ResourceMark rm(THREAD);
1787 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1788 int num_methods = 0;
1789
1790 for (int i = 0; i < methods_length; i++) {
1791 methodHandle method(THREAD, methods->at(i));
1792 if (select_method(method, want_constructor)) {
1793 if (!publicOnly || method->is_public()) {
1794 idnums->push(method->method_idnum());
1795 ++num_methods;
1796 }
1797 }
1798 }
1799
1800 // Allocate result
1801 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1802 objArrayHandle result (THREAD, r);
1803
1804 // Now just put the methods that we selected above, but go by their idnum
1805 // in case of redefinition. The methods can be redefined at any safepoint,
1806 // so above when allocating the oop array and below when creating reflect
1807 // objects.
1808 for (int i = 0; i < num_methods; i++) {
1809 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1810 if (method.is_null()) {
1811 // Method may have been deleted and seems this API can handle null
1812 // Otherwise should probably put a method that throws NSME
1813 result->obj_at_put(i, NULL);
1814 } else {
1815 oop m;
1816 if (want_constructor) {
1817 assert(method->is_object_constructor() ||
1818 method->is_static_init_factory(), "must be");
1819 m = Reflection::new_constructor(method, CHECK_NULL);
1820 } else {
1821 m = Reflection::new_method(method, false, CHECK_NULL);
1822 }
1823 result->obj_at_put(i, m);
1824 }
1825 }
1826
1827 return (jobjectArray) JNIHandles::make_local(env, result());
1828 }
1829
1830 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1831 {
1832 JVMWrapper("JVM_GetClassDeclaredMethods");
1833 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1834 /*want_constructor*/ false,
1835 SystemDictionary::reflect_Method_klass(), THREAD);
1836 }
1837 JVM_END
1838
1839 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1840 {
1841 JVMWrapper("JVM_GetClassDeclaredConstructors");
1842 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1843 /*want_constructor*/ true,
1844 SystemDictionary::reflect_Constructor_klass(), THREAD);
1845 }
1846 JVM_END
1847
1848 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1849 {
1850 JVMWrapper("JVM_GetClassAccessFlags");
1851 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1852 // Primitive type
1853 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1854 }
1855
1856 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1857 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1858 }
1859 JVM_END
1860
1861 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1862 {
1863 JVMWrapper("JVM_AreNestMates");
1864 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1865 assert(c->is_instance_klass(), "must be");
1866 InstanceKlass* ck = InstanceKlass::cast(c);
1867 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1868 assert(m->is_instance_klass(), "must be");
1869 InstanceKlass* mk = InstanceKlass::cast(m);
1870 return ck->has_nestmate_access_to(mk, THREAD);
1871 }
1872 JVM_END
1873
1874 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1875 {
1876 // current is not a primitive or array class
1877 JVMWrapper("JVM_GetNestHost");
1878 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1879 assert(c->is_instance_klass(), "must be");
1880 InstanceKlass* ck = InstanceKlass::cast(c);
1881 // Don't post exceptions if validation fails
1882 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1883 return (jclass) (host == NULL ? NULL :
1884 JNIHandles::make_local(THREAD, host->java_mirror()));
1885 }
1886 JVM_END
1887
1888 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1889 {
1890 // current is not a primitive or array class
1891 JVMWrapper("JVM_GetNestMembers");
1892 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1893 assert(c->is_instance_klass(), "must be");
1894 InstanceKlass* ck = InstanceKlass::cast(c);
1895 // Get the nest host for this nest - throw ICCE if validation fails
1896 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1897 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1898
1899 {
1900 JvmtiVMObjectAllocEventCollector oam;
1901 Array<u2>* members = host->nest_members();
1902 int length = members == NULL ? 0 : members->length();
1903 // nest host is first in the array so make it one bigger
1904 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1905 length + 1, CHECK_NULL);
1906 objArrayHandle result (THREAD, r);
1907 result->obj_at_put(0, host->java_mirror());
1908 if (length != 0) {
1909 int i;
1910 for (i = 0; i < length; i++) {
1911 int cp_index = members->at(i);
1912 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1913 if (k->is_instance_klass()) {
1914 InstanceKlass* nest_host_k =
1915 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1916 if (nest_host_k == host) {
1917 result->obj_at_put(i+1, k->java_mirror());
1918 }
1919 else {
1920 // k's nest host is legal but it isn't our host so
1921 // throw ICCE
1922 ResourceMark rm(THREAD);
1923 Exceptions::fthrow(THREAD_AND_LOCATION,
1924 icce,
1925 "Nest member %s in %s declares a different nest host of %s",
1926 k->external_name(),
1927 host->external_name(),
1928 nest_host_k->external_name()
1929 );
1930 return NULL;
1931 }
1932 }
1933 else {
1934 // we have a bad nest member entry - throw ICCE
1935 ResourceMark rm(THREAD);
1936 Exceptions::fthrow(THREAD_AND_LOCATION,
1937 icce,
1938 "Class %s can not be a nest member of %s",
1939 k->external_name(),
1940 host->external_name()
1941 );
1942 return NULL;
1943 }
1944 }
1945 }
1946 else {
1947 assert(host == ck, "must be singleton nest");
1948 }
1949 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1950 }
1951 }
1952 JVM_END
1953
1954 // Constant pool access //////////////////////////////////////////////////////////
1955
1956 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1957 {
1958 JVMWrapper("JVM_GetClassConstantPool");
1959 JvmtiVMObjectAllocEventCollector oam;
1960
1961 // Return null for primitives and arrays
1962 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1963 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1964 if (k->is_instance_klass()) {
1965 InstanceKlass* k_h = InstanceKlass::cast(k);
1966 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1967 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1968 return JNIHandles::make_local(jcp());
1969 }
1970 }
1971 return NULL;
1972 }
1973 JVM_END
1974
1975
1976 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1977 {
1978 JVMWrapper("JVM_ConstantPoolGetSize");
1979 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1980 return cp->length();
1981 }
1982 JVM_END
1983
1984
1985 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1986 {
1987 JVMWrapper("JVM_ConstantPoolGetClassAt");
1988 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1989 bounds_check(cp, index, CHECK_NULL);
1990 constantTag tag = cp->tag_at(index);
1991 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1992 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1993 }
1994 Klass* k = cp->klass_at(index, CHECK_NULL);
1995 return (jclass) JNIHandles::make_local(k->java_mirror());
1996 }
1997 JVM_END
1998
1999 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2000 {
2001 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2002 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2003 bounds_check(cp, index, CHECK_NULL);
2004 constantTag tag = cp->tag_at(index);
2005 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2006 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2007 }
2008 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2009 if (k == NULL) return NULL;
2010 return (jclass) JNIHandles::make_local(k->java_mirror());
2011 }
2012 JVM_END
2013
2014 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2015 constantTag tag = cp->tag_at(index);
2016 if (!tag.is_method() && !tag.is_interface_method()) {
2017 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2018 }
2019 int klass_ref = cp->uncached_klass_ref_index_at(index);
2020 Klass* k_o;
2021 if (force_resolution) {
2022 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2023 } else {
2024 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2025 if (k_o == NULL) return NULL;
2026 }
2027 InstanceKlass* k = InstanceKlass::cast(k_o);
2028 Symbol* name = cp->uncached_name_ref_at(index);
2029 Symbol* sig = cp->uncached_signature_ref_at(index);
2030 methodHandle m (THREAD, k->find_method(name, sig));
2031 if (m.is_null()) {
2032 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2033 }
2034 oop method;
2035 if (m->is_object_constructor()) {
2036 method = Reflection::new_constructor(m, CHECK_NULL);
2037 } else {
2038 method = Reflection::new_method(m, true, CHECK_NULL);
2039 }
2040 return JNIHandles::make_local(method);
2041 }
2042
2043 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2044 {
2045 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2046 JvmtiVMObjectAllocEventCollector oam;
2047 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2048 bounds_check(cp, index, CHECK_NULL);
2049 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2050 return res;
2051 }
2052 JVM_END
2053
2054 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2055 {
2056 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2057 JvmtiVMObjectAllocEventCollector oam;
