1 /*
2 * Copyright (c) 1997, 2019, 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/systemDictionary.hpp"
37 #include "classfile/vmSymbols.hpp"
38 #include "gc/shared/collectedHeap.inline.hpp"
39 #include "interpreter/bytecode.hpp"
40 #include "jfr/jfrEvents.hpp"
41 #include "logging/log.hpp"
42 #include "memory/heapShared.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/referenceType.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/access.inline.hpp"
48 #include "oops/constantPool.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/method.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/valueArrayKlass.hpp"
56 #include "prims/jvm_misc.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "prims/nativeLookup.hpp"
60 #include "prims/stackwalk.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/init.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/deoptimization.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/jniHandles.inline.hpp"
71 #include "runtime/orderAccess.hpp"
72 #include "runtime/os.inline.hpp"
73 #include "runtime/perfData.hpp"
74 #include "runtime/reflection.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/threadSMR.hpp"
77 #include "runtime/vframe.inline.hpp"
78 #include "runtime/vmOperations.hpp"
79 #include "runtime/vm_version.hpp"
80 #include "services/attachListener.hpp"
81 #include "services/management.hpp"
82 #include "services/threadService.hpp"
83 #include "utilities/copy.hpp"
84 #include "utilities/defaultStream.hpp"
85 #include "utilities/dtrace.hpp"
86 #include "utilities/events.hpp"
87 #include "utilities/histogram.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/utf8.hpp"
90 #if INCLUDE_CDS
91 #include "classfile/systemDictionaryShared.hpp"
92 #endif
93
94 #include <errno.h>
95
96 /*
97 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
98 such ctors and calls MUST NOT come between an oop declaration/init and its
99 usage because if objects are move this may cause various memory stomps, bus
100 errors and segfaults. Here is a cookbook for causing so called "naked oop
101 failures":
102
103 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
104 JVMWrapper("JVM_GetClassDeclaredFields");
105
106 // Object address to be held directly in mirror & not visible to GC
107 oop mirror = JNIHandles::resolve_non_null(ofClass);
108
109 // If this ctor can hit a safepoint, moving objects around, then
110 ComplexConstructor foo;
111
112 // Boom! mirror may point to JUNK instead of the intended object
113 (some dereference of mirror)
114
115 // Here's another call that may block for GC, making mirror stale
116 MutexLocker ml(some_lock);
117
118 // And here's an initializer that can result in a stale oop
119 // all in one step.
120 oop o = call_that_can_throw_exception(TRAPS);
121
122
123 The solution is to keep the oop declaration BELOW the ctor or function
124 call that might cause a GC, do another resolve to reassign the oop, or
125 consider use of a Handle instead of an oop so there is immunity from object
126 motion. But note that the "QUICK" entries below do not have a handlemark
127 and thus can only support use of handles passed in.
128 */
129
130 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
131 ResourceMark rm;
132 int line_number = -1;
133 const char * source_file = NULL;
134 const char * trace = "explicit";
135 InstanceKlass* caller = NULL;
136 JavaThread* jthread = JavaThread::current();
137 if (jthread->has_last_Java_frame()) {
138 vframeStream vfst(jthread);
139
140 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
141 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
142 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
143 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
144 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
145
146 Method* last_caller = NULL;
147
148 while (!vfst.at_end()) {
149 Method* m = vfst.method();
150 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
151 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
152 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
153 break;
154 }
155 last_caller = m;
156 vfst.next();
157 }
158 // if this is called from Class.forName0 and that is called from Class.forName,
159 // then print the caller of Class.forName. If this is Class.loadClass, then print
160 // that caller, otherwise keep quiet since this should be picked up elsewhere.
161 bool found_it = false;
162 if (!vfst.at_end() &&
163 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
164 vfst.method()->name() == vmSymbols::forName0_name()) {
165 vfst.next();
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName_name()) {
169 vfst.next();
170 found_it = true;
171 }
172 } else if (last_caller != NULL &&
173 last_caller->method_holder()->name() ==
174 vmSymbols::java_lang_ClassLoader() &&
175 last_caller->name() == vmSymbols::loadClass_name()) {
176 found_it = true;
177 } else if (!vfst.at_end()) {
178 if (vfst.method()->is_native()) {
179 // JNI call
180 found_it = true;
181 }
182 }
183 if (found_it && !vfst.at_end()) {
184 // found the caller
185 caller = vfst.method()->method_holder();
186 line_number = vfst.method()->line_number_from_bci(vfst.bci());
187 if (line_number == -1) {
188 // show method name if it's a native method
189 trace = vfst.method()->name_and_sig_as_C_string();
190 }
191 Symbol* s = caller->source_file_name();
192 if (s != NULL) {
193 source_file = s->as_C_string();
194 }
195 }
196 }
197 if (caller != NULL) {
198 if (to_class != caller) {
199 const char * from = caller->external_name();
200 const char * to = to_class->external_name();
201 // print in a single call to reduce interleaving between threads
202 if (source_file != NULL) {
203 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
204 } else {
205 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
206 }
207 }
208 }
209 }
210
211 void trace_class_resolution(Klass* to_class) {
212 EXCEPTION_MARK;
213 trace_class_resolution_impl(to_class, THREAD);
214 if (HAS_PENDING_EXCEPTION) {
215 CLEAR_PENDING_EXCEPTION;
216 }
217 }
218
219 // Wrapper to trace JVM functions
220
221 #ifdef ASSERT
222 Histogram* JVMHistogram;
223 volatile int JVMHistogram_lock = 0;
224
225 class JVMHistogramElement : public HistogramElement {
226 public:
227 JVMHistogramElement(const char* name);
228 };
229
230 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
231 _name = elementName;
232 uintx count = 0;
233
234 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
235 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
236 count +=1;
237 if ( (WarnOnStalledSpinLock > 0)
238 && (count % WarnOnStalledSpinLock == 0)) {
239 warning("JVMHistogram_lock seems to be stalled");
240 }
241 }
242 }
243
244 if(JVMHistogram == NULL)
245 JVMHistogram = new Histogram("JVM Call Counts",100);
246
247 JVMHistogram->add_element(this);
248 Atomic::dec(&JVMHistogram_lock);
249 }
250
251 #define JVMCountWrapper(arg) \
252 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
253 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
254
255 #define JVMWrapper(arg) JVMCountWrapper(arg);
256 #else
257 #define JVMWrapper(arg)
258 #endif
259
260
261 // Interface version /////////////////////////////////////////////////////////////////////
262
263
264 JVM_LEAF(jint, JVM_GetInterfaceVersion())
265 return JVM_INTERFACE_VERSION;
266 JVM_END
267
268
269 // java.lang.System //////////////////////////////////////////////////////////////////////
270
271
272 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
273 JVMWrapper("JVM_CurrentTimeMillis");
274 return os::javaTimeMillis();
275 JVM_END
276
277 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
278 JVMWrapper("JVM_NanoTime");
279 return os::javaTimeNanos();
280 JVM_END
281
282 // The function below is actually exposed by jdk.internal.misc.VM and not
283 // java.lang.System, but we choose to keep it here so that it stays next
284 // to JVM_CurrentTimeMillis and JVM_NanoTime
285
286 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
287 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
288
289 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
290 JVMWrapper("JVM_GetNanoTimeAdjustment");
291 jlong seconds;
292 jlong nanos;
293
294 os::javaTimeSystemUTC(seconds, nanos);
295
296 // We're going to verify that the result can fit in a long.
297 // For that we need the difference in seconds between 'seconds'
298 // and 'offset_secs' to be such that:
299 // |seconds - offset_secs| < (2^63/10^9)
300 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
301 // which makes |seconds - offset_secs| < 2^33
302 // and we will prefer +/- 2^32 as the maximum acceptable diff
303 // as 2^32 has a more natural feel than 2^33...
304 //
305 // So if |seconds - offset_secs| >= 2^32 - we return a special
306 // sentinel value (-1) which the caller should take as an
307 // exception value indicating that the offset given to us is
308 // too far from range of the current time - leading to too big
309 // a nano adjustment. The caller is expected to recover by
310 // computing a more accurate offset and calling this method
311 // again. (For the record 2^32 secs is ~136 years, so that
312 // should rarely happen)
313 //
314 jlong diff = seconds - offset_secs;
315 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
316 return -1; // sentinel value: the offset is too far off the target
317 }
318
319 // return the adjustment. If you compute a time by adding
320 // this number of nanoseconds along with the number of seconds
321 // in the offset you should get the current UTC time.
322 return (diff * (jlong)1000000000) + nanos;
323 JVM_END
324
325 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
326 jobject dst, jint dst_pos, jint length))
327 JVMWrapper("JVM_ArrayCopy");
328 // Check if we have null pointers
329 if (src == NULL || dst == NULL) {
330 THROW(vmSymbols::java_lang_NullPointerException());
331 }
332 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
333 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
334 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
335 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
336 // Do copy
337 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
338 JVM_END
339
340
341 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
342 JavaValue r(T_OBJECT);
343 // public synchronized Object put(Object key, Object value);
344 HandleMark hm(THREAD);
345 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
346 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
347 JavaCalls::call_virtual(&r,
348 props,
349 SystemDictionary::Properties_klass(),
350 vmSymbols::put_name(),
351 vmSymbols::object_object_object_signature(),
352 key_str,
353 value_str,
354 THREAD);
355 }
356
357
358 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
359
360 /*
361 * Return all of the system properties in a Java String array with alternating
362 * names and values from the jvm SystemProperty.
363 * Which includes some internal and all commandline -D defined properties.
364 */
365 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
366 JVMWrapper("JVM_GetProperties");
367 ResourceMark rm(THREAD);
368 HandleMark hm(THREAD);
369 int ndx = 0;
370 int fixedCount = 2;
371
372 SystemProperty* p = Arguments::system_properties();
373 int count = Arguments::PropertyList_count(p);
374
375 // Allocate result String array
376 InstanceKlass* ik = SystemDictionary::String_klass();
377 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
378 objArrayHandle result_h(THREAD, r);
379
380 while (p != NULL) {
381 const char * key = p->key();
382 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
383 const char * value = p->value();
384 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
385 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
386 result_h->obj_at_put(ndx * 2, key_str());
387 result_h->obj_at_put(ndx * 2 + 1, value_str());
388 ndx++;
389 }
390 p = p->next();
391 }
392
393 // Convert the -XX:MaxDirectMemorySize= command line flag
394 // to the sun.nio.MaxDirectMemorySize property.
395 // Do this after setting user properties to prevent people
396 // from setting the value with a -D option, as requested.
397 // Leave empty if not supplied
398 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
399 char as_chars[256];
400 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
401 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
402 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
403 result_h->obj_at_put(ndx * 2, key_str());
404 result_h->obj_at_put(ndx * 2 + 1, value_str());
405 ndx++;
406 }
407
408 // JVM monitoring and management support
409 // Add the sun.management.compiler property for the compiler's name
410 {
411 #undef CSIZE
412 #if defined(_LP64) || defined(_WIN64)
413 #define CSIZE "64-Bit "
414 #else
415 #define CSIZE
416 #endif // 64bit
417
418 #ifdef TIERED
419 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
420 #else
421 #if defined(COMPILER1)
422 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
423 #elif defined(COMPILER2)
424 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
425 #elif INCLUDE_JVMCI
426 #error "INCLUDE_JVMCI should imply TIERED"
427 #else
428 const char* compiler_name = "";
429 #endif // compilers
430 #endif // TIERED
431
432 if (*compiler_name != '\0' &&
433 (Arguments::mode() != Arguments::_int)) {
434 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
435 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
436 result_h->obj_at_put(ndx * 2, key_str());
437 result_h->obj_at_put(ndx * 2 + 1, value_str());
438 ndx++;
439 }
440 }
441
442 return (jobjectArray) JNIHandles::make_local(env, result_h());
443 JVM_END
444
445
446 /*
447 * Return the temporary directory that the VM uses for the attach
448 * and perf data files.
449 *
450 * It is important that this directory is well-known and the
451 * same for all VM instances. It cannot be affected by configuration
452 * variables such as java.io.tmpdir.
