1 /*
2 * Copyright (c) 1997, 2017, 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 "memory/oopFactory.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "memory/universe.inline.hpp"
43 #include "oops/access.inline.hpp"
44 #include "oops/fieldStreams.hpp"
45 #include "oops/instanceKlass.hpp"
46 #include "oops/method.hpp"
47 #include "oops/objArrayKlass.hpp"
48 #include "oops/objArrayOop.inline.hpp"
49 #include "oops/oop.inline.hpp"
50 #include "prims/jvm_misc.hpp"
51 #include "prims/jvmtiExport.hpp"
52 #include "prims/jvmtiThreadState.hpp"
53 #include "prims/nativeLookup.hpp"
54 #include "prims/privilegedStack.hpp"
55 #include "prims/stackwalk.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/atomic.hpp"
58 #include "runtime/handles.inline.hpp"
59 #include "runtime/init.hpp"
60 #include "runtime/interfaceSupport.hpp"
61 #include "runtime/java.hpp"
62 #include "runtime/javaCalls.hpp"
63 #include "runtime/jfieldIDWorkaround.hpp"
64 #include "runtime/orderAccess.inline.hpp"
65 #include "runtime/os.inline.hpp"
66 #include "runtime/perfData.hpp"
67 #include "runtime/reflection.hpp"
68 #include "runtime/thread.inline.hpp"
69 #include "runtime/threadSMR.hpp"
70 #include "runtime/vframe.hpp"
71 #include "runtime/vm_operations.hpp"
72 #include "runtime/vm_version.hpp"
73 #include "services/attachListener.hpp"
74 #include "services/management.hpp"
75 #include "services/threadService.hpp"
76 #include "trace/tracing.hpp"
77 #include "utilities/copy.hpp"
78 #include "utilities/defaultStream.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/histogram.hpp"
82 #include "utilities/macros.hpp"
83 #include "utilities/utf8.hpp"
84 #if INCLUDE_CDS
85 #include "classfile/sharedClassUtil.hpp"
86 #include "classfile/systemDictionaryShared.hpp"
87 #endif
88
89 #include <errno.h>
90
91 /*
92 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
93 such ctors and calls MUST NOT come between an oop declaration/init and its
94 usage because if objects are move this may cause various memory stomps, bus
95 errors and segfaults. Here is a cookbook for causing so called "naked oop
96 failures":
97
98 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
99 JVMWrapper("JVM_GetClassDeclaredFields");
100
101 // Object address to be held directly in mirror & not visible to GC
102 oop mirror = JNIHandles::resolve_non_null(ofClass);
103
104 // If this ctor can hit a safepoint, moving objects around, then
105 ComplexConstructor foo;
106
107 // Boom! mirror may point to JUNK instead of the intended object
108 (some dereference of mirror)
109
110 // Here's another call that may block for GC, making mirror stale
111 MutexLocker ml(some_lock);
112
113 // And here's an initializer that can result in a stale oop
114 // all in one step.
115 oop o = call_that_can_throw_exception(TRAPS);
116
117
118 The solution is to keep the oop declaration BELOW the ctor or function
119 call that might cause a GC, do another resolve to reassign the oop, or
120 consider use of a Handle instead of an oop so there is immunity from object
121 motion. But note that the "QUICK" entries below do not have a handlemark
122 and thus can only support use of handles passed in.
123 */
124
125 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
126 ResourceMark rm;
127 int line_number = -1;
128 const char * source_file = NULL;
129 const char * trace = "explicit";
130 InstanceKlass* caller = NULL;
131 JavaThread* jthread = JavaThread::current();
132 if (jthread->has_last_Java_frame()) {
133 vframeStream vfst(jthread);
134
135 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
136 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
137 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
138 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
139 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
140
141 Method* last_caller = NULL;
142
143 while (!vfst.at_end()) {
144 Method* m = vfst.method();
145 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
146 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
147 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
148 break;
149 }
150 last_caller = m;
151 vfst.next();
152 }
153 // if this is called from Class.forName0 and that is called from Class.forName,
154 // then print the caller of Class.forName. If this is Class.loadClass, then print
155 // that caller, otherwise keep quiet since this should be picked up elsewhere.
156 bool found_it = false;
157 if (!vfst.at_end() &&
158 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
159 vfst.method()->name() == vmSymbols::forName0_name()) {
160 vfst.next();
161 if (!vfst.at_end() &&
162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
163 vfst.method()->name() == vmSymbols::forName_name()) {
164 vfst.next();
165 found_it = true;
166 }
167 } else if (last_caller != NULL &&
168 last_caller->method_holder()->name() ==
169 vmSymbols::java_lang_ClassLoader() &&
170 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
171 last_caller->name() == vmSymbols::loadClass_name())) {
172 found_it = true;
173 } else if (!vfst.at_end()) {
174 if (vfst.method()->is_native()) {
175 // JNI call
176 found_it = true;
177 }
178 }
179 if (found_it && !vfst.at_end()) {
180 // found the caller
181 caller = vfst.method()->method_holder();
182 line_number = vfst.method()->line_number_from_bci(vfst.bci());
183 if (line_number == -1) {
184 // show method name if it's a native method
185 trace = vfst.method()->name_and_sig_as_C_string();
186 }
187 Symbol* s = caller->source_file_name();
188 if (s != NULL) {
189 source_file = s->as_C_string();
190 }
191 }
192 }
193 if (caller != NULL) {
194 if (to_class != caller) {
195 const char * from = caller->external_name();
196 const char * to = to_class->external_name();
197 // print in a single call to reduce interleaving between threads
198 if (source_file != NULL) {
199 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
200 } else {
201 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
202 }
203 }
204 }
205 }
206
207 void trace_class_resolution(Klass* to_class) {
208 EXCEPTION_MARK;
209 trace_class_resolution_impl(to_class, THREAD);
210 if (HAS_PENDING_EXCEPTION) {
211 CLEAR_PENDING_EXCEPTION;
212 }
213 }
214
215 // Wrapper to trace JVM functions
216
217 #ifdef ASSERT
218 Histogram* JVMHistogram;
219 volatile int JVMHistogram_lock = 0;
220
221 class JVMHistogramElement : public HistogramElement {
222 public:
223 JVMHistogramElement(const char* name);
224 };
225
226 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
227 _name = elementName;
228 uintx count = 0;
229
230 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
231 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
232 count +=1;
233 if ( (WarnOnStalledSpinLock > 0)
234 && (count % WarnOnStalledSpinLock == 0)) {
235 warning("JVMHistogram_lock seems to be stalled");
236 }
237 }
238 }
239
240 if(JVMHistogram == NULL)
241 JVMHistogram = new Histogram("JVM Call Counts",100);
242
243 JVMHistogram->add_element(this);
244 Atomic::dec(&JVMHistogram_lock);
245 }
246
247 #define JVMCountWrapper(arg) \
248 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
249 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
250
251 #define JVMWrapper(arg) JVMCountWrapper(arg);
252 #else
253 #define JVMWrapper(arg)
254 #endif
255
256
257 // Interface version /////////////////////////////////////////////////////////////////////
258
259
260 JVM_LEAF(jint, JVM_GetInterfaceVersion())
261 return JVM_INTERFACE_VERSION;
262 JVM_END
263
264
265 // java.lang.System //////////////////////////////////////////////////////////////////////
266
267
268 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
269 JVMWrapper("JVM_CurrentTimeMillis");
270 return os::javaTimeMillis();
271 JVM_END
272
273 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
274 JVMWrapper("JVM_NanoTime");
275 return os::javaTimeNanos();
276 JVM_END
277
278 // The function below is actually exposed by jdk.internal.misc.VM and not
279 // java.lang.System, but we choose to keep it here so that it stays next
280 // to JVM_CurrentTimeMillis and JVM_NanoTime
281
282 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
283 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
284
285 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
286 JVMWrapper("JVM_GetNanoTimeAdjustment");
287 jlong seconds;
288 jlong nanos;
289
290 os::javaTimeSystemUTC(seconds, nanos);
291
292 // We're going to verify that the result can fit in a long.
293 // For that we need the difference in seconds between 'seconds'
294 // and 'offset_secs' to be such that:
295 // |seconds - offset_secs| < (2^63/10^9)
296 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
297 // which makes |seconds - offset_secs| < 2^33
298 // and we will prefer +/- 2^32 as the maximum acceptable diff
299 // as 2^32 has a more natural feel than 2^33...
300 //
301 // So if |seconds - offset_secs| >= 2^32 - we return a special
302 // sentinel value (-1) which the caller should take as an
303 // exception value indicating that the offset given to us is
304 // too far from range of the current time - leading to too big
305 // a nano adjustment. The caller is expected to recover by
306 // computing a more accurate offset and calling this method
307 // again. (For the record 2^32 secs is ~136 years, so that
308 // should rarely happen)
309 //
310 jlong diff = seconds - offset_secs;
311 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
312 return -1; // sentinel value: the offset is too far off the target
313 }
314
315 // return the adjustment. If you compute a time by adding
316 // this number of nanoseconds along with the number of seconds
317 // in the offset you should get the current UTC time.
318 return (diff * (jlong)1000000000) + nanos;
319 JVM_END
320
321 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
322 jobject dst, jint dst_pos, jint length))
323 JVMWrapper("JVM_ArrayCopy");
324 // Check if we have null pointers
325 if (src == NULL || dst == NULL) {
326 THROW(vmSymbols::java_lang_NullPointerException());
327 }
328 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
329 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
330 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
331 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
332 // Do copy
333 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
334 JVM_END
335
336
337 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
338 JavaValue r(T_OBJECT);
339 // public synchronized Object put(Object key, Object value);
340 HandleMark hm(THREAD);
341 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
342 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
343 JavaCalls::call_virtual(&r,
344 props,
345 SystemDictionary::Properties_klass(),
346 vmSymbols::put_name(),
347 vmSymbols::object_object_object_signature(),
348 key_str,
349 value_str,
350 THREAD);
351 }
352
353
354 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
355
356
357 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
358 JVMWrapper("JVM_InitProperties");
359 ResourceMark rm;
360
361 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
362
363 // System property list includes both user set via -D option and
364 // jvm system specific properties.
365 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
366 PUTPROP(props, p->key(), p->value());
367 }
368
369 // Convert the -XX:MaxDirectMemorySize= command line flag
370 // to the sun.nio.MaxDirectMemorySize property.
371 // Do this after setting user properties to prevent people
372 // from setting the value with a -D option, as requested.
373 {
374 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
375 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
376 } else {
377 char as_chars[256];
378 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
379 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
380 }
381 }
382
383 // JVM monitoring and management support
384 // Add the sun.management.compiler property for the compiler's name
385 {
386 #undef CSIZE
387 #if defined(_LP64) || defined(_WIN64)
388 #define CSIZE "64-Bit "
389 #else
390 #define CSIZE
391 #endif // 64bit
392
393 #ifdef TIERED
394 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
395 #else
396 #if defined(COMPILER1)
397 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
398 #elif defined(COMPILER2)
399 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
400 #elif INCLUDE_JVMCI
401 #error "INCLUDE_JVMCI should imply TIERED"
402 #else
403 const char* compiler_name = "";
404 #endif // compilers
405 #endif // TIERED
406
407 if (*compiler_name != '\0' &&
408 (Arguments::mode() != Arguments::_int)) {
409 PUTPROP(props, "sun.management.compiler", compiler_name);
410 }
411 }
412
413 return properties;
414 JVM_END
415
416
417 /*
418 * Return the temporary directory that the VM uses for the attach
419 * and perf data files.
420 *
421 * It is important that this directory is well-known and the
422 * same for all VM instances. It cannot be affected by configuration
423 * variables such as java.io.tmpdir.
