1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/javaAssertions.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/stringTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/vmSymbols.hpp"
38 #include "gc/shared/collectedHeap.inline.hpp"
39 #include "interpreter/bytecode.hpp"
40 #include "jfr/jfrEvents.hpp"
41 #include "logging/log.hpp"
42 #include "memory/heapShared.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/referenceType.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/access.inline.hpp"
48 #include "oops/constantPool.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/method.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/valueArrayKlass.hpp"
56 #include "prims/jvm_misc.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/jvmtiThreadState.hpp"
59 #include "prims/nativeLookup.hpp"
60 #include "prims/stackwalk.hpp"
61 #include "runtime/arguments.hpp"
62 #include "runtime/atomic.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/init.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/deoptimization.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jfieldIDWorkaround.hpp"
70 #include "runtime/jniHandles.inline.hpp"
71 #include "runtime/orderAccess.hpp"
72 #include "runtime/os.inline.hpp"
73 #include "runtime/perfData.hpp"
74 #include "runtime/reflection.hpp"
75 #include "runtime/thread.inline.hpp"
76 #include "runtime/threadSMR.hpp"
77 #include "runtime/vframe.inline.hpp"
78 #include "runtime/vmOperations.hpp"
79 #include "runtime/vm_version.hpp"
80 #include "services/attachListener.hpp"
81 #include "services/management.hpp"
82 #include "services/threadService.hpp"
83 #include "utilities/copy.hpp"
84 #include "utilities/defaultStream.hpp"
85 #include "utilities/dtrace.hpp"
86 #include "utilities/events.hpp"
87 #include "utilities/histogram.hpp"
88 #include "utilities/macros.hpp"
89 #include "utilities/utf8.hpp"
90 #if INCLUDE_CDS
91 #include "classfile/systemDictionaryShared.hpp"
92 #endif
93
94 #include <errno.h>
95
96 /*
97 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
98 such ctors and calls MUST NOT come between an oop declaration/init and its
99 usage because if objects are move this may cause various memory stomps, bus
100 errors and segfaults. Here is a cookbook for causing so called "naked oop
101 failures":
102
103 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
104 JVMWrapper("JVM_GetClassDeclaredFields");
105
106 // Object address to be held directly in mirror & not visible to GC
107 oop mirror = JNIHandles::resolve_non_null(ofClass);
108
109 // If this ctor can hit a safepoint, moving objects around, then
110 ComplexConstructor foo;
111
112 // Boom! mirror may point to JUNK instead of the intended object
113 (some dereference of mirror)
114
115 // Here's another call that may block for GC, making mirror stale
116 MutexLocker ml(some_lock);
117
118 // And here's an initializer that can result in a stale oop
119 // all in one step.
120 oop o = call_that_can_throw_exception(TRAPS);
121
122
123 The solution is to keep the oop declaration BELOW the ctor or function
124 call that might cause a GC, do another resolve to reassign the oop, or
125 consider use of a Handle instead of an oop so there is immunity from object
126 motion. But note that the "QUICK" entries below do not have a handlemark
127 and thus can only support use of handles passed in.
128 */
129
130 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
131 ResourceMark rm;
132 int line_number = -1;
133 const char * source_file = NULL;
134 const char * trace = "explicit";
135 InstanceKlass* caller = NULL;
136 JavaThread* jthread = JavaThread::current();
137 if (jthread->has_last_Java_frame()) {
138 vframeStream vfst(jthread);
139
140 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
141 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
142 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
143 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
144 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
145
146 Method* last_caller = NULL;
147
148 while (!vfst.at_end()) {
149 Method* m = vfst.method();
150 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
151 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
152 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
153 break;
154 }
155 last_caller = m;
156 vfst.next();
157 }
158 // if this is called from Class.forName0 and that is called from Class.forName,
159 // then print the caller of Class.forName. If this is Class.loadClass, then print
160 // that caller, otherwise keep quiet since this should be picked up elsewhere.
161 bool found_it = false;
162 if (!vfst.at_end() &&
163 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
164 vfst.method()->name() == vmSymbols::forName0_name()) {
165 vfst.next();
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName_name()) {
169 vfst.next();
170 found_it = true;
171 }
172 } else if (last_caller != NULL &&
173 last_caller->method_holder()->name() ==
174 vmSymbols::java_lang_ClassLoader() &&
175 last_caller->name() == vmSymbols::loadClass_name()) {
176 found_it = true;
177 } else if (!vfst.at_end()) {
178 if (vfst.method()->is_native()) {
179 // JNI call
180 found_it = true;
181 }
182 }
183 if (found_it && !vfst.at_end()) {
184 // found the caller
185 caller = vfst.method()->method_holder();
186 line_number = vfst.method()->line_number_from_bci(vfst.bci());
187 if (line_number == -1) {
188 // show method name if it's a native method
189 trace = vfst.method()->name_and_sig_as_C_string();
190 }
191 Symbol* s = caller->source_file_name();
192 if (s != NULL) {
193 source_file = s->as_C_string();
194 }
195 }
196 }
197 if (caller != NULL) {
198 if (to_class != caller) {
199 const char * from = caller->external_name();
200 const char * to = to_class->external_name();
201 // print in a single call to reduce interleaving between threads
202 if (source_file != NULL) {
203 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
204 } else {
205 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
206 }
207 }
208 }
209 }
210
211 void trace_class_resolution(Klass* to_class) {
212 EXCEPTION_MARK;
213 trace_class_resolution_impl(to_class, THREAD);
214 if (HAS_PENDING_EXCEPTION) {
215 CLEAR_PENDING_EXCEPTION;
216 }
217 }
218
219 // Wrapper to trace JVM functions
220
221 #ifdef ASSERT
222 Histogram* JVMHistogram;
223 volatile int JVMHistogram_lock = 0;
224
225 class JVMHistogramElement : public HistogramElement {
226 public:
227 JVMHistogramElement(const char* name);
228 };
229
230 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
231 _name = elementName;
232 uintx count = 0;
233
234 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
235 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
236 count +=1;
237 if ( (WarnOnStalledSpinLock > 0)
238 && (count % WarnOnStalledSpinLock == 0)) {
239 warning("JVMHistogram_lock seems to be stalled");
240 }
241 }
242 }
243
244 if(JVMHistogram == NULL)
245 JVMHistogram = new Histogram("JVM Call Counts",100);
246
247 JVMHistogram->add_element(this);
248 Atomic::dec(&JVMHistogram_lock);
249 }
250
251 #define JVMCountWrapper(arg) \
252 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
253 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
254
255 #define JVMWrapper(arg) JVMCountWrapper(arg);
256 #else
257 #define JVMWrapper(arg)
258 #endif
259
260
261 // Interface version /////////////////////////////////////////////////////////////////////
262
263
264 JVM_LEAF(jint, JVM_GetInterfaceVersion())
265 return JVM_INTERFACE_VERSION;
266 JVM_END
267
268
269 // java.lang.System //////////////////////////////////////////////////////////////////////
270
271
272 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
273 JVMWrapper("JVM_CurrentTimeMillis");
274 return os::javaTimeMillis();
275 JVM_END
276
277 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
278 JVMWrapper("JVM_NanoTime");
279 return os::javaTimeNanos();
280 JVM_END
281
282 // The function below is actually exposed by jdk.internal.misc.VM and not
283 // java.lang.System, but we choose to keep it here so that it stays next
284 // to JVM_CurrentTimeMillis and JVM_NanoTime
285
286 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
287 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
288
289 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
290 JVMWrapper("JVM_GetNanoTimeAdjustment");
291 jlong seconds;
292 jlong nanos;
293
294 os::javaTimeSystemUTC(seconds, nanos);
295
296 // We're going to verify that the result can fit in a long.
297 // For that we need the difference in seconds between 'seconds'
298 // and 'offset_secs' to be such that:
299 // |seconds - offset_secs| < (2^63/10^9)
300 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
301 // which makes |seconds - offset_secs| < 2^33
302 // and we will prefer +/- 2^32 as the maximum acceptable diff
303 // as 2^32 has a more natural feel than 2^33...
304 //
305 // So if |seconds - offset_secs| >= 2^32 - we return a special
306 // sentinel value (-1) which the caller should take as an
307 // exception value indicating that the offset given to us is
308 // too far from range of the current time - leading to too big
309 // a nano adjustment. The caller is expected to recover by
310 // computing a more accurate offset and calling this method
311 // again. (For the record 2^32 secs is ~136 years, so that
312 // should rarely happen)
313 //
314 jlong diff = seconds - offset_secs;
315 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
316 return -1; // sentinel value: the offset is too far off the target
317 }
318
319 // return the adjustment. If you compute a time by adding
320 // this number of nanoseconds along with the number of seconds
321 // in the offset you should get the current UTC time.
322 return (diff * (jlong)1000000000) + nanos;
323 JVM_END
324
325 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
326 jobject dst, jint dst_pos, jint length))
327 JVMWrapper("JVM_ArrayCopy");
328 // Check if we have null pointers
329 if (src == NULL || dst == NULL) {
330 THROW(vmSymbols::java_lang_NullPointerException());
331 }
332 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
333 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
334 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
335 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
336 // Do copy
337 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
338 JVM_END
339
340
341 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
342 JavaValue r(T_OBJECT);
343 // public synchronized Object put(Object key, Object value);
344 HandleMark hm(THREAD);
345 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
346 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
347 JavaCalls::call_virtual(&r,
348 props,
349 SystemDictionary::Properties_klass(),
350 vmSymbols::put_name(),
351 vmSymbols::object_object_object_signature(),
352 key_str,
353 value_str,
354 THREAD);
355 }
356
357
358 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
359
360 /*
361 * Return all of the system properties in a Java String array with alternating
362 * names and values from the jvm SystemProperty.
363 * Which includes some internal and all commandline -D defined properties.
364 */
365 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
366 JVMWrapper("JVM_GetProperties");
367 ResourceMark rm(THREAD);
368 HandleMark hm(THREAD);
369 int ndx = 0;
370 int fixedCount = 2;
371
372 SystemProperty* p = Arguments::system_properties();
373 int count = Arguments::PropertyList_count(p);
374
375 // Allocate result String array
376 InstanceKlass* ik = SystemDictionary::String_klass();
377 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
378 objArrayHandle result_h(THREAD, r);
379
380 while (p != NULL) {
381 const char * key = p->key();
382 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
383 const char * value = p->value();
384 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
385 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
386 result_h->obj_at_put(ndx * 2, key_str());
387 result_h->obj_at_put(ndx * 2 + 1, value_str());
388 ndx++;
389 }
390 p = p->next();
391 }
392
393 // Convert the -XX:MaxDirectMemorySize= command line flag
394 // to the sun.nio.MaxDirectMemorySize property.
395 // Do this after setting user properties to prevent people
396 // from setting the value with a -D option, as requested.
397 // Leave empty if not supplied
398 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
399 char as_chars[256];
400 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
401 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
402 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
403 result_h->obj_at_put(ndx * 2, key_str());
404 result_h->obj_at_put(ndx * 2 + 1, value_str());
405 ndx++;
406 }
407
408 // JVM monitoring and management support
409 // Add the sun.management.compiler property for the compiler's name
410 {
411 #undef CSIZE
412 #if defined(_LP64) || defined(_WIN64)
413 #define CSIZE "64-Bit "
414 #else
415 #define CSIZE
416 #endif // 64bit
417
418 #ifdef TIERED
419 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
420 #else
421 #if defined(COMPILER1)
422 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
423 #elif defined(COMPILER2)
424 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
425 #elif INCLUDE_JVMCI
426 #error "INCLUDE_JVMCI should imply TIERED"
427 #else
428 const char* compiler_name = "";
429 #endif // compilers
430 #endif // TIERED
431
432 if (*compiler_name != '\0' &&
433 (Arguments::mode() != Arguments::_int)) {
434 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
435 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
436 result_h->obj_at_put(ndx * 2, key_str());
437 result_h->obj_at_put(ndx * 2 + 1, value_str());
438 ndx++;
439 }
440 }
441
442 return (jobjectArray) JNIHandles::make_local(env, result_h());
443 JVM_END
444
445
446 /*
447 * Return the temporary directory that the VM uses for the attach
448 * and perf data files.
449 *
450 * It is important that this directory is well-known and the
451 * same for all VM instances. It cannot be affected by configuration
452 * variables such as java.io.tmpdir.