453 */
454 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
455 JVMWrapper("JVM_GetTemporaryDirectory");
456 HandleMark hm(THREAD);
457 const char* temp_dir = os::get_temp_directory();
458 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
459 return (jstring) JNIHandles::make_local(env, h());
460 JVM_END
461
462
463 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
464
465 extern volatile jint vm_created;
466
467 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
468 JVMWrapper("JVM_BeforeHalt");
469 EventShutdown event;
470 if (event.should_commit()) {
471 event.set_reason("Shutdown requested from Java");
472 event.commit();
473 }
474 JVM_END
475
476
477 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
478 before_exit(thread);
479 vm_exit(code);
480 JVM_END
481
482
483 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
484 JVMWrapper("JVM_GC");
485 if (!DisableExplicitGC) {
486 Universe::heap()->collect(GCCause::_java_lang_system_gc);
487 }
488 JVM_END
489
490
491 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
492 JVMWrapper("JVM_MaxObjectInspectionAge");
493 return Universe::heap()->millis_since_last_gc();
494 JVM_END
495
496
497 static inline jlong convert_size_t_to_jlong(size_t val) {
498 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
499 NOT_LP64 (return (jlong)val;)
500 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
501 }
502
503 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
504 JVMWrapper("JVM_TotalMemory");
505 size_t n = Universe::heap()->capacity();
506 return convert_size_t_to_jlong(n);
507 JVM_END
508
509
510 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
511 JVMWrapper("JVM_FreeMemory");
512 CollectedHeap* ch = Universe::heap();
513 size_t n;
514 {
515 MutexLocker x(Heap_lock);
516 n = ch->capacity() - ch->used();
517 }
518 return convert_size_t_to_jlong(n);
519 JVM_END
520
521
522 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
523 JVMWrapper("JVM_MaxMemory");
524 size_t n = Universe::heap()->max_capacity();
525 return convert_size_t_to_jlong(n);
526 JVM_END
527
528
529 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
530 JVMWrapper("JVM_ActiveProcessorCount");
531 return os::active_processor_count();
532 JVM_END
533
534
535
536 // java.lang.Throwable //////////////////////////////////////////////////////
537
538
539 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
540 JVMWrapper("JVM_FillInStackTrace");
541 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
542 java_lang_Throwable::fill_in_stack_trace(exception);
543 JVM_END
544
545
546 // java.lang.StackTraceElement //////////////////////////////////////////////
547
548
549 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
550 JVMWrapper("JVM_InitStackTraceElementArray");
551 Handle exception(THREAD, JNIHandles::resolve(throwable));
552 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
553 objArrayHandle stack_trace(THREAD, st);
554 // Fill in the allocated stack trace
555 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
556 JVM_END
557
558
559 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
560 JVMWrapper("JVM_InitStackTraceElement");
561 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
562 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
563 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
564 JVM_END
565
566
567 // java.lang.StackWalker //////////////////////////////////////////////////////
568
569
570 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
571 jint skip_frames, jint frame_count, jint start_index,
572 jobjectArray frames))
573 JVMWrapper("JVM_CallStackWalk");
574 JavaThread* jt = (JavaThread*) THREAD;
575 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
576 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
577 }
578
579 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
580
581 // frames array is a Class<?>[] array when only getting caller reference,
582 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
583 // be null.
584 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
585 objArrayHandle frames_array_h(THREAD, fa);
586
587 int limit = start_index + frame_count;
588 if (frames_array_h->length() < limit) {
589 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
590 }
591
592 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
593 start_index, frames_array_h, CHECK_NULL);
594 return JNIHandles::make_local(env, result);
595 JVM_END
596
597
598 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
599 jint frame_count, jint start_index,
600 jobjectArray frames))
601 JVMWrapper("JVM_MoreStackWalk");
602 JavaThread* jt = (JavaThread*) THREAD;
603
604 // frames array is a Class<?>[] array when only getting caller reference,
605 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
606 // be null.
607 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
608 objArrayHandle frames_array_h(THREAD, fa);
609
610 int limit = start_index+frame_count;
611 if (frames_array_h->length() < limit) {
612 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
613 }
614
615 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
616 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
617 start_index, frames_array_h, THREAD);
618 JVM_END
619
620 // java.lang.Object ///////////////////////////////////////////////
621
622
623 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
624 JVMWrapper("JVM_IHashCode");
625 // as implemented in the classic virtual machine; return 0 if object is NULL
626 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
627 JVM_END
628
629
630 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
631 JVMWrapper("JVM_MonitorWait");
632 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
633 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
634 if (JvmtiExport::should_post_monitor_wait()) {
635 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
636
637 // The current thread already owns the monitor and it has not yet
638 // been added to the wait queue so the current thread cannot be
639 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
640 // event handler cannot accidentally consume an unpark() meant for
641 // the ParkEvent associated with this ObjectMonitor.
642 }
643 ObjectSynchronizer::wait(obj, ms, CHECK);
644 JVM_END
645
646
647 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
648 JVMWrapper("JVM_MonitorNotify");
649 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
650 ObjectSynchronizer::notify(obj, CHECK);
651 JVM_END
652
653
654 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
655 JVMWrapper("JVM_MonitorNotifyAll");
656 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
657 ObjectSynchronizer::notifyall(obj, CHECK);
658 JVM_END
659
660
661 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
662 JVMWrapper("JVM_Clone");
663 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
664 Klass* klass = obj->klass();
665 JvmtiVMObjectAllocEventCollector oam;
666
667 #ifdef ASSERT
668 // Just checking that the cloneable flag is set correct
669 if (obj->is_array()) {
670 guarantee(klass->is_cloneable(), "all arrays are cloneable");
671 } else {
672 guarantee(obj->is_instance(), "should be instanceOop");
673 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
674 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
675 }
676 #endif
677
678 // Check if class of obj supports the Cloneable interface.
679 // All arrays are considered to be cloneable (See JLS 20.1.5).
680 // All j.l.r.Reference classes are considered non-cloneable.
681 if (!klass->is_cloneable() ||
682 (klass->is_instance_klass() &&
683 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
684 ResourceMark rm(THREAD);
685 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
686 }
687 assert(!EnableValhalla || !obj->klass()->is_value(), "Clone disallowed on value type");
688
689 // Make shallow object copy
690 const int size = obj->size();
691 oop new_obj_oop = NULL;
692 if (obj->is_array()) {
693 const int length = ((arrayOop)obj())->length();
694 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
695 /* do_zero */ true, CHECK_NULL);
696 } else {
697 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
698 }
699
700 HeapAccess<>::clone(obj(), new_obj_oop, size);
701
702 Handle new_obj(THREAD, new_obj_oop);
703 // Caution: this involves a java upcall, so the clone should be
704 // "gc-robust" by this stage.
705 if (klass->has_finalizer()) {
706 assert(obj->is_instance(), "should be instanceOop");
707 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
708 new_obj = Handle(THREAD, new_obj_oop);
709 }
710
711 return JNIHandles::make_local(env, new_obj());
712 JVM_END
713
714 // java.io.File ///////////////////////////////////////////////////////////////
715
716 JVM_LEAF(char*, JVM_NativePath(char* path))
717 JVMWrapper("JVM_NativePath");
718 return os::native_path(path);
719 JVM_END
720
721
722 // Misc. class handling ///////////////////////////////////////////////////////////
723
724
725 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
726 JVMWrapper("JVM_GetCallerClass");
727
728 // Getting the class of the caller frame.
729 //
730 // The call stack at this point looks something like this:
731 //
732 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
733 // [1] [ @CallerSensitive API.method ]
734 // [.] [ (skipped intermediate frames) ]
735 // [n] [ caller ]
736 vframeStream vfst(thread);
737 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
738 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
739 Method* m = vfst.method();
740 assert(m != NULL, "sanity");
741 switch (n) {
742 case 0:
743 // This must only be called from Reflection.getCallerClass
744 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
745 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
746 }
747 // fall-through
748 case 1:
749 // Frame 0 and 1 must be caller sensitive.
750 if (!m->caller_sensitive()) {
751 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
752 }
753 break;
754 default:
755 if (!m->is_ignored_by_security_stack_walk()) {
756 // We have reached the desired frame; return the holder class.
757 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
758 }
759 break;
760 }
761 }
762 return NULL;
763 JVM_END
764
765
766 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
767 JVMWrapper("JVM_FindPrimitiveClass");
768 oop mirror = NULL;
769 BasicType t = name2type(utf);
770 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY && t != T_VALUETYPE) {
771 mirror = Universe::java_mirror(t);
772 }
773 if (mirror == NULL) {
774 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
775 } else {
776 return (jclass) JNIHandles::make_local(env, mirror);
777 }
778 JVM_END
779
780
781 // Returns a class loaded by the bootstrap class loader; or null
782 // if not found. ClassNotFoundException is not thrown.
783 // FindClassFromBootLoader is exported to the launcher for windows.
784 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
785 const char* name))
786 JVMWrapper("JVM_FindClassFromBootLoader");
787
788 // Java libraries should ensure that name is never null...
789 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
790 // It's impossible to create this class; the name cannot fit
791 // into the constant pool.
792 return NULL;
793 }
794
795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
796 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
797 if (k == NULL) {
798 return NULL;
799 }
800
801 if (log_is_enabled(Debug, class, resolve)) {
802 trace_class_resolution(k);
803 }
804 return (jclass) JNIHandles::make_local(env, k->java_mirror());
805 JVM_END
806
807 // Find a class with this name in this loader, using the caller's protection domain.
808 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
809 jboolean init, jobject loader,
810 jclass caller))
811 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
812 // Java libraries should ensure that name is never null...
813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
814 // It's impossible to create this class; the name cannot fit
815 // into the constant pool.
816 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
817 }
818
819 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
820
821 oop loader_oop = JNIHandles::resolve(loader);
822 oop from_class = JNIHandles::resolve(caller);
823 oop protection_domain = NULL;
824 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
825 // NPE. Put it in another way, the bootstrap class loader has all permission and
826 // thus no checkPackageAccess equivalence in the VM class loader.
827 // The caller is also passed as NULL by the java code if there is no security
828 // manager to avoid the performance cost of getting the calling class.
829 if (from_class != NULL && loader_oop != NULL) {
830 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
831 }
832
833 Handle h_loader(THREAD, loader_oop);
834 Handle h_prot(THREAD, protection_domain);
835 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
836 h_prot, false, THREAD);
837
838 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
839 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
840 }
841 return result;
842 JVM_END
843
844 // Currently only called from the old verifier.
845 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
846 jboolean init, jclass from))
847 JVMWrapper("JVM_FindClassFromClass");
848 if (name == NULL) {
849 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
850 }
851 if ((int)strlen(name) > Symbol::max_length()) {
852 // It's impossible to create this class; the name cannot fit
853 // into the constant pool.
854 Exceptions::fthrow(THREAD_AND_LOCATION,
855 vmSymbols::java_lang_NoClassDefFoundError(),
856 "Class name exceeds maximum length of %d: %s",
857 Symbol::max_length(),
858 name);
859 return 0;
860 }
861 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
862 oop from_class_oop = JNIHandles::resolve(from);
863 Klass* from_class = (from_class_oop == NULL)
864 ? (Klass*)NULL
865 : java_lang_Class::as_Klass(from_class_oop);
866 oop class_loader = NULL;
867 oop protection_domain = NULL;
868 if (from_class != NULL) {
869 class_loader = from_class->class_loader();
870 protection_domain = from_class->protection_domain();
871 }
872 Handle h_loader(THREAD, class_loader);
873 Handle h_prot (THREAD, protection_domain);
874 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
875 h_prot, true, thread);
876
877 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
878 // this function is generally only used for class loading during verification.
879 ResourceMark rm;
880 oop from_mirror = JNIHandles::resolve_non_null(from);
881 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
882 const char * from_name = from_class->external_name();
883
884 oop mirror = JNIHandles::resolve_non_null(result);
885 Klass* to_class = java_lang_Class::as_Klass(mirror);
886 const char * to = to_class->external_name();
887 log_debug(class, resolve)("%s %s (verification)", from_name, to);
888 }
889
890 return result;
891 JVM_END
892
893 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
894 if (loader.is_null()) {
895 return;
896 }
897
898 // check whether the current caller thread holds the lock or not.
899 // If not, increment the corresponding counter
900 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
901 ObjectSynchronizer::owner_self) {
902 counter->inc();
903 }
904 }
905
906 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
907 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
908 jobject loader, const jbyte *buf,
909 jsize len, jobject pd, const char *source,
910 TRAPS) {
911 if (source == NULL) source = "__JVM_DefineClass__";
912
913 assert(THREAD->is_Java_thread(), "must be a JavaThread");
914 JavaThread* jt = (JavaThread*) THREAD;
915
916 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
917 ClassLoader::perf_define_appclass_selftime(),
918 ClassLoader::perf_define_appclasses(),
919 jt->get_thread_stat()->perf_recursion_counts_addr(),
920 jt->get_thread_stat()->perf_timers_addr(),
921 PerfClassTraceTime::DEFINE_CLASS);
922
923 if (UsePerfData) {
924 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
925 }
926
927 // Since exceptions can be thrown, class initialization can take place
928 // if name is NULL no check for class name in .class stream has to be made.
929 TempNewSymbol class_name = NULL;
930 if (name != NULL) {
931 const int str_len = (int)strlen(name);
932 if (str_len > Symbol::max_length()) {
933 // It's impossible to create this class; the name cannot fit
934 // into the constant pool.
935 Exceptions::fthrow(THREAD_AND_LOCATION,
936 vmSymbols::java_lang_NoClassDefFoundError(),
937 "Class name exceeds maximum length of %d: %s",
938 Symbol::max_length(),
939 name);
940 return 0;
941 }
942 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
943 }
944
945 ResourceMark rm(THREAD);
946 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
947 Handle class_loader (THREAD, JNIHandles::resolve(loader));
948 if (UsePerfData) {
949 is_lock_held_by_thread(class_loader,
950 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
951 THREAD);
952 }
953 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
954 Klass* k = SystemDictionary::resolve_from_stream(class_name,
955 class_loader,
956 protection_domain,
957 &st,
958 CHECK_NULL);
959
960 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
961 trace_class_resolution(k);
962 }
963
964 return (jclass) JNIHandles::make_local(env, k->java_mirror());
965 }
966
967
968 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
969 JVMWrapper("JVM_DefineClass");
970
971 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
972 JVM_END
973
974
975 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
976 JVMWrapper("JVM_DefineClassWithSource");
977
978 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
979 JVM_END
980
981 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
982 JVMWrapper("JVM_FindLoadedClass");
983 ResourceMark rm(THREAD);
984
985 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
986 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
987
988 const char* str = java_lang_String::as_utf8_string(string());
989 // Sanity check, don't expect null
990 if (str == NULL) return NULL;
991
992 const int str_len = (int)strlen(str);
993 if (str_len > Symbol::max_length()) {
994 // It's impossible to create this class; the name cannot fit
995 // into the constant pool.
