1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/javaAssertions.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/stringTable.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/collectedHeap.inline.hpp"
40 #include "interpreter/bytecode.hpp"
41 #include "interpreter/bytecodeUtils.hpp"
42 #include "jfr/jfrEvents.hpp"
43 #include "logging/log.hpp"
44 #include "memory/heapShared.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/referenceType.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/constantPool.hpp"
51 #include "oops/fieldStreams.hpp"
52 #include "oops/instanceKlass.hpp"
53 #include "oops/method.hpp"
54 #include "oops/objArrayKlass.hpp"
55 #include "oops/objArrayOop.inline.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/jvm_misc.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/jvmtiThreadState.hpp"
60 #include "prims/nativeLookup.hpp"
61 #include "prims/stackwalk.hpp"
62 #include "runtime/arguments.hpp"
63 #include "runtime/atomic.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/init.hpp"
66 #include "runtime/interfaceSupport.inline.hpp"
67 #include "runtime/deoptimization.hpp"
68 #include "runtime/handshake.hpp"
69 #include "runtime/java.hpp"
70 #include "runtime/javaCalls.hpp"
71 #include "runtime/jfieldIDWorkaround.hpp"
72 #include "runtime/jniHandles.inline.hpp"
73 #include "runtime/orderAccess.hpp"
74 #include "runtime/os.inline.hpp"
75 #include "runtime/perfData.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/synchronizer.hpp"
78 #include "runtime/thread.inline.hpp"
79 #include "runtime/threadSMR.hpp"
80 #include "runtime/vframe.inline.hpp"
81 #include "runtime/vmOperations.hpp"
82 #include "runtime/vm_version.hpp"
83 #include "services/attachListener.hpp"
84 #include "services/management.hpp"
85 #include "services/threadService.hpp"
86 #include "utilities/copy.hpp"
87 #include "utilities/defaultStream.hpp"
88 #include "utilities/dtrace.hpp"
89 #include "utilities/events.hpp"
90 #include "utilities/histogram.hpp"
91 #include "utilities/macros.hpp"
92 #include "utilities/utf8.hpp"
93 #if INCLUDE_CDS
94 #include "classfile/systemDictionaryShared.hpp"
95 #endif
96
97 #include <errno.h>
98
99 /*
100 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
101 such ctors and calls MUST NOT come between an oop declaration/init and its
102 usage because if objects are move this may cause various memory stomps, bus
103 errors and segfaults. Here is a cookbook for causing so called "naked oop
104 failures":
105
106 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
107 JVMWrapper("JVM_GetClassDeclaredFields");
108
109 // Object address to be held directly in mirror & not visible to GC
110 oop mirror = JNIHandles::resolve_non_null(ofClass);
111
112 // If this ctor can hit a safepoint, moving objects around, then
113 ComplexConstructor foo;
114
115 // Boom! mirror may point to JUNK instead of the intended object
116 (some dereference of mirror)
117
118 // Here's another call that may block for GC, making mirror stale
119 MutexLocker ml(some_lock);
120
121 // And here's an initializer that can result in a stale oop
122 // all in one step.
123 oop o = call_that_can_throw_exception(TRAPS);
124
125
126 The solution is to keep the oop declaration BELOW the ctor or function
127 call that might cause a GC, do another resolve to reassign the oop, or
128 consider use of a Handle instead of an oop so there is immunity from object
129 motion. But note that the "QUICK" entries below do not have a handlemark
130 and thus can only support use of handles passed in.
131 */
132
133 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
134 ResourceMark rm;
135 int line_number = -1;
136 const char * source_file = NULL;
137 const char * trace = "explicit";
138 InstanceKlass* caller = NULL;
139 JavaThread* jthread = JavaThread::current();
140 if (jthread->has_last_Java_frame()) {
141 vframeStream vfst(jthread);
142
143 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
144 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
145 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
146 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
147 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
148
149 Method* last_caller = NULL;
150
151 while (!vfst.at_end()) {
152 Method* m = vfst.method();
153 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
154 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
155 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
156 break;
157 }
158 last_caller = m;
159 vfst.next();
160 }
161 // if this is called from Class.forName0 and that is called from Class.forName,
162 // then print the caller of Class.forName. If this is Class.loadClass, then print
163 // that caller, otherwise keep quiet since this should be picked up elsewhere.
164 bool found_it = false;
165 if (!vfst.at_end() &&
166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
167 vfst.method()->name() == vmSymbols::forName0_name()) {
168 vfst.next();
169 if (!vfst.at_end() &&
170 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
171 vfst.method()->name() == vmSymbols::forName_name()) {
172 vfst.next();
173 found_it = true;
174 }
175 } else if (last_caller != NULL &&
176 last_caller->method_holder()->name() ==
177 vmSymbols::java_lang_ClassLoader() &&
178 last_caller->name() == vmSymbols::loadClass_name()) {
179 found_it = true;
180 } else if (!vfst.at_end()) {
181 if (vfst.method()->is_native()) {
182 // JNI call
183 found_it = true;
184 }
185 }
186 if (found_it && !vfst.at_end()) {
187 // found the caller
188 caller = vfst.method()->method_holder();
189 line_number = vfst.method()->line_number_from_bci(vfst.bci());
190 if (line_number == -1) {
191 // show method name if it's a native method
192 trace = vfst.method()->name_and_sig_as_C_string();
193 }
194 Symbol* s = caller->source_file_name();
195 if (s != NULL) {
196 source_file = s->as_C_string();
197 }
198 }
199 }
200 if (caller != NULL) {
201 if (to_class != caller) {
202 const char * from = caller->external_name();
203 const char * to = to_class->external_name();
204 // print in a single call to reduce interleaving between threads
205 if (source_file != NULL) {
206 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
207 } else {
208 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
209 }
210 }
211 }
212 }
213
214 void trace_class_resolution(Klass* to_class) {
215 EXCEPTION_MARK;
216 trace_class_resolution_impl(to_class, THREAD);
217 if (HAS_PENDING_EXCEPTION) {
218 CLEAR_PENDING_EXCEPTION;
219 }
220 }
221
222 // Wrapper to trace JVM functions
223
224 #ifdef ASSERT
225 Histogram* JVMHistogram;
226 volatile int JVMHistogram_lock = 0;
227
228 class JVMHistogramElement : public HistogramElement {
229 public:
230 JVMHistogramElement(const char* name);
231 };
232
233 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
234 _name = elementName;
235 uintx count = 0;
236
237 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
238 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
239 count +=1;
240 if ( (WarnOnStalledSpinLock > 0)
241 && (count % WarnOnStalledSpinLock == 0)) {
242 warning("JVMHistogram_lock seems to be stalled");
243 }
244 }
245 }
246
247 if(JVMHistogram == NULL)
248 JVMHistogram = new Histogram("JVM Call Counts",100);
249
250 JVMHistogram->add_element(this);
251 Atomic::dec(&JVMHistogram_lock);
252 }
253
254 #define JVMCountWrapper(arg) \
255 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
256 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
257
258 #define JVMWrapper(arg) JVMCountWrapper(arg);
259 #else
260 #define JVMWrapper(arg)
261 #endif
262
263
264 // Interface version /////////////////////////////////////////////////////////////////////
265
266
267 JVM_LEAF(jint, JVM_GetInterfaceVersion())
268 return JVM_INTERFACE_VERSION;
269 JVM_END
270
271
272 // java.lang.System //////////////////////////////////////////////////////////////////////
273
274
275 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
276 JVMWrapper("JVM_CurrentTimeMillis");
277 return os::javaTimeMillis();
278 JVM_END
279
280 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
281 JVMWrapper("JVM_NanoTime");
282 return os::javaTimeNanos();
283 JVM_END
284
285 // The function below is actually exposed by jdk.internal.misc.VM and not
286 // java.lang.System, but we choose to keep it here so that it stays next
287 // to JVM_CurrentTimeMillis and JVM_NanoTime
288
289 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
290 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
291
292 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
293 JVMWrapper("JVM_GetNanoTimeAdjustment");
294 jlong seconds;
295 jlong nanos;
296
297 os::javaTimeSystemUTC(seconds, nanos);
298
299 // We're going to verify that the result can fit in a long.
300 // For that we need the difference in seconds between 'seconds'
301 // and 'offset_secs' to be such that:
302 // |seconds - offset_secs| < (2^63/10^9)
303 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
304 // which makes |seconds - offset_secs| < 2^33
305 // and we will prefer +/- 2^32 as the maximum acceptable diff
306 // as 2^32 has a more natural feel than 2^33...
307 //
308 // So if |seconds - offset_secs| >= 2^32 - we return a special
309 // sentinel value (-1) which the caller should take as an
310 // exception value indicating that the offset given to us is
311 // too far from range of the current time - leading to too big
312 // a nano adjustment. The caller is expected to recover by
313 // computing a more accurate offset and calling this method
314 // again. (For the record 2^32 secs is ~136 years, so that
315 // should rarely happen)
316 //
317 jlong diff = seconds - offset_secs;
318 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
319 return -1; // sentinel value: the offset is too far off the target
320 }
321
322 // return the adjustment. If you compute a time by adding
323 // this number of nanoseconds along with the number of seconds
324 // in the offset you should get the current UTC time.
325 return (diff * (jlong)1000000000) + nanos;
326 JVM_END
327
328 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
329 jobject dst, jint dst_pos, jint length))
330 JVMWrapper("JVM_ArrayCopy");
331 // Check if we have null pointers
332 if (src == NULL || dst == NULL) {
333 THROW(vmSymbols::java_lang_NullPointerException());
334 }
335 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
336 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
337 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
338 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
339 // Do copy
340 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
341 JVM_END
342
343
344 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
345 JavaValue r(T_OBJECT);
346 // public synchronized Object put(Object key, Object value);
347 HandleMark hm(THREAD);
348 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
349 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
350 JavaCalls::call_virtual(&r,
351 props,
352 SystemDictionary::Properties_klass(),
353 vmSymbols::put_name(),
354 vmSymbols::object_object_object_signature(),
355 key_str,
356 value_str,
357 THREAD);
358 }
359
360
361 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
362
363 /*
364 * Return all of the system properties in a Java String array with alternating
365 * names and values from the jvm SystemProperty.
366 * Which includes some internal and all commandline -D defined properties.
367 */
368 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
369 JVMWrapper("JVM_GetProperties");
370 ResourceMark rm(THREAD);
371 HandleMark hm(THREAD);
372 int ndx = 0;
373 int fixedCount = 2;
374
375 SystemProperty* p = Arguments::system_properties();
376 int count = Arguments::PropertyList_count(p);
377
378 // Allocate result String array
379 InstanceKlass* ik = SystemDictionary::String_klass();
380 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
381 objArrayHandle result_h(THREAD, r);
382
383 while (p != NULL) {
384 const char * key = p->key();
385 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
386 const char * value = p->value();
387 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
388 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
389 result_h->obj_at_put(ndx * 2, key_str());
390 result_h->obj_at_put(ndx * 2 + 1, value_str());
391 ndx++;
392 }
393 p = p->next();
394 }
395
396 // Convert the -XX:MaxDirectMemorySize= command line flag
397 // to the sun.nio.MaxDirectMemorySize property.
398 // Do this after setting user properties to prevent people
399 // from setting the value with a -D option, as requested.
400 // Leave empty if not supplied
401 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
402 char as_chars[256];
403 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
404 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
405 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
406 result_h->obj_at_put(ndx * 2, key_str());
407 result_h->obj_at_put(ndx * 2 + 1, value_str());
408 ndx++;
409 }
410
411 // JVM monitoring and management support
412 // Add the sun.management.compiler property for the compiler's name
413 {
414 #undef CSIZE
415 #if defined(_LP64) || defined(_WIN64)
416 #define CSIZE "64-Bit "
417 #else
418 #define CSIZE
419 #endif // 64bit
420
421 #ifdef TIERED
422 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
423 #else
424 #if defined(COMPILER1)
425 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
426 #elif defined(COMPILER2)
427 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
428 #elif INCLUDE_JVMCI
429 #error "INCLUDE_JVMCI should imply TIERED"
430 #else
431 const char* compiler_name = "";
432 #endif // compilers
433 #endif // TIERED
434
435 if (*compiler_name != '\0' &&
436 (Arguments::mode() != Arguments::_int)) {
437 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
438 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
439 result_h->obj_at_put(ndx * 2, key_str());
440 result_h->obj_at_put(ndx * 2 + 1, value_str());
441 ndx++;
442 }
443 }
444
445 return (jobjectArray) JNIHandles::make_local(env, result_h());
446 JVM_END
447
448
449 /*
450 * Return the temporary directory that the VM uses for the attach
451 * and perf data files.
452 *
453 * It is important that this directory is well-known and the
454 * same for all VM instances. It cannot be affected by configuration
455 * variables such as java.io.tmpdir.
456 */
457 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
458 JVMWrapper("JVM_GetTemporaryDirectory");
459 HandleMark hm(THREAD);
460 const char* temp_dir = os::get_temp_directory();
461 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
462 return (jstring) JNIHandles::make_local(env, h());
463 JVM_END
464
465
466 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
467
468 extern volatile jint vm_created;
469
470 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
471 JVMWrapper("JVM_BeforeHalt");
472 EventShutdown event;
473 if (event.should_commit()) {
474 event.set_reason("Shutdown requested from Java");
475 event.commit();
476 }
477 JVM_END
478
479
480 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
481 before_exit(thread);
482 vm_exit(code);
483 JVM_END
484
485
486 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
487 JVMWrapper("JVM_GC");
488 if (!DisableExplicitGC) {
489 if (AsyncDeflateIdleMonitors) {
490 // AsyncDeflateIdleMonitors needs to know when System.gc() is
491 // called so any special deflation can be done at a safepoint.
