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 "classfile/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/javaAssertions.hpp"
30 #include "classfile/javaClasses.inline.hpp"
31 #include "classfile/moduleEntry.hpp"
32 #include "classfile/modules.hpp"
33 #include "classfile/packageEntry.hpp"
34 #include "classfile/stringTable.hpp"
35 #include "classfile/systemDictionary.hpp"
36 #include "classfile/vmSymbols.hpp"
37 #include "gc/shared/barrierSet.inline.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/fieldStreams.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/method.hpp"
46 #include "oops/objArrayKlass.hpp"
47 #include "oops/objArrayOop.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "prims/jvm.h"
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/vframe.hpp"
70 #include "runtime/vm_operations.hpp"
71 #include "runtime/vm_version.hpp"
72 #include "services/attachListener.hpp"
73 #include "services/management.hpp"
74 #include "services/threadService.hpp"
75 #include "utilities/copy.hpp"
76 #include "utilities/defaultStream.hpp"
77 #include "utilities/dtrace.hpp"
78 #include "utilities/events.hpp"
79 #include "utilities/histogram.hpp"
80 #include "utilities/macros.hpp"
81 #include "utilities/utf8.hpp"
82 #if INCLUDE_CDS
83 #include "classfile/sharedClassUtil.hpp"
84 #include "classfile/systemDictionaryShared.hpp"
85 #endif
86 #if INCLUDE_TRACE
87 #include "trace/tracing.hpp"
88 #endif
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 jint 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(s->is_oop(), "JVM_ArrayCopy: src not an oop");
331 assert(d->is_oop(), "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 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
657 // is modifying a reference field in the clonee, a non-oop-atomic copy might
658 // be suspended in the middle of copying the pointer and end up with parts
659 // of two different pointers in the field. Subsequent dereferences will crash.
660 // 4846409: an oop-copy of objects with long or double fields or arrays of same
661 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
662 // of oops. We know objects are aligned on a minimum of an jlong boundary.
663 // The same is true of StubRoutines::object_copy and the various oop_copy
664 // variants, and of the code generated by the inline_native_clone intrinsic.
665 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
666 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
667 (size_t)align_object_size(size) / HeapWordsPerLong);
668 // Clear the header
669 new_obj_oop->init_mark();
670
671 // Store check (mark entire object and let gc sort it out)
672 BarrierSet* bs = Universe::heap()->barrier_set();
673 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
674 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
675
676 Handle new_obj(THREAD, new_obj_oop);
677 // Caution: this involves a java upcall, so the clone should be
678 // "gc-robust" by this stage.
679 if (klass->has_finalizer()) {
680 assert(obj->is_instance(), "should be instanceOop");
681 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
682 new_obj = Handle(THREAD, new_obj_oop);
683 }
684
685 return JNIHandles::make_local(env, new_obj());
686 JVM_END
687
688 // java.io.File ///////////////////////////////////////////////////////////////
689
690 JVM_LEAF(char*, JVM_NativePath(char* path))
691 JVMWrapper("JVM_NativePath");
692 return os::native_path(path);
693 JVM_END
694
695
696 // Misc. class handling ///////////////////////////////////////////////////////////
697
698
699 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
700 JVMWrapper("JVM_GetCallerClass");
701
702 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
703 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
704 // temporarily for existing code to use until a replacement API is defined.
705 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
706 Klass* k = thread->security_get_caller_class(depth);
707 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
708 }
709
710 // Getting the class of the caller frame.
711 //
712 // The call stack at this point looks something like this:
713 //
714 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
715 // [1] [ @CallerSensitive API.method ]
716 // [.] [ (skipped intermediate frames) ]
717 // [n] [ caller ]
718 vframeStream vfst(thread);
719 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
720 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
721 Method* m = vfst.method();
722 assert(m != NULL, "sanity");
723 switch (n) {
724 case 0:
725 // This must only be called from Reflection.getCallerClass
726 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
727 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
728 }
729 // fall-through
730 case 1:
731 // Frame 0 and 1 must be caller sensitive.
732 if (!m->caller_sensitive()) {
733 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
734 }
735 break;
736 default:
737 if (!m->is_ignored_by_security_stack_walk()) {
738 // We have reached the desired frame; return the holder class.
739 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
740 }
741 break;
742 }
743 }
744 return NULL;
745 JVM_END
746
747
748 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
749 JVMWrapper("JVM_FindPrimitiveClass");
750 oop mirror = NULL;
751 BasicType t = name2type(utf);
752 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
753 mirror = Universe::java_mirror(t);
754 }
755 if (mirror == NULL) {
756 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
757 } else {
758 return (jclass) JNIHandles::make_local(env, mirror);
759 }
760 JVM_END
761
762
763 // Returns a class loaded by the bootstrap class loader; or null
764 // if not found. ClassNotFoundException is not thrown.
765 // FindClassFromBootLoader is exported to the launcher for windows.
766 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
767 const char* name))
768 JVMWrapper("JVM_FindClassFromBootLoader");
769
770 // Java libraries should ensure that name is never null...
771 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
772 // It's impossible to create this class; the name cannot fit
773 // into the constant pool.
774 return NULL;
775 }
776
777 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
778 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
779 if (k == NULL) {
780 return NULL;
781 }
782
783 if (log_is_enabled(Debug, class, resolve)) {
784 trace_class_resolution(k);
785 }
786 return (jclass) JNIHandles::make_local(env, k->java_mirror());
787 JVM_END
788
789 // Find a class with this name in this loader, using the caller's protection domain.
790 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
791 jboolean init, jobject loader,
792 jclass caller))
793 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
794 // Java libraries should ensure that name is never null...
795 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
796 // It's impossible to create this class; the name cannot fit
797 // into the constant pool.
798 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
799 }
800
801 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
802
803 oop loader_oop = JNIHandles::resolve(loader);
804 oop from_class = JNIHandles::resolve(caller);
805 oop protection_domain = NULL;
806 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
807 // NPE. Put it in another way, the bootstrap class loader has all permission and
808 // thus no checkPackageAccess equivalence in the VM class loader.
809 // The caller is also passed as NULL by the java code if there is no security
810 // manager to avoid the performance cost of getting the calling class.
811 if (from_class != NULL && loader_oop != NULL) {
812 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
813 }
814
815 Handle h_loader(THREAD, loader_oop);
816 Handle h_prot(THREAD, protection_domain);
817 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
818 h_prot, false, THREAD);
819
820 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
821 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
822 }
823 return result;
824 JVM_END
825
826 // Currently only called from the old verifier.
827 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
828 jboolean init, jclass from))
829 JVMWrapper("JVM_FindClassFromClass");
830 if (name == NULL) {
831 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
832 }
833 if ((int)strlen(name) > Symbol::max_length()) {
834 // It's impossible to create this class; the name cannot fit
835 // into the constant pool.
836 Exceptions::fthrow(THREAD_AND_LOCATION,
837 vmSymbols::java_lang_NoClassDefFoundError(),
838 "Class name exceeds maximum length of %d: %s",
839 Symbol::max_length(),
840 name);
841 return 0;
842 }
843 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
844 oop from_class_oop = JNIHandles::resolve(from);
845 Klass* from_class = (from_class_oop == NULL)
846 ? (Klass*)NULL
847 : java_lang_Class::as_Klass(from_class_oop);
848 oop class_loader = NULL;
849 oop protection_domain = NULL;
850 if (from_class != NULL) {
851 class_loader = from_class->class_loader();
852 protection_domain = from_class->protection_domain();
853 }
854 Handle h_loader(THREAD, class_loader);
855 Handle h_prot (THREAD, protection_domain);
856 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
857 h_prot, true, thread);
858
859 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
860 // this function is generally only used for class loading during verification.
861 ResourceMark rm;
862 oop from_mirror = JNIHandles::resolve_non_null(from);
863 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
864 const char * from_name = from_class->external_name();
865
866 oop mirror = JNIHandles::resolve_non_null(result);
867 Klass* to_class = java_lang_Class::as_Klass(mirror);
868 const char * to = to_class->external_name();
869 log_debug(class, resolve)("%s %s (verification)", from_name, to);
870 }
871
872 return result;
873 JVM_END
874
875 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
876 if (loader.is_null()) {
877 return;
878 }
879
880 // check whether the current caller thread holds the lock or not.
881 // If not, increment the corresponding counter
882 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
883 ObjectSynchronizer::owner_self) {
884 counter->inc();
885 }
886 }
887
888 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
889 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
890 jobject loader, const jbyte *buf,
891 jsize len, jobject pd, const char *source,
892 TRAPS) {
893 if (source == NULL) source = "__JVM_DefineClass__";
894
895 assert(THREAD->is_Java_thread(), "must be a JavaThread");
896 JavaThread* jt = (JavaThread*) THREAD;
897
898 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
899 ClassLoader::perf_define_appclass_selftime(),
900 ClassLoader::perf_define_appclasses(),
901 jt->get_thread_stat()->perf_recursion_counts_addr(),
902 jt->get_thread_stat()->perf_timers_addr(),
903 PerfClassTraceTime::DEFINE_CLASS);
904
905 if (UsePerfData) {
906 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
907 }
908
909 // Since exceptions can be thrown, class initialization can take place
910 // if name is NULL no check for class name in .class stream has to be made.
911 TempNewSymbol class_name = NULL;
912 if (name != NULL) {
913 const int str_len = (int)strlen(name);
914 if (str_len > Symbol::max_length()) {
915 // It's impossible to create this class; the name cannot fit
916 // into the constant pool.
917 Exceptions::fthrow(THREAD_AND_LOCATION,
918 vmSymbols::java_lang_NoClassDefFoundError(),
919 "Class name exceeds maximum length of %d: %s",
920 Symbol::max_length(),
921 name);
922 return 0;
923 }
924 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
925 }
926
927 ResourceMark rm(THREAD);
928 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
929 Handle class_loader (THREAD, JNIHandles::resolve(loader));
930 if (UsePerfData) {
931 is_lock_held_by_thread(class_loader,
932 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
933 THREAD);
934 }
935 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
936 Klass* k = SystemDictionary::resolve_from_stream(class_name,
937 class_loader,
938 protection_domain,
939 &st,
940 CHECK_NULL);
941
942 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
943 trace_class_resolution(k);
944 }
945
946 return (jclass) JNIHandles::make_local(env, k->java_mirror());
947 }
948
949
950 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
951 JVMWrapper("JVM_DefineClass");
952
953 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
954 JVM_END
955
956
957 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
958 JVMWrapper("JVM_DefineClassWithSource");
959
960 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
961 JVM_END
962
963 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
964 JVMWrapper("JVM_FindLoadedClass");
965 ResourceMark rm(THREAD);
966
967 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
968 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
969
970 const char* str = java_lang_String::as_utf8_string(string());
971 // Sanity check, don't expect null
972 if (str == NULL) return NULL;
973
974 const int str_len = (int)strlen(str);
975 if (str_len > Symbol::max_length()) {
976 // It's impossible to create this class; the name cannot fit
977 // into the constant pool.
978 return NULL;
979 }
980 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
981
982 // Security Note:
983 // The Java level wrapper will perform the necessary security check allowing
984 // us to pass the NULL as the initiating class loader.
985 Handle h_loader(THREAD, JNIHandles::resolve(loader));
986 if (UsePerfData) {
987 is_lock_held_by_thread(h_loader,
988 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
989 THREAD);
990 }
991
992 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
993 h_loader,
994 Handle(),
995 CHECK_NULL);
996 #if INCLUDE_CDS
997 if (k == NULL) {
998 // If the class is not already loaded, try to see if it's in the shared
999 // archive for the current classloader (h_loader).