996 return NULL;
997 }
998 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
999
1000 // Security Note:
1001 // The Java level wrapper will perform the necessary security check allowing
1002 // us to pass the NULL as the initiating class loader.
1003 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1004 if (UsePerfData) {
1005 is_lock_held_by_thread(h_loader,
1006 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1007 THREAD);
1008 }
1009
1010 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1011 h_loader,
1012 Handle(),
1013 CHECK_NULL);
1014 #if INCLUDE_CDS
1015 if (k == NULL) {
1016 // If the class is not already loaded, try to see if it's in the shared
1017 // archive for the current classloader (h_loader).
1018 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1019 }
1020 #endif
1021 return (k == NULL) ? NULL :
1022 (jclass) JNIHandles::make_local(env, k->java_mirror());
1023 JVM_END
1024
1025 // Module support //////////////////////////////////////////////////////////////////////////////
1026
1027 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1028 jstring location, const char* const* packages, jsize num_packages))
1029 JVMWrapper("JVM_DefineModule");
1030 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1031 JVM_END
1032
1033 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1034 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1035 Modules::set_bootloader_unnamed_module(module, CHECK);
1036 JVM_END
1037
1038 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1039 JVMWrapper("JVM_AddModuleExports");
1040 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1041 JVM_END
1042
1043 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1044 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1045 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1046 JVM_END
1047
1048 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1049 JVMWrapper("JVM_AddModuleExportsToAll");
1050 Modules::add_module_exports(from_module, package, NULL, CHECK);
1051 JVM_END
1052
1053 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1054 JVMWrapper("JVM_AddReadsModule");
1055 Modules::add_reads_module(from_module, source_module, CHECK);
1056 JVM_END
1057
1058 // Reflection support //////////////////////////////////////////////////////////////////////////////
1059
1060 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1061 assert (cls != NULL, "illegal class");
1062 JVMWrapper("JVM_InitClassName");
1063 JvmtiVMObjectAllocEventCollector oam;
1064 ResourceMark rm(THREAD);
1065 HandleMark hm(THREAD);
1066 Handle java_class(THREAD, JNIHandles::resolve(cls));
1067 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1068 return (jstring) JNIHandles::make_local(env, result);
1069 JVM_END
1070
1071
1072 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1073 JVMWrapper("JVM_GetClassInterfaces");
1074 JvmtiVMObjectAllocEventCollector oam;
1075 oop mirror = JNIHandles::resolve_non_null(cls);
1076
1077 // Special handling for primitive objects
1078 if (java_lang_Class::is_primitive(mirror)) {
1079 // Primitive objects does not have any interfaces
1080 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1081 return (jobjectArray) JNIHandles::make_local(env, r);
1082 }
1083
1084 Klass* klass = java_lang_Class::as_Klass(mirror);
1085 // Figure size of result array
1086 int size;
1087 if (klass->is_instance_klass()) {
1088 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1089 } else {
1090 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1091 size = 2;
1092 }
1093
1094 // Allocate result array
1095 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1096 objArrayHandle result (THREAD, r);
1097 // Fill in result
1098 if (klass->is_instance_klass()) {
1099 // Regular instance klass, fill in all local interfaces
1100 for (int index = 0; index < size; index++) {
1101 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1102 result->obj_at_put(index, k->java_mirror());
1103 }
1104 } else {
1105 // All arrays implement java.lang.Cloneable and java.io.Serializable
1106 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1107 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1108 }
1109 return (jobjectArray) JNIHandles::make_local(env, result());
1110 JVM_END
1111
1112
1113 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1114 JVMWrapper("JVM_IsInterface");
1115 oop mirror = JNIHandles::resolve_non_null(cls);
1116 if (java_lang_Class::is_primitive(mirror)) {
1117 return JNI_FALSE;
1118 }
1119 Klass* k = java_lang_Class::as_Klass(mirror);
1120 jboolean result = k->is_interface();
1121 assert(!result || k->is_instance_klass(),
1122 "all interfaces are instance types");
1123 // The compiler intrinsic for isInterface tests the
1124 // Klass::_access_flags bits in the same way.
1125 return result;
1126 JVM_END
1127
1128
1129 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1130 JVMWrapper("JVM_GetClassSigners");
1131 JvmtiVMObjectAllocEventCollector oam;
1132 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1133 // There are no signers for primitive types
1134 return NULL;
1135 }
1136
1137 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1138
1139 // If there are no signers set in the class, or if the class
1140 // is an array, return NULL.
1141 if (signers == NULL) return NULL;
1142
1143 // copy of the signers array
1144 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1145 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1146 for (int index = 0; index < signers->length(); index++) {
1147 signers_copy->obj_at_put(index, signers->obj_at(index));
1148 }
1149
1150 // return the copy
1151 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1152 JVM_END
1153
1154
1155 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1156 JVMWrapper("JVM_SetClassSigners");
1157 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1158 // This call is ignored for primitive types and arrays.
1159 // Signers are only set once, ClassLoader.java, and thus shouldn't
1160 // be called with an array. Only the bootstrap loader creates arrays.
1161 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1162 if (k->is_instance_klass()) {
1163 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1164 }
1165 }
1166 JVM_END
1167
1168
1169 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1170 JVMWrapper("JVM_GetProtectionDomain");
1171 if (JNIHandles::resolve(cls) == NULL) {
1172 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1173 }
1174
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1176 // Primitive types does not have a protection domain.
1177 return NULL;
1178 }
1179
1180 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1181 return (jobject) JNIHandles::make_local(env, pd);
1182 JVM_END
1183
1184
1185 // Returns the inherited_access_control_context field of the running thread.
1186 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1187 JVMWrapper("JVM_GetInheritedAccessControlContext");
1188 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1189 return JNIHandles::make_local(env, result);
1190 JVM_END
1191
1192 class RegisterArrayForGC {
1193 private:
1194 JavaThread *_thread;
1195 public:
1196 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1197 _thread = thread;
1198 _thread->register_array_for_gc(array);
1199 }
1200
1201 ~RegisterArrayForGC() {
1202 _thread->register_array_for_gc(NULL);
1203 }
1204 };
1205
1206
1207 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1208 JVMWrapper("JVM_GetStackAccessControlContext");
1209 if (!UsePrivilegedStack) return NULL;
1210
1211 ResourceMark rm(THREAD);
1212 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1213 JvmtiVMObjectAllocEventCollector oam;
1214
1215 // count the protection domains on the execution stack. We collapse
1216 // duplicate consecutive protection domains into a single one, as
1217 // well as stopping when we hit a privileged frame.
1218
1219 oop previous_protection_domain = NULL;
1220 Handle privileged_context(thread, NULL);
1221 bool is_privileged = false;
1222 oop protection_domain = NULL;
1223
1224 // Iterate through Java frames
1225 vframeStream vfst(thread);
1226 for(; !vfst.at_end(); vfst.next()) {
1227 // get method of frame
1228 Method* method = vfst.method();
1229
1230 // stop at the first privileged frame
1231 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1232 method->name() == vmSymbols::executePrivileged_name())
1233 {
1234 // this frame is privileged
1235 is_privileged = true;
1236
1237 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1238
1239 StackValueCollection* locals = priv->locals();
1240 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1241 StackValue* clr_sv = locals->at(2); // Class<?> caller
1242 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1243 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1244 privileged_context = ctx_sv->get_obj();
1245 Handle caller = clr_sv->get_obj();
1246
1247 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1248 protection_domain = caller_klass->protection_domain();
1249 } else {
1250 protection_domain = method->method_holder()->protection_domain();
1251 }
1252
1253 if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1254 local_array->push(protection_domain);
1255 previous_protection_domain = protection_domain;
1256 }
1257
1258 if (is_privileged) break;
1259 }
1260
1261
1262 // either all the domains on the stack were system domains, or
1263 // we had a privileged system domain
1264 if (local_array->is_empty()) {
1265 if (is_privileged && privileged_context.is_null()) return NULL;
1266
1267 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1268 return JNIHandles::make_local(env, result);
1269 }
1270
1271 // the resource area must be registered in case of a gc
1272 RegisterArrayForGC ragc(thread, local_array);
1273 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1274 local_array->length(), CHECK_NULL);
1275 objArrayHandle h_context(thread, context);
1276 for (int index = 0; index < local_array->length(); index++) {
1277 h_context->obj_at_put(index, local_array->at(index));
1278 }
1279
1280 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1281
1282 return JNIHandles::make_local(env, result);
1283 JVM_END
1284
1285
1286 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1287 JVMWrapper("JVM_IsArrayClass");
1288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1289 return (k != NULL) && k->is_array_klass() ? true : false;
1290 JVM_END
1291
1292
1293 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1294 JVMWrapper("JVM_IsPrimitiveClass");
1295 oop mirror = JNIHandles::resolve_non_null(cls);
1296 return (jboolean) java_lang_Class::is_primitive(mirror);
1297 JVM_END
1298
1299
1300 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1301 JVMWrapper("JVM_GetClassModifiers");
1302 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1303 // Primitive type
1304 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1305 }
1306
1307 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1308 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1309 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1310 return k->modifier_flags();
1311 JVM_END
1312
1313
1314 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1315
1316 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1317 JvmtiVMObjectAllocEventCollector oam;
1318 // ofClass is a reference to a java_lang_Class object. The mirror object
1319 // of an InstanceKlass
1320
1321 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1322 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1323 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1324 return (jobjectArray)JNIHandles::make_local(env, result);
1325 }
1326
1327 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1328 InnerClassesIterator iter(k);
1329
1330 if (iter.length() == 0) {
1331 // Neither an inner nor outer class
1332 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1333 return (jobjectArray)JNIHandles::make_local(env, result);
1334 }
1335
1336 // find inner class info
1337 constantPoolHandle cp(thread, k->constants());
1338 int length = iter.length();
1339
1340 // Allocate temp. result array
1341 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1342 objArrayHandle result (THREAD, r);
1343 int members = 0;
1344
1345 for (; !iter.done(); iter.next()) {
1346 int ioff = iter.inner_class_info_index();
1347 int ooff = iter.outer_class_info_index();
1348
1349 if (ioff != 0 && ooff != 0) {
1350 // Check to see if the name matches the class we're looking for
1351 // before attempting to find the class.
1352 if (cp->klass_name_at_matches(k, ooff)) {
1353 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1354 if (outer_klass == k) {
1355 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1356 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1357
1358 // Throws an exception if outer klass has not declared k as
1359 // an inner klass
1360 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1361
1362 result->obj_at_put(members, inner_klass->java_mirror());
1363 members++;
1364 }
1365 }
1366 }
1367 }
1368
1369 if (members != length) {
1370 // Return array of right length
1371 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1372 for(int i = 0; i < members; i++) {
1373 res->obj_at_put(i, result->obj_at(i));
1374 }
1375 return (jobjectArray)JNIHandles::make_local(env, res);
1376 }
1377
1378 return (jobjectArray)JNIHandles::make_local(env, result());
1379 JVM_END
1380
1381
1382 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1383 {
1384 // ofClass is a reference to a java_lang_Class object.