424 */
425 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
426 JVMWrapper("JVM_GetTemporaryDirectory");
427 HandleMark hm(THREAD);
428 const char* temp_dir = os::get_temp_directory();
429 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
430 return (jstring) JNIHandles::make_local(env, h());
431 JVM_END
432
433
434 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
435
436 extern volatile jint vm_created;
437
438 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
439 before_exit(thread);
440 vm_exit(code);
441 JVM_END
442
443
444 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
445 JVMWrapper("JVM_GC");
446 if (!DisableExplicitGC) {
447 Universe::heap()->collect(GCCause::_java_lang_system_gc);
448 }
449 JVM_END
450
451
452 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
453 JVMWrapper("JVM_MaxObjectInspectionAge");
454 return Universe::heap()->millis_since_last_gc();
455 JVM_END
456
457
458 static inline jlong convert_size_t_to_jlong(size_t val) {
459 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
460 NOT_LP64 (return (jlong)val;)
461 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
462 }
463
464 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
465 JVMWrapper("JVM_TotalMemory");
466 size_t n = Universe::heap()->capacity();
467 return convert_size_t_to_jlong(n);
468 JVM_END
469
470
471 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
472 JVMWrapper("JVM_FreeMemory");
473 CollectedHeap* ch = Universe::heap();
474 size_t n;
475 {
476 MutexLocker x(Heap_lock);
477 n = ch->capacity() - ch->used();
478 }
479 return convert_size_t_to_jlong(n);
480 JVM_END
481
482
483 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
484 JVMWrapper("JVM_MaxMemory");
485 size_t n = Universe::heap()->max_capacity();
486 return convert_size_t_to_jlong(n);
487 JVM_END
488
489
490 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
491 JVMWrapper("JVM_ActiveProcessorCount");
492 return os::active_processor_count();
493 JVM_END
494
495
496
497 // java.lang.Throwable //////////////////////////////////////////////////////
498
499
500 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
501 JVMWrapper("JVM_FillInStackTrace");
502 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
503 java_lang_Throwable::fill_in_stack_trace(exception);
504 JVM_END
505
506
507 // java.lang.StackTraceElement //////////////////////////////////////////////
508
509
510 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
511 JVMWrapper("JVM_InitStackTraceElementArray");
512 Handle exception(THREAD, JNIHandles::resolve(throwable));
513 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
514 objArrayHandle stack_trace(THREAD, st);
515 // Fill in the allocated stack trace
516 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
517 JVM_END
518
519
520 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
521 JVMWrapper("JVM_InitStackTraceElement");
522 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
523 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
524 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
525 JVM_END
526
527
528 // java.lang.StackWalker //////////////////////////////////////////////////////
529
530
531 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
532 jint skip_frames, jint frame_count, jint start_index,
533 jobjectArray frames))
534 JVMWrapper("JVM_CallStackWalk");
535 JavaThread* jt = (JavaThread*) THREAD;
536 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
537 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
538 }
539
540 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
541
542 // frames array is a Class<?>[] array when only getting caller reference,
543 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
544 // be null.
545 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
546 objArrayHandle frames_array_h(THREAD, fa);
547
548 int limit = start_index + frame_count;
549 if (frames_array_h->length() < limit) {
550 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
551 }
552
553 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
554 start_index, frames_array_h, CHECK_NULL);
555 return JNIHandles::make_local(env, result);
556 JVM_END
557
558
559 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
560 jint frame_count, jint start_index,
561 jobjectArray frames))
562 JVMWrapper("JVM_MoreStackWalk");
563 JavaThread* jt = (JavaThread*) THREAD;
564
565 // frames array is a Class<?>[] array when only getting caller reference,
566 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
567 // be null.
568 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
569 objArrayHandle frames_array_h(THREAD, fa);
570
571 int limit = start_index+frame_count;
572 if (frames_array_h->length() < limit) {
573 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
574 }
575
576 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
577 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
578 start_index, frames_array_h, THREAD);
579 JVM_END
580
581 // java.lang.Object ///////////////////////////////////////////////
582
583
584 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
585 JVMWrapper("JVM_IHashCode");
586 // as implemented in the classic virtual machine; return 0 if object is NULL
587 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
588 JVM_END
589
590
591 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
592 JVMWrapper("JVM_MonitorWait");
593 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
594 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
595 if (JvmtiExport::should_post_monitor_wait()) {
596 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
597
598 // The current thread already owns the monitor and it has not yet
599 // been added to the wait queue so the current thread cannot be
600 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
601 // event handler cannot accidentally consume an unpark() meant for
602 // the ParkEvent associated with this ObjectMonitor.
603 }
604 ObjectSynchronizer::wait(obj, ms, CHECK);
605 JVM_END
606
607
608 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
609 JVMWrapper("JVM_MonitorNotify");
610 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
611 ObjectSynchronizer::notify(obj, CHECK);
612 JVM_END
613
614
615 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
616 JVMWrapper("JVM_MonitorNotifyAll");
617 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
618 ObjectSynchronizer::notifyall(obj, CHECK);
619 JVM_END
620
621
622 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
623 JVMWrapper("JVM_Clone");
624 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
625 Klass* klass = obj->klass();
626 JvmtiVMObjectAllocEventCollector oam;
627
628 #ifdef ASSERT
629 // Just checking that the cloneable flag is set correct
630 if (obj->is_array()) {
631 guarantee(klass->is_cloneable(), "all arrays are cloneable");
632 } else {
633 guarantee(obj->is_instance(), "should be instanceOop");
634 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
635 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
636 }
637 #endif
638
639 // Check if class of obj supports the Cloneable interface.
640 // All arrays are considered to be cloneable (See JLS 20.1.5)
641 if (!klass->is_cloneable()) {
642 ResourceMark rm(THREAD);
643 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
644 }
645
646 // Make shallow object copy
647 const int size = obj->size();
648 oop new_obj_oop = NULL;
649 if (obj->is_array()) {
650 const int length = ((arrayOop)obj())->length();
651 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
652 } else {
653 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
654 }
655
656 HeapAccess<>::clone(obj(), new_obj_oop, size);
657
658 Handle new_obj(THREAD, new_obj_oop);
659 // Caution: this involves a java upcall, so the clone should be
660 // "gc-robust" by this stage.
661 if (klass->has_finalizer()) {
662 assert(obj->is_instance(), "should be instanceOop");
663 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
664 new_obj = Handle(THREAD, new_obj_oop);
665 }
666
667 return JNIHandles::make_local(env, new_obj());
668 JVM_END
669
670 // java.io.File ///////////////////////////////////////////////////////////////
671
672 JVM_LEAF(char*, JVM_NativePath(char* path))
673 JVMWrapper("JVM_NativePath");
674 return os::native_path(path);
675 JVM_END
676
677
678 // Misc. class handling ///////////////////////////////////////////////////////////
679
680
681 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
682 JVMWrapper("JVM_GetCallerClass");
683
684 // Getting the class of the caller frame.
685 //
686 // The call stack at this point looks something like this:
687 //
688 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
689 // [1] [ @CallerSensitive API.method ]
690 // [.] [ (skipped intermediate frames) ]
691 // [n] [ caller ]
692 vframeStream vfst(thread);
693 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
694 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
695 Method* m = vfst.method();
696 assert(m != NULL, "sanity");
697 switch (n) {
698 case 0:
699 // This must only be called from Reflection.getCallerClass
700 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
701 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
702 }
703 // fall-through
704 case 1:
705 // Frame 0 and 1 must be caller sensitive.
706 if (!m->caller_sensitive()) {
707 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
708 }
709 break;
710 default:
711 if (!m->is_ignored_by_security_stack_walk()) {
712 // We have reached the desired frame; return the holder class.
713 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
714 }
715 break;
716 }
717 }
718 return NULL;
719 JVM_END
720
721
722 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
723 JVMWrapper("JVM_FindPrimitiveClass");
724 oop mirror = NULL;
725 BasicType t = name2type(utf);
726 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
727 mirror = Universe::java_mirror(t);
728 }
729 if (mirror == NULL) {
730 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
731 } else {
732 return (jclass) JNIHandles::make_local(env, mirror);
733 }
734 JVM_END
735
736
737 // Returns a class loaded by the bootstrap class loader; or null
738 // if not found. ClassNotFoundException is not thrown.
739 // FindClassFromBootLoader is exported to the launcher for windows.
740 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
741 const char* name))
742 JVMWrapper("JVM_FindClassFromBootLoader");
743
744 // Java libraries should ensure that name is never null...
745 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
746 // It's impossible to create this class; the name cannot fit
747 // into the constant pool.
748 return NULL;
749 }
750
751 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
752 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
753 if (k == NULL) {
754 return NULL;
755 }
756
757 if (log_is_enabled(Debug, class, resolve)) {
758 trace_class_resolution(k);
759 }
760 return (jclass) JNIHandles::make_local(env, k->java_mirror());
761 JVM_END
762
763 // Find a class with this name in this loader, using the caller's protection domain.
764 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
765 jboolean init, jobject loader,
766 jclass caller))
767 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
768 // Java libraries should ensure that name is never null...
769 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
770 // It's impossible to create this class; the name cannot fit
771 // into the constant pool.
772 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
773 }
774
775 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
776
777 oop loader_oop = JNIHandles::resolve(loader);
778 oop from_class = JNIHandles::resolve(caller);
779 oop protection_domain = NULL;
780 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
781 // NPE. Put it in another way, the bootstrap class loader has all permission and
782 // thus no checkPackageAccess equivalence in the VM class loader.
783 // The caller is also passed as NULL by the java code if there is no security
784 // manager to avoid the performance cost of getting the calling class.
785 if (from_class != NULL && loader_oop != NULL) {
786 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
787 }
788
789 Handle h_loader(THREAD, loader_oop);
790 Handle h_prot(THREAD, protection_domain);
791 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
792 h_prot, false, THREAD);
793
794 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
795 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
796 }
797 return result;
798 JVM_END
799
800 // Currently only called from the old verifier.
801 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
802 jboolean init, jclass from))
803 JVMWrapper("JVM_FindClassFromClass");
804 if (name == NULL) {
805 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
806 }
807 if ((int)strlen(name) > Symbol::max_length()) {
808 // It's impossible to create this class; the name cannot fit
809 // into the constant pool.
810 Exceptions::fthrow(THREAD_AND_LOCATION,
811 vmSymbols::java_lang_NoClassDefFoundError(),
812 "Class name exceeds maximum length of %d: %s",
813 Symbol::max_length(),
814 name);
815 return 0;
816 }
817 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
818 oop from_class_oop = JNIHandles::resolve(from);
819 Klass* from_class = (from_class_oop == NULL)
820 ? (Klass*)NULL
821 : java_lang_Class::as_Klass(from_class_oop);
822 oop class_loader = NULL;
823 oop protection_domain = NULL;
824 if (from_class != NULL) {
825 class_loader = from_class->class_loader();
826 protection_domain = from_class->protection_domain();
827 }
828 Handle h_loader(THREAD, class_loader);
829 Handle h_prot (THREAD, protection_domain);
830 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
831 h_prot, true, thread);
832
833 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
834 // this function is generally only used for class loading during verification.
835 ResourceMark rm;
836 oop from_mirror = JNIHandles::resolve_non_null(from);
837 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
838 const char * from_name = from_class->external_name();
839
840 oop mirror = JNIHandles::resolve_non_null(result);
841 Klass* to_class = java_lang_Class::as_Klass(mirror);
842 const char * to = to_class->external_name();
843 log_debug(class, resolve)("%s %s (verification)", from_name, to);
844 }
845
846 return result;
847 JVM_END
848
849 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
850 if (loader.is_null()) {
851 return;
852 }
853
854 // check whether the current caller thread holds the lock or not.
855 // If not, increment the corresponding counter
856 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
857 ObjectSynchronizer::owner_self) {
858 counter->inc();
859 }
860 }
861
862 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
863 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
864 jobject loader, const jbyte *buf,
865 jsize len, jobject pd, const char *source,
866 TRAPS) {
867 if (source == NULL) source = "__JVM_DefineClass__";
868
869 assert(THREAD->is_Java_thread(), "must be a JavaThread");
870 JavaThread* jt = (JavaThread*) THREAD;
871
872 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
873 ClassLoader::perf_define_appclass_selftime(),
874 ClassLoader::perf_define_appclasses(),
875 jt->get_thread_stat()->perf_recursion_counts_addr(),
876 jt->get_thread_stat()->perf_timers_addr(),
877 PerfClassTraceTime::DEFINE_CLASS);
878
879 if (UsePerfData) {
880 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
881 }
882
883 // Since exceptions can be thrown, class initialization can take place
884 // if name is NULL no check for class name in .class stream has to be made.
885 TempNewSymbol class_name = NULL;
886 if (name != NULL) {
887 const int str_len = (int)strlen(name);
888 if (str_len > Symbol::max_length()) {
889 // It's impossible to create this class; the name cannot fit
890 // into the constant pool.
891 Exceptions::fthrow(THREAD_AND_LOCATION,
892 vmSymbols::java_lang_NoClassDefFoundError(),
893 "Class name exceeds maximum length of %d: %s",
894 Symbol::max_length(),
895 name);
896 return 0;
897 }
898 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
899 }
900
901 ResourceMark rm(THREAD);
902 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
903 Handle class_loader (THREAD, JNIHandles::resolve(loader));
904 if (UsePerfData) {
905 is_lock_held_by_thread(class_loader,
906 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
907 THREAD);
908 }
909 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
910 Klass* k = SystemDictionary::resolve_from_stream(class_name,
911 class_loader,
912 protection_domain,
913 &st,
914 CHECK_NULL);
915
916 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
917 trace_class_resolution(k);
918 }
919
920 return (jclass) JNIHandles::make_local(env, k->java_mirror());
921 }
922
923
924 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
925 JVMWrapper("JVM_DefineClass");
926
927 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
928 JVM_END
929
930
931 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
932 JVMWrapper("JVM_DefineClassWithSource");
933
934 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
935 JVM_END
936
937 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
938 JVMWrapper("JVM_FindLoadedClass");
939 ResourceMark rm(THREAD);
940
941 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
942 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
943
944 const char* str = java_lang_String::as_utf8_string(string());
945 // Sanity check, don't expect null
946 if (str == NULL) return NULL;
947
948 const int str_len = (int)strlen(str);
949 if (str_len > Symbol::max_length()) {
950 // It's impossible to create this class; the name cannot fit
951 // into the constant pool.
