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/constantPool.hpp"
49 #include "oops/fieldStreams.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/method.hpp"
52 #include "oops/objArrayKlass.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "prims/jvm_misc.hpp"
56 #include "prims/jvmtiExport.hpp"
57 #include "prims/jvmtiThreadState.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "prims/stackwalk.hpp"
60 #include "runtime/arguments.hpp"
61 #include "runtime/atomic.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/init.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/deoptimization.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jfieldIDWorkaround.hpp"
69 #include "runtime/jniHandles.inline.hpp"
70 #include "runtime/orderAccess.hpp"
71 #include "runtime/os.inline.hpp"
72 #include "runtime/perfData.hpp"
73 #include "runtime/reflection.hpp"
74 #include "runtime/thread.inline.hpp"
75 #include "runtime/threadSMR.hpp"
76 #include "runtime/vframe.inline.hpp"
77 #include "runtime/vmOperations.hpp"
78 #include "runtime/vm_version.hpp"
79 #include "services/attachListener.hpp"
80 #include "services/management.hpp"
81 #include "services/threadService.hpp"
82 #include "utilities/copy.hpp"
83 #include "utilities/defaultStream.hpp"
84 #include "utilities/dtrace.hpp"
85 #include "utilities/events.hpp"
86 #include "utilities/histogram.hpp"
87 #include "utilities/macros.hpp"
88 #include "utilities/utf8.hpp"
89 #if INCLUDE_CDS
90 #include "classfile/systemDictionaryShared.hpp"
91 #endif
92
93 #include <errno.h>
94
95 /*
96 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
97 such ctors and calls MUST NOT come between an oop declaration/init and its
98 usage because if objects are move this may cause various memory stomps, bus
99 errors and segfaults. Here is a cookbook for causing so called "naked oop
100 failures":
101
102 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
103 JVMWrapper("JVM_GetClassDeclaredFields");
104
105 // Object address to be held directly in mirror & not visible to GC
106 oop mirror = JNIHandles::resolve_non_null(ofClass);
107
108 // If this ctor can hit a safepoint, moving objects around, then
109 ComplexConstructor foo;
110
111 // Boom! mirror may point to JUNK instead of the intended object
112 (some dereference of mirror)
113
114 // Here's another call that may block for GC, making mirror stale
115 MutexLocker ml(some_lock);
116
117 // And here's an initializer that can result in a stale oop
118 // all in one step.
119 oop o = call_that_can_throw_exception(TRAPS);
120
121
122 The solution is to keep the oop declaration BELOW the ctor or function
123 call that might cause a GC, do another resolve to reassign the oop, or
124 consider use of a Handle instead of an oop so there is immunity from object
125 motion. But note that the "QUICK" entries below do not have a handlemark
126 and thus can only support use of handles passed in.
127 */
128
129 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
130 ResourceMark rm;
131 int line_number = -1;
132 const char * source_file = NULL;
133 const char * trace = "explicit";
134 InstanceKlass* caller = NULL;
135 JavaThread* jthread = JavaThread::current();
136 if (jthread->has_last_Java_frame()) {
137 vframeStream vfst(jthread);
138
139 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
140 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
141 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
142 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
143 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
144
145 Method* last_caller = NULL;
146
147 while (!vfst.at_end()) {
148 Method* m = vfst.method();
149 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
150 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
151 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
152 break;
153 }
154 last_caller = m;
155 vfst.next();
156 }
157 // if this is called from Class.forName0 and that is called from Class.forName,
158 // then print the caller of Class.forName. If this is Class.loadClass, then print
159 // that caller, otherwise keep quiet since this should be picked up elsewhere.
160 bool found_it = false;
161 if (!vfst.at_end() &&
162 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
163 vfst.method()->name() == vmSymbols::forName0_name()) {
164 vfst.next();
165 if (!vfst.at_end() &&
166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
167 vfst.method()->name() == vmSymbols::forName_name()) {
168 vfst.next();
169 found_it = true;
170 }
171 } else if (last_caller != NULL &&
172 last_caller->method_holder()->name() ==
173 vmSymbols::java_lang_ClassLoader() &&
174 last_caller->name() == vmSymbols::loadClass_name()) {
175 found_it = true;
176 } else if (!vfst.at_end()) {
177 if (vfst.method()->is_native()) {
178 // JNI call
179 found_it = true;
180 }
181 }
182 if (found_it && !vfst.at_end()) {
183 // found the caller
184 caller = vfst.method()->method_holder();
185 line_number = vfst.method()->line_number_from_bci(vfst.bci());
186 if (line_number == -1) {
187 // show method name if it's a native method
188 trace = vfst.method()->name_and_sig_as_C_string();
189 }
190 Symbol* s = caller->source_file_name();
191 if (s != NULL) {
192 source_file = s->as_C_string();
193 }
194 }
195 }
196 if (caller != NULL) {
197 if (to_class != caller) {
198 const char * from = caller->external_name();
199 const char * to = to_class->external_name();
200 // print in a single call to reduce interleaving between threads
201 if (source_file != NULL) {
202 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
203 } else {
204 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
205 }
206 }
207 }
208 }
209
210 void trace_class_resolution(Klass* to_class) {
211 EXCEPTION_MARK;
212 trace_class_resolution_impl(to_class, THREAD);
213 if (HAS_PENDING_EXCEPTION) {
214 CLEAR_PENDING_EXCEPTION;
215 }
216 }
217
218 // Wrapper to trace JVM functions
219
220 #ifdef ASSERT
221 Histogram* JVMHistogram;
222 volatile int JVMHistogram_lock = 0;
223
224 class JVMHistogramElement : public HistogramElement {
225 public:
226 JVMHistogramElement(const char* name);
227 };
228
229 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
230 _name = elementName;
231 uintx count = 0;
232
233 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
234 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
235 count +=1;
236 if ( (WarnOnStalledSpinLock > 0)
237 && (count % WarnOnStalledSpinLock == 0)) {
238 warning("JVMHistogram_lock seems to be stalled");
239 }
240 }
241 }
242
243 if(JVMHistogram == NULL)
244 JVMHistogram = new Histogram("JVM Call Counts",100);
245
246 JVMHistogram->add_element(this);
247 Atomic::dec(&JVMHistogram_lock);
248 }
249
250 #define JVMCountWrapper(arg) \
251 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
252 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
253
254 #define JVMWrapper(arg) JVMCountWrapper(arg);
255 #else
256 #define JVMWrapper(arg)
257 #endif
258
259
260 // Interface version /////////////////////////////////////////////////////////////////////
261
262
263 JVM_LEAF(jint, JVM_GetInterfaceVersion())
264 return JVM_INTERFACE_VERSION;
265 JVM_END
266
267
268 // java.lang.System //////////////////////////////////////////////////////////////////////
269
270
271 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
272 JVMWrapper("JVM_CurrentTimeMillis");
273 return os::javaTimeMillis();
274 JVM_END
275
276 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
277 JVMWrapper("JVM_NanoTime");
278 return os::javaTimeNanos();
279 JVM_END
280
281 // The function below is actually exposed by jdk.internal.misc.VM and not
282 // java.lang.System, but we choose to keep it here so that it stays next
283 // to JVM_CurrentTimeMillis and JVM_NanoTime
284
285 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
286 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
287
288 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
289 JVMWrapper("JVM_GetNanoTimeAdjustment");
290 jlong seconds;
291 jlong nanos;
292
293 os::javaTimeSystemUTC(seconds, nanos);
294
295 // We're going to verify that the result can fit in a long.
296 // For that we need the difference in seconds between 'seconds'
297 // and 'offset_secs' to be such that:
298 // |seconds - offset_secs| < (2^63/10^9)
299 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
300 // which makes |seconds - offset_secs| < 2^33
301 // and we will prefer +/- 2^32 as the maximum acceptable diff
302 // as 2^32 has a more natural feel than 2^33...
303 //
304 // So if |seconds - offset_secs| >= 2^32 - we return a special
305 // sentinel value (-1) which the caller should take as an
306 // exception value indicating that the offset given to us is
307 // too far from range of the current time - leading to too big
308 // a nano adjustment. The caller is expected to recover by
309 // computing a more accurate offset and calling this method
310 // again. (For the record 2^32 secs is ~136 years, so that
311 // should rarely happen)
312 //
313 jlong diff = seconds - offset_secs;
314 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
315 return -1; // sentinel value: the offset is too far off the target
316 }
317
318 // return the adjustment. If you compute a time by adding
319 // this number of nanoseconds along with the number of seconds
320 // in the offset you should get the current UTC time.
321 return (diff * (jlong)1000000000) + nanos;
322 JVM_END
323
324 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
325 jobject dst, jint dst_pos, jint length))
326 JVMWrapper("JVM_ArrayCopy");
327 // Check if we have null pointers
328 if (src == NULL || dst == NULL) {
329 THROW(vmSymbols::java_lang_NullPointerException());
330 }
331 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
332 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
333 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
334 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
335 // Do copy
336 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
337 JVM_END
338
339
340 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
341 JavaValue r(T_OBJECT);
342 // public synchronized Object put(Object key, Object value);
343 HandleMark hm(THREAD);
344 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
345 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
346 JavaCalls::call_virtual(&r,
347 props,
348 SystemDictionary::Properties_klass(),
349 vmSymbols::put_name(),
350 vmSymbols::object_object_object_signature(),
351 key_str,
352 value_str,
353 THREAD);
354 }
355
356
357 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
358
359 /*
360 * Return all of the system properties in a Java String array with alternating
361 * names and values from the jvm SystemProperty.