2058 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2059 bounds_check(cp, index, CHECK_NULL);
2060 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2061 return res;
2062 }
2063 JVM_END
2064
2065 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2066 constantTag tag = cp->tag_at(index);
2067 if (!tag.is_field()) {
2068 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2069 }
2070 int klass_ref = cp->uncached_klass_ref_index_at(index);
2071 Klass* k_o;
2072 if (force_resolution) {
2073 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2074 } else {
2075 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2076 if (k_o == NULL) return NULL;
2077 }
2078 InstanceKlass* k = InstanceKlass::cast(k_o);
2079 Symbol* name = cp->uncached_name_ref_at(index);
2080 Symbol* sig = cp->uncached_signature_ref_at(index);
2081 fieldDescriptor fd;
2082 Klass* target_klass = k->find_field(name, sig, &fd);
2083 if (target_klass == NULL) {
2084 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2085 }
2086 oop field = Reflection::new_field(&fd, CHECK_NULL);
2087 return JNIHandles::make_local(field);
2088 }
2089
2090 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2091 {
2092 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2093 JvmtiVMObjectAllocEventCollector oam;
2094 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2095 bounds_check(cp, index, CHECK_NULL);
2096 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2097 return res;
2098 }
2099 JVM_END
2100
2101 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2102 {
2103 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2104 JvmtiVMObjectAllocEventCollector oam;
2105 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2106 bounds_check(cp, index, CHECK_NULL);
2107 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2108 return res;
2109 }
2110 JVM_END
2111
2112 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2113 {
2114 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2115 JvmtiVMObjectAllocEventCollector oam;
2116 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117 bounds_check(cp, index, CHECK_NULL);
2118 constantTag tag = cp->tag_at(index);
2119 if (!tag.is_field_or_method()) {
2120 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2121 }
2122 int klass_ref = cp->uncached_klass_ref_index_at(index);
2123 Symbol* klass_name = cp->klass_name_at(klass_ref);
2124 Symbol* member_name = cp->uncached_name_ref_at(index);
2125 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2126 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2127 objArrayHandle dest(THREAD, dest_o);
2128 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2129 dest->obj_at_put(0, str());
2130 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2131 dest->obj_at_put(1, str());
2132 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2133 dest->obj_at_put(2, str());
2134 return (jobjectArray) JNIHandles::make_local(dest());
2135 }
2136 JVM_END
2137
2138 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2139 {
2140 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2141 JvmtiVMObjectAllocEventCollector oam;
2142 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_0);
2144 constantTag tag = cp->tag_at(index);
2145 if (!tag.is_field_or_method()) {
2146 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147 }
2148 return (jint) cp->uncached_klass_ref_index_at(index);
2149 }
2150 JVM_END
2151
2152 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2153 {
2154 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2155 JvmtiVMObjectAllocEventCollector oam;
2156 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157 bounds_check(cp, index, CHECK_0);
2158 constantTag tag = cp->tag_at(index);
2159 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2160 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2161 }
2162 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2163 }
2164 JVM_END
2165
2166 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2167 {
2168 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2169 JvmtiVMObjectAllocEventCollector oam;
2170 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_NULL);
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_name_and_type()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2177 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2178 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2179 objArrayHandle dest(THREAD, dest_o);
2180 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2181 dest->obj_at_put(0, str());
2182 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2183 dest->obj_at_put(1, str());
2184 return (jobjectArray) JNIHandles::make_local(dest());
2185 }
2186 JVM_END
2187
2188 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190 JVMWrapper("JVM_ConstantPoolGetIntAt");
2191 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2192 bounds_check(cp, index, CHECK_0);
2193 constantTag tag = cp->tag_at(index);
2194 if (!tag.is_int()) {
2195 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2196 }
2197 return cp->int_at(index);
2198 }
2199 JVM_END
2200
2201 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2202 {
2203 JVMWrapper("JVM_ConstantPoolGetLongAt");
2204 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2205 bounds_check(cp, index, CHECK_(0L));
2206 constantTag tag = cp->tag_at(index);
2207 if (!tag.is_long()) {
2208 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2209 }
2210 return cp->long_at(index);
2211 }
2212 JVM_END
2213
2214 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2215 {
2216 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2217 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2218 bounds_check(cp, index, CHECK_(0.0f));
2219 constantTag tag = cp->tag_at(index);
2220 if (!tag.is_float()) {
2221 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2222 }
2223 return cp->float_at(index);
2224 }
2225 JVM_END
2226
2227 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2228 {
2229 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2230 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2231 bounds_check(cp, index, CHECK_(0.0));
2232 constantTag tag = cp->tag_at(index);
2233 if (!tag.is_double()) {
2234 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2235 }
2236 return cp->double_at(index);
2237 }
2238 JVM_END
2239
2240 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2241 {
2242 JVMWrapper("JVM_ConstantPoolGetStringAt");
2243 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2244 bounds_check(cp, index, CHECK_NULL);
2245 constantTag tag = cp->tag_at(index);
2246 if (!tag.is_string()) {
2247 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2248 }
2249 oop str = cp->string_at(index, CHECK_NULL);
2250 return (jstring) JNIHandles::make_local(str);
2251 }
2252 JVM_END
2253
2254 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2255 {
2256 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2257 JvmtiVMObjectAllocEventCollector oam;
2258 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2259 bounds_check(cp, index, CHECK_NULL);
2260 constantTag tag = cp->tag_at(index);
2261 if (!tag.is_symbol()) {
2262 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2263 }
2264 Symbol* sym = cp->symbol_at(index);
2265 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2266 return (jstring) JNIHandles::make_local(str());
2267 }
2268 JVM_END
2269
2270 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2271 {
2272 JVMWrapper("JVM_ConstantPoolGetTagAt");
2273 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2274 bounds_check(cp, index, CHECK_0);
2275 constantTag tag = cp->tag_at(index);
2276 jbyte result = tag.value();
2277 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2278 // they are changed to the corresponding tags from the JVM spec, so that java code in
2279 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2280 if (tag.is_klass_or_reference()) {
2281 result = JVM_CONSTANT_Class;
2282 } else if (tag.is_string_index()) {
2283 result = JVM_CONSTANT_String;
2284 } else if (tag.is_method_type_in_error()) {
2285 result = JVM_CONSTANT_MethodType;
2286 } else if (tag.is_method_handle_in_error()) {
2287 result = JVM_CONSTANT_MethodHandle;
2288 } else if (tag.is_dynamic_constant_in_error()) {
2289 result = JVM_CONSTANT_Dynamic;
2290 }
2291 return result;
2292 }
2293 JVM_END
2294
2295 // Assertion support. //////////////////////////////////////////////////////////
2296
2297 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2298 JVMWrapper("JVM_DesiredAssertionStatus");
2299 assert(cls != NULL, "bad class");
2300
2301 oop r = JNIHandles::resolve(cls);
2302 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2303 if (java_lang_Class::is_primitive(r)) return false;
2304
2305 Klass* k = java_lang_Class::as_Klass(r);
2306 assert(k->is_instance_klass(), "must be an instance klass");
2307 if (!k->is_instance_klass()) return false;
2308
2309 ResourceMark rm(THREAD);
2310 const char* name = k->name()->as_C_string();
2311 bool system_class = k->class_loader() == NULL;
2312 return JavaAssertions::enabled(name, system_class);
2313
2314 JVM_END
2315
2316
2317 // Return a new AssertionStatusDirectives object with the fields filled in with
2318 // command-line assertion arguments (i.e., -ea, -da).