952 return NULL;
953 }
954 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
955
956 // Security Note:
957 // The Java level wrapper will perform the necessary security check allowing
958 // us to pass the NULL as the initiating class loader.
959 Handle h_loader(THREAD, JNIHandles::resolve(loader));
960 if (UsePerfData) {
961 is_lock_held_by_thread(h_loader,
962 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
963 THREAD);
964 }
965
966 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
967 h_loader,
968 Handle(),
969 CHECK_NULL);
970 #if INCLUDE_CDS
971 if (k == NULL) {
972 // If the class is not already loaded, try to see if it's in the shared
973 // archive for the current classloader (h_loader).
974 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
975 }
976 #endif
977 return (k == NULL) ? NULL :
978 (jclass) JNIHandles::make_local(env, k->java_mirror());
979 JVM_END
980
981 // Module support //////////////////////////////////////////////////////////////////////////////
982
983 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
984 jstring location, const char* const* packages, jsize num_packages))
985 JVMWrapper("JVM_DefineModule");
986 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
987 JVM_END
988
989 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
990 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
991 Modules::set_bootloader_unnamed_module(module, CHECK);
992 JVM_END
993
994 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
995 JVMWrapper("JVM_AddModuleExports");
996 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
997 JVM_END
998
999 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1000 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1001 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1002 JVM_END
1003
1004 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1005 JVMWrapper("JVM_AddModuleExportsToAll");
1006 Modules::add_module_exports(from_module, package, NULL, CHECK);
1007 JVM_END
1008
1009 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1010 JVMWrapper("JVM_AddReadsModule");
1011 Modules::add_reads_module(from_module, source_module, CHECK);
1012 JVM_END
1013
1014 // Reflection support //////////////////////////////////////////////////////////////////////////////
1015
1016 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1017 assert (cls != NULL, "illegal class");
1018 JVMWrapper("JVM_GetClassName");
1019 JvmtiVMObjectAllocEventCollector oam;
1020 ResourceMark rm(THREAD);
1021 const char* name;
1022 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1023 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1024 } else {
1025 // Consider caching interned string in Klass
1026 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1027 assert(k->is_klass(), "just checking");
1028 name = k->external_name();
1029 }
1030 oop result = StringTable::intern((char*) name, CHECK_NULL);
1031 return (jstring) JNIHandles::make_local(env, result);
1032 JVM_END
1033
1034
1035 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1036 JVMWrapper("JVM_GetClassInterfaces");
1037 JvmtiVMObjectAllocEventCollector oam;
1038 oop mirror = JNIHandles::resolve_non_null(cls);
1039
1040 // Special handling for primitive objects
1041 if (java_lang_Class::is_primitive(mirror)) {
1042 // Primitive objects does not have any interfaces
1043 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1044 return (jobjectArray) JNIHandles::make_local(env, r);
1045 }
1046
1047 Klass* klass = java_lang_Class::as_Klass(mirror);
1048 // Figure size of result array
1049 int size;
1050 if (klass->is_instance_klass()) {
1051 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1052 } else {
1053 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1054 size = 2;
1055 }
1056
1057 // Allocate result array
1058 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1059 objArrayHandle result (THREAD, r);
1060 // Fill in result
1061 if (klass->is_instance_klass()) {
1062 // Regular instance klass, fill in all local interfaces
1063 for (int index = 0; index < size; index++) {
1064 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1065 result->obj_at_put(index, k->java_mirror());
1066 }
1067 } else {
1068 // All arrays implement java.lang.Cloneable and java.io.Serializable
1069 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1070 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1071 }
1072 return (jobjectArray) JNIHandles::make_local(env, result());
1073 JVM_END
1074
1075
1076 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1077 JVMWrapper("JVM_IsInterface");
1078 oop mirror = JNIHandles::resolve_non_null(cls);
1079 if (java_lang_Class::is_primitive(mirror)) {
1080 return JNI_FALSE;
1081 }
1082 Klass* k = java_lang_Class::as_Klass(mirror);
1083 jboolean result = k->is_interface();
1084 assert(!result || k->is_instance_klass(),
1085 "all interfaces are instance types");
1086 // The compiler intrinsic for isInterface tests the
1087 // Klass::_access_flags bits in the same way.
1088 return result;
1089 JVM_END
1090
1091
1092 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1093 JVMWrapper("JVM_GetClassSigners");
1094 JvmtiVMObjectAllocEventCollector oam;
1095 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1096 // There are no signers for primitive types
1097 return NULL;
1098 }
1099
1100 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1101
1102 // If there are no signers set in the class, or if the class
1103 // is an array, return NULL.
1104 if (signers == NULL) return NULL;
1105
1106 // copy of the signers array
1107 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1108 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1109 for (int index = 0; index < signers->length(); index++) {
1110 signers_copy->obj_at_put(index, signers->obj_at(index));
1111 }
1112
1113 // return the copy
1114 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1115 JVM_END
1116
1117
1118 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1119 JVMWrapper("JVM_SetClassSigners");
1120 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1121 // This call is ignored for primitive types and arrays.
1122 // Signers are only set once, ClassLoader.java, and thus shouldn't
1123 // be called with an array. Only the bootstrap loader creates arrays.
1124 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1125 if (k->is_instance_klass()) {
1126 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1127 }
1128 }
1129 JVM_END
1130
1131
1132 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1133 JVMWrapper("JVM_GetProtectionDomain");
1134 if (JNIHandles::resolve(cls) == NULL) {
1135 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1136 }
1137
1138 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1139 // Primitive types does not have a protection domain.
1140 return NULL;
1141 }
1142
1143 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1144 return (jobject) JNIHandles::make_local(env, pd);
1145 JVM_END
1146
1147
1148 static bool is_authorized(Handle context, InstanceKlass* klass, TRAPS) {
1149 // If there is a security manager and protection domain, check the access
1150 // in the protection domain, otherwise it is authorized.
1151 if (java_lang_System::has_security_manager()) {
1152
1153 // For bootstrapping, if pd implies method isn't in the JDK, allow
1154 // this context to revert to older behavior.
1155 // In this case the isAuthorized field in AccessControlContext is also not
1156 // present.
1157 if (Universe::protection_domain_implies_method() == NULL) {
1158 return true;
1159 }
1160
1161 // Whitelist certain access control contexts
1162 if (java_security_AccessControlContext::is_authorized(context)) {
1163 return true;
1164 }
1165
1166 oop prot = klass->protection_domain();
1167 if (prot != NULL) {
1168 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1169 // in the new wrapper.
1170 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1171 Handle h_prot(THREAD, prot);
1172 JavaValue result(T_BOOLEAN);
1173 JavaCallArguments args(h_prot);
1174 JavaCalls::call(&result, m, &args, CHECK_false);
1175 return (result.get_jboolean() != 0);
1176 }
1177 }
1178 return true;
1179 }
1180
1181 // Create an AccessControlContext with a protection domain with null codesource
1182 // and null permissions - which gives no permissions.
1183 oop create_dummy_access_control_context(TRAPS) {
1184 InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1185 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1186 // Call constructor ProtectionDomain(null, null);
1187 JavaValue result(T_VOID);
1188 JavaCalls::call_special(&result, obj, pd_klass,
1189 vmSymbols::object_initializer_name(),
1190 vmSymbols::codesource_permissioncollection_signature(),
1191 Handle(), Handle(), CHECK_NULL);
1192
1193 // new ProtectionDomain[] {pd};
1194 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1195 context->obj_at_put(0, obj());
1196
1197 // new AccessControlContext(new ProtectionDomain[] {pd})
1198 objArrayHandle h_context(THREAD, context);
1199 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1200 return acc;
1201 }
1202
1203 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1204 JVMWrapper("JVM_DoPrivileged");
1205
1206 if (action == NULL) {
1207 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1208 }
1209
1210 // Compute the frame initiating the do privileged operation and setup the privileged stack
1211 vframeStream vfst(thread);
1212 vfst.security_get_caller_frame(1);
1213
1214 if (vfst.at_end()) {
1215 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1216 }
1217
1218 Method* method = vfst.method();
1219 InstanceKlass* klass = method->method_holder();
1220
1221 // Check that action object understands "Object run()"
1222 Handle h_context;
1223 if (context != NULL) {
1224 h_context = Handle(THREAD, JNIHandles::resolve(context));
1225 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1226 if (!authorized) {
1227 // Create an unprivileged access control object and call it's run function
1228 // instead.
1229 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1230 h_context = Handle(THREAD, noprivs);
1231 }
1232 }
1233
1234 // Check that action object understands "Object run()"
1235 Handle object (THREAD, JNIHandles::resolve(action));
1236
1237 // get run() method
1238 Method* m_oop = object->klass()->uncached_lookup_method(
1239 vmSymbols::run_method_name(),
1240 vmSymbols::void_object_signature(),
1241 Klass::find_overpass);
1242
1243 // See if there is a default method for "Object run()".
1244 if (m_oop == NULL && object->klass()->is_instance_klass()) {
1245 InstanceKlass* iklass = InstanceKlass::cast(object->klass());
1246 m_oop = iklass->lookup_method_in_ordered_interfaces(
1247 vmSymbols::run_method_name(),
1248 vmSymbols::void_object_signature());
1249 }
1250
1251 methodHandle m (THREAD, m_oop);
1252 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static() || m()->is_abstract()) {
1253 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1254 }
1255
1256 // Stack allocated list of privileged stack elements
1257 PrivilegedElement pi;
1258 if (!vfst.at_end()) {
1259 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1260 thread->set_privileged_stack_top(&pi);
1261 }
1262
1263
1264 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1265 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1266 Handle pending_exception;
1267 JavaValue result(T_OBJECT);
1268 JavaCallArguments args(object);
1269 JavaCalls::call(&result, m, &args, THREAD);
1270
1271 // done with action, remove ourselves from the list
1272 if (!vfst.at_end()) {
1273 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1274 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1275 }
1276
1277 if (HAS_PENDING_EXCEPTION) {
1278 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1279 CLEAR_PENDING_EXCEPTION;
1280 // JVMTI has already reported the pending exception
1281 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1282 if (THREAD->is_Java_thread()) {
1283 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1284 }
1285 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1286 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1287 // Throw a java.security.PrivilegedActionException(Exception e) exception
1288 JavaCallArguments args(pending_exception);
1289 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1290 vmSymbols::exception_void_signature(),
1291 &args);
1292 }
1293 }
1294
1295 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1296 return JNIHandles::make_local(env, (oop) result.get_jobject());
1297 JVM_END
1298
1299
1300 // Returns the inherited_access_control_context field of the running thread.
1301 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1302 JVMWrapper("JVM_GetInheritedAccessControlContext");
1303 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1304 return JNIHandles::make_local(env, result);
1305 JVM_END
1306
1307 class RegisterArrayForGC {
1308 private:
1309 JavaThread *_thread;
1310 public:
1311 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1312 _thread = thread;
1313 _thread->register_array_for_gc(array);
1314 }
1315
1316 ~RegisterArrayForGC() {
1317 _thread->register_array_for_gc(NULL);
1318 }
1319 };
1320
1321
1322 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1323 JVMWrapper("JVM_GetStackAccessControlContext");
1324 if (!UsePrivilegedStack) return NULL;
1325
1326 ResourceMark rm(THREAD);
1327 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1328 JvmtiVMObjectAllocEventCollector oam;
1329
1330 // count the protection domains on the execution stack. We collapse
1331 // duplicate consecutive protection domains into a single one, as
1332 // well as stopping when we hit a privileged frame.