362 * Which includes some internal and all commandline -D defined properties.
363 */
364 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
365 JVMWrapper("JVM_GetProperties");
366 ResourceMark rm(THREAD);
367 HandleMark hm(THREAD);
368 int ndx = 0;
369 int fixedCount = 2;
370
371 SystemProperty* p = Arguments::system_properties();
372 int count = Arguments::PropertyList_count(p);
373
374 // Allocate result String array
375 InstanceKlass* ik = SystemDictionary::String_klass();
376 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
377 objArrayHandle result_h(THREAD, r);
378
379 while (p != NULL) {
380 const char * key = p->key();
381 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
382 const char * value = p->value();
383 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
384 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
385 result_h->obj_at_put(ndx * 2, key_str());
386 result_h->obj_at_put(ndx * 2 + 1, value_str());
387 ndx++;
388 }
389 p = p->next();
390 }
391
392 // Convert the -XX:MaxDirectMemorySize= command line flag
393 // to the sun.nio.MaxDirectMemorySize property.
394 // Do this after setting user properties to prevent people
395 // from setting the value with a -D option, as requested.
396 // Leave empty if not supplied
397 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
398 char as_chars[256];
399 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
400 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
401 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
402 result_h->obj_at_put(ndx * 2, key_str());
403 result_h->obj_at_put(ndx * 2 + 1, value_str());
404 ndx++;
405 }
406
407 // JVM monitoring and management support
408 // Add the sun.management.compiler property for the compiler's name
409 {
410 #undef CSIZE
411 #if defined(_LP64) || defined(_WIN64)
412 #define CSIZE "64-Bit "
413 #else
414 #define CSIZE
415 #endif // 64bit
416
417 #ifdef TIERED
418 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
419 #else
420 #if defined(COMPILER1)
421 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
422 #elif defined(COMPILER2)
423 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
424 #elif INCLUDE_JVMCI
425 #error "INCLUDE_JVMCI should imply TIERED"
426 #else
427 const char* compiler_name = "";
428 #endif // compilers
429 #endif // TIERED
430
431 if (*compiler_name != '\0' &&
432 (Arguments::mode() != Arguments::_int)) {
433 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
434 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
435 result_h->obj_at_put(ndx * 2, key_str());
436 result_h->obj_at_put(ndx * 2 + 1, value_str());
437 ndx++;
438 }
439 }
440
441 return (jobjectArray) JNIHandles::make_local(env, result_h());
442 JVM_END
443
444
445 /*
446 * Return the temporary directory that the VM uses for the attach
447 * and perf data files.
448 *
449 * It is important that this directory is well-known and the
450 * same for all VM instances. It cannot be affected by configuration
451 * variables such as java.io.tmpdir.
452 */
453 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
454 JVMWrapper("JVM_GetTemporaryDirectory");
455 HandleMark hm(THREAD);
456 const char* temp_dir = os::get_temp_directory();
457 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
458 return (jstring) JNIHandles::make_local(env, h());
459 JVM_END
460
461
462 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
463
464 extern volatile jint vm_created;
465
466 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
467 JVMWrapper("JVM_BeforeHalt");
468 EventShutdown event;
469 if (event.should_commit()) {
470 event.set_reason("Shutdown requested from Java");
471 event.commit();
472 }
473 JVM_END
474
475
476 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
477 before_exit(thread);
478 vm_exit(code);
479 JVM_END
480
481
482 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
483 JVMWrapper("JVM_GC");
484 if (!DisableExplicitGC) {
485 Universe::heap()->collect(GCCause::_java_lang_system_gc);
486 }
487 JVM_END
488
489
490 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
491 JVMWrapper("JVM_MaxObjectInspectionAge");
492 return Universe::heap()->millis_since_last_gc();
493 JVM_END
494
495
496 static inline jlong convert_size_t_to_jlong(size_t val) {
497 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
498 NOT_LP64 (return (jlong)val;)
499 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
500 }
501
502 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
503 JVMWrapper("JVM_TotalMemory");
504 size_t n = Universe::heap()->capacity();
505 return convert_size_t_to_jlong(n);
506 JVM_END
507
508
509 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
510 JVMWrapper("JVM_FreeMemory");
511 CollectedHeap* ch = Universe::heap();
512 size_t n;
513 {
514 MutexLocker x(Heap_lock);
515 n = ch->capacity() - ch->used();
516 }
517 return convert_size_t_to_jlong(n);
518 JVM_END
519
520
521 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
522 JVMWrapper("JVM_MaxMemory");
523 size_t n = Universe::heap()->max_capacity();
524 return convert_size_t_to_jlong(n);
525 JVM_END
526
527
528 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
529 JVMWrapper("JVM_ActiveProcessorCount");
530 return os::active_processor_count();
531 JVM_END
532
533
534
535 // java.lang.Throwable //////////////////////////////////////////////////////
536
537
538 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
539 JVMWrapper("JVM_FillInStackTrace");
540 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
541 java_lang_Throwable::fill_in_stack_trace(exception);
542 JVM_END
543
544
545 // java.lang.StackTraceElement //////////////////////////////////////////////
546
547
548 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
549 JVMWrapper("JVM_InitStackTraceElementArray");
550 Handle exception(THREAD, JNIHandles::resolve(throwable));
551 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
552 objArrayHandle stack_trace(THREAD, st);
553 // Fill in the allocated stack trace
554 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
555 JVM_END
556
557
558 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
559 JVMWrapper("JVM_InitStackTraceElement");
560 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
561 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
562 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
563 JVM_END
564
565
566 // java.lang.StackWalker //////////////////////////////////////////////////////
567
568
569 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
570 jint skip_frames, jint frame_count, jint start_index,
571 jobjectArray frames))
572 JVMWrapper("JVM_CallStackWalk");
573 JavaThread* jt = (JavaThread*) THREAD;
574 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
575 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
576 }
577
578 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
579
580 // frames array is a Class<?>[] array when only getting caller reference,
581 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
582 // be null.
583 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
584 objArrayHandle frames_array_h(THREAD, fa);
585
586 int limit = start_index + frame_count;
587 if (frames_array_h->length() < limit) {
588 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
589 }
590
591 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
592 start_index, frames_array_h, CHECK_NULL);
593 return JNIHandles::make_local(env, result);
594 JVM_END
595
596
597 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
598 jint frame_count, jint start_index,
599 jobjectArray frames))
600 JVMWrapper("JVM_MoreStackWalk");
601 JavaThread* jt = (JavaThread*) THREAD;
602
603 // frames array is a Class<?>[] array when only getting caller reference,
604 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
605 // be null.
606 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
607 objArrayHandle frames_array_h(THREAD, fa);
608
609 int limit = start_index+frame_count;
610 if (frames_array_h->length() < limit) {
611 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
612 }
613
614 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
615 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
616 start_index, frames_array_h, THREAD);
617 JVM_END
618
619 // java.lang.Object ///////////////////////////////////////////////
620
621
622 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
623 JVMWrapper("JVM_IHashCode");
624 // as implemented in the classic virtual machine; return 0 if object is NULL
625 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
626 JVM_END
627
628
629 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
630 JVMWrapper("JVM_MonitorWait");
631 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
632 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
633 if (JvmtiExport::should_post_monitor_wait()) {
634 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
635
636 // The current thread already owns the monitor and it has not yet
637 // been added to the wait queue so the current thread cannot be
638 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
639 // event handler cannot accidentally consume an unpark() meant for
640 // the ParkEvent associated with this ObjectMonitor.
641 }
642 ObjectSynchronizer::wait(obj, ms, CHECK);
643 JVM_END
644
645
646 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
647 JVMWrapper("JVM_MonitorNotify");
648 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
649 ObjectSynchronizer::notify(obj, CHECK);
650 JVM_END
651
652
653 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
654 JVMWrapper("JVM_MonitorNotifyAll");
655 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
656 ObjectSynchronizer::notifyall(obj, CHECK);
657 JVM_END
658
659
660 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
661 JVMWrapper("JVM_Clone");
662 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
663 Klass* klass = obj->klass();
664 JvmtiVMObjectAllocEventCollector oam;
665
666 #ifdef ASSERT
667 // Just checking that the cloneable flag is set correct
668 if (obj->is_array()) {
669 guarantee(klass->is_cloneable(), "all arrays are cloneable");
670 } else {
671 guarantee(obj->is_instance(), "should be instanceOop");
672 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
673 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
674 }
675 #endif
676
677 // Check if class of obj supports the Cloneable interface.
678 // All arrays are considered to be cloneable (See JLS 20.1.5).
679 // All j.l.r.Reference classes are considered non-cloneable.
680 if (!klass->is_cloneable() ||
681 (klass->is_instance_klass() &&
682 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
683 ResourceMark rm(THREAD);
684 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
685 }
686
687 // Make shallow object copy
688 const int size = obj->size();
689 oop new_obj_oop = NULL;
690 if (obj->is_array()) {
691 const int length = ((arrayOop)obj())->length();
692 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
693 /* do_zero */ true, CHECK_NULL);
694 } else {
695 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
696 }
697
698 HeapAccess<>::clone(obj(), new_obj_oop, size);
699
700 Handle new_obj(THREAD, new_obj_oop);
701 // Caution: this involves a java upcall, so the clone should be
702 // "gc-robust" by this stage.