1385 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1386 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1387 return NULL;
1388 }
1389
1390 bool inner_is_member = false;
1391 Klass* outer_klass
1392 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1393 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1394 if (outer_klass == NULL) return NULL; // already a top-level class
1395 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1396 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1397 }
1398 JVM_END
1399
1400 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1401 {
1402 oop mirror = JNIHandles::resolve_non_null(cls);
1403 if (java_lang_Class::is_primitive(mirror) ||
1404 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1405 return NULL;
1406 }
1407 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1408 int ooff = 0, noff = 0;
1409 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1410 if (noff != 0) {
1411 constantPoolHandle i_cp(thread, k->constants());
1412 Symbol* name = i_cp->symbol_at(noff);
1413 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1414 return (jstring) JNIHandles::make_local(env, str());
1415 }
1416 }
1417 return NULL;
1418 }
1419 JVM_END
1420
1421 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1422 assert (cls != NULL, "illegal class");
1423 JVMWrapper("JVM_GetClassSignature");
1424 JvmtiVMObjectAllocEventCollector oam;
1425 ResourceMark rm(THREAD);
1426 // Return null for arrays and primatives
1427 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1428 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1429 if (k->is_instance_klass()) {
1430 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1431 if (sym == NULL) return NULL;
1432 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1433 return (jstring) JNIHandles::make_local(env, str());
1434 }
1435 }
1436 return NULL;
1437 JVM_END
1438
1439
1440 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1441 assert (cls != NULL, "illegal class");
1442 JVMWrapper("JVM_GetClassAnnotations");
1443
1444 // Return null for arrays and primitives
1445 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1447 if (k->is_instance_klass()) {
1448 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1449 return (jbyteArray) JNIHandles::make_local(env, a);
1450 }
1451 }
1452 return NULL;
1453 JVM_END
1454
1455
1456 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1457 // some of this code was adapted from from jni_FromReflectedField
1458
1459 oop reflected = JNIHandles::resolve_non_null(field);
1460 oop mirror = java_lang_reflect_Field::clazz(reflected);
1461 Klass* k = java_lang_Class::as_Klass(mirror);
1462 int slot = java_lang_reflect_Field::slot(reflected);
1463 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1464
1465 InstanceKlass* ik = InstanceKlass::cast(k);
1466 intptr_t offset = ik->field_offset(slot);
1467
1468 if (modifiers & JVM_ACC_STATIC) {
1469 // for static fields we only look in the current class
1470 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1471 assert(false, "cannot find static field");
1472 return false;
1473 }
1474 } else {
1475 // for instance fields we start with the current class and work
1476 // our way up through the superclass chain
1477 if (!ik->find_field_from_offset(offset, false, &fd)) {
1478 assert(false, "cannot find instance field");
1479 return false;
1480 }
1481 }
1482 return true;
1483 }
1484
1485 static Method* jvm_get_method_common(jobject method) {
1486 // some of this code was adapted from from jni_FromReflectedMethod
1487
1488 oop reflected = JNIHandles::resolve_non_null(method);
1489 oop mirror = NULL;
1490 int slot = 0;
1491
1492 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1493 mirror = java_lang_reflect_Constructor::clazz(reflected);
1494 slot = java_lang_reflect_Constructor::slot(reflected);
1495 } else {
1496 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1497 "wrong type");
1498 mirror = java_lang_reflect_Method::clazz(reflected);
1499 slot = java_lang_reflect_Method::slot(reflected);
1500 }
1501 Klass* k = java_lang_Class::as_Klass(mirror);
1502
1503 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1504 assert(m != NULL, "cannot find method");
1505 return m; // caller has to deal with NULL in product mode
1506 }
1507
1508 /* Type use annotations support (JDK 1.8) */
1509
1510 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1511 assert (cls != NULL, "illegal class");
1512 JVMWrapper("JVM_GetClassTypeAnnotations");
1513 ResourceMark rm(THREAD);
1514 // Return null for arrays and primitives
1515 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1516 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1517 if (k->is_instance_klass()) {
1518 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1519 if (type_annotations != NULL) {
1520 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1521 return (jbyteArray) JNIHandles::make_local(env, a);
1522 }
1523 }
1524 }
1525 return NULL;
1526 JVM_END
1527
1528 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1529 assert (method != NULL, "illegal method");
1530 JVMWrapper("JVM_GetMethodTypeAnnotations");
1531
1532 // method is a handle to a java.lang.reflect.Method object
1533 Method* m = jvm_get_method_common(method);
1534 if (m == NULL) {
1535 return NULL;
1536 }
1537
1538 AnnotationArray* type_annotations = m->type_annotations();
1539 if (type_annotations != NULL) {
1540 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1541 return (jbyteArray) JNIHandles::make_local(env, a);
1542 }
1543
1544 return NULL;
1545 JVM_END
1546
1547 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1548 assert (field != NULL, "illegal field");
1549 JVMWrapper("JVM_GetFieldTypeAnnotations");
1550
1551 fieldDescriptor fd;
1552 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1553 if (!gotFd) {
1554 return NULL;
1555 }
1556
1557 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1558 JVM_END
1559
1560 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1561 if (!cp->is_within_bounds(index)) {
1562 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1563 }
1564 }
1565
1566 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1567 {
1568 JVMWrapper("JVM_GetMethodParameters");
1569 // method is a handle to a java.lang.reflect.Method object
1570 Method* method_ptr = jvm_get_method_common(method);
1571 methodHandle mh (THREAD, method_ptr);
1572 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1573 const int num_params = mh->method_parameters_length();
1574
1575 if (num_params < 0) {
1576 // A -1 return value from method_parameters_length means there is no
1577 // parameter data. Return null to indicate this to the reflection
1578 // API.
1579 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1580 return (jobjectArray)NULL;
1581 } else {
1582 // Otherwise, we return something up to reflection, even if it is
1583 // a zero-length array. Why? Because in some cases this can
1584 // trigger a MalformedParametersException.
1585
1586 // make sure all the symbols are properly formatted
1587 for (int i = 0; i < num_params; i++) {
1588 MethodParametersElement* params = mh->method_parameters_start();
1589 int index = params[i].name_cp_index;
1590 bounds_check(mh->constants(), index, CHECK_NULL);
1591
1592 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1593 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1594 "Wrong type at constant pool index");
1595 }
1596
1597 }
1598
1599 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1600 objArrayHandle result (THREAD, result_oop);
1601
1602 for (int i = 0; i < num_params; i++) {
1603 MethodParametersElement* params = mh->method_parameters_start();
1604 // For a 0 index, give a NULL symbol
1605 Symbol* sym = 0 != params[i].name_cp_index ?
1606 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1607 int flags = params[i].flags;
1608 oop param = Reflection::new_parameter(reflected_method, i, sym,
1609 flags, CHECK_NULL);
1610 result->obj_at_put(i, param);
1611 }
1612 return (jobjectArray)JNIHandles::make_local(env, result());
1613 }
1614 }
1615 JVM_END
1616
1617 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1618
1619 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1620 {
1621 JVMWrapper("JVM_GetClassDeclaredFields");
1622 JvmtiVMObjectAllocEventCollector oam;
1623
1624 // Exclude primitive types and array types
1625 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1626 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1627 // Return empty array
1628 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1629 return (jobjectArray) JNIHandles::make_local(env, res);
1630 }
1631
1632 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1633 constantPoolHandle cp(THREAD, k->constants());
1634
1635 // Ensure class is linked
1636 k->link_class(CHECK_NULL);
1637
1638 // Allocate result
1639 int num_fields;
1640
1641 if (publicOnly) {
1642 num_fields = 0;
1643 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1644 if (fs.access_flags().is_public()) ++num_fields;
1645 }
1646 } else {
1647 num_fields = k->java_fields_count();
1648 }
1649
1650 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1651 objArrayHandle result (THREAD, r);
1652
1653 int out_idx = 0;
1654 fieldDescriptor fd;
1655 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1656 if (!publicOnly || fs.access_flags().is_public()) {
1657 fd.reinitialize(k, fs.index());
1658 oop field = Reflection::new_field(&fd, CHECK_NULL);
1659 result->obj_at_put(out_idx, field);
1660 ++out_idx;
1661 }
1662 }
1663 assert(out_idx == num_fields, "just checking");
1664 return (jobjectArray) JNIHandles::make_local(env, result());
1665 }
1666 JVM_END
1667
1668 static bool select_method(const methodHandle& method, bool want_constructor) {
1669 if (want_constructor) {
1670 return (method->is_initializer() && !method->is_static());
1671 } else {
1672 return (!method->is_initializer() && !method->is_overpass());
1673 }
1674 }
1675
1676 static jobjectArray get_class_declared_methods_helper(
1677 JNIEnv *env,
1678 jclass ofClass, jboolean publicOnly,
1679 bool want_constructor,
1680 Klass* klass, TRAPS) {
1681
1682 JvmtiVMObjectAllocEventCollector oam;
1683
1684 // Exclude primitive types and array types
1685 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1686 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1687 // Return empty array
1688 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1689 return (jobjectArray) JNIHandles::make_local(env, res);
1690 }
1691
1692 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1693
1694 // Ensure class is linked
1695 k->link_class(CHECK_NULL);
1696
1697 Array<Method*>* methods = k->methods();
1698 int methods_length = methods->length();
1699
1700 // Save original method_idnum in case of redefinition, which can change
1701 // the idnum of obsolete methods. The new method will have the same idnum
1702 // but if we refresh the methods array, the counts will be wrong.
1703 ResourceMark rm(THREAD);
1704 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1705 int num_methods = 0;
1706
1707 for (int i = 0; i < methods_length; i++) {
1708 methodHandle method(THREAD, methods->at(i));
1709 if (select_method(method, want_constructor)) {
1710 if (!publicOnly || method->is_public()) {
1711 idnums->push(method->method_idnum());
1712 ++num_methods;
1713 }
1714 }
1715 }
1716
1717 // Allocate result
1718 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1719 objArrayHandle result (THREAD, r);
1720
1721 // Now just put the methods that we selected above, but go by their idnum
1722 // in case of redefinition. The methods can be redefined at any safepoint,
1723 // so above when allocating the oop array and below when creating reflect
1724 // objects.
1725 for (int i = 0; i < num_methods; i++) {
1726 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1727 if (method.is_null()) {
1728 // Method may have been deleted and seems this API can handle null
1729 // Otherwise should probably put a method that throws NSME
1730 result->obj_at_put(i, NULL);
1731 } else {
1732 oop m;
1733 if (want_constructor) {
1734 m = Reflection::new_constructor(method, CHECK_NULL);
1735 } else {
1736 m = Reflection::new_method(method, false, CHECK_NULL);
1737 }
1738 result->obj_at_put(i, m);
1739 }
1740 }
1741
1742 return (jobjectArray) JNIHandles::make_local(env, result());
1743 }
1744
1745 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1746 {
1747 JVMWrapper("JVM_GetClassDeclaredMethods");
1748 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1749 /*want_constructor*/ false,
1750 SystemDictionary::reflect_Method_klass(), THREAD);
1751 }
1752 JVM_END
1753
1754 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1755 {
1756 JVMWrapper("JVM_GetClassDeclaredConstructors");
1757 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1758 /*want_constructor*/ true,
1759 SystemDictionary::reflect_Constructor_klass(), THREAD);
1760 }
1761 JVM_END
1762
1763 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1764 {
1765 JVMWrapper("JVM_GetClassAccessFlags");
1766 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1767 // Primitive type
1768 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1769 }
1770
1771 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1772 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1773 }
1774 JVM_END
1775
1776 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1777 {
1778 JVMWrapper("JVM_AreNestMates");
1779 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1780 assert(c->is_instance_klass(), "must be");
1781 InstanceKlass* ck = InstanceKlass::cast(c);
1782 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1783 assert(m->is_instance_klass(), "must be");
1784 InstanceKlass* mk = InstanceKlass::cast(m);
1785 return ck->has_nestmate_access_to(mk, THREAD);
1786 }
1787 JVM_END
1788
1789 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1790 {
1791 // current is not a primitive or array class
1792 JVMWrapper("JVM_GetNestHost");
1793 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1794 assert(c->is_instance_klass(), "must be");
1795 InstanceKlass* ck = InstanceKlass::cast(c);
1796 // Don't post exceptions if validation fails
1797 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1798 return (jclass) (host == NULL ? NULL :
1799 JNIHandles::make_local(THREAD, host->java_mirror()));
1800 }
1801 JVM_END
1802
1803 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1804 {
1805 // current is not a primitive or array class
1806 JVMWrapper("JVM_GetNestMembers");
1807 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1808 assert(c->is_instance_klass(), "must be");
1809 InstanceKlass* ck = InstanceKlass::cast(c);
1810 // Get the nest host for this nest - throw ICCE if validation fails
1811 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1812 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1813
1814 {
1815 JvmtiVMObjectAllocEventCollector oam;
1816 Array<u2>* members = host->nest_members();
1817 int length = members == NULL ? 0 : members->length();
1818 // nest host is first in the array so make it one bigger
1819 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1820 length + 1, CHECK_NULL);
1821 objArrayHandle result (THREAD, r);
1822 result->obj_at_put(0, host->java_mirror());
1823 if (length != 0) {
1824 int i;
1825 for (i = 0; i < length; i++) {
1826 int cp_index = members->at(i);
1827 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1828 if (k->is_instance_klass()) {
1829 InstanceKlass* nest_host_k =
1830 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1831 if (nest_host_k == host) {
1832 result->obj_at_put(i+1, k->java_mirror());
1833 }
1834 else {
1835 // k's nest host is legal but it isn't our host so
1836 // throw ICCE
1837 ResourceMark rm(THREAD);
1838 Exceptions::fthrow(THREAD_AND_LOCATION,
1839 icce,
1840 "Nest member %s in %s declares a different nest host of %s",
1841 k->external_name(),
1842 host->external_name(),
1843 nest_host_k->external_name()
1844 );