1333
1334 // Use vframeStream to iterate through Java frames
1335 vframeStream vfst(thread);
1336
1337 oop previous_protection_domain = NULL;
1338 Handle privileged_context(thread, NULL);
1339 bool is_privileged = false;
1340 oop protection_domain = NULL;
1341
1342 for(; !vfst.at_end(); vfst.next()) {
1343 // get method of frame
1344 Method* method = vfst.method();
1345 intptr_t* frame_id = vfst.frame_id();
1346
1347 // check the privileged frames to see if we have a match
1348 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1349 // this frame is privileged
1350 is_privileged = true;
1351 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1352 protection_domain = thread->privileged_stack_top()->protection_domain();
1353 } else {
1354 protection_domain = method->method_holder()->protection_domain();
1355 }
1356
1357 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1358 local_array->push(protection_domain);
1359 previous_protection_domain = protection_domain;
1360 }
1361
1362 if (is_privileged) break;
1363 }
1364
1365
1366 // either all the domains on the stack were system domains, or
1367 // we had a privileged system domain
1368 if (local_array->is_empty()) {
1369 if (is_privileged && privileged_context.is_null()) return NULL;
1370
1371 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1372 return JNIHandles::make_local(env, result);
1373 }
1374
1375 // the resource area must be registered in case of a gc
1376 RegisterArrayForGC ragc(thread, local_array);
1377 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1378 local_array->length(), CHECK_NULL);
1379 objArrayHandle h_context(thread, context);
1380 for (int index = 0; index < local_array->length(); index++) {
1381 h_context->obj_at_put(index, local_array->at(index));
1382 }
1383
1384 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1385
1386 return JNIHandles::make_local(env, result);
1387 JVM_END
1388
1389
1390 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1391 JVMWrapper("JVM_IsArrayClass");
1392 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1393 return (k != NULL) && k->is_array_klass() ? true : false;
1394 JVM_END
1395
1396
1397 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1398 JVMWrapper("JVM_IsPrimitiveClass");
1399 oop mirror = JNIHandles::resolve_non_null(cls);
1400 return (jboolean) java_lang_Class::is_primitive(mirror);
1401 JVM_END
1402
1403
1404 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1405 JVMWrapper("JVM_GetClassModifiers");
1406 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1407 // Primitive type
1408 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1409 }
1410
1411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1412 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1413 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1414 return k->modifier_flags();
1415 JVM_END
1416
1417
1418 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1419
1420 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1421 JvmtiVMObjectAllocEventCollector oam;
1422 // ofClass is a reference to a java_lang_Class object. The mirror object
1423 // of an InstanceKlass
1424
1425 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1426 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1427 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1428 return (jobjectArray)JNIHandles::make_local(env, result);
1429 }
1430
1431 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1432 InnerClassesIterator iter(k);
1433
1434 if (iter.length() == 0) {
1435 // Neither an inner nor outer class
1436 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1437 return (jobjectArray)JNIHandles::make_local(env, result);
1438 }
1439
1440 // find inner class info
1441 constantPoolHandle cp(thread, k->constants());
1442 int length = iter.length();
1443
1444 // Allocate temp. result array
1445 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1446 objArrayHandle result (THREAD, r);
1447 int members = 0;
1448
1449 for (; !iter.done(); iter.next()) {
1450 int ioff = iter.inner_class_info_index();
1451 int ooff = iter.outer_class_info_index();
1452
1453 if (ioff != 0 && ooff != 0) {
1454 // Check to see if the name matches the class we're looking for
1455 // before attempting to find the class.
1456 if (cp->klass_name_at_matches(k, ooff)) {
1457 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1458 if (outer_klass == k) {
1459 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1460 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1461
1462 // Throws an exception if outer klass has not declared k as
1463 // an inner klass
1464 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1465
1466 result->obj_at_put(members, inner_klass->java_mirror());
1467 members++;
1468 }
1469 }
1470 }
1471 }
1472
1473 if (members != length) {
1474 // Return array of right length
1475 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1476 for(int i = 0; i < members; i++) {
1477 res->obj_at_put(i, result->obj_at(i));
1478 }
1479 return (jobjectArray)JNIHandles::make_local(env, res);
1480 }
1481
1482 return (jobjectArray)JNIHandles::make_local(env, result());
1483 JVM_END
1484
1485
1486 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1487 {
1488 // ofClass is a reference to a java_lang_Class object.
1489 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1490 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1491 return NULL;
1492 }
1493
1494 bool inner_is_member = false;
1495 Klass* outer_klass
1496 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1497 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1498 if (outer_klass == NULL) return NULL; // already a top-level class
1499 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1500 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1501 }
1502 JVM_END
1503
1504 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1505 {
1506 oop mirror = JNIHandles::resolve_non_null(cls);
1507 if (java_lang_Class::is_primitive(mirror) ||
1508 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1509 return NULL;
1510 }
1511 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1512 int ooff = 0, noff = 0;
1513 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1514 if (noff != 0) {
1515 constantPoolHandle i_cp(thread, k->constants());
1516 Symbol* name = i_cp->symbol_at(noff);
1517 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1518 return (jstring) JNIHandles::make_local(env, str());
1519 }
1520 }
1521 return NULL;
1522 }
1523 JVM_END
1524
1525 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1526 assert (cls != NULL, "illegal class");
1527 JVMWrapper("JVM_GetClassSignature");
1528 JvmtiVMObjectAllocEventCollector oam;
1529 ResourceMark rm(THREAD);
1530 // Return null for arrays and primatives
1531 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1533 if (k->is_instance_klass()) {
1534 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1535 if (sym == NULL) return NULL;
1536 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1537 return (jstring) JNIHandles::make_local(env, str());
1538 }
1539 }
1540 return NULL;
1541 JVM_END
1542
1543
1544 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1545 assert (cls != NULL, "illegal class");
1546 JVMWrapper("JVM_GetClassAnnotations");
1547
1548 // Return null for arrays and primitives
1549 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1551 if (k->is_instance_klass()) {
1552 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1553 return (jbyteArray) JNIHandles::make_local(env, a);
1554 }
1555 }
1556 return NULL;
1557 JVM_END
1558
1559
1560 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1561 // some of this code was adapted from from jni_FromReflectedField
1562
1563 oop reflected = JNIHandles::resolve_non_null(field);
1564 oop mirror = java_lang_reflect_Field::clazz(reflected);
1565 Klass* k = java_lang_Class::as_Klass(mirror);
1566 int slot = java_lang_reflect_Field::slot(reflected);
1567 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1568
1569 InstanceKlass* ik = InstanceKlass::cast(k);
1570 intptr_t offset = ik->field_offset(slot);
1571
1572 if (modifiers & JVM_ACC_STATIC) {
1573 // for static fields we only look in the current class
1574 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1575 assert(false, "cannot find static field");
1576 return false;
1577 }
1578 } else {
1579 // for instance fields we start with the current class and work
1580 // our way up through the superclass chain
1581 if (!ik->find_field_from_offset(offset, false, &fd)) {
1582 assert(false, "cannot find instance field");
1583 return false;
1584 }
1585 }
1586 return true;
1587 }
1588
1589 static Method* jvm_get_method_common(jobject method) {
1590 // some of this code was adapted from from jni_FromReflectedMethod
1591
1592 oop reflected = JNIHandles::resolve_non_null(method);
1593 oop mirror = NULL;
1594 int slot = 0;
1595
1596 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1597 mirror = java_lang_reflect_Constructor::clazz(reflected);
1598 slot = java_lang_reflect_Constructor::slot(reflected);
1599 } else {
1600 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1601 "wrong type");
1602 mirror = java_lang_reflect_Method::clazz(reflected);
1603 slot = java_lang_reflect_Method::slot(reflected);
1604 }
1605 Klass* k = java_lang_Class::as_Klass(mirror);
1606
1607 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1608 assert(m != NULL, "cannot find method");
1609 return m; // caller has to deal with NULL in product mode
1610 }
1611
1612 /* Type use annotations support (JDK 1.8) */
1613
1614 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1615 assert (cls != NULL, "illegal class");
1616 JVMWrapper("JVM_GetClassTypeAnnotations");
1617 ResourceMark rm(THREAD);
1618 // Return null for arrays and primitives
1619 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1620 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1621 if (k->is_instance_klass()) {
1622 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1623 if (type_annotations != NULL) {
1624 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1625 return (jbyteArray) JNIHandles::make_local(env, a);
1626 }
1627 }
1628 }
1629 return NULL;
1630 JVM_END
1631
1632 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1633 assert (method != NULL, "illegal method");
1634 JVMWrapper("JVM_GetMethodTypeAnnotations");
1635
1636 // method is a handle to a java.lang.reflect.Method object
1637 Method* m = jvm_get_method_common(method);
1638 if (m == NULL) {
1639 return NULL;
1640 }
1641
1642 AnnotationArray* type_annotations = m->type_annotations();
1643 if (type_annotations != NULL) {
1644 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1645 return (jbyteArray) JNIHandles::make_local(env, a);
1646 }
1647
1648 return NULL;
1649 JVM_END
1650
1651 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1652 assert (field != NULL, "illegal field");
1653 JVMWrapper("JVM_GetFieldTypeAnnotations");
1654
1655 fieldDescriptor fd;
1656 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1657 if (!gotFd) {
1658 return NULL;
1659 }
1660
1661 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1662 JVM_END
1663
1664 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1665 if (!cp->is_within_bounds(index)) {
1666 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1667 }
1668 }
1669
1670 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1671 {
1672 JVMWrapper("JVM_GetMethodParameters");
1673 // method is a handle to a java.lang.reflect.Method object
1674 Method* method_ptr = jvm_get_method_common(method);
1675 methodHandle mh (THREAD, method_ptr);
1676 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1677 const int num_params = mh->method_parameters_length();
1678
1679 if (num_params < 0) {
1680 // A -1 return value from method_parameters_length means there is no
1681 // parameter data. Return null to indicate this to the reflection
1682 // API.
1683 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1684 return (jobjectArray)NULL;
1685 } else {
1686 // Otherwise, we return something up to reflection, even if it is
1687 // a zero-length array. Why? Because in some cases this can
1688 // trigger a MalformedParametersException.
1689
1690 // make sure all the symbols are properly formatted
1691 for (int i = 0; i < num_params; i++) {
1692 MethodParametersElement* params = mh->method_parameters_start();
1693 int index = params[i].name_cp_index;
1694 bounds_check(mh->constants(), index, CHECK_NULL);
1695
1696 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1697 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1698 "Wrong type at constant pool index");
1699 }
1700
1701 }
1702
1703 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1704 objArrayHandle result (THREAD, result_oop);
1705
1706 for (int i = 0; i < num_params; i++) {
1707 MethodParametersElement* params = mh->method_parameters_start();
1708 // For a 0 index, give a NULL symbol
1709 Symbol* sym = 0 != params[i].name_cp_index ?
1710 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1711 int flags = params[i].flags;
1712 oop param = Reflection::new_parameter(reflected_method, i, sym,
1713 flags, CHECK_NULL);
1714 result->obj_at_put(i, param);
1715 }
1716 return (jobjectArray)JNIHandles::make_local(env, result());
1717 }
1718 }
1719 JVM_END
1720
1721 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1722
1723 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1724 {
1725 JVMWrapper("JVM_GetClassDeclaredFields");
1726 JvmtiVMObjectAllocEventCollector oam;
1727
1728 // Exclude primitive types and array types
1729 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1730 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1731 // Return empty array
1732 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1733 return (jobjectArray) JNIHandles::make_local(env, res);
1734 }
1735
1736 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1737 constantPoolHandle cp(THREAD, k->constants());
1738
1739 // Ensure class is linked
1740 k->link_class(CHECK_NULL);
1741
1742 // Allocate result
1743 int num_fields;
1744
1745 if (publicOnly) {
1746 num_fields = 0;
1747 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1748 if (fs.access_flags().is_public()) ++num_fields;
1749 }
1750 } else {
1751 num_fields = k->java_fields_count();
1752 }
1753
1754 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1755 objArrayHandle result (THREAD, r);
1756
1757 int out_idx = 0;
1758 fieldDescriptor fd;
1759 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1760 if (!publicOnly || fs.access_flags().is_public()) {
1761 fd.reinitialize(k, fs.index());
1762 oop field = Reflection::new_field(&fd, CHECK_NULL);
1763 result->obj_at_put(out_idx, field);
1764 ++out_idx;
1765 }
1766 }
1767 assert(out_idx == num_fields, "just checking");
1768 return (jobjectArray) JNIHandles::make_local(env, result());
1769 }
1770 JVM_END
1771
1772 static bool select_method(const methodHandle& method, bool want_constructor) {
1773 if (want_constructor) {
1774 return (method->is_initializer() && !method->is_static());
1775 } else {
1776 return (!method->is_initializer() && !method->is_overpass());
1777 }
1778 }
1779
1780 static jobjectArray get_class_declared_methods_helper(
1781 JNIEnv *env,
1782 jclass ofClass, jboolean publicOnly,
1783 bool want_constructor,
1784 Klass* klass, TRAPS) {
1785
1786 JvmtiVMObjectAllocEventCollector oam;
1787
1788 // Exclude primitive types and array types
1789 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1790 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1791 // Return empty array
1792 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1793 return (jobjectArray) JNIHandles::make_local(env, res);
1794 }
1795
1796 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1797
1798 // Ensure class is linked
1799 k->link_class(CHECK_NULL);
1800
1801 Array<Method*>* methods = k->methods();
1802 int methods_length = methods->length();
1803
1804 // Save original method_idnum in case of redefinition, which can change
1805 // the idnum of obsolete methods. The new method will have the same idnum
1806 // but if we refresh the methods array, the counts will be wrong.
1807 ResourceMark rm(THREAD);
1808 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1809 int num_methods = 0;
1810
1811 for (int i = 0; i < methods_length; i++) {
1812 methodHandle method(THREAD, methods->at(i));
1813 if (select_method(method, want_constructor)) {
1814 if (!publicOnly || method->is_public()) {
1815 idnums->push(method->method_idnum());
1816 ++num_methods;
1817 }
1818 }
1819 }
1820
1821 // Allocate result
1822 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1823 objArrayHandle result (THREAD, r);
1824
1825 // Now just put the methods that we selected above, but go by their idnum
1826 // in case of redefinition. The methods can be redefined at any safepoint,
1827 // so above when allocating the oop array and below when creating reflect
1828 // objects.