703 if (klass->has_finalizer()) {
704 assert(obj->is_instance(), "should be instanceOop");
705 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
706 new_obj = Handle(THREAD, new_obj_oop);
707 }
708
709 return JNIHandles::make_local(env, new_obj());
710 JVM_END
711
712 // java.io.File ///////////////////////////////////////////////////////////////
713
714 JVM_LEAF(char*, JVM_NativePath(char* path))
715 JVMWrapper("JVM_NativePath");
716 return os::native_path(path);
717 JVM_END
718
719
720 // Misc. class handling ///////////////////////////////////////////////////////////
721
722
723 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
724 JVMWrapper("JVM_GetCallerClass");
725
726 // Getting the class of the caller frame.
727 //
728 // The call stack at this point looks something like this:
729 //
730 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
731 // [1] [ @CallerSensitive API.method ]
732 // [.] [ (skipped intermediate frames) ]
733 // [n] [ caller ]
734 vframeStream vfst(thread);
735 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
736 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
737 Method* m = vfst.method();
738 assert(m != NULL, "sanity");
739 switch (n) {
740 case 0:
741 // This must only be called from Reflection.getCallerClass
742 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
743 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
744 }
745 // fall-through
746 case 1:
747 // Frame 0 and 1 must be caller sensitive.
748 if (!m->caller_sensitive()) {
749 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
750 }
751 break;
752 default:
753 if (!m->is_ignored_by_security_stack_walk()) {
754 // We have reached the desired frame; return the holder class.
755 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
756 }
757 break;
758 }
759 }
760 return NULL;
761 JVM_END
762
763
764 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
765 JVMWrapper("JVM_FindPrimitiveClass");
766 oop mirror = NULL;
767 BasicType t = name2type(utf);
768 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
769 mirror = Universe::java_mirror(t);
770 }
771 if (mirror == NULL) {
772 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
773 } else {
774 return (jclass) JNIHandles::make_local(env, mirror);
775 }
776 JVM_END
777
778
779 // Returns a class loaded by the bootstrap class loader; or null
780 // if not found. ClassNotFoundException is not thrown.
781 // FindClassFromBootLoader is exported to the launcher for windows.
782 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
783 const char* name))
784 JVMWrapper("JVM_FindClassFromBootLoader");
785
786 // Java libraries should ensure that name is never null...
787 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
788 // It's impossible to create this class; the name cannot fit
789 // into the constant pool.
790 return NULL;
791 }
792
793 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
794 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
795 if (k == NULL) {
796 return NULL;
797 }
798
799 if (log_is_enabled(Debug, class, resolve)) {
800 trace_class_resolution(k);
801 }
802 return (jclass) JNIHandles::make_local(env, k->java_mirror());
803 JVM_END
804
805 // Find a class with this name in this loader, using the caller's protection domain.
806 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
807 jboolean init, jobject loader,
808 jclass caller))
809 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
810 // Java libraries should ensure that name is never null...
811 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
812 // It's impossible to create this class; the name cannot fit
813 // into the constant pool.
814 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
815 }
816
817 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
818
819 oop loader_oop = JNIHandles::resolve(loader);
820 oop from_class = JNIHandles::resolve(caller);
821 oop protection_domain = NULL;
822 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
823 // NPE. Put it in another way, the bootstrap class loader has all permission and
824 // thus no checkPackageAccess equivalence in the VM class loader.
825 // The caller is also passed as NULL by the java code if there is no security
826 // manager to avoid the performance cost of getting the calling class.
827 if (from_class != NULL && loader_oop != NULL) {
828 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
829 }
830
831 Handle h_loader(THREAD, loader_oop);
832 Handle h_prot(THREAD, protection_domain);
833 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
834 h_prot, false, THREAD);
835
836 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
837 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
838 }
839 return result;
840 JVM_END
841
842 // Currently only called from the old verifier.
843 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
844 jboolean init, jclass from))
845 JVMWrapper("JVM_FindClassFromClass");
846 if (name == NULL) {
847 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
848 }
849 if ((int)strlen(name) > Symbol::max_length()) {
850 // It's impossible to create this class; the name cannot fit
851 // into the constant pool.
852 Exceptions::fthrow(THREAD_AND_LOCATION,
853 vmSymbols::java_lang_NoClassDefFoundError(),
854 "Class name exceeds maximum length of %d: %s",
855 Symbol::max_length(),
856 name);
857 return 0;
858 }
859 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
860 oop from_class_oop = JNIHandles::resolve(from);
861 Klass* from_class = (from_class_oop == NULL)
862 ? (Klass*)NULL
863 : java_lang_Class::as_Klass(from_class_oop);
864 oop class_loader = NULL;
865 oop protection_domain = NULL;
866 if (from_class != NULL) {
867 class_loader = from_class->class_loader();
868 protection_domain = from_class->protection_domain();
869 }
870 Handle h_loader(THREAD, class_loader);
871 Handle h_prot (THREAD, protection_domain);
872 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
873 h_prot, true, thread);
874
875 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
876 // this function is generally only used for class loading during verification.
877 ResourceMark rm;
878 oop from_mirror = JNIHandles::resolve_non_null(from);
879 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
880 const char * from_name = from_class->external_name();
881
882 oop mirror = JNIHandles::resolve_non_null(result);
883 Klass* to_class = java_lang_Class::as_Klass(mirror);
884 const char * to = to_class->external_name();
885 log_debug(class, resolve)("%s %s (verification)", from_name, to);
886 }
887
888 return result;
889 JVM_END
890
891 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
892 if (loader.is_null()) {
893 return;
894 }
895
896 // check whether the current caller thread holds the lock or not.
897 // If not, increment the corresponding counter
898 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
899 ObjectSynchronizer::owner_self) {
900 counter->inc();
901 }
902 }
903
904 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
905 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
906 jobject loader, const jbyte *buf,
907 jsize len, jobject pd, const char *source,
908 TRAPS) {
909 if (source == NULL) source = "__JVM_DefineClass__";
910
911 assert(THREAD->is_Java_thread(), "must be a JavaThread");
912 JavaThread* jt = (JavaThread*) THREAD;
913
914 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
915 ClassLoader::perf_define_appclass_selftime(),
916 ClassLoader::perf_define_appclasses(),
917 jt->get_thread_stat()->perf_recursion_counts_addr(),
918 jt->get_thread_stat()->perf_timers_addr(),
919 PerfClassTraceTime::DEFINE_CLASS);
920
921 if (UsePerfData) {
922 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
923 }
924
925 // Since exceptions can be thrown, class initialization can take place
926 // if name is NULL no check for class name in .class stream has to be made.
927 TempNewSymbol class_name = NULL;
928 if (name != NULL) {
929 const int str_len = (int)strlen(name);
930 if (str_len > Symbol::max_length()) {
931 // It's impossible to create this class; the name cannot fit
932 // into the constant pool.
933 Exceptions::fthrow(THREAD_AND_LOCATION,
934 vmSymbols::java_lang_NoClassDefFoundError(),
935 "Class name exceeds maximum length of %d: %s",
936 Symbol::max_length(),
937 name);
938 return 0;
939 }
940 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
941 }
942
943 ResourceMark rm(THREAD);
944 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
945 Handle class_loader (THREAD, JNIHandles::resolve(loader));
946 if (UsePerfData) {
947 is_lock_held_by_thread(class_loader,
948 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
949 THREAD);
950 }
951 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
952 Klass* k = SystemDictionary::resolve_from_stream(class_name,
953 class_loader,
954 protection_domain,
955 &st,
956 CHECK_NULL);
957
958 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
959 trace_class_resolution(k);
960 }
961
962 return (jclass) JNIHandles::make_local(env, k->java_mirror());
963 }
964
965
966 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
967 JVMWrapper("JVM_DefineClass");
968
969 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
970 JVM_END
971
972
973 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
974 JVMWrapper("JVM_DefineClassWithSource");
975
976 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
977 JVM_END
978
979 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
980 JVMWrapper("JVM_FindLoadedClass");
981 ResourceMark rm(THREAD);
982
983 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
984 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
985
986 const char* str = java_lang_String::as_utf8_string(string());
987 // Sanity check, don't expect null
988 if (str == NULL) return NULL;
989
990 const int str_len = (int)strlen(str);
991 if (str_len > Symbol::max_length()) {
992 // It's impossible to create this class; the name cannot fit
993 // into the constant pool.
994 return NULL;
995 }
996 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
997
998 // Security Note:
999 // The Java level wrapper will perform the necessary security check allowing
1000 // us to pass the NULL as the initiating class loader.
1001 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1002 if (UsePerfData) {
1003 is_lock_held_by_thread(h_loader,
1004 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1005 THREAD);
1006 }
1007
1008 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1009 h_loader,
1010 Handle(),
1011 CHECK_NULL);
1012 #if INCLUDE_CDS
1013 if (k == NULL) {
1014 // If the class is not already loaded, try to see if it's in the shared
1015 // archive for the current classloader (h_loader).