1000 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1001 }
1002 #endif
1003 return (k == NULL) ? NULL :
1004 (jclass) JNIHandles::make_local(env, k->java_mirror());
1005 JVM_END
1006
1007 // Module support //////////////////////////////////////////////////////////////////////////////
1008
1009 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1010 jstring location, const char* const* packages, jsize num_packages))
1011 JVMWrapper("JVM_DefineModule");
1012 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1013 JVM_END
1014
1015 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1016 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1017 Modules::set_bootloader_unnamed_module(module, CHECK);
1018 JVM_END
1019
1020 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1021 JVMWrapper("JVM_AddModuleExports");
1022 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1023 JVM_END
1024
1025 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1026 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1027 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1028 JVM_END
1029
1030 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1031 JVMWrapper("JVM_AddModuleExportsToAll");
1032 Modules::add_module_exports(from_module, package, NULL, CHECK);
1033 JVM_END
1034
1035 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1036 JVMWrapper("JVM_AddReadsModule");
1037 Modules::add_reads_module(from_module, source_module, CHECK);
1038 JVM_END
1039
1040 JVM_ENTRY (void, JVM_AddModulePackage(JNIEnv *env, jobject module, const char* package))
1041 JVMWrapper("JVM_AddModulePackage");
1042 Modules::add_module_package(module, package, CHECK);
1043 JVM_END
1044
1045 // Reflection support //////////////////////////////////////////////////////////////////////////////
1046
1047 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1048 assert (cls != NULL, "illegal class");
1049 JVMWrapper("JVM_GetClassName");
1050 JvmtiVMObjectAllocEventCollector oam;
1051 ResourceMark rm(THREAD);
1052 const char* name;
1053 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1054 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1055 } else {
1056 // Consider caching interned string in Klass
1057 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1058 assert(k->is_klass(), "just checking");
1059 name = k->external_name();
1060 }
1061 oop result = StringTable::intern((char*) name, CHECK_NULL);
1062 return (jstring) JNIHandles::make_local(env, result);
1063 JVM_END
1064
1065
1066 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1067 JVMWrapper("JVM_GetClassInterfaces");
1068 JvmtiVMObjectAllocEventCollector oam;
1069 oop mirror = JNIHandles::resolve_non_null(cls);
1070
1071 // Special handling for primitive objects
1072 if (java_lang_Class::is_primitive(mirror)) {
1073 // Primitive objects does not have any interfaces
1074 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1075 return (jobjectArray) JNIHandles::make_local(env, r);
1076 }
1077
1078 Klass* klass = java_lang_Class::as_Klass(mirror);
1079 // Figure size of result array
1080 int size;
1081 if (klass->is_instance_klass()) {
1082 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1083 } else {
1084 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1085 size = 2;
1086 }
1087
1088 // Allocate result array
1089 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1090 objArrayHandle result (THREAD, r);
1091 // Fill in result
1092 if (klass->is_instance_klass()) {
1093 // Regular instance klass, fill in all local interfaces
1094 for (int index = 0; index < size; index++) {
1095 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1096 result->obj_at_put(index, k->java_mirror());
1097 }
1098 } else {
1099 // All arrays implement java.lang.Cloneable and java.io.Serializable
1100 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1101 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1102 }
1103 return (jobjectArray) JNIHandles::make_local(env, result());
1104 JVM_END
1105
1106
1107 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1108 JVMWrapper("JVM_IsInterface");
1109 oop mirror = JNIHandles::resolve_non_null(cls);
1110 if (java_lang_Class::is_primitive(mirror)) {
1111 return JNI_FALSE;
1112 }
1113 Klass* k = java_lang_Class::as_Klass(mirror);
1114 jboolean result = k->is_interface();
1115 assert(!result || k->is_instance_klass(),
1116 "all interfaces are instance types");
1117 // The compiler intrinsic for isInterface tests the
1118 // Klass::_access_flags bits in the same way.
1119 return result;
1120 JVM_END
1121
1122
1123 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1124 JVMWrapper("JVM_GetClassSigners");
1125 JvmtiVMObjectAllocEventCollector oam;
1126 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1127 // There are no signers for primitive types
1128 return NULL;
1129 }
1130
1131 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1132
1133 // If there are no signers set in the class, or if the class
1134 // is an array, return NULL.
1135 if (signers == NULL) return NULL;
1136
1137 // copy of the signers array
1138 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1139 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1140 for (int index = 0; index < signers->length(); index++) {
1141 signers_copy->obj_at_put(index, signers->obj_at(index));
1142 }
1143
1144 // return the copy
1145 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1146 JVM_END
1147
1148
1149 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1150 JVMWrapper("JVM_SetClassSigners");
1151 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1152 // This call is ignored for primitive types and arrays.
1153 // Signers are only set once, ClassLoader.java, and thus shouldn't
1154 // be called with an array. Only the bootstrap loader creates arrays.
1155 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1156 if (k->is_instance_klass()) {
1157 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1158 }
1159 }
1160 JVM_END
1161
1162
1163 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1164 JVMWrapper("JVM_GetProtectionDomain");
1165 if (JNIHandles::resolve(cls) == NULL) {
1166 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1167 }
1168
1169 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1170 // Primitive types does not have a protection domain.
1171 return NULL;
1172 }
1173
1174 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1175 return (jobject) JNIHandles::make_local(env, pd);
1176 JVM_END
1177
1178
1179 static bool is_authorized(Handle context, InstanceKlass* klass, TRAPS) {
1180 // If there is a security manager and protection domain, check the access
1181 // in the protection domain, otherwise it is authorized.
1182 if (java_lang_System::has_security_manager()) {
1183
1184 // For bootstrapping, if pd implies method isn't in the JDK, allow
1185 // this context to revert to older behavior.
1186 // In this case the isAuthorized field in AccessControlContext is also not
1187 // present.
1188 if (Universe::protection_domain_implies_method() == NULL) {
1189 return true;
1190 }
1191
1192 // Whitelist certain access control contexts
1193 if (java_security_AccessControlContext::is_authorized(context)) {
1194 return true;
1195 }
1196
1197 oop prot = klass->protection_domain();
1198 if (prot != NULL) {
1199 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1200 // in the new wrapper.
1201 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1202 Handle h_prot(THREAD, prot);
1203 JavaValue result(T_BOOLEAN);
1204 JavaCallArguments args(h_prot);
1205 JavaCalls::call(&result, m, &args, CHECK_false);
1206 return (result.get_jboolean() != 0);
1207 }
1208 }
1209 return true;
1210 }
1211
1212 // Create an AccessControlContext with a protection domain with null codesource
1213 // and null permissions - which gives no permissions.
1214 oop create_dummy_access_control_context(TRAPS) {
1215 InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1216 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1217 // Call constructor ProtectionDomain(null, null);
1218 JavaValue result(T_VOID);
1219 JavaCalls::call_special(&result, obj, pd_klass,
1220 vmSymbols::object_initializer_name(),
1221 vmSymbols::codesource_permissioncollection_signature(),
1222 Handle(), Handle(), CHECK_NULL);
1223
1224 // new ProtectionDomain[] {pd};
1225 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1226 context->obj_at_put(0, obj());
1227
1228 // new AccessControlContext(new ProtectionDomain[] {pd})
1229 objArrayHandle h_context(THREAD, context);
1230 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1231 return acc;
1232 }
1233
1234 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1235 JVMWrapper("JVM_DoPrivileged");
1236
1237 if (action == NULL) {
1238 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1239 }
1240
1241 // Compute the frame initiating the do privileged operation and setup the privileged stack
1242 vframeStream vfst(thread);
1243 vfst.security_get_caller_frame(1);
1244
1245 if (vfst.at_end()) {
1246 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1247 }
1248
1249 Method* method = vfst.method();
1250 InstanceKlass* klass = method->method_holder();
1251
1252 // Check that action object understands "Object run()"
1253 Handle h_context;
1254 if (context != NULL) {
1255 h_context = Handle(THREAD, JNIHandles::resolve(context));
1256 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1257 if (!authorized) {
1258 // Create an unprivileged access control object and call it's run function
1259 // instead.
1260 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1261 h_context = Handle(THREAD, noprivs);
1262 }
1263 }
1264
1265 // Check that action object understands "Object run()"
1266 Handle object (THREAD, JNIHandles::resolve(action));
1267
1268 // get run() method
1269 Method* m_oop = object->klass()->uncached_lookup_method(
1270 vmSymbols::run_method_name(),
1271 vmSymbols::void_object_signature(),
1272 Klass::find_overpass);
1273 methodHandle m (THREAD, m_oop);
1274 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1275 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1276 }
1277
1278 // Stack allocated list of privileged stack elements
1279 PrivilegedElement pi;
1280 if (!vfst.at_end()) {
1281 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1282 thread->set_privileged_stack_top(&pi);
1283 }
1284
1285
1286 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1287 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1288 Handle pending_exception;
1289 JavaValue result(T_OBJECT);
1290 JavaCallArguments args(object);
1291 JavaCalls::call(&result, m, &args, THREAD);
1292
1293 // done with action, remove ourselves from the list
1294 if (!vfst.at_end()) {
1295 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1296 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1297 }
1298
1299 if (HAS_PENDING_EXCEPTION) {
1300 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1301 CLEAR_PENDING_EXCEPTION;
1302 // JVMTI has already reported the pending exception
1303 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1304 if (THREAD->is_Java_thread()) {
1305 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1306 }
1307 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1308 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1309 // Throw a java.security.PrivilegedActionException(Exception e) exception
1310 JavaCallArguments args(pending_exception);
1311 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1312 vmSymbols::exception_void_signature(),
1313 &args);
1314 }
1315 }
1316
1317 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1318 return JNIHandles::make_local(env, (oop) result.get_jobject());
1319 JVM_END
1320
1321
1322 // Returns the inherited_access_control_context field of the running thread.
1323 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1324 JVMWrapper("JVM_GetInheritedAccessControlContext");
1325 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1326 return JNIHandles::make_local(env, result);
1327 JVM_END
1328
1329 class RegisterArrayForGC {
1330 private:
1331 JavaThread *_thread;
1332 public:
1333 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1334 _thread = thread;
1335 _thread->register_array_for_gc(array);
1336 }
1337
1338 ~RegisterArrayForGC() {
1339 _thread->register_array_for_gc(NULL);
1340 }
1341 };
1342
1343
1344 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1345 JVMWrapper("JVM_GetStackAccessControlContext");
1346 if (!UsePrivilegedStack) return NULL;
1347
1348 ResourceMark rm(THREAD);
1349 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1350 JvmtiVMObjectAllocEventCollector oam;
1351
1352 // count the protection domains on the execution stack. We collapse
1353 // duplicate consecutive protection domains into a single one, as
1354 // well as stopping when we hit a privileged frame.
