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 "interpreter/bytecodeUtils.hpp"
41 #include "jfr/jfrEvents.hpp"
42 #include "logging/log.hpp"
43 #include "memory/heapShared.hpp"
44 #include "memory/oopFactory.hpp"
45 #include "memory/referenceType.hpp"
46 #include "memory/resourceArea.hpp"
47 #include "memory/universe.hpp"
48 #include "oops/access.inline.hpp"
49 #include "oops/constantPool.hpp"
50 #include "oops/fieldStreams.hpp"
51 #include "oops/instanceKlass.hpp"
52 #include "oops/method.hpp"
53 #include "oops/objArrayKlass.hpp"
54 #include "oops/objArrayOop.inline.hpp"
55 #include "oops/oop.inline.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 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
539 JVMWrapper("JVM_FillInStackTrace");
540 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
541 java_lang_Throwable::fill_in_stack_trace(exception);
542 JVM_END
543
544 // java.lang.NullPointerException ///////////////////////////////////////////
545
546 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
547 oop exc = JNIHandles::resolve_non_null(throwable);
548
549 Method* method;
550 int bci;
551 if (!java_lang_Throwable::get_method_and_bci(exc, &method, &bci)) {
552 return NULL;
553 }
554 if (method->is_native()) {
555 return NULL;
556 }
557
558 ResourceMark rm(THREAD);
559 TrackingStackCreator stc(method, bci);
560 char const* reason;
561 int slot = stc.get_null_pointer_slot(bci, &reason);
562
563 // Build the message.
564 stringStream ss;
565 if (slot == -2) {
566 return NULL;
567 } else if (slot == -1) {
568 ss.print("There cannot be a NullPointerException at bci %d of method %s",
569 bci, method->name_and_sig_as_C_string());
570 } else if (reason == NULL) {
571 ss.print("Cannot get the reason for the NullPointerException at bci %d of method %s",
572 bci, method->name_and_sig_as_C_string());
573 } else {
574 TrackingStackSource source = stc.get_source(bci, slot, 5);
575 if (source.get_type() != TrackingStackSource::INVALID) {
576 const char *msg = source.as_string();
577 if (strncmp("The return value of", msg, strlen("The return value of")) == 0) {
578 ss.print("%s is null. ", msg);
579 } else {
580 ss.print("'%s' is null. ", msg);
581 }
582 }
583 ss.print("%s", reason);
584 }
585
586 oop result = java_lang_String::create_oop_from_str(ss.as_string(), CHECK_0);
587 return (jstring) JNIHandles::make_local(env, result);
588 JVM_END
589
590 // java.lang.StackTraceElement //////////////////////////////////////////////
591
592
593 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
594 JVMWrapper("JVM_InitStackTraceElementArray");
595 Handle exception(THREAD, JNIHandles::resolve(throwable));
596 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
597 objArrayHandle stack_trace(THREAD, st);
598 // Fill in the allocated stack trace
599 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
600 JVM_END
601
602
603 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
604 JVMWrapper("JVM_InitStackTraceElement");
605 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
606 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
607 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
608 JVM_END
609
610
611 // java.lang.StackWalker //////////////////////////////////////////////////////
612
613
614 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
615 jint skip_frames, jint frame_count, jint start_index,
616 jobjectArray frames))
617 JVMWrapper("JVM_CallStackWalk");
618 JavaThread* jt = (JavaThread*) THREAD;
619 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
620 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
621 }
622
623 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
624
625 // frames array is a Class<?>[] array when only getting caller reference,
626 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
627 // be null.
628 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
629 objArrayHandle frames_array_h(THREAD, fa);
630
631 int limit = start_index + frame_count;
632 if (frames_array_h->length() < limit) {
633 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
634 }
635
636 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
637 start_index, frames_array_h, CHECK_NULL);
638 return JNIHandles::make_local(env, result);
639 JVM_END
640
641
642 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
643 jint frame_count, jint start_index,
644 jobjectArray frames))
645 JVMWrapper("JVM_MoreStackWalk");
646 JavaThread* jt = (JavaThread*) THREAD;
647
648 // frames array is a Class<?>[] array when only getting caller reference,
649 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
650 // be null.
651 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
652 objArrayHandle frames_array_h(THREAD, fa);
653
654 int limit = start_index+frame_count;
655 if (frames_array_h->length() < limit) {
656 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
657 }
658
659 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
660 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
661 start_index, frames_array_h, THREAD);
662 JVM_END
663
664 // java.lang.Object ///////////////////////////////////////////////
665
666
667 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
668 JVMWrapper("JVM_IHashCode");
669 // as implemented in the classic virtual machine; return 0 if object is NULL
670 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
671 JVM_END
672
673
674 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
675 JVMWrapper("JVM_MonitorWait");
676 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
677 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
678 if (JvmtiExport::should_post_monitor_wait()) {
679 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
680
681 // The current thread already owns the monitor and it has not yet
682 // been added to the wait queue so the current thread cannot be
683 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
684 // event handler cannot accidentally consume an unpark() meant for
685 // the ParkEvent associated with this ObjectMonitor.
686 }
687 ObjectSynchronizer::wait(obj, ms, CHECK);
688 JVM_END
689
690
691 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
692 JVMWrapper("JVM_MonitorNotify");
693 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
694 ObjectSynchronizer::notify(obj, CHECK);
695 JVM_END
696
697
698 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
699 JVMWrapper("JVM_MonitorNotifyAll");
700 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
701 ObjectSynchronizer::notifyall(obj, CHECK);
702 JVM_END
703
704
705 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
706 JVMWrapper("JVM_Clone");
707 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
708 Klass* klass = obj->klass();
709 JvmtiVMObjectAllocEventCollector oam;
710
711 #ifdef ASSERT
712 // Just checking that the cloneable flag is set correct
713 if (obj->is_array()) {
714 guarantee(klass->is_cloneable(), "all arrays are cloneable");
715 } else {
716 guarantee(obj->is_instance(), "should be instanceOop");
717 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
718 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
719 }
720 #endif
721
722 // Check if class of obj supports the Cloneable interface.
723 // All arrays are considered to be cloneable (See JLS 20.1.5).
724 // All j.l.r.Reference classes are considered non-cloneable.
725 if (!klass->is_cloneable() ||
726 (klass->is_instance_klass() &&
727 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
728 ResourceMark rm(THREAD);
729 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
730 }
731
732 // Make shallow object copy
733 const int size = obj->size();
734 oop new_obj_oop = NULL;
735 if (obj->is_array()) {
736 const int length = ((arrayOop)obj())->length();
737 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
738 /* do_zero */ true, CHECK_NULL);
739 } else {
740 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
741 }
742
743 HeapAccess<>::clone(obj(), new_obj_oop, size);
744
745 Handle new_obj(THREAD, new_obj_oop);
746 // Caution: this involves a java upcall, so the clone should be
747 // "gc-robust" by this stage.
748 if (klass->has_finalizer()) {
749 assert(obj->is_instance(), "should be instanceOop");
750 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
751 new_obj = Handle(THREAD, new_obj_oop);
752 }
753
754 return JNIHandles::make_local(env, new_obj());
755 JVM_END
756
757 // java.io.File ///////////////////////////////////////////////////////////////
758
759 JVM_LEAF(char*, JVM_NativePath(char* path))
760 JVMWrapper("JVM_NativePath");
761 return os::native_path(path);
762 JVM_END
763
764
765 // Misc. class handling ///////////////////////////////////////////////////////////
766
767
768 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
769 JVMWrapper("JVM_GetCallerClass");
770
771 // Getting the class of the caller frame.
772 //
773 // The call stack at this point looks something like this:
774 //
775 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
776 // [1] [ @CallerSensitive API.method ]
777 // [.] [ (skipped intermediate frames) ]
778 // [n] [ caller ]
779 vframeStream vfst(thread);
780 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
781 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
782 Method* m = vfst.method();
783 assert(m != NULL, "sanity");
784 switch (n) {
785 case 0:
786 // This must only be called from Reflection.getCallerClass
787 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
788 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
789 }
790 // fall-through
791 case 1:
792 // Frame 0 and 1 must be caller sensitive.
793 if (!m->caller_sensitive()) {
794 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
795 }
796 break;
797 default:
798 if (!m->is_ignored_by_security_stack_walk()) {
799 // We have reached the desired frame; return the holder class.
800 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
801 }
802 break;
803 }
804 }
805 return NULL;
806 JVM_END
807
808
809 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
810 JVMWrapper("JVM_FindPrimitiveClass");
811 oop mirror = NULL;
812 BasicType t = name2type(utf);
813 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
814 mirror = Universe::java_mirror(t);
815 }
816 if (mirror == NULL) {
817 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
818 } else {
819 return (jclass) JNIHandles::make_local(env, mirror);
820 }
821 JVM_END
822
823
824 // Returns a class loaded by the bootstrap class loader; or null
825 // if not found. ClassNotFoundException is not thrown.
826 // FindClassFromBootLoader is exported to the launcher for windows.
827 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
828 const char* name))
829 JVMWrapper("JVM_FindClassFromBootLoader");
830
831 // Java libraries should ensure that name is never null...
832 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
833 // It's impossible to create this class; the name cannot fit
834 // into the constant pool.
835 return NULL;
836 }
837
838 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
839 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
840 if (k == NULL) {
841 return NULL;
842 }
843
844 if (log_is_enabled(Debug, class, resolve)) {
845 trace_class_resolution(k);
846 }
847 return (jclass) JNIHandles::make_local(env, k->java_mirror());
848 JVM_END
849
850 // Find a class with this name in this loader, using the caller's protection domain.
851 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
852 jboolean init, jobject loader,
853 jclass caller))
854 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
855 // Java libraries should ensure that name is never null...
856 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
857 // It's impossible to create this class; the name cannot fit
858 // into the constant pool.
859 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
860 }
861
862 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
863
864 oop loader_oop = JNIHandles::resolve(loader);
865 oop from_class = JNIHandles::resolve(caller);
866 oop protection_domain = NULL;
867 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
868 // NPE. Put it in another way, the bootstrap class loader has all permission and
869 // thus no checkPackageAccess equivalence in the VM class loader.
870 // The caller is also passed as NULL by the java code if there is no security
871 // manager to avoid the performance cost of getting the calling class.
872 if (from_class != NULL && loader_oop != NULL) {
873 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
874 }
875
876 Handle h_loader(THREAD, loader_oop);
877 Handle h_prot(THREAD, protection_domain);
878 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
879 h_prot, false, THREAD);
880
881 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
882 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
883 }
884 return result;
885 JVM_END
886
887 // Currently only called from the old verifier.
888 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
889 jboolean init, jclass from))
890 JVMWrapper("JVM_FindClassFromClass");
891 if (name == NULL) {
892 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
893 }
894 if ((int)strlen(name) > Symbol::max_length()) {
895 // It's impossible to create this class; the name cannot fit
896 // into the constant pool.
897 Exceptions::fthrow(THREAD_AND_LOCATION,
898 vmSymbols::java_lang_NoClassDefFoundError(),
899 "Class name exceeds maximum length of %d: %s",
900 Symbol::max_length(),
901 name);
902 return 0;
903 }
904 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
905 oop from_class_oop = JNIHandles::resolve(from);
906 Klass* from_class = (from_class_oop == NULL)
907 ? (Klass*)NULL
908 : java_lang_Class::as_Klass(from_class_oop);
909 oop class_loader = NULL;
910 oop protection_domain = NULL;
911 if (from_class != NULL) {
912 class_loader = from_class->class_loader();
913 protection_domain = from_class->protection_domain();
914 }
915 Handle h_loader(THREAD, class_loader);
916 Handle h_prot (THREAD, protection_domain);
917 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
918 h_prot, true, thread);
919
920 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
921 // this function is generally only used for class loading during verification.
