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