1355
1356 // Use vframeStream to iterate through Java frames
1357 vframeStream vfst(thread);
1358
1359 oop previous_protection_domain = NULL;
1360 Handle privileged_context(thread, NULL);
1361 bool is_privileged = false;
1362 oop protection_domain = NULL;
1363
1364 for(; !vfst.at_end(); vfst.next()) {
1365 // get method of frame
1366 Method* method = vfst.method();
1367 intptr_t* frame_id = vfst.frame_id();
1368
1369 // check the privileged frames to see if we have a match
1370 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1371 // this frame is privileged
1372 is_privileged = true;
1373 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1374 protection_domain = thread->privileged_stack_top()->protection_domain();
1375 } else {
1376 protection_domain = method->method_holder()->protection_domain();
1377 }
1378
1379 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1380 local_array->push(protection_domain);
1381 previous_protection_domain = protection_domain;
1382 }
1383
1384 if (is_privileged) break;
1385 }
1386
1387
1388 // either all the domains on the stack were system domains, or
1389 // we had a privileged system domain
1390 if (local_array->is_empty()) {
1391 if (is_privileged && privileged_context.is_null()) return NULL;
1392
1393 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1394 return JNIHandles::make_local(env, result);
1395 }
1396
1397 // the resource area must be registered in case of a gc
1398 RegisterArrayForGC ragc(thread, local_array);
1399 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1400 local_array->length(), CHECK_NULL);
1401 objArrayHandle h_context(thread, context);
1402 for (int index = 0; index < local_array->length(); index++) {
1403 h_context->obj_at_put(index, local_array->at(index));
1404 }
1405
1406 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1407
1408 return JNIHandles::make_local(env, result);
1409 JVM_END
1410
1411
1412 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1413 JVMWrapper("JVM_IsArrayClass");
1414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1415 return (k != NULL) && k->is_array_klass() ? true : false;
1416 JVM_END
1417
1418
1419 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1420 JVMWrapper("JVM_IsPrimitiveClass");
1421 oop mirror = JNIHandles::resolve_non_null(cls);
1422 return (jboolean) java_lang_Class::is_primitive(mirror);
1423 JVM_END
1424
1425
1426 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1427 JVMWrapper("JVM_GetClassModifiers");
1428 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1429 // Primitive type
1430 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1431 }
1432
1433 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1434 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1435 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1436 return k->modifier_flags();
1437 JVM_END
1438
1439
1440 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1441
1442 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1443 JvmtiVMObjectAllocEventCollector oam;
1444 // ofClass is a reference to a java_lang_Class object. The mirror object
1445 // of an InstanceKlass
1446
1447 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1448 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1449 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1450 return (jobjectArray)JNIHandles::make_local(env, result);
1451 }
1452
1453 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1454 InnerClassesIterator iter(k);
1455
1456 if (iter.length() == 0) {
1457 // Neither an inner nor outer class
1458 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1459 return (jobjectArray)JNIHandles::make_local(env, result);
1460 }
1461
1462 // find inner class info
1463 constantPoolHandle cp(thread, k->constants());
1464 int length = iter.length();
1465
1466 // Allocate temp. result array
1467 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1468 objArrayHandle result (THREAD, r);
1469 int members = 0;
1470
1471 for (; !iter.done(); iter.next()) {
1472 int ioff = iter.inner_class_info_index();
1473 int ooff = iter.outer_class_info_index();
1474
1475 if (ioff != 0 && ooff != 0) {
1476 // Check to see if the name matches the class we're looking for
1477 // before attempting to find the class.
1478 if (cp->klass_name_at_matches(k, ooff)) {
1479 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1480 if (outer_klass == k) {
1481 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1482 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1483
1484 // Throws an exception if outer klass has not declared k as
1485 // an inner klass
1486 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1487
1488 result->obj_at_put(members, inner_klass->java_mirror());
1489 members++;
1490 }
1491 }
1492 }
1493 }
1494
1495 if (members != length) {
1496 // Return array of right length
1497 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1498 for(int i = 0; i < members; i++) {
1499 res->obj_at_put(i, result->obj_at(i));
1500 }
1501 return (jobjectArray)JNIHandles::make_local(env, res);
1502 }
1503
1504 return (jobjectArray)JNIHandles::make_local(env, result());
1505 JVM_END
1506
1507
1508 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1509 {
1510 // ofClass is a reference to a java_lang_Class object.
1511 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1512 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1513 return NULL;
1514 }
1515
1516 bool inner_is_member = false;
1517 Klass* outer_klass
1518 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1519 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1520 if (outer_klass == NULL) return NULL; // already a top-level class
1521 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1522 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1523 }
1524 JVM_END
1525
1526 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1527 {
1528 oop mirror = JNIHandles::resolve_non_null(cls);
1529 if (java_lang_Class::is_primitive(mirror) ||
1530 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1531 return NULL;
1532 }
1533 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1534 int ooff = 0, noff = 0;
1535 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1536 if (noff != 0) {
1537 constantPoolHandle i_cp(thread, k->constants());
1538 Symbol* name = i_cp->symbol_at(noff);
1539 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1540 return (jstring) JNIHandles::make_local(env, str());
1541 }
1542 }
1543 return NULL;
1544 }
1545 JVM_END
1546
1547 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1548 assert (cls != NULL, "illegal class");
1549 JVMWrapper("JVM_GetClassSignature");
1550 JvmtiVMObjectAllocEventCollector oam;
1551 ResourceMark rm(THREAD);
1552 // Return null for arrays and primatives
1553 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1555 if (k->is_instance_klass()) {
1556 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1557 if (sym == NULL) return NULL;
1558 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1559 return (jstring) JNIHandles::make_local(env, str());
1560 }
1561 }
1562 return NULL;
1563 JVM_END
1564
1565
1566 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1567 assert (cls != NULL, "illegal class");
1568 JVMWrapper("JVM_GetClassAnnotations");
1569
1570 // Return null for arrays and primitives
1571 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1572 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1573 if (k->is_instance_klass()) {
1574 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1575 return (jbyteArray) JNIHandles::make_local(env, a);
1576 }
1577 }
1578 return NULL;
1579 JVM_END
1580
1581
1582 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1583 // some of this code was adapted from from jni_FromReflectedField
1584
1585 oop reflected = JNIHandles::resolve_non_null(field);
1586 oop mirror = java_lang_reflect_Field::clazz(reflected);
1587 Klass* k = java_lang_Class::as_Klass(mirror);
1588 int slot = java_lang_reflect_Field::slot(reflected);
1589 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1590
1591 InstanceKlass* ik = InstanceKlass::cast(k);
1592 intptr_t offset = ik->field_offset(slot);
1593
1594 if (modifiers & JVM_ACC_STATIC) {
1595 // for static fields we only look in the current class
1596 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1597 assert(false, "cannot find static field");
1598 return false;
1599 }
1600 } else {
1601 // for instance fields we start with the current class and work
1602 // our way up through the superclass chain
1603 if (!ik->find_field_from_offset(offset, false, &fd)) {
1604 assert(false, "cannot find instance field");
1605 return false;
1606 }
1607 }
1608 return true;
1609 }
1610
1611 static Method* jvm_get_method_common(jobject method) {
1612 // some of this code was adapted from from jni_FromReflectedMethod
1613
1614 oop reflected = JNIHandles::resolve_non_null(method);
1615 oop mirror = NULL;
1616 int slot = 0;
1617
1618 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1619 mirror = java_lang_reflect_Constructor::clazz(reflected);
1620 slot = java_lang_reflect_Constructor::slot(reflected);
1621 } else {
1622 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1623 "wrong type");
1624 mirror = java_lang_reflect_Method::clazz(reflected);
1625 slot = java_lang_reflect_Method::slot(reflected);
1626 }
1627 Klass* k = java_lang_Class::as_Klass(mirror);
1628
1629 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1630 assert(m != NULL, "cannot find method");
1631 return m; // caller has to deal with NULL in product mode
1632 }
1633
1634 /* Type use annotations support (JDK 1.8) */
1635
1636 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1637 assert (cls != NULL, "illegal class");
1638 JVMWrapper("JVM_GetClassTypeAnnotations");
1639 ResourceMark rm(THREAD);
1640 // Return null for arrays and primitives
1641 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1642 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1643 if (k->is_instance_klass()) {
1644 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1645 if (type_annotations != NULL) {
1646 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1647 return (jbyteArray) JNIHandles::make_local(env, a);
1648 }
1649 }
1650 }
1651 return NULL;
1652 JVM_END
1653
1654 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1655 assert (method != NULL, "illegal method");
1656 JVMWrapper("JVM_GetMethodTypeAnnotations");
1657
1658 // method is a handle to a java.lang.reflect.Method object
1659 Method* m = jvm_get_method_common(method);
1660 if (m == NULL) {
1661 return NULL;
1662 }
1663
1664 AnnotationArray* type_annotations = m->type_annotations();
1665 if (type_annotations != NULL) {
1666 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1667 return (jbyteArray) JNIHandles::make_local(env, a);
1668 }
1669
1670 return NULL;
1671 JVM_END
1672
1673 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1674 assert (field != NULL, "illegal field");
1675 JVMWrapper("JVM_GetFieldTypeAnnotations");
1676
1677 fieldDescriptor fd;
1678 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1679 if (!gotFd) {
1680 return NULL;
1681 }
1682
1683 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1684 JVM_END
1685
1686 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1687 if (!cp->is_within_bounds(index)) {
1688 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1689 }
1690 }
1691
1692 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1693 {
1694 JVMWrapper("JVM_GetMethodParameters");
1695 // method is a handle to a java.lang.reflect.Method object
1696 Method* method_ptr = jvm_get_method_common(method);
1697 methodHandle mh (THREAD, method_ptr);
1698 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1699 const int num_params = mh->method_parameters_length();
1700
1701 if (num_params < 0) {
1702 // A -1 return value from method_parameters_length means there is no
1703 // parameter data. Return null to indicate this to the reflection
1704 // API.
1705 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1706 return (jobjectArray)NULL;
1707 } else {
1708 // Otherwise, we return something up to reflection, even if it is
1709 // a zero-length array. Why? Because in some cases this can
1710 // trigger a MalformedParametersException.
1711
1712 // make sure all the symbols are properly formatted
1713 for (int i = 0; i < num_params; i++) {
1714 MethodParametersElement* params = mh->method_parameters_start();
1715 int index = params[i].name_cp_index;
1716 bounds_check(mh->constants(), index, CHECK_NULL);
1717
1718 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1719 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1720 "Wrong type at constant pool index");
1721 }
1722
1723 }
1724
1725 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1726 objArrayHandle result (THREAD, result_oop);
1727
1728 for (int i = 0; i < num_params; i++) {
1729 MethodParametersElement* params = mh->method_parameters_start();
1730 // For a 0 index, give a NULL symbol
1731 Symbol* sym = 0 != params[i].name_cp_index ?
1732 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1733 int flags = params[i].flags;
1734 oop param = Reflection::new_parameter(reflected_method, i, sym,
1735 flags, CHECK_NULL);
1736 result->obj_at_put(i, param);
1737 }
1738 return (jobjectArray)JNIHandles::make_local(env, result());
1739 }
1740 }
1741 JVM_END
1742
1743 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1744
1745 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1746 {
1747 JVMWrapper("JVM_GetClassDeclaredFields");
1748 JvmtiVMObjectAllocEventCollector oam;
1749
1750 // Exclude primitive types and array types
1751 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1752 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1753 // Return empty array
1754 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1755 return (jobjectArray) JNIHandles::make_local(env, res);
1756 }
1757
1758 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1759 constantPoolHandle cp(THREAD, k->constants());
1760
1761 // Ensure class is linked
1762 k->link_class(CHECK_NULL);
1763
1764 // Allocate result
1765 int num_fields;
1766
1767 if (publicOnly) {
1768 num_fields = 0;
1769 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1770 if (fs.access_flags().is_public()) ++num_fields;
1771 }
1772 } else {
1773 num_fields = k->java_fields_count();
1774 }
1775
1776 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1777 objArrayHandle result (THREAD, r);
1778
1779 int out_idx = 0;
1780 fieldDescriptor fd;
1781 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1782 if (!publicOnly || fs.access_flags().is_public()) {
1783 fd.reinitialize(k, fs.index());
1784 oop field = Reflection::new_field(&fd, CHECK_NULL);
1785 result->obj_at_put(out_idx, field);
1786 ++out_idx;
1787 }
1788 }
1789 assert(out_idx == num_fields, "just checking");
1790 return (jobjectArray) JNIHandles::make_local(env, result());
1791 }
1792 JVM_END
1793
1794 static bool select_method(methodHandle method, bool want_constructor) {
1795 if (want_constructor) {
1796 return (method->is_initializer() && !method->is_static());
1797 } else {
1798 return (!method->is_initializer() && !method->is_overpass());
1799 }
1800 }
1801
1802 static jobjectArray get_class_declared_methods_helper(
1803 JNIEnv *env,
1804 jclass ofClass, jboolean publicOnly,
1805 bool want_constructor,
1806 Klass* klass, TRAPS) {
1807
1808 JvmtiVMObjectAllocEventCollector oam;
1809
1810 // Exclude primitive types and array types
1811 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1812 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1813 // Return empty array
1814 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1815 return (jobjectArray) JNIHandles::make_local(env, res);
1816 }
1817
1818 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1819
1820 // Ensure class is linked
1821 k->link_class(CHECK_NULL);
1822
1823 Array<Method*>* methods = k->methods();
1824 int methods_length = methods->length();
1825
1826 // Save original method_idnum in case of redefinition, which can change
1827 // the idnum of obsolete methods. The new method will have the same idnum
1828 // but if we refresh the methods array, the counts will be wrong.
