1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/javaAssertions.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/stringTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/vmSymbols.hpp"
38 #include "gc/shared/collectedHeap.inline.hpp"
39 #include "interpreter/bytecode.hpp"
40 #include "jfr/jfrEvents.hpp"
41 #include "logging/log.hpp"
42 #include "memory/heapShared.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/referenceType.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/access.inline.hpp"
48 #include "oops/fieldStreams.hpp"
49 #include "oops/instanceKlass.hpp"
50 #include "oops/method.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "prims/jvm_misc.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/jvmtiThreadState.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "prims/stackwalk.hpp"
59 #include "runtime/arguments.hpp"
60 #include "runtime/atomic.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/init.hpp"
63 #include "runtime/interfaceSupport.inline.hpp"
64 #include "runtime/deoptimization.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/jniHandles.inline.hpp"
69 #include "runtime/orderAccess.hpp"
70 #include "runtime/os.inline.hpp"
71 #include "runtime/perfData.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/thread.inline.hpp"
74 #include "runtime/threadSMR.hpp"
75 #include "runtime/vframe.inline.hpp"
76 #include "runtime/vmOperations.hpp"
77 #include "runtime/vm_version.hpp"
78 #include "services/attachListener.hpp"
79 #include "services/management.hpp"
80 #include "services/threadService.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/defaultStream.hpp"
83 #include "utilities/dtrace.hpp"
84 #include "utilities/events.hpp"
85 #include "utilities/histogram.hpp"
86 #include "utilities/macros.hpp"
87 #include "utilities/utf8.hpp"
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91
92 #include <errno.h>
93
94 /*
95 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
96 such ctors and calls MUST NOT come between an oop declaration/init and its
97 usage because if objects are move this may cause various memory stomps, bus
98 errors and segfaults. Here is a cookbook for causing so called "naked oop
99 failures":
100
101 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
102 JVMWrapper("JVM_GetClassDeclaredFields");
103
104 // Object address to be held directly in mirror & not visible to GC
105 oop mirror = JNIHandles::resolve_non_null(ofClass);
106
107 // If this ctor can hit a safepoint, moving objects around, then
108 ComplexConstructor foo;
109
110 // Boom! mirror may point to JUNK instead of the intended object
111 (some dereference of mirror)
112
113 // Here's another call that may block for GC, making mirror stale
114 MutexLocker ml(some_lock);
115
116 // And here's an initializer that can result in a stale oop
117 // all in one step.
118 oop o = call_that_can_throw_exception(TRAPS);
119
120
121 The solution is to keep the oop declaration BELOW the ctor or function
122 call that might cause a GC, do another resolve to reassign the oop, or
123 consider use of a Handle instead of an oop so there is immunity from object
124 motion. But note that the "QUICK" entries below do not have a handlemark
125 and thus can only support use of handles passed in.
126 */
127
128 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
129 ResourceMark rm;
130 int line_number = -1;
131 const char * source_file = NULL;
132 const char * trace = "explicit";
133 InstanceKlass* caller = NULL;
134 JavaThread* jthread = JavaThread::current();
135 if (jthread->has_last_Java_frame()) {
136 vframeStream vfst(jthread);
137
138 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
139 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
140 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
141 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
142 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
143
144 Method* last_caller = NULL;
145
146 while (!vfst.at_end()) {
147 Method* m = vfst.method();
148 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
149 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
150 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
151 break;
152 }
153 last_caller = m;
154 vfst.next();
155 }
156 // if this is called from Class.forName0 and that is called from Class.forName,
157 // then print the caller of Class.forName. If this is Class.loadClass, then print
158 // that caller, otherwise keep quiet since this should be picked up elsewhere.
159 bool found_it = false;
160 if (!vfst.at_end() &&
161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName0_name()) {
163 vfst.next();
164 if (!vfst.at_end() &&
165 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
166 vfst.method()->name() == vmSymbols::forName_name()) {
167 vfst.next();
168 found_it = true;
169 }
170 } else if (last_caller != NULL &&
171 last_caller->method_holder()->name() ==
172 vmSymbols::java_lang_ClassLoader() &&
173 last_caller->name() == vmSymbols::loadClass_name()) {
174 found_it = true;
175 } else if (!vfst.at_end()) {
176 if (vfst.method()->is_native()) {
177 // JNI call
178 found_it = true;
179 }
180 }
181 if (found_it && !vfst.at_end()) {
182 // found the caller
183 caller = vfst.method()->method_holder();
184 line_number = vfst.method()->line_number_from_bci(vfst.bci());
185 if (line_number == -1) {
186 // show method name if it's a native method
187 trace = vfst.method()->name_and_sig_as_C_string();
188 }
189 Symbol* s = caller->source_file_name();
190 if (s != NULL) {
191 source_file = s->as_C_string();
192 }
193 }
194 }
195 if (caller != NULL) {
196 if (to_class != caller) {
197 const char * from = caller->external_name();
198 const char * to = to_class->external_name();
199 // print in a single call to reduce interleaving between threads
200 if (source_file != NULL) {
201 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
202 } else {
203 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
204 }
205 }
206 }
207 }
208
209 void trace_class_resolution(Klass* to_class) {
210 EXCEPTION_MARK;
211 trace_class_resolution_impl(to_class, THREAD);
212 if (HAS_PENDING_EXCEPTION) {
213 CLEAR_PENDING_EXCEPTION;
214 }
215 }
216
217 // Wrapper to trace JVM functions
218
219 #ifdef ASSERT
220 Histogram* JVMHistogram;
221 volatile int JVMHistogram_lock = 0;
222
223 class JVMHistogramElement : public HistogramElement {
224 public:
225 JVMHistogramElement(const char* name);
226 };
227
228 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
229 _name = elementName;
230 uintx count = 0;
231
232 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
233 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
234 count +=1;
235 if ( (WarnOnStalledSpinLock > 0)
236 && (count % WarnOnStalledSpinLock == 0)) {
237 warning("JVMHistogram_lock seems to be stalled");
238 }
239 }
240 }
241
242 if(JVMHistogram == NULL)
243 JVMHistogram = new Histogram("JVM Call Counts",100);
244
245 JVMHistogram->add_element(this);
246 Atomic::dec(&JVMHistogram_lock);
247 }
248
249 #define JVMCountWrapper(arg) \
250 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
251 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
252
253 #define JVMWrapper(arg) JVMCountWrapper(arg);
254 #else
255 #define JVMWrapper(arg)
256 #endif
257
258
259 // Interface version /////////////////////////////////////////////////////////////////////
260
261
262 JVM_LEAF(jint, JVM_GetInterfaceVersion())
263 return JVM_INTERFACE_VERSION;
264 JVM_END
265
266
267 // java.lang.System //////////////////////////////////////////////////////////////////////
268
269
270 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
271 JVMWrapper("JVM_CurrentTimeMillis");
272 return os::javaTimeMillis();
273 JVM_END
274
275 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
276 JVMWrapper("JVM_NanoTime");
277 return os::javaTimeNanos();
278 JVM_END
279
280 // The function below is actually exposed by jdk.internal.misc.VM and not
281 // java.lang.System, but we choose to keep it here so that it stays next
282 // to JVM_CurrentTimeMillis and JVM_NanoTime
283
284 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
285 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
286
287 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
288 JVMWrapper("JVM_GetNanoTimeAdjustment");
289 jlong seconds;
290 jlong nanos;
291
292 os::javaTimeSystemUTC(seconds, nanos);
293
294 // We're going to verify that the result can fit in a long.
295 // For that we need the difference in seconds between 'seconds'
296 // and 'offset_secs' to be such that:
297 // |seconds - offset_secs| < (2^63/10^9)
298 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
299 // which makes |seconds - offset_secs| < 2^33
300 // and we will prefer +/- 2^32 as the maximum acceptable diff
301 // as 2^32 has a more natural feel than 2^33...
302 //
303 // So if |seconds - offset_secs| >= 2^32 - we return a special
304 // sentinel value (-1) which the caller should take as an
305 // exception value indicating that the offset given to us is
306 // too far from range of the current time - leading to too big
307 // a nano adjustment. The caller is expected to recover by
308 // computing a more accurate offset and calling this method
309 // again. (For the record 2^32 secs is ~136 years, so that
310 // should rarely happen)
311 //
312 jlong diff = seconds - offset_secs;
313 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
314 return -1; // sentinel value: the offset is too far off the target
315 }
316
317 // return the adjustment. If you compute a time by adding
318 // this number of nanoseconds along with the number of seconds
319 // in the offset you should get the current UTC time.
320 return (diff * (jlong)1000000000) + nanos;
321 JVM_END
322
323 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
324 jobject dst, jint dst_pos, jint length))
325 JVMWrapper("JVM_ArrayCopy");
326 // Check if we have null pointers
327 if (src == NULL || dst == NULL) {
328 THROW(vmSymbols::java_lang_NullPointerException());
329 }
330 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
331 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
332 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
333 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
334 // Do copy
335 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
336 JVM_END
337
338
339 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
340 JavaValue r(T_OBJECT);
341 // public synchronized Object put(Object key, Object value);
342 HandleMark hm(THREAD);
343 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
344 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
345 JavaCalls::call_virtual(&r,
346 props,
347 SystemDictionary::Properties_klass(),
348 vmSymbols::put_name(),
349 vmSymbols::object_object_object_signature(),
350 key_str,
351 value_str,
352 THREAD);
353 }
354
355
356 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
357
358 /*
359 * Return all of the system properties in a Java String array with alternating
360 * names and values from the jvm SystemProperty.
361 * Which includes some internal and all commandline -D defined properties.
362 */
363 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
364 JVMWrapper("JVM_GetProperties");
365 ResourceMark rm(THREAD);
366 HandleMark hm(THREAD);
367 int ndx = 0;
368 int fixedCount = 2;
369
370 SystemProperty* p = Arguments::system_properties();
371 int count = Arguments::PropertyList_count(p);
372
373 // Allocate result String array
374 InstanceKlass* ik = SystemDictionary::String_klass();
375 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
376 objArrayHandle result_h(THREAD, r);
377
378 while (p != NULL) {
379 const char * key = p->key();
380 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
381 const char * value = p->value();
382 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
383 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
384 result_h->obj_at_put(ndx * 2, key_str());
385 result_h->obj_at_put(ndx * 2 + 1, value_str());
386 ndx++;
387 }
388 p = p->next();
389 }
390
391 // Convert the -XX:MaxDirectMemorySize= command line flag
392 // to the sun.nio.MaxDirectMemorySize property.
393 // Do this after setting user properties to prevent people
394 // from setting the value with a -D option, as requested.
395 // Leave empty if not supplied
396 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
397 char as_chars[256];
398 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
399 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
400 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
401 result_h->obj_at_put(ndx * 2, key_str());
402 result_h->obj_at_put(ndx * 2 + 1, value_str());
403 ndx++;
404 }
405
406 // JVM monitoring and management support
407 // Add the sun.management.compiler property for the compiler's name
408 {
409 #undef CSIZE
410 #if defined(_LP64) || defined(_WIN64)
411 #define CSIZE "64-Bit "
412 #else
413 #define CSIZE
414 #endif // 64bit
415
416 #ifdef TIERED
417 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
418 #else
419 #if defined(COMPILER1)
420 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
421 #elif defined(COMPILER2)
422 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
423 #elif INCLUDE_JVMCI
424 #error "INCLUDE_JVMCI should imply TIERED"
425 #else
426 const char* compiler_name = "";
427 #endif // compilers
428 #endif // TIERED
429
430 if (*compiler_name != '\0' &&
431 (Arguments::mode() != Arguments::_int)) {
432 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
433 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
434 result_h->obj_at_put(ndx * 2, key_str());
435 result_h->obj_at_put(ndx * 2 + 1, value_str());
436 ndx++;
437 }
438 }
439
440 return (jobjectArray) JNIHandles::make_local(env, result_h());
441 JVM_END
442
443
444 /*
445 * Return the temporary directory that the VM uses for the attach
446 * and perf data files.
447 *
448 * It is important that this directory is well-known and the
449 * same for all VM instances. It cannot be affected by configuration
450 * variables such as java.io.tmpdir.