922 ResourceMark rm;
923 oop from_mirror = JNIHandles::resolve_non_null(from);
924 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
925 const char * from_name = from_class->external_name();
926
927 oop mirror = JNIHandles::resolve_non_null(result);
928 Klass* to_class = java_lang_Class::as_Klass(mirror);
929 const char * to = to_class->external_name();
930 log_debug(class, resolve)("%s %s (verification)", from_name, to);
931 }
932
933 return result;
934 JVM_END
935
936 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
937 if (loader.is_null()) {
938 return;
939 }
940
941 // check whether the current caller thread holds the lock or not.
942 // If not, increment the corresponding counter
943 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
944 ObjectSynchronizer::owner_self) {
945 counter->inc();
946 }
947 }
948
949 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
950 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
951 jobject loader, const jbyte *buf,
952 jsize len, jobject pd, const char *source,
953 TRAPS) {
954 if (source == NULL) source = "__JVM_DefineClass__";
955
956 assert(THREAD->is_Java_thread(), "must be a JavaThread");
957 JavaThread* jt = (JavaThread*) THREAD;
958
959 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
960 ClassLoader::perf_define_appclass_selftime(),
961 ClassLoader::perf_define_appclasses(),
962 jt->get_thread_stat()->perf_recursion_counts_addr(),
963 jt->get_thread_stat()->perf_timers_addr(),
964 PerfClassTraceTime::DEFINE_CLASS);
965
966 if (UsePerfData) {
967 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
968 }
969
970 // Since exceptions can be thrown, class initialization can take place
971 // if name is NULL no check for class name in .class stream has to be made.
972 TempNewSymbol class_name = NULL;
973 if (name != NULL) {
974 const int str_len = (int)strlen(name);
975 if (str_len > Symbol::max_length()) {
976 // It's impossible to create this class; the name cannot fit
977 // into the constant pool.
978 Exceptions::fthrow(THREAD_AND_LOCATION,
979 vmSymbols::java_lang_NoClassDefFoundError(),
980 "Class name exceeds maximum length of %d: %s",
981 Symbol::max_length(),
982 name);
983 return 0;
984 }
985 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
986 }
987
988 ResourceMark rm(THREAD);
989 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
990 Handle class_loader (THREAD, JNIHandles::resolve(loader));
991 if (UsePerfData) {
992 is_lock_held_by_thread(class_loader,
993 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
994 THREAD);
995 }
996 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
997 Klass* k = SystemDictionary::resolve_from_stream(class_name,
998 class_loader,
999 protection_domain,
1000 &st,
1001 CHECK_NULL);
1002
1003 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
1004 trace_class_resolution(k);
1005 }
1006
1007 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1008 }
1009
1010
1011 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1012 JVMWrapper("JVM_DefineClass");
1013
1014 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
1015 JVM_END
1016
1017
1018 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1019 JVMWrapper("JVM_DefineClassWithSource");
1020
1021 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
1022 JVM_END
1023
1024 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1025 JVMWrapper("JVM_FindLoadedClass");
1026 ResourceMark rm(THREAD);
1027
1028 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1029 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1030
1031 const char* str = java_lang_String::as_utf8_string(string());
1032 // Sanity check, don't expect null
1033 if (str == NULL) return NULL;
1034
1035 const int str_len = (int)strlen(str);
1036 if (str_len > Symbol::max_length()) {
1037 // It's impossible to create this class; the name cannot fit
1038 // into the constant pool.
1039 return NULL;
1040 }
1041 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1042
1043 // Security Note:
1044 // The Java level wrapper will perform the necessary security check allowing
1045 // us to pass the NULL as the initiating class loader.
1046 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1047 if (UsePerfData) {
1048 is_lock_held_by_thread(h_loader,
1049 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1050 THREAD);
1051 }
1052
1053 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1054 h_loader,
1055 Handle(),
1056 CHECK_NULL);
1057 #if INCLUDE_CDS
1058 if (k == NULL) {
1059 // If the class is not already loaded, try to see if it's in the shared
1060 // archive for the current classloader (h_loader).
1061 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1062 }
1063 #endif
1064 return (k == NULL) ? NULL :
1065 (jclass) JNIHandles::make_local(env, k->java_mirror());
1066 JVM_END
1067
1068 // Module support //////////////////////////////////////////////////////////////////////////////
1069
1070 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1071 jstring location, const char* const* packages, jsize num_packages))
1072 JVMWrapper("JVM_DefineModule");
1073 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1074 JVM_END
1075
1076 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1077 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1078 Modules::set_bootloader_unnamed_module(module, CHECK);
1079 JVM_END
1080
1081 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1082 JVMWrapper("JVM_AddModuleExports");
1083 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1084 JVM_END
1085
1086 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1087 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1088 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1089 JVM_END
1090
1091 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1092 JVMWrapper("JVM_AddModuleExportsToAll");
1093 Modules::add_module_exports(from_module, package, NULL, CHECK);
1094 JVM_END
1095
1096 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1097 JVMWrapper("JVM_AddReadsModule");
1098 Modules::add_reads_module(from_module, source_module, CHECK);
1099 JVM_END
1100
1101 // Reflection support //////////////////////////////////////////////////////////////////////////////
1102
1103 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1104 assert (cls != NULL, "illegal class");
1105 JVMWrapper("JVM_InitClassName");
1106 JvmtiVMObjectAllocEventCollector oam;
1107 ResourceMark rm(THREAD);
1108 HandleMark hm(THREAD);
1109 Handle java_class(THREAD, JNIHandles::resolve(cls));
1110 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1111 return (jstring) JNIHandles::make_local(env, result);
1112 JVM_END
1113
1114
1115 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1116 JVMWrapper("JVM_GetClassInterfaces");
1117 JvmtiVMObjectAllocEventCollector oam;
1118 oop mirror = JNIHandles::resolve_non_null(cls);
1119
1120 // Special handling for primitive objects
1121 if (java_lang_Class::is_primitive(mirror)) {
1122 // Primitive objects does not have any interfaces
1123 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1124 return (jobjectArray) JNIHandles::make_local(env, r);
1125 }
1126
1127 Klass* klass = java_lang_Class::as_Klass(mirror);
1128 // Figure size of result array
1129 int size;
1130 if (klass->is_instance_klass()) {
1131 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1132 } else {
1133 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1134 size = 2;
1135 }
1136
1137 // Allocate result array
1138 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1139 objArrayHandle result (THREAD, r);
1140 // Fill in result
1141 if (klass->is_instance_klass()) {
1142 // Regular instance klass, fill in all local interfaces
1143 for (int index = 0; index < size; index++) {
1144 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1145 result->obj_at_put(index, k->java_mirror());
1146 }
1147 } else {
1148 // All arrays implement java.lang.Cloneable and java.io.Serializable
1149 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1150 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1151 }
1152 return (jobjectArray) JNIHandles::make_local(env, result());
1153 JVM_END
1154
1155
1156 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1157 JVMWrapper("JVM_IsInterface");
1158 oop mirror = JNIHandles::resolve_non_null(cls);
1159 if (java_lang_Class::is_primitive(mirror)) {
1160 return JNI_FALSE;
1161 }
1162 Klass* k = java_lang_Class::as_Klass(mirror);
1163 jboolean result = k->is_interface();
1164 assert(!result || k->is_instance_klass(),
1165 "all interfaces are instance types");
1166 // The compiler intrinsic for isInterface tests the
1167 // Klass::_access_flags bits in the same way.
1168 return result;
1169 JVM_END
1170
1171
1172 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1173 JVMWrapper("JVM_GetClassSigners");
1174 JvmtiVMObjectAllocEventCollector oam;
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1176 // There are no signers for primitive types
1177 return NULL;
1178 }
1179
1180 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1181
1182 // If there are no signers set in the class, or if the class
1183 // is an array, return NULL.
1184 if (signers == NULL) return NULL;
1185
1186 // copy of the signers array
1187 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1188 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1189 for (int index = 0; index < signers->length(); index++) {
1190 signers_copy->obj_at_put(index, signers->obj_at(index));
1191 }
1192
1193 // return the copy
1194 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1195 JVM_END
1196
1197
1198 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1199 JVMWrapper("JVM_SetClassSigners");
1200 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1201 // This call is ignored for primitive types and arrays.
1202 // Signers are only set once, ClassLoader.java, and thus shouldn't
1203 // be called with an array. Only the bootstrap loader creates arrays.
1204 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1205 if (k->is_instance_klass()) {
1206 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1207 }
1208 }
1209 JVM_END
1210
1211
1212 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1213 JVMWrapper("JVM_GetProtectionDomain");
1214 if (JNIHandles::resolve(cls) == NULL) {
1215 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1216 }
1217
1218 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1219 // Primitive types does not have a protection domain.
1220 return NULL;
1221 }
1222
1223 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1224 return (jobject) JNIHandles::make_local(env, pd);
1225 JVM_END
1226
1227
1228 // Returns the inherited_access_control_context field of the running thread.
1229 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1230 JVMWrapper("JVM_GetInheritedAccessControlContext");
1231 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1232 return JNIHandles::make_local(env, result);
1233 JVM_END
1234
1235 class RegisterArrayForGC {
1236 private:
1237 JavaThread *_thread;
1238 public:
1239 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1240 _thread = thread;
1241 _thread->register_array_for_gc(array);
1242 }
1243
1244 ~RegisterArrayForGC() {
1245 _thread->register_array_for_gc(NULL);
1246 }
1247 };
1248
1249
1250 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1251 JVMWrapper("JVM_GetStackAccessControlContext");
1252 if (!UsePrivilegedStack) return NULL;
1253
1254 ResourceMark rm(THREAD);
1255 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1256 JvmtiVMObjectAllocEventCollector oam;
1257
1258 // count the protection domains on the execution stack. We collapse
1259 // duplicate consecutive protection domains into a single one, as
1260 // well as stopping when we hit a privileged frame.