453 */
454 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
455 JVMWrapper("JVM_GetTemporaryDirectory");
456 HandleMark hm(THREAD);
457 const char* temp_dir = os::get_temp_directory();
458 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
459 return (jstring) JNIHandles::make_local(env, h());
460 JVM_END
461
462
463 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
464
465 extern volatile jint vm_created;
466
467 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
468 JVMWrapper("JVM_BeforeHalt");
469 EventShutdown event;
470 if (event.should_commit()) {
471 event.set_reason("Shutdown requested from Java");
472 event.commit();
473 }
474 JVM_END
475
476
477 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
478 before_exit(thread);
479 vm_exit(code);
480 JVM_END
481
482
483 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
484 JVMWrapper("JVM_GC");
485 if (!DisableExplicitGC) {
486 Universe::heap()->collect(GCCause::_java_lang_system_gc);
487 }
488 JVM_END
489
490
491 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
492 JVMWrapper("JVM_MaxObjectInspectionAge");
493 return Universe::heap()->millis_since_last_gc();
494 JVM_END
495
496
497 static inline jlong convert_size_t_to_jlong(size_t val) {
498 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
499 NOT_LP64 (return (jlong)val;)
500 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
501 }
502
503 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
504 JVMWrapper("JVM_TotalMemory");
505 size_t n = Universe::heap()->capacity();
506 return convert_size_t_to_jlong(n);
507 JVM_END
508
509
510 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
511 JVMWrapper("JVM_FreeMemory");
512 CollectedHeap* ch = Universe::heap();
513 size_t n;
514 {
515 MutexLocker x(Heap_lock);
516 n = ch->capacity() - ch->used();
517 }
518 return convert_size_t_to_jlong(n);
519 JVM_END
520
521
522 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
523 JVMWrapper("JVM_MaxMemory");
524 size_t n = Universe::heap()->max_capacity();
525 return convert_size_t_to_jlong(n);
526 JVM_END
527
528
529 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
530 JVMWrapper("JVM_ActiveProcessorCount");
531 return os::active_processor_count();
532 JVM_END
533
534
535
536 // java.lang.Throwable //////////////////////////////////////////////////////
537
538
539 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
540 JVMWrapper("JVM_FillInStackTrace");
541 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
542 java_lang_Throwable::fill_in_stack_trace(exception);
543 JVM_END
544
545
546 // java.lang.StackTraceElement //////////////////////////////////////////////
547
548
549 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
550 JVMWrapper("JVM_InitStackTraceElementArray");
551 Handle exception(THREAD, JNIHandles::resolve(throwable));
552 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
553 objArrayHandle stack_trace(THREAD, st);
554 // Fill in the allocated stack trace
555 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
556 JVM_END
557
558
559 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
560 JVMWrapper("JVM_InitStackTraceElement");
561 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
562 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
563 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
564 JVM_END
565
566
567 // java.lang.StackWalker //////////////////////////////////////////////////////
568
569
570 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
571 jint skip_frames, jint frame_count, jint start_index,
572 jobjectArray frames))
573 JVMWrapper("JVM_CallStackWalk");
574 JavaThread* jt = (JavaThread*) THREAD;
575 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
576 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
577 }
578
579 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
580
581 // frames array is a Class<?>[] array when only getting caller reference,
582 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
583 // be null.
584 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
585 objArrayHandle frames_array_h(THREAD, fa);
586
587 int limit = start_index + frame_count;
588 if (frames_array_h->length() < limit) {
589 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
590 }
591
592 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
593 start_index, frames_array_h, CHECK_NULL);
594 return JNIHandles::make_local(env, result);
595 JVM_END
596
597
598 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
599 jint frame_count, jint start_index,
600 jobjectArray frames))
601 JVMWrapper("JVM_MoreStackWalk");
602 JavaThread* jt = (JavaThread*) THREAD;
603
604 // frames array is a Class<?>[] array when only getting caller reference,
605 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
606 // be null.
607 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
608 objArrayHandle frames_array_h(THREAD, fa);
609
610 int limit = start_index+frame_count;
611 if (frames_array_h->length() < limit) {
612 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
613 }
614
615 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
616 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
617 start_index, frames_array_h, THREAD);
618 JVM_END
619
620 // java.lang.Object ///////////////////////////////////////////////
621
622
623 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
624 JVMWrapper("JVM_IHashCode");
625 // as implemented in the classic virtual machine; return 0 if object is NULL
626 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
627 JVM_END
628
629
630 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
631 JVMWrapper("JVM_MonitorWait");
632 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
633 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
634 if (JvmtiExport::should_post_monitor_wait()) {
635 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
636
637 // The current thread already owns the monitor and it has not yet
638 // been added to the wait queue so the current thread cannot be
639 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
640 // event handler cannot accidentally consume an unpark() meant for
641 // the ParkEvent associated with this ObjectMonitor.
642 }
643 ObjectSynchronizer::wait(obj, ms, CHECK);
644 JVM_END
645
646
647 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
648 JVMWrapper("JVM_MonitorNotify");
649 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
650 ObjectSynchronizer::notify(obj, CHECK);
651 JVM_END
652
653
654 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
655 JVMWrapper("JVM_MonitorNotifyAll");
656 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
657 ObjectSynchronizer::notifyall(obj, CHECK);
658 JVM_END
659
660
661 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
662 JVMWrapper("JVM_Clone");
663 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
664 Klass* klass = obj->klass();
665 JvmtiVMObjectAllocEventCollector oam;
666
667 #ifdef ASSERT
668 // Just checking that the cloneable flag is set correct
669 if (obj->is_array()) {
670 guarantee(klass->is_cloneable(), "all arrays are cloneable");
671 } else {
672 guarantee(obj->is_instance(), "should be instanceOop");
673 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
674 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
675 }
676 #endif
677
678 // Check if class of obj supports the Cloneable interface.
679 // All arrays are considered to be cloneable (See JLS 20.1.5).
680 // All j.l.r.Reference classes are considered non-cloneable.
681 if (!klass->is_cloneable() ||
682 (klass->is_instance_klass() &&
683 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
684 ResourceMark rm(THREAD);
685 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
686 }
687 assert(!EnableValhalla || !obj->klass()->is_value(), "Clone disallowed on value type");
688
689 // Make shallow object copy
690 const int size = obj->size();
691 oop new_obj_oop = NULL;
692 if (obj->is_array()) {
693 const int length = ((arrayOop)obj())->length();
694 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
695 /* do_zero */ true, CHECK_NULL);
696 } else {
697 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
698 }
699
700 HeapAccess<>::clone(obj(), new_obj_oop, size);
701
702 Handle new_obj(THREAD, new_obj_oop);
703 // Caution: this involves a java upcall, so the clone should be
704 // "gc-robust" by this stage.
705 if (klass->has_finalizer()) {
706 assert(obj->is_instance(), "should be instanceOop");
707 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
708 new_obj = Handle(THREAD, new_obj_oop);
709 }
710
711 return JNIHandles::make_local(env, new_obj());
712 JVM_END
713
714 // java.io.File ///////////////////////////////////////////////////////////////
715
716 JVM_LEAF(char*, JVM_NativePath(char* path))
717 JVMWrapper("JVM_NativePath");
718 return os::native_path(path);
719 JVM_END
720
721
722 // Misc. class handling ///////////////////////////////////////////////////////////
723
724
725 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
726 JVMWrapper("JVM_GetCallerClass");
727
728 // Getting the class of the caller frame.
729 //
730 // The call stack at this point looks something like this:
731 //
732 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
733 // [1] [ @CallerSensitive API.method ]
734 // [.] [ (skipped intermediate frames) ]
735 // [n] [ caller ]
736 vframeStream vfst(thread);
737 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
738 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
739 Method* m = vfst.method();
740 assert(m != NULL, "sanity");
741 switch (n) {
742 case 0:
743 // This must only be called from Reflection.getCallerClass
744 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
745 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
746 }
747 // fall-through
748 case 1:
749 // Frame 0 and 1 must be caller sensitive.
750 if (!m->caller_sensitive()) {
751 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
752 }
753 break;
754 default:
755 if (!m->is_ignored_by_security_stack_walk()) {
756 // We have reached the desired frame; return the holder class.
757 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
758 }
759 break;
760 }
761 }
762 return NULL;
763 JVM_END
764
765
766 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
767 JVMWrapper("JVM_FindPrimitiveClass");
768 oop mirror = NULL;
769 BasicType t = name2type(utf);
770 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY && t != T_VALUETYPE) {
771 mirror = Universe::java_mirror(t);
772 }
773 if (mirror == NULL) {
774 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
775 } else {
776 return (jclass) JNIHandles::make_local(env, mirror);
777 }
778 JVM_END
779
780
781 // Returns a class loaded by the bootstrap class loader; or null
782 // if not found. ClassNotFoundException is not thrown.
783 // FindClassFromBootLoader is exported to the launcher for windows.
784 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
785 const char* name))
786 JVMWrapper("JVM_FindClassFromBootLoader");
787
788 // Java libraries should ensure that name is never null...
789 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
790 // It's impossible to create this class; the name cannot fit
791 // into the constant pool.
792 return NULL;
793 }
794
795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
796 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
797 if (k == NULL) {
798 return NULL;
799 }
800
801 if (log_is_enabled(Debug, class, resolve)) {
802 trace_class_resolution(k);
803 }
804 return (jclass) JNIHandles::make_local(env, k->java_mirror());
805 JVM_END
806
807 // Find a class with this name in this loader, using the caller's protection domain.
808 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
809 jboolean init, jobject loader,
810 jclass caller))
811 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
812 // Java libraries should ensure that name is never null...
813 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
814 // It's impossible to create this class; the name cannot fit
815 // into the constant pool.
816 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
817 }
818
819 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
820
821 oop loader_oop = JNIHandles::resolve(loader);
822 oop from_class = JNIHandles::resolve(caller);
823 oop protection_domain = NULL;
824 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
825 // NPE. Put it in another way, the bootstrap class loader has all permission and
826 // thus no checkPackageAccess equivalence in the VM class loader.
827 // The caller is also passed as NULL by the java code if there is no security
828 // manager to avoid the performance cost of getting the calling class.
829 if (from_class != NULL && loader_oop != NULL) {
830 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
831 }
832
833 Handle h_loader(THREAD, loader_oop);
834 Handle h_prot(THREAD, protection_domain);
835 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
836 h_prot, false, THREAD);
837
838 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
839 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
840 }
841 return result;
842 JVM_END
843
844 // Currently only called from the old verifier.
845 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
846 jboolean init, jclass from))
847 JVMWrapper("JVM_FindClassFromClass");
848 if (name == NULL) {
849 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
850 }
851 if ((int)strlen(name) > Symbol::max_length()) {
852 // It's impossible to create this class; the name cannot fit
853 // into the constant pool.
854 Exceptions::fthrow(THREAD_AND_LOCATION,
855 vmSymbols::java_lang_NoClassDefFoundError(),
856 "Class name exceeds maximum length of %d: %s",
857 Symbol::max_length(),
858 name);
859 return 0;
860 }
861 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
862 oop from_class_oop = JNIHandles::resolve(from);
863 Klass* from_class = (from_class_oop == NULL)
864 ? (Klass*)NULL
865 : java_lang_Class::as_Klass(from_class_oop);
866 oop class_loader = NULL;
867 oop protection_domain = NULL;
868 if (from_class != NULL) {
869 class_loader = from_class->class_loader();
870 protection_domain = from_class->protection_domain();
871 }
872 Handle h_loader(THREAD, class_loader);
873 Handle h_prot (THREAD, protection_domain);
874 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
875 h_prot, true, thread);
876
877 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
878 // this function is generally only used for class loading during verification.
879 ResourceMark rm;
880 oop from_mirror = JNIHandles::resolve_non_null(from);
881 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
882 const char * from_name = from_class->external_name();
883
884 oop mirror = JNIHandles::resolve_non_null(result);
885 Klass* to_class = java_lang_Class::as_Klass(mirror);
886 const char * to = to_class->external_name();
887 log_debug(class, resolve)("%s %s (verification)", from_name, to);
888 }
889
890 return result;
891 JVM_END
892
893 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
894 if (loader.is_null()) {
895 return;
896 }
897
898 // check whether the current caller thread holds the lock or not.
899 // If not, increment the corresponding counter
900 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
901 ObjectSynchronizer::owner_self) {
902 counter->inc();
903 }
904 }
905
906 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
907 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
908 jobject loader, const jbyte *buf,
909 jsize len, jobject pd, const char *source,
910 TRAPS) {
911 if (source == NULL) source = "__JVM_DefineClass__";
912
913 assert(THREAD->is_Java_thread(), "must be a JavaThread");
914 JavaThread* jt = (JavaThread*) THREAD;
915
916 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
917 ClassLoader::perf_define_appclass_selftime(),
918 ClassLoader::perf_define_appclasses(),
919 jt->get_thread_stat()->perf_recursion_counts_addr(),
920 jt->get_thread_stat()->perf_timers_addr(),
921 PerfClassTraceTime::DEFINE_CLASS);
922
923 if (UsePerfData) {
924 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
925 }
926
927 // Since exceptions can be thrown, class initialization can take place
928 // if name is NULL no check for class name in .class stream has to be made.
929 TempNewSymbol class_name = NULL;
930 if (name != NULL) {
931 const int str_len = (int)strlen(name);
932 if (str_len > Symbol::max_length()) {
933 // It's impossible to create this class; the name cannot fit
934 // into the constant pool.