451 */
452 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
453 JVMWrapper("JVM_GetTemporaryDirectory");
454 HandleMark hm(THREAD);
455 const char* temp_dir = os::get_temp_directory();
456 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
457 return (jstring) JNIHandles::make_local(env, h());
458 JVM_END
459
460
461 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
462
463 extern volatile jint vm_created;
464
465 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
466 JVMWrapper("JVM_BeforeHalt");
467 EventShutdown event;
468 if (event.should_commit()) {
469 event.set_reason("Shutdown requested from Java");
470 event.commit();
471 }
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
476 before_exit(thread);
477 vm_exit(code);
478 JVM_END
479
480
481 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
482 JVMWrapper("JVM_GC");
483 if (!DisableExplicitGC) {
484 Universe::heap()->collect(GCCause::_java_lang_system_gc);
485 }
486 JVM_END
487
488
489 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
490 JVMWrapper("JVM_MaxObjectInspectionAge");
491 return Universe::heap()->millis_since_last_gc();
492 JVM_END
493
494
495 static inline jlong convert_size_t_to_jlong(size_t val) {
496 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
497 NOT_LP64 (return (jlong)val;)
498 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
499 }
500
501 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
502 JVMWrapper("JVM_TotalMemory");
503 size_t n = Universe::heap()->capacity();
504 return convert_size_t_to_jlong(n);
505 JVM_END
506
507
508 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
509 JVMWrapper("JVM_FreeMemory");
510 CollectedHeap* ch = Universe::heap();
511 size_t n;
512 {
513 MutexLocker x(Heap_lock);
514 n = ch->capacity() - ch->used();
515 }
516 return convert_size_t_to_jlong(n);
517 JVM_END
518
519
520 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
521 JVMWrapper("JVM_MaxMemory");
522 size_t n = Universe::heap()->max_capacity();
523 return convert_size_t_to_jlong(n);
524 JVM_END
525
526
527 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
528 JVMWrapper("JVM_ActiveProcessorCount");
529 return os::active_processor_count();
530 JVM_END
531
532
533
534 // java.lang.Throwable //////////////////////////////////////////////////////
535
536
537 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
538 JVMWrapper("JVM_FillInStackTrace");
539 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
540 java_lang_Throwable::fill_in_stack_trace(exception);
541 JVM_END
542
543
544 // java.lang.StackTraceElement //////////////////////////////////////////////
545
546
547 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
548 JVMWrapper("JVM_InitStackTraceElementArray");
549 Handle exception(THREAD, JNIHandles::resolve(throwable));
550 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
551 objArrayHandle stack_trace(THREAD, st);
552 // Fill in the allocated stack trace
553 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
558 JVMWrapper("JVM_InitStackTraceElement");
559 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
560 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
561 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
562 JVM_END
563
564
565 // java.lang.StackWalker //////////////////////////////////////////////////////
566
567
568 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
569 jint skip_frames, jint frame_count, jint start_index,
570 jobjectArray frames))
571 JVMWrapper("JVM_CallStackWalk");
572 JavaThread* jt = (JavaThread*) THREAD;
573 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
574 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
575 }
576
577 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
578
579 // frames array is a Class<?>[] array when only getting caller reference,
580 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
581 // be null.
582 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
583 objArrayHandle frames_array_h(THREAD, fa);
584
585 int limit = start_index + frame_count;
586 if (frames_array_h->length() < limit) {
587 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
588 }
589
590 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
591 start_index, frames_array_h, CHECK_NULL);
592 return JNIHandles::make_local(env, result);
593 JVM_END
594
595
596 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
597 jint frame_count, jint start_index,
598 jobjectArray frames))
599 JVMWrapper("JVM_MoreStackWalk");
600 JavaThread* jt = (JavaThread*) THREAD;
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_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
611 }
612
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
615 start_index, frames_array_h, THREAD);
616 JVM_END
617
618 // java.lang.Object ///////////////////////////////////////////////
619
620
621 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
622 JVMWrapper("JVM_IHashCode");
623 // as implemented in the classic virtual machine; return 0 if object is NULL
624 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
625 JVM_END
626
627
628 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
629 JVMWrapper("JVM_MonitorWait");
630 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
631 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
632 if (JvmtiExport::should_post_monitor_wait()) {
633 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
634
635 // The current thread already owns the monitor and it has not yet
636 // been added to the wait queue so the current thread cannot be
637 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
638 // event handler cannot accidentally consume an unpark() meant for
639 // the ParkEvent associated with this ObjectMonitor.
640 }
641 ObjectSynchronizer::wait(obj, ms, CHECK);
642 JVM_END
643
644
645 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
646 JVMWrapper("JVM_MonitorNotify");
647 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
648 ObjectSynchronizer::notify(obj, CHECK);
649 JVM_END
650
651
652 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
653 JVMWrapper("JVM_MonitorNotifyAll");
654 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
655 ObjectSynchronizer::notifyall(obj, CHECK);
656 JVM_END
657
658
659 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
660 JVMWrapper("JVM_Clone");
661 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
662 Klass* klass = obj->klass();
663 JvmtiVMObjectAllocEventCollector oam;
664
665 #ifdef ASSERT
666 // Just checking that the cloneable flag is set correct
667 if (obj->is_array()) {
668 guarantee(klass->is_cloneable(), "all arrays are cloneable");
669 } else {
670 guarantee(obj->is_instance(), "should be instanceOop");
671 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
672 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
673 }
674 #endif
675
676 // Check if class of obj supports the Cloneable interface.
677 // All arrays are considered to be cloneable (See JLS 20.1.5).
678 // All j.l.r.Reference classes are considered non-cloneable.
679 if (!klass->is_cloneable() ||
680 (klass->is_instance_klass() &&
681 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
682 ResourceMark rm(THREAD);
683 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
684 }
685
686 // Make shallow object copy
687 const int size = obj->size();
688 oop new_obj_oop = NULL;
689 if (obj->is_array()) {
690 const int length = ((arrayOop)obj())->length();
691 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
692 /* do_zero */ true, CHECK_NULL);
693 } else {
694 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
695 }
696
697 HeapAccess<>::clone(obj(), new_obj_oop, size);
698
699 Handle new_obj(THREAD, new_obj_oop);
700 // Caution: this involves a java upcall, so the clone should be
701 // "gc-robust" by this stage.
702 if (klass->has_finalizer()) {
703 assert(obj->is_instance(), "should be instanceOop");
704 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
705 new_obj = Handle(THREAD, new_obj_oop);
706 }
707
708 return JNIHandles::make_local(env, new_obj());
709 JVM_END
710
711 // java.io.File ///////////////////////////////////////////////////////////////
712
713 JVM_LEAF(char*, JVM_NativePath(char* path))
714 JVMWrapper("JVM_NativePath");
715 return os::native_path(path);
716 JVM_END
717
718
719 // Misc. class handling ///////////////////////////////////////////////////////////
720
721
722 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
723 JVMWrapper("JVM_GetCallerClass");
724
725 // Getting the class of the caller frame.
726 //
727 // The call stack at this point looks something like this:
728 //
729 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
730 // [1] [ @CallerSensitive API.method ]
731 // [.] [ (skipped intermediate frames) ]
732 // [n] [ caller ]
733 vframeStream vfst(thread);
734 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
735 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
736 Method* m = vfst.method();
737 assert(m != NULL, "sanity");
738 switch (n) {
739 case 0:
740 // This must only be called from Reflection.getCallerClass
741 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
742 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
743 }
744 // fall-through
745 case 1:
746 // Frame 0 and 1 must be caller sensitive.
747 if (!m->caller_sensitive()) {
748 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
749 }
750 break;
751 default:
752 if (!m->is_ignored_by_security_stack_walk()) {
753 // We have reached the desired frame; return the holder class.
754 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
755 }
756 break;
757 }
758 }
759 return NULL;
760 JVM_END
761
762
763 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
764 JVMWrapper("JVM_FindPrimitiveClass");
765 oop mirror = NULL;
766 BasicType t = name2type(utf);
767 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
768 mirror = Universe::java_mirror(t);
769 }
770 if (mirror == NULL) {
771 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
772 } else {
773 return (jclass) JNIHandles::make_local(env, mirror);
774 }
775 JVM_END
776
777
778 // Returns a class loaded by the bootstrap class loader; or null
779 // if not found. ClassNotFoundException is not thrown.
780 // FindClassFromBootLoader is exported to the launcher for windows.
781 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
782 const char* name))
783 JVMWrapper("JVM_FindClassFromBootLoader");
784
785 // Java libraries should ensure that name is never null...
786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
787 // It's impossible to create this class; the name cannot fit
788 // into the constant pool.
789 return NULL;
790 }
791
792 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
793 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
794 if (k == NULL) {
795 return NULL;
796 }
797
798 if (log_is_enabled(Debug, class, resolve)) {
799 trace_class_resolution(k);
800 }
801 return (jclass) JNIHandles::make_local(env, k->java_mirror());
802 JVM_END
803
804 // Find a class with this name in this loader, using the caller's protection domain.
805 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
806 jboolean init, jobject loader,
807 jclass caller))
808 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
809 // Java libraries should ensure that name is never null...
810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
811 // It's impossible to create this class; the name cannot fit
812 // into the constant pool.
813 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
814 }
815
816 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
817
818 oop loader_oop = JNIHandles::resolve(loader);
819 oop from_class = JNIHandles::resolve(caller);
820 oop protection_domain = NULL;
821 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
822 // NPE. Put it in another way, the bootstrap class loader has all permission and
823 // thus no checkPackageAccess equivalence in the VM class loader.
824 // The caller is also passed as NULL by the java code if there is no security
825 // manager to avoid the performance cost of getting the calling class.
826 if (from_class != NULL && loader_oop != NULL) {
827 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
828 }
829
830 Handle h_loader(THREAD, loader_oop);
831 Handle h_prot(THREAD, protection_domain);
832 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
833 h_prot, false, THREAD);
834
835 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
836 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
837 }
838 return result;
839 JVM_END
840
841 // Currently only called from the old verifier.
842 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
843 jboolean init, jclass from))
844 JVMWrapper("JVM_FindClassFromClass");
845 if (name == NULL) {
846 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
847 }
848 if ((int)strlen(name) > Symbol::max_length()) {
849 // It's impossible to create this class; the name cannot fit
850 // into the constant pool.
851 Exceptions::fthrow(THREAD_AND_LOCATION,
852 vmSymbols::java_lang_NoClassDefFoundError(),
853 "Class name exceeds maximum length of %d: %s",
854 Symbol::max_length(),
855 name);
856 return 0;
857 }
858 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
859 oop from_class_oop = JNIHandles::resolve(from);
860 Klass* from_class = (from_class_oop == NULL)
861 ? (Klass*)NULL
862 : java_lang_Class::as_Klass(from_class_oop);
863 oop class_loader = NULL;
864 oop protection_domain = NULL;
865 if (from_class != NULL) {
866 class_loader = from_class->class_loader();
867 protection_domain = from_class->protection_domain();
868 }
869 Handle h_loader(THREAD, class_loader);
870 Handle h_prot (THREAD, protection_domain);
871 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
872 h_prot, true, thread);
873
874 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
875 // this function is generally only used for class loading during verification.
876 ResourceMark rm;
877 oop from_mirror = JNIHandles::resolve_non_null(from);
878 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
879 const char * from_name = from_class->external_name();
880
881 oop mirror = JNIHandles::resolve_non_null(result);
882 Klass* to_class = java_lang_Class::as_Klass(mirror);
883 const char * to = to_class->external_name();
884 log_debug(class, resolve)("%s %s (verification)", from_name, to);
885 }
886
887 return result;
888 JVM_END
889
890 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
891 if (loader.is_null()) {
892 return;
893 }
894
895 // check whether the current caller thread holds the lock or not.
896 // If not, increment the corresponding counter
897 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
898 ObjectSynchronizer::owner_self) {
899 counter->inc();
900 }
901 }
902
903 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
904 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
905 jobject loader, const jbyte *buf,
906 jsize len, jobject pd, const char *source,
907 TRAPS) {
908 if (source == NULL) source = "__JVM_DefineClass__";
909
910 assert(THREAD->is_Java_thread(), "must be a JavaThread");
911 JavaThread* jt = (JavaThread*) THREAD;
912
913 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
914 ClassLoader::perf_define_appclass_selftime(),
915 ClassLoader::perf_define_appclasses(),
916 jt->get_thread_stat()->perf_recursion_counts_addr(),
917 jt->get_thread_stat()->perf_timers_addr(),
918 PerfClassTraceTime::DEFINE_CLASS);
919
920 if (UsePerfData) {
921 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
922 }
923
924 // Since exceptions can be thrown, class initialization can take place
925 // if name is NULL no check for class name in .class stream has to be made.
926 TempNewSymbol class_name = NULL;
927 if (name != NULL) {
928 const int str_len = (int)strlen(name);
929 if (str_len > Symbol::max_length()) {
930 // It's impossible to create this class; the name cannot fit
931 // into the constant pool.