1829 ResourceMark rm(THREAD);
1830 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1831 int num_methods = 0;
1832
1833 for (int i = 0; i < methods_length; i++) {
1834 methodHandle method(THREAD, methods->at(i));
1835 if (select_method(method, want_constructor)) {
1836 if (!publicOnly || method->is_public()) {
1837 idnums->push(method->method_idnum());
1838 ++num_methods;
1839 }
1840 }
1841 }
1842
1843 // Allocate result
1844 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1845 objArrayHandle result (THREAD, r);
1846
1847 // Now just put the methods that we selected above, but go by their idnum
1848 // in case of redefinition. The methods can be redefined at any safepoint,
1849 // so above when allocating the oop array and below when creating reflect
1850 // objects.
1851 for (int i = 0; i < num_methods; i++) {
1852 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1853 if (method.is_null()) {
1854 // Method may have been deleted and seems this API can handle null
1855 // Otherwise should probably put a method that throws NSME
1856 result->obj_at_put(i, NULL);
1857 } else {
1858 oop m;
1859 if (want_constructor) {
1860 m = Reflection::new_constructor(method, CHECK_NULL);
1861 } else {
1862 m = Reflection::new_method(method, false, CHECK_NULL);
1863 }
1864 result->obj_at_put(i, m);
1865 }
1866 }
1867
1868 return (jobjectArray) JNIHandles::make_local(env, result());
1869 }
1870
1871 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1872 {
1873 JVMWrapper("JVM_GetClassDeclaredMethods");
1874 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1875 /*want_constructor*/ false,
1876 SystemDictionary::reflect_Method_klass(), THREAD);
1877 }
1878 JVM_END
1879
1880 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1881 {
1882 JVMWrapper("JVM_GetClassDeclaredConstructors");
1883 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1884 /*want_constructor*/ true,
1885 SystemDictionary::reflect_Constructor_klass(), THREAD);
1886 }
1887 JVM_END
1888
1889 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1890 {
1891 JVMWrapper("JVM_GetClassAccessFlags");
1892 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1893 // Primitive type
1894 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1895 }
1896
1897 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1898 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1899 }
1900 JVM_END
1901
1902
1903 // Constant pool access //////////////////////////////////////////////////////////
1904
1905 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1906 {
1907 JVMWrapper("JVM_GetClassConstantPool");
1908 JvmtiVMObjectAllocEventCollector oam;
1909
1910 // Return null for primitives and arrays
1911 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1912 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1913 if (k->is_instance_klass()) {
1914 InstanceKlass* k_h = InstanceKlass::cast(k);
1915 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1916 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1917 return JNIHandles::make_local(jcp());
1918 }
1919 }
1920 return NULL;
1921 }
1922 JVM_END
1923
1924
1925 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1926 {
1927 JVMWrapper("JVM_ConstantPoolGetSize");
1928 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1929 return cp->length();
1930 }
1931 JVM_END
1932
1933
1934 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1935 {
1936 JVMWrapper("JVM_ConstantPoolGetClassAt");
1937 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1938 bounds_check(cp, index, CHECK_NULL);
1939 constantTag tag = cp->tag_at(index);
1940 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1941 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1942 }
1943 Klass* k = cp->klass_at(index, CHECK_NULL);
1944 return (jclass) JNIHandles::make_local(k->java_mirror());
1945 }
1946 JVM_END
1947
1948 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1949 {
1950 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1951 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1952 bounds_check(cp, index, CHECK_NULL);
1953 constantTag tag = cp->tag_at(index);
1954 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1955 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1956 }
1957 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1958 if (k == NULL) return NULL;
1959 return (jclass) JNIHandles::make_local(k->java_mirror());
1960 }
1961 JVM_END
1962
1963 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1964 constantTag tag = cp->tag_at(index);
1965 if (!tag.is_method() && !tag.is_interface_method()) {
1966 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1967 }
1968 int klass_ref = cp->uncached_klass_ref_index_at(index);
1969 Klass* k_o;
1970 if (force_resolution) {
1971 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1972 } else {
1973 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1974 if (k_o == NULL) return NULL;
1975 }
1976 InstanceKlass* k = InstanceKlass::cast(k_o);
1977 Symbol* name = cp->uncached_name_ref_at(index);
1978 Symbol* sig = cp->uncached_signature_ref_at(index);
1979 methodHandle m (THREAD, k->find_method(name, sig));
1980 if (m.is_null()) {
1981 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1982 }
1983 oop method;
1984 if (!m->is_initializer() || m->is_static()) {
1985 method = Reflection::new_method(m, true, CHECK_NULL);
1986 } else {
1987 method = Reflection::new_constructor(m, CHECK_NULL);
1988 }
1989 return JNIHandles::make_local(method);
1990 }
1991
1992 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1993 {
1994 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1995 JvmtiVMObjectAllocEventCollector oam;
1996 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1997 bounds_check(cp, index, CHECK_NULL);
1998 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1999 return res;
2000 }
2001 JVM_END
2002
2003 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2004 {
2005 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2006 JvmtiVMObjectAllocEventCollector oam;
2007 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2008 bounds_check(cp, index, CHECK_NULL);
2009 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2010 return res;
2011 }
2012 JVM_END
2013
2014 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2015 constantTag tag = cp->tag_at(index);
2016 if (!tag.is_field()) {
2017 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2018 }
2019 int klass_ref = cp->uncached_klass_ref_index_at(index);
2020 Klass* k_o;
2021 if (force_resolution) {
2022 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2023 } else {
2024 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2025 if (k_o == NULL) return NULL;
2026 }
2027 InstanceKlass* k = InstanceKlass::cast(k_o);
2028 Symbol* name = cp->uncached_name_ref_at(index);
2029 Symbol* sig = cp->uncached_signature_ref_at(index);
2030 fieldDescriptor fd;
2031 Klass* target_klass = k->find_field(name, sig, &fd);
2032 if (target_klass == NULL) {
2033 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2034 }
2035 oop field = Reflection::new_field(&fd, CHECK_NULL);
2036 return JNIHandles::make_local(field);
2037 }
2038
2039 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2040 {
2041 JVMWrapper("JVM_ConstantPoolGetFieldAt");
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 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2046 return res;
2047 }
2048 JVM_END
2049
2050 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2051 {
2052 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2053 JvmtiVMObjectAllocEventCollector oam;
2054 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2055 bounds_check(cp, index, CHECK_NULL);
2056 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2057 return res;
2058 }
2059 JVM_END
2060
2061 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2062 {
2063 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2064 JvmtiVMObjectAllocEventCollector oam;
2065 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2066 bounds_check(cp, index, CHECK_NULL);
2067 constantTag tag = cp->tag_at(index);
2068 if (!tag.is_field_or_method()) {
2069 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2070 }
2071 int klass_ref = cp->uncached_klass_ref_index_at(index);
2072 Symbol* klass_name = cp->klass_name_at(klass_ref);
2073 Symbol* member_name = cp->uncached_name_ref_at(index);
2074 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2075 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2076 objArrayHandle dest(THREAD, dest_o);
2077 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2078 dest->obj_at_put(0, str());
2079 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2080 dest->obj_at_put(1, str());
2081 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2082 dest->obj_at_put(2, str());
2083 return (jobjectArray) JNIHandles::make_local(dest());
2084 }
2085 JVM_END
2086
2087 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2088 {
2089 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2090 JvmtiVMObjectAllocEventCollector oam;
2091 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 bounds_check(cp, index, CHECK_0);
2093 constantTag tag = cp->tag_at(index);
2094 if (!tag.is_field_or_method()) {
2095 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2096 }
2097 return (jint) cp->uncached_klass_ref_index_at(index);
2098 }
2099 JVM_END
2100
2101 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2102 {
2103 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2104 JvmtiVMObjectAllocEventCollector oam;
2105 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2106 bounds_check(cp, index, CHECK_0);
2107 constantTag tag = cp->tag_at(index);
2108 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2109 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2110 }
2111 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2112 }
2113 JVM_END
2114
2115 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2116 {
2117 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2118 JvmtiVMObjectAllocEventCollector oam;
2119 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120 bounds_check(cp, index, CHECK_NULL);
2121 constantTag tag = cp->tag_at(index);
2122 if (!tag.is_name_and_type()) {
2123 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2124 }
2125 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2126 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2127 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2128 objArrayHandle dest(THREAD, dest_o);
2129 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2130 dest->obj_at_put(0, str());
2131 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2132 dest->obj_at_put(1, str());
2133 return (jobjectArray) JNIHandles::make_local(dest());
2134 }
2135 JVM_END
2136
2137 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2138 {
2139 JVMWrapper("JVM_ConstantPoolGetIntAt");
2140 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2141 bounds_check(cp, index, CHECK_0);
2142 constantTag tag = cp->tag_at(index);
2143 if (!tag.is_int()) {
2144 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2145 }
2146 return cp->int_at(index);
2147 }
2148 JVM_END
2149
2150 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2151 {
2152 JVMWrapper("JVM_ConstantPoolGetLongAt");
2153 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2154 bounds_check(cp, index, CHECK_(0L));
2155 constantTag tag = cp->tag_at(index);
2156 if (!tag.is_long()) {
2157 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2158 }
2159 return cp->long_at(index);
2160 }
2161 JVM_END
2162
2163 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2164 {
2165 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2166 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2167 bounds_check(cp, index, CHECK_(0.0f));
2168 constantTag tag = cp->tag_at(index);
2169 if (!tag.is_float()) {
2170 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2171 }
2172 return cp->float_at(index);
2173 }
2174 JVM_END
2175
2176 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2177 {
2178 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2179 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2180 bounds_check(cp, index, CHECK_(0.0));
2181 constantTag tag = cp->tag_at(index);
2182 if (!tag.is_double()) {
2183 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2184 }
2185 return cp->double_at(index);
2186 }
2187 JVM_END
2188
2189 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2190 {
2191 JVMWrapper("JVM_ConstantPoolGetStringAt");
2192 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2193 bounds_check(cp, index, CHECK_NULL);
2194 constantTag tag = cp->tag_at(index);
2195 if (!tag.is_string()) {
2196 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2197 }
2198 oop str = cp->string_at(index, CHECK_NULL);
2199 return (jstring) JNIHandles::make_local(str);
2200 }
2201 JVM_END
2202
2203 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2204 {
2205 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2206 JvmtiVMObjectAllocEventCollector oam;
2207 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2208 bounds_check(cp, index, CHECK_NULL);
2209 constantTag tag = cp->tag_at(index);
2210 if (!tag.is_symbol()) {
2211 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2212 }
2213 Symbol* sym = cp->symbol_at(index);
2214 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2215 return (jstring) JNIHandles::make_local(str());
2216 }
2217 JVM_END
2218
2219 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2220 {
2221 JVMWrapper("JVM_ConstantPoolGetTagAt");
2222 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2223 bounds_check(cp, index, CHECK_0);
2224 constantTag tag = cp->tag_at(index);
2225 jbyte result = tag.value();
2226 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2227 // they are changed to the corresponding tags from the JVM spec, so that java code in
2228 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2229 if (tag.is_klass_or_reference()) {
2230 result = JVM_CONSTANT_Class;
2231 } else if (tag.is_string_index()) {
2232 result = JVM_CONSTANT_String;
2233 } else if (tag.is_method_type_in_error()) {
2234 result = JVM_CONSTANT_MethodType;
2235 } else if (tag.is_method_handle_in_error()) {
2236 result = JVM_CONSTANT_MethodHandle;
2237 }
2238 return result;
2239 }
2240 JVM_END
2241
2242 // Assertion support. //////////////////////////////////////////////////////////
2243
2244 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2245 JVMWrapper("JVM_DesiredAssertionStatus");
2246 assert(cls != NULL, "bad class");
2247
2248 oop r = JNIHandles::resolve(cls);
2249 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2250 if (java_lang_Class::is_primitive(r)) return false;
2251
2252 Klass* k = java_lang_Class::as_Klass(r);
2253 assert(k->is_instance_klass(), "must be an instance klass");
2254 if (!k->is_instance_klass()) return false;
2255
2256 ResourceMark rm(THREAD);
2257 const char* name = k->name()->as_C_string();
2258 bool system_class = k->class_loader() == NULL;
2259 return JavaAssertions::enabled(name, system_class);
2260
2261 JVM_END
2262
2263
2264 // Return a new AssertionStatusDirectives object with the fields filled in with
2265 // command-line assertion arguments (i.e., -ea, -da).