1016 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1017 }
1018 #endif
1019 return (k == NULL) ? NULL :
1020 (jclass) JNIHandles::make_local(env, k->java_mirror());
1021 JVM_END
1022
1023 // Module support //////////////////////////////////////////////////////////////////////////////
1024
1025 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1026 jstring location, const char* const* packages, jsize num_packages))
1027 JVMWrapper("JVM_DefineModule");
1028 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1029 JVM_END
1030
1031 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1032 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1033 Modules::set_bootloader_unnamed_module(module, CHECK);
1034 JVM_END
1035
1036 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1037 JVMWrapper("JVM_AddModuleExports");
1038 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1039 JVM_END
1040
1041 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1042 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1043 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1044 JVM_END
1045
1046 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1047 JVMWrapper("JVM_AddModuleExportsToAll");
1048 Modules::add_module_exports(from_module, package, NULL, CHECK);
1049 JVM_END
1050
1051 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1052 JVMWrapper("JVM_AddReadsModule");
1053 Modules::add_reads_module(from_module, source_module, CHECK);
1054 JVM_END
1055
1056 // Reflection support //////////////////////////////////////////////////////////////////////////////
1057
1058 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1059 assert (cls != NULL, "illegal class");
1060 JVMWrapper("JVM_InitClassName");
1061 JvmtiVMObjectAllocEventCollector oam;
1062 ResourceMark rm(THREAD);
1063 HandleMark hm(THREAD);
1064 Handle java_class(THREAD, JNIHandles::resolve(cls));
1065 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1066 return (jstring) JNIHandles::make_local(env, result);
1067 JVM_END
1068
1069
1070 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1071 JVMWrapper("JVM_GetClassInterfaces");
1072 JvmtiVMObjectAllocEventCollector oam;
1073 oop mirror = JNIHandles::resolve_non_null(cls);
1074
1075 // Special handling for primitive objects
1076 if (java_lang_Class::is_primitive(mirror)) {
1077 // Primitive objects does not have any interfaces
1078 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1079 return (jobjectArray) JNIHandles::make_local(env, r);
1080 }
1081
1082 Klass* klass = java_lang_Class::as_Klass(mirror);
1083 // Figure size of result array
1084 int size;
1085 if (klass->is_instance_klass()) {
1086 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1087 } else {
1088 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1089 size = 2;
1090 }
1091
1092 // Allocate result array
1093 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1094 objArrayHandle result (THREAD, r);
1095 // Fill in result
1096 if (klass->is_instance_klass()) {
1097 // Regular instance klass, fill in all local interfaces
1098 for (int index = 0; index < size; index++) {
1099 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1100 result->obj_at_put(index, k->java_mirror());
1101 }
1102 } else {
1103 // All arrays implement java.lang.Cloneable and java.io.Serializable
1104 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1105 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1106 }
1107 return (jobjectArray) JNIHandles::make_local(env, result());
1108 JVM_END
1109
1110
1111 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1112 JVMWrapper("JVM_IsInterface");
1113 oop mirror = JNIHandles::resolve_non_null(cls);
1114 if (java_lang_Class::is_primitive(mirror)) {
1115 return JNI_FALSE;
1116 }
1117 Klass* k = java_lang_Class::as_Klass(mirror);
1118 jboolean result = k->is_interface();
1119 assert(!result || k->is_instance_klass(),
1120 "all interfaces are instance types");
1121 // The compiler intrinsic for isInterface tests the
1122 // Klass::_access_flags bits in the same way.
1123 return result;
1124 JVM_END
1125
1126
1127 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1128 JVMWrapper("JVM_GetClassSigners");
1129 JvmtiVMObjectAllocEventCollector oam;
1130 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1131 // There are no signers for primitive types
1132 return NULL;
1133 }
1134
1135 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1136
1137 // If there are no signers set in the class, or if the class
1138 // is an array, return NULL.
1139 if (signers == NULL) return NULL;
1140
1141 // copy of the signers array
1142 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1143 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1144 for (int index = 0; index < signers->length(); index++) {
1145 signers_copy->obj_at_put(index, signers->obj_at(index));
1146 }
1147
1148 // return the copy
1149 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1150 JVM_END
1151
1152
1153 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1154 JVMWrapper("JVM_SetClassSigners");
1155 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1156 // This call is ignored for primitive types and arrays.
1157 // Signers are only set once, ClassLoader.java, and thus shouldn't
1158 // be called with an array. Only the bootstrap loader creates arrays.
1159 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1160 if (k->is_instance_klass()) {
1161 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1162 }
1163 }
1164 JVM_END
1165
1166
1167 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1168 JVMWrapper("JVM_GetProtectionDomain");
1169 if (JNIHandles::resolve(cls) == NULL) {
1170 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1171 }
1172
1173 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1174 // Primitive types does not have a protection domain.
1175 return NULL;
1176 }
1177
1178 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1179 return (jobject) JNIHandles::make_local(env, pd);
1180 JVM_END
1181
1182
1183 // Returns the inherited_access_control_context field of the running thread.
1184 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1185 JVMWrapper("JVM_GetInheritedAccessControlContext");
1186 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1187 return JNIHandles::make_local(env, result);
1188 JVM_END
1189
1190 class RegisterArrayForGC {
1191 private:
1192 JavaThread *_thread;
1193 public:
1194 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1195 _thread = thread;
1196 _thread->register_array_for_gc(array);
1197 }
1198
1199 ~RegisterArrayForGC() {
1200 _thread->register_array_for_gc(NULL);
1201 }
1202 };
1203
1204
1205 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1206 JVMWrapper("JVM_GetStackAccessControlContext");
1207 if (!UsePrivilegedStack) return NULL;
1208
1209 ResourceMark rm(THREAD);
1210 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1211 JvmtiVMObjectAllocEventCollector oam;
1212
1213 // count the protection domains on the execution stack. We collapse
1214 // duplicate consecutive protection domains into a single one, as
1215 // well as stopping when we hit a privileged frame.
1216
1217 oop previous_protection_domain = NULL;
1218 Handle privileged_context(thread, NULL);
1219 bool is_privileged = false;
1220 oop protection_domain = NULL;
1221
1222 // Iterate through Java frames
1223 vframeStream vfst(thread);
1224 for(; !vfst.at_end(); vfst.next()) {
1225 // get method of frame
1226 Method* method = vfst.method();
1227
1228 // stop at the first privileged frame
1229 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1230 method->name() == vmSymbols::executePrivileged_name())
1231 {
1232 // this frame is privileged
1233 is_privileged = true;
1234
1235 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1236
1237 StackValueCollection* locals = priv->locals();
1238 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1239 StackValue* clr_sv = locals->at(2); // Class<?> caller
1240 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1241 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1242 privileged_context = ctx_sv->get_obj();
1243 Handle caller = clr_sv->get_obj();
1244
1245 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1246 protection_domain = caller_klass->protection_domain();
1247 } else {
1248 protection_domain = method->method_holder()->protection_domain();
1249 }
1250
1251 if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1252 local_array->push(protection_domain);
1253 previous_protection_domain = protection_domain;
1254 }
1255
1256 if (is_privileged) break;
1257 }
1258
1259
1260 // either all the domains on the stack were system domains, or
1261 // we had a privileged system domain
1262 if (local_array->is_empty()) {
1263 if (is_privileged && privileged_context.is_null()) return NULL;
1264
1265 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1266 return JNIHandles::make_local(env, result);
1267 }
1268
1269 // the resource area must be registered in case of a gc
1270 RegisterArrayForGC ragc(thread, local_array);
1271 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1272 local_array->length(), CHECK_NULL);
1273 objArrayHandle h_context(thread, context);
1274 for (int index = 0; index < local_array->length(); index++) {
1275 h_context->obj_at_put(index, local_array->at(index));
1276 }
1277
1278 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1279
1280 return JNIHandles::make_local(env, result);
1281 JVM_END
1282
1283
1284 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1285 JVMWrapper("JVM_IsArrayClass");
1286 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1287 return (k != NULL) && k->is_array_klass() ? true : false;
1288 JVM_END
1289
1290
1291 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1292 JVMWrapper("JVM_IsPrimitiveClass");
1293 oop mirror = JNIHandles::resolve_non_null(cls);
1294 return (jboolean) java_lang_Class::is_primitive(mirror);
1295 JVM_END
1296
1297
1298 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1299 JVMWrapper("JVM_GetClassModifiers");
1300 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1301 // Primitive type
1302 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1303 }
1304
1305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1306 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1307 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1308 return k->modifier_flags();
1309 JVM_END
1310
1311
1312 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1313
1314 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1315 JvmtiVMObjectAllocEventCollector oam;
1316 // ofClass is a reference to a java_lang_Class object. The mirror object
1317 // of an InstanceKlass
1318
1319 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1320 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1321 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1322 return (jobjectArray)JNIHandles::make_local(env, result);
1323 }
1324
1325 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1326 InnerClassesIterator iter(k);
1327
1328 if (iter.length() == 0) {
1329 // Neither an inner nor outer class
1330 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1331 return (jobjectArray)JNIHandles::make_local(env, result);
1332 }
1333
1334 // find inner class info
1335 constantPoolHandle cp(thread, k->constants());
1336 int length = iter.length();
1337
1338 // Allocate temp. result array
1339 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1340 objArrayHandle result (THREAD, r);
1341 int members = 0;
1342
1343 for (; !iter.done(); iter.next()) {
1344 int ioff = iter.inner_class_info_index();
1345 int ooff = iter.outer_class_info_index();
1346
1347 if (ioff != 0 && ooff != 0) {
1348 // Check to see if the name matches the class we're looking for
1349 // before attempting to find the class.
1350 if (cp->klass_name_at_matches(k, ooff)) {
1351 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1352 if (outer_klass == k) {
1353 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1354 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1355
1356 // Throws an exception if outer klass has not declared k as
1357 // an inner klass
1358 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1359
1360 result->obj_at_put(members, inner_klass->java_mirror());
1361 members++;
1362 }
1363 }
1364 }
1365 }
1366
1367 if (members != length) {
1368 // Return array of right length
1369 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1370 for(int i = 0; i < members; i++) {
1371 res->obj_at_put(i, result->obj_at(i));
1372 }
1373 return (jobjectArray)JNIHandles::make_local(env, res);
1374 }
1375
1376 return (jobjectArray)JNIHandles::make_local(env, result());
1377 JVM_END
1378
1379
1380 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1381 {
1382 // ofClass is a reference to a java_lang_Class object.