2319 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2320 JVMWrapper("JVM_AssertionStatusDirectives");
2321 JvmtiVMObjectAllocEventCollector oam;
2322 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2323 return JNIHandles::make_local(env, asd);
2324 JVM_END
2325
2326 // Arrays support /////////////////////////////////////////////////////////////
2327
2328 JVM_ENTRY(jboolean, JVM_ArrayIsAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2329 JVMWrapper("JVM_ArrayIsAccessAtomic");
2330 oop o = JNIHandles::resolve(array);
2331 Klass* k = o->klass();
2332 if ((o == NULL) || (!k->is_array_klass())) {
2333 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2334 }
2335 return ArrayKlass::cast(k)->element_access_is_atomic();
2336 JVM_END
2337
2338 JVM_ENTRY(jobject, JVM_ArrayEnsureAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2339 JVMWrapper("JVM_ArrayEnsureAccessAtomic");
2340 oop o = JNIHandles::resolve(array);
2341 Klass* k = o->klass();
2342 if ((o == NULL) || (!k->is_array_klass())) {
2343 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2344 }
2345 if (k->is_valueArray_klass()) {
2346 ValueArrayKlass* vk = ValueArrayKlass::cast(k);
2347 if (!vk->element_access_is_atomic()) {
2348 /**
2349 * Need to decide how to implement:
2350 *
2351 * 1) Change to objArrayOop layout, therefore oop->klass() differs so
2352 * then "<atomic>[Qfoo;" klass needs to subclass "[Qfoo;" to pass through
2353 * "checkcast" & "instanceof"
2354 *
2355 * 2) Use extra header in the valueArrayOop to flag atomicity required and
2356 * possibly per instance lock structure. Said info, could be placed in
2357 * "trailer" rather than disturb the current arrayOop
2358 */
2359 Unimplemented();
2360 }
2361 }
2362 return array;
2363 JVM_END
2364
2365 // Verification ////////////////////////////////////////////////////////////////////////////////
2366
2367 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2368
2369 // RedefineClasses support: bug 6214132 caused verification to fail.
2370 // All functions from this section should call the jvmtiThreadSate function:
2371 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2372 // The function returns a Klass* of the _scratch_class if the verifier
2373 // was invoked in the middle of the class redefinition.
2374 // Otherwise it returns its argument value which is the _the_class Klass*.
2375 // Please, refer to the description in the jvmtiThreadSate.hpp.
2376
2377 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2378 JVMWrapper("JVM_GetClassNameUTF");
2379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381 return k->name()->as_utf8();
2382 JVM_END
2383
2384
2385 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2386 JVMWrapper("JVM_GetClassCPTypes");
2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2389 // types will have length zero if this is not an InstanceKlass
2390 // (length is determined by call to JVM_GetClassCPEntriesCount)
2391 if (k->is_instance_klass()) {
2392 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2393 for (int index = cp->length() - 1; index >= 0; index--) {
2394 constantTag tag = cp->tag_at(index);
2395 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2396 }
2397 }
2398 JVM_END
2399
2400
2401 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2402 JVMWrapper("JVM_GetClassCPEntriesCount");
2403 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2404 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2406 JVM_END
2407
2408
2409 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2410 JVMWrapper("JVM_GetClassFieldsCount");
2411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2412 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2413 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2414 JVM_END
2415
2416
2417 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2418 JVMWrapper("JVM_GetClassMethodsCount");
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2422 JVM_END
2423
2424
2425 // The following methods, used for the verifier, are never called with
2426 // array klasses, so a direct cast to InstanceKlass is safe.
2427 // Typically, these methods are called in a loop with bounds determined
2428 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2429 // zero for arrays.