935 Exceptions::fthrow(THREAD_AND_LOCATION,
936 vmSymbols::java_lang_NoClassDefFoundError(),
937 "Class name exceeds maximum length of %d: %s",
938 Symbol::max_length(),
939 name);
940 return 0;
941 }
942 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
943 }
944
945 ResourceMark rm(THREAD);
946 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
947 Handle class_loader (THREAD, JNIHandles::resolve(loader));
948 if (UsePerfData) {
949 is_lock_held_by_thread(class_loader,
950 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
951 THREAD);
952 }
953 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
954 Klass* k = SystemDictionary::resolve_from_stream(class_name,
955 class_loader,
956 protection_domain,
957 &st,
958 CHECK_NULL);
959
960 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
961 trace_class_resolution(k);
962 }
963
964 return (jclass) JNIHandles::make_local(env, k->java_mirror());
965 }
966
967
968 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
969 JVMWrapper("JVM_DefineClass");
970
971 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
972 JVM_END
973
974
975 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
976 JVMWrapper("JVM_DefineClassWithSource");
977
978 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
979 JVM_END
980
981 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
982 JVMWrapper("JVM_FindLoadedClass");
983 ResourceMark rm(THREAD);
984
985 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
986 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
987
988 const char* str = java_lang_String::as_utf8_string(string());
989 // Sanity check, don't expect null
990 if (str == NULL) return NULL;
991
992 const int str_len = (int)strlen(str);
993 if (str_len > Symbol::max_length()) {
994 // It's impossible to create this class; the name cannot fit
995 // into the constant pool.
996 return NULL;
997 }
998 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
999
1000 // Security Note:
1001 // The Java level wrapper will perform the necessary security check allowing
1002 // us to pass the NULL as the initiating class loader.
1003 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1004 if (UsePerfData) {
1005 is_lock_held_by_thread(h_loader,
1006 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1007 THREAD);
1008 }
1009
1010 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1011 h_loader,
1012 Handle(),
1013 CHECK_NULL);
1014 #if INCLUDE_CDS
1015 if (k == NULL) {
1016 // If the class is not already loaded, try to see if it's in the shared
1017 // archive for the current classloader (h_loader).
1018 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1019 }
1020 #endif
1021 return (k == NULL) ? NULL :
1022 (jclass) JNIHandles::make_local(env, k->java_mirror());
1023 JVM_END
1024
1025 // Module support //////////////////////////////////////////////////////////////////////////////
1026
1027 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1028 jstring location, const char* const* packages, jsize num_packages))
1029 JVMWrapper("JVM_DefineModule");
1030 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1031 JVM_END
1032
1033 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1034 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1035 Modules::set_bootloader_unnamed_module(module, CHECK);
1036 JVM_END
1037
1038 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1039 JVMWrapper("JVM_AddModuleExports");
1040 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1041 JVM_END
1042
1043 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1044 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1045 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1046 JVM_END
1047
1048 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1049 JVMWrapper("JVM_AddModuleExportsToAll");
1050 Modules::add_module_exports(from_module, package, NULL, CHECK);
1051 JVM_END
1052
1053 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1054 JVMWrapper("JVM_AddReadsModule");
1055 Modules::add_reads_module(from_module, source_module, CHECK);
1056 JVM_END
1057
1058 // Reflection support //////////////////////////////////////////////////////////////////////////////
1059
1060 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1061 assert (cls != NULL, "illegal class");
1062 JVMWrapper("JVM_InitClassName");
1063 JvmtiVMObjectAllocEventCollector oam;
1064 ResourceMark rm(THREAD);
1065 HandleMark hm(THREAD);
1066 Handle java_class(THREAD, JNIHandles::resolve(cls));
1067 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1068 return (jstring) JNIHandles::make_local(env, result);
1069 JVM_END
1070
1071
1072 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1073 JVMWrapper("JVM_GetClassInterfaces");
1074 JvmtiVMObjectAllocEventCollector oam;
1075 oop mirror = JNIHandles::resolve_non_null(cls);
1076
1077 // Special handling for primitive objects
1078 if (java_lang_Class::is_primitive(mirror)) {
1079 // Primitive objects does not have any interfaces
1080 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1081 return (jobjectArray) JNIHandles::make_local(env, r);
1082 }
1083
1084 Klass* klass = java_lang_Class::as_Klass(mirror);
1085 // Figure size of result array
1086 int size;
1087 if (klass->is_instance_klass()) {
1088 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1089 } else {
1090 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1091 size = 2;
1092 }
1093
1094 // Allocate result array
1095 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1096 objArrayHandle result (THREAD, r);
1097 // Fill in result
1098 if (klass->is_instance_klass()) {
1099 // Regular instance klass, fill in all local interfaces
1100 for (int index = 0; index < size; index++) {
1101 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1102 result->obj_at_put(index, k->java_mirror());
1103 }
1104 } else {
1105 // All arrays implement java.lang.Cloneable and java.io.Serializable
1106 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1107 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1108 }
1109 return (jobjectArray) JNIHandles::make_local(env, result());
1110 JVM_END
1111
1112
1113 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1114 JVMWrapper("JVM_IsInterface");
1115 oop mirror = JNIHandles::resolve_non_null(cls);
1116 if (java_lang_Class::is_primitive(mirror)) {
1117 return JNI_FALSE;
1118 }
1119 Klass* k = java_lang_Class::as_Klass(mirror);
1120 jboolean result = k->is_interface();
1121 assert(!result || k->is_instance_klass(),
1122 "all interfaces are instance types");
1123 // The compiler intrinsic for isInterface tests the
1124 // Klass::_access_flags bits in the same way.
1125 return result;
1126 JVM_END
1127
1128
1129 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1130 JVMWrapper("JVM_GetClassSigners");
1131 JvmtiVMObjectAllocEventCollector oam;
1132 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1133 // There are no signers for primitive types
1134 return NULL;
1135 }
1136
1137 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1138
1139 // If there are no signers set in the class, or if the class
1140 // is an array, return NULL.
1141 if (signers == NULL) return NULL;
1142
1143 // copy of the signers array
1144 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1145 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1146 for (int index = 0; index < signers->length(); index++) {
1147 signers_copy->obj_at_put(index, signers->obj_at(index));
1148 }
1149
1150 // return the copy
1151 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1152 JVM_END
1153
1154
1155 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1156 JVMWrapper("JVM_SetClassSigners");
1157 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1158 // This call is ignored for primitive types and arrays.
1159 // Signers are only set once, ClassLoader.java, and thus shouldn't
1160 // be called with an array. Only the bootstrap loader creates arrays.
1161 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1162 if (k->is_instance_klass()) {
1163 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1164 }
1165 }
1166 JVM_END
1167
1168
1169 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1170 JVMWrapper("JVM_GetProtectionDomain");
1171 if (JNIHandles::resolve(cls) == NULL) {
1172 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1173 }
1174
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1176 // Primitive types does not have a protection domain.
1177 return NULL;
1178 }
1179
1180 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1181 return (jobject) JNIHandles::make_local(env, pd);
1182 JVM_END
1183
1184
1185 // Returns the inherited_access_control_context field of the running thread.
1186 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1187 JVMWrapper("JVM_GetInheritedAccessControlContext");
1188 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1189 return JNIHandles::make_local(env, result);
1190 JVM_END
1191
1192 class RegisterArrayForGC {
1193 private:
1194 JavaThread *_thread;
1195 public:
1196 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1197 _thread = thread;
1198 _thread->register_array_for_gc(array);
1199 }
1200
1201 ~RegisterArrayForGC() {
1202 _thread->register_array_for_gc(NULL);
1203 }
1204 };
1205
1206
1207 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1208 JVMWrapper("JVM_GetStackAccessControlContext");
1209 if (!UsePrivilegedStack) return NULL;
1210
1211 ResourceMark rm(THREAD);
1212 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1213 JvmtiVMObjectAllocEventCollector oam;
1214
1215 // count the protection domains on the execution stack. We collapse
1216 // duplicate consecutive protection domains into a single one, as
1217 // well as stopping when we hit a privileged frame.
1218
1219 oop previous_protection_domain = NULL;
1220 Handle privileged_context(thread, NULL);
1221 bool is_privileged = false;
1222 oop protection_domain = NULL;
1223
1224 // Iterate through Java frames
1225 vframeStream vfst(thread);
1226 for(; !vfst.at_end(); vfst.next()) {
1227 // get method of frame
1228 Method* method = vfst.method();
1229
1230 // stop at the first privileged frame
1231 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1232 method->name() == vmSymbols::executePrivileged_name())
1233 {
1234 // this frame is privileged
1235 is_privileged = true;
1236
1237 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1238
1239 StackValueCollection* locals = priv->locals();
1240 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1241 StackValue* clr_sv = locals->at(2); // Class<?> caller
1242 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1243 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1244 privileged_context = ctx_sv->get_obj();
1245 Handle caller = clr_sv->get_obj();
1246
1247 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1248 protection_domain = caller_klass->protection_domain();
1249 } else {
1250 protection_domain = method->method_holder()->protection_domain();
1251 }
1252
1253 if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1254 local_array->push(protection_domain);
1255 previous_protection_domain = protection_domain;
1256 }
1257
1258 if (is_privileged) break;
1259 }
1260
1261
1262 // either all the domains on the stack were system domains, or
1263 // we had a privileged system domain
1264 if (local_array->is_empty()) {
1265 if (is_privileged && privileged_context.is_null()) return NULL;
1266
1267 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1268 return JNIHandles::make_local(env, result);
1269 }
1270
1271 // the resource area must be registered in case of a gc
1272 RegisterArrayForGC ragc(thread, local_array);
1273 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1274 local_array->length(), CHECK_NULL);
1275 objArrayHandle h_context(thread, context);
1276 for (int index = 0; index < local_array->length(); index++) {
1277 h_context->obj_at_put(index, local_array->at(index));
1278 }
1279
1280 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1281
1282 return JNIHandles::make_local(env, result);
1283 JVM_END
1284
1285
1286 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1287 JVMWrapper("JVM_IsArrayClass");
1288 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1289 return (k != NULL) && k->is_array_klass() ? true : false;
1290 JVM_END
1291
1292
1293 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1294 JVMWrapper("JVM_IsPrimitiveClass");
1295 oop mirror = JNIHandles::resolve_non_null(cls);
1296 return (jboolean) java_lang_Class::is_primitive(mirror);
1297 JVM_END
1298
1299
1300 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1301 JVMWrapper("JVM_GetClassModifiers");
1302 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1303 // Primitive type
1304 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1305 }
1306
1307 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1308 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1309 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1310 return k->modifier_flags();
1311 JVM_END
1312
1313
1314 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1315
1316 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1317 JvmtiVMObjectAllocEventCollector oam;
1318 // ofClass is a reference to a java_lang_Class object. The mirror object
1319 // of an InstanceKlass
1320
1321 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1322 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1323 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1324 return (jobjectArray)JNIHandles::make_local(env, result);
1325 }
1326
1327 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1328 InnerClassesIterator iter(k);
1329
1330 if (iter.length() == 0) {
1331 // Neither an inner nor outer class
1332 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1333 return (jobjectArray)JNIHandles::make_local(env, result);
1334 }
1335
1336 // find inner class info
1337 constantPoolHandle cp(thread, k->constants());
1338 int length = iter.length();
1339
1340 // Allocate temp. result array
1341 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1342 objArrayHandle result (THREAD, r);
1343 int members = 0;
1344
1345 for (; !iter.done(); iter.next()) {
1346 int ioff = iter.inner_class_info_index();
1347 int ooff = iter.outer_class_info_index();
1348
1349 if (ioff != 0 && ooff != 0) {
1350 // Check to see if the name matches the class we're looking for
1351 // before attempting to find the class.
1352 if (cp->klass_name_at_matches(k, ooff)) {
1353 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1354 if (outer_klass == k) {
1355 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1356 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1357
1358 // Throws an exception if outer klass has not declared k as
1359 // an inner klass
1360 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1361
1362 result->obj_at_put(members, inner_klass->java_mirror());
1363 members++;
1364 }
1365 }
1366 }
1367 }
1368
1369 if (members != length) {
1370 // Return array of right length
1371 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1372 for(int i = 0; i < members; i++) {
1373 res->obj_at_put(i, result->obj_at(i));
1374 }
1375 return (jobjectArray)JNIHandles::make_local(env, res);
1376 }
1377
1378 return (jobjectArray)JNIHandles::make_local(env, result());
1379 JVM_END
1380
1381
1382 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1383 {
1384 // ofClass is a reference to a java_lang_Class object.