2266 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2267 JVMWrapper("JVM_AssertionStatusDirectives");
2268 JvmtiVMObjectAllocEventCollector oam;
2269 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2270 return JNIHandles::make_local(env, asd);
2271 JVM_END
2272
2273 // Verification ////////////////////////////////////////////////////////////////////////////////
2274
2275 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2276
2277 // RedefineClasses support: bug 6214132 caused verification to fail.
2278 // All functions from this section should call the jvmtiThreadSate function:
2279 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2280 // The function returns a Klass* of the _scratch_class if the verifier
2281 // was invoked in the middle of the class redefinition.
2282 // Otherwise it returns its argument value which is the _the_class Klass*.
2283 // Please, refer to the description in the jvmtiThreadSate.hpp.
2284
2285 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2286 JVMWrapper("JVM_GetClassNameUTF");
2287 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2289 return k->name()->as_utf8();
2290 JVM_END
2291
2292
2293 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2294 JVMWrapper("JVM_GetClassCPTypes");
2295 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2296 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2297 // types will have length zero if this is not an InstanceKlass
2298 // (length is determined by call to JVM_GetClassCPEntriesCount)
2299 if (k->is_instance_klass()) {
2300 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2301 for (int index = cp->length() - 1; index >= 0; index--) {
2302 constantTag tag = cp->tag_at(index);
2303 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2304 }
2305 }
2306 JVM_END
2307
2308
2309 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2310 JVMWrapper("JVM_GetClassCPEntriesCount");
2311 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2312 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2313 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2314 JVM_END
2315
2316
2317 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2318 JVMWrapper("JVM_GetClassFieldsCount");
2319 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2322 JVM_END
2323
2324
2325 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2326 JVMWrapper("JVM_GetClassMethodsCount");
2327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2330 JVM_END
2331
2332
2333 // The following methods, used for the verifier, are never called with
2334 // array klasses, so a direct cast to InstanceKlass is safe.
2335 // Typically, these methods are called in a loop with bounds determined
2336 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2337 // zero for arrays.
2338 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2339 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2340 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2341 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2342 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2343 int length = method->checked_exceptions_length();
2344 if (length > 0) {
2345 CheckedExceptionElement* table= method->checked_exceptions_start();
2346 for (int i = 0; i < length; i++) {
2347 exceptions[i] = table[i].class_cp_index;
2348 }
2349 }
2350 JVM_END
2351
2352
2353 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2354 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2355 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2356 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2357 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2358 return method->checked_exceptions_length();
2359 JVM_END
2360
2361
2362 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2363 JVMWrapper("JVM_GetMethodIxByteCode");
2364 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2365 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2366 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2367 memcpy(code, method->code_base(), method->code_size());
2368 JVM_END
2369
2370
2371 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2372 JVMWrapper("JVM_GetMethodIxByteCodeLength");
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->code_size();
2377 JVM_END
2378
2379
2380 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2381 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
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 ExceptionTable extable(method);
2386 entry->start_pc = extable.start_pc(entry_index);
2387 entry->end_pc = extable.end_pc(entry_index);
2388 entry->handler_pc = extable.handler_pc(entry_index);
2389 entry->catchType = extable.catch_type_index(entry_index);
2390 JVM_END
2391
2392
2393 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2394 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2395 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2396 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2397 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2398 return method->exception_table_length();
2399 JVM_END
2400
2401
2402 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2403 JVMWrapper("JVM_GetMethodIxModifiers");
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2407 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2408 JVM_END
2409
2410
2411 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2412 JVMWrapper("JVM_GetFieldIxModifiers");
2413 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2414 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2415 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2416 JVM_END
2417
2418
2419 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2420 JVMWrapper("JVM_GetMethodIxLocalsCount");
2421 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2422 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2423 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2424 return method->max_locals();
2425 JVM_END
2426
2427
2428 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2429 JVMWrapper("JVM_GetMethodIxArgsSize");
2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2433 return method->size_of_parameters();
2434 JVM_END
2435
2436
2437 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2438 JVMWrapper("JVM_GetMethodIxMaxStack");
2439 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2440 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2441 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2442 return method->verifier_max_stack();
2443 JVM_END
2444
2445
2446 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2447 JVMWrapper("JVM_IsConstructorIx");
2448 ResourceMark rm(THREAD);
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2452 return method->name() == vmSymbols::object_initializer_name();
2453 JVM_END
2454
2455
2456 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2457 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2458 ResourceMark rm(THREAD);
2459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2462 return method->is_overpass();
2463 JVM_END
2464
2465 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2466 JVMWrapper("JVM_GetMethodIxIxUTF");
2467 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2468 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2469 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2470 return method->name()->as_utf8();
2471 JVM_END
2472
2473
2474 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2475 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2476 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2477 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2478 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2479 return method->signature()->as_utf8();
2480 JVM_END
2481
2482 /**
2483 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2484 * read entries in the constant pool. Since the old verifier always
2485 * works on a copy of the code, it will not see any rewriting that
2486 * may possibly occur in the middle of verification. So it is important
2487 * that nothing it calls tries to use the cpCache instead of the raw
2488 * constant pool, so we must use cp->uncached_x methods when appropriate.
2489 */
2490 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2491 JVMWrapper("JVM_GetCPFieldNameUTF");
2492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2493 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2494 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2495 switch (cp->tag_at(cp_index).value()) {
2496 case JVM_CONSTANT_Fieldref:
2497 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2498 default:
2499 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2500 }
2501 ShouldNotReachHere();
2502 return NULL;
2503 JVM_END
2504
2505
2506 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2507 JVMWrapper("JVM_GetCPMethodNameUTF");
2508 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2509 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2510 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2511 switch (cp->tag_at(cp_index).value()) {
2512 case JVM_CONSTANT_InterfaceMethodref:
2513 case JVM_CONSTANT_Methodref:
2514 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2515 default:
2516 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2517 }
2518 ShouldNotReachHere();
2519 return NULL;
2520 JVM_END
2521
2522
2523 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2524 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2527 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2528 switch (cp->tag_at(cp_index).value()) {
2529 case JVM_CONSTANT_InterfaceMethodref:
2530 case JVM_CONSTANT_Methodref:
2531 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2532 default:
2533 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2534 }
2535 ShouldNotReachHere();
2536 return NULL;
2537 JVM_END
2538
2539
2540 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2541 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2542 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2543 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2544 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2545 switch (cp->tag_at(cp_index).value()) {
2546 case JVM_CONSTANT_Fieldref:
2547 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2548 default:
2549 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2550 }
2551 ShouldNotReachHere();
2552 return NULL;
2553 JVM_END
2554
2555
2556 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2557 JVMWrapper("JVM_GetCPClassNameUTF");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2561 Symbol* classname = cp->klass_name_at(cp_index);
2562 return classname->as_utf8();
2563 JVM_END
2564
2565
2566 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2567 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2568 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2569 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2570 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2571 switch (cp->tag_at(cp_index).value()) {
2572 case JVM_CONSTANT_Fieldref: {
2573 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2574 Symbol* classname = cp->klass_name_at(class_index);
2575 return classname->as_utf8();
2576 }
2577 default:
2578 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2579 }
2580 ShouldNotReachHere();
2581 return NULL;
2582 JVM_END
2583
2584
2585 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2586 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2587 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2588 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2589 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2590 switch (cp->tag_at(cp_index).value()) {
2591 case JVM_CONSTANT_Methodref:
2592 case JVM_CONSTANT_InterfaceMethodref: {
2593 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2594 Symbol* classname = cp->klass_name_at(class_index);
2595 return classname->as_utf8();
2596 }
2597 default:
2598 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2599 }
2600 ShouldNotReachHere();
2601 return NULL;
2602 JVM_END
2603
2604
2605 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2606 JVMWrapper("JVM_GetCPFieldModifiers");
2607 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2608 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2609 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2610 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2611 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2612 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2613 switch (cp->tag_at(cp_index).value()) {
2614 case JVM_CONSTANT_Fieldref: {
2615 Symbol* name = cp->uncached_name_ref_at(cp_index);
2616 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2617 InstanceKlass* ik = InstanceKlass::cast(k_called);
2618 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2619 if (fs.name() == name && fs.signature() == signature) {
2620 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2621 }
2622 }
2623 return -1;
2624 }
2625 default:
2626 fatal("JVM_GetCPFieldModifiers: illegal constant");
2627 }
2628 ShouldNotReachHere();
2629 return 0;
2630 JVM_END
2631
2632
2633 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2634 JVMWrapper("JVM_GetCPMethodModifiers");
2635 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2636 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2637 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2638 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2639 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2640 switch (cp->tag_at(cp_index).value()) {
2641 case JVM_CONSTANT_Methodref:
2642 case JVM_CONSTANT_InterfaceMethodref: {
2643 Symbol* name = cp->uncached_name_ref_at(cp_index);
2644 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2645 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2646 int methods_count = methods->length();
2647 for (int i = 0; i < methods_count; i++) {
2648 Method* method = methods->at(i);
2649 if (method->name() == name && method->signature() == signature) {
2650 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2651 }
2652 }
2653 return -1;
2654 }
2655 default:
2656 fatal("JVM_GetCPMethodModifiers: illegal constant");
2657 }
2658 ShouldNotReachHere();
2659 return 0;
2660 JVM_END
2661
2662
2663 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2664
2665 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2666 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2667 JVM_END
2668
2669
2670 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2671 JVMWrapper("JVM_IsSameClassPackage");
2672 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2673 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2674 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2675 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2676 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2677 JVM_END
2678
2679 // Printing support //////////////////////////////////////////////////
2680 extern "C" {
2681
2682 ATTRIBUTE_PRINTF(3, 0)
2683 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2684 // see bug 4399518, 4417214
2685 if ((intptr_t)count <= 0) return -1;
2686
2687 int result = vsnprintf(str, count, fmt, args);
2688 // Note: on truncation vsnprintf(3) on Unix returns numbers of
2689 // characters which would have been written had the buffer been large
2690 // enough; on Windows, it returns -1. We handle both cases here and
2691 // always return -1, and perform null termination.