1261
1262 oop previous_protection_domain = NULL;
1263 Handle privileged_context(thread, NULL);
1264 bool is_privileged = false;
1265 oop protection_domain = NULL;
1266
1267 // Iterate through Java frames
1268 vframeStream vfst(thread);
1269 for(; !vfst.at_end(); vfst.next()) {
1270 // get method of frame
1271 Method* method = vfst.method();
1272
1273 // stop at the first privileged frame
1274 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1275 method->name() == vmSymbols::executePrivileged_name())
1276 {
1277 // this frame is privileged
1278 is_privileged = true;
1279
1280 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1281
1282 StackValueCollection* locals = priv->locals();
1283 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1284 StackValue* clr_sv = locals->at(2); // Class<?> caller
1285 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1286 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1287 privileged_context = ctx_sv->get_obj();
1288 Handle caller = clr_sv->get_obj();
1289
1290 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1291 protection_domain = caller_klass->protection_domain();
1292 } else {
1293 protection_domain = method->method_holder()->protection_domain();
1294 }
1295
1296 if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1297 local_array->push(protection_domain);
1298 previous_protection_domain = protection_domain;
1299 }
1300
1301 if (is_privileged) break;
1302 }
1303
1304
1305 // either all the domains on the stack were system domains, or
1306 // we had a privileged system domain
1307 if (local_array->is_empty()) {
1308 if (is_privileged && privileged_context.is_null()) return NULL;
1309
1310 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1311 return JNIHandles::make_local(env, result);
1312 }
1313
1314 // the resource area must be registered in case of a gc
1315 RegisterArrayForGC ragc(thread, local_array);
1316 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1317 local_array->length(), CHECK_NULL);
1318 objArrayHandle h_context(thread, context);
1319 for (int index = 0; index < local_array->length(); index++) {
1320 h_context->obj_at_put(index, local_array->at(index));
1321 }
1322
1323 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1324
1325 return JNIHandles::make_local(env, result);
1326 JVM_END
1327
1328
1329 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1330 JVMWrapper("JVM_IsArrayClass");
1331 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1332 return (k != NULL) && k->is_array_klass() ? true : false;
1333 JVM_END
1334
1335
1336 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1337 JVMWrapper("JVM_IsPrimitiveClass");
1338 oop mirror = JNIHandles::resolve_non_null(cls);
1339 return (jboolean) java_lang_Class::is_primitive(mirror);
1340 JVM_END
1341
1342
1343 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1344 JVMWrapper("JVM_GetClassModifiers");
1345 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1346 // Primitive type
1347 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1348 }
1349
1350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1351 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1352 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1353 return k->modifier_flags();
1354 JVM_END
1355
1356
1357 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1358
1359 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1360 JvmtiVMObjectAllocEventCollector oam;
1361 // ofClass is a reference to a java_lang_Class object. The mirror object
1362 // of an InstanceKlass
1363
1364 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1365 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1366 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1367 return (jobjectArray)JNIHandles::make_local(env, result);
1368 }
1369
1370 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1371 InnerClassesIterator iter(k);
1372
1373 if (iter.length() == 0) {
1374 // Neither an inner nor outer class
1375 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1376 return (jobjectArray)JNIHandles::make_local(env, result);
1377 }
1378
1379 // find inner class info
1380 constantPoolHandle cp(thread, k->constants());
1381 int length = iter.length();
1382
1383 // Allocate temp. result array
1384 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1385 objArrayHandle result (THREAD, r);
1386 int members = 0;
1387
1388 for (; !iter.done(); iter.next()) {
1389 int ioff = iter.inner_class_info_index();
1390 int ooff = iter.outer_class_info_index();
1391
1392 if (ioff != 0 && ooff != 0) {
1393 // Check to see if the name matches the class we're looking for
1394 // before attempting to find the class.
1395 if (cp->klass_name_at_matches(k, ooff)) {
1396 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1397 if (outer_klass == k) {
1398 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1399 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1400
1401 // Throws an exception if outer klass has not declared k as
1402 // an inner klass
1403 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1404
1405 result->obj_at_put(members, inner_klass->java_mirror());
1406 members++;
1407 }
1408 }
1409 }
1410 }
1411
1412 if (members != length) {
1413 // Return array of right length
1414 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1415 for(int i = 0; i < members; i++) {
1416 res->obj_at_put(i, result->obj_at(i));
1417 }
1418 return (jobjectArray)JNIHandles::make_local(env, res);
1419 }
1420
1421 return (jobjectArray)JNIHandles::make_local(env, result());
1422 JVM_END
1423
1424
1425 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1426 {
1427 // ofClass is a reference to a java_lang_Class object.
1428 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1429 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1430 return NULL;
1431 }
1432
1433 bool inner_is_member = false;
1434 Klass* outer_klass
1435 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1436 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1437 if (outer_klass == NULL) return NULL; // already a top-level class
1438 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1439 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1440 }
1441 JVM_END
1442
1443 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1444 {
1445 oop mirror = JNIHandles::resolve_non_null(cls);
1446 if (java_lang_Class::is_primitive(mirror) ||
1447 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1448 return NULL;
1449 }
1450 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1451 int ooff = 0, noff = 0;
1452 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1453 if (noff != 0) {
1454 constantPoolHandle i_cp(thread, k->constants());
1455 Symbol* name = i_cp->symbol_at(noff);
1456 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1457 return (jstring) JNIHandles::make_local(env, str());
1458 }
1459 }
1460 return NULL;
1461 }
1462 JVM_END
1463
1464 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1465 assert (cls != NULL, "illegal class");
1466 JVMWrapper("JVM_GetClassSignature");
1467 JvmtiVMObjectAllocEventCollector oam;
1468 ResourceMark rm(THREAD);
1469 // Return null for arrays and primatives
1470 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1471 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1472 if (k->is_instance_klass()) {
1473 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1474 if (sym == NULL) return NULL;
1475 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1476 return (jstring) JNIHandles::make_local(env, str());
1477 }
1478 }
1479 return NULL;
1480 JVM_END
1481
1482
1483 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1484 assert (cls != NULL, "illegal class");
1485 JVMWrapper("JVM_GetClassAnnotations");
1486
1487 // Return null for arrays and primitives
1488 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1490 if (k->is_instance_klass()) {
1491 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1492 return (jbyteArray) JNIHandles::make_local(env, a);
1493 }
1494 }
1495 return NULL;
1496 JVM_END
1497
1498
1499 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1500 // some of this code was adapted from from jni_FromReflectedField
1501
1502 oop reflected = JNIHandles::resolve_non_null(field);
1503 oop mirror = java_lang_reflect_Field::clazz(reflected);
1504 Klass* k = java_lang_Class::as_Klass(mirror);
1505 int slot = java_lang_reflect_Field::slot(reflected);
1506 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1507
1508 InstanceKlass* ik = InstanceKlass::cast(k);
1509 intptr_t offset = ik->field_offset(slot);
1510
1511 if (modifiers & JVM_ACC_STATIC) {
1512 // for static fields we only look in the current class
1513 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1514 assert(false, "cannot find static field");
1515 return false;
1516 }
1517 } else {
1518 // for instance fields we start with the current class and work
1519 // our way up through the superclass chain
1520 if (!ik->find_field_from_offset(offset, false, &fd)) {
1521 assert(false, "cannot find instance field");
1522 return false;
1523 }
1524 }
1525 return true;
1526 }
1527
1528 static Method* jvm_get_method_common(jobject method) {
1529 // some of this code was adapted from from jni_FromReflectedMethod
1530
1531 oop reflected = JNIHandles::resolve_non_null(method);
1532 oop mirror = NULL;
1533 int slot = 0;
1534
1535 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1536 mirror = java_lang_reflect_Constructor::clazz(reflected);
1537 slot = java_lang_reflect_Constructor::slot(reflected);
1538 } else {
1539 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1540 "wrong type");
1541 mirror = java_lang_reflect_Method::clazz(reflected);
1542 slot = java_lang_reflect_Method::slot(reflected);
1543 }
1544 Klass* k = java_lang_Class::as_Klass(mirror);
1545
1546 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1547 assert(m != NULL, "cannot find method");
1548 return m; // caller has to deal with NULL in product mode
1549 }
1550
1551 /* Type use annotations support (JDK 1.8) */
1552
1553 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1554 assert (cls != NULL, "illegal class");
1555 JVMWrapper("JVM_GetClassTypeAnnotations");
1556 ResourceMark rm(THREAD);
1557 // Return null for arrays and primitives
1558 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1559 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1560 if (k->is_instance_klass()) {
1561 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1562 if (type_annotations != NULL) {
1563 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1564 return (jbyteArray) JNIHandles::make_local(env, a);
1565 }
1566 }
1567 }
1568 return NULL;
1569 JVM_END
1570
1571 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1572 assert (method != NULL, "illegal method");
1573 JVMWrapper("JVM_GetMethodTypeAnnotations");
1574
1575 // method is a handle to a java.lang.reflect.Method object
1576 Method* m = jvm_get_method_common(method);
1577 if (m == NULL) {
1578 return NULL;
1579 }
1580
1581 AnnotationArray* type_annotations = m->type_annotations();
1582 if (type_annotations != NULL) {
1583 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1584 return (jbyteArray) JNIHandles::make_local(env, a);
1585 }
1586
1587 return NULL;
1588 JVM_END
1589
1590 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1591 assert (field != NULL, "illegal field");
1592 JVMWrapper("JVM_GetFieldTypeAnnotations");
1593
1594 fieldDescriptor fd;
1595 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1596 if (!gotFd) {
1597 return NULL;
1598 }
1599
1600 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1601 JVM_END
1602
1603 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1604 if (!cp->is_within_bounds(index)) {
1605 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1606 }
1607 }
1608
1609 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1610 {
1611 JVMWrapper("JVM_GetMethodParameters");
1612 // method is a handle to a java.lang.reflect.Method object
1613 Method* method_ptr = jvm_get_method_common(method);
1614 methodHandle mh (THREAD, method_ptr);
1615 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1616 const int num_params = mh->method_parameters_length();
1617
1618 if (num_params < 0) {
1619 // A -1 return value from method_parameters_length means there is no
1620 // parameter data. Return null to indicate this to the reflection
1621 // API.
1622 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1623 return (jobjectArray)NULL;
1624 } else {
1625 // Otherwise, we return something up to reflection, even if it is
1626 // a zero-length array. Why? Because in some cases this can
1627 // trigger a MalformedParametersException.
1628
1629 // make sure all the symbols are properly formatted
1630 for (int i = 0; i < num_params; i++) {
1631 MethodParametersElement* params = mh->method_parameters_start();
1632 int index = params[i].name_cp_index;
1633 bounds_check(mh->constants(), index, CHECK_NULL);
1634
1635 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1636 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1637 "Wrong type at constant pool index");
1638 }
1639
1640 }
1641
1642 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1643 objArrayHandle result (THREAD, result_oop);
1644
1645 for (int i = 0; i < num_params; i++) {
1646 MethodParametersElement* params = mh->method_parameters_start();
1647 // For a 0 index, give a NULL symbol
1648 Symbol* sym = 0 != params[i].name_cp_index ?
1649 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1650 int flags = params[i].flags;
1651 oop param = Reflection::new_parameter(reflected_method, i, sym,
1652 flags, CHECK_NULL);
1653 result->obj_at_put(i, param);
1654 }
1655 return (jobjectArray)JNIHandles::make_local(env, result());
1656 }
1657 }
1658 JVM_END
1659
1660 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1661
1662 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1663 {
1664 JVMWrapper("JVM_GetClassDeclaredFields");
1665 JvmtiVMObjectAllocEventCollector oam;
1666
1667 // Exclude primitive types and array types
1668 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1669 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1670 // Return empty array
1671 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1672 return (jobjectArray) JNIHandles::make_local(env, res);
1673 }
1674
1675 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1676 constantPoolHandle cp(THREAD, k->constants());
1677
1678 // Ensure class is linked
1679 k->link_class(CHECK_NULL);
1680
1681 // Allocate result
1682 int num_fields;
1683
1684 if (publicOnly) {
1685 num_fields = 0;
1686 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1687 if (fs.access_flags().is_public()) ++num_fields;
1688 }
1689 } else {
1690 num_fields = k->java_fields_count();
1691 }
1692
1693 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1694 objArrayHandle result (THREAD, r);
1695
1696 int out_idx = 0;
1697 fieldDescriptor fd;
1698 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1699 if (!publicOnly || fs.access_flags().is_public()) {
1700 fd.reinitialize(k, fs.index());
1701 oop field = Reflection::new_field(&fd, CHECK_NULL);
1702 result->obj_at_put(out_idx, field);
1703 ++out_idx;
1704 }
1705 }
1706 assert(out_idx == num_fields, "just checking");
1707 return (jobjectArray) JNIHandles::make_local(env, result());
1708 }
1709 JVM_END
1710
1711 static bool select_method(const methodHandle& method, bool want_constructor) {
1712 if (want_constructor) {
1713 return (method->is_initializer() && !method->is_static());
1714 } else {
1715 return (!method->is_initializer() && !method->is_overpass());
1716 }
1717 }
1718
1719 static jobjectArray get_class_declared_methods_helper(
1720 JNIEnv *env,
1721 jclass ofClass, jboolean publicOnly,
1722 bool want_constructor,
1723 Klass* klass, TRAPS) {
1724
1725 JvmtiVMObjectAllocEventCollector oam;
1726
1727 // Exclude primitive types and array types
1728 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1729 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1730 // Return empty array
1731 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1732 return (jobjectArray) JNIHandles::make_local(env, res);
1733 }
1734
1735 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1736
1737 // Ensure class is linked
1738 k->link_class(CHECK_NULL);
1739
1740 Array<Method*>* methods = k->methods();
1741 int methods_length = methods->length();
1742
1743 // Save original method_idnum in case of redefinition, which can change
1744 // the idnum of obsolete methods. The new method will have the same idnum
1745 // but if we refresh the methods array, the counts will be wrong.