1845 return NULL;
1846 }
1847 }
1848 else {
1849 // we have a bad nest member entry - throw ICCE
1850 ResourceMark rm(THREAD);
1851 Exceptions::fthrow(THREAD_AND_LOCATION,
1852 icce,
1853 "Class %s can not be a nest member of %s",
1854 k->external_name(),
1855 host->external_name()
1856 );
1857 return NULL;
1858 }
1859 }
1860 }
1861 else {
1862 assert(host == ck, "must be singleton nest");
1863 }
1864 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1865 }
1866 }
1867 JVM_END
1868
1869 // Constant pool access //////////////////////////////////////////////////////////
1870
1871 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1872 {
1873 JVMWrapper("JVM_GetClassConstantPool");
1874 JvmtiVMObjectAllocEventCollector oam;
1875
1876 // Return null for primitives and arrays
1877 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1878 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1879 if (k->is_instance_klass()) {
1880 InstanceKlass* k_h = InstanceKlass::cast(k);
1881 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1882 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1883 return JNIHandles::make_local(jcp());
1884 }
1885 }
1886 return NULL;
1887 }
1888 JVM_END
1889
1890
1891 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1892 {
1893 JVMWrapper("JVM_ConstantPoolGetSize");
1894 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1895 return cp->length();
1896 }
1897 JVM_END
1898
1899
1900 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1901 {
1902 JVMWrapper("JVM_ConstantPoolGetClassAt");
1903 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1904 bounds_check(cp, index, CHECK_NULL);
1905 constantTag tag = cp->tag_at(index);
1906 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1907 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1908 }
1909 Klass* k = cp->klass_at(index, CHECK_NULL);
1910 return (jclass) JNIHandles::make_local(k->java_mirror());
1911 }
1912 JVM_END
1913
1914 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1915 {
1916 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1917 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1918 bounds_check(cp, index, CHECK_NULL);
1919 constantTag tag = cp->tag_at(index);
1920 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1921 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1922 }
1923 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1924 if (k == NULL) return NULL;
1925 return (jclass) JNIHandles::make_local(k->java_mirror());
1926 }
1927 JVM_END
1928
1929 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1930 constantTag tag = cp->tag_at(index);
1931 if (!tag.is_method() && !tag.is_interface_method()) {
1932 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1933 }
1934 int klass_ref = cp->uncached_klass_ref_index_at(index);
1935 Klass* k_o;
1936 if (force_resolution) {
1937 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1938 } else {
1939 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1940 if (k_o == NULL) return NULL;
1941 }
1942 InstanceKlass* k = InstanceKlass::cast(k_o);
1943 Symbol* name = cp->uncached_name_ref_at(index);
1944 Symbol* sig = cp->uncached_signature_ref_at(index);
1945 methodHandle m (THREAD, k->find_method(name, sig));
1946 if (m.is_null()) {
1947 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1948 }
1949 oop method;
1950 if (!m->is_initializer() || m->is_static()) {
1951 method = Reflection::new_method(m, true, CHECK_NULL);
1952 } else {
1953 method = Reflection::new_constructor(m, CHECK_NULL);
1954 }
1955 return JNIHandles::make_local(method);
1956 }
1957
1958 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1959 {
1960 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1961 JvmtiVMObjectAllocEventCollector oam;
1962 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1963 bounds_check(cp, index, CHECK_NULL);
1964 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1965 return res;
1966 }
1967 JVM_END
1968
1969 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1970 {
1971 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1972 JvmtiVMObjectAllocEventCollector oam;
1973 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1974 bounds_check(cp, index, CHECK_NULL);
1975 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1976 return res;
1977 }
1978 JVM_END
1979
1980 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1981 constantTag tag = cp->tag_at(index);
1982 if (!tag.is_field()) {
1983 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1984 }
1985 int klass_ref = cp->uncached_klass_ref_index_at(index);
1986 Klass* k_o;
1987 if (force_resolution) {
1988 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1989 } else {
1990 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1991 if (k_o == NULL) return NULL;
1992 }
1993 InstanceKlass* k = InstanceKlass::cast(k_o);
1994 Symbol* name = cp->uncached_name_ref_at(index);
1995 Symbol* sig = cp->uncached_signature_ref_at(index);
1996 fieldDescriptor fd;
1997 Klass* target_klass = k->find_field(name, sig, &fd);
1998 if (target_klass == NULL) {
1999 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2000 }
2001 oop field = Reflection::new_field(&fd, CHECK_NULL);
2002 return JNIHandles::make_local(field);
2003 }
2004
2005 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2006 {
2007 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2008 JvmtiVMObjectAllocEventCollector oam;
2009 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2010 bounds_check(cp, index, CHECK_NULL);
2011 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2012 return res;
2013 }
2014 JVM_END
2015
2016 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2017 {
2018 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2019 JvmtiVMObjectAllocEventCollector oam;
2020 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2021 bounds_check(cp, index, CHECK_NULL);
2022 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2023 return res;
2024 }
2025 JVM_END
2026
2027 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2028 {
2029 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2030 JvmtiVMObjectAllocEventCollector oam;
2031 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2032 bounds_check(cp, index, CHECK_NULL);
2033 constantTag tag = cp->tag_at(index);
2034 if (!tag.is_field_or_method()) {
2035 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2036 }
2037 int klass_ref = cp->uncached_klass_ref_index_at(index);
2038 Symbol* klass_name = cp->klass_name_at(klass_ref);
2039 Symbol* member_name = cp->uncached_name_ref_at(index);
2040 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2041 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2042 objArrayHandle dest(THREAD, dest_o);
2043 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2044 dest->obj_at_put(0, str());
2045 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2046 dest->obj_at_put(1, str());
2047 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2048 dest->obj_at_put(2, str());
2049 return (jobjectArray) JNIHandles::make_local(dest());
2050 }
2051 JVM_END
2052
2053 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2054 {
2055 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2056 JvmtiVMObjectAllocEventCollector oam;
2057 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058 bounds_check(cp, index, CHECK_0);
2059 constantTag tag = cp->tag_at(index);
2060 if (!tag.is_field_or_method()) {
2061 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2062 }
2063 return (jint) cp->uncached_klass_ref_index_at(index);
2064 }
2065 JVM_END
2066
2067 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2068 {
2069 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2070 JvmtiVMObjectAllocEventCollector oam;
2071 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072 bounds_check(cp, index, CHECK_0);
2073 constantTag tag = cp->tag_at(index);
2074 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2075 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2076 }
2077 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2078 }
2079 JVM_END
2080
2081 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2082 {
2083 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2084 JvmtiVMObjectAllocEventCollector oam;
2085 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2086 bounds_check(cp, index, CHECK_NULL);
2087 constantTag tag = cp->tag_at(index);
2088 if (!tag.is_name_and_type()) {
2089 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2090 }
2091 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2092 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2093 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2094 objArrayHandle dest(THREAD, dest_o);
2095 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2096 dest->obj_at_put(0, str());
2097 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2098 dest->obj_at_put(1, str());
2099 return (jobjectArray) JNIHandles::make_local(dest());
2100 }
2101 JVM_END
2102
2103 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2104 {
2105 JVMWrapper("JVM_ConstantPoolGetIntAt");
2106 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2107 bounds_check(cp, index, CHECK_0);
2108 constantTag tag = cp->tag_at(index);
2109 if (!tag.is_int()) {
2110 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2111 }
2112 return cp->int_at(index);
2113 }
2114 JVM_END
2115
2116 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2117 {
2118 JVMWrapper("JVM_ConstantPoolGetLongAt");
2119 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120 bounds_check(cp, index, CHECK_(0L));
2121 constantTag tag = cp->tag_at(index);
2122 if (!tag.is_long()) {
2123 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2124 }
2125 return cp->long_at(index);
2126 }
2127 JVM_END
2128
2129 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2130 {
2131 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2132 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2133 bounds_check(cp, index, CHECK_(0.0f));
2134 constantTag tag = cp->tag_at(index);
2135 if (!tag.is_float()) {
2136 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2137 }
2138 return cp->float_at(index);
2139 }
2140 JVM_END
2141
2142 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2143 {
2144 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2145 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2146 bounds_check(cp, index, CHECK_(0.0));
2147 constantTag tag = cp->tag_at(index);
2148 if (!tag.is_double()) {
2149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2150 }
2151 return cp->double_at(index);
2152 }
2153 JVM_END
2154
2155 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2156 {
2157 JVMWrapper("JVM_ConstantPoolGetStringAt");
2158 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2159 bounds_check(cp, index, CHECK_NULL);
2160 constantTag tag = cp->tag_at(index);
2161 if (!tag.is_string()) {
2162 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2163 }
2164 oop str = cp->string_at(index, CHECK_NULL);
2165 return (jstring) JNIHandles::make_local(str);
2166 }
2167 JVM_END
2168
2169 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2170 {
2171 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2172 JvmtiVMObjectAllocEventCollector oam;
2173 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2174 bounds_check(cp, index, CHECK_NULL);
2175 constantTag tag = cp->tag_at(index);
2176 if (!tag.is_symbol()) {
2177 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2178 }
2179 Symbol* sym = cp->symbol_at(index);
2180 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2181 return (jstring) JNIHandles::make_local(str());
2182 }
2183 JVM_END
2184
2185 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2186 {
2187 JVMWrapper("JVM_ConstantPoolGetTagAt");
2188 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2189 bounds_check(cp, index, CHECK_0);
2190 constantTag tag = cp->tag_at(index);
2191 jbyte result = tag.value();
2192 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2193 // they are changed to the corresponding tags from the JVM spec, so that java code in
2194 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2195 if (tag.is_klass_or_reference()) {
2196 result = JVM_CONSTANT_Class;
2197 } else if (tag.is_string_index()) {
2198 result = JVM_CONSTANT_String;
2199 } else if (tag.is_method_type_in_error()) {
2200 result = JVM_CONSTANT_MethodType;
2201 } else if (tag.is_method_handle_in_error()) {
2202 result = JVM_CONSTANT_MethodHandle;
2203 } else if (tag.is_dynamic_constant_in_error()) {
2204 result = JVM_CONSTANT_Dynamic;
2205 }
2206 return result;
2207 }
2208 JVM_END
2209
2210 // Assertion support. //////////////////////////////////////////////////////////
2211
2212 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2213 JVMWrapper("JVM_DesiredAssertionStatus");
2214 assert(cls != NULL, "bad class");
2215
2216 oop r = JNIHandles::resolve(cls);
2217 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2218 if (java_lang_Class::is_primitive(r)) return false;
2219
2220 Klass* k = java_lang_Class::as_Klass(r);
2221 assert(k->is_instance_klass(), "must be an instance klass");
2222 if (!k->is_instance_klass()) return false;
2223
2224 ResourceMark rm(THREAD);
2225 const char* name = k->name()->as_C_string();
2226 bool system_class = k->class_loader() == NULL;
2227 return JavaAssertions::enabled(name, system_class);
2228
2229 JVM_END
2230
2231
2232 // Return a new AssertionStatusDirectives object with the fields filled in with
2233 // command-line assertion arguments (i.e., -ea, -da).
2234 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2235 JVMWrapper("JVM_AssertionStatusDirectives");
2236 JvmtiVMObjectAllocEventCollector oam;
2237 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2238 return JNIHandles::make_local(env, asd);
2239 JVM_END
2240
2241 // Arrays support /////////////////////////////////////////////////////////////
2242
2243 JVM_ENTRY(jboolean, JVM_ArrayIsAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2244 JVMWrapper("JVM_ArrayIsAccessAtomic");
2245 oop o = JNIHandles::resolve(array);
2246 Klass* k = o->klass();
2247 if ((o == NULL) || (!k->is_array_klass())) {
2248 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2249 }
2250 if (k->is_valueArray_klass()) {
2251 return ValueArrayKlass::cast(k)->is_atomic();
2252 }
2253 return true;
2254 JVM_END
2255
2256 JVM_ENTRY(jobject, JVM_ArrayEnsureAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2257 JVMWrapper("JVM_ArrayEnsureAccessAtomic");
2258 oop o = JNIHandles::resolve(array);
2259 Klass* k = o->klass();
2260 if ((o == NULL) || (!k->is_array_klass())) {
2261 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2262 }
2263 if (k->is_valueArray_klass()) {
2264 ValueArrayKlass* vk = ValueArrayKlass::cast(k);
2265 if (!vk->is_atomic()) {
2266 /**
2267 * Need to decide how to implement:
2268 *
2269 * 1) Change to objArrayOop layout, therefore oop->klass() differs so
2270 * then "<atomic>[Qfoo;" klass needs to subclass "[Qfoo;" to pass through
2271 * "checkcast" & "instanceof"
2272 *
2273 * 2) Use extra header in the valueArrayOop to flag atomicity required and
2274 * possibly per instance lock structure. Said info, could be placed in
2275 * "trailer" rather than disturb the current arrayOop
2276 */
2277 Unimplemented();
2278 }
2279 }
2280 return array;
2281 JVM_END
2282
2283 // Verification ////////////////////////////////////////////////////////////////////////////////
2284
2285 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2286
2287 // RedefineClasses support: bug 6214132 caused verification to fail.
2288 // All functions from this section should call the jvmtiThreadSate function:
2289 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2290 // The function returns a Klass* of the _scratch_class if the verifier
2291 // was invoked in the middle of the class redefinition.
2292 // Otherwise it returns its argument value which is the _the_class Klass*.
2293 // Please, refer to the description in the jvmtiThreadSate.hpp.