2692 if ((result > 0 && (size_t)result >= count) || result == -1) {
2693 str[count - 1] = '\0';
2694 result = -1;
2695 }
2696
2697 return result;
2698 }
2699
2700 ATTRIBUTE_PRINTF(3, 0)
2701 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2702 va_list args;
2703 int len;
2704 va_start(args, fmt);
2705 len = jio_vsnprintf(str, count, fmt, args);
2706 va_end(args);
2707 return len;
2708 }
2709
2710 ATTRIBUTE_PRINTF(2,3)
2711 int jio_fprintf(FILE* f, const char *fmt, ...) {
2712 int len;
2713 va_list args;
2714 va_start(args, fmt);
2715 len = jio_vfprintf(f, fmt, args);
2716 va_end(args);
2717 return len;
2718 }
2719
2720 ATTRIBUTE_PRINTF(2, 0)
2721 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2722 if (Arguments::vfprintf_hook() != NULL) {
2723 return Arguments::vfprintf_hook()(f, fmt, args);
2724 } else {
2725 return vfprintf(f, fmt, args);
2726 }
2727 }
2728
2729 ATTRIBUTE_PRINTF(1, 2)
2730 JNIEXPORT int jio_printf(const char *fmt, ...) {
2731 int len;
2732 va_list args;
2733 va_start(args, fmt);
2734 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2735 va_end(args);
2736 return len;
2737 }
2738
2739
2740 // HotSpot specific jio method
2741 void jio_print(const char* s) {
2742 // Try to make this function as atomic as possible.
2743 if (Arguments::vfprintf_hook() != NULL) {
2744 jio_fprintf(defaultStream::output_stream(), "%s", s);
2745 } else {
2746 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2747 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2748 }
2749 }
2750
2751 } // Extern C
2752
2753 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2754
2755 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2756 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2757 // OSThread objects. The exception to this rule is when the target object is the thread
2758 // doing the operation, in which case we know that the thread won't exit until the
2759 // operation is done (all exits being voluntary). There are a few cases where it is
2760 // rather silly to do operations on yourself, like resuming yourself or asking whether
2761 // you are alive. While these can still happen, they are not subject to deadlocks if
2762 // the lock is held while the operation occurs (this is not the case for suspend, for
2763 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2764 // implementation is local to this file, we always lock Threads_lock for that one.
2765
2766 static void thread_entry(JavaThread* thread, TRAPS) {
2767 HandleMark hm(THREAD);
2768 Handle obj(THREAD, thread->threadObj());
2769 JavaValue result(T_VOID);
2770 JavaCalls::call_virtual(&result,
2771 obj,
2772 SystemDictionary::Thread_klass(),
2773 vmSymbols::run_method_name(),
2774 vmSymbols::void_method_signature(),
2775 THREAD);
2776 }
2777
2778
2779 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2780 JVMWrapper("JVM_StartThread");
2781 JavaThread *native_thread = NULL;
2782
2783 // We cannot hold the Threads_lock when we throw an exception,
2784 // due to rank ordering issues. Example: we might need to grab the
2785 // Heap_lock while we construct the exception.
2786 bool throw_illegal_thread_state = false;
2787
2788 // We must release the Threads_lock before we can post a jvmti event
2789 // in Thread::start.
2790 {
2791 // Ensure that the C++ Thread and OSThread structures aren't freed before
2792 // we operate.
2793 MutexLocker mu(Threads_lock);
2794
2795 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2796 // re-starting an already started thread, so we should usually find
2797 // that the JavaThread is null. However for a JNI attached thread
2798 // there is a small window between the Thread object being created
2799 // (with its JavaThread set) and the update to its threadStatus, so we
2800 // have to check for this
2801 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2802 throw_illegal_thread_state = true;
2803 } else {
2804 // We could also check the stillborn flag to see if this thread was already stopped, but
2805 // for historical reasons we let the thread detect that itself when it starts running
2806
2807 jlong size =
2808 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2809 // Allocate the C++ Thread structure and create the native thread. The
2810 // stack size retrieved from java is 64-bit signed, but the constructor takes
2811 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2812 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2813 // - Avoid passing negative values which would result in really large stacks.
2814 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2815 size_t sz = size > 0 ? (size_t) size : 0;
2816 native_thread = new JavaThread(&thread_entry, sz);
2817
2818 // At this point it may be possible that no osthread was created for the
2819 // JavaThread due to lack of memory. Check for this situation and throw
2820 // an exception if necessary. Eventually we may want to change this so
2821 // that we only grab the lock if the thread was created successfully -
2822 // then we can also do this check and throw the exception in the
2823 // JavaThread constructor.
2824 if (native_thread->osthread() != NULL) {
2825 // Note: the current thread is not being used within "prepare".
2826 native_thread->prepare(jthread);
2827 }
2828 }
2829 }
2830
2831 if (throw_illegal_thread_state) {
2832 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2833 }
2834
2835 assert(native_thread != NULL, "Starting null thread?");
2836
2837 if (native_thread->osthread() == NULL) {
2838 // No one should hold a reference to the 'native_thread'.
2839 delete native_thread;
2840 if (JvmtiExport::should_post_resource_exhausted()) {
2841 JvmtiExport::post_resource_exhausted(
2842 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2843 os::native_thread_creation_failed_msg());
2844 }
2845 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2846 os::native_thread_creation_failed_msg());
2847 }
2848
2849 Thread::start(native_thread);
2850
2851 JVM_END
2852
2853 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2854 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2855 // but is thought to be reliable and simple. In the case, where the receiver is the
2856 // same thread as the sender, no safepoint is needed.
2857 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2858 JVMWrapper("JVM_StopThread");
2859
2860 oop java_throwable = JNIHandles::resolve(throwable);
2861 if (java_throwable == NULL) {
2862 THROW(vmSymbols::java_lang_NullPointerException());
2863 }
2864 oop java_thread = JNIHandles::resolve_non_null(jthread);
2865 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2866 Events::log_exception(JavaThread::current(),
2867 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2868 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2869 // First check if thread is alive
2870 if (receiver != NULL) {
2871 // Check if exception is getting thrown at self (use oop equality, since the
2872 // target object might exit)
2873 if (java_thread == thread->threadObj()) {
2874 THROW_OOP(java_throwable);
2875 } else {
2876 // Enques a VM_Operation to stop all threads and then deliver the exception...
2877 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2878 }
2879 }
2880 else {
2881 // Either:
2882 // - target thread has not been started before being stopped, or
2883 // - target thread already terminated
2884 // We could read the threadStatus to determine which case it is
2885 // but that is overkill as it doesn't matter. We must set the
2886 // stillborn flag for the first case, and if the thread has already
2887 // exited setting this flag has no affect
2888 java_lang_Thread::set_stillborn(java_thread);
2889 }
2890 JVM_END
2891
2892
2893 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2894 JVMWrapper("JVM_IsThreadAlive");
2895
2896 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2897 return java_lang_Thread::is_alive(thread_oop);
2898 JVM_END
2899
2900
2901 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2902 JVMWrapper("JVM_SuspendThread");
2903 oop java_thread = JNIHandles::resolve_non_null(jthread);
2904 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2905
2906 if (receiver != NULL) {
2907 // thread has run and has not exited (still on threads list)
2908
2909 {
2910 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2911 if (receiver->is_external_suspend()) {
2912 // Don't allow nested external suspend requests. We can't return
2913 // an error from this interface so just ignore the problem.
2914 return;
2915 }
2916 if (receiver->is_exiting()) { // thread is in the process of exiting
2917 return;
2918 }
2919 receiver->set_external_suspend();
2920 }
2921
2922 // java_suspend() will catch threads in the process of exiting
2923 // and will ignore them.
2924 receiver->java_suspend();
2925
2926 // It would be nice to have the following assertion in all the
2927 // time, but it is possible for a racing resume request to have
2928 // resumed this thread right after we suspended it. Temporarily
2929 // enable this assertion if you are chasing a different kind of
2930 // bug.
2931 //
2932 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2933 // receiver->is_being_ext_suspended(), "thread is not suspended");
2934 }
2935 JVM_END
2936
2937
2938 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2939 JVMWrapper("JVM_ResumeThread");
2940 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2941 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2942 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2943 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2944 // looks at it.
2945 MutexLocker ml(Threads_lock);
2946 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2947 if (thr != NULL) {
2948 // the thread has run and is not in the process of exiting
2949 thr->java_resume();
2950 }
2951 JVM_END
2952
2953
2954 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2955 JVMWrapper("JVM_SetThreadPriority");
2956 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2957 MutexLocker ml(Threads_lock);
2958 oop java_thread = JNIHandles::resolve_non_null(jthread);
2959 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2960 JavaThread* thr = java_lang_Thread::thread(java_thread);
2961 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2962 Thread::set_priority(thr, (ThreadPriority)prio);
2963 }
2964 JVM_END
2965
2966
2967 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2968 JVMWrapper("JVM_Yield");
2969 if (os::dont_yield()) return;
2970 HOTSPOT_THREAD_YIELD();
2971 os::naked_yield();
2972 JVM_END
2973
2974 #if INCLUDE_TRACE
2975 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2976 assert(event != NULL, "invariant");
2977 if (event->should_commit()) {
2978 event->set_time(millis);
2979 event->commit();
2980 }
2981 }
2982 #endif
2983
2984 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2985 JVMWrapper("JVM_Sleep");
2986
2987 if (millis < 0) {
2988 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2989 }
2990
2991 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2992 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2993 }
2994
2995 // Save current thread state and restore it at the end of this block.
2996 // And set new thread state to SLEEPING.
2997 JavaThreadSleepState jtss(thread);
2998
2999 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3000 TRACE_ONLY(EventThreadSleep event;)
3001
3002 if (millis == 0) {
3003 os::naked_yield();
3004 } else {
3005 ThreadState old_state = thread->osthread()->get_state();
3006 thread->osthread()->set_state(SLEEPING);
3007 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3008 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3009 // us while we were sleeping. We do not overwrite those.
3010 if (!HAS_PENDING_EXCEPTION) {
3011 TRACE_ONLY(post_thread_sleep_event(&event, millis);)
3012 HOTSPOT_THREAD_SLEEP_END(1);
3013
3014 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3015 // to properly restore the thread state. That's likely wrong.
3016 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3017 }
3018 }
3019 thread->osthread()->set_state(old_state);
3020 }
3021 TRACE_ONLY(post_thread_sleep_event(&event, millis);)
3022 HOTSPOT_THREAD_SLEEP_END(0);
3023 JVM_END
3024
3025 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3026 JVMWrapper("JVM_CurrentThread");
3027 oop jthread = thread->threadObj();
3028 assert (thread != NULL, "no current thread!");
3029 return JNIHandles::make_local(env, jthread);
3030 JVM_END
3031
3032
3033 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3034 JVMWrapper("JVM_CountStackFrames");
3035
3036 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3037 oop java_thread = JNIHandles::resolve_non_null(jthread);
3038 bool throw_illegal_thread_state = false;
3039 int count = 0;
3040
3041 {
3042 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3043 // We need to re-resolve the java_thread, since a GC might have happened during the
3044 // acquire of the lock
3045 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3046
3047 if (thr == NULL) {
3048 // do nothing
3049 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3050 // Check whether this java thread has been suspended already. If not, throws
3051 // IllegalThreadStateException. We defer to throw that exception until
3052 // Threads_lock is released since loading exception class has to leave VM.