1383 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1384 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1385 return NULL;
1386 }
1387
1388 bool inner_is_member = false;
1389 Klass* outer_klass
1390 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1391 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1392 if (outer_klass == NULL) return NULL; // already a top-level class
1393 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1394 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1395 }
1396 JVM_END
1397
1398 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1399 {
1400 oop mirror = JNIHandles::resolve_non_null(cls);
1401 if (java_lang_Class::is_primitive(mirror) ||
1402 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1403 return NULL;
1404 }
1405 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1406 int ooff = 0, noff = 0;
1407 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1408 if (noff != 0) {
1409 constantPoolHandle i_cp(thread, k->constants());
1410 Symbol* name = i_cp->symbol_at(noff);
1411 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1412 return (jstring) JNIHandles::make_local(env, str());
1413 }
1414 }
1415 return NULL;
1416 }
1417 JVM_END
1418
1419 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1420 assert (cls != NULL, "illegal class");
1421 JVMWrapper("JVM_GetClassSignature");
1422 JvmtiVMObjectAllocEventCollector oam;
1423 ResourceMark rm(THREAD);
1424 // Return null for arrays and primatives
1425 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1426 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1427 if (k->is_instance_klass()) {
1428 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1429 if (sym == NULL) return NULL;
1430 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1431 return (jstring) JNIHandles::make_local(env, str());
1432 }
1433 }
1434 return NULL;
1435 JVM_END
1436
1437
1438 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1439 assert (cls != NULL, "illegal class");
1440 JVMWrapper("JVM_GetClassAnnotations");
1441
1442 // Return null for arrays and primitives
1443 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1445 if (k->is_instance_klass()) {
1446 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1447 return (jbyteArray) JNIHandles::make_local(env, a);
1448 }
1449 }
1450 return NULL;
1451 JVM_END
1452
1453
1454 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1455 // some of this code was adapted from from jni_FromReflectedField
1456
1457 oop reflected = JNIHandles::resolve_non_null(field);
1458 oop mirror = java_lang_reflect_Field::clazz(reflected);
1459 Klass* k = java_lang_Class::as_Klass(mirror);
1460 int slot = java_lang_reflect_Field::slot(reflected);
1461 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1462
1463 InstanceKlass* ik = InstanceKlass::cast(k);
1464 intptr_t offset = ik->field_offset(slot);
1465
1466 if (modifiers & JVM_ACC_STATIC) {
1467 // for static fields we only look in the current class
1468 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1469 assert(false, "cannot find static field");
1470 return false;
1471 }
1472 } else {
1473 // for instance fields we start with the current class and work
1474 // our way up through the superclass chain
1475 if (!ik->find_field_from_offset(offset, false, &fd)) {
1476 assert(false, "cannot find instance field");
1477 return false;
1478 }
1479 }
1480 return true;
1481 }
1482
1483 static Method* jvm_get_method_common(jobject method) {
1484 // some of this code was adapted from from jni_FromReflectedMethod
1485
1486 oop reflected = JNIHandles::resolve_non_null(method);
1487 oop mirror = NULL;
1488 int slot = 0;
1489
1490 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1491 mirror = java_lang_reflect_Constructor::clazz(reflected);
1492 slot = java_lang_reflect_Constructor::slot(reflected);
1493 } else {
1494 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1495 "wrong type");
1496 mirror = java_lang_reflect_Method::clazz(reflected);
1497 slot = java_lang_reflect_Method::slot(reflected);
1498 }
1499 Klass* k = java_lang_Class::as_Klass(mirror);
1500
1501 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1502 assert(m != NULL, "cannot find method");
1503 return m; // caller has to deal with NULL in product mode
1504 }
1505
1506 /* Type use annotations support (JDK 1.8) */
1507
1508 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1509 assert (cls != NULL, "illegal class");
1510 JVMWrapper("JVM_GetClassTypeAnnotations");
1511 ResourceMark rm(THREAD);
1512 // Return null for arrays and primitives
1513 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1515 if (k->is_instance_klass()) {
1516 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1517 if (type_annotations != NULL) {
1518 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1519 return (jbyteArray) JNIHandles::make_local(env, a);
1520 }
1521 }
1522 }
1523 return NULL;
1524 JVM_END
1525
1526 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1527 assert (method != NULL, "illegal method");
1528 JVMWrapper("JVM_GetMethodTypeAnnotations");
1529
1530 // method is a handle to a java.lang.reflect.Method object
1531 Method* m = jvm_get_method_common(method);
1532 if (m == NULL) {
1533 return NULL;
1534 }
1535
1536 AnnotationArray* type_annotations = m->type_annotations();
1537 if (type_annotations != NULL) {
1538 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1539 return (jbyteArray) JNIHandles::make_local(env, a);
1540 }
1541
1542 return NULL;
1543 JVM_END
1544
1545 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1546 assert (field != NULL, "illegal field");
1547 JVMWrapper("JVM_GetFieldTypeAnnotations");
1548
1549 fieldDescriptor fd;
1550 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1551 if (!gotFd) {
1552 return NULL;
1553 }
1554
1555 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1556 JVM_END
1557
1558 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1559 if (!cp->is_within_bounds(index)) {
1560 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1561 }
1562 }
1563
1564 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1565 {
1566 JVMWrapper("JVM_GetMethodParameters");
1567 // method is a handle to a java.lang.reflect.Method object
1568 Method* method_ptr = jvm_get_method_common(method);
1569 methodHandle mh (THREAD, method_ptr);
1570 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1571 const int num_params = mh->method_parameters_length();
1572
1573 if (num_params < 0) {
1574 // A -1 return value from method_parameters_length means there is no
1575 // parameter data. Return null to indicate this to the reflection
1576 // API.
1577 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1578 return (jobjectArray)NULL;
1579 } else {
1580 // Otherwise, we return something up to reflection, even if it is
1581 // a zero-length array. Why? Because in some cases this can
1582 // trigger a MalformedParametersException.
1583
1584 // make sure all the symbols are properly formatted
1585 for (int i = 0; i < num_params; i++) {
1586 MethodParametersElement* params = mh->method_parameters_start();
1587 int index = params[i].name_cp_index;
1588 bounds_check(mh->constants(), index, CHECK_NULL);
1589
1590 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1591 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1592 "Wrong type at constant pool index");
1593 }
1594
1595 }
1596
1597 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1598 objArrayHandle result (THREAD, result_oop);
1599
1600 for (int i = 0; i < num_params; i++) {
1601 MethodParametersElement* params = mh->method_parameters_start();
1602 // For a 0 index, give a NULL symbol
1603 Symbol* sym = 0 != params[i].name_cp_index ?
1604 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1605 int flags = params[i].flags;
1606 oop param = Reflection::new_parameter(reflected_method, i, sym,
1607 flags, CHECK_NULL);
1608 result->obj_at_put(i, param);
1609 }
1610 return (jobjectArray)JNIHandles::make_local(env, result());
1611 }
1612 }
1613 JVM_END
1614
1615 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1616
1617 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1618 {
1619 JVMWrapper("JVM_GetClassDeclaredFields");
1620 JvmtiVMObjectAllocEventCollector oam;
1621
1622 // Exclude primitive types and array types
1623 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1624 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1625 // Return empty array
1626 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1627 return (jobjectArray) JNIHandles::make_local(env, res);
1628 }
1629
1630 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1631 constantPoolHandle cp(THREAD, k->constants());
1632
1633 // Ensure class is linked
1634 k->link_class(CHECK_NULL);
1635
1636 // Allocate result
1637 int num_fields;
1638
1639 if (publicOnly) {
1640 num_fields = 0;
1641 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1642 if (fs.access_flags().is_public()) ++num_fields;
1643 }
1644 } else {
1645 num_fields = k->java_fields_count();
1646 }
1647
1648 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1649 objArrayHandle result (THREAD, r);
1650
1651 int out_idx = 0;
1652 fieldDescriptor fd;
1653 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1654 if (!publicOnly || fs.access_flags().is_public()) {
1655 fd.reinitialize(k, fs.index());
1656 oop field = Reflection::new_field(&fd, CHECK_NULL);
1657 result->obj_at_put(out_idx, field);
1658 ++out_idx;
1659 }
1660 }
1661 assert(out_idx == num_fields, "just checking");
1662 return (jobjectArray) JNIHandles::make_local(env, result());
1663 }
1664 JVM_END
1665
1666 static bool select_method(const methodHandle& method, bool want_constructor) {
1667 if (want_constructor) {
1668 return (method->is_initializer() && !method->is_static());
1669 } else {
1670 return (!method->is_initializer() && !method->is_overpass());
1671 }
1672 }
1673
1674 static jobjectArray get_class_declared_methods_helper(
1675 JNIEnv *env,
1676 jclass ofClass, jboolean publicOnly,
1677 bool want_constructor,
1678 Klass* klass, TRAPS) {
1679
1680 JvmtiVMObjectAllocEventCollector oam;
1681
1682 // Exclude primitive types and array types
1683 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1684 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1685 // Return empty array
1686 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1687 return (jobjectArray) JNIHandles::make_local(env, res);
1688 }
1689
1690 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1691
1692 // Ensure class is linked
1693 k->link_class(CHECK_NULL);
1694
1695 Array<Method*>* methods = k->methods();
1696 int methods_length = methods->length();
1697
1698 // Save original method_idnum in case of redefinition, which can change
1699 // the idnum of obsolete methods. The new method will have the same idnum
1700 // but if we refresh the methods array, the counts will be wrong.