1829 for (int i = 0; i < num_methods; i++) {
1830 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1831 if (method.is_null()) {
1832 // Method may have been deleted and seems this API can handle null
1833 // Otherwise should probably put a method that throws NSME
1834 result->obj_at_put(i, NULL);
1835 } else {
1836 oop m;
1837 if (want_constructor) {
1838 m = Reflection::new_constructor(method, CHECK_NULL);
1839 } else {
1840 m = Reflection::new_method(method, false, CHECK_NULL);
1841 }
1842 result->obj_at_put(i, m);
1843 }
1844 }
1845
1846 return (jobjectArray) JNIHandles::make_local(env, result());
1847 }
1848
1849 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1850 {
1851 JVMWrapper("JVM_GetClassDeclaredMethods");
1852 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1853 /*want_constructor*/ false,
1854 SystemDictionary::reflect_Method_klass(), THREAD);
1855 }
1856 JVM_END
1857
1858 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1859 {
1860 JVMWrapper("JVM_GetClassDeclaredConstructors");
1861 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1862 /*want_constructor*/ true,
1863 SystemDictionary::reflect_Constructor_klass(), THREAD);
1864 }
1865 JVM_END
1866
1867 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1868 {
1869 JVMWrapper("JVM_GetClassAccessFlags");
1870 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1871 // Primitive type
1872 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1873 }
1874
1875 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1876 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1877 }
1878 JVM_END
1879
1880
1881 // Constant pool access //////////////////////////////////////////////////////////
1882
1883 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1884 {
1885 JVMWrapper("JVM_GetClassConstantPool");
1886 JvmtiVMObjectAllocEventCollector oam;
1887
1888 // Return null for primitives and arrays
1889 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1890 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1891 if (k->is_instance_klass()) {
1892 InstanceKlass* k_h = InstanceKlass::cast(k);
1893 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1894 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1895 return JNIHandles::make_local(jcp());
1896 }
1897 }
1898 return NULL;
1899 }
1900 JVM_END
1901
1902
1903 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1904 {
1905 JVMWrapper("JVM_ConstantPoolGetSize");
1906 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1907 return cp->length();
1908 }
1909 JVM_END
1910
1911
1912 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1913 {
1914 JVMWrapper("JVM_ConstantPoolGetClassAt");
1915 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1916 bounds_check(cp, index, CHECK_NULL);
1917 constantTag tag = cp->tag_at(index);
1918 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1919 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1920 }
1921 Klass* k = cp->klass_at(index, CHECK_NULL);
1922 return (jclass) JNIHandles::make_local(k->java_mirror());
1923 }
1924 JVM_END
1925
1926 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1927 {
1928 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1929 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1930 bounds_check(cp, index, CHECK_NULL);
1931 constantTag tag = cp->tag_at(index);
1932 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1933 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1934 }
1935 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1936 if (k == NULL) return NULL;
1937 return (jclass) JNIHandles::make_local(k->java_mirror());
1938 }
1939 JVM_END
1940
1941 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1942 constantTag tag = cp->tag_at(index);
1943 if (!tag.is_method() && !tag.is_interface_method()) {
1944 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1945 }
1946 int klass_ref = cp->uncached_klass_ref_index_at(index);
1947 Klass* k_o;
1948 if (force_resolution) {
1949 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1950 } else {
1951 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1952 if (k_o == NULL) return NULL;
1953 }
1954 InstanceKlass* k = InstanceKlass::cast(k_o);
1955 Symbol* name = cp->uncached_name_ref_at(index);
1956 Symbol* sig = cp->uncached_signature_ref_at(index);
1957 methodHandle m (THREAD, k->find_method(name, sig));
1958 if (m.is_null()) {
1959 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1960 }
1961 oop method;
1962 if (!m->is_initializer() || m->is_static()) {
1963 method = Reflection::new_method(m, true, CHECK_NULL);
1964 } else {
1965 method = Reflection::new_constructor(m, CHECK_NULL);
1966 }
1967 return JNIHandles::make_local(method);
1968 }
1969
1970 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1971 {
1972 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1973 JvmtiVMObjectAllocEventCollector oam;
1974 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1975 bounds_check(cp, index, CHECK_NULL);
1976 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1977 return res;
1978 }
1979 JVM_END
1980
1981 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1982 {
1983 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1984 JvmtiVMObjectAllocEventCollector oam;
1985 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1986 bounds_check(cp, index, CHECK_NULL);
1987 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1988 return res;
1989 }
1990 JVM_END
1991
1992 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1993 constantTag tag = cp->tag_at(index);
1994 if (!tag.is_field()) {
1995 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1996 }
1997 int klass_ref = cp->uncached_klass_ref_index_at(index);
1998 Klass* k_o;
1999 if (force_resolution) {
2000 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2001 } else {
2002 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2003 if (k_o == NULL) return NULL;
2004 }
2005 InstanceKlass* k = InstanceKlass::cast(k_o);
2006 Symbol* name = cp->uncached_name_ref_at(index);
2007 Symbol* sig = cp->uncached_signature_ref_at(index);
2008 fieldDescriptor fd;
2009 Klass* target_klass = k->find_field(name, sig, &fd);
2010 if (target_klass == NULL) {
2011 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2012 }
2013 oop field = Reflection::new_field(&fd, CHECK_NULL);
2014 return JNIHandles::make_local(field);
2015 }
2016
2017 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2018 {
2019 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2020 JvmtiVMObjectAllocEventCollector oam;
2021 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2022 bounds_check(cp, index, CHECK_NULL);
2023 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2024 return res;
2025 }
2026 JVM_END
2027
2028 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2029 {
2030 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2031 JvmtiVMObjectAllocEventCollector oam;
2032 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2033 bounds_check(cp, index, CHECK_NULL);
2034 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2035 return res;
2036 }
2037 JVM_END
2038
2039 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2040 {
2041 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2042 JvmtiVMObjectAllocEventCollector oam;
2043 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2044 bounds_check(cp, index, CHECK_NULL);
2045 constantTag tag = cp->tag_at(index);
2046 if (!tag.is_field_or_method()) {
2047 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2048 }
2049 int klass_ref = cp->uncached_klass_ref_index_at(index);
2050 Symbol* klass_name = cp->klass_name_at(klass_ref);
2051 Symbol* member_name = cp->uncached_name_ref_at(index);
2052 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2053 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2054 objArrayHandle dest(THREAD, dest_o);
2055 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2056 dest->obj_at_put(0, str());
2057 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2058 dest->obj_at_put(1, str());
2059 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2060 dest->obj_at_put(2, str());
2061 return (jobjectArray) JNIHandles::make_local(dest());
2062 }
2063 JVM_END
2064
2065 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2066 {
2067 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2068 JvmtiVMObjectAllocEventCollector oam;
2069 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2070 bounds_check(cp, index, CHECK_0);
2071 constantTag tag = cp->tag_at(index);
2072 if (!tag.is_field_or_method()) {
2073 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2074 }
2075 return (jint) cp->uncached_klass_ref_index_at(index);
2076 }
2077 JVM_END
2078
2079 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2080 {
2081 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2082 JvmtiVMObjectAllocEventCollector oam;
2083 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2084 bounds_check(cp, index, CHECK_0);
2085 constantTag tag = cp->tag_at(index);
2086 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2087 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2088 }
2089 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2090 }
2091 JVM_END
2092
2093 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2094 {
2095 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2096 JvmtiVMObjectAllocEventCollector oam;
2097 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2098 bounds_check(cp, index, CHECK_NULL);
2099 constantTag tag = cp->tag_at(index);
2100 if (!tag.is_name_and_type()) {
2101 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2102 }
2103 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2104 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2105 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2106 objArrayHandle dest(THREAD, dest_o);
2107 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2108 dest->obj_at_put(0, str());
2109 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2110 dest->obj_at_put(1, str());
2111 return (jobjectArray) JNIHandles::make_local(dest());
2112 }
2113 JVM_END
2114
2115 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetIntAt");
2118 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2119 bounds_check(cp, index, CHECK_0);
2120 constantTag tag = cp->tag_at(index);
2121 if (!tag.is_int()) {
2122 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2123 }
2124 return cp->int_at(index);
2125 }
2126 JVM_END
2127
2128 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2129 {
2130 JVMWrapper("JVM_ConstantPoolGetLongAt");
2131 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2132 bounds_check(cp, index, CHECK_(0L));
2133 constantTag tag = cp->tag_at(index);
2134 if (!tag.is_long()) {
2135 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2136 }
2137 return cp->long_at(index);
2138 }
2139 JVM_END
2140
2141 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2142 {
2143 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2144 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2145 bounds_check(cp, index, CHECK_(0.0f));
2146 constantTag tag = cp->tag_at(index);
2147 if (!tag.is_float()) {
2148 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2149 }
2150 return cp->float_at(index);
2151 }
2152 JVM_END
2153
2154 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2155 {
2156 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2157 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2158 bounds_check(cp, index, CHECK_(0.0));
2159 constantTag tag = cp->tag_at(index);
2160 if (!tag.is_double()) {
2161 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2162 }
2163 return cp->double_at(index);
2164 }
2165 JVM_END
2166
2167 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2168 {
2169 JVMWrapper("JVM_ConstantPoolGetStringAt");
2170 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_NULL);
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_string()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 oop str = cp->string_at(index, CHECK_NULL);
2177 return (jstring) JNIHandles::make_local(str);
2178 }
2179 JVM_END
2180
2181 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2182 {
2183 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2184 JvmtiVMObjectAllocEventCollector oam;
2185 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2186 bounds_check(cp, index, CHECK_NULL);
2187 constantTag tag = cp->tag_at(index);
2188 if (!tag.is_symbol()) {
2189 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2190 }
2191 Symbol* sym = cp->symbol_at(index);
2192 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2193 return (jstring) JNIHandles::make_local(str());
2194 }
2195 JVM_END
2196
2197 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2198 {
2199 JVMWrapper("JVM_ConstantPoolGetTagAt");
2200 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2201 bounds_check(cp, index, CHECK_0);
2202 constantTag tag = cp->tag_at(index);
2203 jbyte result = tag.value();
2204 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2205 // they are changed to the corresponding tags from the JVM spec, so that java code in
2206 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2207 if (tag.is_klass_or_reference()) {
2208 result = JVM_CONSTANT_Class;
2209 } else if (tag.is_string_index()) {
2210 result = JVM_CONSTANT_String;
2211 } else if (tag.is_method_type_in_error()) {
2212 result = JVM_CONSTANT_MethodType;
2213 } else if (tag.is_method_handle_in_error()) {
2214 result = JVM_CONSTANT_MethodHandle;
2215 }
2216 return result;
2217 }
2218 JVM_END
2219
2220 // Assertion support. //////////////////////////////////////////////////////////
2221
2222 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2223 JVMWrapper("JVM_DesiredAssertionStatus");
2224 assert(cls != NULL, "bad class");
2225
2226 oop r = JNIHandles::resolve(cls);
2227 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2228 if (java_lang_Class::is_primitive(r)) return false;
2229
2230 Klass* k = java_lang_Class::as_Klass(r);
2231 assert(k->is_instance_klass(), "must be an instance klass");
2232 if (!k->is_instance_klass()) return false;
2233
2234 ResourceMark rm(THREAD);
2235 const char* name = k->name()->as_C_string();
2236 bool system_class = k->class_loader() == NULL;
2237 return JavaAssertions::enabled(name, system_class);
2238
2239 JVM_END
2240
2241
2242 // Return a new AssertionStatusDirectives object with the fields filled in with
2243 // command-line assertion arguments (i.e., -ea, -da).
2244 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2245 JVMWrapper("JVM_AssertionStatusDirectives");
2246 JvmtiVMObjectAllocEventCollector oam;
2247 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2248 return JNIHandles::make_local(env, asd);
2249 JVM_END
2250
2251 // Verification ////////////////////////////////////////////////////////////////////////////////
2252
2253 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2254
2255 // RedefineClasses support: bug 6214132 caused verification to fail.
2256 // All functions from this section should call the jvmtiThreadSate function:
2257 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2258 // The function returns a Klass* of the _scratch_class if the verifier
2259 // was invoked in the middle of the class redefinition.
2260 // Otherwise it returns its argument value which is the _the_class Klass*.
2261 // Please, refer to the description in the jvmtiThreadSate.hpp.
2262
2263 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2264 JVMWrapper("JVM_GetClassNameUTF");
2265 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2266 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2267 return k->name()->as_utf8();
2268 JVM_END
2269
2270
2271 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2272 JVMWrapper("JVM_GetClassCPTypes");
2273 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2274 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2275 // types will have length zero if this is not an InstanceKlass
2276 // (length is determined by call to JVM_GetClassCPEntriesCount)
2277 if (k->is_instance_klass()) {
2278 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2279 for (int index = cp->length() - 1; index >= 0; index--) {
2280 constantTag tag = cp->tag_at(index);
2281 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2282 }
2283 }
2284 JVM_END
2285
2286
2287 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2288 JVMWrapper("JVM_GetClassCPEntriesCount");
2289 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2290 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2291 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2292 JVM_END
2293
2294
2295 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2296 JVMWrapper("JVM_GetClassFieldsCount");
2297 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2298 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2299 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2300 JVM_END
2301
2302
2303 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2304 JVMWrapper("JVM_GetClassMethodsCount");
2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2308 JVM_END
2309
2310
2311 // The following methods, used for the verifier, are never called with
2312 // array klasses, so a direct cast to InstanceKlass is safe.