2430 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2431 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2432 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2435 int length = method->checked_exceptions_length();
2436 if (length > 0) {
2437 CheckedExceptionElement* table= method->checked_exceptions_start();
2438 for (int i = 0; i < length; i++) {
2439 exceptions[i] = table[i].class_cp_index;
2440 }
2441 }
2442 JVM_END
2443
2444
2445 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2446 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2448 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2449 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2450 return method->checked_exceptions_length();
2451 JVM_END
2452
2453
2454 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2455 JVMWrapper("JVM_GetMethodIxByteCode");
2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2458 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2459 memcpy(code, method->code_base(), method->code_size());
2460 JVM_END
2461
2462
2463 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2464 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 return method->code_size();
2469 JVM_END
2470
2471
2472 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2473 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2476 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2477 ExceptionTable extable(method);
2478 entry->start_pc = extable.start_pc(entry_index);
2479 entry->end_pc = extable.end_pc(entry_index);
2480 entry->handler_pc = extable.handler_pc(entry_index);
2481 entry->catchType = extable.catch_type_index(entry_index);
2482 JVM_END
2483
2484
2485 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2486 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2487 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2488 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2489 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2490 return method->exception_table_length();
2491 JVM_END
2492
2493
2494 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2495 JVMWrapper("JVM_GetMethodIxModifiers");
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->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2500 JVM_END
2501
2502
2503 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2504 JVMWrapper("JVM_GetFieldIxModifiers");
2505 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2506 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2507 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2508 JVM_END
2509
2510
2511 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2512 JVMWrapper("JVM_GetMethodIxLocalsCount");
2513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2514 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2515 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2516 return method->max_locals();
2517 JVM_END
2518
2519
2520 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2521 JVMWrapper("JVM_GetMethodIxArgsSize");
2522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2523 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2524 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2525 return method->size_of_parameters();
2526 JVM_END
2527
2528
2529 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2530 JVMWrapper("JVM_GetMethodIxMaxStack");
2531 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2532 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2533 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2534 return method->verifier_max_stack();
2535 JVM_END
2536
2537
2538 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2539 JVMWrapper("JVM_IsConstructorIx");
2540 ResourceMark rm(THREAD);
2541 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2542 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2543 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2544 return method->is_object_constructor();
2545 JVM_END
2546
2547
2548 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2549 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2550 ResourceMark rm(THREAD);
2551 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2553 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2554 return method->is_overpass();
2555 JVM_END
2556
2557 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2558 JVMWrapper("JVM_GetMethodIxIxUTF");
2559 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2560 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2561 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2562 return method->name()->as_utf8();
2563 JVM_END
2564
2565
2566 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2567 JVMWrapper("JVM_GetMethodIxSignatureUTF");
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(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2583 JVMWrapper("JVM_GetCPFieldNameUTF");
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587 switch (cp->tag_at(cp_index).value()) {
2588 case JVM_CONSTANT_Fieldref:
2589 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2590 default:
2591 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2592 }
2593 ShouldNotReachHere();
2594 return NULL;
2595 JVM_END
2596
2597
2598 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2599 JVMWrapper("JVM_GetCPMethodNameUTF");
2600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2601 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2602 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2603 switch (cp->tag_at(cp_index).value()) {
2604 case JVM_CONSTANT_InterfaceMethodref:
2605 case JVM_CONSTANT_Methodref:
2606 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2607 default:
2608 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2609 }
2610 ShouldNotReachHere();
2611 return NULL;
2612 JVM_END
2613
2614
2615 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2616 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2618 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2619 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2620 switch (cp->tag_at(cp_index).value()) {
2621 case JVM_CONSTANT_InterfaceMethodref:
2622 case JVM_CONSTANT_Methodref:
2623 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2624 default:
2625 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2626 }
2627 ShouldNotReachHere();
2628 return NULL;
2629 JVM_END
2630
2631
2632 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2633 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2634 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2635 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2636 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2637 switch (cp->tag_at(cp_index).value()) {
2638 case JVM_CONSTANT_Fieldref:
2639 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2640 default:
2641 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2642 }
2643 ShouldNotReachHere();
2644 return NULL;
2645 JVM_END
2646
2647
2648 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2649 JVMWrapper("JVM_GetCPClassNameUTF");
2650 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2651 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2652 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2653 Symbol* classname = cp->klass_name_at(cp_index);
2654 return classname->as_utf8();
2655 JVM_END
2656
2657
2658 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2659 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2660 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2661 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2662 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2663 switch (cp->tag_at(cp_index).value()) {
2664 case JVM_CONSTANT_Fieldref: {
2665 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2666 Symbol* classname = cp->klass_name_at(class_index);
2667 return classname->as_utf8();
2668 }
2669 default:
2670 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2671 }
2672 ShouldNotReachHere();
2673 return NULL;
2674 JVM_END
2675
2676
2677 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2678 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2679 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2680 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2681 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2682 switch (cp->tag_at(cp_index).value()) {
2683 case JVM_CONSTANT_Methodref:
2684 case JVM_CONSTANT_InterfaceMethodref: {
2685 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2686 Symbol* classname = cp->klass_name_at(class_index);
2687 return classname->as_utf8();
2688 }
2689 default:
2690 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2691 }
2692 ShouldNotReachHere();
2693 return NULL;
2694 JVM_END
2695
2696
2697 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2698 JVMWrapper("JVM_GetCPFieldModifiers");
2699 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2700 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2701 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2702 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2703 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2704 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2705 switch (cp->tag_at(cp_index).value()) {
2706 case JVM_CONSTANT_Fieldref: {
2707 Symbol* name = cp->uncached_name_ref_at(cp_index);
2708 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2709 InstanceKlass* ik = InstanceKlass::cast(k_called);
2710 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2711 if (fs.name() == name && fs.signature() == signature) {
2712 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2713 }
2714 }
2715 return -1;
2716 }
2717 default:
2718 fatal("JVM_GetCPFieldModifiers: illegal constant");
2719 }
2720 ShouldNotReachHere();
2721 return 0;
2722 JVM_END
2723
2724
2725 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2726 JVMWrapper("JVM_GetCPMethodModifiers");
2727 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2728 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2729 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2730 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2731 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2732 switch (cp->tag_at(cp_index).value()) {
2733 case JVM_CONSTANT_Methodref:
2734 case JVM_CONSTANT_InterfaceMethodref: {
2735 Symbol* name = cp->uncached_name_ref_at(cp_index);
2736 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2737 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2738 int methods_count = methods->length();
2739 for (int i = 0; i < methods_count; i++) {
2740 Method* method = methods->at(i);
2741 if (method->name() == name && method->signature() == signature) {
2742 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2743 }
2744 }
2745 return -1;
2746 }
2747 default:
2748 fatal("JVM_GetCPMethodModifiers: illegal constant");
2749 }
2750 ShouldNotReachHere();
2751 return 0;
2752 JVM_END
2753
2754
2755 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2756
2757 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2758 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2759 JVM_END
2760
2761
2762 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2763 JVMWrapper("JVM_IsSameClassPackage");
2764 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2765 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2766 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2767 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2768 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2769 JVM_END
2770
2771 // Printing support //////////////////////////////////////////////////
2772 extern "C" {
2773
2774 ATTRIBUTE_PRINTF(3, 0)
2775 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2776 // Reject count values that are negative signed values converted to
2777 // unsigned; see bug 4399518, 4417214
2778 if ((intptr_t)count <= 0) return -1;
2779
2780 int result = os::vsnprintf(str, count, fmt, args);
2781 if (result > 0 && (size_t)result >= count) {
2782 result = -1;
2783 }
2784
2785 return result;
2786 }
2787
2788 ATTRIBUTE_PRINTF(3, 4)
2789 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2790 va_list args;
2791 int len;
2792 va_start(args, fmt);
2793 len = jio_vsnprintf(str, count, fmt, args);
2794 va_end(args);
2795 return len;
2796 }
2797
2798 ATTRIBUTE_PRINTF(2, 3)
2799 int jio_fprintf(FILE* f, const char *fmt, ...) {
2800 int len;
2801 va_list args;
2802 va_start(args, fmt);
2803 len = jio_vfprintf(f, fmt, args);
2804 va_end(args);
2805 return len;
2806 }
2807
2808 ATTRIBUTE_PRINTF(2, 0)
2809 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2810 if (Arguments::vfprintf_hook() != NULL) {
2811 return Arguments::vfprintf_hook()(f, fmt, args);
2812 } else {
2813 return vfprintf(f, fmt, args);
2814 }
2815 }
2816
2817 ATTRIBUTE_PRINTF(1, 2)
2818 JNIEXPORT int jio_printf(const char *fmt, ...) {
2819 int len;
2820 va_list args;
2821 va_start(args, fmt);
2822 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2823 va_end(args);
2824 return len;
2825 }
2826
2827 // HotSpot specific jio method
2828 void jio_print(const char* s, size_t len) {
2829 // Try to make this function as atomic as possible.
2830 if (Arguments::vfprintf_hook() != NULL) {
2831 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2832 } else {
2833 // Make an unused local variable to avoid warning from gcc compiler.