492 ObjectSynchronizer::set_is_special_deflation_requested(true);
493 }
494 Universe::heap()->collect(GCCause::_java_lang_system_gc);
495 }
496 JVM_END
497
498
499 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
500 JVMWrapper("JVM_MaxObjectInspectionAge");
501 return Universe::heap()->millis_since_last_gc();
502 JVM_END
503
504
505 static inline jlong convert_size_t_to_jlong(size_t val) {
506 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
507 NOT_LP64 (return (jlong)val;)
508 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
509 }
510
511 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
512 JVMWrapper("JVM_TotalMemory");
513 size_t n = Universe::heap()->capacity();
514 return convert_size_t_to_jlong(n);
515 JVM_END
516
517
518 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
519 JVMWrapper("JVM_FreeMemory");
520 size_t n = Universe::heap()->unused();
521 return convert_size_t_to_jlong(n);
522 JVM_END
523
524
525 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
526 JVMWrapper("JVM_MaxMemory");
527 size_t n = Universe::heap()->max_capacity();
528 return convert_size_t_to_jlong(n);
529 JVM_END
530
531
532 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
533 JVMWrapper("JVM_ActiveProcessorCount");
534 return os::active_processor_count();
535 JVM_END
536
537
538
539 // java.lang.Throwable //////////////////////////////////////////////////////
540
541 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
542 JVMWrapper("JVM_FillInStackTrace");
543 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
544 java_lang_Throwable::fill_in_stack_trace(exception);
545 JVM_END
546
547 // java.lang.NullPointerException ///////////////////////////////////////////
548
549 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
550 if (!ShowCodeDetailsInExceptionMessages) return NULL;
551
552 oop exc = JNIHandles::resolve_non_null(throwable);
553
554 Method* method;
555 int bci;
556 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
557 return NULL;
558 }
559 if (method->is_native()) {
560 return NULL;
561 }
562
563 stringStream ss;
564 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
565 if (ok) {
566 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_0);
567 return (jstring) JNIHandles::make_local(env, result);
568 } else {
569 return NULL;
570 }
571 JVM_END
572
573 // java.lang.StackTraceElement //////////////////////////////////////////////
574
575
576 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
577 JVMWrapper("JVM_InitStackTraceElementArray");
578 Handle exception(THREAD, JNIHandles::resolve(throwable));
579 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
580 objArrayHandle stack_trace(THREAD, st);
581 // Fill in the allocated stack trace
582 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
583 JVM_END
584
585
586 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
587 JVMWrapper("JVM_InitStackTraceElement");
588 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
589 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
590 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
591 JVM_END
592
593
594 // java.lang.StackWalker //////////////////////////////////////////////////////
595
596
597 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
598 jint skip_frames, jint frame_count, jint start_index,
599 jobjectArray frames))
600 JVMWrapper("JVM_CallStackWalk");
601 JavaThread* jt = (JavaThread*) THREAD;
602 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
603 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
604 }
605
606 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
607
608 // frames array is a Class<?>[] array when only getting caller reference,
609 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
610 // be null.
611 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
612 objArrayHandle frames_array_h(THREAD, fa);
613
614 int limit = start_index + frame_count;
615 if (frames_array_h->length() < limit) {
616 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
617 }
618
619 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
620 start_index, frames_array_h, CHECK_NULL);
621 return JNIHandles::make_local(env, result);
622 JVM_END
623
624
625 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
626 jint frame_count, jint start_index,
627 jobjectArray frames))
628 JVMWrapper("JVM_MoreStackWalk");
629 JavaThread* jt = (JavaThread*) THREAD;
630
631 // frames array is a Class<?>[] array when only getting caller reference,
632 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
633 // be null.
634 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
635 objArrayHandle frames_array_h(THREAD, fa);
636
637 int limit = start_index+frame_count;
638 if (frames_array_h->length() < limit) {
639 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
640 }
641
642 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
643 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
644 start_index, frames_array_h, THREAD);
645 JVM_END
646
647 // java.lang.Object ///////////////////////////////////////////////
648
649
650 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
651 JVMWrapper("JVM_IHashCode");
652 // as implemented in the classic virtual machine; return 0 if object is NULL
653 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
654 JVM_END
655
656
657 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
658 JVMWrapper("JVM_MonitorWait");
659 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
660 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
661 if (JvmtiExport::should_post_monitor_wait()) {
662 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
663
664 // The current thread already owns the monitor and it has not yet
665 // been added to the wait queue so the current thread cannot be
666 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
667 // event handler cannot accidentally consume an unpark() meant for
668 // the ParkEvent associated with this ObjectMonitor.
669 }
670 ObjectSynchronizer::wait(obj, ms, CHECK);
671 JVM_END
672
673
674 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
675 JVMWrapper("JVM_MonitorNotify");
676 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
677 ObjectSynchronizer::notify(obj, CHECK);
678 JVM_END
679
680
681 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
682 JVMWrapper("JVM_MonitorNotifyAll");
683 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
684 ObjectSynchronizer::notifyall(obj, CHECK);
685 JVM_END
686
687
688 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
689 JVMWrapper("JVM_Clone");
690 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
691 Klass* klass = obj->klass();
692 JvmtiVMObjectAllocEventCollector oam;
693
694 #ifdef ASSERT
695 // Just checking that the cloneable flag is set correct
696 if (obj->is_array()) {
697 guarantee(klass->is_cloneable(), "all arrays are cloneable");
698 } else {
699 guarantee(obj->is_instance(), "should be instanceOop");
700 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
701 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
702 }
703 #endif
704
705 // Check if class of obj supports the Cloneable interface.
706 // All arrays are considered to be cloneable (See JLS 20.1.5).
707 // All j.l.r.Reference classes are considered non-cloneable.
708 if (!klass->is_cloneable() ||
709 (klass->is_instance_klass() &&
710 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
711 ResourceMark rm(THREAD);
712 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
713 }
714
715 // Make shallow object copy
716 const int size = obj->size();
717 oop new_obj_oop = NULL;
718 if (obj->is_array()) {
719 const int length = ((arrayOop)obj())->length();
720 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
721 /* do_zero */ true, CHECK_NULL);
722 } else {
723 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
724 }
725
726 HeapAccess<>::clone(obj(), new_obj_oop, size);
727
728 Handle new_obj(THREAD, new_obj_oop);
729 // Caution: this involves a java upcall, so the clone should be
730 // "gc-robust" by this stage.
731 if (klass->has_finalizer()) {
732 assert(obj->is_instance(), "should be instanceOop");
733 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
734 new_obj = Handle(THREAD, new_obj_oop);
735 }
736
737 return JNIHandles::make_local(env, new_obj());
738 JVM_END
739
740 // java.io.File ///////////////////////////////////////////////////////////////
741
742 JVM_LEAF(char*, JVM_NativePath(char* path))
743 JVMWrapper("JVM_NativePath");
744 return os::native_path(path);
745 JVM_END
746
747
748 // Misc. class handling ///////////////////////////////////////////////////////////
749
750
751 JVM_ENTRY(void, JVM_LinkClass(JNIEnv* env, jclass classClass, jclass arg))
752 JVMWrapper("JVM_LinkClass");
753
754 oop r = JNIHandles::resolve(arg);
755 Klass* klass = java_lang_Class::as_Klass(r);
756
757 if (!ClassForNameDeferLinking && klass->is_instance_klass()) {
758 InstanceKlass::cast(klass)->link_class(CHECK);
759 }
760 JVM_END
761
762 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
763 JVMWrapper("JVM_GetCallerClass");
764
765 // Getting the class of the caller frame.
766 //
767 // The call stack at this point looks something like this:
768 //
769 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
770 // [1] [ @CallerSensitive API.method ]
771 // [.] [ (skipped intermediate frames) ]
772 // [n] [ caller ]
773 vframeStream vfst(thread);
774 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
775 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
776 Method* m = vfst.method();
777 assert(m != NULL, "sanity");
778 switch (n) {
779 case 0:
780 // This must only be called from Reflection.getCallerClass
781 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
782 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
783 }
784 // fall-through
785 case 1:
786 // Frame 0 and 1 must be caller sensitive.
787 if (!m->caller_sensitive()) {
788 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
789 }
790 break;
791 default:
792 if (!m->is_ignored_by_security_stack_walk()) {
793 // We have reached the desired frame; return the holder class.
794 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
795 }
796 break;
797 }
798 }
799 return NULL;
800 JVM_END
801
802
803 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
804 JVMWrapper("JVM_FindPrimitiveClass");
805 oop mirror = NULL;
806 BasicType t = name2type(utf);
807 if (t != T_ILLEGAL && !is_reference_type(t)) {
808 mirror = Universe::java_mirror(t);
809 }
810 if (mirror == NULL) {
811 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
812 } else {
813 return (jclass) JNIHandles::make_local(env, mirror);
814 }
815 JVM_END
816
817
818 // Returns a class loaded by the bootstrap class loader; or null
819 // if not found. ClassNotFoundException is not thrown.
820 // FindClassFromBootLoader is exported to the launcher for windows.
821 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
822 const char* name))
823 JVMWrapper("JVM_FindClassFromBootLoader");
824
825 // Java libraries should ensure that name is never null...
826 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
827 // It's impossible to create this class; the name cannot fit
828 // into the constant pool.
829 return NULL;
830 }
831
832 TempNewSymbol h_name = SymbolTable::new_symbol(name);
833 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
834 if (k == NULL) {
835 return NULL;
836 }
837
838 if (log_is_enabled(Debug, class, resolve)) {
839 trace_class_resolution(k);
840 }
841 return (jclass) JNIHandles::make_local(env, k->java_mirror());
842 JVM_END
843
844 // Find a class with this name in this loader, using the caller's protection domain.
845 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
846 jboolean init, jobject loader,
847 jclass caller))
848 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
849 // Java libraries should ensure that name is never null...
850 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
851 // It's impossible to create this class; the name cannot fit
852 // into the constant pool.
853 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
854 }
855
856 TempNewSymbol h_name = SymbolTable::new_symbol(name);
857
858 oop loader_oop = JNIHandles::resolve(loader);
859 oop from_class = JNIHandles::resolve(caller);
860 oop protection_domain = NULL;
861 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
862 // NPE. Put it in another way, the bootstrap class loader has all permission and
863 // thus no checkPackageAccess equivalence in the VM class loader.
864 // The caller is also passed as NULL by the java code if there is no security
865 // manager to avoid the performance cost of getting the calling class.
866 if (from_class != NULL && loader_oop != NULL) {
867 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
868 }
869
870 Handle h_loader(THREAD, loader_oop);
871 Handle h_prot(THREAD, protection_domain);
872
873 jboolean link = !ClassForNameDeferLinking;
874 jclass result = find_class_from_class_loader(env, h_name, init, link, h_loader,
875 h_prot, false, THREAD);
876 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
877 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
878 }
879 return result;
880 JVM_END
881
882 // Currently only called from the old verifier.
883 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
884 jboolean init, jclass from))
885 JVMWrapper("JVM_FindClassFromClass");
886 if (name == NULL) {
887 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
888 }
889 if ((int)strlen(name) > Symbol::max_length()) {
890 // It's impossible to create this class; the name cannot fit
891 // into the constant pool.
892 Exceptions::fthrow(THREAD_AND_LOCATION,
893 vmSymbols::java_lang_NoClassDefFoundError(),
894 "Class name exceeds maximum length of %d: %s",
895 Symbol::max_length(),
896 name);
897 return 0;
898 }
899 TempNewSymbol h_name = SymbolTable::new_symbol(name);
900 oop from_class_oop = JNIHandles::resolve(from);
901 Klass* from_class = (from_class_oop == NULL)
902 ? (Klass*)NULL
903 : java_lang_Class::as_Klass(from_class_oop);
904 oop class_loader = NULL;
905 oop protection_domain = NULL;
906 if (from_class != NULL) {
907 class_loader = from_class->class_loader();
908 protection_domain = from_class->protection_domain();
909 }
910 Handle h_loader(THREAD, class_loader);
911 Handle h_prot (THREAD, protection_domain);
912 jclass result = find_class_from_class_loader(env, h_name, init, false, h_loader,
913 h_prot, true, thread);
914
915 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
916 // this function is generally only used for class loading during verification.
917 ResourceMark rm;
918 oop from_mirror = JNIHandles::resolve_non_null(from);
919 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
920 const char * from_name = from_class->external_name();
921
922 oop mirror = JNIHandles::resolve_non_null(result);
923 Klass* to_class = java_lang_Class::as_Klass(mirror);
924 const char * to = to_class->external_name();
925 log_debug(class, resolve)("%s %s (verification)", from_name, to);
926 }
927
928 return result;
929 JVM_END
930
931 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
932 if (loader.is_null()) {
933 return;
934 }
935
936 // check whether the current caller thread holds the lock or not.