1746 ResourceMark rm(THREAD);
1747 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1748 int num_methods = 0;
1749
1750 for (int i = 0; i < methods_length; i++) {
1751 methodHandle method(THREAD, methods->at(i));
1752 if (select_method(method, want_constructor)) {
1753 if (!publicOnly || method->is_public()) {
1754 idnums->push(method->method_idnum());
1755 ++num_methods;
1756 }
1757 }
1758 }
1759
1760 // Allocate result
1761 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1762 objArrayHandle result (THREAD, r);
1763
1764 // Now just put the methods that we selected above, but go by their idnum
1765 // in case of redefinition. The methods can be redefined at any safepoint,
1766 // so above when allocating the oop array and below when creating reflect
1767 // objects.
1768 for (int i = 0; i < num_methods; i++) {
1769 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1770 if (method.is_null()) {
1771 // Method may have been deleted and seems this API can handle null
1772 // Otherwise should probably put a method that throws NSME
1773 result->obj_at_put(i, NULL);
1774 } else {
1775 oop m;
1776 if (want_constructor) {
1777 m = Reflection::new_constructor(method, CHECK_NULL);
1778 } else {
1779 m = Reflection::new_method(method, false, CHECK_NULL);
1780 }
1781 result->obj_at_put(i, m);
1782 }
1783 }
1784
1785 return (jobjectArray) JNIHandles::make_local(env, result());
1786 }
1787
1788 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1789 {
1790 JVMWrapper("JVM_GetClassDeclaredMethods");
1791 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1792 /*want_constructor*/ false,
1793 SystemDictionary::reflect_Method_klass(), THREAD);
1794 }
1795 JVM_END
1796
1797 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1798 {
1799 JVMWrapper("JVM_GetClassDeclaredConstructors");
1800 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1801 /*want_constructor*/ true,
1802 SystemDictionary::reflect_Constructor_klass(), THREAD);
1803 }
1804 JVM_END
1805
1806 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1807 {
1808 JVMWrapper("JVM_GetClassAccessFlags");
1809 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1810 // Primitive type
1811 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1812 }
1813
1814 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1815 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1816 }
1817 JVM_END
1818
1819 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1820 {
1821 JVMWrapper("JVM_AreNestMates");
1822 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1823 assert(c->is_instance_klass(), "must be");
1824 InstanceKlass* ck = InstanceKlass::cast(c);
1825 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1826 assert(m->is_instance_klass(), "must be");
1827 InstanceKlass* mk = InstanceKlass::cast(m);
1828 return ck->has_nestmate_access_to(mk, THREAD);
1829 }
1830 JVM_END
1831
1832 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1833 {
1834 // current is not a primitive or array class
1835 JVMWrapper("JVM_GetNestHost");
1836 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1837 assert(c->is_instance_klass(), "must be");
1838 InstanceKlass* ck = InstanceKlass::cast(c);
1839 // Don't post exceptions if validation fails
1840 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1841 return (jclass) (host == NULL ? NULL :
1842 JNIHandles::make_local(THREAD, host->java_mirror()));
1843 }
1844 JVM_END
1845
1846 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1847 {
1848 // current is not a primitive or array class
1849 JVMWrapper("JVM_GetNestMembers");
1850 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1851 assert(c->is_instance_klass(), "must be");
1852 InstanceKlass* ck = InstanceKlass::cast(c);
1853 // Get the nest host for this nest - throw ICCE if validation fails
1854 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1855 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1856
1857 {
1858 JvmtiVMObjectAllocEventCollector oam;
1859 Array<u2>* members = host->nest_members();
1860 int length = members == NULL ? 0 : members->length();
1861 // nest host is first in the array so make it one bigger
1862 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1863 length + 1, CHECK_NULL);
1864 objArrayHandle result (THREAD, r);
1865 result->obj_at_put(0, host->java_mirror());
1866 if (length != 0) {
1867 int i;
1868 for (i = 0; i < length; i++) {
1869 int cp_index = members->at(i);
1870 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1871 if (k->is_instance_klass()) {
1872 InstanceKlass* nest_host_k =
1873 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1874 if (nest_host_k == host) {
1875 result->obj_at_put(i+1, k->java_mirror());
1876 }
1877 else {
1878 // k's nest host is legal but it isn't our host so
1879 // throw ICCE
1880 ResourceMark rm(THREAD);
1881 Exceptions::fthrow(THREAD_AND_LOCATION,
1882 icce,
1883 "Nest member %s in %s declares a different nest host of %s",
1884 k->external_name(),
1885 host->external_name(),
1886 nest_host_k->external_name()
1887 );
1888 return NULL;
1889 }
1890 }
1891 else {
1892 // we have a bad nest member entry - throw ICCE
1893 ResourceMark rm(THREAD);
1894 Exceptions::fthrow(THREAD_AND_LOCATION,
1895 icce,
1896 "Class %s can not be a nest member of %s",
1897 k->external_name(),
1898 host->external_name()
1899 );
1900 return NULL;
1901 }
1902 }
1903 }
1904 else {
1905 assert(host == ck, "must be singleton nest");
1906 }
1907 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1908 }
1909 }
1910 JVM_END
1911
1912 // Constant pool access //////////////////////////////////////////////////////////
1913
1914 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1915 {
1916 JVMWrapper("JVM_GetClassConstantPool");
1917 JvmtiVMObjectAllocEventCollector oam;
1918
1919 // Return null for primitives and arrays
1920 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1921 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1922 if (k->is_instance_klass()) {
1923 InstanceKlass* k_h = InstanceKlass::cast(k);
1924 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1925 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1926 return JNIHandles::make_local(jcp());
1927 }
1928 }
1929 return NULL;
1930 }
1931 JVM_END
1932
1933
1934 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1935 {
1936 JVMWrapper("JVM_ConstantPoolGetSize");
1937 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1938 return cp->length();
1939 }
1940 JVM_END
1941
1942
1943 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1944 {
1945 JVMWrapper("JVM_ConstantPoolGetClassAt");
1946 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1947 bounds_check(cp, index, CHECK_NULL);
1948 constantTag tag = cp->tag_at(index);
1949 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1950 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1951 }
1952 Klass* k = cp->klass_at(index, CHECK_NULL);
1953 return (jclass) JNIHandles::make_local(k->java_mirror());
1954 }
1955 JVM_END
1956
1957 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1958 {
1959 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1960 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1961 bounds_check(cp, index, CHECK_NULL);
1962 constantTag tag = cp->tag_at(index);
1963 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1964 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1965 }
1966 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1967 if (k == NULL) return NULL;
1968 return (jclass) JNIHandles::make_local(k->java_mirror());
1969 }
1970 JVM_END
1971
1972 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1973 constantTag tag = cp->tag_at(index);
1974 if (!tag.is_method() && !tag.is_interface_method()) {
1975 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1976 }
1977 int klass_ref = cp->uncached_klass_ref_index_at(index);
1978 Klass* k_o;
1979 if (force_resolution) {
1980 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1981 } else {
1982 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1983 if (k_o == NULL) return NULL;
1984 }
1985 InstanceKlass* k = InstanceKlass::cast(k_o);
1986 Symbol* name = cp->uncached_name_ref_at(index);
1987 Symbol* sig = cp->uncached_signature_ref_at(index);
1988 methodHandle m (THREAD, k->find_method(name, sig));
1989 if (m.is_null()) {
1990 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1991 }
1992 oop method;
1993 if (!m->is_initializer() || m->is_static()) {
1994 method = Reflection::new_method(m, true, CHECK_NULL);
1995 } else {
1996 method = Reflection::new_constructor(m, CHECK_NULL);
1997 }
1998 return JNIHandles::make_local(method);
1999 }
2000
2001 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2002 {
2003 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2004 JvmtiVMObjectAllocEventCollector oam;
2005 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2006 bounds_check(cp, index, CHECK_NULL);
2007 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2008 return res;
2009 }
2010 JVM_END
2011
2012 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2013 {
2014 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2015 JvmtiVMObjectAllocEventCollector oam;
2016 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2017 bounds_check(cp, index, CHECK_NULL);
2018 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2019 return res;
2020 }
2021 JVM_END
2022
2023 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2024 constantTag tag = cp->tag_at(index);
2025 if (!tag.is_field()) {
2026 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2027 }
2028 int klass_ref = cp->uncached_klass_ref_index_at(index);
2029 Klass* k_o;
2030 if (force_resolution) {
2031 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2032 } else {
2033 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2034 if (k_o == NULL) return NULL;
2035 }
2036 InstanceKlass* k = InstanceKlass::cast(k_o);
2037 Symbol* name = cp->uncached_name_ref_at(index);
2038 Symbol* sig = cp->uncached_signature_ref_at(index);
2039 fieldDescriptor fd;
2040 Klass* target_klass = k->find_field(name, sig, &fd);
2041 if (target_klass == NULL) {
2042 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2043 }
2044 oop field = Reflection::new_field(&fd, CHECK_NULL);
2045 return JNIHandles::make_local(field);
2046 }
2047
2048 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2049 {
2050 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2051 JvmtiVMObjectAllocEventCollector oam;
2052 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2053 bounds_check(cp, index, CHECK_NULL);
2054 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2055 return res;
2056 }
2057 JVM_END
2058
2059 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2060 {
2061 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2062 JvmtiVMObjectAllocEventCollector oam;
2063 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2064 bounds_check(cp, index, CHECK_NULL);
2065 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2066 return res;
2067 }
2068 JVM_END
2069
2070 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2071 {
2072 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2073 JvmtiVMObjectAllocEventCollector oam;
2074 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2075 bounds_check(cp, index, CHECK_NULL);
2076 constantTag tag = cp->tag_at(index);
2077 if (!tag.is_field_or_method()) {
2078 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2079 }
2080 int klass_ref = cp->uncached_klass_ref_index_at(index);
2081 Symbol* klass_name = cp->klass_name_at(klass_ref);
2082 Symbol* member_name = cp->uncached_name_ref_at(index);
2083 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2084 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2085 objArrayHandle dest(THREAD, dest_o);
2086 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2087 dest->obj_at_put(0, str());
2088 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2089 dest->obj_at_put(1, str());
2090 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2091 dest->obj_at_put(2, str());
2092 return (jobjectArray) JNIHandles::make_local(dest());
2093 }
2094 JVM_END
2095
2096 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2097 {
2098 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2099 JvmtiVMObjectAllocEventCollector oam;
2100 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2101 bounds_check(cp, index, CHECK_0);
2102 constantTag tag = cp->tag_at(index);
2103 if (!tag.is_field_or_method()) {
2104 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2105 }
2106 return (jint) cp->uncached_klass_ref_index_at(index);
2107 }
2108 JVM_END
2109
2110 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2111 {
2112 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2113 JvmtiVMObjectAllocEventCollector oam;
2114 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2115 bounds_check(cp, index, CHECK_0);
2116 constantTag tag = cp->tag_at(index);
2117 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2118 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2119 }
2120 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2121 }
2122 JVM_END
2123
2124 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2125 {
2126 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2127 JvmtiVMObjectAllocEventCollector oam;
2128 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2129 bounds_check(cp, index, CHECK_NULL);
2130 constantTag tag = cp->tag_at(index);
2131 if (!tag.is_name_and_type()) {
2132 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2133 }
2134 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2135 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2136 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2137 objArrayHandle dest(THREAD, dest_o);