932 Exceptions::fthrow(THREAD_AND_LOCATION,
933 vmSymbols::java_lang_NoClassDefFoundError(),
934 "Class name exceeds maximum length of %d: %s",
935 Symbol::max_length(),
936 name);
937 return 0;
938 }
939 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
940 }
941
942 ResourceMark rm(THREAD);
943 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
944 Handle class_loader (THREAD, JNIHandles::resolve(loader));
945 if (UsePerfData) {
946 is_lock_held_by_thread(class_loader,
947 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
948 THREAD);
949 }
950 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
951 Klass* k = SystemDictionary::resolve_from_stream(class_name,
952 class_loader,
953 protection_domain,
954 &st,
955 CHECK_NULL);
956
957 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
958 trace_class_resolution(k);
959 }
960
961 return (jclass) JNIHandles::make_local(env, k->java_mirror());
962 }
963
964
965 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
966 JVMWrapper("JVM_DefineClass");
967
968 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
969 JVM_END
970
971
972 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
973 JVMWrapper("JVM_DefineClassWithSource");
974
975 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
976 JVM_END
977
978 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
979 JVMWrapper("JVM_FindLoadedClass");
980 ResourceMark rm(THREAD);
981
982 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
983 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
984
985 const char* str = java_lang_String::as_utf8_string(string());
986 // Sanity check, don't expect null
987 if (str == NULL) return NULL;
988
989 const int str_len = (int)strlen(str);
990 if (str_len > Symbol::max_length()) {
991 // It's impossible to create this class; the name cannot fit
992 // into the constant pool.
993 return NULL;
994 }
995 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
996
997 // Security Note:
998 // The Java level wrapper will perform the necessary security check allowing
999 // us to pass the NULL as the initiating class loader.
1000 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1001 if (UsePerfData) {
1002 is_lock_held_by_thread(h_loader,
1003 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1004 THREAD);
1005 }
1006
1007 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1008 h_loader,
1009 Handle(),
1010 CHECK_NULL);
1011 #if INCLUDE_CDS
1012 if (k == NULL) {
1013 // If the class is not already loaded, try to see if it's in the shared
1014 // archive for the current classloader (h_loader).
1015 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1016 }
1017 #endif
1018 return (k == NULL) ? NULL :
1019 (jclass) JNIHandles::make_local(env, k->java_mirror());
1020 JVM_END
1021
1022 // Module support //////////////////////////////////////////////////////////////////////////////
1023
1024 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1025 jstring location, const char* const* packages, jsize num_packages))
1026 JVMWrapper("JVM_DefineModule");
1027 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1028 JVM_END
1029
1030 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1031 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1032 Modules::set_bootloader_unnamed_module(module, CHECK);
1033 JVM_END
1034
1035 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1036 JVMWrapper("JVM_AddModuleExports");
1037 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1038 JVM_END
1039
1040 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1041 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1042 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1043 JVM_END
1044
1045 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1046 JVMWrapper("JVM_AddModuleExportsToAll");
1047 Modules::add_module_exports(from_module, package, NULL, CHECK);
1048 JVM_END
1049
1050 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1051 JVMWrapper("JVM_AddReadsModule");
1052 Modules::add_reads_module(from_module, source_module, CHECK);
1053 JVM_END
1054
1055 // Reflection support //////////////////////////////////////////////////////////////////////////////
1056
1057 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1058 assert (cls != NULL, "illegal class");
1059 JVMWrapper("JVM_InitClassName");
1060 JvmtiVMObjectAllocEventCollector oam;
1061 ResourceMark rm(THREAD);
1062 HandleMark hm(THREAD);
1063 Handle java_class(THREAD, JNIHandles::resolve(cls));
1064 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1065 return (jstring) JNIHandles::make_local(env, result);
1066 JVM_END
1067
1068
1069 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1070 JVMWrapper("JVM_GetClassInterfaces");
1071 JvmtiVMObjectAllocEventCollector oam;
1072 oop mirror = JNIHandles::resolve_non_null(cls);
1073
1074 // Special handling for primitive objects
1075 if (java_lang_Class::is_primitive(mirror)) {
1076 // Primitive objects does not have any interfaces
1077 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1078 return (jobjectArray) JNIHandles::make_local(env, r);
1079 }
1080
1081 Klass* klass = java_lang_Class::as_Klass(mirror);
1082 // Figure size of result array
1083 int size;
1084 if (klass->is_instance_klass()) {
1085 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1086 } else {
1087 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1088 size = 2;
1089 }
1090
1091 // Allocate result array
1092 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1093 objArrayHandle result (THREAD, r);
1094 // Fill in result
1095 if (klass->is_instance_klass()) {
1096 // Regular instance klass, fill in all local interfaces
1097 for (int index = 0; index < size; index++) {
1098 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1099 result->obj_at_put(index, k->java_mirror());
1100 }
1101 } else {
1102 // All arrays implement java.lang.Cloneable and java.io.Serializable
1103 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1104 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1105 }
1106 return (jobjectArray) JNIHandles::make_local(env, result());
1107 JVM_END
1108
1109
1110 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1111 JVMWrapper("JVM_IsInterface");
1112 oop mirror = JNIHandles::resolve_non_null(cls);
1113 if (java_lang_Class::is_primitive(mirror)) {
1114 return JNI_FALSE;
1115 }
1116 Klass* k = java_lang_Class::as_Klass(mirror);
1117 jboolean result = k->is_interface();
1118 assert(!result || k->is_instance_klass(),
1119 "all interfaces are instance types");
1120 // The compiler intrinsic for isInterface tests the
1121 // Klass::_access_flags bits in the same way.
1122 return result;
1123 JVM_END
1124
1125
1126 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1127 JVMWrapper("JVM_GetClassSigners");
1128 JvmtiVMObjectAllocEventCollector oam;
1129 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1130 // There are no signers for primitive types
1131 return NULL;
1132 }
1133
1134 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1135
1136 // If there are no signers set in the class, or if the class
1137 // is an array, return NULL.
1138 if (signers == NULL) return NULL;
1139
1140 // copy of the signers array
1141 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1142 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1143 for (int index = 0; index < signers->length(); index++) {
1144 signers_copy->obj_at_put(index, signers->obj_at(index));
1145 }
1146
1147 // return the copy
1148 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1149 JVM_END
1150
1151
1152 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1153 JVMWrapper("JVM_SetClassSigners");
1154 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1155 // This call is ignored for primitive types and arrays.
1156 // Signers are only set once, ClassLoader.java, and thus shouldn't
1157 // be called with an array. Only the bootstrap loader creates arrays.
1158 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1159 if (k->is_instance_klass()) {
1160 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1161 }
1162 }
1163 JVM_END
1164
1165
1166 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1167 JVMWrapper("JVM_GetProtectionDomain");
1168 if (JNIHandles::resolve(cls) == NULL) {
1169 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1170 }
1171
1172 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1173 // Primitive types does not have a protection domain.
1174 return NULL;
1175 }
1176
1177 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1178 return (jobject) JNIHandles::make_local(env, pd);
1179 JVM_END
1180
1181
1182 // Returns the inherited_access_control_context field of the running thread.
1183 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1184 JVMWrapper("JVM_GetInheritedAccessControlContext");
1185 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1186 return JNIHandles::make_local(env, result);
1187 JVM_END
1188
1189 class RegisterArrayForGC {
1190 private:
1191 JavaThread *_thread;
1192 public:
1193 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1194 _thread = thread;
1195 _thread->register_array_for_gc(array);
1196 }
1197
1198 ~RegisterArrayForGC() {
1199 _thread->register_array_for_gc(NULL);
1200 }
1201 };
1202
1203
1204 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1205 JVMWrapper("JVM_GetStackAccessControlContext");
1206 if (!UsePrivilegedStack) return NULL;
1207
1208 ResourceMark rm(THREAD);
1209 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1210 JvmtiVMObjectAllocEventCollector oam;
1211
1212 // count the protection domains on the execution stack. We collapse
1213 // duplicate consecutive protection domains into a single one, as
1214 // well as stopping when we hit a privileged frame.
1215
1216 oop previous_protection_domain = NULL;
1217 Handle privileged_context(thread, NULL);
1218 bool is_privileged = false;
1219 oop protection_domain = NULL;
1220
1221 // Iterate through Java frames
1222 vframeStream vfst(thread);
1223 for(; !vfst.at_end(); vfst.next()) {
1224 // get method of frame
1225 Method* method = vfst.method();
1226
1227 // stop at the first privileged frame
1228 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1229 method->name() == vmSymbols::executePrivileged_name())
1230 {
1231 // this frame is privileged
1232 is_privileged = true;
1233
1234 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1235
1236 StackValueCollection* locals = priv->locals();
1237 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1238 StackValue* clr_sv = locals->at(2); // Class<?> caller
1239 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1240 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1241 privileged_context = ctx_sv->get_obj();
1242 Handle caller = clr_sv->get_obj();
1243
1244 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1245 protection_domain = caller_klass->protection_domain();
1246 } else {
1247 protection_domain = method->method_holder()->protection_domain();
1248 }
1249
1250 if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1251 local_array->push(protection_domain);
1252 previous_protection_domain = protection_domain;
1253 }
1254
1255 if (is_privileged) break;
1256 }
1257
1258
1259 // either all the domains on the stack were system domains, or
1260 // we had a privileged system domain
1261 if (local_array->is_empty()) {
1262 if (is_privileged && privileged_context.is_null()) return NULL;
1263
1264 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1265 return JNIHandles::make_local(env, result);
1266 }
1267
1268 // the resource area must be registered in case of a gc
1269 RegisterArrayForGC ragc(thread, local_array);
1270 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1271 local_array->length(), CHECK_NULL);
1272 objArrayHandle h_context(thread, context);
1273 for (int index = 0; index < local_array->length(); index++) {
1274 h_context->obj_at_put(index, local_array->at(index));
1275 }
1276
1277 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1278
1279 return JNIHandles::make_local(env, result);
1280 JVM_END
1281
1282
1283 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1284 JVMWrapper("JVM_IsArrayClass");
1285 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1286 return (k != NULL) && k->is_array_klass() ? true : false;
1287 JVM_END
1288
1289
1290 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1291 JVMWrapper("JVM_IsPrimitiveClass");
1292 oop mirror = JNIHandles::resolve_non_null(cls);
1293 return (jboolean) java_lang_Class::is_primitive(mirror);
1294 JVM_END
1295
1296
1297 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1298 JVMWrapper("JVM_GetClassModifiers");
1299 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1300 // Primitive type
1301 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1302 }
1303
1304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1305 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1306 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1307 return k->modifier_flags();
1308 JVM_END
1309
1310
1311 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1312
1313 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1314 JvmtiVMObjectAllocEventCollector oam;
1315 // ofClass is a reference to a java_lang_Class object. The mirror object
1316 // of an InstanceKlass
1317
1318 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1319 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1320 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1321 return (jobjectArray)JNIHandles::make_local(env, result);
1322 }
1323
1324 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1325 InnerClassesIterator iter(k);
1326
1327 if (iter.length() == 0) {
1328 // Neither an inner nor outer class
1329 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1330 return (jobjectArray)JNIHandles::make_local(env, result);
1331 }
1332
1333 // find inner class info
1334 constantPoolHandle cp(thread, k->constants());
1335 int length = iter.length();
1336
1337 // Allocate temp. result array
1338 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1339 objArrayHandle result (THREAD, r);
1340 int members = 0;
1341
1342 for (; !iter.done(); iter.next()) {
1343 int ioff = iter.inner_class_info_index();
1344 int ooff = iter.outer_class_info_index();
1345
1346 if (ioff != 0 && ooff != 0) {
1347 // Check to see if the name matches the class we're looking for
1348 // before attempting to find the class.
1349 if (cp->klass_name_at_matches(k, ooff)) {
1350 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1351 if (outer_klass == k) {
1352 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1353 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1354
1355 // Throws an exception if outer klass has not declared k as
1356 // an inner klass
1357 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1358
1359 result->obj_at_put(members, inner_klass->java_mirror());
1360 members++;
1361 }
1362 }
1363 }
1364 }
1365
1366 if (members != length) {
1367 // Return array of right length
1368 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1369 for(int i = 0; i < members; i++) {
1370 res->obj_at_put(i, result->obj_at(i));
1371 }
1372 return (jobjectArray)JNIHandles::make_local(env, res);
1373 }
1374
1375 return (jobjectArray)JNIHandles::make_local(env, result());
1376 JVM_END
1377
1378
1379 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1380 {
1381 // ofClass is a reference to a java_lang_Class object.