937 // If not, increment the corresponding counter
938 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
939 ObjectSynchronizer::owner_self) {
940 counter->inc();
941 }
942 }
943
944 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
945 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
946 jobject loader, const jbyte *buf,
947 jsize len, jobject pd, const char *source,
948 TRAPS) {
949 if (source == NULL) source = "__JVM_DefineClass__";
950
951 assert(THREAD->is_Java_thread(), "must be a JavaThread");
952 JavaThread* jt = (JavaThread*) THREAD;
953
954 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
955 ClassLoader::perf_define_appclass_selftime(),
956 ClassLoader::perf_define_appclasses(),
957 jt->get_thread_stat()->perf_recursion_counts_addr(),
958 jt->get_thread_stat()->perf_timers_addr(),
959 PerfClassTraceTime::DEFINE_CLASS);
960
961 if (UsePerfData) {
962 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
963 }
964
965 // Since exceptions can be thrown, class initialization can take place
966 // if name is NULL no check for class name in .class stream has to be made.
967 TempNewSymbol class_name = NULL;
968 if (name != NULL) {
969 const int str_len = (int)strlen(name);
970 if (str_len > Symbol::max_length()) {
971 // It's impossible to create this class; the name cannot fit
972 // into the constant pool.
973 Exceptions::fthrow(THREAD_AND_LOCATION,
974 vmSymbols::java_lang_NoClassDefFoundError(),
975 "Class name exceeds maximum length of %d: %s",
976 Symbol::max_length(),
977 name);
978 return 0;
979 }
980 class_name = SymbolTable::new_symbol(name, str_len);
981 }
982
983 ResourceMark rm(THREAD);
984 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
985 Handle class_loader (THREAD, JNIHandles::resolve(loader));
986 if (UsePerfData) {
987 is_lock_held_by_thread(class_loader,
988 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
989 THREAD);
990 }
991 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
992 Klass* k = SystemDictionary::resolve_from_stream(class_name,
993 class_loader,
994 protection_domain,
995 &st,
996 CHECK_NULL);
997
998 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
999 trace_class_resolution(k);
1000 }
1001
1002 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1003 }
1004
1005
1006 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1007 JVMWrapper("JVM_DefineClass");
1008
1009 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
1010 JVM_END
1011
1012
1013 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1014 JVMWrapper("JVM_DefineClassWithSource");
1015
1016 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
1017 JVM_END
1018
1019 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1020 JVMWrapper("JVM_FindLoadedClass");
1021 ResourceMark rm(THREAD);
1022
1023 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1024 char* str = java_lang_String::as_utf8_string(h_name());
1025
1026 // Sanity check, don't expect null
1027 if (str == NULL) return NULL;
1028
1029 // Internalize the string, converting '.' to '/' in string.
1030 char* p = (char*)str;
1031 while (*p != '\0') {
1032 if (*p == '.') {
1033 *p = '/';
1034 }
1035 p++;
1036 }
1037
1038 const int str_len = (int)(p - str);
1039 if (str_len > Symbol::max_length()) {
1040 // It's impossible to create this class; the name cannot fit
1041 // into the constant pool.
1042 return NULL;
1043 }
1044 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1045
1046 // Security Note:
1047 // The Java level wrapper will perform the necessary security check allowing
1048 // us to pass the NULL as the initiating class loader.
1049 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1050 if (UsePerfData) {
1051 is_lock_held_by_thread(h_loader,
1052 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1053 THREAD);
1054 }
1055
1056 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1057 h_loader,
1058 Handle(),
1059 CHECK_NULL);
1060 #if INCLUDE_CDS
1061 if (k == NULL) {
1062 // If the class is not already loaded, try to see if it's in the shared
1063 // archive for the current classloader (h_loader).
1064 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1065 }
1066 #endif
1067 return (k == NULL) ? NULL :
1068 (jclass) JNIHandles::make_local(env, k->java_mirror());
1069 JVM_END
1070
1071 // Module support //////////////////////////////////////////////////////////////////////////////
1072
1073 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1074 jstring location, const char* const* packages, jsize num_packages))
1075 JVMWrapper("JVM_DefineModule");
1076 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1077 JVM_END
1078
1079 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1080 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1081 Modules::set_bootloader_unnamed_module(module, CHECK);
1082 JVM_END
1083
1084 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1085 JVMWrapper("JVM_AddModuleExports");
1086 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1087 JVM_END
1088
1089 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1090 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1091 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1092 JVM_END
1093
1094 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1095 JVMWrapper("JVM_AddModuleExportsToAll");
1096 Modules::add_module_exports(from_module, package, NULL, CHECK);
1097 JVM_END
1098
1099 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1100 JVMWrapper("JVM_AddReadsModule");
1101 Modules::add_reads_module(from_module, source_module, CHECK);
1102 JVM_END
1103
1104 // Reflection support //////////////////////////////////////////////////////////////////////////////
1105
1106 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1107 assert (cls != NULL, "illegal class");
1108 JVMWrapper("JVM_InitClassName");
1109 JvmtiVMObjectAllocEventCollector oam;
1110 ResourceMark rm(THREAD);
1111 HandleMark hm(THREAD);
1112 Handle java_class(THREAD, JNIHandles::resolve(cls));
1113 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1114 return (jstring) JNIHandles::make_local(env, result);
1115 JVM_END
1116
1117
1118 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1119 JVMWrapper("JVM_GetClassInterfaces");
1120 JvmtiVMObjectAllocEventCollector oam;
1121 oop mirror = JNIHandles::resolve_non_null(cls);
1122
1123 // Special handling for primitive objects
1124 if (java_lang_Class::is_primitive(mirror)) {
1125 // Primitive objects does not have any interfaces
1126 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1127 return (jobjectArray) JNIHandles::make_local(env, r);
1128 }
1129
1130 Klass* klass = java_lang_Class::as_Klass(mirror);
1131 // Figure size of result array
1132 int size;
1133 if (klass->is_instance_klass()) {
1134 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1135 } else {
1136 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1137 size = 2;
1138 }
1139
1140 // Allocate result array
1141 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1142 objArrayHandle result (THREAD, r);
1143 // Fill in result
1144 if (klass->is_instance_klass()) {
1145 // Regular instance klass, fill in all local interfaces
1146 for (int index = 0; index < size; index++) {
1147 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1148 result->obj_at_put(index, k->java_mirror());
1149 }
1150 } else {
1151 // All arrays implement java.lang.Cloneable and java.io.Serializable
1152 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1153 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1154 }
1155 return (jobjectArray) JNIHandles::make_local(env, result());
1156 JVM_END
1157
1158
1159 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1160 JVMWrapper("JVM_IsInterface");
1161 oop mirror = JNIHandles::resolve_non_null(cls);
1162 if (java_lang_Class::is_primitive(mirror)) {
1163 return JNI_FALSE;
1164 }
1165 Klass* k = java_lang_Class::as_Klass(mirror);
1166 jboolean result = k->is_interface();
1167 assert(!result || k->is_instance_klass(),
1168 "all interfaces are instance types");
1169 // The compiler intrinsic for isInterface tests the
1170 // Klass::_access_flags bits in the same way.
1171 return result;
1172 JVM_END
1173
1174
1175 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1176 JVMWrapper("JVM_GetClassSigners");
1177 JvmtiVMObjectAllocEventCollector oam;
1178 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1179 // There are no signers for primitive types
1180 return NULL;
1181 }
1182
1183 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1184
1185 // If there are no signers set in the class, or if the class
1186 // is an array, return NULL.
1187 if (signers == NULL) return NULL;
1188
1189 // copy of the signers array
1190 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1191 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1192 for (int index = 0; index < signers->length(); index++) {
1193 signers_copy->obj_at_put(index, signers->obj_at(index));
1194 }
1195
1196 // return the copy
1197 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1198 JVM_END
1199
1200
1201 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1202 JVMWrapper("JVM_SetClassSigners");
1203 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1204 // This call is ignored for primitive types and arrays.
1205 // Signers are only set once, ClassLoader.java, and thus shouldn't
1206 // be called with an array. Only the bootstrap loader creates arrays.
1207 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1208 if (k->is_instance_klass()) {
1209 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1210 }
1211 }
1212 JVM_END
1213
1214
1215 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1216 JVMWrapper("JVM_GetProtectionDomain");
1217 if (JNIHandles::resolve(cls) == NULL) {
1218 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1219 }
1220
1221 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1222 // Primitive types does not have a protection domain.
1223 return NULL;
1224 }
1225
1226 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1227 return (jobject) JNIHandles::make_local(env, pd);
1228 JVM_END
1229
1230
1231 // Returns the inherited_access_control_context field of the running thread.
1232 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1233 JVMWrapper("JVM_GetInheritedAccessControlContext");
1234 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1235 return JNIHandles::make_local(env, result);
1236 JVM_END
1237
1238 class RegisterArrayForGC {
1239 private:
1240 JavaThread *_thread;
1241 public:
1242 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1243 _thread = thread;
1244 _thread->register_array_for_gc(array);
1245 }
1246
1247 ~RegisterArrayForGC() {
1248 _thread->register_array_for_gc(NULL);
1249 }
1250 };
1251
1252
1253 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1254 JVMWrapper("JVM_GetStackAccessControlContext");
1255 if (!UsePrivilegedStack) return NULL;
1256
1257 ResourceMark rm(THREAD);
1258 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1259 JvmtiVMObjectAllocEventCollector oam;
1260
1261 // count the protection domains on the execution stack. We collapse
1262 // duplicate consecutive protection domains into a single one, as
1263 // well as stopping when we hit a privileged frame.
1264
1265 oop previous_protection_domain = NULL;
1266 Handle privileged_context(thread, NULL);
1267 bool is_privileged = false;
1268 oop protection_domain = NULL;
1269
1270 // Iterate through Java frames
1271 vframeStream vfst(thread);
1272 for(; !vfst.at_end(); vfst.next()) {
1273 // get method of frame
1274 Method* method = vfst.method();
1275
1276 // stop at the first privileged frame
1277 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1278 method->name() == vmSymbols::executePrivileged_name())
1279 {
1280 // this frame is privileged
1281 is_privileged = true;
1282
1283 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1284
1285 StackValueCollection* locals = priv->locals();
1286 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1287 StackValue* clr_sv = locals->at(2); // Class<?> caller
1288 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1289 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1290 privileged_context = ctx_sv->get_obj();
1291 Handle caller = clr_sv->get_obj();
1292
1293 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1294 protection_domain = caller_klass->protection_domain();
1295 } else {
1296 protection_domain = method->method_holder()->protection_domain();
1297 }
1298
1299 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1300 local_array->push(protection_domain);
1301 previous_protection_domain = protection_domain;
1302 }
1303
1304 if (is_privileged) break;
1305 }
1306
1307
1308 // either all the domains on the stack were system domains, or
1309 // we had a privileged system domain
1310 if (local_array->is_empty()) {
1311 if (is_privileged && privileged_context.is_null()) return NULL;
1312
1313 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1314 return JNIHandles::make_local(env, result);
1315 }
1316
1317 // the resource area must be registered in case of a gc
1318 RegisterArrayForGC ragc(thread, local_array);
1319 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1320 local_array->length(), CHECK_NULL);
1321 objArrayHandle h_context(thread, context);
1322 for (int index = 0; index < local_array->length(); index++) {
1323 h_context->obj_at_put(index, local_array->at(index));
1324 }
1325
1326 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1327
1328 return JNIHandles::make_local(env, result);
1329 JVM_END
1330
1331
1332 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1333 JVMWrapper("JVM_IsArrayClass");
1334 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1335 return (k != NULL) && k->is_array_klass() ? true : false;
1336 JVM_END
1337
1338
1339 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1340 JVMWrapper("JVM_IsPrimitiveClass");
1341 oop mirror = JNIHandles::resolve_non_null(cls);
1342 return (jboolean) java_lang_Class::is_primitive(mirror);
1343 JVM_END
1344
1345
1346 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1347 JVMWrapper("JVM_GetClassModifiers");
1348 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1349 // Primitive type
1350 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1351 }
1352
1353 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1354 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1355 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1356 return k->modifier_flags();
1357 JVM_END
1358
1359
1360 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1361
1362 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1363 JvmtiVMObjectAllocEventCollector oam;
1364 // ofClass is a reference to a java_lang_Class object. The mirror object
1365 // of an InstanceKlass
1366
1367 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1368 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1369 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1370 return (jobjectArray)JNIHandles::make_local(env, result);
1371 }
1372
1373 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1374 InnerClassesIterator iter(k);
1375
1376 if (iter.length() == 0) {
1377 // Neither an inner nor outer class
1378 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1379 return (jobjectArray)JNIHandles::make_local(env, result);
1380 }
1381
1382 // find inner class info
1383 constantPoolHandle cp(thread, k->constants());
1384 int length = iter.length();
1385
1386 // Allocate temp. result array
1387 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1388 objArrayHandle result (THREAD, r);
1389 int members = 0;
1390
1391 for (; !iter.done(); iter.next()) {
1392 int ioff = iter.inner_class_info_index();
1393 int ooff = iter.outer_class_info_index();
1394
1395 if (ioff != 0 && ooff != 0) {
1396 // Check to see if the name matches the class we're looking for
1397 // before attempting to find the class.
1398 if (cp->klass_name_at_matches(k, ooff)) {
1399 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1400 if (outer_klass == k) {
1401 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1402 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1403
1404 // Throws an exception if outer klass has not declared k as
1405 // an inner klass
1406 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1407
1408 result->obj_at_put(members, inner_klass->java_mirror());
1409 members++;
1410 }
1411 }
1412 }
1413 }
1414
1415 if (members != length) {
1416 // Return array of right length
1417 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1418 for(int i = 0; i < members; i++) {
1419 res->obj_at_put(i, result->obj_at(i));
1420 }
1421 return (jobjectArray)JNIHandles::make_local(env, res);
1422 }
1423
1424 return (jobjectArray)JNIHandles::make_local(env, result());
1425 JVM_END
1426
1427
1428 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1429 {
1430 // ofClass is a reference to a java_lang_Class object.