2138 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2139 dest->obj_at_put(0, str());
2140 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2141 dest->obj_at_put(1, str());
2142 return (jobjectArray) JNIHandles::make_local(dest());
2143 }
2144 JVM_END
2145
2146 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2147 {
2148 JVMWrapper("JVM_ConstantPoolGetIntAt");
2149 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2150 bounds_check(cp, index, CHECK_0);
2151 constantTag tag = cp->tag_at(index);
2152 if (!tag.is_int()) {
2153 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2154 }
2155 return cp->int_at(index);
2156 }
2157 JVM_END
2158
2159 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2160 {
2161 JVMWrapper("JVM_ConstantPoolGetLongAt");
2162 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2163 bounds_check(cp, index, CHECK_(0L));
2164 constantTag tag = cp->tag_at(index);
2165 if (!tag.is_long()) {
2166 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2167 }
2168 return cp->long_at(index);
2169 }
2170 JVM_END
2171
2172 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2173 {
2174 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2175 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2176 bounds_check(cp, index, CHECK_(0.0f));
2177 constantTag tag = cp->tag_at(index);
2178 if (!tag.is_float()) {
2179 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2180 }
2181 return cp->float_at(index);
2182 }
2183 JVM_END
2184
2185 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2186 {
2187 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2188 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2189 bounds_check(cp, index, CHECK_(0.0));
2190 constantTag tag = cp->tag_at(index);
2191 if (!tag.is_double()) {
2192 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2193 }
2194 return cp->double_at(index);
2195 }
2196 JVM_END
2197
2198 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2199 {
2200 JVMWrapper("JVM_ConstantPoolGetStringAt");
2201 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2202 bounds_check(cp, index, CHECK_NULL);
2203 constantTag tag = cp->tag_at(index);
2204 if (!tag.is_string()) {
2205 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2206 }
2207 oop str = cp->string_at(index, CHECK_NULL);
2208 return (jstring) JNIHandles::make_local(str);
2209 }
2210 JVM_END
2211
2212 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2213 {
2214 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2215 JvmtiVMObjectAllocEventCollector oam;
2216 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2217 bounds_check(cp, index, CHECK_NULL);
2218 constantTag tag = cp->tag_at(index);
2219 if (!tag.is_symbol()) {
2220 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2221 }
2222 Symbol* sym = cp->symbol_at(index);
2223 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2224 return (jstring) JNIHandles::make_local(str());
2225 }
2226 JVM_END
2227
2228 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2229 {
2230 JVMWrapper("JVM_ConstantPoolGetTagAt");
2231 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2232 bounds_check(cp, index, CHECK_0);
2233 constantTag tag = cp->tag_at(index);
2234 jbyte result = tag.value();
2235 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2236 // they are changed to the corresponding tags from the JVM spec, so that java code in
2237 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2238 if (tag.is_klass_or_reference()) {
2239 result = JVM_CONSTANT_Class;
2240 } else if (tag.is_string_index()) {
2241 result = JVM_CONSTANT_String;
2242 } else if (tag.is_method_type_in_error()) {
2243 result = JVM_CONSTANT_MethodType;
2244 } else if (tag.is_method_handle_in_error()) {
2245 result = JVM_CONSTANT_MethodHandle;
2246 } else if (tag.is_dynamic_constant_in_error()) {
2247 result = JVM_CONSTANT_Dynamic;
2248 }
2249 return result;
2250 }
2251 JVM_END
2252
2253 // Assertion support. //////////////////////////////////////////////////////////
2254
2255 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2256 JVMWrapper("JVM_DesiredAssertionStatus");
2257 assert(cls != NULL, "bad class");
2258
2259 oop r = JNIHandles::resolve(cls);
2260 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2261 if (java_lang_Class::is_primitive(r)) return false;
2262
2263 Klass* k = java_lang_Class::as_Klass(r);
2264 assert(k->is_instance_klass(), "must be an instance klass");
2265 if (!k->is_instance_klass()) return false;
2266
2267 ResourceMark rm(THREAD);
2268 const char* name = k->name()->as_C_string();
2269 bool system_class = k->class_loader() == NULL;
2270 return JavaAssertions::enabled(name, system_class);
2271
2272 JVM_END
2273
2274
2275 // Return a new AssertionStatusDirectives object with the fields filled in with
2276 // command-line assertion arguments (i.e., -ea, -da).
2277 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2278 JVMWrapper("JVM_AssertionStatusDirectives");
2279 JvmtiVMObjectAllocEventCollector oam;
2280 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2281 return JNIHandles::make_local(env, asd);
2282 JVM_END
2283
2284 // Verification ////////////////////////////////////////////////////////////////////////////////
2285
2286 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2287
2288 // RedefineClasses support: bug 6214132 caused verification to fail.
2289 // All functions from this section should call the jvmtiThreadSate function:
2290 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2291 // The function returns a Klass* of the _scratch_class if the verifier
2292 // was invoked in the middle of the class redefinition.
2293 // Otherwise it returns its argument value which is the _the_class Klass*.
2294 // Please, refer to the description in the jvmtiThreadSate.hpp.
2295
2296 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2297 JVMWrapper("JVM_GetClassNameUTF");
2298 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2299 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2300 return k->name()->as_utf8();
2301 JVM_END
2302
2303
2304 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2305 JVMWrapper("JVM_GetClassCPTypes");
2306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2307 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2308 // types will have length zero if this is not an InstanceKlass
2309 // (length is determined by call to JVM_GetClassCPEntriesCount)
2310 if (k->is_instance_klass()) {
2311 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2312 for (int index = cp->length() - 1; index >= 0; index--) {
2313 constantTag tag = cp->tag_at(index);
2314 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2315 }
2316 }
2317 JVM_END
2318
2319
2320 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2321 JVMWrapper("JVM_GetClassCPEntriesCount");
2322 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2323 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2324 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2325 JVM_END
2326
2327
2328 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2329 JVMWrapper("JVM_GetClassFieldsCount");
2330 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2331 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2332 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2333 JVM_END
2334
2335
2336 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2337 JVMWrapper("JVM_GetClassMethodsCount");
2338 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2339 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2340 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2341 JVM_END
2342
2343
2344 // The following methods, used for the verifier, are never called with
2345 // array klasses, so a direct cast to InstanceKlass is safe.
2346 // Typically, these methods are called in a loop with bounds determined
2347 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2348 // zero for arrays.
2349 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2350 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2351 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2352 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2353 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2354 int length = method->checked_exceptions_length();
2355 if (length > 0) {
2356 CheckedExceptionElement* table= method->checked_exceptions_start();
2357 for (int i = 0; i < length; i++) {
2358 exceptions[i] = table[i].class_cp_index;
2359 }
2360 }
2361 JVM_END
2362
2363
2364 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2365 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2366 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2367 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2368 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2369 return method->checked_exceptions_length();
2370 JVM_END
2371
2372
2373 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2374 JVMWrapper("JVM_GetMethodIxByteCode");
2375 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2376 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2377 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2378 memcpy(code, method->code_base(), method->code_size());
2379 JVM_END
2380
2381
2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2383 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2384 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2387 return method->code_size();
2388 JVM_END
2389
2390
2391 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2392 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2393 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2394 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2395 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2396 ExceptionTable extable(method);
2397 entry->start_pc = extable.start_pc(entry_index);
2398 entry->end_pc = extable.end_pc(entry_index);
2399 entry->handler_pc = extable.handler_pc(entry_index);
2400 entry->catchType = extable.catch_type_index(entry_index);
2401 JVM_END
2402
2403
2404 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2405 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2406 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2407 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2408 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2409 return method->exception_table_length();
2410 JVM_END
2411
2412
2413 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2414 JVMWrapper("JVM_GetMethodIxModifiers");
2415 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2416 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2417 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2418 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2419 JVM_END
2420
2421
2422 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2423 JVMWrapper("JVM_GetFieldIxModifiers");
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2427 JVM_END
2428
2429
2430 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2431 JVMWrapper("JVM_GetMethodIxLocalsCount");
2432 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2435 return method->max_locals();
2436 JVM_END
2437
2438
2439 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2440 JVMWrapper("JVM_GetMethodIxArgsSize");
2441 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2442 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2443 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2444 return method->size_of_parameters();
2445 JVM_END
2446
2447
2448 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2449 JVMWrapper("JVM_GetMethodIxMaxStack");
2450 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2451 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2452 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2453 return method->verifier_max_stack();
2454 JVM_END
2455
2456
2457 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2458 JVMWrapper("JVM_IsConstructorIx");
2459 ResourceMark rm(THREAD);
2460 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2461 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2462 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2463 return method->name() == vmSymbols::object_initializer_name();
2464 JVM_END
2465
2466
2467 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2468 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2469 ResourceMark rm(THREAD);
2470 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2471 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2472 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2473 return method->is_overpass();
2474 JVM_END
2475
2476 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2477 JVMWrapper("JVM_GetMethodIxIxUTF");
2478 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2479 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2480 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2481 return method->name()->as_utf8();
2482 JVM_END
2483
2484
2485 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2486 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2487 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2488 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2489 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2490 return method->signature()->as_utf8();
2491 JVM_END
2492
2493 /**
2494 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2495 * read entries in the constant pool. Since the old verifier always
2496 * works on a copy of the code, it will not see any rewriting that
2497 * may possibly occur in the middle of verification. So it is important
2498 * that nothing it calls tries to use the cpCache instead of the raw
2499 * constant pool, so we must use cp->uncached_x methods when appropriate.