2313 // Typically, these methods are called in a loop with bounds determined
2314 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2315 // zero for arrays.
2316 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2317 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2318 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2321 int length = method->checked_exceptions_length();
2322 if (length > 0) {
2323 CheckedExceptionElement* table= method->checked_exceptions_start();
2324 for (int i = 0; i < length; i++) {
2325 exceptions[i] = table[i].class_cp_index;
2326 }
2327 }
2328 JVM_END
2329
2330
2331 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2332 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2333 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2334 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2335 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2336 return method->checked_exceptions_length();
2337 JVM_END
2338
2339
2340 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2341 JVMWrapper("JVM_GetMethodIxByteCode");
2342 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2343 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2344 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2345 memcpy(code, method->code_base(), method->code_size());
2346 JVM_END
2347
2348
2349 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2350 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2351 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2352 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2353 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2354 return method->code_size();
2355 JVM_END
2356
2357
2358 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2359 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2363 ExceptionTable extable(method);
2364 entry->start_pc = extable.start_pc(entry_index);
2365 entry->end_pc = extable.end_pc(entry_index);
2366 entry->handler_pc = extable.handler_pc(entry_index);
2367 entry->catchType = extable.catch_type_index(entry_index);
2368 JVM_END
2369
2370
2371 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2372 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2373 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2374 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2375 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2376 return method->exception_table_length();
2377 JVM_END
2378
2379
2380 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2381 JVMWrapper("JVM_GetMethodIxModifiers");
2382 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2383 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2384 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2385 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2386 JVM_END
2387
2388
2389 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2390 JVMWrapper("JVM_GetFieldIxModifiers");
2391 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2392 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2393 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2394 JVM_END
2395
2396
2397 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2398 JVMWrapper("JVM_GetMethodIxLocalsCount");
2399 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2400 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2401 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2402 return method->max_locals();
2403 JVM_END
2404
2405
2406 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2407 JVMWrapper("JVM_GetMethodIxArgsSize");
2408 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2409 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2411 return method->size_of_parameters();
2412 JVM_END
2413
2414
2415 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2416 JVMWrapper("JVM_GetMethodIxMaxStack");
2417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2418 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2420 return method->verifier_max_stack();
2421 JVM_END
2422
2423
2424 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2425 JVMWrapper("JVM_IsConstructorIx");
2426 ResourceMark rm(THREAD);
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2430 return method->name() == vmSymbols::object_initializer_name();
2431 JVM_END
2432
2433
2434 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2435 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2436 ResourceMark rm(THREAD);
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->is_overpass();
2441 JVM_END
2442
2443 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2444 JVMWrapper("JVM_GetMethodIxIxUTF");
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2448 return method->name()->as_utf8();
2449 JVM_END
2450
2451
2452 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2453 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2455 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2456 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2457 return method->signature()->as_utf8();
2458 JVM_END
2459
2460 /**
2461 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2462 * read entries in the constant pool. Since the old verifier always
2463 * works on a copy of the code, it will not see any rewriting that
2464 * may possibly occur in the middle of verification. So it is important
2465 * that nothing it calls tries to use the cpCache instead of the raw
2466 * constant pool, so we must use cp->uncached_x methods when appropriate.
2467 */
2468 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2469 JVMWrapper("JVM_GetCPFieldNameUTF");
2470 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2471 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2472 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2473 switch (cp->tag_at(cp_index).value()) {
2474 case JVM_CONSTANT_Fieldref:
2475 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2476 default:
2477 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2478 }
2479 ShouldNotReachHere();
2480 return NULL;
2481 JVM_END
2482
2483
2484 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2485 JVMWrapper("JVM_GetCPMethodNameUTF");
2486 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2487 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2488 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2489 switch (cp->tag_at(cp_index).value()) {
2490 case JVM_CONSTANT_InterfaceMethodref:
2491 case JVM_CONSTANT_Methodref:
2492 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2493 default:
2494 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2495 }
2496 ShouldNotReachHere();
2497 return NULL;
2498 JVM_END
2499
2500
2501 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2502 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2504 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2505 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2506 switch (cp->tag_at(cp_index).value()) {
2507 case JVM_CONSTANT_InterfaceMethodref:
2508 case JVM_CONSTANT_Methodref:
2509 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2510 default:
2511 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2512 }
2513 ShouldNotReachHere();
2514 return NULL;
2515 JVM_END
2516
2517
2518 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2519 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2520 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2521 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2522 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2523 switch (cp->tag_at(cp_index).value()) {
2524 case JVM_CONSTANT_Fieldref:
2525 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2526 default:
2527 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2528 }
2529 ShouldNotReachHere();
2530 return NULL;
2531 JVM_END
2532
2533
2534 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2535 JVMWrapper("JVM_GetCPClassNameUTF");
2536 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2537 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2538 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2539 Symbol* classname = cp->klass_name_at(cp_index);
2540 return classname->as_utf8();
2541 JVM_END
2542
2543
2544 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2545 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2548 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2549 switch (cp->tag_at(cp_index).value()) {
2550 case JVM_CONSTANT_Fieldref: {
2551 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2552 Symbol* classname = cp->klass_name_at(class_index);
2553 return classname->as_utf8();
2554 }
2555 default:
2556 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2557 }
2558 ShouldNotReachHere();
2559 return NULL;
2560 JVM_END
2561
2562
2563 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2564 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2565 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2566 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2567 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2568 switch (cp->tag_at(cp_index).value()) {
2569 case JVM_CONSTANT_Methodref:
2570 case JVM_CONSTANT_InterfaceMethodref: {
2571 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2572 Symbol* classname = cp->klass_name_at(class_index);
2573 return classname->as_utf8();
2574 }
2575 default:
2576 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2577 }
2578 ShouldNotReachHere();
2579 return NULL;
2580 JVM_END
2581
2582
2583 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2584 JVMWrapper("JVM_GetCPFieldModifiers");
2585 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2586 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2587 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2588 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2589 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2590 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2591 switch (cp->tag_at(cp_index).value()) {
2592 case JVM_CONSTANT_Fieldref: {
2593 Symbol* name = cp->uncached_name_ref_at(cp_index);
2594 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2595 InstanceKlass* ik = InstanceKlass::cast(k_called);
2596 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2597 if (fs.name() == name && fs.signature() == signature) {
2598 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2599 }
2600 }
2601 return -1;
2602 }
2603 default:
2604 fatal("JVM_GetCPFieldModifiers: illegal constant");
2605 }
2606 ShouldNotReachHere();
2607 return 0;
2608 JVM_END
2609
2610
2611 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2612 JVMWrapper("JVM_GetCPMethodModifiers");
2613 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2614 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2615 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2616 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2617 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2618 switch (cp->tag_at(cp_index).value()) {
2619 case JVM_CONSTANT_Methodref:
2620 case JVM_CONSTANT_InterfaceMethodref: {
2621 Symbol* name = cp->uncached_name_ref_at(cp_index);
2622 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2623 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2624 int methods_count = methods->length();
2625 for (int i = 0; i < methods_count; i++) {
2626 Method* method = methods->at(i);
2627 if (method->name() == name && method->signature() == signature) {
2628 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2629 }
2630 }
2631 return -1;
2632 }
2633 default:
2634 fatal("JVM_GetCPMethodModifiers: illegal constant");
2635 }
2636 ShouldNotReachHere();
2637 return 0;
2638 JVM_END
2639
2640
2641 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2642
2643 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2644 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2645 JVM_END
2646
2647
2648 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2649 JVMWrapper("JVM_IsSameClassPackage");
2650 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2651 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2652 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2653 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2654 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2655 JVM_END
2656
2657 // Printing support //////////////////////////////////////////////////
2658 extern "C" {
2659
2660 ATTRIBUTE_PRINTF(3, 0)
2661 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2662 // see bug 4399518, 4417214
2663 if ((intptr_t)count <= 0) return -1;
2664
2665 int result = vsnprintf(str, count, fmt, args);
2666 // Note: on truncation vsnprintf(3) on Unix returns numbers of
2667 // characters which would have been written had the buffer been large
2668 // enough; on Windows, it returns -1. We handle both cases here and
2669 // always return -1, and perform null termination.
2670 if ((result > 0 && (size_t)result >= count) || result == -1) {
2671 str[count - 1] = '\0';
2672 result = -1;
2673 }
2674
2675 return result;
2676 }
2677
2678 ATTRIBUTE_PRINTF(3, 0)
2679 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2680 va_list args;
2681 int len;
2682 va_start(args, fmt);
2683 len = jio_vsnprintf(str, count, fmt, args);
2684 va_end(args);
2685 return len;
2686 }
2687
2688 ATTRIBUTE_PRINTF(2,3)
2689 int jio_fprintf(FILE* f, const char *fmt, ...) {
2690 int len;
2691 va_list args;
2692 va_start(args, fmt);
2693 len = jio_vfprintf(f, fmt, args);
2694 va_end(args);
2695 return len;
2696 }
2697
2698 ATTRIBUTE_PRINTF(2, 0)
2699 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2700 if (Arguments::vfprintf_hook() != NULL) {
2701 return Arguments::vfprintf_hook()(f, fmt, args);
2702 } else {
2703 return vfprintf(f, fmt, args);
2704 }
2705 }
2706
2707 ATTRIBUTE_PRINTF(1, 2)
2708 JNIEXPORT int jio_printf(const char *fmt, ...) {
2709 int len;
2710 va_list args;
2711 va_start(args, fmt);
2712 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2713 va_end(args);
2714 return len;
2715 }
2716
2717
2718 // HotSpot specific jio method
2719 void jio_print(const char* s) {
2720 // Try to make this function as atomic as possible.
2721 if (Arguments::vfprintf_hook() != NULL) {
2722 jio_fprintf(defaultStream::output_stream(), "%s", s);
2723 } else {
2724 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2725 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2726 }
2727 }
2728
2729 } // Extern C
2730
2731 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2732
2733 // In most of the JVM thread support functions we need to access the
2734 // thread through a ThreadsListHandle to prevent it from exiting and
2735 // being reclaimed while we try to operate on it. The exceptions to this
2736 // rule are when operating on the current thread, or if the monitor of
2737 // the target java.lang.Thread is locked at the Java level - in both
2738 // cases the target cannot exit.
2739
2740 static void thread_entry(JavaThread* thread, TRAPS) {
2741 HandleMark hm(THREAD);
2742 Handle obj(THREAD, thread->threadObj());
2743 JavaValue result(T_VOID);
2744 JavaCalls::call_virtual(&result,
2745 obj,
2746 SystemDictionary::Thread_klass(),
2747 vmSymbols::run_method_name(),
2748 vmSymbols::void_method_signature(),
2749 THREAD);
2750 }
2751
2752
2753 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2754 JVMWrapper("JVM_StartThread");
2755 JavaThread *native_thread = NULL;
2756
2757 // We cannot hold the Threads_lock when we throw an exception,
2758 // due to rank ordering issues. Example: we might need to grab the
2759 // Heap_lock while we construct the exception.
2760 bool throw_illegal_thread_state = false;
2761
2762 // We must release the Threads_lock before we can post a jvmti event
2763 // in Thread::start.
2764 {
2765 // Ensure that the C++ Thread and OSThread structures aren't freed before
2766 // we operate.
2767 MutexLocker mu(Threads_lock);
2768
2769 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2770 // re-starting an already started thread, so we should usually find
2771 // that the JavaThread is null. However for a JNI attached thread
2772 // there is a small window between the Thread object being created
2773 // (with its JavaThread set) and the update to its threadStatus, so we
2774 // have to check for this
2775 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2776 throw_illegal_thread_state = true;
2777 } else {
2778 // We could also check the stillborn flag to see if this thread was already stopped, but
2779 // for historical reasons we let the thread detect that itself when it starts running
2780
2781 jlong size =
2782 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2783 // Allocate the C++ Thread structure and create the native thread. The
2784 // stack size retrieved from java is 64-bit signed, but the constructor takes
2785 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2786 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2787 // - Avoid passing negative values which would result in really large stacks.
2788 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2789 size_t sz = size > 0 ? (size_t) size : 0;
2790 native_thread = new JavaThread(&thread_entry, sz);
2791
2792 // At this point it may be possible that no osthread was created for the
2793 // JavaThread due to lack of memory. Check for this situation and throw
2794 // an exception if necessary. Eventually we may want to change this so
2795 // that we only grab the lock if the thread was created successfully -
2796 // then we can also do this check and throw the exception in the
2797 // JavaThread constructor.
2798 if (native_thread->osthread() != NULL) {
2799 // Note: the current thread is not being used within "prepare".