1431 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1432 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1433 return NULL;
1434 }
1435
1436 bool inner_is_member = false;
1437 Klass* outer_klass
1438 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1439 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1440 if (outer_klass == NULL) return NULL; // already a top-level class
1441 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1442 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1443 }
1444 JVM_END
1445
1446 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1447 {
1448 oop mirror = JNIHandles::resolve_non_null(cls);
1449 if (java_lang_Class::is_primitive(mirror) ||
1450 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1451 return NULL;
1452 }
1453 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1454 int ooff = 0, noff = 0;
1455 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1456 if (noff != 0) {
1457 constantPoolHandle i_cp(thread, k->constants());
1458 Symbol* name = i_cp->symbol_at(noff);
1459 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1460 return (jstring) JNIHandles::make_local(env, str());
1461 }
1462 }
1463 return NULL;
1464 }
1465 JVM_END
1466
1467 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1468 assert (cls != NULL, "illegal class");
1469 JVMWrapper("JVM_GetClassSignature");
1470 JvmtiVMObjectAllocEventCollector oam;
1471 ResourceMark rm(THREAD);
1472 // Return null for arrays and primatives
1473 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1475 if (k->is_instance_klass()) {
1476 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1477 if (sym == NULL) return NULL;
1478 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1479 return (jstring) JNIHandles::make_local(env, str());
1480 }
1481 }
1482 return NULL;
1483 JVM_END
1484
1485
1486 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1487 assert (cls != NULL, "illegal class");
1488 JVMWrapper("JVM_GetClassAnnotations");
1489
1490 // Return null for arrays and primitives
1491 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1493 if (k->is_instance_klass()) {
1494 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1495 return (jbyteArray) JNIHandles::make_local(env, a);
1496 }
1497 }
1498 return NULL;
1499 JVM_END
1500
1501
1502 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1503 // some of this code was adapted from from jni_FromReflectedField
1504
1505 oop reflected = JNIHandles::resolve_non_null(field);
1506 oop mirror = java_lang_reflect_Field::clazz(reflected);
1507 Klass* k = java_lang_Class::as_Klass(mirror);
1508 int slot = java_lang_reflect_Field::slot(reflected);
1509 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1510
1511 InstanceKlass* ik = InstanceKlass::cast(k);
1512 intptr_t offset = ik->field_offset(slot);
1513
1514 if (modifiers & JVM_ACC_STATIC) {
1515 // for static fields we only look in the current class
1516 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1517 assert(false, "cannot find static field");
1518 return false;
1519 }
1520 } else {
1521 // for instance fields we start with the current class and work
1522 // our way up through the superclass chain
1523 if (!ik->find_field_from_offset(offset, false, &fd)) {
1524 assert(false, "cannot find instance field");
1525 return false;
1526 }
1527 }
1528 return true;
1529 }
1530
1531 static Method* jvm_get_method_common(jobject method) {
1532 // some of this code was adapted from from jni_FromReflectedMethod
1533
1534 oop reflected = JNIHandles::resolve_non_null(method);
1535 oop mirror = NULL;
1536 int slot = 0;
1537
1538 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1539 mirror = java_lang_reflect_Constructor::clazz(reflected);
1540 slot = java_lang_reflect_Constructor::slot(reflected);
1541 } else {
1542 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1543 "wrong type");
1544 mirror = java_lang_reflect_Method::clazz(reflected);
1545 slot = java_lang_reflect_Method::slot(reflected);
1546 }
1547 Klass* k = java_lang_Class::as_Klass(mirror);
1548
1549 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1550 assert(m != NULL, "cannot find method");
1551 return m; // caller has to deal with NULL in product mode
1552 }
1553
1554 /* Type use annotations support (JDK 1.8) */
1555
1556 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1557 assert (cls != NULL, "illegal class");
1558 JVMWrapper("JVM_GetClassTypeAnnotations");
1559 ResourceMark rm(THREAD);
1560 // Return null for arrays and primitives
1561 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1562 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1563 if (k->is_instance_klass()) {
1564 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1565 if (type_annotations != NULL) {
1566 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1567 return (jbyteArray) JNIHandles::make_local(env, a);
1568 }
1569 }
1570 }
1571 return NULL;
1572 JVM_END
1573
1574 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1575 assert (method != NULL, "illegal method");
1576 JVMWrapper("JVM_GetMethodTypeAnnotations");
1577
1578 // method is a handle to a java.lang.reflect.Method object
1579 Method* m = jvm_get_method_common(method);
1580 if (m == NULL) {
1581 return NULL;
1582 }
1583
1584 AnnotationArray* type_annotations = m->type_annotations();
1585 if (type_annotations != NULL) {
1586 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1587 return (jbyteArray) JNIHandles::make_local(env, a);
1588 }
1589
1590 return NULL;
1591 JVM_END
1592
1593 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1594 assert (field != NULL, "illegal field");
1595 JVMWrapper("JVM_GetFieldTypeAnnotations");
1596
1597 fieldDescriptor fd;
1598 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1599 if (!gotFd) {
1600 return NULL;
1601 }
1602
1603 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1604 JVM_END
1605
1606 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1607 if (!cp->is_within_bounds(index)) {
1608 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1609 }
1610 }
1611
1612 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1613 {
1614 JVMWrapper("JVM_GetMethodParameters");
1615 // method is a handle to a java.lang.reflect.Method object
1616 Method* method_ptr = jvm_get_method_common(method);
1617 methodHandle mh (THREAD, method_ptr);
1618 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1619 const int num_params = mh->method_parameters_length();
1620
1621 if (num_params < 0) {
1622 // A -1 return value from method_parameters_length means there is no
1623 // parameter data. Return null to indicate this to the reflection
1624 // API.
1625 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1626 return (jobjectArray)NULL;
1627 } else {
1628 // Otherwise, we return something up to reflection, even if it is
1629 // a zero-length array. Why? Because in some cases this can
1630 // trigger a MalformedParametersException.
1631
1632 // make sure all the symbols are properly formatted
1633 for (int i = 0; i < num_params; i++) {
1634 MethodParametersElement* params = mh->method_parameters_start();
1635 int index = params[i].name_cp_index;
1636 bounds_check(mh->constants(), index, CHECK_NULL);
1637
1638 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1639 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1640 "Wrong type at constant pool index");
1641 }
1642
1643 }
1644
1645 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1646 objArrayHandle result (THREAD, result_oop);
1647
1648 for (int i = 0; i < num_params; i++) {
1649 MethodParametersElement* params = mh->method_parameters_start();
1650 // For a 0 index, give a NULL symbol
1651 Symbol* sym = 0 != params[i].name_cp_index ?
1652 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1653 int flags = params[i].flags;
1654 oop param = Reflection::new_parameter(reflected_method, i, sym,
1655 flags, CHECK_NULL);
1656 result->obj_at_put(i, param);
1657 }
1658 return (jobjectArray)JNIHandles::make_local(env, result());
1659 }
1660 }
1661 JVM_END
1662
1663 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1664
1665 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1666 {
1667 JVMWrapper("JVM_GetClassDeclaredFields");
1668 JvmtiVMObjectAllocEventCollector oam;
1669
1670 // Exclude primitive types and array types
1671 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1672 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1673 // Return empty array
1674 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1675 return (jobjectArray) JNIHandles::make_local(env, res);
1676 }
1677
1678 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1679 constantPoolHandle cp(THREAD, k->constants());
1680
1681 // Ensure class is linked
1682 k->link_class(CHECK_NULL);
1683
1684 // Allocate result
1685 int num_fields;
1686
1687 if (publicOnly) {
1688 num_fields = 0;
1689 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1690 if (fs.access_flags().is_public()) ++num_fields;
1691 }
1692 } else {
1693 num_fields = k->java_fields_count();
1694 }
1695
1696 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1697 objArrayHandle result (THREAD, r);
1698
1699 int out_idx = 0;
1700 fieldDescriptor fd;
1701 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1702 if (!publicOnly || fs.access_flags().is_public()) {
1703 fd.reinitialize(k, fs.index());
1704 oop field = Reflection::new_field(&fd, CHECK_NULL);
1705 result->obj_at_put(out_idx, field);
1706 ++out_idx;
1707 }
1708 }
1709 assert(out_idx == num_fields, "just checking");
1710 return (jobjectArray) JNIHandles::make_local(env, result());
1711 }
1712 JVM_END
1713
1714 static bool select_method(const methodHandle& method, bool want_constructor) {
1715 if (want_constructor) {
1716 return (method->is_initializer() && !method->is_static());
1717 } else {
1718 return (!method->is_initializer() && !method->is_overpass());
1719 }
1720 }
1721
1722 static jobjectArray get_class_declared_methods_helper(
1723 JNIEnv *env,
1724 jclass ofClass, jboolean publicOnly,
1725 bool want_constructor,
1726 Klass* klass, TRAPS) {
1727
1728 JvmtiVMObjectAllocEventCollector oam;
1729
1730 // Exclude primitive types and array types
1731 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1732 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1733 // Return empty array
1734 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1735 return (jobjectArray) JNIHandles::make_local(env, res);
1736 }
1737
1738 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1739
1740 // Ensure class is linked
1741 k->link_class(CHECK_NULL);
1742
1743 Array<Method*>* methods = k->methods();
1744 int methods_length = methods->length();
1745
1746 // Save original method_idnum in case of redefinition, which can change
1747 // the idnum of obsolete methods. The new method will have the same idnum
1748 // but if we refresh the methods array, the counts will be wrong.
1749 ResourceMark rm(THREAD);
1750 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1751 int num_methods = 0;
1752
1753 for (int i = 0; i < methods_length; i++) {
1754 methodHandle method(THREAD, methods->at(i));
1755 if (select_method(method, want_constructor)) {
1756 if (!publicOnly || method->is_public()) {
1757 idnums->push(method->method_idnum());
1758 ++num_methods;
1759 }
1760 }
1761 }
1762
1763 // Allocate result
1764 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1765 objArrayHandle result (THREAD, r);
1766
1767 // Now just put the methods that we selected above, but go by their idnum
1768 // in case of redefinition. The methods can be redefined at any safepoint,
1769 // so above when allocating the oop array and below when creating reflect
1770 // objects.