2500 */
2501 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2502 JVMWrapper("JVM_GetCPFieldNameUTF");
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2506 switch (cp->tag_at(cp_index).value()) {
2507 case JVM_CONSTANT_Fieldref:
2508 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2509 default:
2510 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2511 }
2512 ShouldNotReachHere();
2513 return NULL;
2514 JVM_END
2515
2516
2517 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2518 JVMWrapper("JVM_GetCPMethodNameUTF");
2519 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2520 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2521 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2522 switch (cp->tag_at(cp_index).value()) {
2523 case JVM_CONSTANT_InterfaceMethodref:
2524 case JVM_CONSTANT_Methodref:
2525 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2526 default:
2527 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2528 }
2529 ShouldNotReachHere();
2530 return NULL;
2531 JVM_END
2532
2533
2534 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2535 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2536 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2537 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2538 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2539 switch (cp->tag_at(cp_index).value()) {
2540 case JVM_CONSTANT_InterfaceMethodref:
2541 case JVM_CONSTANT_Methodref:
2542 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2543 default:
2544 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2545 }
2546 ShouldNotReachHere();
2547 return NULL;
2548 JVM_END
2549
2550
2551 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2552 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2553 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2554 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2555 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2556 switch (cp->tag_at(cp_index).value()) {
2557 case JVM_CONSTANT_Fieldref:
2558 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2559 default:
2560 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2561 }
2562 ShouldNotReachHere();
2563 return NULL;
2564 JVM_END
2565
2566
2567 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2568 JVMWrapper("JVM_GetCPClassNameUTF");
2569 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2570 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2571 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2572 Symbol* classname = cp->klass_name_at(cp_index);
2573 return classname->as_utf8();
2574 JVM_END
2575
2576
2577 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2578 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2579 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2580 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2581 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2582 switch (cp->tag_at(cp_index).value()) {
2583 case JVM_CONSTANT_Fieldref: {
2584 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2585 Symbol* classname = cp->klass_name_at(class_index);
2586 return classname->as_utf8();
2587 }
2588 default:
2589 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2590 }
2591 ShouldNotReachHere();
2592 return NULL;
2593 JVM_END
2594
2595
2596 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2597 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2598 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2599 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2600 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2601 switch (cp->tag_at(cp_index).value()) {
2602 case JVM_CONSTANT_Methodref:
2603 case JVM_CONSTANT_InterfaceMethodref: {
2604 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2605 Symbol* classname = cp->klass_name_at(class_index);
2606 return classname->as_utf8();
2607 }
2608 default:
2609 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2610 }
2611 ShouldNotReachHere();
2612 return NULL;
2613 JVM_END
2614
2615
2616 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2617 JVMWrapper("JVM_GetCPFieldModifiers");
2618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2619 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2620 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2621 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2622 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2623 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2624 switch (cp->tag_at(cp_index).value()) {
2625 case JVM_CONSTANT_Fieldref: {
2626 Symbol* name = cp->uncached_name_ref_at(cp_index);
2627 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2628 InstanceKlass* ik = InstanceKlass::cast(k_called);
2629 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2630 if (fs.name() == name && fs.signature() == signature) {
2631 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2632 }
2633 }
2634 return -1;
2635 }
2636 default:
2637 fatal("JVM_GetCPFieldModifiers: illegal constant");
2638 }
2639 ShouldNotReachHere();
2640 return 0;
2641 JVM_END
2642
2643
2644 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2645 JVMWrapper("JVM_GetCPMethodModifiers");
2646 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2647 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2648 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2649 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2650 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2651 switch (cp->tag_at(cp_index).value()) {
2652 case JVM_CONSTANT_Methodref:
2653 case JVM_CONSTANT_InterfaceMethodref: {
2654 Symbol* name = cp->uncached_name_ref_at(cp_index);
2655 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2656 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2657 int methods_count = methods->length();
2658 for (int i = 0; i < methods_count; i++) {
2659 Method* method = methods->at(i);
2660 if (method->name() == name && method->signature() == signature) {
2661 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2662 }
2663 }
2664 return -1;
2665 }
2666 default:
2667 fatal("JVM_GetCPMethodModifiers: illegal constant");
2668 }
2669 ShouldNotReachHere();
2670 return 0;
2671 JVM_END
2672
2673
2674 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2675
2676 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2677 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2678 JVM_END
2679
2680
2681 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2682 JVMWrapper("JVM_IsSameClassPackage");
2683 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2684 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2685 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2686 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2687 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2688 JVM_END
2689
2690 // Printing support //////////////////////////////////////////////////
2691 extern "C" {
2692
2693 ATTRIBUTE_PRINTF(3, 0)
2694 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2695 // Reject count values that are negative signed values converted to
2696 // unsigned; see bug 4399518, 4417214
2697 if ((intptr_t)count <= 0) return -1;
2698
2699 int result = os::vsnprintf(str, count, fmt, args);
2700 if (result > 0 && (size_t)result >= count) {
2701 result = -1;
2702 }
2703
2704 return result;
2705 }
2706
2707 ATTRIBUTE_PRINTF(3, 4)
2708 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2709 va_list args;
2710 int len;
2711 va_start(args, fmt);
2712 len = jio_vsnprintf(str, count, fmt, args);
2713 va_end(args);
2714 return len;
2715 }
2716
2717 ATTRIBUTE_PRINTF(2, 3)
2718 int jio_fprintf(FILE* f, const char *fmt, ...) {
2719 int len;
2720 va_list args;
2721 va_start(args, fmt);
2722 len = jio_vfprintf(f, fmt, args);
2723 va_end(args);
2724 return len;
2725 }
2726
2727 ATTRIBUTE_PRINTF(2, 0)
2728 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2729 if (Arguments::vfprintf_hook() != NULL) {
2730 return Arguments::vfprintf_hook()(f, fmt, args);
2731 } else {
2732 return vfprintf(f, fmt, args);
2733 }
2734 }
2735
2736 ATTRIBUTE_PRINTF(1, 2)
2737 JNIEXPORT int jio_printf(const char *fmt, ...) {
2738 int len;
2739 va_list args;
2740 va_start(args, fmt);
2741 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2742 va_end(args);
2743 return len;
2744 }
2745
2746 // HotSpot specific jio method
2747 void jio_print(const char* s, size_t len) {
2748 // Try to make this function as atomic as possible.
2749 if (Arguments::vfprintf_hook() != NULL) {
2750 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2751 } else {
2752 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2753 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2754 }
2755 }
2756
2757 } // Extern C
2758
2759 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2760
2761 // In most of the JVM thread support functions we need to access the
2762 // thread through a ThreadsListHandle to prevent it from exiting and
2763 // being reclaimed while we try to operate on it. The exceptions to this
2764 // rule are when operating on the current thread, or if the monitor of
2765 // the target java.lang.Thread is locked at the Java level - in both
2766 // cases the target cannot exit.
2767
2768 static void thread_entry(JavaThread* thread, TRAPS) {
2769 HandleMark hm(THREAD);
2770 Handle obj(THREAD, thread->threadObj());
2771 JavaValue result(T_VOID);
2772 JavaCalls::call_virtual(&result,
2773 obj,
2774 SystemDictionary::Thread_klass(),
2775 vmSymbols::run_method_name(),
2776 vmSymbols::void_method_signature(),
2777 THREAD);
2778 }
2779
2780
2781 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2782 JVMWrapper("JVM_StartThread");
2783 JavaThread *native_thread = NULL;
2784
2785 // We cannot hold the Threads_lock when we throw an exception,
2786 // due to rank ordering issues. Example: we might need to grab the
2787 // Heap_lock while we construct the exception.
2788 bool throw_illegal_thread_state = false;
2789
2790 // We must release the Threads_lock before we can post a jvmti event
2791 // in Thread::start.
2792 {
2793 // Ensure that the C++ Thread and OSThread structures aren't freed before
2794 // we operate.
2795 MutexLocker mu(Threads_lock);
2796
2797 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2798 // re-starting an already started thread, so we should usually find
2799 // that the JavaThread is null. However for a JNI attached thread
2800 // there is a small window between the Thread object being created
2801 // (with its JavaThread set) and the update to its threadStatus, so we
2802 // have to check for this
2803 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2804 throw_illegal_thread_state = true;
2805 } else {
2806 // We could also check the stillborn flag to see if this thread was already stopped, but
2807 // for historical reasons we let the thread detect that itself when it starts running
2808
2809 jlong size =
2810 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2811 // Allocate the C++ Thread structure and create the native thread. The
2812 // stack size retrieved from java is 64-bit signed, but the constructor takes
2813 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2814 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2815 // - Avoid passing negative values which would result in really large stacks.
2816 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2817 size_t sz = size > 0 ? (size_t) size : 0;
2818 native_thread = new JavaThread(&thread_entry, sz);
2819
2820 // At this point it may be possible that no osthread was created for the
2821 // JavaThread due to lack of memory. Check for this situation and throw
2822 // an exception if necessary. Eventually we may want to change this so
2823 // that we only grab the lock if the thread was created successfully -
2824 // then we can also do this check and throw the exception in the
2825 // JavaThread constructor.
2826 if (native_thread->osthread() != NULL) {
2827 // Note: the current thread is not being used within "prepare".
2828 native_thread->prepare(jthread);
2829 }
2830 }
2831 }
2832
2833 if (throw_illegal_thread_state) {
2834 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2835 }
2836
2837 assert(native_thread != NULL, "Starting null thread?");
2838
2839 if (native_thread->osthread() == NULL) {
2840 // No one should hold a reference to the 'native_thread'.
2841 native_thread->smr_delete();
2842 if (JvmtiExport::should_post_resource_exhausted()) {
2843 JvmtiExport::post_resource_exhausted(
2844 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2845 os::native_thread_creation_failed_msg());
2846 }
2847 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2848 os::native_thread_creation_failed_msg());
2849 }
2850
2851 Thread::start(native_thread);
2852
2853 JVM_END
2854
2855
2856 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2857 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2858 // but is thought to be reliable and simple. In the case, where the receiver is the
2859 // same thread as the sender, no VM_Operation is needed.
2860 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2861 JVMWrapper("JVM_StopThread");
2862
2863 // A nested ThreadsListHandle will grab the Threads_lock so create
2864 // tlh before we resolve throwable.
2865 ThreadsListHandle tlh(thread);
2866 oop java_throwable = JNIHandles::resolve(throwable);
2867 if (java_throwable == NULL) {
2868 THROW(vmSymbols::java_lang_NullPointerException());
2869 }
2870 oop java_thread = NULL;
2871 JavaThread* receiver = NULL;
2872 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2873 Events::log_exception(thread,
2874 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2875 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2876
2877 if (is_alive) {
2878 // jthread refers to a live JavaThread.
2879 if (thread == receiver) {
2880 // Exception is getting thrown at self so no VM_Operation needed.
2881 THROW_OOP(java_throwable);
2882 } else {
2883 // Use a VM_Operation to throw the exception.
2884 Thread::send_async_exception(java_thread, java_throwable);
2885 }
2886 } else {
2887 // Either:
2888 // - target thread has not been started before being stopped, or
2889 // - target thread already terminated
2890 // We could read the threadStatus to determine which case it is
2891 // but that is overkill as it doesn't matter. We must set the
2892 // stillborn flag for the first case, and if the thread has already
2893 // exited setting this flag has no effect.
2894 java_lang_Thread::set_stillborn(java_thread);
2895 }
2896 JVM_END
2897
2898
2899 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2900 JVMWrapper("JVM_IsThreadAlive");
2901
2902 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2903 return java_lang_Thread::is_alive(thread_oop);
2904 JVM_END
2905
2906
2907 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2908 JVMWrapper("JVM_SuspendThread");
2909
2910 ThreadsListHandle tlh(thread);
2911 JavaThread* receiver = NULL;
2912 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2913 if (is_alive) {
2914 // jthread refers to a live JavaThread.
2915 {
2916 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2917 if (receiver->is_external_suspend()) {
2918 // Don't allow nested external suspend requests. We can't return
2919 // an error from this interface so just ignore the problem.
2920 return;
2921 }
2922 if (receiver->is_exiting()) { // thread is in the process of exiting
2923 return;
2924 }
2925 receiver->set_external_suspend();
2926 }
2927
2928 // java_suspend() will catch threads in the process of exiting
2929 // and will ignore them.
2930 receiver->java_suspend();
2931
2932 // It would be nice to have the following assertion in all the
2933 // time, but it is possible for a racing resume request to have
2934 // resumed this thread right after we suspended it. Temporarily
2935 // enable this assertion if you are chasing a different kind of
2936 // bug.