1385 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1386 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1387 return NULL;
1388 }
1389
1390 bool inner_is_member = false;
1391 Klass* outer_klass
1392 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1393 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1394 if (outer_klass == NULL) return NULL; // already a top-level class
1395 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1396 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1397 }
1398 JVM_END
1399
1400 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1401 {
1402 oop mirror = JNIHandles::resolve_non_null(cls);
1403 if (java_lang_Class::is_primitive(mirror) ||
1404 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1405 return NULL;
1406 }
1407 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1408 int ooff = 0, noff = 0;
1409 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1410 if (noff != 0) {
1411 constantPoolHandle i_cp(thread, k->constants());
1412 Symbol* name = i_cp->symbol_at(noff);
1413 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1414 return (jstring) JNIHandles::make_local(env, str());
1415 }
1416 }
1417 return NULL;
1418 }
1419 JVM_END
1420
1421 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1422 assert (cls != NULL, "illegal class");
1423 JVMWrapper("JVM_GetClassSignature");
1424 JvmtiVMObjectAllocEventCollector oam;
1425 ResourceMark rm(THREAD);
1426 // Return null for arrays and primatives
1427 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1428 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1429 if (k->is_instance_klass()) {
1430 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1431 if (sym == NULL) return NULL;
1432 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1433 return (jstring) JNIHandles::make_local(env, str());
1434 }
1435 }
1436 return NULL;
1437 JVM_END
1438
1439
1440 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1441 assert (cls != NULL, "illegal class");
1442 JVMWrapper("JVM_GetClassAnnotations");
1443
1444 // Return null for arrays and primitives
1445 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1447 if (k->is_instance_klass()) {
1448 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1449 return (jbyteArray) JNIHandles::make_local(env, a);
1450 }
1451 }
1452 return NULL;
1453 JVM_END
1454
1455
1456 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1457 // some of this code was adapted from from jni_FromReflectedField
1458
1459 oop reflected = JNIHandles::resolve_non_null(field);
1460 oop mirror = java_lang_reflect_Field::clazz(reflected);
1461 Klass* k = java_lang_Class::as_Klass(mirror);
1462 int slot = java_lang_reflect_Field::slot(reflected);
1463 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1464
1465 InstanceKlass* ik = InstanceKlass::cast(k);
1466 intptr_t offset = ik->field_offset(slot);
1467
1468 if (modifiers & JVM_ACC_STATIC) {
1469 // for static fields we only look in the current class
1470 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1471 assert(false, "cannot find static field");
1472 return false;
1473 }
1474 } else {
1475 // for instance fields we start with the current class and work
1476 // our way up through the superclass chain
1477 if (!ik->find_field_from_offset(offset, false, &fd)) {
1478 assert(false, "cannot find instance field");
1479 return false;
1480 }
1481 }
1482 return true;
1483 }
1484
1485 static Method* jvm_get_method_common(jobject method) {
1486 // some of this code was adapted from from jni_FromReflectedMethod
1487
1488 oop reflected = JNIHandles::resolve_non_null(method);
1489 oop mirror = NULL;
1490 int slot = 0;
1491
1492 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1493 mirror = java_lang_reflect_Constructor::clazz(reflected);
1494 slot = java_lang_reflect_Constructor::slot(reflected);
1495 } else {
1496 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1497 "wrong type");
1498 mirror = java_lang_reflect_Method::clazz(reflected);
1499 slot = java_lang_reflect_Method::slot(reflected);
1500 }
1501 Klass* k = java_lang_Class::as_Klass(mirror);
1502
1503 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1504 assert(m != NULL, "cannot find method");
1505 return m; // caller has to deal with NULL in product mode
1506 }
1507
1508 /* Type use annotations support (JDK 1.8) */
1509
1510 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1511 assert (cls != NULL, "illegal class");
1512 JVMWrapper("JVM_GetClassTypeAnnotations");
1513 ResourceMark rm(THREAD);
1514 // Return null for arrays and primitives
1515 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1516 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1517 if (k->is_instance_klass()) {
1518 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1519 if (type_annotations != NULL) {
1520 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1521 return (jbyteArray) JNIHandles::make_local(env, a);
1522 }
1523 }
1524 }
1525 return NULL;
1526 JVM_END
1527
1528 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1529 assert (method != NULL, "illegal method");
1530 JVMWrapper("JVM_GetMethodTypeAnnotations");
1531
1532 // method is a handle to a java.lang.reflect.Method object
1533 Method* m = jvm_get_method_common(method);
1534 if (m == NULL) {
1535 return NULL;
1536 }
1537
1538 AnnotationArray* type_annotations = m->type_annotations();
1539 if (type_annotations != NULL) {
1540 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1541 return (jbyteArray) JNIHandles::make_local(env, a);
1542 }
1543
1544 return NULL;
1545 JVM_END
1546
1547 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1548 assert (field != NULL, "illegal field");
1549 JVMWrapper("JVM_GetFieldTypeAnnotations");
1550
1551 fieldDescriptor fd;
1552 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1553 if (!gotFd) {
1554 return NULL;
1555 }
1556
1557 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1558 JVM_END
1559
1560 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1561 if (!cp->is_within_bounds(index)) {
1562 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1563 }
1564 }
1565
1566 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1567 {
1568 JVMWrapper("JVM_GetMethodParameters");
1569 // method is a handle to a java.lang.reflect.Method object
1570 Method* method_ptr = jvm_get_method_common(method);
1571 methodHandle mh (THREAD, method_ptr);
1572 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1573 const int num_params = mh->method_parameters_length();
1574
1575 if (num_params < 0) {
1576 // A -1 return value from method_parameters_length means there is no
1577 // parameter data. Return null to indicate this to the reflection
1578 // API.
1579 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1580 return (jobjectArray)NULL;
1581 } else {
1582 // Otherwise, we return something up to reflection, even if it is
1583 // a zero-length array. Why? Because in some cases this can
1584 // trigger a MalformedParametersException.
1585
1586 // make sure all the symbols are properly formatted
1587 for (int i = 0; i < num_params; i++) {
1588 MethodParametersElement* params = mh->method_parameters_start();
1589 int index = params[i].name_cp_index;
1590 bounds_check(mh->constants(), index, CHECK_NULL);
1591
1592 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1593 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1594 "Wrong type at constant pool index");
1595 }
1596
1597 }
1598
1599 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1600 objArrayHandle result (THREAD, result_oop);
1601
1602 for (int i = 0; i < num_params; i++) {
1603 MethodParametersElement* params = mh->method_parameters_start();
1604 // For a 0 index, give a NULL symbol
1605 Symbol* sym = 0 != params[i].name_cp_index ?
1606 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1607 int flags = params[i].flags;
1608 oop param = Reflection::new_parameter(reflected_method, i, sym,
1609 flags, CHECK_NULL);
1610 result->obj_at_put(i, param);
1611 }
1612 return (jobjectArray)JNIHandles::make_local(env, result());
1613 }
1614 }
1615 JVM_END
1616
1617 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1618
1619 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1620 {
1621 JVMWrapper("JVM_GetClassDeclaredFields");
1622 JvmtiVMObjectAllocEventCollector oam;
1623
1624 // Exclude primitive types and array types
1625 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1626 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1627 // Return empty array
1628 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1629 return (jobjectArray) JNIHandles::make_local(env, res);
1630 }
1631
1632 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1633 constantPoolHandle cp(THREAD, k->constants());
1634
1635 // Ensure class is linked
1636 k->link_class(CHECK_NULL);
1637
1638 // Allocate result
1639 int num_fields;
1640
1641 if (publicOnly) {
1642 num_fields = 0;
1643 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1644 if (fs.access_flags().is_public()) ++num_fields;
1645 }
1646 } else {
1647 num_fields = k->java_fields_count();
1648 }
1649
1650 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1651 objArrayHandle result (THREAD, r);
1652
1653 int out_idx = 0;
1654 fieldDescriptor fd;
1655 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1656 if (!publicOnly || fs.access_flags().is_public()) {
1657 fd.reinitialize(k, fs.index());
1658 oop field = Reflection::new_field(&fd, CHECK_NULL);
1659 result->obj_at_put(out_idx, field);
1660 ++out_idx;
1661 }
1662 }
1663 assert(out_idx == num_fields, "just checking");
1664 return (jobjectArray) JNIHandles::make_local(env, result());
1665 }
1666 JVM_END
1667
1668 static bool select_method(const methodHandle& method, bool want_constructor) {
1669 bool is_ctor = (method->is_object_constructor() ||
1670 method->is_static_init_factory());
1671 if (want_constructor) {
1672 return is_ctor;
1673 } else {
1674 return (!is_ctor &&
1675 !method->is_class_initializer() &&
1676 !method->is_overpass());
1677 }
1678 }
1679
1680 static jobjectArray get_class_declared_methods_helper(
1681 JNIEnv *env,
1682 jclass ofClass, jboolean publicOnly,
1683 bool want_constructor,
1684 Klass* klass, TRAPS) {
1685
1686 JvmtiVMObjectAllocEventCollector oam;
1687
1688 // Exclude primitive types and array types
1689 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1690 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1691 // Return empty array
1692 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1693 return (jobjectArray) JNIHandles::make_local(env, res);
1694 }
1695
1696 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1697
1698 // Ensure class is linked
1699 k->link_class(CHECK_NULL);
1700
1701 Array<Method*>* methods = k->methods();
1702 int methods_length = methods->length();
1703
1704 // Save original method_idnum in case of redefinition, which can change
1705 // the idnum of obsolete methods. The new method will have the same idnum
1706 // but if we refresh the methods array, the counts will be wrong.
1707 ResourceMark rm(THREAD);
1708 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1709 int num_methods = 0;
1710
1711 for (int i = 0; i < methods_length; i++) {
1712 methodHandle method(THREAD, methods->at(i));
1713 if (select_method(method, want_constructor)) {
1714 if (!publicOnly || method->is_public()) {
1715 idnums->push(method->method_idnum());
1716 ++num_methods;
1717 }
1718 }
1719 }
1720
1721 // Allocate result
1722 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1723 objArrayHandle result (THREAD, r);
1724
1725 // Now just put the methods that we selected above, but go by their idnum
1726 // in case of redefinition. The methods can be redefined at any safepoint,
1727 // so above when allocating the oop array and below when creating reflect
1728 // objects.
1729 for (int i = 0; i < num_methods; i++) {
1730 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1731 if (method.is_null()) {
1732 // Method may have been deleted and seems this API can handle null
1733 // Otherwise should probably put a method that throws NSME
1734 result->obj_at_put(i, NULL);
1735 } else {
1736 oop m;
1737 if (want_constructor) {
1738 assert(method->is_object_constructor() ||
1739 method->is_static_init_factory(), "must be");
1740 m = Reflection::new_constructor(method, CHECK_NULL);
1741 } else {
1742 m = Reflection::new_method(method, false, CHECK_NULL);
1743 }
1744 result->obj_at_put(i, m);
1745 }
1746 }
1747
1748 return (jobjectArray) JNIHandles::make_local(env, result());
1749 }
1750
1751 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1752 {
1753 JVMWrapper("JVM_GetClassDeclaredMethods");
1754 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1755 /*want_constructor*/ false,
1756 SystemDictionary::reflect_Method_klass(), THREAD);
1757 }
1758 JVM_END
1759
1760 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1761 {
1762 JVMWrapper("JVM_GetClassDeclaredConstructors");
1763 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1764 /*want_constructor*/ true,
1765 SystemDictionary::reflect_Constructor_klass(), THREAD);
1766 }
1767 JVM_END
1768
1769 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1770 {
1771 JVMWrapper("JVM_GetClassAccessFlags");
1772 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1773 // Primitive type
1774 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1775 }
1776
1777 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1778 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1779 }
1780 JVM_END
1781
1782 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1783 {
1784 JVMWrapper("JVM_AreNestMates");
1785 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1786 assert(c->is_instance_klass(), "must be");
1787 InstanceKlass* ck = InstanceKlass::cast(c);
1788 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1789 assert(m->is_instance_klass(), "must be");
1790 InstanceKlass* mk = InstanceKlass::cast(m);
1791 return ck->has_nestmate_access_to(mk, THREAD);
1792 }
1793 JVM_END
1794
1795 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1796 {
1797 // current is not a primitive or array class
1798 JVMWrapper("JVM_GetNestHost");
1799 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1800 assert(c->is_instance_klass(), "must be");
1801 InstanceKlass* ck = InstanceKlass::cast(c);
1802 // Don't post exceptions if validation fails
1803 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1804 return (jclass) (host == NULL ? NULL :
1805 JNIHandles::make_local(THREAD, host->java_mirror()));
1806 }
1807 JVM_END
1808
1809 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1810 {
1811 // current is not a primitive or array class
1812 JVMWrapper("JVM_GetNestMembers");
1813 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1814 assert(c->is_instance_klass(), "must be");
1815 InstanceKlass* ck = InstanceKlass::cast(c);
1816 // Get the nest host for this nest - throw ICCE if validation fails
1817 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1818 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1819
1820 {
1821 JvmtiVMObjectAllocEventCollector oam;
1822 Array<u2>* members = host->nest_members();
1823 int length = members == NULL ? 0 : members->length();
1824 // nest host is first in the array so make it one bigger
1825 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1826 length + 1, CHECK_NULL);
1827 objArrayHandle result (THREAD, r);
1828 result->obj_at_put(0, host->java_mirror());
1829 if (length != 0) {
1830 int i;
1831 for (i = 0; i < length; i++) {
1832 int cp_index = members->at(i);
1833 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1834 if (k->is_instance_klass()) {
1835 InstanceKlass* nest_host_k =
1836 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1837 if (nest_host_k == host) {
1838 result->obj_at_put(i+1, k->java_mirror());
1839 }
1840 else {
1841 // k's nest host is legal but it isn't our host so
1842 // throw ICCE
1843 ResourceMark rm(THREAD);
1844 Exceptions::fthrow(THREAD_AND_LOCATION,
1845 icce,
1846 "Nest member %s in %s declares a different nest host of %s",