1701 ResourceMark rm(THREAD);
1702 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1703 int num_methods = 0;
1704
1705 for (int i = 0; i < methods_length; i++) {
1706 methodHandle method(THREAD, methods->at(i));
1707 if (select_method(method, want_constructor)) {
1708 if (!publicOnly || method->is_public()) {
1709 idnums->push(method->method_idnum());
1710 ++num_methods;
1711 }
1712 }
1713 }
1714
1715 // Allocate result
1716 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1717 objArrayHandle result (THREAD, r);
1718
1719 // Now just put the methods that we selected above, but go by their idnum
1720 // in case of redefinition. The methods can be redefined at any safepoint,
1721 // so above when allocating the oop array and below when creating reflect
1722 // objects.
1723 for (int i = 0; i < num_methods; i++) {
1724 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1725 if (method.is_null()) {
1726 // Method may have been deleted and seems this API can handle null
1727 // Otherwise should probably put a method that throws NSME
1728 result->obj_at_put(i, NULL);
1729 } else {
1730 oop m;
1731 if (want_constructor) {
1732 m = Reflection::new_constructor(method, CHECK_NULL);
1733 } else {
1734 m = Reflection::new_method(method, false, CHECK_NULL);
1735 }
1736 result->obj_at_put(i, m);
1737 }
1738 }
1739
1740 return (jobjectArray) JNIHandles::make_local(env, result());
1741 }
1742
1743 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1744 {
1745 JVMWrapper("JVM_GetClassDeclaredMethods");
1746 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1747 /*want_constructor*/ false,
1748 SystemDictionary::reflect_Method_klass(), THREAD);
1749 }
1750 JVM_END
1751
1752 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1753 {
1754 JVMWrapper("JVM_GetClassDeclaredConstructors");
1755 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1756 /*want_constructor*/ true,
1757 SystemDictionary::reflect_Constructor_klass(), THREAD);
1758 }
1759 JVM_END
1760
1761 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1762 {
1763 JVMWrapper("JVM_GetClassAccessFlags");
1764 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1765 // Primitive type
1766 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1767 }
1768
1769 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1770 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1771 }
1772 JVM_END
1773
1774 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1775 {
1776 JVMWrapper("JVM_AreNestMates");
1777 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1778 assert(c->is_instance_klass(), "must be");
1779 InstanceKlass* ck = InstanceKlass::cast(c);
1780 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1781 assert(m->is_instance_klass(), "must be");
1782 InstanceKlass* mk = InstanceKlass::cast(m);
1783 return ck->has_nestmate_access_to(mk, THREAD);
1784 }
1785 JVM_END
1786
1787 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1788 {
1789 // current is not a primitive or array class
1790 JVMWrapper("JVM_GetNestHost");
1791 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1792 assert(c->is_instance_klass(), "must be");
1793 InstanceKlass* ck = InstanceKlass::cast(c);
1794 // Don't post exceptions if validation fails
1795 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1796 return (jclass) (host == NULL ? NULL :
1797 JNIHandles::make_local(THREAD, host->java_mirror()));
1798 }
1799 JVM_END
1800
1801 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1802 {
1803 // current is not a primitive or array class
1804 JVMWrapper("JVM_GetNestMembers");
1805 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1806 assert(c->is_instance_klass(), "must be");
1807 InstanceKlass* ck = InstanceKlass::cast(c);
1808 // Get the nest host for this nest - throw ICCE if validation fails
1809 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1810 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1811
1812 {
1813 JvmtiVMObjectAllocEventCollector oam;
1814 Array<u2>* members = host->nest_members();
1815 int length = members == NULL ? 0 : members->length();
1816 // nest host is first in the array so make it one bigger
1817 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1818 length + 1, CHECK_NULL);
1819 objArrayHandle result (THREAD, r);
1820 result->obj_at_put(0, host->java_mirror());
1821 if (length != 0) {
1822 int i;
1823 for (i = 0; i < length; i++) {
1824 int cp_index = members->at(i);
1825 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1826 if (k->is_instance_klass()) {
1827 InstanceKlass* nest_host_k =
1828 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1829 if (nest_host_k == host) {
1830 result->obj_at_put(i+1, k->java_mirror());
1831 }
1832 else {
1833 // k's nest host is legal but it isn't our host so
1834 // throw ICCE
1835 ResourceMark rm(THREAD);
1836 Exceptions::fthrow(THREAD_AND_LOCATION,
1837 icce,
1838 "Nest member %s in %s declares a different nest host of %s",
1839 k->external_name(),
1840 host->external_name(),
1841 nest_host_k->external_name()
1842 );
1843 return NULL;
1844 }
1845 }
1846 else {
1847 // we have a bad nest member entry - throw ICCE
1848 ResourceMark rm(THREAD);
1849 Exceptions::fthrow(THREAD_AND_LOCATION,
1850 icce,
1851 "Class %s can not be a nest member of %s",
1852 k->external_name(),
1853 host->external_name()
1854 );
1855 return NULL;
1856 }
1857 }
1858 }
1859 else {
1860 assert(host == ck, "must be singleton nest");
1861 }
1862 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1863 }
1864 }
1865 JVM_END
1866
1867 // Constant pool access //////////////////////////////////////////////////////////
1868
1869 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1870 {
1871 JVMWrapper("JVM_GetClassConstantPool");
1872 JvmtiVMObjectAllocEventCollector oam;
1873
1874 // Return null for primitives and arrays
1875 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1876 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1877 if (k->is_instance_klass()) {
1878 InstanceKlass* k_h = InstanceKlass::cast(k);
1879 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1880 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1881 return JNIHandles::make_local(jcp());
1882 }
1883 }
1884 return NULL;
1885 }
1886 JVM_END
1887
1888
1889 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1890 {
1891 JVMWrapper("JVM_ConstantPoolGetSize");
1892 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1893 return cp->length();
1894 }
1895 JVM_END
1896
1897
1898 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1899 {
1900 JVMWrapper("JVM_ConstantPoolGetClassAt");
1901 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1902 bounds_check(cp, index, CHECK_NULL);
1903 constantTag tag = cp->tag_at(index);
1904 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1905 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1906 }
1907 Klass* k = cp->klass_at(index, CHECK_NULL);
1908 return (jclass) JNIHandles::make_local(k->java_mirror());
1909 }
1910 JVM_END
1911
1912 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1913 {
1914 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1915 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1916 bounds_check(cp, index, CHECK_NULL);
1917 constantTag tag = cp->tag_at(index);
1918 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1919 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1920 }
1921 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1922 if (k == NULL) return NULL;
1923 return (jclass) JNIHandles::make_local(k->java_mirror());
1924 }
1925 JVM_END
1926
1927 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1928 constantTag tag = cp->tag_at(index);
1929 if (!tag.is_method() && !tag.is_interface_method()) {
1930 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1931 }
1932 int klass_ref = cp->uncached_klass_ref_index_at(index);
1933 Klass* k_o;
1934 if (force_resolution) {
1935 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1936 } else {
1937 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1938 if (k_o == NULL) return NULL;
1939 }
1940 InstanceKlass* k = InstanceKlass::cast(k_o);
1941 Symbol* name = cp->uncached_name_ref_at(index);
1942 Symbol* sig = cp->uncached_signature_ref_at(index);
1943 methodHandle m (THREAD, k->find_method(name, sig));
1944 if (m.is_null()) {
1945 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1946 }
1947 oop method;
1948 if (!m->is_initializer() || m->is_static()) {
1949 method = Reflection::new_method(m, true, CHECK_NULL);
1950 } else {
1951 method = Reflection::new_constructor(m, CHECK_NULL);
1952 }
1953 return JNIHandles::make_local(method);
1954 }
1955
1956 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1957 {
1958 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1959 JvmtiVMObjectAllocEventCollector oam;
1960 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1961 bounds_check(cp, index, CHECK_NULL);
1962 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1963 return res;
1964 }
1965 JVM_END
1966
1967 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1968 {
1969 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1970 JvmtiVMObjectAllocEventCollector oam;
1971 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1972 bounds_check(cp, index, CHECK_NULL);
1973 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1974 return res;
1975 }
1976 JVM_END
1977
1978 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1979 constantTag tag = cp->tag_at(index);
1980 if (!tag.is_field()) {
1981 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1982 }
1983 int klass_ref = cp->uncached_klass_ref_index_at(index);
1984 Klass* k_o;
1985 if (force_resolution) {
1986 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1987 } else {
1988 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1989 if (k_o == NULL) return NULL;
1990 }
1991 InstanceKlass* k = InstanceKlass::cast(k_o);
1992 Symbol* name = cp->uncached_name_ref_at(index);
1993 Symbol* sig = cp->uncached_signature_ref_at(index);
1994 fieldDescriptor fd;
1995 Klass* target_klass = k->find_field(name, sig, &fd);
1996 if (target_klass == NULL) {
1997 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1998 }
1999 oop field = Reflection::new_field(&fd, CHECK_NULL);
2000 return JNIHandles::make_local(field);
2001 }
2002
2003 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2004 {
2005 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2006 JvmtiVMObjectAllocEventCollector oam;
2007 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2008 bounds_check(cp, index, CHECK_NULL);
2009 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2010 return res;
2011 }
2012 JVM_END
2013
2014 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2015 {
2016 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2017 JvmtiVMObjectAllocEventCollector oam;