2937 //
2938 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2939 // receiver->is_being_ext_suspended(), "thread is not suspended");
2940 }
2941 JVM_END
2942
2943
2944 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2945 JVMWrapper("JVM_ResumeThread");
2946
2947 ThreadsListHandle tlh(thread);
2948 JavaThread* receiver = NULL;
2949 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2950 if (is_alive) {
2951 // jthread refers to a live JavaThread.
2952
2953 // This is the original comment for this Threads_lock grab:
2954 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2955 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2956 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2957 // looks at it.
2958 //
2959 // The above comment dates back to when we had both internal and
2960 // external suspend APIs that shared a common underlying mechanism.
2961 // External suspend is now entirely cooperative and doesn't share
2962 // anything with internal suspend. That said, there are some
2963 // assumptions in the VM that an external resume grabs the
2964 // Threads_lock. We can't drop the Threads_lock grab here until we
2965 // resolve the assumptions that exist elsewhere.
2966 //
2967 MutexLocker ml(Threads_lock);
2968 receiver->java_resume();
2969 }
2970 JVM_END
2971
2972
2973 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2974 JVMWrapper("JVM_SetThreadPriority");
2975
2976 ThreadsListHandle tlh(thread);
2977 oop java_thread = NULL;
2978 JavaThread* receiver = NULL;
2979 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2980 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2981
2982 if (is_alive) {
2983 // jthread refers to a live JavaThread.
2984 Thread::set_priority(receiver, (ThreadPriority)prio);
2985 }
2986 // Implied else: If the JavaThread hasn't started yet, then the
2987 // priority set in the java.lang.Thread object above will be pushed
2988 // down when it does start.
2989 JVM_END
2990
2991
2992 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2993 JVMWrapper("JVM_Yield");
2994 if (os::dont_yield()) return;
2995 HOTSPOT_THREAD_YIELD();
2996 os::naked_yield();
2997 JVM_END
2998
2999 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3000 assert(event != NULL, "invariant");
3001 assert(event->should_commit(), "invariant");
3002 event->set_time(millis);
3003 event->commit();
3004 }
3005
3006 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3007 JVMWrapper("JVM_Sleep");
3008
3009 if (millis < 0) {
3010 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3011 }
3012
3013 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3014 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3015 }
3016
3017 // Save current thread state and restore it at the end of this block.
3018 // And set new thread state to SLEEPING.
3019 JavaThreadSleepState jtss(thread);
3020
3021 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3022 EventThreadSleep event;
3023
3024 if (millis == 0) {
3025 os::naked_yield();
3026 } else {
3027 ThreadState old_state = thread->osthread()->get_state();
3028 thread->osthread()->set_state(SLEEPING);
3029 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3030 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3031 // us while we were sleeping. We do not overwrite those.
3032 if (!HAS_PENDING_EXCEPTION) {
3033 if (event.should_commit()) {
3034 post_thread_sleep_event(&event, millis);
3035 }
3036 HOTSPOT_THREAD_SLEEP_END(1);
3037
3038 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3039 // to properly restore the thread state. That's likely wrong.
3040 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3041 }
3042 }
3043 thread->osthread()->set_state(old_state);
3044 }
3045 if (event.should_commit()) {
3046 post_thread_sleep_event(&event, millis);
3047 }
3048 HOTSPOT_THREAD_SLEEP_END(0);
3049 JVM_END
3050
3051 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3052 JVMWrapper("JVM_CurrentThread");
3053 oop jthread = thread->threadObj();
3054 assert (thread != NULL, "no current thread!");
3055 return JNIHandles::make_local(env, jthread);
3056 JVM_END
3057
3058
3059 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3060 JVMWrapper("JVM_CountStackFrames");
3061
3062 uint32_t debug_bits = 0;
3063 ThreadsListHandle tlh(thread);
3064 JavaThread* receiver = NULL;
3065 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3066 int count = 0;
3067 if (is_alive) {
3068 // jthread refers to a live JavaThread.
3069 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3070 // Count all java activation, i.e., number of vframes.
3071 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3072 // Native frames are not counted.
3073 if (!vfst.method()->is_native()) count++;
3074 }
3075 } else {
3076 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3077 "this thread is not suspended");
3078 }
3079 }
3080 // Implied else: if JavaThread is not alive simply return a count of 0.
3081
3082 return count;
3083 JVM_END
3084
3085
3086 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3087 JVMWrapper("JVM_Interrupt");
3088
3089 ThreadsListHandle tlh(thread);
3090 JavaThread* receiver = NULL;
3091 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3092 if (is_alive) {
3093 // jthread refers to a live JavaThread.
3094 Thread::interrupt(receiver);
3095 }
3096 JVM_END
3097
3098
3099 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3100 JVMWrapper("JVM_IsInterrupted");
3101
3102 ThreadsListHandle tlh(thread);
3103 JavaThread* receiver = NULL;
3104 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3105 if (is_alive) {
3106 // jthread refers to a live JavaThread.
3107 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3108 } else {
3109 return JNI_FALSE;
3110 }
3111 JVM_END
3112
3113
3114 // Return true iff the current thread has locked the object passed in
3115
3116 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3117 JVMWrapper("JVM_HoldsLock");
3118 assert(THREAD->is_Java_thread(), "sanity check");
3119 if (obj == NULL) {
3120 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3121 }
3122 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3123 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3124 JVM_END
3125
3126
3127 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3128 JVMWrapper("JVM_DumpAllStacks");
3129 VM_PrintThreads op;
3130 VMThread::execute(&op);
3131 if (JvmtiExport::should_post_data_dump()) {
3132 JvmtiExport::post_data_dump();
3133 }
3134 JVM_END
3135
3136 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3137 JVMWrapper("JVM_SetNativeThreadName");
3138
3139 // We don't use a ThreadsListHandle here because the current thread
3140 // must be alive.
3141 oop java_thread = JNIHandles::resolve_non_null(jthread);
3142 JavaThread* thr = java_lang_Thread::thread(java_thread);
3143 if (thread == thr && !thr->has_attached_via_jni()) {
3144 // Thread naming is only supported for the current thread and
3145 // we don't set the name of an attached thread to avoid stepping
3146 // on other programs.
3147 ResourceMark rm(thread);
3148 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3149 os::set_native_thread_name(thread_name);
3150 }
3151 JVM_END
3152
3153 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3154
3155 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3156 JVMWrapper("JVM_GetClassContext");
3157 ResourceMark rm(THREAD);
3158 JvmtiVMObjectAllocEventCollector oam;
3159 vframeStream vfst(thread);
3160
3161 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3162 // This must only be called from SecurityManager.getClassContext
3163 Method* m = vfst.method();
3164 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3165 m->name() == vmSymbols::getClassContext_name() &&
3166 m->signature() == vmSymbols::void_class_array_signature())) {
3167 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3168 }
3169 }
3170
3171 // Collect method holders
3172 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3173 for (; !vfst.at_end(); vfst.security_next()) {
3174 Method* m = vfst.method();
3175 // Native frames are not returned
3176 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3177 Klass* holder = m->method_holder();
3178 assert(holder->is_klass(), "just checking");
3179 klass_array->append(holder);
3180 }
3181 }
3182
3183 // Create result array of type [Ljava/lang/Class;
3184 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3185 // Fill in mirrors corresponding to method holders
3186 for (int i = 0; i < klass_array->length(); i++) {
3187 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3188 }
3189
3190 return (jobjectArray) JNIHandles::make_local(env, result);
3191 JVM_END
3192
3193
3194 // java.lang.Package ////////////////////////////////////////////////////////////////
3195
3196
3197 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3198 JVMWrapper("JVM_GetSystemPackage");
3199 ResourceMark rm(THREAD);
3200 JvmtiVMObjectAllocEventCollector oam;
3201 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3202 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3203 return (jstring) JNIHandles::make_local(result);
3204 JVM_END
3205
3206
3207 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3208 JVMWrapper("JVM_GetSystemPackages");
3209 JvmtiVMObjectAllocEventCollector oam;
3210 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3211 return (jobjectArray) JNIHandles::make_local(result);
3212 JVM_END
3213
3214
3215 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3216
3217
3218 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3219 JVMWrapper("JVM_GetAndClearReferencePendingList");
3220
3221 MonitorLockerEx ml(Heap_lock);
3222 oop ref = Universe::reference_pending_list();
3223 if (ref != NULL) {
3224 Universe::set_reference_pending_list(NULL);
3225 }
3226 return JNIHandles::make_local(env, ref);
3227 JVM_END
3228
3229 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3230 JVMWrapper("JVM_HasReferencePendingList");
3231 MonitorLockerEx ml(Heap_lock);
3232 return Universe::has_reference_pending_list();
3233 JVM_END
3234
3235 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3236 JVMWrapper("JVM_WaitForReferencePendingList");
3237 MonitorLockerEx ml(Heap_lock);
3238 while (!Universe::has_reference_pending_list()) {
3239 ml.wait();
3240 }
3241 JVM_END
3242
3243
3244 // ObjectInputStream ///////////////////////////////////////////////////////////////
3245
3246 // Return the first user-defined class loader up the execution stack, or null
3247 // if only code from the bootstrap or platform class loader is on the stack.
3248
3249 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3250 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3251 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3252 oop loader = vfst.method()->method_holder()->class_loader();
3253 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3254 return JNIHandles::make_local(env, loader);
3255 }
3256 }
3257 return NULL;
3258 JVM_END
3259
3260
3261 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3262
3263
3264 // resolve array handle and check arguments
3265 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3266 if (arr == NULL) {
3267 THROW_0(vmSymbols::java_lang_NullPointerException());
3268 }
3269 oop a = JNIHandles::resolve_non_null(arr);
3270 if (!a->is_array()) {
3271 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3272 } else if (type_array_only && !a->is_typeArray()) {
3273 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3274 }
3275 return arrayOop(a);
3276 }
3277
3278
3279 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3280 JVMWrapper("JVM_GetArrayLength");
3281 arrayOop a = check_array(env, arr, false, CHECK_0);
3282 return a->length();
3283 JVM_END
3284
3285
3286 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3287 JVMWrapper("JVM_Array_Get");
3288 JvmtiVMObjectAllocEventCollector oam;
3289 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3290 jvalue value;
3291 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3292 oop box = Reflection::box(&value, type, CHECK_NULL);
3293 return JNIHandles::make_local(env, box);
3294 JVM_END
3295
3296
3297 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3298 JVMWrapper("JVM_GetPrimitiveArrayElement");
3299 jvalue value;
3300 value.i = 0; // to initialize value before getting used in CHECK
3301 arrayOop a = check_array(env, arr, true, CHECK_(value));
3302 assert(a->is_typeArray(), "just checking");
3303 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3304 BasicType wide_type = (BasicType) wCode;
3305 if (type != wide_type) {
3306 Reflection::widen(&value, type, wide_type, CHECK_(value));
3307 }
3308 return value;
3309 JVM_END
3310
3311
3312 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3313 JVMWrapper("JVM_SetArrayElement");
3314 arrayOop a = check_array(env, arr, false, CHECK);
3315 oop box = JNIHandles::resolve(val);
3316 jvalue value;
3317 value.i = 0; // to initialize value before getting used in CHECK
3318 BasicType value_type;
3319 if (a->is_objArray()) {
3320 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3321 value_type = Reflection::unbox_for_regular_object(box, &value);
3322 } else {
3323 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3324 }
3325 Reflection::array_set(&value, a, index, value_type, CHECK);
3326 JVM_END
3327
3328
3329 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3330 JVMWrapper("JVM_SetPrimitiveArrayElement");
3331 arrayOop a = check_array(env, arr, true, CHECK);
3332 assert(a->is_typeArray(), "just checking");
3333 BasicType value_type = (BasicType) vCode;
3334 Reflection::array_set(&v, a, index, value_type, CHECK);
3335 JVM_END
3336
3337
3338 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3339 JVMWrapper("JVM_NewArray");
3340 JvmtiVMObjectAllocEventCollector oam;
3341 oop element_mirror = JNIHandles::resolve(eltClass);
3342 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3343 return JNIHandles::make_local(env, result);
3344 JVM_END
3345
3346
3347 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3348 JVMWrapper("JVM_NewMultiArray");
3349 JvmtiVMObjectAllocEventCollector oam;
3350 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3351 oop element_mirror = JNIHandles::resolve(eltClass);
3352 assert(dim_array->is_typeArray(), "just checking");
3353 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3354 return JNIHandles::make_local(env, result);
3355 JVM_END
3356
3357
3358 // Library support ///////////////////////////////////////////////////////////////////////////
3359
3360 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3361 //%note jvm_ct
3362 JVMWrapper("JVM_LoadLibrary");
3363 char ebuf[1024];
3364 void *load_result;
3365 {
3366 ThreadToNativeFromVM ttnfvm(thread);
3367 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3368 }
3369 if (load_result == NULL) {
3370 char msg[1024];
3371 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3372 // Since 'ebuf' may contain a string encoded using
3373 // platform encoding scheme, we need to pass
3374 // Exceptions::unsafe_to_utf8 to the new_exception method
3375 // as the last argument. See bug 6367357.