1847 k->external_name(),
1848 host->external_name(),
1849 nest_host_k->external_name()
1850 );
1851 return NULL;
1852 }
1853 }
1854 else {
1855 // we have a bad nest member entry - throw ICCE
1856 ResourceMark rm(THREAD);
1857 Exceptions::fthrow(THREAD_AND_LOCATION,
1858 icce,
1859 "Class %s can not be a nest member of %s",
1860 k->external_name(),
1861 host->external_name()
1862 );
1863 return NULL;
1864 }
1865 }
1866 }
1867 else {
1868 assert(host == ck, "must be singleton nest");
1869 }
1870 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1871 }
1872 }
1873 JVM_END
1874
1875 // Constant pool access //////////////////////////////////////////////////////////
1876
1877 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1878 {
1879 JVMWrapper("JVM_GetClassConstantPool");
1880 JvmtiVMObjectAllocEventCollector oam;
1881
1882 // Return null for primitives and arrays
1883 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1884 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1885 if (k->is_instance_klass()) {
1886 InstanceKlass* k_h = InstanceKlass::cast(k);
1887 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1888 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1889 return JNIHandles::make_local(jcp());
1890 }
1891 }
1892 return NULL;
1893 }
1894 JVM_END
1895
1896
1897 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1898 {
1899 JVMWrapper("JVM_ConstantPoolGetSize");
1900 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1901 return cp->length();
1902 }
1903 JVM_END
1904
1905
1906 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1907 {
1908 JVMWrapper("JVM_ConstantPoolGetClassAt");
1909 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1910 bounds_check(cp, index, CHECK_NULL);
1911 constantTag tag = cp->tag_at(index);
1912 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1913 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1914 }
1915 Klass* k = cp->klass_at(index, CHECK_NULL);
1916 return (jclass) JNIHandles::make_local(k->java_mirror());
1917 }
1918 JVM_END
1919
1920 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1921 {
1922 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1923 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1924 bounds_check(cp, index, CHECK_NULL);
1925 constantTag tag = cp->tag_at(index);
1926 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1927 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1928 }
1929 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1930 if (k == NULL) return NULL;
1931 return (jclass) JNIHandles::make_local(k->java_mirror());
1932 }
1933 JVM_END
1934
1935 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1936 constantTag tag = cp->tag_at(index);
1937 if (!tag.is_method() && !tag.is_interface_method()) {
1938 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1939 }
1940 int klass_ref = cp->uncached_klass_ref_index_at(index);
1941 Klass* k_o;
1942 if (force_resolution) {
1943 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1944 } else {
1945 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1946 if (k_o == NULL) return NULL;
1947 }
1948 InstanceKlass* k = InstanceKlass::cast(k_o);
1949 Symbol* name = cp->uncached_name_ref_at(index);
1950 Symbol* sig = cp->uncached_signature_ref_at(index);
1951 methodHandle m (THREAD, k->find_method(name, sig));
1952 if (m.is_null()) {
1953 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1954 }
1955 oop method;
1956 if (m->is_object_constructor()) {
1957 method = Reflection::new_constructor(m, CHECK_NULL);
1958 } else {
1959 method = Reflection::new_method(m, true, CHECK_NULL);
1960 }
1961 return JNIHandles::make_local(method);
1962 }
1963
1964 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1965 {
1966 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1967 JvmtiVMObjectAllocEventCollector oam;
1968 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1969 bounds_check(cp, index, CHECK_NULL);
1970 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1971 return res;
1972 }
1973 JVM_END
1974
1975 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1976 {
1977 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1978 JvmtiVMObjectAllocEventCollector oam;
1979 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1980 bounds_check(cp, index, CHECK_NULL);
1981 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1982 return res;
1983 }
1984 JVM_END
1985
1986 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1987 constantTag tag = cp->tag_at(index);
1988 if (!tag.is_field()) {
1989 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1990 }
1991 int klass_ref = cp->uncached_klass_ref_index_at(index);
1992 Klass* k_o;
1993 if (force_resolution) {
1994 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1995 } else {
1996 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1997 if (k_o == NULL) return NULL;
1998 }
1999 InstanceKlass* k = InstanceKlass::cast(k_o);
2000 Symbol* name = cp->uncached_name_ref_at(index);
2001 Symbol* sig = cp->uncached_signature_ref_at(index);
2002 fieldDescriptor fd;
2003 Klass* target_klass = k->find_field(name, sig, &fd);
2004 if (target_klass == NULL) {
2005 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2006 }
2007 oop field = Reflection::new_field(&fd, CHECK_NULL);
2008 return JNIHandles::make_local(field);
2009 }
2010
2011 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2012 {
2013 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2014 JvmtiVMObjectAllocEventCollector oam;
2015 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2016 bounds_check(cp, index, CHECK_NULL);
2017 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2018 return res;
2019 }
2020 JVM_END
2021
2022 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2023 {
2024 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2025 JvmtiVMObjectAllocEventCollector oam;
2026 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2027 bounds_check(cp, index, CHECK_NULL);
2028 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2029 return res;
2030 }
2031 JVM_END
2032
2033 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2034 {
2035 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2036 JvmtiVMObjectAllocEventCollector oam;
2037 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2038 bounds_check(cp, index, CHECK_NULL);
2039 constantTag tag = cp->tag_at(index);
2040 if (!tag.is_field_or_method()) {
2041 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2042 }
2043 int klass_ref = cp->uncached_klass_ref_index_at(index);
2044 Symbol* klass_name = cp->klass_name_at(klass_ref);
2045 Symbol* member_name = cp->uncached_name_ref_at(index);
2046 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2047 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2048 objArrayHandle dest(THREAD, dest_o);
2049 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2050 dest->obj_at_put(0, str());
2051 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2052 dest->obj_at_put(1, str());
2053 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2054 dest->obj_at_put(2, str());
2055 return (jobjectArray) JNIHandles::make_local(dest());
2056 }
2057 JVM_END
2058
2059 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2060 {
2061 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2062 JvmtiVMObjectAllocEventCollector oam;
2063 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2064 bounds_check(cp, index, CHECK_0);
2065 constantTag tag = cp->tag_at(index);
2066 if (!tag.is_field_or_method()) {
2067 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2068 }
2069 return (jint) cp->uncached_klass_ref_index_at(index);
2070 }
2071 JVM_END
2072
2073 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2074 {
2075 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2076 JvmtiVMObjectAllocEventCollector oam;
2077 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2078 bounds_check(cp, index, CHECK_0);
2079 constantTag tag = cp->tag_at(index);
2080 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2081 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2082 }
2083 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2084 }
2085 JVM_END
2086
2087 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2088 {
2089 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2090 JvmtiVMObjectAllocEventCollector oam;
2091 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 bounds_check(cp, index, CHECK_NULL);
2093 constantTag tag = cp->tag_at(index);
2094 if (!tag.is_name_and_type()) {
2095 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2096 }
2097 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2098 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2099 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2100 objArrayHandle dest(THREAD, dest_o);
2101 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2102 dest->obj_at_put(0, str());
2103 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2104 dest->obj_at_put(1, str());
2105 return (jobjectArray) JNIHandles::make_local(dest());
2106 }
2107 JVM_END
2108
2109 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2110 {
2111 JVMWrapper("JVM_ConstantPoolGetIntAt");
2112 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2113 bounds_check(cp, index, CHECK_0);
2114 constantTag tag = cp->tag_at(index);
2115 if (!tag.is_int()) {
2116 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2117 }
2118 return cp->int_at(index);
2119 }
2120 JVM_END
2121
2122 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2123 {
2124 JVMWrapper("JVM_ConstantPoolGetLongAt");
2125 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2126 bounds_check(cp, index, CHECK_(0L));
2127 constantTag tag = cp->tag_at(index);
2128 if (!tag.is_long()) {
2129 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2130 }
2131 return cp->long_at(index);
2132 }
2133 JVM_END
2134
2135 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2136 {
2137 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2138 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2139 bounds_check(cp, index, CHECK_(0.0f));
2140 constantTag tag = cp->tag_at(index);
2141 if (!tag.is_float()) {
2142 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2143 }
2144 return cp->float_at(index);
2145 }
2146 JVM_END
2147
2148 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2149 {
2150 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2151 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2152 bounds_check(cp, index, CHECK_(0.0));
2153 constantTag tag = cp->tag_at(index);
2154 if (!tag.is_double()) {
2155 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2156 }
2157 return cp->double_at(index);
2158 }
2159 JVM_END
2160
2161 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2162 {
2163 JVMWrapper("JVM_ConstantPoolGetStringAt");
2164 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2165 bounds_check(cp, index, CHECK_NULL);
2166 constantTag tag = cp->tag_at(index);
2167 if (!tag.is_string()) {
2168 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2169 }
2170 oop str = cp->string_at(index, CHECK_NULL);
2171 return (jstring) JNIHandles::make_local(str);
2172 }
2173 JVM_END
2174
2175 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2176 {
2177 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2178 JvmtiVMObjectAllocEventCollector oam;
2179 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2180 bounds_check(cp, index, CHECK_NULL);
2181 constantTag tag = cp->tag_at(index);
2182 if (!tag.is_symbol()) {
2183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2184 }
2185 Symbol* sym = cp->symbol_at(index);
2186 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2187 return (jstring) JNIHandles::make_local(str());
2188 }
2189 JVM_END
2190
2191 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2192 {
2193 JVMWrapper("JVM_ConstantPoolGetTagAt");
2194 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2195 bounds_check(cp, index, CHECK_0);
2196 constantTag tag = cp->tag_at(index);
2197 jbyte result = tag.value();
2198 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2199 // they are changed to the corresponding tags from the JVM spec, so that java code in
2200 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2201 if (tag.is_klass_or_reference()) {
2202 result = JVM_CONSTANT_Class;
2203 } else if (tag.is_string_index()) {
2204 result = JVM_CONSTANT_String;
2205 } else if (tag.is_method_type_in_error()) {
2206 result = JVM_CONSTANT_MethodType;
2207 } else if (tag.is_method_handle_in_error()) {
2208 result = JVM_CONSTANT_MethodHandle;
2209 } else if (tag.is_dynamic_constant_in_error()) {
2210 result = JVM_CONSTANT_Dynamic;
2211 }
2212 return result;
2213 }
2214 JVM_END
2215
2216 // Assertion support. //////////////////////////////////////////////////////////
2217
2218 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2219 JVMWrapper("JVM_DesiredAssertionStatus");
2220 assert(cls != NULL, "bad class");
2221
2222 oop r = JNIHandles::resolve(cls);
2223 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2224 if (java_lang_Class::is_primitive(r)) return false;
2225
2226 Klass* k = java_lang_Class::as_Klass(r);
2227 assert(k->is_instance_klass(), "must be an instance klass");
2228 if (!k->is_instance_klass()) return false;
2229
2230 ResourceMark rm(THREAD);
2231 const char* name = k->name()->as_C_string();
2232 bool system_class = k->class_loader() == NULL;
2233 return JavaAssertions::enabled(name, system_class);
2234
2235 JVM_END
2236
2237
2238 // Return a new AssertionStatusDirectives object with the fields filled in with
2239 // command-line assertion arguments (i.e., -ea, -da).
2240 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2241 JVMWrapper("JVM_AssertionStatusDirectives");
2242 JvmtiVMObjectAllocEventCollector oam;
2243 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2244 return JNIHandles::make_local(env, asd);
2245 JVM_END
2246
2247 // Arrays support /////////////////////////////////////////////////////////////
2248
2249 JVM_ENTRY(jboolean, JVM_ArrayIsAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2250 JVMWrapper("JVM_ArrayIsAccessAtomic");
2251 oop o = JNIHandles::resolve(array);
2252 Klass* k = o->klass();
2253 if ((o == NULL) || (!k->is_array_klass())) {
2254 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2255 }
2256 if (k->is_valueArray_klass()) {
2257 return ValueArrayKlass::cast(k)->is_atomic();
2258 }
2259 return true;
2260 JVM_END
2261
2262 JVM_ENTRY(jobject, JVM_ArrayEnsureAccessAtomic(JNIEnv *env, jclass unused, jobject array))
2263 JVMWrapper("JVM_ArrayEnsureAccessAtomic");
2264 oop o = JNIHandles::resolve(array);
2265 Klass* k = o->klass();
2266 if ((o == NULL) || (!k->is_array_klass())) {
2267 THROW_0(vmSymbols::java_lang_IllegalArgumentException());
2268 }
2269 if (k->is_valueArray_klass()) {
2270 ValueArrayKlass* vk = ValueArrayKlass::cast(k);
2271 if (!vk->is_atomic()) {
2272 /**
2273 * Need to decide how to implement:
2274 *
2275 * 1) Change to objArrayOop layout, therefore oop->klass() differs so
2276 * then "<atomic>[Qfoo;" klass needs to subclass "[Qfoo;" to pass through
2277 * "checkcast" & "instanceof"
2278 *
2279 * 2) Use extra header in the valueArrayOop to flag atomicity required and
2280 * possibly per instance lock structure. Said info, could be placed in
2281 * "trailer" rather than disturb the current arrayOop
2282 */
2283 Unimplemented();
2284 }
2285 }
2286 return array;
2287 JVM_END
2288
2289 // Verification ////////////////////////////////////////////////////////////////////////////////
2290
2291 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2292
2293 // RedefineClasses support: bug 6214132 caused verification to fail.
2294 // All functions from this section should call the jvmtiThreadSate function:
2295 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2296 // The function returns a Klass* of the _scratch_class if the verifier
2297 // was invoked in the middle of the class redefinition.
2298 // Otherwise it returns its argument value which is the _the_class Klass*.
2299 // Please, refer to the description in the jvmtiThreadSate.hpp.