3053 // The correct way to test a thread is actually suspended is
3054 // wait_for_ext_suspend_completion(), but we can't call that while holding
3055 // the Threads_lock. The above tests are sufficient for our purposes
3056 // provided the walkability of the stack is stable - which it isn't
3057 // 100% but close enough for most practical purposes.
3058 throw_illegal_thread_state = true;
3059 } else {
3060 // Count all java activation, i.e., number of vframes
3061 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3062 // Native frames are not counted
3063 if (!vfst.method()->is_native()) count++;
3064 }
3065 }
3066 }
3067
3068 if (throw_illegal_thread_state) {
3069 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3070 "this thread is not suspended");
3071 }
3072 return count;
3073 JVM_END
3074
3075 // Consider: A better way to implement JVM_Interrupt() is to acquire
3076 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3077 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3078 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3079 // outside the critical section. Threads_lock is hot so we want to minimize
3080 // the hold-time. A cleaner interface would be to decompose interrupt into
3081 // two steps. The 1st phase, performed under Threads_lock, would return
3082 // a closure that'd be invoked after Threads_lock was dropped.
3083 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3084 // admit spurious wakeups.
3085
3086 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3087 JVMWrapper("JVM_Interrupt");
3088
3089 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3090 oop java_thread = JNIHandles::resolve_non_null(jthread);
3091 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3092 // We need to re-resolve the java_thread, since a GC might have happened during the
3093 // acquire of the lock
3094 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3095 if (thr != NULL) {
3096 Thread::interrupt(thr);
3097 }
3098 JVM_END
3099
3100
3101 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3102 JVMWrapper("JVM_IsInterrupted");
3103
3104 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3105 oop java_thread = JNIHandles::resolve_non_null(jthread);
3106 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3107 // We need to re-resolve the java_thread, since a GC might have happened during the
3108 // acquire of the lock
3109 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3110 if (thr == NULL) {
3111 return JNI_FALSE;
3112 } else {
3113 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3114 }
3115 JVM_END
3116
3117
3118 // Return true iff the current thread has locked the object passed in
3119
3120 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3121 JVMWrapper("JVM_HoldsLock");
3122 assert(THREAD->is_Java_thread(), "sanity check");
3123 if (obj == NULL) {
3124 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3125 }
3126 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3127 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3128 JVM_END
3129
3130
3131 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3132 JVMWrapper("JVM_DumpAllStacks");
3133 VM_PrintThreads op;
3134 VMThread::execute(&op);
3135 if (JvmtiExport::should_post_data_dump()) {
3136 JvmtiExport::post_data_dump();
3137 }
3138 JVM_END
3139
3140 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3141 JVMWrapper("JVM_SetNativeThreadName");
3142 ResourceMark rm(THREAD);
3143 oop java_thread = JNIHandles::resolve_non_null(jthread);
3144 JavaThread* thr = java_lang_Thread::thread(java_thread);
3145 // Thread naming only supported for the current thread, doesn't work for
3146 // target threads.
3147 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3148 // we don't set the name of an attached thread to avoid stepping
3149 // on other programs
3150 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3151 os::set_native_thread_name(thread_name);
3152 }
3153 JVM_END
3154
3155 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3156
3157 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3158 assert(jthread->is_Java_thread(), "must be a Java thread");
3159 if (jthread->privileged_stack_top() == NULL) return false;
3160 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3161 oop loader = jthread->privileged_stack_top()->class_loader();
3162 if (loader == NULL) return true;
3163 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3164 if (trusted) return true;
3165 }
3166 return false;
3167 }
3168
3169 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3170 JVMWrapper("JVM_CurrentLoadedClass");
3171 ResourceMark rm(THREAD);
3172
3173 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3174 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3175 bool trusted = is_trusted_frame(thread, &vfst);
3176 if (trusted) return NULL;
3177
3178 Method* m = vfst.method();
3179 if (!m->is_native()) {
3180 InstanceKlass* holder = m->method_holder();
3181 oop loader = holder->class_loader();
3182 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3183 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3184 }
3185 }
3186 }
3187 return NULL;
3188 JVM_END
3189
3190
3191 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3192 JVMWrapper("JVM_CurrentClassLoader");
3193 ResourceMark rm(THREAD);
3194
3195 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3196
3197 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3198 bool trusted = is_trusted_frame(thread, &vfst);
3199 if (trusted) return NULL;
3200
3201 Method* m = vfst.method();
3202 if (!m->is_native()) {
3203 InstanceKlass* holder = m->method_holder();
3204 assert(holder->is_klass(), "just checking");
3205 oop loader = holder->class_loader();
3206 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3207 return JNIHandles::make_local(env, loader);
3208 }
3209 }
3210 }
3211 return NULL;
3212 JVM_END
3213
3214
3215 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3216 JVMWrapper("JVM_GetClassContext");
3217 ResourceMark rm(THREAD);
3218 JvmtiVMObjectAllocEventCollector oam;
3219 vframeStream vfst(thread);
3220
3221 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3222 // This must only be called from SecurityManager.getClassContext
3223 Method* m = vfst.method();
3224 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3225 m->name() == vmSymbols::getClassContext_name() &&
3226 m->signature() == vmSymbols::void_class_array_signature())) {
3227 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3228 }
3229 }
3230
3231 // Collect method holders
3232 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3233 for (; !vfst.at_end(); vfst.security_next()) {
3234 Method* m = vfst.method();
3235 // Native frames are not returned
3236 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3237 Klass* holder = m->method_holder();
3238 assert(holder->is_klass(), "just checking");
3239 klass_array->append(holder);
3240 }
3241 }
3242
3243 // Create result array of type [Ljava/lang/Class;
3244 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3245 // Fill in mirrors corresponding to method holders
3246 for (int i = 0; i < klass_array->length(); i++) {
3247 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3248 }
3249
3250 return (jobjectArray) JNIHandles::make_local(env, result);
3251 JVM_END
3252
3253
3254 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3255 JVMWrapper("JVM_ClassDepth");
3256 ResourceMark rm(THREAD);
3257 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3258 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3259
3260 const char* str = java_lang_String::as_utf8_string(class_name_str());
3261 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3262 if (class_name_sym == NULL) {
3263 return -1;
3264 }
3265
3266 int depth = 0;
3267
3268 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3269 if (!vfst.method()->is_native()) {
3270 InstanceKlass* holder = vfst.method()->method_holder();
3271 assert(holder->is_klass(), "just checking");
3272 if (holder->name() == class_name_sym) {
3273 return depth;
3274 }
3275 depth++;
3276 }
3277 }
3278 return -1;
3279 JVM_END
3280
3281
3282 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3283 JVMWrapper("JVM_ClassLoaderDepth");
3284 ResourceMark rm(THREAD);
3285 int depth = 0;
3286 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3287 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3288 bool trusted = is_trusted_frame(thread, &vfst);
3289 if (trusted) return -1;
3290
3291 Method* m = vfst.method();
3292 if (!m->is_native()) {
3293 InstanceKlass* holder = m->method_holder();
3294 assert(holder->is_klass(), "just checking");
3295 oop loader = holder->class_loader();
3296 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3297 return depth;
3298 }
3299 depth++;
3300 }
3301 }
3302 return -1;
3303 JVM_END
3304
3305
3306 // java.lang.Package ////////////////////////////////////////////////////////////////
3307
3308
3309 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3310 JVMWrapper("JVM_GetSystemPackage");
3311 ResourceMark rm(THREAD);
3312 JvmtiVMObjectAllocEventCollector oam;
3313 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3314 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3315 return (jstring) JNIHandles::make_local(result);
3316 JVM_END
3317
3318
3319 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3320 JVMWrapper("JVM_GetSystemPackages");
3321 JvmtiVMObjectAllocEventCollector oam;
3322 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3323 return (jobjectArray) JNIHandles::make_local(result);
3324 JVM_END
3325
3326
3327 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3328
3329
3330 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3331 JVMWrapper("JVM_GetAndClearReferencePendingList");
3332
3333 MonitorLockerEx ml(Heap_lock);
3334 oop ref = Universe::reference_pending_list();
3335 if (ref != NULL) {
3336 Universe::set_reference_pending_list(NULL);
3337 }
3338 return JNIHandles::make_local(env, ref);
3339 JVM_END
3340
3341 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3342 JVMWrapper("JVM_HasReferencePendingList");
3343 MonitorLockerEx ml(Heap_lock);
3344 return Universe::has_reference_pending_list();
3345 JVM_END
3346
3347 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3348 JVMWrapper("JVM_WaitForReferencePendingList");
3349 MonitorLockerEx ml(Heap_lock);
3350 while (!Universe::has_reference_pending_list()) {
3351 ml.wait();
3352 }
3353 JVM_END
3354
3355
3356 // ObjectInputStream ///////////////////////////////////////////////////////////////
3357
3358 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3359 if (current_class == NULL) {
3360 return true;
3361 }
3362 if ((current_class == field_class) || access.is_public()) {
3363 return true;
3364 }
3365
3366 if (access.is_protected()) {
3367 // See if current_class is a subclass of field_class
3368 if (current_class->is_subclass_of(field_class)) {
3369 return true;
3370 }
3371 }
3372
3373 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3374 }
3375
3376 // Return the first user-defined class loader up the execution stack, or null
3377 // if only code from the bootstrap or platform class loader is on the stack.
3378
3379 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3380 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3381 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3382 oop loader = vfst.method()->method_holder()->class_loader();
3383 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3384 return JNIHandles::make_local(env, loader);
3385 }
3386 }
3387 return NULL;
3388 JVM_END
3389
3390
3391 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3392
3393
3394 // resolve array handle and check arguments
3395 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3396 if (arr == NULL) {
3397 THROW_0(vmSymbols::java_lang_NullPointerException());
3398 }
3399 oop a = JNIHandles::resolve_non_null(arr);
3400 if (!a->is_array()) {
3401 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3402 } else if (type_array_only && !a->is_typeArray()) {
3403 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3404 }
3405 return arrayOop(a);
3406 }
3407
3408
3409 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3410 JVMWrapper("JVM_GetArrayLength");
3411 arrayOop a = check_array(env, arr, false, CHECK_0);
3412 return a->length();
3413 JVM_END
3414
3415
3416 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3417 JVMWrapper("JVM_Array_Get");
3418 JvmtiVMObjectAllocEventCollector oam;
3419 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3420 jvalue value;
3421 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3422 oop box = Reflection::box(&value, type, CHECK_NULL);
3423 return JNIHandles::make_local(env, box);
3424 JVM_END
3425
3426
3427 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3428 JVMWrapper("JVM_GetPrimitiveArrayElement");
3429 jvalue value;
3430 value.i = 0; // to initialize value before getting used in CHECK
3431 arrayOop a = check_array(env, arr, true, CHECK_(value));
3432 assert(a->is_typeArray(), "just checking");
3433 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3434 BasicType wide_type = (BasicType) wCode;
3435 if (type != wide_type) {
3436 Reflection::widen(&value, type, wide_type, CHECK_(value));
3437 }
3438 return value;
3439 JVM_END
3440
3441
3442 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3443 JVMWrapper("JVM_SetArrayElement");
3444 arrayOop a = check_array(env, arr, false, CHECK);
3445 oop box = JNIHandles::resolve(val);
3446 jvalue value;
3447 value.i = 0; // to initialize value before getting used in CHECK
3448 BasicType value_type;
3449 if (a->is_objArray()) {
3450 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3451 value_type = Reflection::unbox_for_regular_object(box, &value);
3452 } else {
3453 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3454 }
3455 Reflection::array_set(&value, a, index, value_type, CHECK);
3456 JVM_END
3457
3458
3459 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3460 JVMWrapper("JVM_SetPrimitiveArrayElement");
3461 arrayOop a = check_array(env, arr, true, CHECK);
3462 assert(a->is_typeArray(), "just checking");
3463 BasicType value_type = (BasicType) vCode;
3464 Reflection::array_set(&v, a, index, value_type, CHECK);
3465 JVM_END
3466
3467
3468 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3469 JVMWrapper("JVM_NewArray");
3470 JvmtiVMObjectAllocEventCollector oam;
3471 oop element_mirror = JNIHandles::resolve(eltClass);
3472 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3473 return JNIHandles::make_local(env, result);
3474 JVM_END
3475
3476
3477 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3478 JVMWrapper("JVM_NewMultiArray");
3479 JvmtiVMObjectAllocEventCollector oam;
3480 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3481 oop element_mirror = JNIHandles::resolve(eltClass);
3482 assert(dim_array->is_typeArray(), "just checking");
3483 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3484 return JNIHandles::make_local(env, result);
3485 JVM_END
3486
3487
3488 // Library support ///////////////////////////////////////////////////////////////////////////
3489
3490 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3491 //%note jvm_ct
3492 JVMWrapper("JVM_LoadLibrary");
3493 char ebuf[1024];
3494 void *load_result;
3495 {
3496 ThreadToNativeFromVM ttnfvm(thread);
3497 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3498 }
3499 if (load_result == NULL) {
3500 char msg[1024];
3501 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3502 // Since 'ebuf' may contain a string encoded using
3503 // platform encoding scheme, we need to pass
3504 // Exceptions::unsafe_to_utf8 to the new_exception method
3505 // as the last argument. See bug 6367357.