3376 Handle h_exception =
3377 Exceptions::new_exception(thread,
3378 vmSymbols::java_lang_UnsatisfiedLinkError(),
3379 msg, Exceptions::unsafe_to_utf8);
3380
3381 THROW_HANDLE_0(h_exception);
3382 }
3383 return load_result;
3384 JVM_END
3385
3386
3387 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3388 JVMWrapper("JVM_UnloadLibrary");
3389 os::dll_unload(handle);
3390 JVM_END
3391
3392
3393 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3394 JVMWrapper("JVM_FindLibraryEntry");
3395 return os::dll_lookup(handle, name);
3396 JVM_END
3397
3398
3399 // JNI version ///////////////////////////////////////////////////////////////////////////////
3400
3401 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3402 JVMWrapper("JVM_IsSupportedJNIVersion");
3403 return Threads::is_supported_jni_version_including_1_1(version);
3404 JVM_END
3405
3406
3407 // String support ///////////////////////////////////////////////////////////////////////////
3408
3409 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3410 JVMWrapper("JVM_InternString");
3411 JvmtiVMObjectAllocEventCollector oam;
3412 if (str == NULL) return NULL;
3413 oop string = JNIHandles::resolve_non_null(str);
3414 oop result = StringTable::intern(string, CHECK_NULL);
3415 return (jstring) JNIHandles::make_local(env, result);
3416 JVM_END
3417
3418
3419 // Raw monitor support //////////////////////////////////////////////////////////////////////
3420
3421 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3422 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3423 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3424 // that only works with java threads.
3425
3426
3427 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3428 VM_Exit::block_if_vm_exited();
3429 JVMWrapper("JVM_RawMonitorCreate");
3430 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3431 }
3432
3433
3434 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3435 VM_Exit::block_if_vm_exited();
3436 JVMWrapper("JVM_RawMonitorDestroy");
3437 delete ((Mutex*) mon);
3438 }
3439
3440
3441 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3442 VM_Exit::block_if_vm_exited();
3443 JVMWrapper("JVM_RawMonitorEnter");
3444 ((Mutex*) mon)->jvm_raw_lock();
3445 return 0;
3446 }
3447
3448
3449 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3450 VM_Exit::block_if_vm_exited();
3451 JVMWrapper("JVM_RawMonitorExit");
3452 ((Mutex*) mon)->jvm_raw_unlock();
3453 }
3454
3455
3456 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3457
3458 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3459 Handle loader, Handle protection_domain,
3460 jboolean throwError, TRAPS) {
3461 // Security Note:
3462 // The Java level wrapper will perform the necessary security check allowing
3463 // us to pass the NULL as the initiating class loader. The VM is responsible for
3464 // the checkPackageAccess relative to the initiating class loader via the
3465 // protection_domain. The protection_domain is passed as NULL by the java code
3466 // if there is no security manager in 3-arg Class.forName().
3467 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3468
3469 // Check if we should initialize the class
3470 if (init && klass->is_instance_klass()) {
3471 klass->initialize(CHECK_NULL);
3472 }
3473 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3474 }
3475
3476
3477 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3478
3479 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3480 JVMWrapper("JVM_InvokeMethod");
3481 Handle method_handle;
3482 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3483 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3484 Handle receiver(THREAD, JNIHandles::resolve(obj));
3485 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3486 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3487 jobject res = JNIHandles::make_local(env, result);
3488 if (JvmtiExport::should_post_vm_object_alloc()) {
3489 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3490 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3491 if (java_lang_Class::is_primitive(ret_type)) {
3492 // Only for primitive type vm allocates memory for java object.
3493 // See box() method.
3494 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3495 }
3496 }
3497 return res;
3498 } else {
3499 THROW_0(vmSymbols::java_lang_StackOverflowError());
3500 }
3501 JVM_END
3502
3503
3504 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3505 JVMWrapper("JVM_NewInstanceFromConstructor");
3506 oop constructor_mirror = JNIHandles::resolve(c);
3507 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3508 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3509 jobject res = JNIHandles::make_local(env, result);
3510 if (JvmtiExport::should_post_vm_object_alloc()) {
3511 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3512 }
3513 return res;
3514 JVM_END
3515
3516 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3517
3518 JVM_LEAF(jboolean, JVM_SupportsCX8())
3519 JVMWrapper("JVM_SupportsCX8");
3520 return VM_Version::supports_cx8();
3521 JVM_END
3522
3523 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3524 JVMWrapper("JVM_InitializeFromArchive");
3525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3526 assert(k->is_klass(), "just checking");
3527 HeapShared::initialize_from_archived_subgraph(k);
3528 JVM_END
3529
3530 // Returns an array of all live Thread objects (VM internal JavaThreads,
3531 // jvmti agent threads, and JNI attaching threads are skipped)
3532 // See CR 6404306 regarding JNI attaching threads
3533 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3534 ResourceMark rm(THREAD);
3535 ThreadsListEnumerator tle(THREAD, false, false);
3536 JvmtiVMObjectAllocEventCollector oam;
3537
3538 int num_threads = tle.num_threads();
3539 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3540 objArrayHandle threads_ah(THREAD, r);
3541
3542 for (int i = 0; i < num_threads; i++) {
3543 Handle h = tle.get_threadObj(i);
3544 threads_ah->obj_at_put(i, h());
3545 }
3546
3547 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3548 JVM_END
3549
3550
3551 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3552 // Return StackTraceElement[][], each element is the stack trace of a thread in
3553 // the corresponding entry in the given threads array
3554 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3555 JVMWrapper("JVM_DumpThreads");
3556 JvmtiVMObjectAllocEventCollector oam;
3557
3558 // Check if threads is null
3559 if (threads == NULL) {
3560 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3561 }
3562
3563 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3564 objArrayHandle ah(THREAD, a);
3565 int num_threads = ah->length();
3566 // check if threads is non-empty array
3567 if (num_threads == 0) {
3568 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3569 }
3570
3571 // check if threads is not an array of objects of Thread class
3572 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3573 if (k != SystemDictionary::Thread_klass()) {
3574 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3575 }
3576
3577 ResourceMark rm(THREAD);
3578
3579 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3580 for (int i = 0; i < num_threads; i++) {
3581 oop thread_obj = ah->obj_at(i);
3582 instanceHandle h(THREAD, (instanceOop) thread_obj);
3583 thread_handle_array->append(h);
3584 }
3585
3586 // The JavaThread references in thread_handle_array are validated
3587 // in VM_ThreadDump::doit().
3588 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3589 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3590
3591 JVM_END
3592
3593 // JVM monitoring and management support
3594 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3595 return Management::get_jmm_interface(version);
3596 JVM_END
3597
3598 // com.sun.tools.attach.VirtualMachine agent properties support
3599 //
3600 // Initialize the agent properties with the properties maintained in the VM
3601 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3602 JVMWrapper("JVM_InitAgentProperties");
3603 ResourceMark rm;
3604
3605 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3606
3607 PUTPROP(props, "sun.java.command", Arguments::java_command());
3608 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3609 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3610 return properties;
3611 JVM_END
3612
3613 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3614 {
3615 JVMWrapper("JVM_GetEnclosingMethodInfo");
3616 JvmtiVMObjectAllocEventCollector oam;
3617
3618 if (ofClass == NULL) {
3619 return NULL;
3620 }
3621 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3622 // Special handling for primitive objects
3623 if (java_lang_Class::is_primitive(mirror())) {
3624 return NULL;
3625 }
3626 Klass* k = java_lang_Class::as_Klass(mirror());
3627 if (!k->is_instance_klass()) {
3628 return NULL;
3629 }
3630 InstanceKlass* ik = InstanceKlass::cast(k);
3631 int encl_method_class_idx = ik->enclosing_method_class_index();
3632 if (encl_method_class_idx == 0) {
3633 return NULL;
3634 }
3635 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3636 objArrayHandle dest(THREAD, dest_o);
3637 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3638 dest->obj_at_put(0, enc_k->java_mirror());
3639 int encl_method_method_idx = ik->enclosing_method_method_index();
3640 if (encl_method_method_idx != 0) {
3641 Symbol* sym = ik->constants()->symbol_at(
3642 extract_low_short_from_int(
3643 ik->constants()->name_and_type_at(encl_method_method_idx)));
3644 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3645 dest->obj_at_put(1, str());
3646 sym = ik->constants()->symbol_at(
3647 extract_high_short_from_int(
3648 ik->constants()->name_and_type_at(encl_method_method_idx)));
3649 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3650 dest->obj_at_put(2, str());
3651 }
3652 return (jobjectArray) JNIHandles::make_local(dest());
3653 }
3654 JVM_END
3655
3656 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3657 {
3658 memset(info, 0, info_size);
3659
3660 info->jvm_version = VM_Version::jvm_version();
3661 info->patch_version = VM_Version::vm_patch_version();
3662
3663 // when we add a new capability in the jvm_version_info struct, we should also
3664 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3665 // counter defined in runtimeService.cpp.
3666 info->is_attach_supported = AttachListener::is_attach_supported();
3667 }
3668 JVM_END
3669
3670 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3671 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3672 ResourceMark rm(THREAD);
3673
3674 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3675 return NULL;
3676 }
3677
3678 char** vm_flags = Arguments::jvm_flags_array();
3679 char** vm_args = Arguments::jvm_args_array();
3680 int num_flags = Arguments::num_jvm_flags();
3681 int num_args = Arguments::num_jvm_args();
3682
3683 InstanceKlass* ik = SystemDictionary::String_klass();
3684 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3685 objArrayHandle result_h(THREAD, r);
3686
3687 int index = 0;
3688 for (int j = 0; j < num_flags; j++, index++) {
3689 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3690 result_h->obj_at_put(index, h());
3691 }
3692 for (int i = 0; i < num_args; i++, index++) {
3693 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3694 result_h->obj_at_put(index, h());
3695 }
3696 return (jobjectArray) JNIHandles::make_local(env, result_h());
3697 JVM_END
3698
3699 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3700 return os::get_signal_number(name);
3701 JVM_END