1771 for (int i = 0; i < num_methods; i++) {
1772 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1773 if (method.is_null()) {
1774 // Method may have been deleted and seems this API can handle null
1775 // Otherwise should probably put a method that throws NSME
1776 result->obj_at_put(i, NULL);
1777 } else {
1778 oop m;
1779 if (want_constructor) {
1780 m = Reflection::new_constructor(method, CHECK_NULL);
1781 } else {
1782 m = Reflection::new_method(method, false, CHECK_NULL);
1783 }
1784 result->obj_at_put(i, m);
1785 }
1786 }
1787
1788 return (jobjectArray) JNIHandles::make_local(env, result());
1789 }
1790
1791 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1792 {
1793 JVMWrapper("JVM_GetClassDeclaredMethods");
1794 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1795 /*want_constructor*/ false,
1796 SystemDictionary::reflect_Method_klass(), THREAD);
1797 }
1798 JVM_END
1799
1800 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1801 {
1802 JVMWrapper("JVM_GetClassDeclaredConstructors");
1803 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1804 /*want_constructor*/ true,
1805 SystemDictionary::reflect_Constructor_klass(), THREAD);
1806 }
1807 JVM_END
1808
1809 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1810 {
1811 JVMWrapper("JVM_GetClassAccessFlags");
1812 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1813 // Primitive type
1814 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1815 }
1816
1817 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1818 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1819 }
1820 JVM_END
1821
1822 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1823 {
1824 JVMWrapper("JVM_AreNestMates");
1825 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1826 assert(c->is_instance_klass(), "must be");
1827 InstanceKlass* ck = InstanceKlass::cast(c);
1828 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1829 assert(m->is_instance_klass(), "must be");
1830 InstanceKlass* mk = InstanceKlass::cast(m);
1831 return ck->has_nestmate_access_to(mk, THREAD);
1832 }
1833 JVM_END
1834
1835 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1836 {
1837 // current is not a primitive or array class
1838 JVMWrapper("JVM_GetNestHost");
1839 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1840 assert(c->is_instance_klass(), "must be");
1841 InstanceKlass* ck = InstanceKlass::cast(c);
1842 // Don't post exceptions if validation fails
1843 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1844 return (jclass) (host == NULL ? NULL :
1845 JNIHandles::make_local(THREAD, host->java_mirror()));
1846 }
1847 JVM_END
1848
1849 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1850 {
1851 // current is not a primitive or array class
1852 JVMWrapper("JVM_GetNestMembers");
1853 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1854 assert(c->is_instance_klass(), "must be");
1855 InstanceKlass* ck = InstanceKlass::cast(c);
1856 // Get the nest host for this nest - throw ICCE if validation fails
1857 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1858 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1859
1860 {
1861 JvmtiVMObjectAllocEventCollector oam;
1862 Array<u2>* members = host->nest_members();
1863 int length = members == NULL ? 0 : members->length();
1864 // nest host is first in the array so make it one bigger
1865 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1866 length + 1, CHECK_NULL);
1867 objArrayHandle result (THREAD, r);
1868 result->obj_at_put(0, host->java_mirror());
1869 if (length != 0) {
1870 int i;
1871 for (i = 0; i < length; i++) {
1872 int cp_index = members->at(i);
1873 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1874 if (k->is_instance_klass()) {
1875 InstanceKlass* nest_host_k =
1876 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1877 if (nest_host_k == host) {
1878 result->obj_at_put(i+1, k->java_mirror());
1879 }
1880 else {
1881 // k's nest host is legal but it isn't our host so
1882 // throw ICCE
1883 ResourceMark rm(THREAD);
1884 Exceptions::fthrow(THREAD_AND_LOCATION,
1885 icce,
1886 "Nest member %s in %s declares a different nest host of %s",
1887 k->external_name(),
1888 host->external_name(),
1889 nest_host_k->external_name()
1890 );
1891 return NULL;
1892 }
1893 }
1894 else {
1895 // we have a bad nest member entry - throw ICCE
1896 ResourceMark rm(THREAD);
1897 Exceptions::fthrow(THREAD_AND_LOCATION,
1898 icce,
1899 "Class %s can not be a nest member of %s",
1900 k->external_name(),
1901 host->external_name()
1902 );
1903 return NULL;
1904 }
1905 }
1906 }
1907 else {
1908 assert(host == ck, "must be singleton nest");
1909 }
1910 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1911 }
1912 }
1913 JVM_END
1914
1915 // Constant pool access //////////////////////////////////////////////////////////
1916
1917 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1918 {
1919 JVMWrapper("JVM_GetClassConstantPool");
1920 JvmtiVMObjectAllocEventCollector oam;
1921
1922 // Return null for primitives and arrays
1923 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1924 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1925 if (k->is_instance_klass()) {
1926 InstanceKlass* k_h = InstanceKlass::cast(k);
1927 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1928 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1929 return JNIHandles::make_local(jcp());
1930 }
1931 }
1932 return NULL;
1933 }
1934 JVM_END
1935
1936
1937 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1938 {
1939 JVMWrapper("JVM_ConstantPoolGetSize");
1940 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1941 return cp->length();
1942 }
1943 JVM_END
1944
1945
1946 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1947 {
1948 JVMWrapper("JVM_ConstantPoolGetClassAt");
1949 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1950 bounds_check(cp, index, CHECK_NULL);
1951 constantTag tag = cp->tag_at(index);
1952 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1953 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1954 }
1955 Klass* k = cp->klass_at(index, CHECK_NULL);
1956 return (jclass) JNIHandles::make_local(k->java_mirror());
1957 }
1958 JVM_END
1959
1960 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1961 {
1962 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1963 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1964 bounds_check(cp, index, CHECK_NULL);
1965 constantTag tag = cp->tag_at(index);
1966 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1967 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1968 }
1969 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1970 if (k == NULL) return NULL;
1971 return (jclass) JNIHandles::make_local(k->java_mirror());
1972 }
1973 JVM_END
1974
1975 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1976 constantTag tag = cp->tag_at(index);
1977 if (!tag.is_method() && !tag.is_interface_method()) {
1978 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1979 }
1980 int klass_ref = cp->uncached_klass_ref_index_at(index);
1981 Klass* k_o;
1982 if (force_resolution) {
1983 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1984 } else {
1985 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1986 if (k_o == NULL) return NULL;
1987 }
1988 InstanceKlass* k = InstanceKlass::cast(k_o);
1989 Symbol* name = cp->uncached_name_ref_at(index);
1990 Symbol* sig = cp->uncached_signature_ref_at(index);
1991 methodHandle m (THREAD, k->find_method(name, sig));
1992 if (m.is_null()) {
1993 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1994 }
1995 oop method;
1996 if (!m->is_initializer() || m->is_static()) {
1997 method = Reflection::new_method(m, true, CHECK_NULL);
1998 } else {
1999 method = Reflection::new_constructor(m, CHECK_NULL);
2000 }
2001 return JNIHandles::make_local(method);
2002 }
2003
2004 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2005 {
2006 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2007 JvmtiVMObjectAllocEventCollector oam;
2008 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2009 bounds_check(cp, index, CHECK_NULL);
2010 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2011 return res;
2012 }
2013 JVM_END
2014
2015 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2016 {
2017 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2018 JvmtiVMObjectAllocEventCollector oam;
2019 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2020 bounds_check(cp, index, CHECK_NULL);
2021 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2022 return res;
2023 }
2024 JVM_END
2025
2026 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2027 constantTag tag = cp->tag_at(index);
2028 if (!tag.is_field()) {
2029 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2030 }
2031 int klass_ref = cp->uncached_klass_ref_index_at(index);
2032 Klass* k_o;
2033 if (force_resolution) {
2034 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2035 } else {
2036 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2037 if (k_o == NULL) return NULL;
2038 }
2039 InstanceKlass* k = InstanceKlass::cast(k_o);
2040 Symbol* name = cp->uncached_name_ref_at(index);
2041 Symbol* sig = cp->uncached_signature_ref_at(index);
2042 fieldDescriptor fd;
2043 Klass* target_klass = k->find_field(name, sig, &fd);
2044 if (target_klass == NULL) {
2045 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2046 }
2047 oop field = Reflection::new_field(&fd, CHECK_NULL);
2048 return JNIHandles::make_local(field);
2049 }
2050
2051 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2052 {
2053 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2054 JvmtiVMObjectAllocEventCollector oam;
2055 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2056 bounds_check(cp, index, CHECK_NULL);
2057 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2058 return res;
2059 }
2060 JVM_END
2061
2062 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2063 {
2064 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2065 JvmtiVMObjectAllocEventCollector oam;
2066 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2067 bounds_check(cp, index, CHECK_NULL);
2068 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2069 return res;
2070 }
2071 JVM_END
2072
2073 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2074 {
2075 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2076 JvmtiVMObjectAllocEventCollector oam;
2077 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2078 bounds_check(cp, index, CHECK_NULL);
2079 constantTag tag = cp->tag_at(index);
2080 if (!tag.is_field_or_method()) {
2081 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2082 }
2083 int klass_ref = cp->uncached_klass_ref_index_at(index);
2084 Symbol* klass_name = cp->klass_name_at(klass_ref);
2085 Symbol* member_name = cp->uncached_name_ref_at(index);
2086 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2087 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2088 objArrayHandle dest(THREAD, dest_o);
2089 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2090 dest->obj_at_put(0, str());
2091 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2092 dest->obj_at_put(1, str());
2093 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2094 dest->obj_at_put(2, str());
2095 return (jobjectArray) JNIHandles::make_local(dest());
2096 }
2097 JVM_END
2098
2099 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2100 {
2101 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2102 JvmtiVMObjectAllocEventCollector oam;
2103 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2104 bounds_check(cp, index, CHECK_0);
2105 constantTag tag = cp->tag_at(index);
2106 if (!tag.is_field_or_method()) {
2107 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2108 }
2109 return (jint) cp->uncached_klass_ref_index_at(index);
2110 }
2111 JVM_END
2112
2113 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2114 {
2115 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2116 JvmtiVMObjectAllocEventCollector oam;
2117 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2118 bounds_check(cp, index, CHECK_0);
2119 constantTag tag = cp->tag_at(index);
2120 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2121 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2122 }
2123 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2124 }
2125 JVM_END
2126
2127 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2128 {
2129 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2130 JvmtiVMObjectAllocEventCollector oam;
2131 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2132 bounds_check(cp, index, CHECK_NULL);
2133 constantTag tag = cp->tag_at(index);
2134 if (!tag.is_name_and_type()) {
2135 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2136 }
2137 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2138 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2139 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2140 objArrayHandle dest(THREAD, dest_o);
2141 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2142 dest->obj_at_put(0, str());
2143 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2144 dest->obj_at_put(1, str());
2145 return (jobjectArray) JNIHandles::make_local(dest());
2146 }
2147 JVM_END
2148
2149 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2150 {
2151 JVMWrapper("JVM_ConstantPoolGetIntAt");
2152 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2153 bounds_check(cp, index, CHECK_0);
2154 constantTag tag = cp->tag_at(index);
2155 if (!tag.is_int()) {
2156 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2157 }
2158 return cp->int_at(index);
2159 }
2160 JVM_END
2161
2162 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2163 {
2164 JVMWrapper("JVM_ConstantPoolGetLongAt");
2165 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2166 bounds_check(cp, index, CHECK_(0L));
2167 constantTag tag = cp->tag_at(index);
2168 if (!tag.is_long()) {
2169 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2170 }
2171 return cp->long_at(index);
2172 }
2173 JVM_END
2174
2175 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2176 {
2177 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2178 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2179 bounds_check(cp, index, CHECK_(0.0f));
2180 constantTag tag = cp->tag_at(index);
2181 if (!tag.is_float()) {
2182 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2183 }
2184 return cp->float_at(index);
2185 }
2186 JVM_END
2187
2188 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2191 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2192 bounds_check(cp, index, CHECK_(0.0));
2193 constantTag tag = cp->tag_at(index);
2194 if (!tag.is_double()) {
2195 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2196 }
2197 return cp->double_at(index);
2198 }
2199 JVM_END
2200
2201 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2202 {
2203 JVMWrapper("JVM_ConstantPoolGetStringAt");
2204 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2205 bounds_check(cp, index, CHECK_NULL);
2206 constantTag tag = cp->tag_at(index);
2207 if (!tag.is_string()) {
2208 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2209 }
2210 oop str = cp->string_at(index, CHECK_NULL);
2211 return (jstring) JNIHandles::make_local(str);
2212 }
2213 JVM_END
2214
2215 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2216 {
2217 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2218 JvmtiVMObjectAllocEventCollector oam;
2219 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2220 bounds_check(cp, index, CHECK_NULL);
2221 constantTag tag = cp->tag_at(index);
2222 if (!tag.is_symbol()) {
2223 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2224 }
2225 Symbol* sym = cp->symbol_at(index);
2226 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2227 return (jstring) JNIHandles::make_local(str());
2228 }
2229 JVM_END
2230
2231 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2232 {
2233 JVMWrapper("JVM_ConstantPoolGetTagAt");
2234 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2235 bounds_check(cp, index, CHECK_0);
2236 constantTag tag = cp->tag_at(index);
2237 jbyte result = tag.value();
2238 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2239 // they are changed to the corresponding tags from the JVM spec, so that java code in
2240 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2241 if (tag.is_klass_or_reference()) {
2242 result = JVM_CONSTANT_Class;
2243 } else if (tag.is_string_index()) {
2244 result = JVM_CONSTANT_String;
2245 } else if (tag.is_method_type_in_error()) {
2246 result = JVM_CONSTANT_MethodType;
2247 } else if (tag.is_method_handle_in_error()) {
2248 result = JVM_CONSTANT_MethodHandle;
2249 } else if (tag.is_dynamic_constant_in_error()) {
2250 result = JVM_CONSTANT_Dynamic;
2251 }
2252 return result;
2253 }
2254 JVM_END
2255
2256 // Assertion support. //////////////////////////////////////////////////////////
2257
2258 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2259 JVMWrapper("JVM_DesiredAssertionStatus");
2260 assert(cls != NULL, "bad class");
2261
2262 oop r = JNIHandles::resolve(cls);
2263 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2264 if (java_lang_Class::is_primitive(r)) return false;
2265
2266 Klass* k = java_lang_Class::as_Klass(r);
2267 assert(k->is_instance_klass(), "must be an instance klass");
2268 if (!k->is_instance_klass()) return false;
2269
2270 ResourceMark rm(THREAD);
2271 const char* name = k->name()->as_C_string();
2272 bool system_class = k->class_loader() == NULL;
2273 return JavaAssertions::enabled(name, system_class);
2274
2275 JVM_END
2276
2277
2278 // Return a new AssertionStatusDirectives object with the fields filled in with
2279 // command-line assertion arguments (i.e., -ea, -da).
2280 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2281 JVMWrapper("JVM_AssertionStatusDirectives");
2282 JvmtiVMObjectAllocEventCollector oam;
2283 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2284 return JNIHandles::make_local(env, asd);
2285 JVM_END
2286
2287 // Verification ////////////////////////////////////////////////////////////////////////////////
2288
2289 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2290
2291 // RedefineClasses support: bug 6214132 caused verification to fail.
2292 // All functions from this section should call the jvmtiThreadSate function:
2293 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2294 // The function returns a Klass* of the _scratch_class if the verifier
2295 // was invoked in the middle of the class redefinition.
2296 // Otherwise it returns its argument value which is the _the_class Klass*.
2297 // Please, refer to the description in the jvmtiThreadSate.hpp.
2298
2299 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2300 JVMWrapper("JVM_GetClassNameUTF");
2301 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2302 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2303 return k->name()->as_utf8();
2304 JVM_END
2305
2306
2307 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2308 JVMWrapper("JVM_GetClassCPTypes");
2309 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2310 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2311 // types will have length zero if this is not an InstanceKlass
2312 // (length is determined by call to JVM_GetClassCPEntriesCount)
2313 if (k->is_instance_klass()) {
2314 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2315 for (int index = cp->length() - 1; index >= 0; index--) {
2316 constantTag tag = cp->tag_at(index);
2317 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2318 }
2319 }
2320 JVM_END
2321
2322
2323 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2324 JVMWrapper("JVM_GetClassCPEntriesCount");
2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2327 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2328 JVM_END
2329
2330
2331 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2332 JVMWrapper("JVM_GetClassFieldsCount");
2333 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2334 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2335 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2336 JVM_END
2337
2338
2339 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2340 JVMWrapper("JVM_GetClassMethodsCount");
2341 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2342 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2343 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2344 JVM_END
2345
2346
2347 // The following methods, used for the verifier, are never called with
2348 // array klasses, so a direct cast to InstanceKlass is safe.