2294
2295 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2296 JVMWrapper("JVM_GetClassNameUTF");
2297 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2298 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2299 return k->name()->as_utf8();
2300 JVM_END
2301
2302
2303 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2304 JVMWrapper("JVM_GetClassCPTypes");
2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 // types will have length zero if this is not an InstanceKlass
2308 // (length is determined by call to JVM_GetClassCPEntriesCount)
2309 if (k->is_instance_klass()) {
2310 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2311 for (int index = cp->length() - 1; index >= 0; index--) {
2312 constantTag tag = cp->tag_at(index);
2313 types[index] = tag.is_unresolved_klass() ? JVM_CONSTANT_Class : tag.value();
2314 }
2315 }
2316 JVM_END
2317
2318
2319 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2320 JVMWrapper("JVM_GetClassCPEntriesCount");
2321 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2324 JVM_END
2325
2326
2327 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2328 JVMWrapper("JVM_GetClassFieldsCount");
2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2332 JVM_END
2333
2334
2335 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2336 JVMWrapper("JVM_GetClassMethodsCount");
2337 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2338 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2340 JVM_END
2341
2342
2343 // The following methods, used for the verifier, are never called with
2344 // array klasses, so a direct cast to InstanceKlass is safe.
2345 // Typically, these methods are called in a loop with bounds determined
2346 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2347 // zero for arrays.
2348 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2349 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2353 int length = method->checked_exceptions_length();
2354 if (length > 0) {
2355 CheckedExceptionElement* table= method->checked_exceptions_start();
2356 for (int i = 0; i < length; i++) {
2357 exceptions[i] = table[i].class_cp_index;
2358 }
2359 }
2360 JVM_END
2361
2362
2363 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2364 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2365 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2368 return method->checked_exceptions_length();
2369 JVM_END
2370
2371
2372 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2373 JVMWrapper("JVM_GetMethodIxByteCode");
2374 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2375 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2376 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2377 memcpy(code, method->code_base(), method->code_size());
2378 JVM_END
2379
2380
2381 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2382 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2383 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2384 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2385 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2386 return method->code_size();
2387 JVM_END
2388
2389
2390 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2391 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2393 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2394 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2395 ExceptionTable extable(method);
2396 entry->start_pc = extable.start_pc(entry_index);
2397 entry->end_pc = extable.end_pc(entry_index);
2398 entry->handler_pc = extable.handler_pc(entry_index);
2399 entry->catchType = extable.catch_type_index(entry_index);
2400 JVM_END
2401
2402
2403 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2404 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2405 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2408 return method->exception_table_length();
2409 JVM_END
2410
2411
2412 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2413 JVMWrapper("JVM_GetMethodIxModifiers");
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2418 JVM_END
2419
2420
2421 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2422 JVMWrapper("JVM_GetFieldIxModifiers");
2423 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2424 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2425 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2426 JVM_END
2427
2428
2429 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2430 JVMWrapper("JVM_GetMethodIxLocalsCount");
2431 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2432 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2433 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2434 return method->max_locals();
2435 JVM_END
2436
2437
2438 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2439 JVMWrapper("JVM_GetMethodIxArgsSize");
2440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2443 return method->size_of_parameters();
2444 JVM_END
2445
2446
2447 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2448 JVMWrapper("JVM_GetMethodIxMaxStack");
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->verifier_max_stack();
2453 JVM_END
2454
2455
2456 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2457 JVMWrapper("JVM_IsConstructorIx");
2458 ResourceMark rm(THREAD);
2459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2462 return method->name() == vmSymbols::object_initializer_name();
2463 JVM_END
2464
2465
2466 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2467 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2468 ResourceMark rm(THREAD);
2469 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2470 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2471 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2472 return method->is_overpass();
2473 JVM_END
2474
2475 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2476 JVMWrapper("JVM_GetMethodIxIxUTF");
2477 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2478 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2479 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2480 return method->name()->as_utf8();
2481 JVM_END
2482
2483
2484 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2485 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2486 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2487 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2488 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2489 return method->signature()->as_utf8();
2490 JVM_END
2491
2492 /**
2493 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2494 * read entries in the constant pool. Since the old verifier always
2495 * works on a copy of the code, it will not see any rewriting that
2496 * may possibly occur in the middle of verification. So it is important
2497 * that nothing it calls tries to use the cpCache instead of the raw
2498 * constant pool, so we must use cp->uncached_x methods when appropriate.
2499 */
2500 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2501 JVMWrapper("JVM_GetCPFieldNameUTF");
2502 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2503 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2504 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2505 switch (cp->tag_at(cp_index).value()) {
2506 case JVM_CONSTANT_Fieldref:
2507 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2508 default:
2509 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2510 }
2511 ShouldNotReachHere();
2512 return NULL;
2513 JVM_END
2514
2515
2516 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2517 JVMWrapper("JVM_GetCPMethodNameUTF");
2518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2519 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2520 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2521 switch (cp->tag_at(cp_index).value()) {
2522 case JVM_CONSTANT_InterfaceMethodref:
2523 case JVM_CONSTANT_Methodref:
2524 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2525 default:
2526 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2527 }
2528 ShouldNotReachHere();
2529 return NULL;
2530 JVM_END
2531
2532
2533 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2534 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2535 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2536 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2537 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2538 switch (cp->tag_at(cp_index).value()) {
2539 case JVM_CONSTANT_InterfaceMethodref:
2540 case JVM_CONSTANT_Methodref:
2541 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2542 default:
2543 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2544 }
2545 ShouldNotReachHere();
2546 return NULL;
2547 JVM_END
2548
2549
2550 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2551 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2553 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2554 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2555 switch (cp->tag_at(cp_index).value()) {
2556 case JVM_CONSTANT_Fieldref:
2557 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2558 default:
2559 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2560 }
2561 ShouldNotReachHere();
2562 return NULL;
2563 JVM_END
2564
2565
2566 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2567 JVMWrapper("JVM_GetCPClassNameUTF");
2568 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2569 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2570 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2571 Symbol* classname = cp->klass_name_at(cp_index);
2572 return classname->as_utf8();
2573 JVM_END
2574
2575
2576 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2577 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2581 switch (cp->tag_at(cp_index).value()) {
2582 case JVM_CONSTANT_Fieldref: {
2583 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2584 Symbol* classname = cp->klass_name_at(class_index);
2585 return classname->as_utf8();
2586 }
2587 default:
2588 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2589 }
2590 ShouldNotReachHere();
2591 return NULL;
2592 JVM_END
2593
2594
2595 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2596 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2597 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2598 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2599 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2600 switch (cp->tag_at(cp_index).value()) {
2601 case JVM_CONSTANT_Methodref:
2602 case JVM_CONSTANT_InterfaceMethodref: {
2603 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2604 Symbol* classname = cp->klass_name_at(class_index);
2605 return classname->as_utf8();
2606 }
2607 default:
2608 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2609 }
2610 ShouldNotReachHere();
2611 return NULL;
2612 JVM_END
2613
2614
2615 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2616 JVMWrapper("JVM_GetCPFieldModifiers");
2617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2618 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2620 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2621 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2622 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2623 switch (cp->tag_at(cp_index).value()) {
2624 case JVM_CONSTANT_Fieldref: {
2625 Symbol* name = cp->uncached_name_ref_at(cp_index);
2626 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2627 InstanceKlass* ik = InstanceKlass::cast(k_called);
2628 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2629 if (fs.name() == name && fs.signature() == signature) {
2630 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2631 }
2632 }
2633 return -1;
2634 }
2635 default:
2636 fatal("JVM_GetCPFieldModifiers: illegal constant");
2637 }
2638 ShouldNotReachHere();
2639 return 0;
2640 JVM_END
2641
2642
2643 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2644 JVMWrapper("JVM_GetCPMethodModifiers");
2645 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2646 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2647 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2648 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2649 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2650 switch (cp->tag_at(cp_index).value()) {
2651 case JVM_CONSTANT_Methodref:
2652 case JVM_CONSTANT_InterfaceMethodref: {
2653 Symbol* name = cp->uncached_name_ref_at(cp_index);
2654 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2655 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2656 int methods_count = methods->length();
2657 for (int i = 0; i < methods_count; i++) {
2658 Method* method = methods->at(i);
2659 if (method->name() == name && method->signature() == signature) {
2660 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2661 }
2662 }
2663 return -1;
2664 }
2665 default:
2666 fatal("JVM_GetCPMethodModifiers: illegal constant");
2667 }
2668 ShouldNotReachHere();
2669 return 0;
2670 JVM_END
2671
2672
2673 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2674
2675 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2676 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2677 JVM_END
2678
2679
2680 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2681 JVMWrapper("JVM_IsSameClassPackage");
2682 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2683 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2684 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2685 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2686 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2687 JVM_END
2688
2689 // Printing support //////////////////////////////////////////////////
2690 extern "C" {
2691
2692 ATTRIBUTE_PRINTF(3, 0)
2693 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2694 // Reject count values that are negative signed values converted to
2695 // unsigned; see bug 4399518, 4417214
2696 if ((intptr_t)count <= 0) return -1;
2697
2698 int result = os::vsnprintf(str, count, fmt, args);
2699 if (result > 0 && (size_t)result >= count) {
2700 result = -1;
2701 }
2702
2703 return result;
2704 }
2705
2706 ATTRIBUTE_PRINTF(3, 4)
2707 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2708 va_list args;
2709 int len;
2710 va_start(args, fmt);
2711 len = jio_vsnprintf(str, count, fmt, args);
2712 va_end(args);
2713 return len;
2714 }
2715
2716 ATTRIBUTE_PRINTF(2, 3)
2717 int jio_fprintf(FILE* f, const char *fmt, ...) {
2718 int len;
2719 va_list args;
2720 va_start(args, fmt);
2721 len = jio_vfprintf(f, fmt, args);
2722 va_end(args);
2723 return len;
2724 }
2725
2726 ATTRIBUTE_PRINTF(2, 0)
2727 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2728 if (Arguments::vfprintf_hook() != NULL) {
2729 return Arguments::vfprintf_hook()(f, fmt, args);
2730 } else {
2731 return vfprintf(f, fmt, args);
2732 }
2733 }
2734
2735 ATTRIBUTE_PRINTF(1, 2)
2736 JNIEXPORT int jio_printf(const char *fmt, ...) {
2737 int len;
2738 va_list args;
2739 va_start(args, fmt);
2740 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2741 va_end(args);
2742 return len;
2743 }
2744
2745 // HotSpot specific jio method
2746 void jio_print(const char* s, size_t len) {
2747 // Try to make this function as atomic as possible.
2748 if (Arguments::vfprintf_hook() != NULL) {
2749 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2750 } else {
2751 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2752 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2753 }
2754 }
2755
2756 } // Extern C
2757
2758 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2759
2760 // In most of the JVM thread support functions we need to access the
2761 // thread through a ThreadsListHandle to prevent it from exiting and
2762 // being reclaimed while we try to operate on it. The exceptions to this
2763 // rule are when operating on the current thread, or if the monitor of
2764 // the target java.lang.Thread is locked at the Java level - in both
2765 // cases the target cannot exit.
2766
2767 static void thread_entry(JavaThread* thread, TRAPS) {
2768 HandleMark hm(THREAD);
2769 Handle obj(THREAD, thread->threadObj());
2770 JavaValue result(T_VOID);
2771 JavaCalls::call_virtual(&result,
2772 obj,
2773 SystemDictionary::Thread_klass(),
2774 vmSymbols::run_method_name(),
2775 vmSymbols::void_method_signature(),
2776 THREAD);
2777 }
2778
2779
2780 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2781 JVMWrapper("JVM_StartThread");
2782 JavaThread *native_thread = NULL;
2783
2784 // We cannot hold the Threads_lock when we throw an exception,
2785 // due to rank ordering issues. Example: we might need to grab the
2786 // Heap_lock while we construct the exception.
2787 bool throw_illegal_thread_state = false;
2788
2789 // We must release the Threads_lock before we can post a jvmti event
2790 // in Thread::start.
2791 {
2792 // Ensure that the C++ Thread and OSThread structures aren't freed before
2793 // we operate.
2794 MutexLocker mu(Threads_lock);
2795
2796 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2797 // re-starting an already started thread, so we should usually find
2798 // that the JavaThread is null. However for a JNI attached thread
2799 // there is a small window between the Thread object being created
2800 // (with its JavaThread set) and the update to its threadStatus, so we
2801 // have to check for this
2802 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2803 throw_illegal_thread_state = true;
2804 } else {
2805 // We could also check the stillborn flag to see if this thread was already stopped, but
2806 // for historical reasons we let the thread detect that itself when it starts running
2807
2808 jlong size =
2809 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2810 // Allocate the C++ Thread structure and create the native thread. The
2811 // stack size retrieved from java is 64-bit signed, but the constructor takes
2812 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2813 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2814 // - Avoid passing negative values which would result in really large stacks.
2815 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2816 size_t sz = size > 0 ? (size_t) size : 0;
2817 native_thread = new JavaThread(&thread_entry, sz);
2818
2819 // At this point it may be possible that no osthread was created for the
2820 // JavaThread due to lack of memory. Check for this situation and throw
2821 // an exception if necessary. Eventually we may want to change this so
2822 // that we only grab the lock if the thread was created successfully -
2823 // then we can also do this check and throw the exception in the
2824 // JavaThread constructor.
2825 if (native_thread->osthread() != NULL) {
2826 // Note: the current thread is not being used within "prepare".