2800 native_thread->prepare(jthread);
2801 }
2802 }
2803 }
2804
2805 if (throw_illegal_thread_state) {
2806 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2807 }
2808
2809 assert(native_thread != NULL, "Starting null thread?");
2810
2811 if (native_thread->osthread() == NULL) {
2812 // No one should hold a reference to the 'native_thread'.
2813 native_thread->smr_delete();
2814 if (JvmtiExport::should_post_resource_exhausted()) {
2815 JvmtiExport::post_resource_exhausted(
2816 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2817 os::native_thread_creation_failed_msg());
2818 }
2819 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2820 os::native_thread_creation_failed_msg());
2821 }
2822
2823 Thread::start(native_thread);
2824
2825 JVM_END
2826
2827
2828 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2829 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2830 // but is thought to be reliable and simple. In the case, where the receiver is the
2831 // same thread as the sender, no VM_Operation is needed.
2832 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2833 JVMWrapper("JVM_StopThread");
2834
2835 // A nested ThreadsListHandle will grab the Threads_lock so create
2836 // tlh before we resolve throwable.
2837 ThreadsListHandle tlh(thread);
2838 oop java_throwable = JNIHandles::resolve(throwable);
2839 if (java_throwable == NULL) {
2840 THROW(vmSymbols::java_lang_NullPointerException());
2841 }
2842 oop java_thread = NULL;
2843 JavaThread* receiver = NULL;
2844 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2845 Events::log_exception(thread,
2846 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2847 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2848
2849 if (is_alive) {
2850 // jthread refers to a live JavaThread.
2851 if (thread == receiver) {
2852 // Exception is getting thrown at self so no VM_Operation needed.
2853 THROW_OOP(java_throwable);
2854 } else {
2855 // Use a VM_Operation to throw the exception.
2856 Thread::send_async_exception(java_thread, java_throwable);
2857 }
2858 } else {
2859 // Either:
2860 // - target thread has not been started before being stopped, or
2861 // - target thread already terminated
2862 // We could read the threadStatus to determine which case it is
2863 // but that is overkill as it doesn't matter. We must set the
2864 // stillborn flag for the first case, and if the thread has already
2865 // exited setting this flag has no effect.
2866 java_lang_Thread::set_stillborn(java_thread);
2867 }
2868 JVM_END
2869
2870
2871 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2872 JVMWrapper("JVM_IsThreadAlive");
2873
2874 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2875 return java_lang_Thread::is_alive(thread_oop);
2876 JVM_END
2877
2878
2879 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2880 JVMWrapper("JVM_SuspendThread");
2881
2882 ThreadsListHandle tlh(thread);
2883 JavaThread* receiver = NULL;
2884 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2885 if (is_alive) {
2886 // jthread refers to a live JavaThread.
2887 {
2888 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2889 if (receiver->is_external_suspend()) {
2890 // Don't allow nested external suspend requests. We can't return
2891 // an error from this interface so just ignore the problem.
2892 return;
2893 }
2894 if (receiver->is_exiting()) { // thread is in the process of exiting
2895 return;
2896 }
2897 receiver->set_external_suspend();
2898 }
2899
2900 // java_suspend() will catch threads in the process of exiting
2901 // and will ignore them.
2902 receiver->java_suspend();
2903
2904 // It would be nice to have the following assertion in all the
2905 // time, but it is possible for a racing resume request to have
2906 // resumed this thread right after we suspended it. Temporarily
2907 // enable this assertion if you are chasing a different kind of
2908 // bug.
2909 //
2910 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2911 // receiver->is_being_ext_suspended(), "thread is not suspended");
2912 }
2913 JVM_END
2914
2915
2916 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2917 JVMWrapper("JVM_ResumeThread");
2918
2919 ThreadsListHandle tlh(thread);
2920 JavaThread* receiver = NULL;
2921 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2922 if (is_alive) {
2923 // jthread refers to a live JavaThread.
2924
2925 // This is the original comment for this Threads_lock grab:
2926 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2927 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2928 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2929 // looks at it.
2930 //
2931 // The above comment dates back to when we had both internal and
2932 // external suspend APIs that shared a common underlying mechanism.
2933 // External suspend is now entirely cooperative and doesn't share
2934 // anything with internal suspend. That said, there are some
2935 // assumptions in the VM that an external resume grabs the
2936 // Threads_lock. We can't drop the Threads_lock grab here until we
2937 // resolve the assumptions that exist elsewhere.
2938 //
2939 MutexLocker ml(Threads_lock);
2940 receiver->java_resume();
2941 }
2942 JVM_END
2943
2944
2945 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2946 JVMWrapper("JVM_SetThreadPriority");
2947
2948 ThreadsListHandle tlh(thread);
2949 oop java_thread = NULL;
2950 JavaThread* receiver = NULL;
2951 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2952 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2953
2954 if (is_alive) {
2955 // jthread refers to a live JavaThread.
2956 Thread::set_priority(receiver, (ThreadPriority)prio);
2957 }
2958 // Implied else: If the JavaThread hasn't started yet, then the
2959 // priority set in the java.lang.Thread object above will be pushed
2960 // down when it does start.
2961 JVM_END
2962
2963
2964 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2965 JVMWrapper("JVM_Yield");
2966 if (os::dont_yield()) return;
2967 HOTSPOT_THREAD_YIELD();
2968 os::naked_yield();
2969 JVM_END
2970
2971
2972 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2973 JVMWrapper("JVM_Sleep");
2974
2975 if (millis < 0) {
2976 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2977 }
2978
2979 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2980 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2981 }
2982
2983 // Save current thread state and restore it at the end of this block.
2984 // And set new thread state to SLEEPING.
2985 JavaThreadSleepState jtss(thread);
2986
2987 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2988
2989 EventThreadSleep event;
2990
2991 if (millis == 0) {
2992 os::naked_yield();
2993 } else {
2994 ThreadState old_state = thread->osthread()->get_state();
2995 thread->osthread()->set_state(SLEEPING);
2996 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2997 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2998 // us while we were sleeping. We do not overwrite those.
2999 if (!HAS_PENDING_EXCEPTION) {
3000 if (event.should_commit()) {
3001 event.set_time(millis);
3002 event.commit();
3003 }
3004 HOTSPOT_THREAD_SLEEP_END(1);
3005
3006 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3007 // to properly restore the thread state. That's likely wrong.
3008 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3009 }
3010 }
3011 thread->osthread()->set_state(old_state);
3012 }
3013 if (event.should_commit()) {
3014 event.set_time(millis);
3015 event.commit();
3016 }
3017 HOTSPOT_THREAD_SLEEP_END(0);
3018 JVM_END
3019
3020 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3021 JVMWrapper("JVM_CurrentThread");
3022 oop jthread = thread->threadObj();
3023 assert (thread != NULL, "no current thread!");
3024 return JNIHandles::make_local(env, jthread);
3025 JVM_END
3026
3027
3028 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3029 JVMWrapper("JVM_CountStackFrames");
3030
3031 uint32_t debug_bits = 0;
3032 ThreadsListHandle tlh(thread);
3033 JavaThread* receiver = NULL;
3034 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3035 int count = 0;
3036 if (is_alive) {
3037 // jthread refers to a live JavaThread.
3038 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3039 // Count all java activation, i.e., number of vframes.
3040 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3041 // Native frames are not counted.
3042 if (!vfst.method()->is_native()) count++;
3043 }
3044 } else {
3045 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3046 "this thread is not suspended");
3047 }
3048 }
3049 // Implied else: if JavaThread is not alive simply return a count of 0.
3050
3051 return count;
3052 JVM_END
3053
3054
3055 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3056 JVMWrapper("JVM_Interrupt");
3057
3058 ThreadsListHandle tlh(thread);
3059 JavaThread* receiver = NULL;
3060 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3061 if (is_alive) {
3062 // jthread refers to a live JavaThread.
3063 Thread::interrupt(receiver);
3064 }
3065 JVM_END
3066
3067
3068 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3069 JVMWrapper("JVM_IsInterrupted");
3070
3071 ThreadsListHandle tlh(thread);
3072 JavaThread* receiver = NULL;
3073 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3074 if (is_alive) {
3075 // jthread refers to a live JavaThread.
3076 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3077 } else {
3078 return JNI_FALSE;
3079 }
3080 JVM_END
3081
3082
3083 // Return true iff the current thread has locked the object passed in
3084
3085 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3086 JVMWrapper("JVM_HoldsLock");
3087 assert(THREAD->is_Java_thread(), "sanity check");
3088 if (obj == NULL) {
3089 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3090 }
3091 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3092 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3093 JVM_END
3094
3095
3096 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3097 JVMWrapper("JVM_DumpAllStacks");
3098 VM_PrintThreads op;
3099 VMThread::execute(&op);
3100 if (JvmtiExport::should_post_data_dump()) {
3101 JvmtiExport::post_data_dump();
3102 }
3103 JVM_END
3104
3105 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3106 JVMWrapper("JVM_SetNativeThreadName");
3107
3108 // We don't use a ThreadsListHandle here because the current thread
3109 // must be alive.
3110 oop java_thread = JNIHandles::resolve_non_null(jthread);
3111 JavaThread* thr = java_lang_Thread::thread(java_thread);
3112 if (thread == thr && !thr->has_attached_via_jni()) {
3113 // Thread naming is only supported for the current thread and
3114 // we don't set the name of an attached thread to avoid stepping
3115 // on other programs.
3116 ResourceMark rm(thread);
3117 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3118 os::set_native_thread_name(thread_name);
3119 }
3120 JVM_END
3121
3122 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3123
3124 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3125 JVMWrapper("JVM_GetClassContext");
3126 ResourceMark rm(THREAD);
3127 JvmtiVMObjectAllocEventCollector oam;
3128 vframeStream vfst(thread);
3129
3130 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3131 // This must only be called from SecurityManager.getClassContext
3132 Method* m = vfst.method();
3133 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3134 m->name() == vmSymbols::getClassContext_name() &&
3135 m->signature() == vmSymbols::void_class_array_signature())) {
3136 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3137 }
3138 }
3139
3140 // Collect method holders
3141 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3142 for (; !vfst.at_end(); vfst.security_next()) {
3143 Method* m = vfst.method();
3144 // Native frames are not returned
3145 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3146 Klass* holder = m->method_holder();
3147 assert(holder->is_klass(), "just checking");
3148 klass_array->append(holder);
3149 }
3150 }
3151
3152 // Create result array of type [Ljava/lang/Class;
3153 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3154 // Fill in mirrors corresponding to method holders
3155 for (int i = 0; i < klass_array->length(); i++) {
3156 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3157 }
3158
3159 return (jobjectArray) JNIHandles::make_local(env, result);
3160 JVM_END
3161
3162
3163 // java.lang.Package ////////////////////////////////////////////////////////////////
3164
3165
3166 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3167 JVMWrapper("JVM_GetSystemPackage");
3168 ResourceMark rm(THREAD);
3169 JvmtiVMObjectAllocEventCollector oam;
3170 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3171 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3172 return (jstring) JNIHandles::make_local(result);
3173 JVM_END
3174
3175
3176 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3177 JVMWrapper("JVM_GetSystemPackages");
3178 JvmtiVMObjectAllocEventCollector oam;
3179 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3180 return (jobjectArray) JNIHandles::make_local(result);
3181 JVM_END
3182
3183
3184 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3185
3186
3187 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3188 JVMWrapper("JVM_GetAndClearReferencePendingList");
3189
3190 MonitorLockerEx ml(Heap_lock);
3191 oop ref = Universe::reference_pending_list();
3192 if (ref != NULL) {
3193 Universe::set_reference_pending_list(NULL);
3194 }
3195 return JNIHandles::make_local(env, ref);
3196 JVM_END
3197
3198 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3199 JVMWrapper("JVM_HasReferencePendingList");
3200 MonitorLockerEx ml(Heap_lock);
3201 return Universe::has_reference_pending_list();
3202 JVM_END
3203
3204 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3205 JVMWrapper("JVM_WaitForReferencePendingList");
3206 MonitorLockerEx ml(Heap_lock);
3207 while (!Universe::has_reference_pending_list()) {
3208 ml.wait();
3209 }
3210 JVM_END
3211
3212
3213 // ObjectInputStream ///////////////////////////////////////////////////////////////
3214
3215 // Return the first user-defined class loader up the execution stack, or null
3216 // if only code from the bootstrap or platform class loader is on the stack.