1382 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1383 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1384 return NULL;
1385 }
1386
1387 bool inner_is_member = false;
1388 Klass* outer_klass
1389 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1390 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1391 if (outer_klass == NULL) return NULL; // already a top-level class
1392 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1393 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1394 }
1395 JVM_END
1396
1397 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1398 {
1399 oop mirror = JNIHandles::resolve_non_null(cls);
1400 if (java_lang_Class::is_primitive(mirror) ||
1401 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1402 return NULL;
1403 }
1404 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1405 int ooff = 0, noff = 0;
1406 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1407 if (noff != 0) {
1408 constantPoolHandle i_cp(thread, k->constants());
1409 Symbol* name = i_cp->symbol_at(noff);
1410 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1411 return (jstring) JNIHandles::make_local(env, str());
1412 }
1413 }
1414 return NULL;
1415 }
1416 JVM_END
1417
1418 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1419 assert (cls != NULL, "illegal class");
1420 JVMWrapper("JVM_GetClassSignature");
1421 JvmtiVMObjectAllocEventCollector oam;
1422 ResourceMark rm(THREAD);
1423 // Return null for arrays and primatives
1424 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1425 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1426 if (k->is_instance_klass()) {
1427 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1428 if (sym == NULL) return NULL;
1429 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1430 return (jstring) JNIHandles::make_local(env, str());
1431 }
1432 }
1433 return NULL;
1434 JVM_END
1435
1436
1437 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1438 assert (cls != NULL, "illegal class");
1439 JVMWrapper("JVM_GetClassAnnotations");
1440
1441 // Return null for arrays and primitives
1442 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1443 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1444 if (k->is_instance_klass()) {
1445 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1446 return (jbyteArray) JNIHandles::make_local(env, a);
1447 }
1448 }
1449 return NULL;
1450 JVM_END
1451
1452
1453 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1454 // some of this code was adapted from from jni_FromReflectedField
1455
1456 oop reflected = JNIHandles::resolve_non_null(field);
1457 oop mirror = java_lang_reflect_Field::clazz(reflected);
1458 Klass* k = java_lang_Class::as_Klass(mirror);
1459 int slot = java_lang_reflect_Field::slot(reflected);
1460 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1461
1462 InstanceKlass* ik = InstanceKlass::cast(k);
1463 intptr_t offset = ik->field_offset(slot);
1464
1465 if (modifiers & JVM_ACC_STATIC) {
1466 // for static fields we only look in the current class
1467 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1468 assert(false, "cannot find static field");
1469 return false;
1470 }
1471 } else {
1472 // for instance fields we start with the current class and work
1473 // our way up through the superclass chain
1474 if (!ik->find_field_from_offset(offset, false, &fd)) {
1475 assert(false, "cannot find instance field");
1476 return false;
1477 }
1478 }
1479 return true;
1480 }
1481
1482 static Method* jvm_get_method_common(jobject method) {
1483 // some of this code was adapted from from jni_FromReflectedMethod
1484
1485 oop reflected = JNIHandles::resolve_non_null(method);
1486 oop mirror = NULL;
1487 int slot = 0;
1488
1489 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1490 mirror = java_lang_reflect_Constructor::clazz(reflected);
1491 slot = java_lang_reflect_Constructor::slot(reflected);
1492 } else {
1493 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1494 "wrong type");
1495 mirror = java_lang_reflect_Method::clazz(reflected);
1496 slot = java_lang_reflect_Method::slot(reflected);
1497 }
1498 Klass* k = java_lang_Class::as_Klass(mirror);
1499
1500 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1501 assert(m != NULL, "cannot find method");
1502 return m; // caller has to deal with NULL in product mode
1503 }
1504
1505 /* Type use annotations support (JDK 1.8) */
1506
1507 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1508 assert (cls != NULL, "illegal class");
1509 JVMWrapper("JVM_GetClassTypeAnnotations");
1510 ResourceMark rm(THREAD);
1511 // Return null for arrays and primitives
1512 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1513 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1514 if (k->is_instance_klass()) {
1515 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1516 if (type_annotations != NULL) {
1517 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1518 return (jbyteArray) JNIHandles::make_local(env, a);
1519 }
1520 }
1521 }
1522 return NULL;
1523 JVM_END
1524
1525 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1526 assert (method != NULL, "illegal method");
1527 JVMWrapper("JVM_GetMethodTypeAnnotations");
1528
1529 // method is a handle to a java.lang.reflect.Method object
1530 Method* m = jvm_get_method_common(method);
1531 if (m == NULL) {
1532 return NULL;
1533 }
1534
1535 AnnotationArray* type_annotations = m->type_annotations();
1536 if (type_annotations != NULL) {
1537 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1538 return (jbyteArray) JNIHandles::make_local(env, a);
1539 }
1540
1541 return NULL;
1542 JVM_END
1543
1544 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1545 assert (field != NULL, "illegal field");
1546 JVMWrapper("JVM_GetFieldTypeAnnotations");
1547
1548 fieldDescriptor fd;
1549 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1550 if (!gotFd) {
1551 return NULL;
1552 }
1553
1554 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1555 JVM_END
1556
1557 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1558 if (!cp->is_within_bounds(index)) {
1559 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1560 }
1561 }
1562
1563 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1564 {
1565 JVMWrapper("JVM_GetMethodParameters");
1566 // method is a handle to a java.lang.reflect.Method object
1567 Method* method_ptr = jvm_get_method_common(method);
1568 methodHandle mh (THREAD, method_ptr);
1569 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1570 const int num_params = mh->method_parameters_length();
1571
1572 if (num_params < 0) {
1573 // A -1 return value from method_parameters_length means there is no
1574 // parameter data. Return null to indicate this to the reflection
1575 // API.
1576 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1577 return (jobjectArray)NULL;
1578 } else {
1579 // Otherwise, we return something up to reflection, even if it is
1580 // a zero-length array. Why? Because in some cases this can
1581 // trigger a MalformedParametersException.
1582
1583 // make sure all the symbols are properly formatted
1584 for (int i = 0; i < num_params; i++) {
1585 MethodParametersElement* params = mh->method_parameters_start();
1586 int index = params[i].name_cp_index;
1587 bounds_check(mh->constants(), index, CHECK_NULL);
1588
1589 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1590 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1591 "Wrong type at constant pool index");
1592 }
1593
1594 }
1595
1596 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1597 objArrayHandle result (THREAD, result_oop);
1598
1599 for (int i = 0; i < num_params; i++) {
1600 MethodParametersElement* params = mh->method_parameters_start();
1601 // For a 0 index, give a NULL symbol
1602 Symbol* sym = 0 != params[i].name_cp_index ?
1603 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1604 int flags = params[i].flags;
1605 oop param = Reflection::new_parameter(reflected_method, i, sym,
1606 flags, CHECK_NULL);
1607 result->obj_at_put(i, param);
1608 }
1609 return (jobjectArray)JNIHandles::make_local(env, result());
1610 }
1611 }
1612 JVM_END
1613
1614 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1615
1616 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1617 {
1618 JVMWrapper("JVM_GetClassDeclaredFields");
1619 JvmtiVMObjectAllocEventCollector oam;
1620
1621 // Exclude primitive types and array types
1622 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1623 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1624 // Return empty array
1625 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1626 return (jobjectArray) JNIHandles::make_local(env, res);
1627 }
1628
1629 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1630 constantPoolHandle cp(THREAD, k->constants());
1631
1632 // Ensure class is linked
1633 k->link_class(CHECK_NULL);
1634
1635 // Allocate result
1636 int num_fields;
1637
1638 if (publicOnly) {
1639 num_fields = 0;
1640 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1641 if (fs.access_flags().is_public()) ++num_fields;
1642 }
1643 } else {
1644 num_fields = k->java_fields_count();
1645 }
1646
1647 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1648 objArrayHandle result (THREAD, r);
1649
1650 int out_idx = 0;
1651 fieldDescriptor fd;
1652 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1653 if (!publicOnly || fs.access_flags().is_public()) {
1654 fd.reinitialize(k, fs.index());
1655 oop field = Reflection::new_field(&fd, CHECK_NULL);
1656 result->obj_at_put(out_idx, field);
1657 ++out_idx;
1658 }
1659 }
1660 assert(out_idx == num_fields, "just checking");
1661 return (jobjectArray) JNIHandles::make_local(env, result());
1662 }
1663 JVM_END
1664
1665 static bool select_method(const methodHandle& method, bool want_constructor) {
1666 if (want_constructor) {
1667 return (method->is_initializer() && !method->is_static());
1668 } else {
1669 return (!method->is_initializer() && !method->is_overpass());
1670 }
1671 }
1672
1673 static jobjectArray get_class_declared_methods_helper(
1674 JNIEnv *env,
1675 jclass ofClass, jboolean publicOnly,
1676 bool want_constructor,
1677 Klass* klass, TRAPS) {
1678
1679 JvmtiVMObjectAllocEventCollector oam;
1680
1681 // Exclude primitive types and array types
1682 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1683 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1684 // Return empty array
1685 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1686 return (jobjectArray) JNIHandles::make_local(env, res);
1687 }
1688
1689 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1690
1691 // Ensure class is linked
1692 k->link_class(CHECK_NULL);
1693
1694 Array<Method*>* methods = k->methods();
1695 int methods_length = methods->length();
1696
1697 // Save original method_idnum in case of redefinition, which can change
1698 // the idnum of obsolete methods. The new method will have the same idnum
1699 // but if we refresh the methods array, the counts will be wrong.
1700 ResourceMark rm(THREAD);
1701 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1702 int num_methods = 0;
1703
1704 for (int i = 0; i < methods_length; i++) {
1705 methodHandle method(THREAD, methods->at(i));
1706 if (select_method(method, want_constructor)) {
1707 if (!publicOnly || method->is_public()) {
1708 idnums->push(method->method_idnum());
1709 ++num_methods;
1710 }
1711 }
1712 }
1713
1714 // Allocate result
1715 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1716 objArrayHandle result (THREAD, r);
1717
1718 // Now just put the methods that we selected above, but go by their idnum
1719 // in case of redefinition. The methods can be redefined at any safepoint,
1720 // so above when allocating the oop array and below when creating reflect
1721 // objects.