2827 native_thread->prepare(jthread);
2828 }
2829 }
2830 }
2831
2832 if (throw_illegal_thread_state) {
2833 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2834 }
2835
2836 assert(native_thread != NULL, "Starting null thread?");
2837
2838 if (native_thread->osthread() == NULL) {
2839 // No one should hold a reference to the 'native_thread'.
2840 native_thread->smr_delete();
2841 if (JvmtiExport::should_post_resource_exhausted()) {
2842 JvmtiExport::post_resource_exhausted(
2843 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2844 os::native_thread_creation_failed_msg());
2845 }
2846 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2847 os::native_thread_creation_failed_msg());
2848 }
2849
2850 Thread::start(native_thread);
2851
2852 JVM_END
2853
2854
2855 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2856 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2857 // but is thought to be reliable and simple. In the case, where the receiver is the
2858 // same thread as the sender, no VM_Operation is needed.
2859 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2860 JVMWrapper("JVM_StopThread");
2861
2862 // A nested ThreadsListHandle will grab the Threads_lock so create
2863 // tlh before we resolve throwable.
2864 ThreadsListHandle tlh(thread);
2865 oop java_throwable = JNIHandles::resolve(throwable);
2866 if (java_throwable == NULL) {
2867 THROW(vmSymbols::java_lang_NullPointerException());
2868 }
2869 oop java_thread = NULL;
2870 JavaThread* receiver = NULL;
2871 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2872 Events::log_exception(thread,
2873 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2874 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2875
2876 if (is_alive) {
2877 // jthread refers to a live JavaThread.
2878 if (thread == receiver) {
2879 // Exception is getting thrown at self so no VM_Operation needed.
2880 THROW_OOP(java_throwable);
2881 } else {
2882 // Use a VM_Operation to throw the exception.
2883 Thread::send_async_exception(java_thread, java_throwable);
2884 }
2885 } else {
2886 // Either:
2887 // - target thread has not been started before being stopped, or
2888 // - target thread already terminated
2889 // We could read the threadStatus to determine which case it is
2890 // but that is overkill as it doesn't matter. We must set the
2891 // stillborn flag for the first case, and if the thread has already
2892 // exited setting this flag has no effect.
2893 java_lang_Thread::set_stillborn(java_thread);
2894 }
2895 JVM_END
2896
2897
2898 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2899 JVMWrapper("JVM_IsThreadAlive");
2900
2901 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2902 return java_lang_Thread::is_alive(thread_oop);
2903 JVM_END
2904
2905
2906 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2907 JVMWrapper("JVM_SuspendThread");
2908
2909 ThreadsListHandle tlh(thread);
2910 JavaThread* receiver = NULL;
2911 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2912 if (is_alive) {
2913 // jthread refers to a live JavaThread.
2914 {
2915 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2916 if (receiver->is_external_suspend()) {
2917 // Don't allow nested external suspend requests. We can't return
2918 // an error from this interface so just ignore the problem.
2919 return;
2920 }
2921 if (receiver->is_exiting()) { // thread is in the process of exiting
2922 return;
2923 }
2924 receiver->set_external_suspend();
2925 }
2926
2927 // java_suspend() will catch threads in the process of exiting
2928 // and will ignore them.
2929 receiver->java_suspend();
2930
2931 // It would be nice to have the following assertion in all the
2932 // time, but it is possible for a racing resume request to have
2933 // resumed this thread right after we suspended it. Temporarily
2934 // enable this assertion if you are chasing a different kind of
2935 // bug.
2936 //
2937 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2938 // receiver->is_being_ext_suspended(), "thread is not suspended");
2939 }
2940 JVM_END
2941
2942
2943 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2944 JVMWrapper("JVM_ResumeThread");
2945
2946 ThreadsListHandle tlh(thread);
2947 JavaThread* receiver = NULL;
2948 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2949 if (is_alive) {
2950 // jthread refers to a live JavaThread.
2951
2952 // This is the original comment for this Threads_lock grab:
2953 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2954 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2955 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2956 // looks at it.
2957 //
2958 // The above comment dates back to when we had both internal and
2959 // external suspend APIs that shared a common underlying mechanism.
2960 // External suspend is now entirely cooperative and doesn't share
2961 // anything with internal suspend. That said, there are some
2962 // assumptions in the VM that an external resume grabs the
2963 // Threads_lock. We can't drop the Threads_lock grab here until we
2964 // resolve the assumptions that exist elsewhere.
2965 //
2966 MutexLocker ml(Threads_lock);
2967 receiver->java_resume();
2968 }
2969 JVM_END
2970
2971
2972 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2973 JVMWrapper("JVM_SetThreadPriority");
2974
2975 ThreadsListHandle tlh(thread);
2976 oop java_thread = NULL;
2977 JavaThread* receiver = NULL;
2978 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2979 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2980
2981 if (is_alive) {
2982 // jthread refers to a live JavaThread.
2983 Thread::set_priority(receiver, (ThreadPriority)prio);
2984 }
2985 // Implied else: If the JavaThread hasn't started yet, then the
2986 // priority set in the java.lang.Thread object above will be pushed
2987 // down when it does start.
2988 JVM_END
2989
2990
2991 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2992 JVMWrapper("JVM_Yield");
2993 if (os::dont_yield()) return;
2994 HOTSPOT_THREAD_YIELD();
2995 os::naked_yield();
2996 JVM_END
2997
2998 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2999 assert(event != NULL, "invariant");
3000 assert(event->should_commit(), "invariant");
3001 event->set_time(millis);
3002 event->commit();
3003 }
3004
3005 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3006 JVMWrapper("JVM_Sleep");
3007
3008 if (millis < 0) {
3009 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3010 }
3011
3012 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3013 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3014 }
3015
3016 // Save current thread state and restore it at the end of this block.
3017 // And set new thread state to SLEEPING.
3018 JavaThreadSleepState jtss(thread);
3019
3020 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3021 EventThreadSleep event;
3022
3023 if (millis == 0) {
3024 os::naked_yield();
3025 } else {
3026 ThreadState old_state = thread->osthread()->get_state();
3027 thread->osthread()->set_state(SLEEPING);
3028 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3029 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3030 // us while we were sleeping. We do not overwrite those.
3031 if (!HAS_PENDING_EXCEPTION) {
3032 if (event.should_commit()) {
3033 post_thread_sleep_event(&event, millis);
3034 }
3035 HOTSPOT_THREAD_SLEEP_END(1);
3036
3037 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3038 // to properly restore the thread state. That's likely wrong.
3039 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3040 }
3041 }
3042 thread->osthread()->set_state(old_state);
3043 }
3044 if (event.should_commit()) {
3045 post_thread_sleep_event(&event, millis);
3046 }
3047 HOTSPOT_THREAD_SLEEP_END(0);
3048 JVM_END
3049
3050 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3051 JVMWrapper("JVM_CurrentThread");
3052 oop jthread = thread->threadObj();
3053 assert (thread != NULL, "no current thread!");
3054 return JNIHandles::make_local(env, jthread);
3055 JVM_END
3056
3057
3058 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3059 JVMWrapper("JVM_CountStackFrames");
3060
3061 uint32_t debug_bits = 0;
3062 ThreadsListHandle tlh(thread);
3063 JavaThread* receiver = NULL;
3064 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3065 int count = 0;
3066 if (is_alive) {
3067 // jthread refers to a live JavaThread.
3068 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3069 // Count all java activation, i.e., number of vframes.
3070 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3071 // Native frames are not counted.
3072 if (!vfst.method()->is_native()) count++;
3073 }
3074 } else {
3075 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3076 "this thread is not suspended");
3077 }
3078 }
3079 // Implied else: if JavaThread is not alive simply return a count of 0.
3080
3081 return count;
3082 JVM_END
3083
3084
3085 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3086 JVMWrapper("JVM_Interrupt");
3087
3088 ThreadsListHandle tlh(thread);
3089 JavaThread* receiver = NULL;
3090 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3091 if (is_alive) {
3092 // jthread refers to a live JavaThread.
3093 Thread::interrupt(receiver);
3094 }
3095 JVM_END
3096
3097
3098 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3099 JVMWrapper("JVM_IsInterrupted");
3100
3101 ThreadsListHandle tlh(thread);
3102 JavaThread* receiver = NULL;
3103 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3104 if (is_alive) {
3105 // jthread refers to a live JavaThread.
3106 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3107 } else {
3108 return JNI_FALSE;
3109 }
3110 JVM_END
3111
3112
3113 // Return true iff the current thread has locked the object passed in
3114
3115 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3116 JVMWrapper("JVM_HoldsLock");
3117 assert(THREAD->is_Java_thread(), "sanity check");
3118 if (obj == NULL) {
3119 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3120 }
3121 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3122 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3123 JVM_END
3124
3125
3126 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3127 JVMWrapper("JVM_DumpAllStacks");
3128 VM_PrintThreads op;
3129 VMThread::execute(&op);
3130 if (JvmtiExport::should_post_data_dump()) {
3131 JvmtiExport::post_data_dump();
3132 }
3133 JVM_END
3134
3135 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3136 JVMWrapper("JVM_SetNativeThreadName");
3137
3138 // We don't use a ThreadsListHandle here because the current thread
3139 // must be alive.
3140 oop java_thread = JNIHandles::resolve_non_null(jthread);
3141 JavaThread* thr = java_lang_Thread::thread(java_thread);
3142 if (thread == thr && !thr->has_attached_via_jni()) {
3143 // Thread naming is only supported for the current thread and
3144 // we don't set the name of an attached thread to avoid stepping
3145 // on other programs.
3146 ResourceMark rm(thread);
3147 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3148 os::set_native_thread_name(thread_name);
3149 }
3150 JVM_END
3151
3152 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3153
3154 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3155 JVMWrapper("JVM_GetClassContext");
3156 ResourceMark rm(THREAD);
3157 JvmtiVMObjectAllocEventCollector oam;
3158 vframeStream vfst(thread);
3159
3160 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3161 // This must only be called from SecurityManager.getClassContext
3162 Method* m = vfst.method();
3163 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3164 m->name() == vmSymbols::getClassContext_name() &&
3165 m->signature() == vmSymbols::void_class_array_signature())) {
3166 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3167 }
3168 }
3169
3170 // Collect method holders
3171 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3172 for (; !vfst.at_end(); vfst.security_next()) {
3173 Method* m = vfst.method();
3174 // Native frames are not returned
3175 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3176 Klass* holder = m->method_holder();
3177 assert(holder->is_klass(), "just checking");
3178 klass_array->append(holder);
3179 }
3180 }
3181
3182 // Create result array of type [Ljava/lang/Class;
3183 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3184 // Fill in mirrors corresponding to method holders
3185 for (int i = 0; i < klass_array->length(); i++) {
3186 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3187 }
3188
3189 return (jobjectArray) JNIHandles::make_local(env, result);
3190 JVM_END
3191
3192
3193 // java.lang.Package ////////////////////////////////////////////////////////////////
3194
3195
3196 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3197 JVMWrapper("JVM_GetSystemPackage");
3198 ResourceMark rm(THREAD);
3199 JvmtiVMObjectAllocEventCollector oam;
3200 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3201 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3202 return (jstring) JNIHandles::make_local(result);
3203 JVM_END
3204
3205
3206 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3207 JVMWrapper("JVM_GetSystemPackages");
3208 JvmtiVMObjectAllocEventCollector oam;
3209 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3210 return (jobjectArray) JNIHandles::make_local(result);
3211 JVM_END
3212
3213
3214 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3215
3216
3217 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3218 JVMWrapper("JVM_GetAndClearReferencePendingList");
3219
3220 MonitorLockerEx ml(Heap_lock);
3221 oop ref = Universe::reference_pending_list();
3222 if (ref != NULL) {
3223 Universe::set_reference_pending_list(NULL);
3224 }
3225 return JNIHandles::make_local(env, ref);
3226 JVM_END
3227
3228 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3229 JVMWrapper("JVM_HasReferencePendingList");
3230 MonitorLockerEx ml(Heap_lock);
3231 return Universe::has_reference_pending_list();
3232 JVM_END
3233
3234 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3235 JVMWrapper("JVM_WaitForReferencePendingList");
3236 MonitorLockerEx ml(Heap_lock);
3237 while (!Universe::has_reference_pending_list()) {
3238 ml.wait();
3239 }
3240 JVM_END
3241
3242
3243 // ObjectInputStream ///////////////////////////////////////////////////////////////
3244
3245 // Return the first user-defined class loader up the execution stack, or null
3246 // if only code from the bootstrap or platform class loader is on the stack.