2018 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2019 bounds_check(cp, index, CHECK_NULL);
2020 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2021 return res;
2022 }
2023 JVM_END
2024
2025 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2026 {
2027 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2028 JvmtiVMObjectAllocEventCollector oam;
2029 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2030 bounds_check(cp, index, CHECK_NULL);
2031 constantTag tag = cp->tag_at(index);
2032 if (!tag.is_field_or_method()) {
2033 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2034 }
2035 int klass_ref = cp->uncached_klass_ref_index_at(index);
2036 Symbol* klass_name = cp->klass_name_at(klass_ref);
2037 Symbol* member_name = cp->uncached_name_ref_at(index);
2038 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2039 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2040 objArrayHandle dest(THREAD, dest_o);
2041 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2042 dest->obj_at_put(0, str());
2043 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2044 dest->obj_at_put(1, str());
2045 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2046 dest->obj_at_put(2, str());
2047 return (jobjectArray) JNIHandles::make_local(dest());
2048 }
2049 JVM_END
2050
2051 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2052 {
2053 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2054 JvmtiVMObjectAllocEventCollector oam;
2055 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2056 bounds_check(cp, index, CHECK_0);
2057 constantTag tag = cp->tag_at(index);
2058 if (!tag.is_field_or_method()) {
2059 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2060 }
2061 return (jint) cp->uncached_klass_ref_index_at(index);
2062 }
2063 JVM_END
2064
2065 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2066 {
2067 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2068 JvmtiVMObjectAllocEventCollector oam;
2069 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2070 bounds_check(cp, index, CHECK_0);
2071 constantTag tag = cp->tag_at(index);
2072 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2073 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2074 }
2075 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2076 }
2077 JVM_END
2078
2079 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2080 {
2081 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2082 JvmtiVMObjectAllocEventCollector oam;
2083 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2084 bounds_check(cp, index, CHECK_NULL);
2085 constantTag tag = cp->tag_at(index);
2086 if (!tag.is_name_and_type()) {
2087 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2088 }
2089 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2090 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2091 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2092 objArrayHandle dest(THREAD, dest_o);
2093 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2094 dest->obj_at_put(0, str());
2095 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2096 dest->obj_at_put(1, str());
2097 return (jobjectArray) JNIHandles::make_local(dest());
2098 }
2099 JVM_END
2100
2101 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2102 {
2103 JVMWrapper("JVM_ConstantPoolGetIntAt");
2104 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2105 bounds_check(cp, index, CHECK_0);
2106 constantTag tag = cp->tag_at(index);
2107 if (!tag.is_int()) {
2108 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2109 }
2110 return cp->int_at(index);
2111 }
2112 JVM_END
2113
2114 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2115 {
2116 JVMWrapper("JVM_ConstantPoolGetLongAt");
2117 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2118 bounds_check(cp, index, CHECK_(0L));
2119 constantTag tag = cp->tag_at(index);
2120 if (!tag.is_long()) {
2121 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2122 }
2123 return cp->long_at(index);
2124 }
2125 JVM_END
2126
2127 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2128 {
2129 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2130 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2131 bounds_check(cp, index, CHECK_(0.0f));
2132 constantTag tag = cp->tag_at(index);
2133 if (!tag.is_float()) {
2134 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2135 }
2136 return cp->float_at(index);
2137 }
2138 JVM_END
2139
2140 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2141 {
2142 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2143 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2144 bounds_check(cp, index, CHECK_(0.0));
2145 constantTag tag = cp->tag_at(index);
2146 if (!tag.is_double()) {
2147 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2148 }
2149 return cp->double_at(index);
2150 }
2151 JVM_END
2152
2153 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2154 {
2155 JVMWrapper("JVM_ConstantPoolGetStringAt");
2156 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2157 bounds_check(cp, index, CHECK_NULL);
2158 constantTag tag = cp->tag_at(index);
2159 if (!tag.is_string()) {
2160 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2161 }
2162 oop str = cp->string_at(index, CHECK_NULL);
2163 return (jstring) JNIHandles::make_local(str);
2164 }
2165 JVM_END
2166
2167 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2168 {
2169 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2170 JvmtiVMObjectAllocEventCollector oam;
2171 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2172 bounds_check(cp, index, CHECK_NULL);
2173 constantTag tag = cp->tag_at(index);
2174 if (!tag.is_symbol()) {
2175 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2176 }
2177 Symbol* sym = cp->symbol_at(index);
2178 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2179 return (jstring) JNIHandles::make_local(str());
2180 }
2181 JVM_END
2182
2183 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2184 {
2185 JVMWrapper("JVM_ConstantPoolGetTagAt");
2186 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2187 bounds_check(cp, index, CHECK_0);
2188 constantTag tag = cp->tag_at(index);
2189 jbyte result = tag.value();
2190 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2191 // they are changed to the corresponding tags from the JVM spec, so that java code in
2192 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2193 if (tag.is_klass_or_reference()) {
2194 result = JVM_CONSTANT_Class;
2195 } else if (tag.is_string_index()) {
2196 result = JVM_CONSTANT_String;
2197 } else if (tag.is_method_type_in_error()) {
2198 result = JVM_CONSTANT_MethodType;
2199 } else if (tag.is_method_handle_in_error()) {
2200 result = JVM_CONSTANT_MethodHandle;
2201 } else if (tag.is_dynamic_constant_in_error()) {
2202 result = JVM_CONSTANT_Dynamic;
2203 }
2204 return result;
2205 }
2206 JVM_END
2207
2208 // Assertion support. //////////////////////////////////////////////////////////
2209
2210 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2211 JVMWrapper("JVM_DesiredAssertionStatus");
2212 assert(cls != NULL, "bad class");
2213
2214 oop r = JNIHandles::resolve(cls);
2215 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2216 if (java_lang_Class::is_primitive(r)) return false;
2217
2218 Klass* k = java_lang_Class::as_Klass(r);
2219 assert(k->is_instance_klass(), "must be an instance klass");
2220 if (!k->is_instance_klass()) return false;
2221
2222 ResourceMark rm(THREAD);
2223 const char* name = k->name()->as_C_string();
2224 bool system_class = k->class_loader() == NULL;
2225 return JavaAssertions::enabled(name, system_class);
2226
2227 JVM_END
2228
2229
2230 // Return a new AssertionStatusDirectives object with the fields filled in with
2231 // command-line assertion arguments (i.e., -ea, -da).
2232 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2233 JVMWrapper("JVM_AssertionStatusDirectives");
2234 JvmtiVMObjectAllocEventCollector oam;
2235 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2236 return JNIHandles::make_local(env, asd);
2237 JVM_END
2238
2239 // Verification ////////////////////////////////////////////////////////////////////////////////
2240
2241 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2242
2243 // RedefineClasses support: bug 6214132 caused verification to fail.
2244 // All functions from this section should call the jvmtiThreadSate function:
2245 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2246 // The function returns a Klass* of the _scratch_class if the verifier
2247 // was invoked in the middle of the class redefinition.
2248 // Otherwise it returns its argument value which is the _the_class Klass*.
2249 // Please, refer to the description in the jvmtiThreadSate.hpp.
2250
2251 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2252 JVMWrapper("JVM_GetClassNameUTF");
2253 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2254 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2255 return k->name()->as_utf8();
2256 JVM_END
2257
2258
2259 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2260 JVMWrapper("JVM_GetClassCPTypes");
2261 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2262 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2263 // types will have length zero if this is not an InstanceKlass
2264 // (length is determined by call to JVM_GetClassCPEntriesCount)
2265 if (k->is_instance_klass()) {
2266 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2267 for (int index = cp->length() - 1; index >= 0; index--) {
2268 constantTag tag = cp->tag_at(index);
2269 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2270 }
2271 }
2272 JVM_END
2273
2274
2275 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2276 JVMWrapper("JVM_GetClassCPEntriesCount");
2277 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2278 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2279 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2280 JVM_END
2281
2282
2283 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2284 JVMWrapper("JVM_GetClassFieldsCount");
2285 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2286 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2287 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2288 JVM_END
2289
2290
2291 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2292 JVMWrapper("JVM_GetClassMethodsCount");
2293 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2294 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2295 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2296 JVM_END
2297
2298
2299 // The following methods, used for the verifier, are never called with
2300 // array klasses, so a direct cast to InstanceKlass is safe.
2301 // Typically, these methods are called in a loop with bounds determined
2302 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2303 // zero for arrays.