2349 // Typically, these methods are called in a loop with bounds determined
2350 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2351 // zero for arrays.
2352 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2353 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2357 int length = method->checked_exceptions_length();
2358 if (length > 0) {
2359 CheckedExceptionElement* table= method->checked_exceptions_start();
2360 for (int i = 0; i < length; i++) {
2361 exceptions[i] = table[i].class_cp_index;
2362 }
2363 }
2364 JVM_END
2365
2366
2367 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2368 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2372 return method->checked_exceptions_length();
2373 JVM_END
2374
2375
2376 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2377 JVMWrapper("JVM_GetMethodIxByteCode");
2378 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2379 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2380 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2381 memcpy(code, method->code_base(), method->code_size());
2382 JVM_END
2383
2384
2385 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2386 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2389 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2390 return method->code_size();
2391 JVM_END
2392
2393
2394 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2395 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 ExceptionTable extable(method);
2400 entry->start_pc = extable.start_pc(entry_index);
2401 entry->end_pc = extable.end_pc(entry_index);
2402 entry->handler_pc = extable.handler_pc(entry_index);
2403 entry->catchType = extable.catch_type_index(entry_index);
2404 JVM_END
2405
2406
2407 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2408 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2412 return method->exception_table_length();
2413 JVM_END
2414
2415
2416 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2417 JVMWrapper("JVM_GetMethodIxModifiers");
2418 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2419 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2420 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2421 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2422 JVM_END
2423
2424
2425 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2426 JVMWrapper("JVM_GetFieldIxModifiers");
2427 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2428 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2429 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2430 JVM_END
2431
2432
2433 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2434 JVMWrapper("JVM_GetMethodIxLocalsCount");
2435 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2436 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2437 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2438 return method->max_locals();
2439 JVM_END
2440
2441
2442 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2443 JVMWrapper("JVM_GetMethodIxArgsSize");
2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2447 return method->size_of_parameters();
2448 JVM_END
2449
2450
2451 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2452 JVMWrapper("JVM_GetMethodIxMaxStack");
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2456 return method->verifier_max_stack();
2457 JVM_END
2458
2459
2460 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2461 JVMWrapper("JVM_IsConstructorIx");
2462 ResourceMark rm(THREAD);
2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2466 return method->name() == vmSymbols::object_initializer_name();
2467 JVM_END
2468
2469
2470 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2471 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2472 ResourceMark rm(THREAD);
2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2476 return method->is_overpass();
2477 JVM_END
2478
2479 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2480 JVMWrapper("JVM_GetMethodIxIxUTF");
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2484 return method->name()->as_utf8();
2485 JVM_END
2486
2487
2488 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2489 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2493 return method->signature()->as_utf8();
2494 JVM_END
2495
2496 /**
2497 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2498 * read entries in the constant pool. Since the old verifier always
2499 * works on a copy of the code, it will not see any rewriting that
2500 * may possibly occur in the middle of verification. So it is important
2501 * that nothing it calls tries to use the cpCache instead of the raw
2502 * constant pool, so we must use cp->uncached_x methods when appropriate.
2503 */
2504 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2505 JVMWrapper("JVM_GetCPFieldNameUTF");
2506 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2507 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2508 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2509 switch (cp->tag_at(cp_index).value()) {
2510 case JVM_CONSTANT_Fieldref:
2511 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2512 default:
2513 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2514 }
2515 ShouldNotReachHere();
2516 return NULL;
2517 JVM_END
2518
2519
2520 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2521 JVMWrapper("JVM_GetCPMethodNameUTF");
2522 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2523 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2524 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2525 switch (cp->tag_at(cp_index).value()) {
2526 case JVM_CONSTANT_InterfaceMethodref:
2527 case JVM_CONSTANT_Methodref:
2528 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2529 default:
2530 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2531 }
2532 ShouldNotReachHere();
2533 return NULL;
2534 JVM_END
2535
2536
2537 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2538 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2539 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2540 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2541 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2542 switch (cp->tag_at(cp_index).value()) {
2543 case JVM_CONSTANT_InterfaceMethodref:
2544 case JVM_CONSTANT_Methodref:
2545 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2546 default:
2547 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2548 }
2549 ShouldNotReachHere();
2550 return NULL;
2551 JVM_END
2552
2553
2554 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2555 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2556 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2557 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2558 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2559 switch (cp->tag_at(cp_index).value()) {
2560 case JVM_CONSTANT_Fieldref:
2561 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2562 default:
2563 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2564 }
2565 ShouldNotReachHere();
2566 return NULL;
2567 JVM_END
2568
2569
2570 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2571 JVMWrapper("JVM_GetCPClassNameUTF");
2572 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2573 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2574 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2575 Symbol* classname = cp->klass_name_at(cp_index);
2576 return classname->as_utf8();
2577 JVM_END
2578
2579
2580 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2581 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2582 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2583 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2584 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2585 switch (cp->tag_at(cp_index).value()) {
2586 case JVM_CONSTANT_Fieldref: {
2587 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2588 Symbol* classname = cp->klass_name_at(class_index);
2589 return classname->as_utf8();
2590 }
2591 default:
2592 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2593 }
2594 ShouldNotReachHere();
2595 return NULL;
2596 JVM_END
2597
2598
2599 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2600 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2602 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2603 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2604 switch (cp->tag_at(cp_index).value()) {
2605 case JVM_CONSTANT_Methodref:
2606 case JVM_CONSTANT_InterfaceMethodref: {
2607 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2608 Symbol* classname = cp->klass_name_at(class_index);
2609 return classname->as_utf8();
2610 }
2611 default:
2612 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2613 }
2614 ShouldNotReachHere();
2615 return NULL;
2616 JVM_END
2617
2618
2619 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2620 JVMWrapper("JVM_GetCPFieldModifiers");
2621 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2622 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2623 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2624 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2625 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2626 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2627 switch (cp->tag_at(cp_index).value()) {
2628 case JVM_CONSTANT_Fieldref: {
2629 Symbol* name = cp->uncached_name_ref_at(cp_index);
2630 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2631 InstanceKlass* ik = InstanceKlass::cast(k_called);
2632 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2633 if (fs.name() == name && fs.signature() == signature) {
2634 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2635 }
2636 }
2637 return -1;
2638 }
2639 default:
2640 fatal("JVM_GetCPFieldModifiers: illegal constant");
2641 }
2642 ShouldNotReachHere();
2643 return 0;
2644 JVM_END
2645
2646
2647 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2648 JVMWrapper("JVM_GetCPMethodModifiers");
2649 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2650 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2651 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2652 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2653 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2654 switch (cp->tag_at(cp_index).value()) {
2655 case JVM_CONSTANT_Methodref:
2656 case JVM_CONSTANT_InterfaceMethodref: {
2657 Symbol* name = cp->uncached_name_ref_at(cp_index);
2658 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2659 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2660 int methods_count = methods->length();
2661 for (int i = 0; i < methods_count; i++) {
2662 Method* method = methods->at(i);
2663 if (method->name() == name && method->signature() == signature) {
2664 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2665 }
2666 }
2667 return -1;
2668 }
2669 default:
2670 fatal("JVM_GetCPMethodModifiers: illegal constant");
2671 }
2672 ShouldNotReachHere();
2673 return 0;
2674 JVM_END
2675
2676
2677 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2678
2679 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2680 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2681 JVM_END
2682
2683
2684 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2685 JVMWrapper("JVM_IsSameClassPackage");
2686 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2687 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2688 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2689 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2690 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2691 JVM_END
2692
2693 // Printing support //////////////////////////////////////////////////
2694 extern "C" {
2695
2696 ATTRIBUTE_PRINTF(3, 0)
2697 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2698 // Reject count values that are negative signed values converted to
2699 // unsigned; see bug 4399518, 4417214
2700 if ((intptr_t)count <= 0) return -1;
2701
2702 int result = os::vsnprintf(str, count, fmt, args);
2703 if (result > 0 && (size_t)result >= count) {
2704 result = -1;
2705 }
2706
2707 return result;
2708 }
2709
2710 ATTRIBUTE_PRINTF(3, 4)
2711 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2712 va_list args;
2713 int len;
2714 va_start(args, fmt);
2715 len = jio_vsnprintf(str, count, fmt, args);
2716 va_end(args);
2717 return len;
2718 }
2719
2720 ATTRIBUTE_PRINTF(2, 3)
2721 int jio_fprintf(FILE* f, const char *fmt, ...) {
2722 int len;
2723 va_list args;
2724 va_start(args, fmt);
2725 len = jio_vfprintf(f, fmt, args);
2726 va_end(args);
2727 return len;
2728 }
2729
2730 ATTRIBUTE_PRINTF(2, 0)
2731 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2732 if (Arguments::vfprintf_hook() != NULL) {
2733 return Arguments::vfprintf_hook()(f, fmt, args);
2734 } else {
2735 return vfprintf(f, fmt, args);
2736 }
2737 }
2738
2739 ATTRIBUTE_PRINTF(1, 2)
2740 JNIEXPORT int jio_printf(const char *fmt, ...) {
2741 int len;
2742 va_list args;
2743 va_start(args, fmt);
2744 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2745 va_end(args);
2746 return len;
2747 }
2748
2749 // HotSpot specific jio method
2750 void jio_print(const char* s, size_t len) {
2751 // Try to make this function as atomic as possible.
2752 if (Arguments::vfprintf_hook() != NULL) {
2753 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2754 } else {
2755 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2756 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2757 }
2758 }
2759
2760 } // Extern C
2761
2762 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2763
2764 // In most of the JVM thread support functions we need to access the
2765 // thread through a ThreadsListHandle to prevent it from exiting and
2766 // being reclaimed while we try to operate on it. The exceptions to this
2767 // rule are when operating on the current thread, or if the monitor of
2768 // the target java.lang.Thread is locked at the Java level - in both
2769 // cases the target cannot exit.
2770
2771 static void thread_entry(JavaThread* thread, TRAPS) {
2772 HandleMark hm(THREAD);
2773 Handle obj(THREAD, thread->threadObj());
2774 JavaValue result(T_VOID);
2775 JavaCalls::call_virtual(&result,
2776 obj,
2777 SystemDictionary::Thread_klass(),
2778 vmSymbols::run_method_name(),
2779 vmSymbols::void_method_signature(),
2780 THREAD);
2781 }
2782
2783
2784 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2785 JVMWrapper("JVM_StartThread");
2786 JavaThread *native_thread = NULL;
2787
2788 // We cannot hold the Threads_lock when we throw an exception,
2789 // due to rank ordering issues. Example: we might need to grab the
2790 // Heap_lock while we construct the exception.
2791 bool throw_illegal_thread_state = false;
2792
2793 // We must release the Threads_lock before we can post a jvmti event
2794 // in Thread::start.
2795 {
2796 // Ensure that the C++ Thread and OSThread structures aren't freed before
2797 // we operate.
2798 MutexLocker mu(Threads_lock);
2799
2800 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2801 // re-starting an already started thread, so we should usually find
2802 // that the JavaThread is null. However for a JNI attached thread
2803 // there is a small window between the Thread object being created
2804 // (with its JavaThread set) and the update to its threadStatus, so we
2805 // have to check for this
2806 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2807 throw_illegal_thread_state = true;
2808 } else {
2809 // We could also check the stillborn flag to see if this thread was already stopped, but
2810 // for historical reasons we let the thread detect that itself when it starts running
2811
2812 jlong size =
2813 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2814 // Allocate the C++ Thread structure and create the native thread. The
2815 // stack size retrieved from java is 64-bit signed, but the constructor takes
2816 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2817 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2818 // - Avoid passing negative values which would result in really large stacks.
2819 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2820 size_t sz = size > 0 ? (size_t) size : 0;
2821 native_thread = new JavaThread(&thread_entry, sz);
2822
2823 // At this point it may be possible that no osthread was created for the
2824 // JavaThread due to lack of memory. Check for this situation and throw
2825 // an exception if necessary. Eventually we may want to change this so
2826 // that we only grab the lock if the thread was created successfully -
2827 // then we can also do this check and throw the exception in the
2828 // JavaThread constructor.
2829 if (native_thread->osthread() != NULL) {
2830 // Note: the current thread is not being used within "prepare".
2831 native_thread->prepare(jthread);
2832 }
2833 }
2834 }
2835
2836 if (throw_illegal_thread_state) {
2837 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2838 }
2839
2840 assert(native_thread != NULL, "Starting null thread?");
2841
2842 if (native_thread->osthread() == NULL) {
2843 // No one should hold a reference to the 'native_thread'.
2844 native_thread->smr_delete();
2845 if (JvmtiExport::should_post_resource_exhausted()) {
2846 JvmtiExport::post_resource_exhausted(
2847 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2848 os::native_thread_creation_failed_msg());
2849 }
2850 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2851 os::native_thread_creation_failed_msg());
2852 }
2853
2854 Thread::start(native_thread);
2855
2856 JVM_END
2857
2858
2859 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2860 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2861 // but is thought to be reliable and simple. In the case, where the receiver is the
2862 // same thread as the sender, no VM_Operation is needed.