1722 for (int i = 0; i < num_methods; i++) {
1723 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1724 if (method.is_null()) {
1725 // Method may have been deleted and seems this API can handle null
1726 // Otherwise should probably put a method that throws NSME
1727 result->obj_at_put(i, NULL);
1728 } else {
1729 oop m;
1730 if (want_constructor) {
1731 m = Reflection::new_constructor(method, CHECK_NULL);
1732 } else {
1733 m = Reflection::new_method(method, false, CHECK_NULL);
1734 }
1735 result->obj_at_put(i, m);
1736 }
1737 }
1738
1739 return (jobjectArray) JNIHandles::make_local(env, result());
1740 }
1741
1742 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1743 {
1744 JVMWrapper("JVM_GetClassDeclaredMethods");
1745 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1746 /*want_constructor*/ false,
1747 SystemDictionary::reflect_Method_klass(), THREAD);
1748 }
1749 JVM_END
1750
1751 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1752 {
1753 JVMWrapper("JVM_GetClassDeclaredConstructors");
1754 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1755 /*want_constructor*/ true,
1756 SystemDictionary::reflect_Constructor_klass(), THREAD);
1757 }
1758 JVM_END
1759
1760 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1761 {
1762 JVMWrapper("JVM_GetClassAccessFlags");
1763 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1764 // Primitive type
1765 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1766 }
1767
1768 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1769 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1770 }
1771 JVM_END
1772
1773 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1774 {
1775 JVMWrapper("JVM_AreNestMates");
1776 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1777 assert(c->is_instance_klass(), "must be");
1778 InstanceKlass* ck = InstanceKlass::cast(c);
1779 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1780 assert(m->is_instance_klass(), "must be");
1781 InstanceKlass* mk = InstanceKlass::cast(m);
1782 return ck->has_nestmate_access_to(mk, THREAD);
1783 }
1784 JVM_END
1785
1786 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1787 {
1788 // current is not a primitive or array class
1789 JVMWrapper("JVM_GetNestHost");
1790 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1791 assert(c->is_instance_klass(), "must be");
1792 InstanceKlass* ck = InstanceKlass::cast(c);
1793 // Don't post exceptions if validation fails
1794 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1795 return (jclass) (host == NULL ? NULL :
1796 JNIHandles::make_local(THREAD, host->java_mirror()));
1797 }
1798 JVM_END
1799
1800 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1801 {
1802 // current is not a primitive or array class
1803 JVMWrapper("JVM_GetNestMembers");
1804 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1805 assert(c->is_instance_klass(), "must be");
1806 InstanceKlass* ck = InstanceKlass::cast(c);
1807 // Get the nest host for this nest - throw ICCE if validation fails
1808 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1809 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1810
1811 {
1812 JvmtiVMObjectAllocEventCollector oam;
1813 Array<u2>* members = host->nest_members();
1814 int length = members == NULL ? 0 : members->length();
1815 // nest host is first in the array so make it one bigger
1816 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1817 length + 1, CHECK_NULL);
1818 objArrayHandle result (THREAD, r);
1819 result->obj_at_put(0, host->java_mirror());
1820 if (length != 0) {
1821 int i;
1822 for (i = 0; i < length; i++) {
1823 int cp_index = members->at(i);
1824 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1825 if (k->is_instance_klass()) {
1826 InstanceKlass* nest_host_k =
1827 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1828 if (nest_host_k == host) {
1829 result->obj_at_put(i+1, k->java_mirror());
1830 }
1831 else {
1832 // k's nest host is legal but it isn't our host so
1833 // throw ICCE
1834 ResourceMark rm(THREAD);
1835 Exceptions::fthrow(THREAD_AND_LOCATION,
1836 icce,
1837 "Nest member %s in %s declares a different nest host of %s",
1838 k->external_name(),
1839 host->external_name(),
1840 nest_host_k->external_name()
1841 );
1842 return NULL;
1843 }
1844 }
1845 else {
1846 // we have a bad nest member entry - throw ICCE
1847 ResourceMark rm(THREAD);
1848 Exceptions::fthrow(THREAD_AND_LOCATION,
1849 icce,
1850 "Class %s can not be a nest member of %s",
1851 k->external_name(),
1852 host->external_name()
1853 );
1854 return NULL;
1855 }
1856 }
1857 }
1858 else {
1859 assert(host == ck, "must be singleton nest");
1860 }
1861 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1862 }
1863 }
1864 JVM_END
1865
1866 // Constant pool access //////////////////////////////////////////////////////////
1867
1868 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1869 {
1870 JVMWrapper("JVM_GetClassConstantPool");
1871 JvmtiVMObjectAllocEventCollector oam;
1872
1873 // Return null for primitives and arrays
1874 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1875 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1876 if (k->is_instance_klass()) {
1877 InstanceKlass* k_h = InstanceKlass::cast(k);
1878 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1879 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1880 return JNIHandles::make_local(jcp());
1881 }
1882 }
1883 return NULL;
1884 }
1885 JVM_END
1886
1887
1888 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1889 {
1890 JVMWrapper("JVM_ConstantPoolGetSize");
1891 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1892 return cp->length();
1893 }
1894 JVM_END
1895
1896
1897 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1898 {
1899 JVMWrapper("JVM_ConstantPoolGetClassAt");
1900 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1901 bounds_check(cp, index, CHECK_NULL);
1902 constantTag tag = cp->tag_at(index);
1903 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1904 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1905 }
1906 Klass* k = cp->klass_at(index, CHECK_NULL);
1907 return (jclass) JNIHandles::make_local(k->java_mirror());
1908 }
1909 JVM_END
1910
1911 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1912 {
1913 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1914 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1915 bounds_check(cp, index, CHECK_NULL);
1916 constantTag tag = cp->tag_at(index);
1917 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1918 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1919 }
1920 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1921 if (k == NULL) return NULL;
1922 return (jclass) JNIHandles::make_local(k->java_mirror());
1923 }
1924 JVM_END
1925
1926 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1927 constantTag tag = cp->tag_at(index);
1928 if (!tag.is_method() && !tag.is_interface_method()) {
1929 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1930 }
1931 int klass_ref = cp->uncached_klass_ref_index_at(index);
1932 Klass* k_o;
1933 if (force_resolution) {
1934 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1935 } else {
1936 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1937 if (k_o == NULL) return NULL;
1938 }
1939 InstanceKlass* k = InstanceKlass::cast(k_o);
1940 Symbol* name = cp->uncached_name_ref_at(index);
1941 Symbol* sig = cp->uncached_signature_ref_at(index);
1942 methodHandle m (THREAD, k->find_method(name, sig));
1943 if (m.is_null()) {
1944 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1945 }
1946 oop method;
1947 if (!m->is_initializer() || m->is_static()) {
1948 method = Reflection::new_method(m, true, CHECK_NULL);
1949 } else {
1950 method = Reflection::new_constructor(m, CHECK_NULL);
1951 }
1952 return JNIHandles::make_local(method);
1953 }
1954
1955 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1956 {
1957 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1958 JvmtiVMObjectAllocEventCollector oam;
1959 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1960 bounds_check(cp, index, CHECK_NULL);
1961 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1962 return res;
1963 }
1964 JVM_END
1965
1966 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1967 {
1968 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1969 JvmtiVMObjectAllocEventCollector oam;
1970 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1971 bounds_check(cp, index, CHECK_NULL);
1972 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1973 return res;
1974 }
1975 JVM_END
1976
1977 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1978 constantTag tag = cp->tag_at(index);
1979 if (!tag.is_field()) {
1980 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1981 }
1982 int klass_ref = cp->uncached_klass_ref_index_at(index);
1983 Klass* k_o;
1984 if (force_resolution) {
1985 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1986 } else {
1987 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1988 if (k_o == NULL) return NULL;
1989 }
1990 InstanceKlass* k = InstanceKlass::cast(k_o);
1991 Symbol* name = cp->uncached_name_ref_at(index);
1992 Symbol* sig = cp->uncached_signature_ref_at(index);
1993 fieldDescriptor fd;
1994 Klass* target_klass = k->find_field(name, sig, &fd);
1995 if (target_klass == NULL) {
1996 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1997 }
1998 oop field = Reflection::new_field(&fd, CHECK_NULL);
1999 return JNIHandles::make_local(field);
2000 }
2001
2002 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2003 {
2004 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2005 JvmtiVMObjectAllocEventCollector oam;
2006 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2007 bounds_check(cp, index, CHECK_NULL);
2008 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2009 return res;
2010 }
2011 JVM_END
2012
2013 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2014 {
2015 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2016 JvmtiVMObjectAllocEventCollector oam;
2017 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2018 bounds_check(cp, index, CHECK_NULL);
2019 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2020 return res;
2021 }
2022 JVM_END
2023
2024 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2025 {
2026 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2027 JvmtiVMObjectAllocEventCollector oam;
2028 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2029 bounds_check(cp, index, CHECK_NULL);
2030 constantTag tag = cp->tag_at(index);
2031 if (!tag.is_field_or_method()) {
2032 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2033 }
2034 int klass_ref = cp->uncached_klass_ref_index_at(index);
2035 Symbol* klass_name = cp->klass_name_at(klass_ref);
2036 Symbol* member_name = cp->uncached_name_ref_at(index);
2037 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2038 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2039 objArrayHandle dest(THREAD, dest_o);
2040 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2041 dest->obj_at_put(0, str());
2042 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2043 dest->obj_at_put(1, str());
2044 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2045 dest->obj_at_put(2, str());
2046 return (jobjectArray) JNIHandles::make_local(dest());
2047 }
2048 JVM_END
2049
2050 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2051 {
2052 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2053 JvmtiVMObjectAllocEventCollector oam;
2054 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2055 bounds_check(cp, index, CHECK_0);
2056 constantTag tag = cp->tag_at(index);
2057 if (!tag.is_field_or_method()) {
2058 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2059 }
2060 return (jint) cp->uncached_klass_ref_index_at(index);
2061 }
2062 JVM_END
2063
2064 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2065 {
2066 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2067 JvmtiVMObjectAllocEventCollector oam;
2068 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2069 bounds_check(cp, index, CHECK_0);
2070 constantTag tag = cp->tag_at(index);
2071 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2072 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2073 }
2074 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2075 }
2076 JVM_END
2077
2078 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2079 {
2080 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2081 JvmtiVMObjectAllocEventCollector oam;
2082 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2083 bounds_check(cp, index, CHECK_NULL);
2084 constantTag tag = cp->tag_at(index);
2085 if (!tag.is_name_and_type()) {
2086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2087 }
2088 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2089 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2090 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2091 objArrayHandle dest(THREAD, dest_o);
2092 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2093 dest->obj_at_put(0, str());
2094 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2095 dest->obj_at_put(1, str());
2096 return (jobjectArray) JNIHandles::make_local(dest());
2097 }
2098 JVM_END
2099
2100 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2101 {
2102 JVMWrapper("JVM_ConstantPoolGetIntAt");
2103 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2104 bounds_check(cp, index, CHECK_0);
2105 constantTag tag = cp->tag_at(index);
2106 if (!tag.is_int()) {
2107 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2108 }
2109 return cp->int_at(index);
2110 }
2111 JVM_END
2112
2113 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2114 {
2115 JVMWrapper("JVM_ConstantPoolGetLongAt");
2116 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2117 bounds_check(cp, index, CHECK_(0L));
2118 constantTag tag = cp->tag_at(index);
2119 if (!tag.is_long()) {
2120 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2121 }
2122 return cp->long_at(index);
2123 }
2124 JVM_END
2125
2126 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2127 {
2128 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2129 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2130 bounds_check(cp, index, CHECK_(0.0f));
2131 constantTag tag = cp->tag_at(index);
2132 if (!tag.is_float()) {
2133 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2134 }
2135 return cp->float_at(index);
2136 }
2137 JVM_END
2138
2139 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2140 {
2141 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2142 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2143 bounds_check(cp, index, CHECK_(0.0));
2144 constantTag tag = cp->tag_at(index);
2145 if (!tag.is_double()) {
2146 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2147 }
2148 return cp->double_at(index);
2149 }
2150 JVM_END
2151
2152 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2153 {
2154 JVMWrapper("JVM_ConstantPoolGetStringAt");
2155 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2156 bounds_check(cp, index, CHECK_NULL);
2157 constantTag tag = cp->tag_at(index);
2158 if (!tag.is_string()) {
2159 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2160 }
2161 oop str = cp->string_at(index, CHECK_NULL);
2162 return (jstring) JNIHandles::make_local(str);
2163 }
2164 JVM_END
2165
2166 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2167 {
2168 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2169 JvmtiVMObjectAllocEventCollector oam;
2170 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2171 bounds_check(cp, index, CHECK_NULL);
2172 constantTag tag = cp->tag_at(index);
2173 if (!tag.is_symbol()) {
2174 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2175 }
2176 Symbol* sym = cp->symbol_at(index);
2177 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2178 return (jstring) JNIHandles::make_local(str());
2179 }
2180 JVM_END
2181
2182 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2183 {
2184 JVMWrapper("JVM_ConstantPoolGetTagAt");
2185 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2186 bounds_check(cp, index, CHECK_0);
2187 constantTag tag = cp->tag_at(index);
2188 jbyte result = tag.value();
2189 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2190 // they are changed to the corresponding tags from the JVM spec, so that java code in
2191 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2192 if (tag.is_klass_or_reference()) {
2193 result = JVM_CONSTANT_Class;
2194 } else if (tag.is_string_index()) {
2195 result = JVM_CONSTANT_String;
2196 } else if (tag.is_method_type_in_error()) {
2197 result = JVM_CONSTANT_MethodType;
2198 } else if (tag.is_method_handle_in_error()) {
2199 result = JVM_CONSTANT_MethodHandle;
2200 } else if (tag.is_dynamic_constant_in_error()) {
2201 result = JVM_CONSTANT_Dynamic;
2202 }
2203 return result;
2204 }
2205 JVM_END
2206
2207 // Assertion support. //////////////////////////////////////////////////////////
2208
2209 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2210 JVMWrapper("JVM_DesiredAssertionStatus");
2211 assert(cls != NULL, "bad class");
2212
2213 oop r = JNIHandles::resolve(cls);
2214 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2215 if (java_lang_Class::is_primitive(r)) return false;
2216
2217 Klass* k = java_lang_Class::as_Klass(r);
2218 assert(k->is_instance_klass(), "must be an instance klass");
2219 if (!k->is_instance_klass()) return false;
2220
2221 ResourceMark rm(THREAD);
2222 const char* name = k->name()->as_C_string();
2223 bool system_class = k->class_loader() == NULL;
2224 return JavaAssertions::enabled(name, system_class);
2225
2226 JVM_END
2227
2228
2229 // Return a new AssertionStatusDirectives object with the fields filled in with
2230 // command-line assertion arguments (i.e., -ea, -da).
2231 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2232 JVMWrapper("JVM_AssertionStatusDirectives");
2233 JvmtiVMObjectAllocEventCollector oam;
2234 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2235 return JNIHandles::make_local(env, asd);
2236 JVM_END
2237
2238 // Verification ////////////////////////////////////////////////////////////////////////////////
2239
2240 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2241
2242 // RedefineClasses support: bug 6214132 caused verification to fail.
2243 // All functions from this section should call the jvmtiThreadSate function:
2244 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2245 // The function returns a Klass* of the _scratch_class if the verifier
2246 // was invoked in the middle of the class redefinition.
2247 // Otherwise it returns its argument value which is the _the_class Klass*.
2248 // Please, refer to the description in the jvmtiThreadSate.hpp.
2249
2250 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2251 JVMWrapper("JVM_GetClassNameUTF");
2252 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2253 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2254 return k->name()->as_utf8();
2255 JVM_END
2256
2257
2258 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2259 JVMWrapper("JVM_GetClassCPTypes");
2260 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2261 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2262 // types will have length zero if this is not an InstanceKlass
2263 // (length is determined by call to JVM_GetClassCPEntriesCount)
2264 if (k->is_instance_klass()) {
2265 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2266 for (int index = cp->length() - 1; index >= 0; index--) {
2267 constantTag tag = cp->tag_at(index);
2268 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2269 }
2270 }
2271 JVM_END
2272
2273
2274 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2275 JVMWrapper("JVM_GetClassCPEntriesCount");
2276 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2277 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2278 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2279 JVM_END
2280
2281
2282 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2283 JVMWrapper("JVM_GetClassFieldsCount");
2284 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2285 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2286 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2287 JVM_END
2288
2289
2290 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2291 JVMWrapper("JVM_GetClassMethodsCount");
2292 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2295 JVM_END
2296
2297
2298 // The following methods, used for the verifier, are never called with
2299 // array klasses, so a direct cast to InstanceKlass is safe.