2834 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2835 }
2836 }
2837
2838 } // Extern C
2839
2840 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2841
2842 // In most of the JVM thread support functions we need to access the
2843 // thread through a ThreadsListHandle to prevent it from exiting and
2844 // being reclaimed while we try to operate on it. The exceptions to this
2845 // rule are when operating on the current thread, or if the monitor of
2846 // the target java.lang.Thread is locked at the Java level - in both
2847 // cases the target cannot exit.
2848
2849 static void thread_entry(JavaThread* thread, TRAPS) {
2850 HandleMark hm(THREAD);
2851 Handle obj(THREAD, thread->threadObj());
2852 JavaValue result(T_VOID);
2853 JavaCalls::call_virtual(&result,
2854 obj,
2855 SystemDictionary::Thread_klass(),
2856 vmSymbols::run_method_name(),
2857 vmSymbols::void_method_signature(),
2858 THREAD);
2859 }
2860
2861
2862 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2863 JVMWrapper("JVM_StartThread");
2864 JavaThread *native_thread = NULL;
2865
2866 // We cannot hold the Threads_lock when we throw an exception,
2867 // due to rank ordering issues. Example: we might need to grab the
2868 // Heap_lock while we construct the exception.
2869 bool throw_illegal_thread_state = false;
2870
2871 // We must release the Threads_lock before we can post a jvmti event
2872 // in Thread::start.
2873 {
2874 // Ensure that the C++ Thread and OSThread structures aren't freed before
2875 // we operate.
2876 MutexLocker mu(Threads_lock);
2877
2878 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2879 // re-starting an already started thread, so we should usually find
2880 // that the JavaThread is null. However for a JNI attached thread
2881 // there is a small window between the Thread object being created
2882 // (with its JavaThread set) and the update to its threadStatus, so we
2883 // have to check for this
2884 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2885 throw_illegal_thread_state = true;
2886 } else {
2887 // We could also check the stillborn flag to see if this thread was already stopped, but
2888 // for historical reasons we let the thread detect that itself when it starts running
2889
2890 jlong size =
2891 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2892 // Allocate the C++ Thread structure and create the native thread. The
2893 // stack size retrieved from java is 64-bit signed, but the constructor takes
2894 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2895 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2896 // - Avoid passing negative values which would result in really large stacks.
2897 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2898 size_t sz = size > 0 ? (size_t) size : 0;
2899 native_thread = new JavaThread(&thread_entry, sz);
2900
2901 // At this point it may be possible that no osthread was created for the
2902 // JavaThread due to lack of memory. Check for this situation and throw
2903 // an exception if necessary. Eventually we may want to change this so
2904 // that we only grab the lock if the thread was created successfully -
2905 // then we can also do this check and throw the exception in the
2906 // JavaThread constructor.
2907 if (native_thread->osthread() != NULL) {
2908 // Note: the current thread is not being used within "prepare".
2909 native_thread->prepare(jthread);
2910 }
2911 }
2912 }
2913
2914 if (throw_illegal_thread_state) {
2915 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2916 }
2917
2918 assert(native_thread != NULL, "Starting null thread?");
2919
2920 if (native_thread->osthread() == NULL) {
2921 // No one should hold a reference to the 'native_thread'.
2922 native_thread->smr_delete();
2923 if (JvmtiExport::should_post_resource_exhausted()) {
2924 JvmtiExport::post_resource_exhausted(
2925 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2926 os::native_thread_creation_failed_msg());
2927 }
2928 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2929 os::native_thread_creation_failed_msg());
2930 }
2931
2932 Thread::start(native_thread);
2933
2934 JVM_END
2935
2936
2937 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2938 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2939 // but is thought to be reliable and simple. In the case, where the receiver is the
2940 // same thread as the sender, no VM_Operation is needed.
2941 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2942 JVMWrapper("JVM_StopThread");
2943
2944 // A nested ThreadsListHandle will grab the Threads_lock so create
2945 // tlh before we resolve throwable.
2946 ThreadsListHandle tlh(thread);
2947 oop java_throwable = JNIHandles::resolve(throwable);
2948 if (java_throwable == NULL) {
2949 THROW(vmSymbols::java_lang_NullPointerException());
2950 }
2951 oop java_thread = NULL;
2952 JavaThread* receiver = NULL;
2953 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2954 Events::log_exception(thread,
2955 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2956 p2i(receiver), p2i(java_thread), p2i(throwable));
2957
2958 if (is_alive) {
2959 // jthread refers to a live JavaThread.
2960 if (thread == receiver) {
2961 // Exception is getting thrown at self so no VM_Operation needed.
2962 THROW_OOP(java_throwable);
2963 } else {
2964 // Use a VM_Operation to throw the exception.
2965 Thread::send_async_exception(java_thread, java_throwable);
2966 }
2967 } else {
2968 // Either:
2969 // - target thread has not been started before being stopped, or
2970 // - target thread already terminated
2971 // We could read the threadStatus to determine which case it is
2972 // but that is overkill as it doesn't matter. We must set the
2973 // stillborn flag for the first case, and if the thread has already
2974 // exited setting this flag has no effect.
2975 java_lang_Thread::set_stillborn(java_thread);
2976 }
2977 JVM_END
2978
2979
2980 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2981 JVMWrapper("JVM_IsThreadAlive");
2982
2983 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2984 return java_lang_Thread::is_alive(thread_oop);
2985 JVM_END
2986
2987
2988 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2989 JVMWrapper("JVM_SuspendThread");
2990
2991 ThreadsListHandle tlh(thread);
2992 JavaThread* receiver = NULL;
2993 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2994 if (is_alive) {
2995 // jthread refers to a live JavaThread.
2996 {
2997 MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2998 if (receiver->is_external_suspend()) {
2999 // Don't allow nested external suspend requests. We can't return
3000 // an error from this interface so just ignore the problem.
3001 return;
3002 }
3003 if (receiver->is_exiting()) { // thread is in the process of exiting
3004 return;
3005 }
3006 receiver->set_external_suspend();
3007 }
3008
3009 // java_suspend() will catch threads in the process of exiting
3010 // and will ignore them.
3011 receiver->java_suspend();
3012
3013 // It would be nice to have the following assertion in all the
3014 // time, but it is possible for a racing resume request to have
3015 // resumed this thread right after we suspended it. Temporarily
3016 // enable this assertion if you are chasing a different kind of
3017 // bug.
3018 //
3019 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3020 // receiver->is_being_ext_suspended(), "thread is not suspended");
3021 }
3022 JVM_END
3023
3024
3025 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3026 JVMWrapper("JVM_ResumeThread");
3027
3028 ThreadsListHandle tlh(thread);
3029 JavaThread* receiver = NULL;
3030 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3031 if (is_alive) {
3032 // jthread refers to a live JavaThread.
3033
3034 // This is the original comment for this Threads_lock grab:
3035 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3036 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3037 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3038 // looks at it.
3039 //
3040 // The above comment dates back to when we had both internal and
3041 // external suspend APIs that shared a common underlying mechanism.