2863 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2864 JVMWrapper("JVM_StopThread");
2865
2866 // A nested ThreadsListHandle will grab the Threads_lock so create
2867 // tlh before we resolve throwable.
2868 ThreadsListHandle tlh(thread);
2869 oop java_throwable = JNIHandles::resolve(throwable);
2870 if (java_throwable == NULL) {
2871 THROW(vmSymbols::java_lang_NullPointerException());
2872 }
2873 oop java_thread = NULL;
2874 JavaThread* receiver = NULL;
2875 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2876 Events::log_exception(thread,
2877 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2878 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2879
2880 if (is_alive) {
2881 // jthread refers to a live JavaThread.
2882 if (thread == receiver) {
2883 // Exception is getting thrown at self so no VM_Operation needed.
2884 THROW_OOP(java_throwable);
2885 } else {
2886 // Use a VM_Operation to throw the exception.
2887 Thread::send_async_exception(java_thread, java_throwable);
2888 }
2889 } else {
2890 // Either:
2891 // - target thread has not been started before being stopped, or
2892 // - target thread already terminated
2893 // We could read the threadStatus to determine which case it is
2894 // but that is overkill as it doesn't matter. We must set the
2895 // stillborn flag for the first case, and if the thread has already
2896 // exited setting this flag has no effect.
2897 java_lang_Thread::set_stillborn(java_thread);
2898 }
2899 JVM_END
2900
2901
2902 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2903 JVMWrapper("JVM_IsThreadAlive");
2904
2905 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2906 return java_lang_Thread::is_alive(thread_oop);
2907 JVM_END
2908
2909
2910 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2911 JVMWrapper("JVM_SuspendThread");
2912
2913 ThreadsListHandle tlh(thread);
2914 JavaThread* receiver = NULL;
2915 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2916 if (is_alive) {
2917 // jthread refers to a live JavaThread.
2918 {
2919 MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2920 if (receiver->is_external_suspend()) {
2921 // Don't allow nested external suspend requests. We can't return
2922 // an error from this interface so just ignore the problem.
2923 return;
2924 }
2925 if (receiver->is_exiting()) { // thread is in the process of exiting
2926 return;
2927 }
2928 receiver->set_external_suspend();
2929 }
2930
2931 // java_suspend() will catch threads in the process of exiting
2932 // and will ignore them.
2933 receiver->java_suspend();
2934
2935 // It would be nice to have the following assertion in all the
2936 // time, but it is possible for a racing resume request to have
2937 // resumed this thread right after we suspended it. Temporarily
2938 // enable this assertion if you are chasing a different kind of
2939 // bug.
2940 //
2941 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2942 // receiver->is_being_ext_suspended(), "thread is not suspended");
2943 }
2944 JVM_END
2945
2946
2947 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2948 JVMWrapper("JVM_ResumeThread");
2949
2950 ThreadsListHandle tlh(thread);
2951 JavaThread* receiver = NULL;
2952 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2953 if (is_alive) {
2954 // jthread refers to a live JavaThread.
2955
2956 // This is the original comment for this Threads_lock grab:
2957 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2958 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2959 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2960 // looks at it.
2961 //
2962 // The above comment dates back to when we had both internal and
2963 // external suspend APIs that shared a common underlying mechanism.
2964 // External suspend is now entirely cooperative and doesn't share
2965 // anything with internal suspend. That said, there are some
2966 // assumptions in the VM that an external resume grabs the
2967 // Threads_lock. We can't drop the Threads_lock grab here until we
2968 // resolve the assumptions that exist elsewhere.
2969 //
2970 MutexLocker ml(Threads_lock);
2971 receiver->java_resume();
2972 }
2973 JVM_END
2974
2975
2976 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2977 JVMWrapper("JVM_SetThreadPriority");
2978
2979 ThreadsListHandle tlh(thread);
2980 oop java_thread = NULL;
2981 JavaThread* receiver = NULL;
2982 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2983 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2984
2985 if (is_alive) {
2986 // jthread refers to a live JavaThread.
2987 Thread::set_priority(receiver, (ThreadPriority)prio);
2988 }
2989 // Implied else: If the JavaThread hasn't started yet, then the
2990 // priority set in the java.lang.Thread object above will be pushed
2991 // down when it does start.
2992 JVM_END
2993
2994
2995 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2996 JVMWrapper("JVM_Yield");
2997 if (os::dont_yield()) return;
2998 HOTSPOT_THREAD_YIELD();
2999 os::naked_yield();
3000 JVM_END
3001
3002 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3003 assert(event != NULL, "invariant");
3004 assert(event->should_commit(), "invariant");
3005 event->set_time(millis);
3006 event->commit();
3007 }
3008
3009 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3010 JVMWrapper("JVM_Sleep");
3011
3012 if (millis < 0) {
3013 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3014 }
3015
3016 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3017 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3018 }
3019
3020 // Save current thread state and restore it at the end of this block.
3021 // And set new thread state to SLEEPING.
3022 JavaThreadSleepState jtss(thread);
3023
3024 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3025 EventThreadSleep event;
3026
3027 if (millis == 0) {
3028 os::naked_yield();
3029 } else {
3030 ThreadState old_state = thread->osthread()->get_state();
3031 thread->osthread()->set_state(SLEEPING);
3032 if (!thread->sleep(millis)) { // interrupted
3033 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3034 // us while we were sleeping. We do not overwrite those.
3035 if (!HAS_PENDING_EXCEPTION) {
3036 if (event.should_commit()) {
3037 post_thread_sleep_event(&event, millis);
3038 }
3039 HOTSPOT_THREAD_SLEEP_END(1);
3040
3041 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3042 // to properly restore the thread state. That's likely wrong.
3043 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3044 }
3045 }
3046 thread->osthread()->set_state(old_state);
3047 }
3048 if (event.should_commit()) {
3049 post_thread_sleep_event(&event, millis);
3050 }
3051 HOTSPOT_THREAD_SLEEP_END(0);
3052 JVM_END
3053
3054 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3055 JVMWrapper("JVM_CurrentThread");
3056 oop jthread = thread->threadObj();
3057 assert (thread != NULL, "no current thread!");
3058 return JNIHandles::make_local(env, jthread);
3059 JVM_END
3060
3061 class CountStackFramesTC : public ThreadClosure {
3062 int _count;
3063 bool _suspended;
3064 public:
3065 CountStackFramesTC() : _count(0), _suspended(false) {}
3066 virtual void do_thread(Thread* thread) {
3067 JavaThread* jt = (JavaThread*)thread;
3068 if (!jt->is_external_suspend()) {
3069 // To keep same behavior we fail this operation,
3070 // even if it would work perfectly.
3071 return;
3072 }
3073 _suspended = true;
3074 // Count all java activation, i.e., number of vframes.
3075 for (vframeStream vfst(jt); !vfst.at_end(); vfst.next()) {
3076 // Native frames are not counted.
3077 if (!vfst.method()->is_native()) _count++;
3078 }
3079 }
3080 int count() { return _count; }
3081 int suspended() { return _suspended; }
3082 };
3083
3084 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3085 JVMWrapper("JVM_CountStackFrames");
3086
3087 ThreadsListHandle tlh(thread);
3088 JavaThread* receiver = NULL;
3089 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3090 if (is_alive) {
3091 // jthread refers to a live JavaThread.
3092 CountStackFramesTC csf;
3093 Handshake::execute(&csf, receiver);
3094 if (!csf.suspended()) {
3095 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3096 "this thread is not suspended");
3097 }
3098 return csf.count();
3099 }
3100 // Implied else: if JavaThread is not alive simply return a count of 0.
3101 return 0;
3102 JVM_END
3103
3104
3105 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3106 JVMWrapper("JVM_Interrupt");
3107
3108 ThreadsListHandle tlh(thread);
3109 JavaThread* receiver = NULL;
3110 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3111 if (is_alive) {
3112 // jthread refers to a live JavaThread.
3113 receiver->interrupt();
3114 }
3115 JVM_END
3116
3117
3118 JVM_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3119 JVMWrapper("JVM_IsInterrupted");
3120
3121 ThreadsListHandle tlh(thread);
3122 JavaThread* receiver = NULL;
3123 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3124 if (is_alive) {
3125 // jthread refers to a live JavaThread.
3126 return (jboolean) receiver->is_interrupted(clear_interrupted != 0);
3127 } else {
3128 return JNI_FALSE;
3129 }
3130 JVM_END
3131
3132
3133 // Return true iff the current thread has locked the object passed in
3134
3135 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3136 JVMWrapper("JVM_HoldsLock");
3137 assert(THREAD->is_Java_thread(), "sanity check");
3138 if (obj == NULL) {
3139 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3140 }
3141 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3142 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3143 JVM_END
3144
3145
3146 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3147 JVMWrapper("JVM_DumpAllStacks");
3148 VM_PrintThreads op;
3149 VMThread::execute(&op);
3150 if (JvmtiExport::should_post_data_dump()) {
3151 JvmtiExport::post_data_dump();
3152 }
3153 JVM_END
3154
3155 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3156 JVMWrapper("JVM_SetNativeThreadName");
3157
3158 // We don't use a ThreadsListHandle here because the current thread
3159 // must be alive.
3160 oop java_thread = JNIHandles::resolve_non_null(jthread);
3161 JavaThread* thr = java_lang_Thread::thread(java_thread);
3162 if (thread == thr && !thr->has_attached_via_jni()) {
3163 // Thread naming is only supported for the current thread and
3164 // we don't set the name of an attached thread to avoid stepping
3165 // on other programs.
3166 ResourceMark rm(thread);
3167 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3168 os::set_native_thread_name(thread_name);
3169 }
3170 JVM_END
3171
3172 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3173
3174 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3175 JVMWrapper("JVM_GetClassContext");
3176 ResourceMark rm(THREAD);
3177 JvmtiVMObjectAllocEventCollector oam;
3178 vframeStream vfst(thread);
3179
3180 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3181 // This must only be called from SecurityManager.getClassContext
3182 Method* m = vfst.method();
3183 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3184 m->name() == vmSymbols::getClassContext_name() &&
3185 m->signature() == vmSymbols::void_class_array_signature())) {
3186 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3187 }
3188 }
3189
3190 // Collect method holders
3191 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3192 for (; !vfst.at_end(); vfst.security_next()) {
3193 Method* m = vfst.method();
3194 // Native frames are not returned
3195 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3196 Klass* holder = m->method_holder();
3197 assert(holder->is_klass(), "just checking");
3198 klass_array->append(holder);
3199 }
3200 }
3201
3202 // Create result array of type [Ljava/lang/Class;
3203 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3204 // Fill in mirrors corresponding to method holders
3205 for (int i = 0; i < klass_array->length(); i++) {
3206 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3207 }
3208
3209 return (jobjectArray) JNIHandles::make_local(env, result);
3210 JVM_END
3211
3212
3213 // java.lang.Package ////////////////////////////////////////////////////////////////
3214
3215
3216 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3217 JVMWrapper("JVM_GetSystemPackage");
3218 ResourceMark rm(THREAD);
3219 JvmtiVMObjectAllocEventCollector oam;
3220 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3221 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3222 return (jstring) JNIHandles::make_local(result);
3223 JVM_END
3224
3225
3226 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3227 JVMWrapper("JVM_GetSystemPackages");
3228 JvmtiVMObjectAllocEventCollector oam;
3229 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3230 return (jobjectArray) JNIHandles::make_local(result);
3231 JVM_END
3232
3233
3234 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3235
3236
3237 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3238 JVMWrapper("JVM_GetAndClearReferencePendingList");
3239
3240 MonitorLocker ml(Heap_lock);
3241 oop ref = Universe::reference_pending_list();
3242 if (ref != NULL) {
3243 Universe::set_reference_pending_list(NULL);
3244 }
3245 return JNIHandles::make_local(env, ref);
3246 JVM_END
3247
3248 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3249 JVMWrapper("JVM_HasReferencePendingList");
3250 MonitorLocker ml(Heap_lock);
3251 return Universe::has_reference_pending_list();
3252 JVM_END
3253
3254 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3255 JVMWrapper("JVM_WaitForReferencePendingList");
3256 MonitorLocker ml(Heap_lock);
3257 while (!Universe::has_reference_pending_list()) {
3258 ml.wait();
3259 }
3260 JVM_END
3261
3262
3263 // ObjectInputStream ///////////////////////////////////////////////////////////////
3264
3265 // Return the first user-defined class loader up the execution stack, or null
3266 // if only code from the bootstrap or platform class loader is on the stack.