2300
2301 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2302 JVMWrapper("JVM_GetClassNameUTF");
2303 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2304 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2305 return k->name()->as_utf8();
2306 JVM_END
2307
2308
2309 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2310 JVMWrapper("JVM_GetClassCPTypes");
2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313 // types will have length zero if this is not an InstanceKlass
2314 // (length is determined by call to JVM_GetClassCPEntriesCount)
2315 if (k->is_instance_klass()) {
2316 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2317 for (int index = cp->length() - 1; index >= 0; index--) {
2318 constantTag tag = cp->tag_at(index);
2319 types[index] = tag.is_unresolved_klass() ? JVM_CONSTANT_Class : tag.value();
2320 }
2321 }
2322 JVM_END
2323
2324
2325 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2326 JVMWrapper("JVM_GetClassCPEntriesCount");
2327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2330 JVM_END
2331
2332
2333 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2334 JVMWrapper("JVM_GetClassFieldsCount");
2335 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2336 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2337 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2338 JVM_END
2339
2340
2341 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2342 JVMWrapper("JVM_GetClassMethodsCount");
2343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2344 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2345 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2346 JVM_END
2347
2348
2349 // The following methods, used for the verifier, are never called with
2350 // array klasses, so a direct cast to InstanceKlass is safe.
2351 // Typically, these methods are called in a loop with bounds determined
2352 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2353 // zero for arrays.
2354 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2355 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2356 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2357 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2358 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2359 int length = method->checked_exceptions_length();
2360 if (length > 0) {
2361 CheckedExceptionElement* table= method->checked_exceptions_start();
2362 for (int i = 0; i < length; i++) {
2363 exceptions[i] = table[i].class_cp_index;
2364 }
2365 }
2366 JVM_END
2367
2368
2369 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2370 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2371 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2373 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2374 return method->checked_exceptions_length();
2375 JVM_END
2376
2377
2378 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2379 JVMWrapper("JVM_GetMethodIxByteCode");
2380 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2382 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2383 memcpy(code, method->code_base(), method->code_size());
2384 JVM_END
2385
2386
2387 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2388 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2389 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2390 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2391 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2392 return method->code_size();
2393 JVM_END
2394
2395
2396 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2397 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2398 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2399 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2400 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2401 ExceptionTable extable(method);
2402 entry->start_pc = extable.start_pc(entry_index);
2403 entry->end_pc = extable.end_pc(entry_index);
2404 entry->handler_pc = extable.handler_pc(entry_index);
2405 entry->catchType = extable.catch_type_index(entry_index);
2406 JVM_END
2407
2408
2409 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2410 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2412 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2413 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2414 return method->exception_table_length();
2415 JVM_END
2416
2417
2418 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2419 JVMWrapper("JVM_GetMethodIxModifiers");
2420 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2421 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2422 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2423 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2424 JVM_END
2425
2426
2427 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2428 JVMWrapper("JVM_GetFieldIxModifiers");
2429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2432 JVM_END
2433
2434
2435 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2436 JVMWrapper("JVM_GetMethodIxLocalsCount");
2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2439 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2440 return method->max_locals();
2441 JVM_END
2442
2443
2444 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2445 JVMWrapper("JVM_GetMethodIxArgsSize");
2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2448 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2449 return method->size_of_parameters();
2450 JVM_END
2451
2452
2453 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2454 JVMWrapper("JVM_GetMethodIxMaxStack");
2455 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2456 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2457 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2458 return method->verifier_max_stack();
2459 JVM_END
2460
2461
2462 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2463 JVMWrapper("JVM_IsConstructorIx");
2464 ResourceMark rm(THREAD);
2465 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2466 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2467 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2468 return method->is_object_constructor();
2469 JVM_END
2470
2471
2472 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2473 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2474 ResourceMark rm(THREAD);
2475 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2476 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2477 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2478 return method->is_overpass();
2479 JVM_END
2480
2481 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2482 JVMWrapper("JVM_GetMethodIxIxUTF");
2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2485 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2486 return method->name()->as_utf8();
2487 JVM_END
2488
2489
2490 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2491 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2493 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2494 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2495 return method->signature()->as_utf8();
2496 JVM_END
2497
2498 /**
2499 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2500 * read entries in the constant pool. Since the old verifier always
2501 * works on a copy of the code, it will not see any rewriting that
2502 * may possibly occur in the middle of verification. So it is important
2503 * that nothing it calls tries to use the cpCache instead of the raw
2504 * constant pool, so we must use cp->uncached_x methods when appropriate.
2505 */
2506 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2507 JVMWrapper("JVM_GetCPFieldNameUTF");
2508 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2509 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2510 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2511 switch (cp->tag_at(cp_index).value()) {
2512 case JVM_CONSTANT_Fieldref:
2513 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2514 default:
2515 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2516 }
2517 ShouldNotReachHere();
2518 return NULL;
2519 JVM_END
2520
2521
2522 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2523 JVMWrapper("JVM_GetCPMethodNameUTF");
2524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2525 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2526 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2527 switch (cp->tag_at(cp_index).value()) {
2528 case JVM_CONSTANT_InterfaceMethodref:
2529 case JVM_CONSTANT_Methodref:
2530 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2531 default:
2532 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2533 }
2534 ShouldNotReachHere();
2535 return NULL;
2536 JVM_END
2537
2538
2539 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2540 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2541 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2542 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2543 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2544 switch (cp->tag_at(cp_index).value()) {
2545 case JVM_CONSTANT_InterfaceMethodref:
2546 case JVM_CONSTANT_Methodref:
2547 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2548 default:
2549 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2550 }
2551 ShouldNotReachHere();
2552 return NULL;
2553 JVM_END
2554
2555
2556 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2557 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2561 switch (cp->tag_at(cp_index).value()) {
2562 case JVM_CONSTANT_Fieldref:
2563 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2564 default:
2565 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2566 }
2567 ShouldNotReachHere();
2568 return NULL;
2569 JVM_END
2570
2571
2572 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2573 JVMWrapper("JVM_GetCPClassNameUTF");
2574 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2577 Symbol* classname = cp->klass_name_at(cp_index);
2578 return classname->as_utf8();
2579 JVM_END
2580
2581
2582 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2583 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2586 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2587 switch (cp->tag_at(cp_index).value()) {
2588 case JVM_CONSTANT_Fieldref: {
2589 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2590 Symbol* classname = cp->klass_name_at(class_index);
2591 return classname->as_utf8();
2592 }
2593 default:
2594 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2595 }
2596 ShouldNotReachHere();
2597 return NULL;
2598 JVM_END
2599
2600
2601 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2602 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2603 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2604 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2605 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2606 switch (cp->tag_at(cp_index).value()) {
2607 case JVM_CONSTANT_Methodref:
2608 case JVM_CONSTANT_InterfaceMethodref: {
2609 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2610 Symbol* classname = cp->klass_name_at(class_index);
2611 return classname->as_utf8();
2612 }
2613 default:
2614 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2615 }
2616 ShouldNotReachHere();
2617 return NULL;
2618 JVM_END
2619
2620
2621 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2622 JVMWrapper("JVM_GetCPFieldModifiers");
2623 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2624 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2625 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2626 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2627 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2628 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2629 switch (cp->tag_at(cp_index).value()) {
2630 case JVM_CONSTANT_Fieldref: {
2631 Symbol* name = cp->uncached_name_ref_at(cp_index);
2632 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2633 InstanceKlass* ik = InstanceKlass::cast(k_called);
2634 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2635 if (fs.name() == name && fs.signature() == signature) {
2636 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2637 }
2638 }
2639 return -1;
2640 }
2641 default:
2642 fatal("JVM_GetCPFieldModifiers: illegal constant");
2643 }
2644 ShouldNotReachHere();
2645 return 0;
2646 JVM_END
2647
2648
2649 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2650 JVMWrapper("JVM_GetCPMethodModifiers");
2651 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2652 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2653 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2654 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2655 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2656 switch (cp->tag_at(cp_index).value()) {
2657 case JVM_CONSTANT_Methodref:
2658 case JVM_CONSTANT_InterfaceMethodref: {
2659 Symbol* name = cp->uncached_name_ref_at(cp_index);
2660 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2661 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2662 int methods_count = methods->length();
2663 for (int i = 0; i < methods_count; i++) {
2664 Method* method = methods->at(i);
2665 if (method->name() == name && method->signature() == signature) {
2666 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2667 }
2668 }
2669 return -1;
2670 }
2671 default:
2672 fatal("JVM_GetCPMethodModifiers: illegal constant");
2673 }
2674 ShouldNotReachHere();
2675 return 0;
2676 JVM_END
2677
2678
2679 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2680
2681 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2682 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2683 JVM_END
2684
2685
2686 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2687 JVMWrapper("JVM_IsSameClassPackage");
2688 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2689 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2690 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2691 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2692 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2693 JVM_END
2694
2695 // Printing support //////////////////////////////////////////////////
2696 extern "C" {
2697
2698 ATTRIBUTE_PRINTF(3, 0)
2699 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2700 // Reject count values that are negative signed values converted to
2701 // unsigned; see bug 4399518, 4417214
2702 if ((intptr_t)count <= 0) return -1;
2703
2704 int result = os::vsnprintf(str, count, fmt, args);
2705 if (result > 0 && (size_t)result >= count) {
2706 result = -1;
2707 }
2708
2709 return result;
2710 }
2711
2712 ATTRIBUTE_PRINTF(3, 4)
2713 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2714 va_list args;
2715 int len;
2716 va_start(args, fmt);
2717 len = jio_vsnprintf(str, count, fmt, args);
2718 va_end(args);
2719 return len;
2720 }
2721
2722 ATTRIBUTE_PRINTF(2, 3)
2723 int jio_fprintf(FILE* f, const char *fmt, ...) {
2724 int len;
2725 va_list args;
2726 va_start(args, fmt);
2727 len = jio_vfprintf(f, fmt, args);
2728 va_end(args);
2729 return len;
2730 }
2731
2732 ATTRIBUTE_PRINTF(2, 0)
2733 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2734 if (Arguments::vfprintf_hook() != NULL) {
2735 return Arguments::vfprintf_hook()(f, fmt, args);
2736 } else {
2737 return vfprintf(f, fmt, args);
2738 }
2739 }
2740
2741 ATTRIBUTE_PRINTF(1, 2)
2742 JNIEXPORT int jio_printf(const char *fmt, ...) {
2743 int len;
2744 va_list args;
2745 va_start(args, fmt);
2746 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2747 va_end(args);
2748 return len;
2749 }
2750
2751 // HotSpot specific jio method
2752 void jio_print(const char* s, size_t len) {
2753 // Try to make this function as atomic as possible.
2754 if (Arguments::vfprintf_hook() != NULL) {
2755 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2756 } else {
2757 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2758 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2759 }
2760 }
2761
2762 } // Extern C
2763
2764 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2765
2766 // In most of the JVM thread support functions we need to access the
2767 // thread through a ThreadsListHandle to prevent it from exiting and
2768 // being reclaimed while we try to operate on it. The exceptions to this
2769 // rule are when operating on the current thread, or if the monitor of
2770 // the target java.lang.Thread is locked at the Java level - in both
2771 // cases the target cannot exit.
2772
2773 static void thread_entry(JavaThread* thread, TRAPS) {
2774 HandleMark hm(THREAD);
2775 Handle obj(THREAD, thread->threadObj());
2776 JavaValue result(T_VOID);
2777 JavaCalls::call_virtual(&result,
2778 obj,
2779 SystemDictionary::Thread_klass(),
2780 vmSymbols::run_method_name(),
2781 vmSymbols::void_method_signature(),
2782 THREAD);
2783 }
2784
2785
2786 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2787 JVMWrapper("JVM_StartThread");
2788 JavaThread *native_thread = NULL;
2789
2790 // We cannot hold the Threads_lock when we throw an exception,
2791 // due to rank ordering issues. Example: we might need to grab the
2792 // Heap_lock while we construct the exception.
2793 bool throw_illegal_thread_state = false;
2794
2795 // We must release the Threads_lock before we can post a jvmti event
2796 // in Thread::start.
2797 {
2798 // Ensure that the C++ Thread and OSThread structures aren't freed before
2799 // we operate.
2800 MutexLocker mu(Threads_lock);
2801
2802 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2803 // re-starting an already started thread, so we should usually find
2804 // that the JavaThread is null. However for a JNI attached thread
2805 // there is a small window between the Thread object being created
2806 // (with its JavaThread set) and the update to its threadStatus, so we
2807 // have to check for this
2808 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2809 throw_illegal_thread_state = true;
2810 } else {
2811 // We could also check the stillborn flag to see if this thread was already stopped, but
2812 // for historical reasons we let the thread detect that itself when it starts running
2813
2814 jlong size =
2815 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2816 // Allocate the C++ Thread structure and create the native thread. The
2817 // stack size retrieved from java is 64-bit signed, but the constructor takes
2818 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2819 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2820 // - Avoid passing negative values which would result in really large stacks.
2821 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2822 size_t sz = size > 0 ? (size_t) size : 0;
2823 native_thread = new JavaThread(&thread_entry, sz);
2824
2825 // At this point it may be possible that no osthread was created for the
2826 // JavaThread due to lack of memory. Check for this situation and throw
2827 // an exception if necessary. Eventually we may want to change this so
2828 // that we only grab the lock if the thread was created successfully -
2829 // then we can also do this check and throw the exception in the
2830 // JavaThread constructor.
2831 if (native_thread->osthread() != NULL) {
2832 // Note: the current thread is not being used within "prepare".