3042 // External suspend is now entirely cooperative and doesn't share
3043 // anything with internal suspend. That said, there are some
3044 // assumptions in the VM that an external resume grabs the
3045 // Threads_lock. We can't drop the Threads_lock grab here until we
3046 // resolve the assumptions that exist elsewhere.
3047 //
3048 MutexLocker ml(Threads_lock);
3049 receiver->java_resume();
3050 }
3051 JVM_END
3052
3053
3054 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3055 JVMWrapper("JVM_SetThreadPriority");
3056
3057 ThreadsListHandle tlh(thread);
3058 oop java_thread = NULL;
3059 JavaThread* receiver = NULL;
3060 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3061 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3062
3063 if (is_alive) {
3064 // jthread refers to a live JavaThread.
3065 Thread::set_priority(receiver, (ThreadPriority)prio);
3066 }
3067 // Implied else: If the JavaThread hasn't started yet, then the
3068 // priority set in the java.lang.Thread object above will be pushed
3069 // down when it does start.
3070 JVM_END
3071
3072
3073 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3074 JVMWrapper("JVM_Yield");
3075 if (os::dont_yield()) return;
3076 HOTSPOT_THREAD_YIELD();
3077 os::naked_yield();
3078 JVM_END
3079
3080 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3081 assert(event != NULL, "invariant");
3082 assert(event->should_commit(), "invariant");
3083 event->set_time(millis);
3084 event->commit();
3085 }
3086
3087 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3088 JVMWrapper("JVM_Sleep");
3089
3090 if (millis < 0) {
3091 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3092 }
3093
3094 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3095 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3096 }
3097
3098 // Save current thread state and restore it at the end of this block.
3099 // And set new thread state to SLEEPING.
3100 JavaThreadSleepState jtss(thread);
3101
3102 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3103 EventThreadSleep event;
3104
3105 if (millis == 0) {
3106 os::naked_yield();
3107 } else {
3108 ThreadState old_state = thread->osthread()->get_state();
3109 thread->osthread()->set_state(SLEEPING);
3110 if (!thread->sleep(millis)) { // interrupted
3111 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3112 // us while we were sleeping. We do not overwrite those.
3113 if (!HAS_PENDING_EXCEPTION) {
3114 if (event.should_commit()) {
3115 post_thread_sleep_event(&event, millis);
3116 }
3117 HOTSPOT_THREAD_SLEEP_END(1);
3118
3119 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3120 // to properly restore the thread state. That's likely wrong.
3121 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3122 }
3123 }
3124 thread->osthread()->set_state(old_state);
3125 }
3126 if (event.should_commit()) {
3127 post_thread_sleep_event(&event, millis);
3128 }
3129 HOTSPOT_THREAD_SLEEP_END(0);
3130 JVM_END
3131
3132 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3133 JVMWrapper("JVM_CurrentThread");
3134 oop jthread = thread->threadObj();
3135 assert (thread != NULL, "no current thread!");
3136 return JNIHandles::make_local(env, jthread);
3137 JVM_END
3138
3139 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3140 JVMWrapper("JVM_Interrupt");
3141
3142 ThreadsListHandle tlh(thread);
3143 JavaThread* receiver = NULL;
3144 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3145 if (is_alive) {
3146 // jthread refers to a live JavaThread.
3147 receiver->interrupt();
3148 }
3149 JVM_END
3150
3151
3152 // Return true iff the current thread has locked the object passed in
3153
3154 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3155 JVMWrapper("JVM_HoldsLock");
3156 assert(THREAD->is_Java_thread(), "sanity check");
3157 if (obj == NULL) {
3158 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3159 }
3160 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3161 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3162 JVM_END
3163
3164
3165 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3166 JVMWrapper("JVM_DumpAllStacks");
3167 VM_PrintThreads op;
3168 VMThread::execute(&op);
3169 if (JvmtiExport::should_post_data_dump()) {
3170 JvmtiExport::post_data_dump();
3171 }
3172 JVM_END
3173
3174 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3175 JVMWrapper("JVM_SetNativeThreadName");
3176
3177 // We don't use a ThreadsListHandle here because the current thread
3178 // must be alive.
3179 oop java_thread = JNIHandles::resolve_non_null(jthread);
3180 JavaThread* thr = java_lang_Thread::thread(java_thread);
3181 if (thread == thr && !thr->has_attached_via_jni()) {
3182 // Thread naming is only supported for the current thread and
3183 // we don't set the name of an attached thread to avoid stepping
3184 // on other programs.
3185 ResourceMark rm(thread);
3186 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3187 os::set_native_thread_name(thread_name);
3188 }
3189 JVM_END
3190
3191 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3192
3193 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3194 JVMWrapper("JVM_GetClassContext");
3195 ResourceMark rm(THREAD);
3196 JvmtiVMObjectAllocEventCollector oam;
3197 vframeStream vfst(thread);
3198
3199 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3200 // This must only be called from SecurityManager.getClassContext
3201 Method* m = vfst.method();
3202 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3203 m->name() == vmSymbols::getClassContext_name() &&
3204 m->signature() == vmSymbols::void_class_array_signature())) {
3205 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3206 }
3207 }
3208
3209 // Collect method holders
3210 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3211 for (; !vfst.at_end(); vfst.security_next()) {
3212 Method* m = vfst.method();
3213 // Native frames are not returned
3214 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3215 Klass* holder = m->method_holder();
3216 assert(holder->is_klass(), "just checking");
3217 klass_array->append(holder);
3218 }
3219 }
3220
3221 // Create result array of type [Ljava/lang/Class;
3222 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3223 // Fill in mirrors corresponding to method holders
3224 for (int i = 0; i < klass_array->length(); i++) {
3225 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3226 }
3227
3228 return (jobjectArray) JNIHandles::make_local(env, result);
3229 JVM_END
3230
3231
3232 // java.lang.Package ////////////////////////////////////////////////////////////////
3233
3234
3235 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3236 JVMWrapper("JVM_GetSystemPackage");
3237 ResourceMark rm(THREAD);
3238 JvmtiVMObjectAllocEventCollector oam;
3239 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3240 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3241 return (jstring) JNIHandles::make_local(result);
3242 JVM_END
3243
3244
3245 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3246 JVMWrapper("JVM_GetSystemPackages");
3247 JvmtiVMObjectAllocEventCollector oam;
3248 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3249 return (jobjectArray) JNIHandles::make_local(result);
3250 JVM_END
3251
3252
3253 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3254
3255
3256 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3257 JVMWrapper("JVM_GetAndClearReferencePendingList");
3258
3259 MonitorLocker ml(Heap_lock);
3260 oop ref = Universe::reference_pending_list();
3261 if (ref != NULL) {
3262 Universe::set_reference_pending_list(NULL);
3263 }
3264 return JNIHandles::make_local(env, ref);
3265 JVM_END
3266
3267 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3268 JVMWrapper("JVM_HasReferencePendingList");
3269 MonitorLocker ml(Heap_lock);
3270 return Universe::has_reference_pending_list();
3271 JVM_END
3272
3273 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3274 JVMWrapper("JVM_WaitForReferencePendingList");
3275 MonitorLocker ml(Heap_lock);
3276 while (!Universe::has_reference_pending_list()) {
3277 ml.wait();
3278 }
3279 JVM_END
3280
3281
3282 // ObjectInputStream ///////////////////////////////////////////////////////////////
3283
3284 // Return the first user-defined class loader up the execution stack, or null
3285 // if only code from the bootstrap or platform class loader is on the stack.