3267
3268 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3269 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3270 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3271 oop loader = vfst.method()->method_holder()->class_loader();
3272 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3273 return JNIHandles::make_local(env, loader);
3274 }
3275 }
3276 return NULL;
3277 JVM_END
3278
3279
3280 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3281
3282
3283 // resolve array handle and check arguments
3284 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3285 if (arr == NULL) {
3286 THROW_0(vmSymbols::java_lang_NullPointerException());
3287 }
3288 oop a = JNIHandles::resolve_non_null(arr);
3289 if (!a->is_array()) {
3290 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3291 } else if (type_array_only && !a->is_typeArray()) {
3292 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3293 }
3294 return arrayOop(a);
3295 }
3296
3297
3298 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3299 JVMWrapper("JVM_GetArrayLength");
3300 arrayOop a = check_array(env, arr, false, CHECK_0);
3301 return a->length();
3302 JVM_END
3303
3304
3305 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3306 JVMWrapper("JVM_Array_Get");
3307 JvmtiVMObjectAllocEventCollector oam;
3308 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3309 jvalue value;
3310 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3311 oop box = Reflection::box(&value, type, CHECK_NULL);
3312 return JNIHandles::make_local(env, box);
3313 JVM_END
3314
3315
3316 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3317 JVMWrapper("JVM_GetPrimitiveArrayElement");
3318 jvalue value;
3319 value.i = 0; // to initialize value before getting used in CHECK
3320 arrayOop a = check_array(env, arr, true, CHECK_(value));
3321 assert(a->is_typeArray(), "just checking");
3322 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3323 BasicType wide_type = (BasicType) wCode;
3324 if (type != wide_type) {
3325 Reflection::widen(&value, type, wide_type, CHECK_(value));
3326 }
3327 return value;
3328 JVM_END
3329
3330
3331 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3332 JVMWrapper("JVM_SetArrayElement");
3333 arrayOop a = check_array(env, arr, false, CHECK);
3334 oop box = JNIHandles::resolve(val);
3335 jvalue value;
3336 value.i = 0; // to initialize value before getting used in CHECK
3337 BasicType value_type;
3338 if (a->is_objArray()) {
3339 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3340 value_type = Reflection::unbox_for_regular_object(box, &value);
3341 } else {
3342 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3343 }
3344 Reflection::array_set(&value, a, index, value_type, CHECK);
3345 JVM_END
3346
3347
3348 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3349 JVMWrapper("JVM_SetPrimitiveArrayElement");
3350 arrayOop a = check_array(env, arr, true, CHECK);
3351 assert(a->is_typeArray(), "just checking");
3352 BasicType value_type = (BasicType) vCode;
3353 Reflection::array_set(&v, a, index, value_type, CHECK);
3354 JVM_END
3355
3356
3357 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3358 JVMWrapper("JVM_NewArray");
3359 JvmtiVMObjectAllocEventCollector oam;
3360 oop element_mirror = JNIHandles::resolve(eltClass);
3361 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3362 return JNIHandles::make_local(env, result);
3363 JVM_END
3364
3365
3366 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3367 JVMWrapper("JVM_NewMultiArray");
3368 JvmtiVMObjectAllocEventCollector oam;
3369 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3370 oop element_mirror = JNIHandles::resolve(eltClass);
3371 assert(dim_array->is_typeArray(), "just checking");
3372 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3373 return JNIHandles::make_local(env, result);
3374 JVM_END
3375
3376
3377 // Library support ///////////////////////////////////////////////////////////////////////////
3378
3379 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3380 //%note jvm_ct
3381 JVMWrapper("JVM_LoadLibrary");
3382 char ebuf[1024];
3383 void *load_result;
3384 {
3385 ThreadToNativeFromVM ttnfvm(thread);
3386 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3387 }
3388 if (load_result == NULL) {
3389 char msg[1024];
3390 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3391 // Since 'ebuf' may contain a string encoded using
3392 // platform encoding scheme, we need to pass
3393 // Exceptions::unsafe_to_utf8 to the new_exception method
3394 // as the last argument. See bug 6367357.
3395 Handle h_exception =
3396 Exceptions::new_exception(thread,
3397 vmSymbols::java_lang_UnsatisfiedLinkError(),
3398 msg, Exceptions::unsafe_to_utf8);
3399
3400 THROW_HANDLE_0(h_exception);
3401 }
3402 return load_result;
3403 JVM_END
3404
3405
3406 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3407 JVMWrapper("JVM_UnloadLibrary");
3408 os::dll_unload(handle);
3409 JVM_END
3410
3411
3412 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3413 JVMWrapper("JVM_FindLibraryEntry");
3414 return os::dll_lookup(handle, name);
3415 JVM_END
3416
3417
3418 // JNI version ///////////////////////////////////////////////////////////////////////////////
3419
3420 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3421 JVMWrapper("JVM_IsSupportedJNIVersion");
3422 return Threads::is_supported_jni_version_including_1_1(version);
3423 JVM_END
3424
3425
3426 // String support ///////////////////////////////////////////////////////////////////////////
3427
3428 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3429 JVMWrapper("JVM_InternString");
3430 JvmtiVMObjectAllocEventCollector oam;
3431 if (str == NULL) return NULL;
3432 oop string = JNIHandles::resolve_non_null(str);
3433 oop result = StringTable::intern(string, CHECK_NULL);
3434 return (jstring) JNIHandles::make_local(env, result);
3435 JVM_END
3436
3437
3438 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3439
3440 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3441 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3442 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3443 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3444 // nature. JavaThreads will be "in native" when using this API from JDK code.
3445
3446
3447 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3448 VM_Exit::block_if_vm_exited();
3449 JVMWrapper("JVM_RawMonitorCreate");
3450 return new os::PlatformMutex();
3451 }
3452
3453
3454 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3455 VM_Exit::block_if_vm_exited();
3456 JVMWrapper("JVM_RawMonitorDestroy");
3457 delete ((os::PlatformMutex*) mon);
3458 }
3459
3460
3461 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3462 VM_Exit::block_if_vm_exited();
3463 JVMWrapper("JVM_RawMonitorEnter");
3464 ((os::PlatformMutex*) mon)->lock();
3465 return 0;
3466 }
3467
3468
3469 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3470 VM_Exit::block_if_vm_exited();
3471 JVMWrapper("JVM_RawMonitorExit");
3472 ((os::PlatformMutex*) mon)->unlock();
3473 }
3474
3475
3476 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3477
3478 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, jboolean link,
3479 Handle loader, Handle protection_domain,
3480 jboolean throwError, TRAPS) {
3481 // Initialization also implies linking - check for coherent args
3482 assert((init && link) || !init, "incorrect use of init/link arguments");
3483
3484 // Security Note:
3485 // The Java level wrapper will perform the necessary security check allowing
3486 // us to pass the NULL as the initiating class loader. The VM is responsible for
3487 // the checkPackageAccess relative to the initiating class loader via the
3488 // protection_domain. The protection_domain is passed as NULL by the java code
3489 // if there is no security manager in 3-arg Class.forName().
3490 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3491
3492 // Check if we should initialize the class (which implies linking), or just link it
3493 if (init && klass->is_instance_klass()) {
3494 klass->initialize(CHECK_NULL);
3495 } else if (link && klass->is_instance_klass()) {
3496 InstanceKlass::cast(klass)->link_class(CHECK_NULL);
3497 }
3498 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3499 }
3500
3501
3502 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3503
3504 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3505 JVMWrapper("JVM_InvokeMethod");
3506 Handle method_handle;
3507 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3508 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3509 Handle receiver(THREAD, JNIHandles::resolve(obj));
3510 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3511 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3512 jobject res = JNIHandles::make_local(env, result);
3513 if (JvmtiExport::should_post_vm_object_alloc()) {
3514 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3515 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3516 if (java_lang_Class::is_primitive(ret_type)) {
3517 // Only for primitive type vm allocates memory for java object.
3518 // See box() method.
3519 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3520 }
3521 }
3522 return res;
3523 } else {
3524 THROW_0(vmSymbols::java_lang_StackOverflowError());
3525 }
3526 JVM_END
3527
3528
3529 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3530 JVMWrapper("JVM_NewInstanceFromConstructor");
3531 oop constructor_mirror = JNIHandles::resolve(c);
3532 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3533 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3534 jobject res = JNIHandles::make_local(env, result);
3535 if (JvmtiExport::should_post_vm_object_alloc()) {
3536 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3537 }
3538 return res;
3539 JVM_END
3540
3541 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3542
3543 JVM_LEAF(jboolean, JVM_SupportsCX8())
3544 JVMWrapper("JVM_SupportsCX8");
3545 return VM_Version::supports_cx8();
3546 JVM_END
3547
3548 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3549 JVMWrapper("JVM_InitializeFromArchive");
3550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3551 assert(k->is_klass(), "just checking");
3552 HeapShared::initialize_from_archived_subgraph(k);
3553 JVM_END
3554
3555 // Returns an array of all live Thread objects (VM internal JavaThreads,
3556 // jvmti agent threads, and JNI attaching threads are skipped)
3557 // See CR 6404306 regarding JNI attaching threads
3558 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3559 ResourceMark rm(THREAD);
3560 ThreadsListEnumerator tle(THREAD, false, false);
3561 JvmtiVMObjectAllocEventCollector oam;
3562
3563 int num_threads = tle.num_threads();
3564 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3565 objArrayHandle threads_ah(THREAD, r);
3566
3567 for (int i = 0; i < num_threads; i++) {
3568 Handle h = tle.get_threadObj(i);
3569 threads_ah->obj_at_put(i, h());
3570 }
3571
3572 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3573 JVM_END
3574
3575
3576 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3577 // Return StackTraceElement[][], each element is the stack trace of a thread in
3578 // the corresponding entry in the given threads array
3579 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3580 JVMWrapper("JVM_DumpThreads");
3581 JvmtiVMObjectAllocEventCollector oam;
3582
3583 // Check if threads is null
3584 if (threads == NULL) {
3585 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3586 }
3587
3588 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3589 objArrayHandle ah(THREAD, a);
3590 int num_threads = ah->length();
3591 // check if threads is non-empty array
3592 if (num_threads == 0) {
3593 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3594 }
3595
3596 // check if threads is not an array of objects of Thread class
3597 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3598 if (k != SystemDictionary::Thread_klass()) {
3599 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3600 }
3601
3602 ResourceMark rm(THREAD);
3603
3604 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3605 for (int i = 0; i < num_threads; i++) {
3606 oop thread_obj = ah->obj_at(i);
3607 instanceHandle h(THREAD, (instanceOop) thread_obj);
3608 thread_handle_array->append(h);
3609 }
3610
3611 // The JavaThread references in thread_handle_array are validated
3612 // in VM_ThreadDump::doit().
3613 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3614 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3615
3616 JVM_END
3617
3618 // JVM monitoring and management support
3619 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3620 return Management::get_jmm_interface(version);
3621 JVM_END
3622
3623 // com.sun.tools.attach.VirtualMachine agent properties support
3624 //
3625 // Initialize the agent properties with the properties maintained in the VM
3626 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3627 JVMWrapper("JVM_InitAgentProperties");
3628 ResourceMark rm;
3629
3630 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3631
3632 PUTPROP(props, "sun.java.command", Arguments::java_command());
3633 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3634 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3635 return properties;
3636 JVM_END
3637
3638 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3639 {
3640 JVMWrapper("JVM_GetEnclosingMethodInfo");
3641 JvmtiVMObjectAllocEventCollector oam;
3642
3643 if (ofClass == NULL) {
3644 return NULL;
3645 }
3646 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3647 // Special handling for primitive objects
3648 if (java_lang_Class::is_primitive(mirror())) {
3649 return NULL;
3650 }
3651 Klass* k = java_lang_Class::as_Klass(mirror());
3652 if (!k->is_instance_klass()) {
3653 return NULL;
3654 }
3655 InstanceKlass* ik = InstanceKlass::cast(k);
3656 int encl_method_class_idx = ik->enclosing_method_class_index();
3657 if (encl_method_class_idx == 0) {
3658 return NULL;
3659 }
3660 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3661 objArrayHandle dest(THREAD, dest_o);
3662 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3663 dest->obj_at_put(0, enc_k->java_mirror());
3664 int encl_method_method_idx = ik->enclosing_method_method_index();
3665 if (encl_method_method_idx != 0) {
3666 Symbol* sym = ik->constants()->symbol_at(
3667 extract_low_short_from_int(
3668 ik->constants()->name_and_type_at(encl_method_method_idx)));
3669 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3670 dest->obj_at_put(1, str());
3671 sym = ik->constants()->symbol_at(
3672 extract_high_short_from_int(
3673 ik->constants()->name_and_type_at(encl_method_method_idx)));
3674 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3675 dest->obj_at_put(2, str());
3676 }
3677 return (jobjectArray) JNIHandles::make_local(dest());
3678 }
3679 JVM_END
3680
3681 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3682 {
3683 memset(info, 0, info_size);
3684
3685 info->jvm_version = VM_Version::jvm_version();
3686 info->patch_version = VM_Version::vm_patch_version();
3687
3688 // when we add a new capability in the jvm_version_info struct, we should also
3689 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3690 // counter defined in runtimeService.cpp.
3691 info->is_attach_supported = AttachListener::is_attach_supported();
3692 }
3693 JVM_END
3694
3695 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3696 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3697 ResourceMark rm(THREAD);
3698
3699 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3700 return NULL;
3701 }
3702
3703 char** vm_flags = Arguments::jvm_flags_array();
3704 char** vm_args = Arguments::jvm_args_array();
3705 int num_flags = Arguments::num_jvm_flags();
3706 int num_args = Arguments::num_jvm_args();
3707
3708 InstanceKlass* ik = SystemDictionary::String_klass();
3709 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3710 objArrayHandle result_h(THREAD, r);
3711
3712 int index = 0;
3713 for (int j = 0; j < num_flags; j++, index++) {
3714 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3715 result_h->obj_at_put(index, h());
3716 }
3717 for (int i = 0; i < num_args; i++, index++) {
3718 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3719 result_h->obj_at_put(index, h());
3720 }
3721 return (jobjectArray) JNIHandles::make_local(env, result_h());
3722 JVM_END
3723
3724 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3725 return os::get_signal_number(name);
3726 JVM_END