2300 // Typically, these methods are called in a loop with bounds determined
2301 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2302 // zero for arrays.
2303 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2304 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2308 int length = method->checked_exceptions_length();
2309 if (length > 0) {
2310 CheckedExceptionElement* table= method->checked_exceptions_start();
2311 for (int i = 0; i < length; i++) {
2312 exceptions[i] = table[i].class_cp_index;
2313 }
2314 }
2315 JVM_END
2316
2317
2318 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2319 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2320 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2321 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2322 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2323 return method->checked_exceptions_length();
2324 JVM_END
2325
2326
2327 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2328 JVMWrapper("JVM_GetMethodIxByteCode");
2329 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2330 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2331 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2332 memcpy(code, method->code_base(), method->code_size());
2333 JVM_END
2334
2335
2336 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2337 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2338 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2339 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2340 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2341 return method->code_size();
2342 JVM_END
2343
2344
2345 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2346 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2347 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2348 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2349 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2350 ExceptionTable extable(method);
2351 entry->start_pc = extable.start_pc(entry_index);
2352 entry->end_pc = extable.end_pc(entry_index);
2353 entry->handler_pc = extable.handler_pc(entry_index);
2354 entry->catchType = extable.catch_type_index(entry_index);
2355 JVM_END
2356
2357
2358 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2359 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2360 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2361 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2362 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2363 return method->exception_table_length();
2364 JVM_END
2365
2366
2367 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2368 JVMWrapper("JVM_GetMethodIxModifiers");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2372 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2373 JVM_END
2374
2375
2376 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2377 JVMWrapper("JVM_GetFieldIxModifiers");
2378 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2379 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2380 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2381 JVM_END
2382
2383
2384 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2385 JVMWrapper("JVM_GetMethodIxLocalsCount");
2386 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2387 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2388 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2389 return method->max_locals();
2390 JVM_END
2391
2392
2393 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2394 JVMWrapper("JVM_GetMethodIxArgsSize");
2395 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2396 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2397 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2398 return method->size_of_parameters();
2399 JVM_END
2400
2401
2402 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2403 JVMWrapper("JVM_GetMethodIxMaxStack");
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2407 return method->verifier_max_stack();
2408 JVM_END
2409
2410
2411 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2412 JVMWrapper("JVM_IsConstructorIx");
2413 ResourceMark rm(THREAD);
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 return method->name() == vmSymbols::object_initializer_name();
2418 JVM_END
2419
2420
2421 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2422 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2423 ResourceMark rm(THREAD);
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2427 return method->is_overpass();
2428 JVM_END
2429
2430 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2431 JVMWrapper("JVM_GetMethodIxIxUTF");
2432 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2435 return method->name()->as_utf8();
2436 JVM_END
2437
2438
2439 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2440 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2441 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2442 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2443 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2444 return method->signature()->as_utf8();
2445 JVM_END
2446
2447 /**
2448 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2449 * read entries in the constant pool. Since the old verifier always
2450 * works on a copy of the code, it will not see any rewriting that
2451 * may possibly occur in the middle of verification. So it is important
2452 * that nothing it calls tries to use the cpCache instead of the raw
2453 * constant pool, so we must use cp->uncached_x methods when appropriate.
2454 */
2455 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2456 JVMWrapper("JVM_GetCPFieldNameUTF");
2457 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2458 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2459 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2460 switch (cp->tag_at(cp_index).value()) {
2461 case JVM_CONSTANT_Fieldref:
2462 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2463 default:
2464 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2465 }
2466 ShouldNotReachHere();
2467 return NULL;
2468 JVM_END
2469
2470
2471 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2472 JVMWrapper("JVM_GetCPMethodNameUTF");
2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2476 switch (cp->tag_at(cp_index).value()) {
2477 case JVM_CONSTANT_InterfaceMethodref:
2478 case JVM_CONSTANT_Methodref:
2479 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2480 default:
2481 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2482 }
2483 ShouldNotReachHere();
2484 return NULL;
2485 JVM_END
2486
2487
2488 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2489 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2493 switch (cp->tag_at(cp_index).value()) {
2494 case JVM_CONSTANT_InterfaceMethodref:
2495 case JVM_CONSTANT_Methodref:
2496 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2497 default:
2498 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2499 }
2500 ShouldNotReachHere();
2501 return NULL;
2502 JVM_END
2503
2504
2505 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2506 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2508 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2509 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2510 switch (cp->tag_at(cp_index).value()) {
2511 case JVM_CONSTANT_Fieldref:
2512 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2513 default:
2514 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2515 }
2516 ShouldNotReachHere();
2517 return NULL;
2518 JVM_END
2519
2520
2521 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2522 JVMWrapper("JVM_GetCPClassNameUTF");
2523 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2524 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2525 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2526 Symbol* classname = cp->klass_name_at(cp_index);
2527 return classname->as_utf8();
2528 JVM_END
2529
2530
2531 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2532 JVMWrapper("JVM_GetCPFieldClassNameUTF");
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_Fieldref: {
2538 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2539 Symbol* classname = cp->klass_name_at(class_index);
2540 return classname->as_utf8();
2541 }
2542 default:
2543 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2544 }
2545 ShouldNotReachHere();
2546 return NULL;
2547 JVM_END
2548
2549
2550 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2551 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2552 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2553 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2554 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2555 switch (cp->tag_at(cp_index).value()) {
2556 case JVM_CONSTANT_Methodref:
2557 case JVM_CONSTANT_InterfaceMethodref: {
2558 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2559 Symbol* classname = cp->klass_name_at(class_index);
2560 return classname->as_utf8();
2561 }
2562 default:
2563 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2564 }
2565 ShouldNotReachHere();
2566 return NULL;
2567 JVM_END
2568
2569
2570 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2571 JVMWrapper("JVM_GetCPFieldModifiers");
2572 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2573 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2574 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2575 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2576 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2577 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2578 switch (cp->tag_at(cp_index).value()) {
2579 case JVM_CONSTANT_Fieldref: {
2580 Symbol* name = cp->uncached_name_ref_at(cp_index);
2581 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2582 InstanceKlass* ik = InstanceKlass::cast(k_called);
2583 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2584 if (fs.name() == name && fs.signature() == signature) {
2585 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2586 }
2587 }
2588 return -1;
2589 }
2590 default:
2591 fatal("JVM_GetCPFieldModifiers: illegal constant");
2592 }
2593 ShouldNotReachHere();
2594 return 0;
2595 JVM_END
2596
2597
2598 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2599 JVMWrapper("JVM_GetCPMethodModifiers");
2600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2601 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2602 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2603 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2604 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2605 switch (cp->tag_at(cp_index).value()) {
2606 case JVM_CONSTANT_Methodref:
2607 case JVM_CONSTANT_InterfaceMethodref: {
2608 Symbol* name = cp->uncached_name_ref_at(cp_index);
2609 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2610 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2611 int methods_count = methods->length();
2612 for (int i = 0; i < methods_count; i++) {
2613 Method* method = methods->at(i);
2614 if (method->name() == name && method->signature() == signature) {
2615 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2616 }
2617 }
2618 return -1;
2619 }
2620 default:
2621 fatal("JVM_GetCPMethodModifiers: illegal constant");
2622 }
2623 ShouldNotReachHere();
2624 return 0;
2625 JVM_END
2626
2627
2628 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2629
2630 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2631 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2632 JVM_END
2633
2634
2635 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2636 JVMWrapper("JVM_IsSameClassPackage");
2637 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2638 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2639 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2640 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2641 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2642 JVM_END
2643
2644 // Printing support //////////////////////////////////////////////////
2645 extern "C" {
2646
2647 ATTRIBUTE_PRINTF(3, 0)
2648 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2649 // Reject count values that are negative signed values converted to
2650 // unsigned; see bug 4399518, 4417214
2651 if ((intptr_t)count <= 0) return -1;
2652
2653 int result = os::vsnprintf(str, count, fmt, args);
2654 if (result > 0 && (size_t)result >= count) {
2655 result = -1;
2656 }
2657
2658 return result;
2659 }
2660
2661 ATTRIBUTE_PRINTF(3, 4)
2662 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2663 va_list args;
2664 int len;
2665 va_start(args, fmt);
2666 len = jio_vsnprintf(str, count, fmt, args);
2667 va_end(args);
2668 return len;
2669 }
2670
2671 ATTRIBUTE_PRINTF(2, 3)
2672 int jio_fprintf(FILE* f, const char *fmt, ...) {
2673 int len;
2674 va_list args;
2675 va_start(args, fmt);
2676 len = jio_vfprintf(f, fmt, args);
2677 va_end(args);
2678 return len;
2679 }
2680
2681 ATTRIBUTE_PRINTF(2, 0)
2682 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2683 if (Arguments::vfprintf_hook() != NULL) {
2684 return Arguments::vfprintf_hook()(f, fmt, args);
2685 } else {
2686 return vfprintf(f, fmt, args);
2687 }
2688 }
2689
2690 ATTRIBUTE_PRINTF(1, 2)
2691 JNIEXPORT int jio_printf(const char *fmt, ...) {
2692 int len;
2693 va_list args;
2694 va_start(args, fmt);
2695 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2696 va_end(args);
2697 return len;
2698 }
2699
2700 // HotSpot specific jio method
2701 void jio_print(const char* s, size_t len) {
2702 // Try to make this function as atomic as possible.
2703 if (Arguments::vfprintf_hook() != NULL) {
2704 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2705 } else {
2706 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2707 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2708 }
2709 }
2710
2711 } // Extern C
2712
2713 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2714
2715 // In most of the JVM thread support functions we need to access the
2716 // thread through a ThreadsListHandle to prevent it from exiting and
2717 // being reclaimed while we try to operate on it. The exceptions to this
2718 // rule are when operating on the current thread, or if the monitor of
2719 // the target java.lang.Thread is locked at the Java level - in both
2720 // cases the target cannot exit.
2721
2722 static void thread_entry(JavaThread* thread, TRAPS) {
2723 HandleMark hm(THREAD);
2724 Handle obj(THREAD, thread->threadObj());
2725 JavaValue result(T_VOID);
2726 JavaCalls::call_virtual(&result,
2727 obj,
2728 SystemDictionary::Thread_klass(),
2729 vmSymbols::run_method_name(),
2730 vmSymbols::void_method_signature(),
2731 THREAD);
2732 }
2733
2734
2735 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2736 JVMWrapper("JVM_StartThread");
2737 JavaThread *native_thread = NULL;
2738
2739 // We cannot hold the Threads_lock when we throw an exception,
2740 // due to rank ordering issues. Example: we might need to grab the
2741 // Heap_lock while we construct the exception.
2742 bool throw_illegal_thread_state = false;
2743
2744 // We must release the Threads_lock before we can post a jvmti event
2745 // in Thread::start.
2746 {
2747 // Ensure that the C++ Thread and OSThread structures aren't freed before
2748 // we operate.
2749 MutexLocker mu(Threads_lock);
2750
2751 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2752 // re-starting an already started thread, so we should usually find
2753 // that the JavaThread is null. However for a JNI attached thread
2754 // there is a small window between the Thread object being created
2755 // (with its JavaThread set) and the update to its threadStatus, so we
2756 // have to check for this
2757 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2758 throw_illegal_thread_state = true;
2759 } else {
2760 // We could also check the stillborn flag to see if this thread was already stopped, but
2761 // for historical reasons we let the thread detect that itself when it starts running
2762
2763 jlong size =
2764 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2765 // Allocate the C++ Thread structure and create the native thread. The
2766 // stack size retrieved from java is 64-bit signed, but the constructor takes
2767 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2768 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2769 // - Avoid passing negative values which would result in really large stacks.
2770 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2771 size_t sz = size > 0 ? (size_t) size : 0;
2772 native_thread = new JavaThread(&thread_entry, sz);
2773
2774 // At this point it may be possible that no osthread was created for the
2775 // JavaThread due to lack of memory. Check for this situation and throw
2776 // an exception if necessary. Eventually we may want to change this so
2777 // that we only grab the lock if the thread was created successfully -
2778 // then we can also do this check and throw the exception in the
2779 // JavaThread constructor.
2780 if (native_thread->osthread() != NULL) {
2781 // Note: the current thread is not being used within "prepare".
2782 native_thread->prepare(jthread);
2783 }
2784 }
2785 }
2786
2787 if (throw_illegal_thread_state) {
2788 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2789 }
2790
2791 assert(native_thread != NULL, "Starting null thread?");
2792
2793 if (native_thread->osthread() == NULL) {
2794 // No one should hold a reference to the 'native_thread'.
2795 native_thread->smr_delete();
2796 if (JvmtiExport::should_post_resource_exhausted()) {
2797 JvmtiExport::post_resource_exhausted(
2798 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2799 os::native_thread_creation_failed_msg());
2800 }
2801 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2802 os::native_thread_creation_failed_msg());
2803 }
2804
2805 Thread::start(native_thread);
2806
2807 JVM_END
2808
2809
2810 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2811 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2812 // but is thought to be reliable and simple. In the case, where the receiver is the
2813 // same thread as the sender, no VM_Operation is needed.