3286
3287 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3288 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3289 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3290 oop loader = vfst.method()->method_holder()->class_loader();
3291 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3292 return JNIHandles::make_local(env, loader);
3293 }
3294 }
3295 return NULL;
3296 JVM_END
3297
3298
3299 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3300
3301
3302 // resolve array handle and check arguments
3303 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3304 if (arr == NULL) {
3305 THROW_0(vmSymbols::java_lang_NullPointerException());
3306 }
3307 oop a = JNIHandles::resolve_non_null(arr);
3308 if (!a->is_array()) {
3309 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3310 } else if (type_array_only && !a->is_typeArray()) {
3311 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3312 }
3313 return arrayOop(a);
3314 }
3315
3316
3317 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3318 JVMWrapper("JVM_GetArrayLength");
3319 arrayOop a = check_array(env, arr, false, CHECK_0);
3320 return a->length();
3321 JVM_END
3322
3323
3324 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3325 JVMWrapper("JVM_Array_Get");
3326 JvmtiVMObjectAllocEventCollector oam;
3327 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3328 jvalue value;
3329 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3330 oop box = Reflection::box(&value, type, CHECK_NULL);
3331 return JNIHandles::make_local(env, box);
3332 JVM_END
3333
3334
3335 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3336 JVMWrapper("JVM_GetPrimitiveArrayElement");
3337 jvalue value;
3338 value.i = 0; // to initialize value before getting used in CHECK
3339 arrayOop a = check_array(env, arr, true, CHECK_(value));
3340 assert(a->is_typeArray(), "just checking");
3341 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3342 BasicType wide_type = (BasicType) wCode;
3343 if (type != wide_type) {
3344 Reflection::widen(&value, type, wide_type, CHECK_(value));
3345 }
3346 return value;
3347 JVM_END
3348
3349
3350 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3351 JVMWrapper("JVM_SetArrayElement");
3352 arrayOop a = check_array(env, arr, false, CHECK);
3353 oop box = JNIHandles::resolve(val);
3354 jvalue value;
3355 value.i = 0; // to initialize value before getting used in CHECK
3356 BasicType value_type;
3357 if (a->is_objArray()) {
3358 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3359 value_type = Reflection::unbox_for_regular_object(box, &value);
3360 } else {
3361 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3362 }
3363 Reflection::array_set(&value, a, index, value_type, CHECK);
3364 JVM_END
3365
3366
3367 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3368 JVMWrapper("JVM_SetPrimitiveArrayElement");
3369 arrayOop a = check_array(env, arr, true, CHECK);
3370 assert(a->is_typeArray(), "just checking");
3371 BasicType value_type = (BasicType) vCode;
3372 Reflection::array_set(&v, a, index, value_type, CHECK);
3373 JVM_END
3374
3375
3376 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3377 JVMWrapper("JVM_NewArray");
3378 JvmtiVMObjectAllocEventCollector oam;
3379 oop element_mirror = JNIHandles::resolve(eltClass);
3380 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3381 return JNIHandles::make_local(env, result);
3382 JVM_END
3383
3384
3385 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3386 JVMWrapper("JVM_NewMultiArray");
3387 JvmtiVMObjectAllocEventCollector oam;
3388 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3389 oop element_mirror = JNIHandles::resolve(eltClass);
3390 assert(dim_array->is_typeArray(), "just checking");
3391 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3392 return JNIHandles::make_local(env, result);
3393 JVM_END
3394
3395
3396 // Library support ///////////////////////////////////////////////////////////////////////////
3397
3398 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3399 //%note jvm_ct
3400 JVMWrapper("JVM_LoadLibrary");
3401 char ebuf[1024];
3402 void *load_result;
3403 {
3404 ThreadToNativeFromVM ttnfvm(thread);
3405 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3406 }
3407 if (load_result == NULL) {
3408 char msg[1024];
3409 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3410 // Since 'ebuf' may contain a string encoded using
3411 // platform encoding scheme, we need to pass
3412 // Exceptions::unsafe_to_utf8 to the new_exception method
3413 // as the last argument. See bug 6367357.
3414 Handle h_exception =
3415 Exceptions::new_exception(thread,
3416 vmSymbols::java_lang_UnsatisfiedLinkError(),
3417 msg, Exceptions::unsafe_to_utf8);
3418
3419 THROW_HANDLE_0(h_exception);
3420 }
3421 return load_result;
3422 JVM_END
3423
3424
3425 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3426 JVMWrapper("JVM_UnloadLibrary");
3427 os::dll_unload(handle);
3428 JVM_END
3429
3430
3431 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3432 JVMWrapper("JVM_FindLibraryEntry");
3433 return os::dll_lookup(handle, name);
3434 JVM_END
3435
3436
3437 // JNI version ///////////////////////////////////////////////////////////////////////////////
3438
3439 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3440 JVMWrapper("JVM_IsSupportedJNIVersion");
3441 return Threads::is_supported_jni_version_including_1_1(version);
3442 JVM_END
3443
3444
3445 // String support ///////////////////////////////////////////////////////////////////////////
3446
3447 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3448 JVMWrapper("JVM_InternString");
3449 JvmtiVMObjectAllocEventCollector oam;
3450 if (str == NULL) return NULL;
3451 oop string = JNIHandles::resolve_non_null(str);
3452 oop result = StringTable::intern(string, CHECK_NULL);
3453 return (jstring) JNIHandles::make_local(env, result);
3454 JVM_END
3455
3456
3457 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3458
3459 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3460 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3461 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3462 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3463 // nature. JavaThreads will be "in native" when using this API from JDK code.
3464
3465
3466 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3467 VM_Exit::block_if_vm_exited();
3468 JVMWrapper("JVM_RawMonitorCreate");
3469 return new os::PlatformMutex();
3470 }
3471
3472
3473 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3474 VM_Exit::block_if_vm_exited();
3475 JVMWrapper("JVM_RawMonitorDestroy");
3476 delete ((os::PlatformMutex*) mon);
3477 }
3478
3479
3480 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3481 VM_Exit::block_if_vm_exited();
3482 JVMWrapper("JVM_RawMonitorEnter");
3483 ((os::PlatformMutex*) mon)->lock();
3484 return 0;
3485 }
3486
3487
3488 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3489 VM_Exit::block_if_vm_exited();
3490 JVMWrapper("JVM_RawMonitorExit");
3491 ((os::PlatformMutex*) mon)->unlock();
3492 }
3493
3494
3495 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3496
3497 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3498 Handle loader, Handle protection_domain,
3499 jboolean throwError, TRAPS) {
3500 // Security Note:
3501 // The Java level wrapper will perform the necessary security check allowing
3502 // us to pass the NULL as the initiating class loader. The VM is responsible for
3503 // the checkPackageAccess relative to the initiating class loader via the
3504 // protection_domain. The protection_domain is passed as NULL by the java code
3505 // if there is no security manager in 3-arg Class.forName().