3506 Handle h_exception =
3507 Exceptions::new_exception(thread,
3508 vmSymbols::java_lang_UnsatisfiedLinkError(),
3509 msg, Exceptions::unsafe_to_utf8);
3510
3511 THROW_HANDLE_0(h_exception);
3512 }
3513 return load_result;
3514 JVM_END
3515
3516
3517 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3518 JVMWrapper("JVM_UnloadLibrary");
3519 os::dll_unload(handle);
3520 JVM_END
3521
3522
3523 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3524 JVMWrapper("JVM_FindLibraryEntry");
3525 return os::dll_lookup(handle, name);
3526 JVM_END
3527
3528
3529 // JNI version ///////////////////////////////////////////////////////////////////////////////
3530
3531 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3532 JVMWrapper("JVM_IsSupportedJNIVersion");
3533 return Threads::is_supported_jni_version_including_1_1(version);
3534 JVM_END
3535
3536
3537 // String support ///////////////////////////////////////////////////////////////////////////
3538
3539 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3540 JVMWrapper("JVM_InternString");
3541 JvmtiVMObjectAllocEventCollector oam;
3542 if (str == NULL) return NULL;
3543 oop string = JNIHandles::resolve_non_null(str);
3544 oop result = StringTable::intern(string, CHECK_NULL);
3545 return (jstring) JNIHandles::make_local(env, result);
3546 JVM_END
3547
3548
3549 // Raw monitor support //////////////////////////////////////////////////////////////////////
3550
3551 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3552 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3553 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3554 // that only works with java threads.
3555
3556
3557 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3558 VM_Exit::block_if_vm_exited();
3559 JVMWrapper("JVM_RawMonitorCreate");
3560 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3561 }
3562
3563
3564 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3565 VM_Exit::block_if_vm_exited();
3566 JVMWrapper("JVM_RawMonitorDestroy");
3567 delete ((Mutex*) mon);
3568 }
3569
3570
3571 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3572 VM_Exit::block_if_vm_exited();
3573 JVMWrapper("JVM_RawMonitorEnter");
3574 ((Mutex*) mon)->jvm_raw_lock();
3575 return 0;
3576 }
3577
3578
3579 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3580 VM_Exit::block_if_vm_exited();
3581 JVMWrapper("JVM_RawMonitorExit");
3582 ((Mutex*) mon)->jvm_raw_unlock();
3583 }
3584
3585
3586 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3587
3588 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3589 Handle loader, Handle protection_domain,
3590 jboolean throwError, TRAPS) {
3591 // Security Note:
3592 // The Java level wrapper will perform the necessary security check allowing
3593 // us to pass the NULL as the initiating class loader. The VM is responsible for
3594 // the checkPackageAccess relative to the initiating class loader via the
3595 // protection_domain. The protection_domain is passed as NULL by the java code
3596 // if there is no security manager in 3-arg Class.forName().
3597 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3598
3599 // Check if we should initialize the class
3600 if (init && klass->is_instance_klass()) {
3601 klass->initialize(CHECK_NULL);
3602 }
3603 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3604 }
3605
3606
3607 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3608
3609 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3610 JVMWrapper("JVM_InvokeMethod");
3611 Handle method_handle;
3612 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3613 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3614 Handle receiver(THREAD, JNIHandles::resolve(obj));
3615 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3616 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3617 jobject res = JNIHandles::make_local(env, result);
3618 if (JvmtiExport::should_post_vm_object_alloc()) {
3619 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3620 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3621 if (java_lang_Class::is_primitive(ret_type)) {
3622 // Only for primitive type vm allocates memory for java object.
3623 // See box() method.
3624 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3625 }
3626 }
3627 return res;
3628 } else {
3629 THROW_0(vmSymbols::java_lang_StackOverflowError());
3630 }
3631 JVM_END
3632
3633
3634 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3635 JVMWrapper("JVM_NewInstanceFromConstructor");
3636 oop constructor_mirror = JNIHandles::resolve(c);
3637 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3638 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3639 jobject res = JNIHandles::make_local(env, result);
3640 if (JvmtiExport::should_post_vm_object_alloc()) {
3641 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3642 }
3643 return res;
3644 JVM_END
3645
3646 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3647
3648 JVM_LEAF(jboolean, JVM_SupportsCX8())
3649 JVMWrapper("JVM_SupportsCX8");
3650 return VM_Version::supports_cx8();
3651 JVM_END
3652
3653 // Returns an array of all live Thread objects (VM internal JavaThreads,
3654 // jvmti agent threads, and JNI attaching threads are skipped)
3655 // See CR 6404306 regarding JNI attaching threads
3656 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3657 ResourceMark rm(THREAD);
3658 ThreadsListEnumerator tle(THREAD, false, false);
3659 JvmtiVMObjectAllocEventCollector oam;
3660
3661 int num_threads = tle.num_threads();
3662 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3663 objArrayHandle threads_ah(THREAD, r);
3664
3665 for (int i = 0; i < num_threads; i++) {
3666 Handle h = tle.get_threadObj(i);
3667 threads_ah->obj_at_put(i, h());
3668 }
3669
3670 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3671 JVM_END
3672
3673
3674 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3675 // Return StackTraceElement[][], each element is the stack trace of a thread in
3676 // the corresponding entry in the given threads array
3677 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3678 JVMWrapper("JVM_DumpThreads");
3679 JvmtiVMObjectAllocEventCollector oam;
3680
3681 // Check if threads is null
3682 if (threads == NULL) {
3683 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3684 }
3685
3686 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3687 objArrayHandle ah(THREAD, a);
3688 int num_threads = ah->length();
3689 // check if threads is non-empty array
3690 if (num_threads == 0) {
3691 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3692 }
3693
3694 // check if threads is not an array of objects of Thread class
3695 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3696 if (k != SystemDictionary::Thread_klass()) {
3697 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3698 }
3699
3700 ResourceMark rm(THREAD);
3701
3702 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3703 for (int i = 0; i < num_threads; i++) {
3704 oop thread_obj = ah->obj_at(i);
3705 instanceHandle h(THREAD, (instanceOop) thread_obj);
3706 thread_handle_array->append(h);
3707 }
3708
3709 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3710 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3711
3712 JVM_END
3713
3714 // JVM monitoring and management support
3715 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3716 return Management::get_jmm_interface(version);
3717 JVM_END
3718
3719 // com.sun.tools.attach.VirtualMachine agent properties support
3720 //
3721 // Initialize the agent properties with the properties maintained in the VM
3722 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3723 JVMWrapper("JVM_InitAgentProperties");
3724 ResourceMark rm;
3725
3726 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3727
3728 PUTPROP(props, "sun.java.command", Arguments::java_command());
3729 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3730 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3731 return properties;
3732 JVM_END
3733
3734 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3735 {
3736 JVMWrapper("JVM_GetEnclosingMethodInfo");
3737 JvmtiVMObjectAllocEventCollector oam;
3738
3739 if (ofClass == NULL) {
3740 return NULL;
3741 }
3742 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3743 // Special handling for primitive objects
3744 if (java_lang_Class::is_primitive(mirror())) {
3745 return NULL;
3746 }
3747 Klass* k = java_lang_Class::as_Klass(mirror());
3748 if (!k->is_instance_klass()) {
3749 return NULL;
3750 }
3751 InstanceKlass* ik = InstanceKlass::cast(k);
3752 int encl_method_class_idx = ik->enclosing_method_class_index();
3753 if (encl_method_class_idx == 0) {
3754 return NULL;
3755 }
3756 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3757 objArrayHandle dest(THREAD, dest_o);
3758 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3759 dest->obj_at_put(0, enc_k->java_mirror());
3760 int encl_method_method_idx = ik->enclosing_method_method_index();
3761 if (encl_method_method_idx != 0) {
3762 Symbol* sym = ik->constants()->symbol_at(
3763 extract_low_short_from_int(
3764 ik->constants()->name_and_type_at(encl_method_method_idx)));
3765 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3766 dest->obj_at_put(1, str());
3767 sym = ik->constants()->symbol_at(
3768 extract_high_short_from_int(
3769 ik->constants()->name_and_type_at(encl_method_method_idx)));
3770 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3771 dest->obj_at_put(2, str());
3772 }
3773 return (jobjectArray) JNIHandles::make_local(dest());
3774 }
3775 JVM_END
3776
3777 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3778 {
3779 memset(info, 0, info_size);
3780
3781 info->jvm_version = Abstract_VM_Version::jvm_version();
3782 info->patch_version = Abstract_VM_Version::vm_patch_version();
3783
3784 // when we add a new capability in the jvm_version_info struct, we should also
3785 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3786 // counter defined in runtimeService.cpp.
3787 info->is_attachable = AttachListener::is_attach_supported();
3788 }
3789 JVM_END
3790
3791 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3792 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3793 ResourceMark rm(THREAD);
3794
3795 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3796 return NULL;
3797 }
3798
3799 char** vm_flags = Arguments::jvm_flags_array();
3800 char** vm_args = Arguments::jvm_args_array();
3801 int num_flags = Arguments::num_jvm_flags();
3802 int num_args = Arguments::num_jvm_args();
3803
3804 InstanceKlass* ik = SystemDictionary::String_klass();
3805 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3806 objArrayHandle result_h(THREAD, r);
3807
3808 int index = 0;
3809 for (int j = 0; j < num_flags; j++, index++) {
3810 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3811 result_h->obj_at_put(index, h());
3812 }
3813 for (int i = 0; i < num_args; i++, index++) {
3814 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3815 result_h->obj_at_put(index, h());
3816 }
3817 return (jobjectArray) JNIHandles::make_local(env, result_h());
3818 JVM_END
3819
3820 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3821 return os::get_signal_number(name);
3822 JVM_END