2814 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2815 JVMWrapper("JVM_StopThread");
2816
2817 // A nested ThreadsListHandle will grab the Threads_lock so create
2818 // tlh before we resolve throwable.
2819 ThreadsListHandle tlh(thread);
2820 oop java_throwable = JNIHandles::resolve(throwable);
2821 if (java_throwable == NULL) {
2822 THROW(vmSymbols::java_lang_NullPointerException());
2823 }
2824 oop java_thread = NULL;
2825 JavaThread* receiver = NULL;
2826 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2827 Events::log_exception(thread,
2828 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2829 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2830
2831 if (is_alive) {
2832 // jthread refers to a live JavaThread.
2833 if (thread == receiver) {
2834 // Exception is getting thrown at self so no VM_Operation needed.
2835 THROW_OOP(java_throwable);
2836 } else {
2837 // Use a VM_Operation to throw the exception.
2838 Thread::send_async_exception(java_thread, java_throwable);
2839 }
2840 } else {
2841 // Either:
2842 // - target thread has not been started before being stopped, or
2843 // - target thread already terminated
2844 // We could read the threadStatus to determine which case it is
2845 // but that is overkill as it doesn't matter. We must set the
2846 // stillborn flag for the first case, and if the thread has already
2847 // exited setting this flag has no effect.
2848 java_lang_Thread::set_stillborn(java_thread);
2849 }
2850 JVM_END
2851
2852
2853 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2854 JVMWrapper("JVM_IsThreadAlive");
2855
2856 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2857 return java_lang_Thread::is_alive(thread_oop);
2858 JVM_END
2859
2860
2861 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2862 JVMWrapper("JVM_SuspendThread");
2863
2864 ThreadsListHandle tlh(thread);
2865 JavaThread* receiver = NULL;
2866 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2867 if (is_alive) {
2868 // jthread refers to a live JavaThread.
2869 {
2870 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2871 if (receiver->is_external_suspend()) {
2872 // Don't allow nested external suspend requests. We can't return
2873 // an error from this interface so just ignore the problem.
2874 return;
2875 }
2876 if (receiver->is_exiting()) { // thread is in the process of exiting
2877 return;
2878 }
2879 receiver->set_external_suspend();
2880 }
2881
2882 // java_suspend() will catch threads in the process of exiting
2883 // and will ignore them.
2884 receiver->java_suspend();
2885
2886 // It would be nice to have the following assertion in all the
2887 // time, but it is possible for a racing resume request to have
2888 // resumed this thread right after we suspended it. Temporarily
2889 // enable this assertion if you are chasing a different kind of
2890 // bug.
2891 //
2892 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2893 // receiver->is_being_ext_suspended(), "thread is not suspended");
2894 }
2895 JVM_END
2896
2897
2898 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2899 JVMWrapper("JVM_ResumeThread");
2900
2901 ThreadsListHandle tlh(thread);
2902 JavaThread* receiver = NULL;
2903 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2904 if (is_alive) {
2905 // jthread refers to a live JavaThread.
2906
2907 // This is the original comment for this Threads_lock grab:
2908 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2909 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2910 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2911 // looks at it.
2912 //
2913 // The above comment dates back to when we had both internal and
2914 // external suspend APIs that shared a common underlying mechanism.
2915 // External suspend is now entirely cooperative and doesn't share
2916 // anything with internal suspend. That said, there are some
2917 // assumptions in the VM that an external resume grabs the
2918 // Threads_lock. We can't drop the Threads_lock grab here until we
2919 // resolve the assumptions that exist elsewhere.
2920 //
2921 MutexLocker ml(Threads_lock);
2922 receiver->java_resume();
2923 }
2924 JVM_END
2925
2926
2927 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2928 JVMWrapper("JVM_SetThreadPriority");
2929
2930 ThreadsListHandle tlh(thread);
2931 oop java_thread = NULL;
2932 JavaThread* receiver = NULL;
2933 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2934 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2935
2936 if (is_alive) {
2937 // jthread refers to a live JavaThread.
2938 Thread::set_priority(receiver, (ThreadPriority)prio);
2939 }
2940 // Implied else: If the JavaThread hasn't started yet, then the
2941 // priority set in the java.lang.Thread object above will be pushed
2942 // down when it does start.
2943 JVM_END
2944
2945
2946 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2947 JVMWrapper("JVM_Yield");
2948 if (os::dont_yield()) return;
2949 HOTSPOT_THREAD_YIELD();
2950 os::naked_yield();
2951 JVM_END
2952
2953 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2954 assert(event != NULL, "invariant");
2955 assert(event->should_commit(), "invariant");
2956 event->set_time(millis);
2957 event->commit();
2958 }
2959
2960 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2961 JVMWrapper("JVM_Sleep");
2962
2963 if (millis < 0) {
2964 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2965 }
2966
2967 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2968 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2969 }
2970
2971 // Save current thread state and restore it at the end of this block.
2972 // And set new thread state to SLEEPING.
2973 JavaThreadSleepState jtss(thread);
2974
2975 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2976 EventThreadSleep event;
2977
2978 if (millis == 0) {
2979 os::naked_yield();
2980 } else {
2981 ThreadState old_state = thread->osthread()->get_state();
2982 thread->osthread()->set_state(SLEEPING);
2983 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2984 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2985 // us while we were sleeping. We do not overwrite those.
2986 if (!HAS_PENDING_EXCEPTION) {
2987 if (event.should_commit()) {
2988 post_thread_sleep_event(&event, millis);
2989 }
2990 HOTSPOT_THREAD_SLEEP_END(1);
2991
2992 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2993 // to properly restore the thread state. That's likely wrong.
2994 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2995 }
2996 }
2997 thread->osthread()->set_state(old_state);
2998 }
2999 if (event.should_commit()) {
3000 post_thread_sleep_event(&event, millis);
3001 }
3002 HOTSPOT_THREAD_SLEEP_END(0);
3003 JVM_END
3004
3005 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3006 JVMWrapper("JVM_CurrentThread");
3007 oop jthread = thread->threadObj();
3008 assert (thread != NULL, "no current thread!");
3009 return JNIHandles::make_local(env, jthread);
3010 JVM_END
3011
3012
3013 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3014 JVMWrapper("JVM_CountStackFrames");
3015
3016 uint32_t debug_bits = 0;
3017 ThreadsListHandle tlh(thread);
3018 JavaThread* receiver = NULL;
3019 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3020 int count = 0;
3021 if (is_alive) {
3022 // jthread refers to a live JavaThread.
3023 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3024 // Count all java activation, i.e., number of vframes.
3025 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3026 // Native frames are not counted.
3027 if (!vfst.method()->is_native()) count++;
3028 }
3029 } else {
3030 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3031 "this thread is not suspended");
3032 }
3033 }
3034 // Implied else: if JavaThread is not alive simply return a count of 0.
3035
3036 return count;
3037 JVM_END
3038
3039
3040 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3041 JVMWrapper("JVM_Interrupt");
3042
3043 ThreadsListHandle tlh(thread);
3044 JavaThread* receiver = NULL;
3045 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3046 if (is_alive) {
3047 // jthread refers to a live JavaThread.
3048 Thread::interrupt(receiver);
3049 }
3050 JVM_END
3051
3052
3053 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3054 JVMWrapper("JVM_IsInterrupted");
3055
3056 ThreadsListHandle tlh(thread);
3057 JavaThread* receiver = NULL;
3058 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3059 if (is_alive) {
3060 // jthread refers to a live JavaThread.
3061 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3062 } else {
3063 return JNI_FALSE;
3064 }
3065 JVM_END
3066
3067
3068 // Return true iff the current thread has locked the object passed in
3069
3070 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3071 JVMWrapper("JVM_HoldsLock");
3072 assert(THREAD->is_Java_thread(), "sanity check");
3073 if (obj == NULL) {
3074 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3075 }
3076 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3077 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3078 JVM_END
3079
3080
3081 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3082 JVMWrapper("JVM_DumpAllStacks");
3083 VM_PrintThreads op;
3084 VMThread::execute(&op);
3085 if (JvmtiExport::should_post_data_dump()) {
3086 JvmtiExport::post_data_dump();
3087 }
3088 JVM_END
3089
3090 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3091 JVMWrapper("JVM_SetNativeThreadName");
3092
3093 // We don't use a ThreadsListHandle here because the current thread
3094 // must be alive.
3095 oop java_thread = JNIHandles::resolve_non_null(jthread);
3096 JavaThread* thr = java_lang_Thread::thread(java_thread);
3097 if (thread == thr && !thr->has_attached_via_jni()) {
3098 // Thread naming is only supported for the current thread and
3099 // we don't set the name of an attached thread to avoid stepping
3100 // on other programs.
3101 ResourceMark rm(thread);
3102 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3103 os::set_native_thread_name(thread_name);
3104 }
3105 JVM_END
3106
3107 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3108
3109 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3110 JVMWrapper("JVM_GetClassContext");
3111 ResourceMark rm(THREAD);
3112 JvmtiVMObjectAllocEventCollector oam;
3113 vframeStream vfst(thread);
3114
3115 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3116 // This must only be called from SecurityManager.getClassContext
3117 Method* m = vfst.method();
3118 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3119 m->name() == vmSymbols::getClassContext_name() &&
3120 m->signature() == vmSymbols::void_class_array_signature())) {
3121 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3122 }
3123 }
3124
3125 // Collect method holders
3126 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3127 for (; !vfst.at_end(); vfst.security_next()) {
3128 Method* m = vfst.method();
3129 // Native frames are not returned
3130 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3131 Klass* holder = m->method_holder();
3132 assert(holder->is_klass(), "just checking");
3133 klass_array->append(holder);
3134 }
3135 }
3136
3137 // Create result array of type [Ljava/lang/Class;
3138 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3139 // Fill in mirrors corresponding to method holders
3140 for (int i = 0; i < klass_array->length(); i++) {
3141 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3142 }
3143
3144 return (jobjectArray) JNIHandles::make_local(env, result);
3145 JVM_END
3146
3147
3148 // java.lang.Package ////////////////////////////////////////////////////////////////
3149
3150
3151 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3152 JVMWrapper("JVM_GetSystemPackage");
3153 ResourceMark rm(THREAD);
3154 JvmtiVMObjectAllocEventCollector oam;
3155 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3156 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3157 return (jstring) JNIHandles::make_local(result);
3158 JVM_END
3159
3160
3161 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3162 JVMWrapper("JVM_GetSystemPackages");
3163 JvmtiVMObjectAllocEventCollector oam;
3164 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3165 return (jobjectArray) JNIHandles::make_local(result);
3166 JVM_END
3167
3168
3169 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3170
3171
3172 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3173 JVMWrapper("JVM_GetAndClearReferencePendingList");
3174
3175 MonitorLockerEx ml(Heap_lock);
3176 oop ref = Universe::reference_pending_list();
3177 if (ref != NULL) {
3178 Universe::set_reference_pending_list(NULL);
3179 }
3180 return JNIHandles::make_local(env, ref);
3181 JVM_END
3182
3183 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3184 JVMWrapper("JVM_HasReferencePendingList");
3185 MonitorLockerEx ml(Heap_lock);
3186 return Universe::has_reference_pending_list();
3187 JVM_END
3188
3189 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3190 JVMWrapper("JVM_WaitForReferencePendingList");
3191 MonitorLockerEx ml(Heap_lock);
3192 while (!Universe::has_reference_pending_list()) {
3193 ml.wait();
3194 }
3195 JVM_END
3196
3197
3198 // ObjectInputStream ///////////////////////////////////////////////////////////////
3199
3200 // Return the first user-defined class loader up the execution stack, or null
3201 // if only code from the bootstrap or platform class loader is on the stack.