3506 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3507
3508 // Check if we should initialize the class
3509 if (init && klass->is_instance_klass()) {
3510 klass->initialize(CHECK_NULL);
3511 }
3512 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3513 }
3514
3515
3516 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3517
3518 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3519 JVMWrapper("JVM_InvokeMethod");
3520 Handle method_handle;
3521 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3522 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3523 Handle receiver(THREAD, JNIHandles::resolve(obj));
3524 objArrayHandle args = oopFactory::ensure_objArray(JNIHandles::resolve(args0), CHECK_NULL);
3525 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3526 jobject res = JNIHandles::make_local(env, result);
3527 if (JvmtiExport::should_post_vm_object_alloc()) {
3528 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3529 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3530 if (java_lang_Class::is_primitive(ret_type)) {
3531 // Only for primitive type vm allocates memory for java object.
3532 // See box() method.
3533 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3534 }
3535 }
3536 return res;
3537 } else {
3538 THROW_0(vmSymbols::java_lang_StackOverflowError());
3539 }
3540 JVM_END
3541
3542
3543 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3544 JVMWrapper("JVM_NewInstanceFromConstructor");
3545 objArrayHandle args = oopFactory::ensure_objArray(JNIHandles::resolve(args0), CHECK_NULL);
3546 oop constructor_mirror = JNIHandles::resolve(c);
3547 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3548 jobject res = JNIHandles::make_local(env, result);
3549 if (JvmtiExport::should_post_vm_object_alloc()) {
3550 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3551 }
3552 return res;
3553 JVM_END
3554
3555 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3556
3557 JVM_LEAF(jboolean, JVM_SupportsCX8())
3558 JVMWrapper("JVM_SupportsCX8");
3559 return VM_Version::supports_cx8();
3560 JVM_END
3561
3562 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3563 JVMWrapper("JVM_InitializeFromArchive");
3564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3565 assert(k->is_klass(), "just checking");
3566 HeapShared::initialize_from_archived_subgraph(k);
3567 JVM_END
3568
3569 // Returns an array of all live Thread objects (VM internal JavaThreads,
3570 // jvmti agent threads, and JNI attaching threads are skipped)
3571 // See CR 6404306 regarding JNI attaching threads
3572 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3573 ResourceMark rm(THREAD);
3574 ThreadsListEnumerator tle(THREAD, false, false);
3575 JvmtiVMObjectAllocEventCollector oam;
3576
3577 int num_threads = tle.num_threads();
3578 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3579 objArrayHandle threads_ah(THREAD, r);
3580
3581 for (int i = 0; i < num_threads; i++) {
3582 Handle h = tle.get_threadObj(i);
3583 threads_ah->obj_at_put(i, h());
3584 }
3585
3586 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3587 JVM_END
3588
3589
3590 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3591 // Return StackTraceElement[][], each element is the stack trace of a thread in
3592 // the corresponding entry in the given threads array
3593 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3594 JVMWrapper("JVM_DumpThreads");
3595 JvmtiVMObjectAllocEventCollector oam;
3596
3597 // Check if threads is null
3598 if (threads == NULL) {
3599 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3600 }
3601
3602 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3603 objArrayHandle ah(THREAD, a);
3604 int num_threads = ah->length();
3605 // check if threads is non-empty array
3606 if (num_threads == 0) {
3607 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3608 }
3609
3610 // check if threads is not an array of objects of Thread class
3611 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3612 if (k != SystemDictionary::Thread_klass()) {
3613 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3614 }
3615
3616 ResourceMark rm(THREAD);
3617
3618 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3619 for (int i = 0; i < num_threads; i++) {
3620 oop thread_obj = ah->obj_at(i);
3621 instanceHandle h(THREAD, (instanceOop) thread_obj);
3622 thread_handle_array->append(h);
3623 }
3624
3625 // The JavaThread references in thread_handle_array are validated
3626 // in VM_ThreadDump::doit().
3627 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3628 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3629
3630 JVM_END
3631
3632 // JVM monitoring and management support
3633 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3634 return Management::get_jmm_interface(version);
3635 JVM_END
3636
3637 // com.sun.tools.attach.VirtualMachine agent properties support
3638 //
3639 // Initialize the agent properties with the properties maintained in the VM
3640 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3641 JVMWrapper("JVM_InitAgentProperties");
3642 ResourceMark rm;
3643
3644 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3645
3646 PUTPROP(props, "sun.java.command", Arguments::java_command());
3647 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3648 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3649 return properties;
3650 JVM_END
3651
3652 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3653 {
3654 JVMWrapper("JVM_GetEnclosingMethodInfo");
3655 JvmtiVMObjectAllocEventCollector oam;
3656
3657 if (ofClass == NULL) {
3658 return NULL;
3659 }
3660 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3661 // Special handling for primitive objects
3662 if (java_lang_Class::is_primitive(mirror())) {
3663 return NULL;
3664 }
3665 Klass* k = java_lang_Class::as_Klass(mirror());
3666 if (!k->is_instance_klass()) {
3667 return NULL;
3668 }
3669 InstanceKlass* ik = InstanceKlass::cast(k);
3670 int encl_method_class_idx = ik->enclosing_method_class_index();
3671 if (encl_method_class_idx == 0) {
3672 return NULL;
3673 }
3674 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3675 objArrayHandle dest(THREAD, dest_o);
3676 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3677 dest->obj_at_put(0, enc_k->java_mirror());
3678 int encl_method_method_idx = ik->enclosing_method_method_index();
3679 if (encl_method_method_idx != 0) {
3680 Symbol* sym = ik->constants()->symbol_at(
3681 extract_low_short_from_int(
3682 ik->constants()->name_and_type_at(encl_method_method_idx)));
3683 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3684 dest->obj_at_put(1, str());
3685 sym = ik->constants()->symbol_at(
3686 extract_high_short_from_int(
3687 ik->constants()->name_and_type_at(encl_method_method_idx)));
3688 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3689 dest->obj_at_put(2, str());
3690 }
3691 return (jobjectArray) JNIHandles::make_local(dest());
3692 }
3693 JVM_END
3694
3695 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3696 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3697 ResourceMark rm(THREAD);
3698
3699 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3700 return NULL;
3701 }
3702
3703 char** vm_flags = Arguments::jvm_flags_array();
3704 char** vm_args = Arguments::jvm_args_array();
3705 int num_flags = Arguments::num_jvm_flags();
3706 int num_args = Arguments::num_jvm_args();
3707
3708 InstanceKlass* ik = SystemDictionary::String_klass();
3709 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3710 objArrayHandle result_h(THREAD, r);
3711
3712 int index = 0;
3713 for (int j = 0; j < num_flags; j++, index++) {
3714 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3715 result_h->obj_at_put(index, h());
3716 }
3717 for (int i = 0; i < num_args; i++, index++) {
3718 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3719 result_h->obj_at_put(index, h());
3720 }
3721 return (jobjectArray) JNIHandles::make_local(env, result_h());
3722 JVM_END
3723
3724 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3725 return os::get_signal_number(name);
3726 JVM_END