3247
3248 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3249 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3250 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3251 oop loader = vfst.method()->method_holder()->class_loader();
3252 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3253 return JNIHandles::make_local(env, loader);
3254 }
3255 }
3256 return NULL;
3257 JVM_END
3258
3259
3260 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3261
3262
3263 // resolve array handle and check arguments
3264 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3265 if (arr == NULL) {
3266 THROW_0(vmSymbols::java_lang_NullPointerException());
3267 }
3268 oop a = JNIHandles::resolve_non_null(arr);
3269 if (!a->is_array()) {
3270 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3271 } else if (type_array_only && !a->is_typeArray()) {
3272 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3273 }
3274 return arrayOop(a);
3275 }
3276
3277
3278 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3279 JVMWrapper("JVM_GetArrayLength");
3280 arrayOop a = check_array(env, arr, false, CHECK_0);
3281 return a->length();
3282 JVM_END
3283
3284
3285 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3286 JVMWrapper("JVM_Array_Get");
3287 JvmtiVMObjectAllocEventCollector oam;
3288 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3289 jvalue value;
3290 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3291 oop box = Reflection::box(&value, type, CHECK_NULL);
3292 return JNIHandles::make_local(env, box);
3293 JVM_END
3294
3295
3296 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3297 JVMWrapper("JVM_GetPrimitiveArrayElement");
3298 jvalue value;
3299 value.i = 0; // to initialize value before getting used in CHECK
3300 arrayOop a = check_array(env, arr, true, CHECK_(value));
3301 assert(a->is_typeArray(), "just checking");
3302 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3303 BasicType wide_type = (BasicType) wCode;
3304 if (type != wide_type) {
3305 Reflection::widen(&value, type, wide_type, CHECK_(value));
3306 }
3307 return value;
3308 JVM_END
3309
3310
3311 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3312 JVMWrapper("JVM_SetArrayElement");
3313 arrayOop a = check_array(env, arr, false, CHECK);
3314 oop box = JNIHandles::resolve(val);
3315 jvalue value;
3316 value.i = 0; // to initialize value before getting used in CHECK
3317 BasicType value_type;
3318 if (a->is_objArray()) {
3319 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3320 value_type = Reflection::unbox_for_regular_object(box, &value);
3321 } else {
3322 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3323 }
3324 Reflection::array_set(&value, a, index, value_type, CHECK);
3325 JVM_END
3326
3327
3328 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3329 JVMWrapper("JVM_SetPrimitiveArrayElement");
3330 arrayOop a = check_array(env, arr, true, CHECK);
3331 assert(a->is_typeArray(), "just checking");
3332 BasicType value_type = (BasicType) vCode;
3333 Reflection::array_set(&v, a, index, value_type, CHECK);
3334 JVM_END
3335
3336
3337 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3338 JVMWrapper("JVM_NewArray");
3339 JvmtiVMObjectAllocEventCollector oam;
3340 oop element_mirror = JNIHandles::resolve(eltClass);
3341 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3342 return JNIHandles::make_local(env, result);
3343 JVM_END
3344
3345
3346 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3347 JVMWrapper("JVM_NewMultiArray");
3348 JvmtiVMObjectAllocEventCollector oam;
3349 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3350 oop element_mirror = JNIHandles::resolve(eltClass);
3351 assert(dim_array->is_typeArray(), "just checking");
3352 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3353 return JNIHandles::make_local(env, result);
3354 JVM_END
3355
3356
3357 // Library support ///////////////////////////////////////////////////////////////////////////
3358
3359 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3360 //%note jvm_ct
3361 JVMWrapper("JVM_LoadLibrary");
3362 char ebuf[1024];
3363 void *load_result;
3364 {
3365 ThreadToNativeFromVM ttnfvm(thread);
3366 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3367 }
3368 if (load_result == NULL) {
3369 char msg[1024];
3370 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3371 // Since 'ebuf' may contain a string encoded using
3372 // platform encoding scheme, we need to pass
3373 // Exceptions::unsafe_to_utf8 to the new_exception method
3374 // as the last argument. See bug 6367357.
3375 Handle h_exception =
3376 Exceptions::new_exception(thread,
3377 vmSymbols::java_lang_UnsatisfiedLinkError(),
3378 msg, Exceptions::unsafe_to_utf8);
3379
3380 THROW_HANDLE_0(h_exception);
3381 }
3382 return load_result;
3383 JVM_END
3384
3385
3386 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3387 JVMWrapper("JVM_UnloadLibrary");
3388 os::dll_unload(handle);
3389 JVM_END
3390
3391
3392 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3393 JVMWrapper("JVM_FindLibraryEntry");
3394 return os::dll_lookup(handle, name);
3395 JVM_END
3396
3397
3398 // JNI version ///////////////////////////////////////////////////////////////////////////////
3399
3400 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3401 JVMWrapper("JVM_IsSupportedJNIVersion");
3402 return Threads::is_supported_jni_version_including_1_1(version);
3403 JVM_END
3404
3405
3406 // String support ///////////////////////////////////////////////////////////////////////////
3407
3408 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3409 JVMWrapper("JVM_InternString");
3410 JvmtiVMObjectAllocEventCollector oam;
3411 if (str == NULL) return NULL;
3412 oop string = JNIHandles::resolve_non_null(str);
3413 oop result = StringTable::intern(string, CHECK_NULL);
3414 return (jstring) JNIHandles::make_local(env, result);
3415 JVM_END
3416
3417
3418 // Raw monitor support //////////////////////////////////////////////////////////////////////
3419
3420 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3421 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3422 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3423 // that only works with java threads.
3424
3425
3426 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3427 VM_Exit::block_if_vm_exited();
3428 JVMWrapper("JVM_RawMonitorCreate");
3429 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3430 }
3431
3432
3433 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3434 VM_Exit::block_if_vm_exited();
3435 JVMWrapper("JVM_RawMonitorDestroy");
3436 delete ((Mutex*) mon);
3437 }
3438
3439
3440 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3441 VM_Exit::block_if_vm_exited();
3442 JVMWrapper("JVM_RawMonitorEnter");
3443 ((Mutex*) mon)->jvm_raw_lock();
3444 return 0;
3445 }
3446
3447
3448 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3449 VM_Exit::block_if_vm_exited();
3450 JVMWrapper("JVM_RawMonitorExit");
3451 ((Mutex*) mon)->jvm_raw_unlock();
3452 }
3453
3454
3455 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3456
3457 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3458 Handle loader, Handle protection_domain,
3459 jboolean throwError, TRAPS) {
3460 // Security Note:
3461 // The Java level wrapper will perform the necessary security check allowing
3462 // us to pass the NULL as the initiating class loader. The VM is responsible for
3463 // the checkPackageAccess relative to the initiating class loader via the
3464 // protection_domain. The protection_domain is passed as NULL by the java code
3465 // if there is no security manager in 3-arg Class.forName().
3466 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3467
3468 // Check if we should initialize the class
3469 if (init && klass->is_instance_klass()) {
3470 klass->initialize(CHECK_NULL);
3471 }
3472 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3473 }
3474
3475
3476 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3477
3478 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3479 JVMWrapper("JVM_InvokeMethod");
3480 Handle method_handle;
3481 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3482 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3483 Handle receiver(THREAD, JNIHandles::resolve(obj));
3484 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3485 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3486 jobject res = JNIHandles::make_local(env, result);
3487 if (JvmtiExport::should_post_vm_object_alloc()) {
3488 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3489 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3490 if (java_lang_Class::is_primitive(ret_type)) {
3491 // Only for primitive type vm allocates memory for java object.
3492 // See box() method.
3493 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3494 }
3495 }
3496 return res;
3497 } else {
3498 THROW_0(vmSymbols::java_lang_StackOverflowError());
3499 }
3500 JVM_END
3501
3502
3503 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3504 JVMWrapper("JVM_NewInstanceFromConstructor");
3505 oop constructor_mirror = JNIHandles::resolve(c);
3506 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3507 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3508 jobject res = JNIHandles::make_local(env, result);
3509 if (JvmtiExport::should_post_vm_object_alloc()) {
3510 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3511 }
3512 return res;
3513 JVM_END
3514
3515 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3516
3517 JVM_LEAF(jboolean, JVM_SupportsCX8())
3518 JVMWrapper("JVM_SupportsCX8");
3519 return VM_Version::supports_cx8();
3520 JVM_END
3521
3522 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3523 JVMWrapper("JVM_InitializeFromArchive");
3524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3525 assert(k->is_klass(), "just checking");
3526 HeapShared::initialize_from_archived_subgraph(k);
3527 JVM_END
3528
3529 // Returns an array of all live Thread objects (VM internal JavaThreads,
3530 // jvmti agent threads, and JNI attaching threads are skipped)
3531 // See CR 6404306 regarding JNI attaching threads
3532 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3533 ResourceMark rm(THREAD);
3534 ThreadsListEnumerator tle(THREAD, false, false);
3535 JvmtiVMObjectAllocEventCollector oam;
3536
3537 int num_threads = tle.num_threads();
3538 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3539 objArrayHandle threads_ah(THREAD, r);
3540
3541 for (int i = 0; i < num_threads; i++) {
3542 Handle h = tle.get_threadObj(i);
3543 threads_ah->obj_at_put(i, h());
3544 }
3545
3546 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3547 JVM_END
3548
3549
3550 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3551 // Return StackTraceElement[][], each element is the stack trace of a thread in
3552 // the corresponding entry in the given threads array
3553 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3554 JVMWrapper("JVM_DumpThreads");
3555 JvmtiVMObjectAllocEventCollector oam;
3556
3557 // Check if threads is null
3558 if (threads == NULL) {
3559 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3560 }
3561
3562 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3563 objArrayHandle ah(THREAD, a);
3564 int num_threads = ah->length();
3565 // check if threads is non-empty array
3566 if (num_threads == 0) {
3567 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3568 }
3569
3570 // check if threads is not an array of objects of Thread class
3571 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3572 if (k != SystemDictionary::Thread_klass()) {
3573 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3574 }
3575
3576 ResourceMark rm(THREAD);
3577
3578 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3579 for (int i = 0; i < num_threads; i++) {
3580 oop thread_obj = ah->obj_at(i);
3581 instanceHandle h(THREAD, (instanceOop) thread_obj);
3582 thread_handle_array->append(h);
3583 }
3584
3585 // The JavaThread references in thread_handle_array are validated
3586 // in VM_ThreadDump::doit().
3587 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3588 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3589
3590 JVM_END
3591
3592 // JVM monitoring and management support
3593 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3594 return Management::get_jmm_interface(version);
3595 JVM_END
3596
3597 // com.sun.tools.attach.VirtualMachine agent properties support
3598 //
3599 // Initialize the agent properties with the properties maintained in the VM
3600 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3601 JVMWrapper("JVM_InitAgentProperties");
3602 ResourceMark rm;
3603
3604 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3605
3606 PUTPROP(props, "sun.java.command", Arguments::java_command());
3607 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3608 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3609 return properties;
3610 JVM_END
3611
3612 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3613 {
3614 JVMWrapper("JVM_GetEnclosingMethodInfo");
3615 JvmtiVMObjectAllocEventCollector oam;
3616
3617 if (ofClass == NULL) {
3618 return NULL;
3619 }
3620 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3621 // Special handling for primitive objects
3622 if (java_lang_Class::is_primitive(mirror())) {
3623 return NULL;
3624 }
3625 Klass* k = java_lang_Class::as_Klass(mirror());
3626 if (!k->is_instance_klass()) {
3627 return NULL;
3628 }
3629 InstanceKlass* ik = InstanceKlass::cast(k);
3630 int encl_method_class_idx = ik->enclosing_method_class_index();
3631 if (encl_method_class_idx == 0) {
3632 return NULL;
3633 }
3634 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3635 objArrayHandle dest(THREAD, dest_o);
3636 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3637 dest->obj_at_put(0, enc_k->java_mirror());
3638 int encl_method_method_idx = ik->enclosing_method_method_index();
3639 if (encl_method_method_idx != 0) {
3640 Symbol* sym = ik->constants()->symbol_at(
3641 extract_low_short_from_int(
3642 ik->constants()->name_and_type_at(encl_method_method_idx)));
3643 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3644 dest->obj_at_put(1, str());
3645 sym = ik->constants()->symbol_at(
3646 extract_high_short_from_int(
3647 ik->constants()->name_and_type_at(encl_method_method_idx)));
3648 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3649 dest->obj_at_put(2, str());
3650 }
3651 return (jobjectArray) JNIHandles::make_local(dest());
3652 }
3653 JVM_END
3654
3655 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3656 {
3657 memset(info, 0, info_size);
3658
3659 info->jvm_version = VM_Version::jvm_version();
3660 info->patch_version = VM_Version::vm_patch_version();
3661
3662 // when we add a new capability in the jvm_version_info struct, we should also
3663 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3664 // counter defined in runtimeService.cpp.
3665 info->is_attach_supported = AttachListener::is_attach_supported();
3666 }
3667 JVM_END
3668
3669 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3670 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3671 ResourceMark rm(THREAD);
3672
3673 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3674 return NULL;
3675 }
3676
3677 char** vm_flags = Arguments::jvm_flags_array();
3678 char** vm_args = Arguments::jvm_args_array();
3679 int num_flags = Arguments::num_jvm_flags();
3680 int num_args = Arguments::num_jvm_args();
3681
3682 InstanceKlass* ik = SystemDictionary::String_klass();
3683 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3684 objArrayHandle result_h(THREAD, r);
3685
3686 int index = 0;
3687 for (int j = 0; j < num_flags; j++, index++) {
3688 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3689 result_h->obj_at_put(index, h());
3690 }
3691 for (int i = 0; i < num_args; i++, index++) {
3692 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3693 result_h->obj_at_put(index, h());
3694 }
3695 return (jobjectArray) JNIHandles::make_local(env, result_h());
3696 JVM_END
3697
3698 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3699 return os::get_signal_number(name);
3700 JVM_END