3202
3203 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3204 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3205 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3206 oop loader = vfst.method()->method_holder()->class_loader();
3207 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3208 return JNIHandles::make_local(env, loader);
3209 }
3210 }
3211 return NULL;
3212 JVM_END
3213
3214
3215 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3216
3217
3218 // resolve array handle and check arguments
3219 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3220 if (arr == NULL) {
3221 THROW_0(vmSymbols::java_lang_NullPointerException());
3222 }
3223 oop a = JNIHandles::resolve_non_null(arr);
3224 if (!a->is_array()) {
3225 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3226 } else if (type_array_only && !a->is_typeArray()) {
3227 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3228 }
3229 return arrayOop(a);
3230 }
3231
3232
3233 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3234 JVMWrapper("JVM_GetArrayLength");
3235 arrayOop a = check_array(env, arr, false, CHECK_0);
3236 return a->length();
3237 JVM_END
3238
3239
3240 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3241 JVMWrapper("JVM_Array_Get");
3242 JvmtiVMObjectAllocEventCollector oam;
3243 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3244 jvalue value;
3245 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3246 oop box = Reflection::box(&value, type, CHECK_NULL);
3247 return JNIHandles::make_local(env, box);
3248 JVM_END
3249
3250
3251 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3252 JVMWrapper("JVM_GetPrimitiveArrayElement");
3253 jvalue value;
3254 value.i = 0; // to initialize value before getting used in CHECK
3255 arrayOop a = check_array(env, arr, true, CHECK_(value));
3256 assert(a->is_typeArray(), "just checking");
3257 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3258 BasicType wide_type = (BasicType) wCode;
3259 if (type != wide_type) {
3260 Reflection::widen(&value, type, wide_type, CHECK_(value));
3261 }
3262 return value;
3263 JVM_END
3264
3265
3266 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3267 JVMWrapper("JVM_SetArrayElement");
3268 arrayOop a = check_array(env, arr, false, CHECK);
3269 oop box = JNIHandles::resolve(val);
3270 jvalue value;
3271 value.i = 0; // to initialize value before getting used in CHECK
3272 BasicType value_type;
3273 if (a->is_objArray()) {
3274 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3275 value_type = Reflection::unbox_for_regular_object(box, &value);
3276 } else {
3277 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3278 }
3279 Reflection::array_set(&value, a, index, value_type, CHECK);
3280 JVM_END
3281
3282
3283 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3284 JVMWrapper("JVM_SetPrimitiveArrayElement");
3285 arrayOop a = check_array(env, arr, true, CHECK);
3286 assert(a->is_typeArray(), "just checking");
3287 BasicType value_type = (BasicType) vCode;
3288 Reflection::array_set(&v, a, index, value_type, CHECK);
3289 JVM_END
3290
3291
3292 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3293 JVMWrapper("JVM_NewArray");
3294 JvmtiVMObjectAllocEventCollector oam;
3295 oop element_mirror = JNIHandles::resolve(eltClass);
3296 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3297 return JNIHandles::make_local(env, result);
3298 JVM_END
3299
3300
3301 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3302 JVMWrapper("JVM_NewMultiArray");
3303 JvmtiVMObjectAllocEventCollector oam;
3304 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3305 oop element_mirror = JNIHandles::resolve(eltClass);
3306 assert(dim_array->is_typeArray(), "just checking");
3307 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3308 return JNIHandles::make_local(env, result);
3309 JVM_END
3310
3311
3312 // Library support ///////////////////////////////////////////////////////////////////////////
3313
3314 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3315 //%note jvm_ct
3316 JVMWrapper("JVM_LoadLibrary");
3317 char ebuf[1024];
3318 void *load_result;
3319 {
3320 ThreadToNativeFromVM ttnfvm(thread);
3321 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3322 }
3323 if (load_result == NULL) {
3324 char msg[1024];
3325 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3326 // Since 'ebuf' may contain a string encoded using
3327 // platform encoding scheme, we need to pass
3328 // Exceptions::unsafe_to_utf8 to the new_exception method
3329 // as the last argument. See bug 6367357.
3330 Handle h_exception =
3331 Exceptions::new_exception(thread,
3332 vmSymbols::java_lang_UnsatisfiedLinkError(),
3333 msg, Exceptions::unsafe_to_utf8);
3334
3335 THROW_HANDLE_0(h_exception);
3336 }
3337 return load_result;
3338 JVM_END
3339
3340
3341 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3342 JVMWrapper("JVM_UnloadLibrary");
3343 os::dll_unload(handle);
3344 JVM_END
3345
3346
3347 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3348 JVMWrapper("JVM_FindLibraryEntry");
3349 return os::dll_lookup(handle, name);
3350 JVM_END
3351
3352
3353 // JNI version ///////////////////////////////////////////////////////////////////////////////
3354
3355 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3356 JVMWrapper("JVM_IsSupportedJNIVersion");
3357 return Threads::is_supported_jni_version_including_1_1(version);
3358 JVM_END
3359
3360
3361 // String support ///////////////////////////////////////////////////////////////////////////
3362
3363 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3364 JVMWrapper("JVM_InternString");
3365 JvmtiVMObjectAllocEventCollector oam;
3366 if (str == NULL) return NULL;
3367 oop string = JNIHandles::resolve_non_null(str);
3368 oop result = StringTable::intern(string, CHECK_NULL);
3369 return (jstring) JNIHandles::make_local(env, result);
3370 JVM_END
3371
3372
3373 // Raw monitor support //////////////////////////////////////////////////////////////////////
3374
3375 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3376 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3377 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3378 // that only works with java threads.
3379
3380
3381 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3382 VM_Exit::block_if_vm_exited();
3383 JVMWrapper("JVM_RawMonitorCreate");
3384 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3385 }
3386
3387
3388 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3389 VM_Exit::block_if_vm_exited();
3390 JVMWrapper("JVM_RawMonitorDestroy");
3391 delete ((Mutex*) mon);
3392 }
3393
3394
3395 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3396 VM_Exit::block_if_vm_exited();
3397 JVMWrapper("JVM_RawMonitorEnter");
3398 ((Mutex*) mon)->jvm_raw_lock();
3399 return 0;
3400 }
3401
3402
3403 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3404 VM_Exit::block_if_vm_exited();
3405 JVMWrapper("JVM_RawMonitorExit");
3406 ((Mutex*) mon)->jvm_raw_unlock();
3407 }
3408
3409
3410 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3411
3412 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3413 Handle loader, Handle protection_domain,
3414 jboolean throwError, TRAPS) {
3415 // Security Note:
3416 // The Java level wrapper will perform the necessary security check allowing
3417 // us to pass the NULL as the initiating class loader. The VM is responsible for
3418 // the checkPackageAccess relative to the initiating class loader via the
3419 // protection_domain. The protection_domain is passed as NULL by the java code
3420 // if there is no security manager in 3-arg Class.forName().
3421 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3422
3423 // Check if we should initialize the class
3424 if (init && klass->is_instance_klass()) {
3425 klass->initialize(CHECK_NULL);
3426 }
3427 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3428 }
3429
3430
3431 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3432
3433 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3434 JVMWrapper("JVM_InvokeMethod");
3435 Handle method_handle;
3436 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3437 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3438 Handle receiver(THREAD, JNIHandles::resolve(obj));
3439 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3440 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3441 jobject res = JNIHandles::make_local(env, result);
3442 if (JvmtiExport::should_post_vm_object_alloc()) {
3443 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3444 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3445 if (java_lang_Class::is_primitive(ret_type)) {
3446 // Only for primitive type vm allocates memory for java object.
3447 // See box() method.
3448 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3449 }
3450 }
3451 return res;
3452 } else {
3453 THROW_0(vmSymbols::java_lang_StackOverflowError());
3454 }
3455 JVM_END
3456
3457
3458 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3459 JVMWrapper("JVM_NewInstanceFromConstructor");
3460 oop constructor_mirror = JNIHandles::resolve(c);
3461 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3462 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3463 jobject res = JNIHandles::make_local(env, result);
3464 if (JvmtiExport::should_post_vm_object_alloc()) {
3465 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3466 }
3467 return res;
3468 JVM_END
3469
3470 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3471
3472 JVM_LEAF(jboolean, JVM_SupportsCX8())
3473 JVMWrapper("JVM_SupportsCX8");
3474 return VM_Version::supports_cx8();
3475 JVM_END
3476
3477 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3478 JVMWrapper("JVM_InitializeFromArchive");
3479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3480 assert(k->is_klass(), "just checking");
3481 HeapShared::initialize_from_archived_subgraph(k);
3482 JVM_END
3483
3484 // Returns an array of all live Thread objects (VM internal JavaThreads,
3485 // jvmti agent threads, and JNI attaching threads are skipped)
3486 // See CR 6404306 regarding JNI attaching threads
3487 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3488 ResourceMark rm(THREAD);
3489 ThreadsListEnumerator tle(THREAD, false, false);
3490 JvmtiVMObjectAllocEventCollector oam;
3491
3492 int num_threads = tle.num_threads();
3493 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3494 objArrayHandle threads_ah(THREAD, r);
3495
3496 for (int i = 0; i < num_threads; i++) {
3497 Handle h = tle.get_threadObj(i);
3498 threads_ah->obj_at_put(i, h());
3499 }
3500
3501 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3502 JVM_END
3503
3504
3505 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3506 // Return StackTraceElement[][], each element is the stack trace of a thread in
3507 // the corresponding entry in the given threads array
3508 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3509 JVMWrapper("JVM_DumpThreads");
3510 JvmtiVMObjectAllocEventCollector oam;
3511
3512 // Check if threads is null
3513 if (threads == NULL) {
3514 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3515 }
3516
3517 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3518 objArrayHandle ah(THREAD, a);
3519 int num_threads = ah->length();
3520 // check if threads is non-empty array
3521 if (num_threads == 0) {
3522 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3523 }
3524
3525 // check if threads is not an array of objects of Thread class
3526 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3527 if (k != SystemDictionary::Thread_klass()) {
3528 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3529 }
3530
3531 ResourceMark rm(THREAD);
3532
3533 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3534 for (int i = 0; i < num_threads; i++) {
3535 oop thread_obj = ah->obj_at(i);
3536 instanceHandle h(THREAD, (instanceOop) thread_obj);
3537 thread_handle_array->append(h);
3538 }
3539
3540 // The JavaThread references in thread_handle_array are validated
3541 // in VM_ThreadDump::doit().
3542 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3543 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3544
3545 JVM_END
3546
3547 // JVM monitoring and management support
3548 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3549 return Management::get_jmm_interface(version);
3550 JVM_END
3551
3552 // com.sun.tools.attach.VirtualMachine agent properties support
3553 //
3554 // Initialize the agent properties with the properties maintained in the VM
3555 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3556 JVMWrapper("JVM_InitAgentProperties");
3557 ResourceMark rm;
3558
3559 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3560
3561 PUTPROP(props, "sun.java.command", Arguments::java_command());
3562 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3563 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3564 return properties;
3565 JVM_END
3566
3567 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3568 {
3569 JVMWrapper("JVM_GetEnclosingMethodInfo");
3570 JvmtiVMObjectAllocEventCollector oam;
3571
3572 if (ofClass == NULL) {
3573 return NULL;
3574 }
3575 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3576 // Special handling for primitive objects
3577 if (java_lang_Class::is_primitive(mirror())) {
3578 return NULL;
3579 }
3580 Klass* k = java_lang_Class::as_Klass(mirror());
3581 if (!k->is_instance_klass()) {
3582 return NULL;
3583 }
3584 InstanceKlass* ik = InstanceKlass::cast(k);
3585 int encl_method_class_idx = ik->enclosing_method_class_index();
3586 if (encl_method_class_idx == 0) {
3587 return NULL;
3588 }
3589 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3590 objArrayHandle dest(THREAD, dest_o);
3591 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3592 dest->obj_at_put(0, enc_k->java_mirror());
3593 int encl_method_method_idx = ik->enclosing_method_method_index();
3594 if (encl_method_method_idx != 0) {
3595 Symbol* sym = ik->constants()->symbol_at(
3596 extract_low_short_from_int(
3597 ik->constants()->name_and_type_at(encl_method_method_idx)));
3598 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3599 dest->obj_at_put(1, str());
3600 sym = ik->constants()->symbol_at(
3601 extract_high_short_from_int(
3602 ik->constants()->name_and_type_at(encl_method_method_idx)));
3603 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3604 dest->obj_at_put(2, str());
3605 }
3606 return (jobjectArray) JNIHandles::make_local(dest());
3607 }
3608 JVM_END
3609
3610 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3611 {
3612 memset(info, 0, info_size);
3613
3614 info->jvm_version = VM_Version::jvm_version();
3615 info->patch_version = VM_Version::vm_patch_version();
3616
3617 // when we add a new capability in the jvm_version_info struct, we should also
3618 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3619 // counter defined in runtimeService.cpp.
3620 info->is_attach_supported = AttachListener::is_attach_supported();
3621 }
3622 JVM_END
3623
3624 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3625 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3626 ResourceMark rm(THREAD);
3627
3628 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3629 return NULL;
3630 }
3631
3632 char** vm_flags = Arguments::jvm_flags_array();
3633 char** vm_args = Arguments::jvm_args_array();
3634 int num_flags = Arguments::num_jvm_flags();
3635 int num_args = Arguments::num_jvm_args();
3636
3637 InstanceKlass* ik = SystemDictionary::String_klass();
3638 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3639 objArrayHandle result_h(THREAD, r);
3640
3641 int index = 0;
3642 for (int j = 0; j < num_flags; j++, index++) {
3643 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3644 result_h->obj_at_put(index, h());
3645 }
3646 for (int i = 0; i < num_args; i++, index++) {
3647 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3648 result_h->obj_at_put(index, h());
3649 }
3650 return (jobjectArray) JNIHandles::make_local(env, result_h());
3651 JVM_END
3652
3653 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3654 return os::get_signal_number(name);
3655 JVM_END