2833 native_thread->prepare(jthread);
2834 }
2835 }
2836 }
2837
2838 if (throw_illegal_thread_state) {
2839 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2840 }
2841
2842 assert(native_thread != NULL, "Starting null thread?");
2843
2844 if (native_thread->osthread() == NULL) {
2845 // No one should hold a reference to the 'native_thread'.
2846 native_thread->smr_delete();
2847 if (JvmtiExport::should_post_resource_exhausted()) {
2848 JvmtiExport::post_resource_exhausted(
2849 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2850 os::native_thread_creation_failed_msg());
2851 }
2852 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2853 os::native_thread_creation_failed_msg());
2854 }
2855
2856 Thread::start(native_thread);
2857
2858 JVM_END
2859
2860
2861 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2862 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2863 // but is thought to be reliable and simple. In the case, where the receiver is the
2864 // same thread as the sender, no VM_Operation is needed.
2865 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2866 JVMWrapper("JVM_StopThread");
2867
2868 // A nested ThreadsListHandle will grab the Threads_lock so create
2869 // tlh before we resolve throwable.
2870 ThreadsListHandle tlh(thread);
2871 oop java_throwable = JNIHandles::resolve(throwable);
2872 if (java_throwable == NULL) {
2873 THROW(vmSymbols::java_lang_NullPointerException());
2874 }
2875 oop java_thread = NULL;
2876 JavaThread* receiver = NULL;
2877 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2878 Events::log_exception(thread,
2879 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2880 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2881
2882 if (is_alive) {
2883 // jthread refers to a live JavaThread.
2884 if (thread == receiver) {
2885 // Exception is getting thrown at self so no VM_Operation needed.
2886 THROW_OOP(java_throwable);
2887 } else {
2888 // Use a VM_Operation to throw the exception.
2889 Thread::send_async_exception(java_thread, java_throwable);
2890 }
2891 } else {
2892 // Either:
2893 // - target thread has not been started before being stopped, or
2894 // - target thread already terminated
2895 // We could read the threadStatus to determine which case it is
2896 // but that is overkill as it doesn't matter. We must set the
2897 // stillborn flag for the first case, and if the thread has already
2898 // exited setting this flag has no effect.
2899 java_lang_Thread::set_stillborn(java_thread);
2900 }
2901 JVM_END
2902
2903
2904 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2905 JVMWrapper("JVM_IsThreadAlive");
2906
2907 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2908 return java_lang_Thread::is_alive(thread_oop);
2909 JVM_END
2910
2911
2912 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2913 JVMWrapper("JVM_SuspendThread");
2914
2915 ThreadsListHandle tlh(thread);
2916 JavaThread* receiver = NULL;
2917 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2918 if (is_alive) {
2919 // jthread refers to a live JavaThread.
2920 {
2921 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2922 if (receiver->is_external_suspend()) {
2923 // Don't allow nested external suspend requests. We can't return
2924 // an error from this interface so just ignore the problem.
2925 return;
2926 }
2927 if (receiver->is_exiting()) { // thread is in the process of exiting
2928 return;
2929 }
2930 receiver->set_external_suspend();
2931 }
2932
2933 // java_suspend() will catch threads in the process of exiting
2934 // and will ignore them.
2935 receiver->java_suspend();
2936
2937 // It would be nice to have the following assertion in all the
2938 // time, but it is possible for a racing resume request to have
2939 // resumed this thread right after we suspended it. Temporarily
2940 // enable this assertion if you are chasing a different kind of
2941 // bug.
2942 //
2943 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2944 // receiver->is_being_ext_suspended(), "thread is not suspended");
2945 }
2946 JVM_END
2947
2948
2949 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2950 JVMWrapper("JVM_ResumeThread");
2951
2952 ThreadsListHandle tlh(thread);
2953 JavaThread* receiver = NULL;
2954 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2955 if (is_alive) {
2956 // jthread refers to a live JavaThread.
2957
2958 // This is the original comment for this Threads_lock grab:
2959 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2960 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2961 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2962 // looks at it.
2963 //
2964 // The above comment dates back to when we had both internal and
2965 // external suspend APIs that shared a common underlying mechanism.
2966 // External suspend is now entirely cooperative and doesn't share
2967 // anything with internal suspend. That said, there are some
2968 // assumptions in the VM that an external resume grabs the
2969 // Threads_lock. We can't drop the Threads_lock grab here until we
2970 // resolve the assumptions that exist elsewhere.
2971 //
2972 MutexLocker ml(Threads_lock);
2973 receiver->java_resume();
2974 }
2975 JVM_END
2976
2977
2978 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2979 JVMWrapper("JVM_SetThreadPriority");
2980
2981 ThreadsListHandle tlh(thread);
2982 oop java_thread = NULL;
2983 JavaThread* receiver = NULL;
2984 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2985 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2986
2987 if (is_alive) {
2988 // jthread refers to a live JavaThread.
2989 Thread::set_priority(receiver, (ThreadPriority)prio);
2990 }
2991 // Implied else: If the JavaThread hasn't started yet, then the
2992 // priority set in the java.lang.Thread object above will be pushed
2993 // down when it does start.
2994 JVM_END
2995
2996
2997 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2998 JVMWrapper("JVM_Yield");
2999 if (os::dont_yield()) return;
3000 HOTSPOT_THREAD_YIELD();
3001 os::naked_yield();
3002 JVM_END
3003
3004 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3005 assert(event != NULL, "invariant");
3006 assert(event->should_commit(), "invariant");
3007 event->set_time(millis);
3008 event->commit();
3009 }
3010
3011 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3012 JVMWrapper("JVM_Sleep");
3013
3014 if (millis < 0) {
3015 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3016 }
3017
3018 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3019 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3020 }
3021
3022 // Save current thread state and restore it at the end of this block.
3023 // And set new thread state to SLEEPING.
3024 JavaThreadSleepState jtss(thread);
3025
3026 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3027 EventThreadSleep event;
3028
3029 if (millis == 0) {
3030 os::naked_yield();
3031 } else {
3032 ThreadState old_state = thread->osthread()->get_state();
3033 thread->osthread()->set_state(SLEEPING);
3034 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3035 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3036 // us while we were sleeping. We do not overwrite those.
3037 if (!HAS_PENDING_EXCEPTION) {
3038 if (event.should_commit()) {
3039 post_thread_sleep_event(&event, millis);
3040 }
3041 HOTSPOT_THREAD_SLEEP_END(1);
3042
3043 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3044 // to properly restore the thread state. That's likely wrong.
3045 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3046 }
3047 }
3048 thread->osthread()->set_state(old_state);
3049 }
3050 if (event.should_commit()) {
3051 post_thread_sleep_event(&event, millis);
3052 }
3053 HOTSPOT_THREAD_SLEEP_END(0);
3054 JVM_END
3055
3056 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3057 JVMWrapper("JVM_CurrentThread");
3058 oop jthread = thread->threadObj();
3059 assert (thread != NULL, "no current thread!");
3060 return JNIHandles::make_local(env, jthread);
3061 JVM_END
3062
3063
3064 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3065 JVMWrapper("JVM_CountStackFrames");
3066
3067 uint32_t debug_bits = 0;
3068 ThreadsListHandle tlh(thread);
3069 JavaThread* receiver = NULL;
3070 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3071 int count = 0;
3072 if (is_alive) {
3073 // jthread refers to a live JavaThread.
3074 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3075 // Count all java activation, i.e., number of vframes.
3076 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3077 // Native frames are not counted.
3078 if (!vfst.method()->is_native()) count++;
3079 }
3080 } else {
3081 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3082 "this thread is not suspended");
3083 }
3084 }
3085 // Implied else: if JavaThread is not alive simply return a count of 0.
3086
3087 return count;
3088 JVM_END
3089
3090
3091 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3092 JVMWrapper("JVM_Interrupt");
3093
3094 ThreadsListHandle tlh(thread);
3095 JavaThread* receiver = NULL;
3096 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3097 if (is_alive) {
3098 // jthread refers to a live JavaThread.
3099 Thread::interrupt(receiver);
3100 }
3101 JVM_END
3102
3103
3104 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3105 JVMWrapper("JVM_IsInterrupted");
3106
3107 ThreadsListHandle tlh(thread);
3108 JavaThread* receiver = NULL;
3109 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3110 if (is_alive) {
3111 // jthread refers to a live JavaThread.
3112 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3113 } else {
3114 return JNI_FALSE;
3115 }
3116 JVM_END
3117
3118
3119 // Return true iff the current thread has locked the object passed in
3120
3121 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3122 JVMWrapper("JVM_HoldsLock");
3123 assert(THREAD->is_Java_thread(), "sanity check");
3124 if (obj == NULL) {
3125 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3126 }
3127 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3128 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3129 JVM_END
3130
3131
3132 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3133 JVMWrapper("JVM_DumpAllStacks");
3134 VM_PrintThreads op;
3135 VMThread::execute(&op);
3136 if (JvmtiExport::should_post_data_dump()) {
3137 JvmtiExport::post_data_dump();
3138 }
3139 JVM_END
3140
3141 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3142 JVMWrapper("JVM_SetNativeThreadName");
3143
3144 // We don't use a ThreadsListHandle here because the current thread
3145 // must be alive.
3146 oop java_thread = JNIHandles::resolve_non_null(jthread);
3147 JavaThread* thr = java_lang_Thread::thread(java_thread);
3148 if (thread == thr && !thr->has_attached_via_jni()) {
3149 // Thread naming is only supported for the current thread and
3150 // we don't set the name of an attached thread to avoid stepping
3151 // on other programs.
3152 ResourceMark rm(thread);
3153 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3154 os::set_native_thread_name(thread_name);
3155 }
3156 JVM_END
3157
3158 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3159
3160 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3161 JVMWrapper("JVM_GetClassContext");
3162 ResourceMark rm(THREAD);
3163 JvmtiVMObjectAllocEventCollector oam;
3164 vframeStream vfst(thread);
3165
3166 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3167 // This must only be called from SecurityManager.getClassContext
3168 Method* m = vfst.method();
3169 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3170 m->name() == vmSymbols::getClassContext_name() &&
3171 m->signature() == vmSymbols::void_class_array_signature())) {
3172 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3173 }
3174 }
3175
3176 // Collect method holders
3177 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3178 for (; !vfst.at_end(); vfst.security_next()) {
3179 Method* m = vfst.method();
3180 // Native frames are not returned
3181 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3182 Klass* holder = m->method_holder();
3183 assert(holder->is_klass(), "just checking");
3184 klass_array->append(holder);
3185 }
3186 }
3187
3188 // Create result array of type [Ljava/lang/Class;
3189 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3190 // Fill in mirrors corresponding to method holders
3191 for (int i = 0; i < klass_array->length(); i++) {
3192 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3193 }
3194
3195 return (jobjectArray) JNIHandles::make_local(env, result);
3196 JVM_END
3197
3198
3199 // java.lang.Package ////////////////////////////////////////////////////////////////
3200
3201
3202 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3203 JVMWrapper("JVM_GetSystemPackage");
3204 ResourceMark rm(THREAD);
3205 JvmtiVMObjectAllocEventCollector oam;
3206 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3207 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3208 return (jstring) JNIHandles::make_local(result);
3209 JVM_END
3210
3211
3212 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3213 JVMWrapper("JVM_GetSystemPackages");
3214 JvmtiVMObjectAllocEventCollector oam;
3215 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3216 return (jobjectArray) JNIHandles::make_local(result);
3217 JVM_END
3218
3219
3220 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3221
3222
3223 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3224 JVMWrapper("JVM_GetAndClearReferencePendingList");
3225
3226 MonitorLockerEx ml(Heap_lock);
3227 oop ref = Universe::reference_pending_list();
3228 if (ref != NULL) {
3229 Universe::set_reference_pending_list(NULL);
3230 }
3231 return JNIHandles::make_local(env, ref);
3232 JVM_END
3233
3234 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3235 JVMWrapper("JVM_HasReferencePendingList");
3236 MonitorLockerEx ml(Heap_lock);
3237 return Universe::has_reference_pending_list();
3238 JVM_END
3239
3240 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3241 JVMWrapper("JVM_WaitForReferencePendingList");
3242 MonitorLockerEx ml(Heap_lock);
3243 while (!Universe::has_reference_pending_list()) {
3244 ml.wait();
3245 }
3246 JVM_END
3247
3248
3249 // ObjectInputStream ///////////////////////////////////////////////////////////////
3250
3251 // Return the first user-defined class loader up the execution stack, or null
3252 // if only code from the bootstrap or platform class loader is on the stack.