3217
3218 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3219 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3220 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3221 oop loader = vfst.method()->method_holder()->class_loader();
3222 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3223 return JNIHandles::make_local(env, loader);
3224 }
3225 }
3226 return NULL;
3227 JVM_END
3228
3229
3230 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3231
3232
3233 // resolve array handle and check arguments
3234 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3235 if (arr == NULL) {
3236 THROW_0(vmSymbols::java_lang_NullPointerException());
3237 }
3238 oop a = JNIHandles::resolve_non_null(arr);
3239 if (!a->is_array()) {
3240 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3241 } else if (type_array_only && !a->is_typeArray()) {
3242 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3243 }
3244 return arrayOop(a);
3245 }
3246
3247
3248 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3249 JVMWrapper("JVM_GetArrayLength");
3250 arrayOop a = check_array(env, arr, false, CHECK_0);
3251 return a->length();
3252 JVM_END
3253
3254
3255 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3256 JVMWrapper("JVM_Array_Get");
3257 JvmtiVMObjectAllocEventCollector oam;
3258 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3259 jvalue value;
3260 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3261 oop box = Reflection::box(&value, type, CHECK_NULL);
3262 return JNIHandles::make_local(env, box);
3263 JVM_END
3264
3265
3266 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3267 JVMWrapper("JVM_GetPrimitiveArrayElement");
3268 jvalue value;
3269 value.i = 0; // to initialize value before getting used in CHECK
3270 arrayOop a = check_array(env, arr, true, CHECK_(value));
3271 assert(a->is_typeArray(), "just checking");
3272 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3273 BasicType wide_type = (BasicType) wCode;
3274 if (type != wide_type) {
3275 Reflection::widen(&value, type, wide_type, CHECK_(value));
3276 }
3277 return value;
3278 JVM_END
3279
3280
3281 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3282 JVMWrapper("JVM_SetArrayElement");
3283 arrayOop a = check_array(env, arr, false, CHECK);
3284 oop box = JNIHandles::resolve(val);
3285 jvalue value;
3286 value.i = 0; // to initialize value before getting used in CHECK
3287 BasicType value_type;
3288 if (a->is_objArray()) {
3289 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3290 value_type = Reflection::unbox_for_regular_object(box, &value);
3291 } else {
3292 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3293 }
3294 Reflection::array_set(&value, a, index, value_type, CHECK);
3295 JVM_END
3296
3297
3298 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3299 JVMWrapper("JVM_SetPrimitiveArrayElement");
3300 arrayOop a = check_array(env, arr, true, CHECK);
3301 assert(a->is_typeArray(), "just checking");
3302 BasicType value_type = (BasicType) vCode;
3303 Reflection::array_set(&v, a, index, value_type, CHECK);
3304 JVM_END
3305
3306
3307 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3308 JVMWrapper("JVM_NewArray");
3309 JvmtiVMObjectAllocEventCollector oam;
3310 oop element_mirror = JNIHandles::resolve(eltClass);
3311 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3312 return JNIHandles::make_local(env, result);
3313 JVM_END
3314
3315
3316 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3317 JVMWrapper("JVM_NewMultiArray");
3318 JvmtiVMObjectAllocEventCollector oam;
3319 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3320 oop element_mirror = JNIHandles::resolve(eltClass);
3321 assert(dim_array->is_typeArray(), "just checking");
3322 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3323 return JNIHandles::make_local(env, result);
3324 JVM_END
3325
3326
3327 // Library support ///////////////////////////////////////////////////////////////////////////
3328
3329 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3330 //%note jvm_ct
3331 JVMWrapper("JVM_LoadLibrary");
3332 char ebuf[1024];
3333 void *load_result;
3334 {
3335 ThreadToNativeFromVM ttnfvm(thread);
3336 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3337 }
3338 if (load_result == NULL) {
3339 char msg[1024];
3340 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3341 // Since 'ebuf' may contain a string encoded using
3342 // platform encoding scheme, we need to pass
3343 // Exceptions::unsafe_to_utf8 to the new_exception method
3344 // as the last argument. See bug 6367357.
3345 Handle h_exception =
3346 Exceptions::new_exception(thread,
3347 vmSymbols::java_lang_UnsatisfiedLinkError(),
3348 msg, Exceptions::unsafe_to_utf8);
3349
3350 THROW_HANDLE_0(h_exception);
3351 }
3352 return load_result;
3353 JVM_END
3354
3355
3356 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3357 JVMWrapper("JVM_UnloadLibrary");
3358 os::dll_unload(handle);
3359 JVM_END
3360
3361
3362 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3363 JVMWrapper("JVM_FindLibraryEntry");
3364 return os::dll_lookup(handle, name);
3365 JVM_END
3366
3367
3368 // JNI version ///////////////////////////////////////////////////////////////////////////////
3369
3370 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3371 JVMWrapper("JVM_IsSupportedJNIVersion");
3372 return Threads::is_supported_jni_version_including_1_1(version);
3373 JVM_END
3374
3375
3376 // String support ///////////////////////////////////////////////////////////////////////////
3377
3378 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3379 JVMWrapper("JVM_InternString");
3380 JvmtiVMObjectAllocEventCollector oam;
3381 if (str == NULL) return NULL;
3382 oop string = JNIHandles::resolve_non_null(str);
3383 oop result = StringTable::intern(string, CHECK_NULL);
3384 return (jstring) JNIHandles::make_local(env, result);
3385 JVM_END
3386
3387
3388 // Raw monitor support //////////////////////////////////////////////////////////////////////
3389
3390 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3391 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3392 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3393 // that only works with java threads.
3394
3395
3396 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3397 VM_Exit::block_if_vm_exited();
3398 JVMWrapper("JVM_RawMonitorCreate");
3399 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3400 }
3401
3402
3403 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3404 VM_Exit::block_if_vm_exited();
3405 JVMWrapper("JVM_RawMonitorDestroy");
3406 delete ((Mutex*) mon);
3407 }
3408
3409
3410 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3411 VM_Exit::block_if_vm_exited();
3412 JVMWrapper("JVM_RawMonitorEnter");
3413 ((Mutex*) mon)->jvm_raw_lock();
3414 return 0;
3415 }
3416
3417
3418 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3419 VM_Exit::block_if_vm_exited();
3420 JVMWrapper("JVM_RawMonitorExit");
3421 ((Mutex*) mon)->jvm_raw_unlock();
3422 }
3423
3424
3425 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3426
3427 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3428 Handle loader, Handle protection_domain,
3429 jboolean throwError, TRAPS) {
3430 // Security Note:
3431 // The Java level wrapper will perform the necessary security check allowing
3432 // us to pass the NULL as the initiating class loader. The VM is responsible for
3433 // the checkPackageAccess relative to the initiating class loader via the
3434 // protection_domain. The protection_domain is passed as NULL by the java code
3435 // if there is no security manager in 3-arg Class.forName().
3436 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3437
3438 // Check if we should initialize the class
3439 if (init && klass->is_instance_klass()) {
3440 klass->initialize(CHECK_NULL);
3441 }
3442 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3443 }
3444
3445
3446 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3447
3448 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3449 JVMWrapper("JVM_InvokeMethod");
3450 Handle method_handle;
3451 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3452 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3453 Handle receiver(THREAD, JNIHandles::resolve(obj));
3454 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3455 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3456 jobject res = JNIHandles::make_local(env, result);
3457 if (JvmtiExport::should_post_vm_object_alloc()) {
3458 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3459 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3460 if (java_lang_Class::is_primitive(ret_type)) {
3461 // Only for primitive type vm allocates memory for java object.
3462 // See box() method.
3463 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3464 }
3465 }
3466 return res;
3467 } else {
3468 THROW_0(vmSymbols::java_lang_StackOverflowError());
3469 }
3470 JVM_END
3471
3472
3473 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3474 JVMWrapper("JVM_NewInstanceFromConstructor");
3475 oop constructor_mirror = JNIHandles::resolve(c);
3476 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3477 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3478 jobject res = JNIHandles::make_local(env, result);
3479 if (JvmtiExport::should_post_vm_object_alloc()) {
3480 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3481 }
3482 return res;
3483 JVM_END
3484
3485 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3486
3487 JVM_LEAF(jboolean, JVM_SupportsCX8())
3488 JVMWrapper("JVM_SupportsCX8");
3489 return VM_Version::supports_cx8();
3490 JVM_END
3491
3492 // Returns an array of all live Thread objects (VM internal JavaThreads,
3493 // jvmti agent threads, and JNI attaching threads are skipped)
3494 // See CR 6404306 regarding JNI attaching threads
3495 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3496 ResourceMark rm(THREAD);
3497 ThreadsListEnumerator tle(THREAD, false, false);
3498 JvmtiVMObjectAllocEventCollector oam;
3499
3500 int num_threads = tle.num_threads();
3501 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3502 objArrayHandle threads_ah(THREAD, r);
3503
3504 for (int i = 0; i < num_threads; i++) {
3505 Handle h = tle.get_threadObj(i);
3506 threads_ah->obj_at_put(i, h());
3507 }
3508
3509 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3510 JVM_END
3511
3512
3513 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3514 // Return StackTraceElement[][], each element is the stack trace of a thread in
3515 // the corresponding entry in the given threads array
3516 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3517 JVMWrapper("JVM_DumpThreads");
3518 JvmtiVMObjectAllocEventCollector oam;
3519
3520 // Check if threads is null
3521 if (threads == NULL) {
3522 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3523 }
3524
3525 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3526 objArrayHandle ah(THREAD, a);
3527 int num_threads = ah->length();
3528 // check if threads is non-empty array
3529 if (num_threads == 0) {
3530 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3531 }
3532
3533 // check if threads is not an array of objects of Thread class
3534 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3535 if (k != SystemDictionary::Thread_klass()) {
3536 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3537 }
3538
3539 ResourceMark rm(THREAD);
3540
3541 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3542 for (int i = 0; i < num_threads; i++) {
3543 oop thread_obj = ah->obj_at(i);
3544 instanceHandle h(THREAD, (instanceOop) thread_obj);
3545 thread_handle_array->append(h);
3546 }
3547
3548 // The JavaThread references in thread_handle_array are validated
3549 // in VM_ThreadDump::doit().
3550 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3551 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3552
3553 JVM_END
3554
3555 // JVM monitoring and management support
3556 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3557 return Management::get_jmm_interface(version);
3558 JVM_END
3559
3560 // com.sun.tools.attach.VirtualMachine agent properties support
3561 //
3562 // Initialize the agent properties with the properties maintained in the VM
3563 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3564 JVMWrapper("JVM_InitAgentProperties");
3565 ResourceMark rm;
3566
3567 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3568
3569 PUTPROP(props, "sun.java.command", Arguments::java_command());
3570 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3571 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3572 return properties;
3573 JVM_END
3574
3575 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3576 {
3577 JVMWrapper("JVM_GetEnclosingMethodInfo");
3578 JvmtiVMObjectAllocEventCollector oam;
3579
3580 if (ofClass == NULL) {
3581 return NULL;
3582 }
3583 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3584 // Special handling for primitive objects
3585 if (java_lang_Class::is_primitive(mirror())) {
3586 return NULL;
3587 }
3588 Klass* k = java_lang_Class::as_Klass(mirror());
3589 if (!k->is_instance_klass()) {
3590 return NULL;
3591 }
3592 InstanceKlass* ik = InstanceKlass::cast(k);
3593 int encl_method_class_idx = ik->enclosing_method_class_index();
3594 if (encl_method_class_idx == 0) {
3595 return NULL;
3596 }
3597 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3598 objArrayHandle dest(THREAD, dest_o);
3599 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3600 dest->obj_at_put(0, enc_k->java_mirror());
3601 int encl_method_method_idx = ik->enclosing_method_method_index();
3602 if (encl_method_method_idx != 0) {
3603 Symbol* sym = ik->constants()->symbol_at(
3604 extract_low_short_from_int(
3605 ik->constants()->name_and_type_at(encl_method_method_idx)));
3606 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3607 dest->obj_at_put(1, str());
3608 sym = ik->constants()->symbol_at(
3609 extract_high_short_from_int(
3610 ik->constants()->name_and_type_at(encl_method_method_idx)));
3611 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3612 dest->obj_at_put(2, str());
3613 }
3614 return (jobjectArray) JNIHandles::make_local(dest());
3615 }
3616 JVM_END
3617
3618 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3619 {
3620 memset(info, 0, info_size);
3621
3622 info->jvm_version = Abstract_VM_Version::jvm_version();
3623 info->patch_version = Abstract_VM_Version::vm_patch_version();
3624
3625 // when we add a new capability in the jvm_version_info struct, we should also
3626 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3627 // counter defined in runtimeService.cpp.
3628 info->is_attach_supported = AttachListener::is_attach_supported();
3629 }
3630 JVM_END
3631
3632 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3633 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3634 ResourceMark rm(THREAD);
3635
3636 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3637 return NULL;
3638 }
3639
3640 char** vm_flags = Arguments::jvm_flags_array();
3641 char** vm_args = Arguments::jvm_args_array();
3642 int num_flags = Arguments::num_jvm_flags();
3643 int num_args = Arguments::num_jvm_args();
3644
3645 InstanceKlass* ik = SystemDictionary::String_klass();
3646 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3647 objArrayHandle result_h(THREAD, r);
3648
3649 int index = 0;
3650 for (int j = 0; j < num_flags; j++, index++) {
3651 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3652 result_h->obj_at_put(index, h());
3653 }
3654 for (int i = 0; i < num_args; i++, index++) {
3655 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3656 result_h->obj_at_put(index, h());
3657 }
3658 return (jobjectArray) JNIHandles::make_local(env, result_h());
3659 JVM_END
3660
3661 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3662 return os::get_signal_number(name);
3663 JVM_END