3253
3254 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3255 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3256 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3257 oop loader = vfst.method()->method_holder()->class_loader();
3258 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3259 return JNIHandles::make_local(env, loader);
3260 }
3261 }
3262 return NULL;
3263 JVM_END
3264
3265
3266 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3267
3268
3269 // resolve array handle and check arguments
3270 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3271 if (arr == NULL) {
3272 THROW_0(vmSymbols::java_lang_NullPointerException());
3273 }
3274 oop a = JNIHandles::resolve_non_null(arr);
3275 if (!a->is_array()) {
3276 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3277 } else if (type_array_only && !a->is_typeArray()) {
3278 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3279 }
3280 return arrayOop(a);
3281 }
3282
3283
3284 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3285 JVMWrapper("JVM_GetArrayLength");
3286 arrayOop a = check_array(env, arr, false, CHECK_0);
3287 return a->length();
3288 JVM_END
3289
3290
3291 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3292 JVMWrapper("JVM_Array_Get");
3293 JvmtiVMObjectAllocEventCollector oam;
3294 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3295 jvalue value;
3296 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3297 oop box = Reflection::box(&value, type, CHECK_NULL);
3298 return JNIHandles::make_local(env, box);
3299 JVM_END
3300
3301
3302 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3303 JVMWrapper("JVM_GetPrimitiveArrayElement");
3304 jvalue value;
3305 value.i = 0; // to initialize value before getting used in CHECK
3306 arrayOop a = check_array(env, arr, true, CHECK_(value));
3307 assert(a->is_typeArray(), "just checking");
3308 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3309 BasicType wide_type = (BasicType) wCode;
3310 if (type != wide_type) {
3311 Reflection::widen(&value, type, wide_type, CHECK_(value));
3312 }
3313 return value;
3314 JVM_END
3315
3316
3317 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3318 JVMWrapper("JVM_SetArrayElement");
3319 arrayOop a = check_array(env, arr, false, CHECK);
3320 oop box = JNIHandles::resolve(val);
3321 jvalue value;
3322 value.i = 0; // to initialize value before getting used in CHECK
3323 BasicType value_type;
3324 if (a->is_objArray()) {
3325 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3326 value_type = Reflection::unbox_for_regular_object(box, &value);
3327 } else {
3328 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3329 }
3330 Reflection::array_set(&value, a, index, value_type, CHECK);
3331 JVM_END
3332
3333
3334 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3335 JVMWrapper("JVM_SetPrimitiveArrayElement");
3336 arrayOop a = check_array(env, arr, true, CHECK);
3337 assert(a->is_typeArray(), "just checking");
3338 BasicType value_type = (BasicType) vCode;
3339 Reflection::array_set(&v, a, index, value_type, CHECK);
3340 JVM_END
3341
3342
3343 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3344 JVMWrapper("JVM_NewArray");
3345 JvmtiVMObjectAllocEventCollector oam;
3346 oop element_mirror = JNIHandles::resolve(eltClass);
3347 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3348 return JNIHandles::make_local(env, result);
3349 JVM_END
3350
3351
3352 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3353 JVMWrapper("JVM_NewMultiArray");
3354 JvmtiVMObjectAllocEventCollector oam;
3355 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3356 oop element_mirror = JNIHandles::resolve(eltClass);
3357 assert(dim_array->is_typeArray(), "just checking");
3358 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3359 return JNIHandles::make_local(env, result);
3360 JVM_END
3361
3362
3363 // Library support ///////////////////////////////////////////////////////////////////////////
3364
3365 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3366 //%note jvm_ct
3367 JVMWrapper("JVM_LoadLibrary");
3368 char ebuf[1024];
3369 void *load_result;
3370 {
3371 ThreadToNativeFromVM ttnfvm(thread);
3372 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3373 }
3374 if (load_result == NULL) {
3375 char msg[1024];
3376 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3377 // Since 'ebuf' may contain a string encoded using
3378 // platform encoding scheme, we need to pass
3379 // Exceptions::unsafe_to_utf8 to the new_exception method
3380 // as the last argument. See bug 6367357.
3381 Handle h_exception =
3382 Exceptions::new_exception(thread,
3383 vmSymbols::java_lang_UnsatisfiedLinkError(),
3384 msg, Exceptions::unsafe_to_utf8);
3385
3386 THROW_HANDLE_0(h_exception);
3387 }
3388 return load_result;
3389 JVM_END
3390
3391
3392 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3393 JVMWrapper("JVM_UnloadLibrary");
3394 os::dll_unload(handle);
3395 JVM_END
3396
3397
3398 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3399 JVMWrapper("JVM_FindLibraryEntry");
3400 return os::dll_lookup(handle, name);
3401 JVM_END
3402
3403
3404 // JNI version ///////////////////////////////////////////////////////////////////////////////
3405
3406 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3407 JVMWrapper("JVM_IsSupportedJNIVersion");
3408 return Threads::is_supported_jni_version_including_1_1(version);
3409 JVM_END
3410
3411
3412 // String support ///////////////////////////////////////////////////////////////////////////
3413
3414 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3415 JVMWrapper("JVM_InternString");
3416 JvmtiVMObjectAllocEventCollector oam;
3417 if (str == NULL) return NULL;
3418 oop string = JNIHandles::resolve_non_null(str);
3419 oop result = StringTable::intern(string, CHECK_NULL);
3420 return (jstring) JNIHandles::make_local(env, result);
3421 JVM_END
3422
3423
3424 // Raw monitor support //////////////////////////////////////////////////////////////////////
3425
3426 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3427 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3428 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3429 // that only works with java threads.
3430
3431
3432 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3433 VM_Exit::block_if_vm_exited();
3434 JVMWrapper("JVM_RawMonitorCreate");
3435 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3436 }
3437
3438
3439 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3440 VM_Exit::block_if_vm_exited();
3441 JVMWrapper("JVM_RawMonitorDestroy");
3442 delete ((Mutex*) mon);
3443 }
3444
3445
3446 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3447 VM_Exit::block_if_vm_exited();
3448 JVMWrapper("JVM_RawMonitorEnter");
3449 ((Mutex*) mon)->jvm_raw_lock();
3450 return 0;
3451 }
3452
3453
3454 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3455 VM_Exit::block_if_vm_exited();
3456 JVMWrapper("JVM_RawMonitorExit");
3457 ((Mutex*) mon)->jvm_raw_unlock();
3458 }
3459
3460
3461 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3462
3463 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3464 Handle loader, Handle protection_domain,
3465 jboolean throwError, TRAPS) {
3466 // Security Note:
3467 // The Java level wrapper will perform the necessary security check allowing
3468 // us to pass the NULL as the initiating class loader. The VM is responsible for
3469 // the checkPackageAccess relative to the initiating class loader via the
3470 // protection_domain. The protection_domain is passed as NULL by the java code
3471 // if there is no security manager in 3-arg Class.forName().
3472 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3473
3474 // Check if we should initialize the class
3475 if (init && klass->is_instance_klass()) {
3476 klass->initialize(CHECK_NULL);
3477 }
3478 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3479 }
3480
3481
3482 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3483
3484 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3485 JVMWrapper("JVM_InvokeMethod");
3486 Handle method_handle;
3487 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3488 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3489 Handle receiver(THREAD, JNIHandles::resolve(obj));
3490 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3491 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3492 jobject res = JNIHandles::make_local(env, result);
3493 if (JvmtiExport::should_post_vm_object_alloc()) {
3494 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3495 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3496 if (java_lang_Class::is_primitive(ret_type)) {
3497 // Only for primitive type vm allocates memory for java object.
3498 // See box() method.
3499 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3500 }
3501 }
3502 return res;
3503 } else {
3504 THROW_0(vmSymbols::java_lang_StackOverflowError());
3505 }
3506 JVM_END
3507
3508
3509 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3510 JVMWrapper("JVM_NewInstanceFromConstructor");
3511 oop constructor_mirror = JNIHandles::resolve(c);
3512 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3513 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3514 jobject res = JNIHandles::make_local(env, result);
3515 if (JvmtiExport::should_post_vm_object_alloc()) {
3516 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3517 }
3518 return res;
3519 JVM_END
3520
3521 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3522
3523 JVM_LEAF(jboolean, JVM_SupportsCX8())
3524 JVMWrapper("JVM_SupportsCX8");
3525 return VM_Version::supports_cx8();
3526 JVM_END
3527
3528 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3529 JVMWrapper("JVM_InitializeFromArchive");
3530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3531 assert(k->is_klass(), "just checking");
3532 HeapShared::initialize_from_archived_subgraph(k);
3533 JVM_END
3534
3535 // Returns an array of all live Thread objects (VM internal JavaThreads,
3536 // jvmti agent threads, and JNI attaching threads are skipped)
3537 // See CR 6404306 regarding JNI attaching threads
3538 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3539 ResourceMark rm(THREAD);
3540 ThreadsListEnumerator tle(THREAD, false, false);
3541 JvmtiVMObjectAllocEventCollector oam;
3542
3543 int num_threads = tle.num_threads();
3544 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3545 objArrayHandle threads_ah(THREAD, r);
3546
3547 for (int i = 0; i < num_threads; i++) {
3548 Handle h = tle.get_threadObj(i);
3549 threads_ah->obj_at_put(i, h());
3550 }
3551
3552 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3553 JVM_END
3554
3555
3556 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3557 // Return StackTraceElement[][], each element is the stack trace of a thread in
3558 // the corresponding entry in the given threads array
3559 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3560 JVMWrapper("JVM_DumpThreads");
3561 JvmtiVMObjectAllocEventCollector oam;
3562
3563 // Check if threads is null
3564 if (threads == NULL) {
3565 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3566 }
3567
3568 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3569 objArrayHandle ah(THREAD, a);
3570 int num_threads = ah->length();
3571 // check if threads is non-empty array
3572 if (num_threads == 0) {
3573 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3574 }
3575
3576 // check if threads is not an array of objects of Thread class
3577 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3578 if (k != SystemDictionary::Thread_klass()) {
3579 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3580 }
3581
3582 ResourceMark rm(THREAD);
3583
3584 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3585 for (int i = 0; i < num_threads; i++) {
3586 oop thread_obj = ah->obj_at(i);
3587 instanceHandle h(THREAD, (instanceOop) thread_obj);
3588 thread_handle_array->append(h);
3589 }
3590
3591 // The JavaThread references in thread_handle_array are validated
3592 // in VM_ThreadDump::doit().
3593 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3594 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3595
3596 JVM_END
3597
3598 // JVM monitoring and management support
3599 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3600 return Management::get_jmm_interface(version);
3601 JVM_END
3602
3603 // com.sun.tools.attach.VirtualMachine agent properties support
3604 //
3605 // Initialize the agent properties with the properties maintained in the VM
3606 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3607 JVMWrapper("JVM_InitAgentProperties");
3608 ResourceMark rm;
3609
3610 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3611
3612 PUTPROP(props, "sun.java.command", Arguments::java_command());
3613 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3614 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3615 return properties;
3616 JVM_END
3617
3618 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3619 {
3620 JVMWrapper("JVM_GetEnclosingMethodInfo");
3621 JvmtiVMObjectAllocEventCollector oam;
3622
3623 if (ofClass == NULL) {
3624 return NULL;
3625 }
3626 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3627 // Special handling for primitive objects
3628 if (java_lang_Class::is_primitive(mirror())) {
3629 return NULL;
3630 }
3631 Klass* k = java_lang_Class::as_Klass(mirror());
3632 if (!k->is_instance_klass()) {
3633 return NULL;
3634 }
3635 InstanceKlass* ik = InstanceKlass::cast(k);
3636 int encl_method_class_idx = ik->enclosing_method_class_index();
3637 if (encl_method_class_idx == 0) {
3638 return NULL;
3639 }
3640 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3641 objArrayHandle dest(THREAD, dest_o);
3642 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3643 dest->obj_at_put(0, enc_k->java_mirror());
3644 int encl_method_method_idx = ik->enclosing_method_method_index();
3645 if (encl_method_method_idx != 0) {
3646 Symbol* sym = ik->constants()->symbol_at(
3647 extract_low_short_from_int(
3648 ik->constants()->name_and_type_at(encl_method_method_idx)));
3649 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3650 dest->obj_at_put(1, str());
3651 sym = ik->constants()->symbol_at(
3652 extract_high_short_from_int(
3653 ik->constants()->name_and_type_at(encl_method_method_idx)));
3654 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3655 dest->obj_at_put(2, str());
3656 }
3657 return (jobjectArray) JNIHandles::make_local(dest());
3658 }
3659 JVM_END
3660
3661 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3662 {
3663 memset(info, 0, info_size);
3664
3665 info->jvm_version = VM_Version::jvm_version();
3666 info->patch_version = VM_Version::vm_patch_version();
3667
3668 // when we add a new capability in the jvm_version_info struct, we should also
3669 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3670 // counter defined in runtimeService.cpp.
3671 info->is_attach_supported = AttachListener::is_attach_supported();
3672 }
3673 JVM_END
3674
3675 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3676 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3677 ResourceMark rm(THREAD);
3678
3679 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3680 return NULL;
3681 }
3682
3683 char** vm_flags = Arguments::jvm_flags_array();
3684 char** vm_args = Arguments::jvm_args_array();
3685 int num_flags = Arguments::num_jvm_flags();
3686 int num_args = Arguments::num_jvm_args();
3687
3688 InstanceKlass* ik = SystemDictionary::String_klass();
3689 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3690 objArrayHandle result_h(THREAD, r);
3691
3692 int index = 0;
3693 for (int j = 0; j < num_flags; j++, index++) {
3694 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3695 result_h->obj_at_put(index, h());
3696 }
3697 for (int i = 0; i < num_args; i++, index++) {
3698 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3699 result_h->obj_at_put(index, h());
3700 }
3701 return (jobjectArray) JNIHandles::make_local(env, result_h());
3702 JVM_END
3703
3704 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3705 return os::get_signal_number(name);
3706 JVM_END