2304 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2305 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2307 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2308 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2309 int length = method->checked_exceptions_length();
2310 if (length > 0) {
2311 CheckedExceptionElement* table= method->checked_exceptions_start();
2312 for (int i = 0; i < length; i++) {
2313 exceptions[i] = table[i].class_cp_index;
2314 }
2315 }
2316 JVM_END
2317
2318
2319 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2320 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2321 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2324 return method->checked_exceptions_length();
2325 JVM_END
2326
2327
2328 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2329 JVMWrapper("JVM_GetMethodIxByteCode");
2330 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2331 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2332 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2333 memcpy(code, method->code_base(), method->code_size());
2334 JVM_END
2335
2336
2337 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2338 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2339 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2342 return method->code_size();
2343 JVM_END
2344
2345
2346 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2347 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2348 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2349 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2350 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2351 ExceptionTable extable(method);
2352 entry->start_pc = extable.start_pc(entry_index);
2353 entry->end_pc = extable.end_pc(entry_index);
2354 entry->handler_pc = extable.handler_pc(entry_index);
2355 entry->catchType = extable.catch_type_index(entry_index);
2356 JVM_END
2357
2358
2359 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2360 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2361 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2362 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2363 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2364 return method->exception_table_length();
2365 JVM_END
2366
2367
2368 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2369 JVMWrapper("JVM_GetMethodIxModifiers");
2370 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2371 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2372 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2373 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2374 JVM_END
2375
2376
2377 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2378 JVMWrapper("JVM_GetFieldIxModifiers");
2379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2382 JVM_END
2383
2384
2385 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2386 JVMWrapper("JVM_GetMethodIxLocalsCount");
2387 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2388 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2389 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2390 return method->max_locals();
2391 JVM_END
2392
2393
2394 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2395 JVMWrapper("JVM_GetMethodIxArgsSize");
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 return method->size_of_parameters();
2400 JVM_END
2401
2402
2403 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2404 JVMWrapper("JVM_GetMethodIxMaxStack");
2405 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2408 return method->verifier_max_stack();
2409 JVM_END
2410
2411
2412 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2413 JVMWrapper("JVM_IsConstructorIx");
2414 ResourceMark rm(THREAD);
2415 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2416 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2417 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2418 return method->name() == vmSymbols::object_initializer_name();
2419 JVM_END
2420
2421
2422 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2423 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2424 ResourceMark rm(THREAD);
2425 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2426 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2427 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2428 return method->is_overpass();
2429 JVM_END
2430
2431 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2432 JVMWrapper("JVM_GetMethodIxIxUTF");
2433 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2434 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2435 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2436 return method->name()->as_utf8();
2437 JVM_END
2438
2439
2440 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2441 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2442 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2443 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2445 return method->signature()->as_utf8();
2446 JVM_END
2447
2448 /**
2449 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2450 * read entries in the constant pool. Since the old verifier always
2451 * works on a copy of the code, it will not see any rewriting that
2452 * may possibly occur in the middle of verification. So it is important
2453 * that nothing it calls tries to use the cpCache instead of the raw
2454 * constant pool, so we must use cp->uncached_x methods when appropriate.
2455 */
2456 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2457 JVMWrapper("JVM_GetCPFieldNameUTF");
2458 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2459 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2460 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2461 switch (cp->tag_at(cp_index).value()) {
2462 case JVM_CONSTANT_Fieldref:
2463 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2464 default:
2465 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2466 }
2467 ShouldNotReachHere();
2468 return NULL;
2469 JVM_END
2470
2471
2472 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2473 JVMWrapper("JVM_GetCPMethodNameUTF");
2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2476 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2477 switch (cp->tag_at(cp_index).value()) {
2478 case JVM_CONSTANT_InterfaceMethodref:
2479 case JVM_CONSTANT_Methodref:
2480 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2481 default:
2482 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2483 }
2484 ShouldNotReachHere();
2485 return NULL;
2486 JVM_END
2487
2488
2489 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2490 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2491 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2492 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2493 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2494 switch (cp->tag_at(cp_index).value()) {
2495 case JVM_CONSTANT_InterfaceMethodref:
2496 case JVM_CONSTANT_Methodref:
2497 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2498 default:
2499 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2500 }
2501 ShouldNotReachHere();
2502 return NULL;
2503 JVM_END
2504
2505
2506 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2507 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2508 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2509 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2510 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2511 switch (cp->tag_at(cp_index).value()) {
2512 case JVM_CONSTANT_Fieldref:
2513 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2514 default:
2515 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2516 }
2517 ShouldNotReachHere();
2518 return NULL;
2519 JVM_END
2520
2521
2522 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2523 JVMWrapper("JVM_GetCPClassNameUTF");
2524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2525 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2526 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2527 Symbol* classname = cp->klass_name_at(cp_index);
2528 return classname->as_utf8();
2529 JVM_END
2530
2531
2532 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2533 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2535 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2536 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2537 switch (cp->tag_at(cp_index).value()) {
2538 case JVM_CONSTANT_Fieldref: {
2539 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2540 Symbol* classname = cp->klass_name_at(class_index);
2541 return classname->as_utf8();
2542 }
2543 default:
2544 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2545 }
2546 ShouldNotReachHere();
2547 return NULL;
2548 JVM_END
2549
2550
2551 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2552 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2553 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2554 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2555 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2556 switch (cp->tag_at(cp_index).value()) {
2557 case JVM_CONSTANT_Methodref:
2558 case JVM_CONSTANT_InterfaceMethodref: {
2559 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2560 Symbol* classname = cp->klass_name_at(class_index);
2561 return classname->as_utf8();
2562 }
2563 default:
2564 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2565 }
2566 ShouldNotReachHere();
2567 return NULL;
2568 JVM_END
2569
2570
2571 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2572 JVMWrapper("JVM_GetCPFieldModifiers");
2573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2579 switch (cp->tag_at(cp_index).value()) {
2580 case JVM_CONSTANT_Fieldref: {
2581 Symbol* name = cp->uncached_name_ref_at(cp_index);
2582 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2583 InstanceKlass* ik = InstanceKlass::cast(k_called);
2584 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2585 if (fs.name() == name && fs.signature() == signature) {
2586 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2587 }
2588 }
2589 return -1;
2590 }
2591 default:
2592 fatal("JVM_GetCPFieldModifiers: illegal constant");
2593 }
2594 ShouldNotReachHere();
2595 return 0;
2596 JVM_END
2597
2598
2599 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2600 JVMWrapper("JVM_GetCPMethodModifiers");
2601 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2602 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2603 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2604 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2605 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2606 switch (cp->tag_at(cp_index).value()) {
2607 case JVM_CONSTANT_Methodref:
2608 case JVM_CONSTANT_InterfaceMethodref: {
2609 Symbol* name = cp->uncached_name_ref_at(cp_index);
2610 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2611 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2612 int methods_count = methods->length();
2613 for (int i = 0; i < methods_count; i++) {
2614 Method* method = methods->at(i);
2615 if (method->name() == name && method->signature() == signature) {
2616 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2617 }
2618 }
2619 return -1;
2620 }
2621 default:
2622 fatal("JVM_GetCPMethodModifiers: illegal constant");
2623 }
2624 ShouldNotReachHere();
2625 return 0;
2626 JVM_END
2627
2628
2629 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2630
2631 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2632 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2633 JVM_END
2634
2635
2636 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2637 JVMWrapper("JVM_IsSameClassPackage");
2638 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2639 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2640 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2641 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2642 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2643 JVM_END
2644
2645 // Printing support //////////////////////////////////////////////////
2646 extern "C" {
2647
2648 ATTRIBUTE_PRINTF(3, 0)
2649 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2650 // Reject count values that are negative signed values converted to
2651 // unsigned; see bug 4399518, 4417214
2652 if ((intptr_t)count <= 0) return -1;
2653
2654 int result = os::vsnprintf(str, count, fmt, args);
2655 if (result > 0 && (size_t)result >= count) {
2656 result = -1;
2657 }
2658
2659 return result;
2660 }
2661
2662 ATTRIBUTE_PRINTF(3, 4)
2663 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2664 va_list args;
2665 int len;
2666 va_start(args, fmt);
2667 len = jio_vsnprintf(str, count, fmt, args);
2668 va_end(args);
2669 return len;
2670 }
2671
2672 ATTRIBUTE_PRINTF(2, 3)
2673 int jio_fprintf(FILE* f, const char *fmt, ...) {
2674 int len;
2675 va_list args;
2676 va_start(args, fmt);
2677 len = jio_vfprintf(f, fmt, args);
2678 va_end(args);
2679 return len;
2680 }
2681
2682 ATTRIBUTE_PRINTF(2, 0)
2683 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2684 if (Arguments::vfprintf_hook() != NULL) {
2685 return Arguments::vfprintf_hook()(f, fmt, args);
2686 } else {
2687 return vfprintf(f, fmt, args);
2688 }
2689 }
2690
2691 ATTRIBUTE_PRINTF(1, 2)
2692 JNIEXPORT int jio_printf(const char *fmt, ...) {
2693 int len;
2694 va_list args;
2695 va_start(args, fmt);
2696 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2697 va_end(args);
2698 return len;
2699 }
2700
2701 // HotSpot specific jio method
2702 void jio_print(const char* s, size_t len) {
2703 // Try to make this function as atomic as possible.
2704 if (Arguments::vfprintf_hook() != NULL) {
2705 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2706 } else {
2707 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2708 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2709 }
2710 }
2711
2712 } // Extern C
2713
2714 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2715
2716 // In most of the JVM thread support functions we need to access the
2717 // thread through a ThreadsListHandle to prevent it from exiting and
2718 // being reclaimed while we try to operate on it. The exceptions to this
2719 // rule are when operating on the current thread, or if the monitor of
2720 // the target java.lang.Thread is locked at the Java level - in both
2721 // cases the target cannot exit.
2722
2723 static void thread_entry(JavaThread* thread, TRAPS) {
2724 HandleMark hm(THREAD);
2725 Handle obj(THREAD, thread->threadObj());
2726 JavaValue result(T_VOID);
2727 JavaCalls::call_virtual(&result,
2728 obj,
2729 SystemDictionary::Thread_klass(),
2730 vmSymbols::run_method_name(),
2731 vmSymbols::void_method_signature(),
2732 THREAD);
2733 }
2734
2735
2736 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2737 JVMWrapper("JVM_StartThread");
2738 JavaThread *native_thread = NULL;
2739
2740 // We cannot hold the Threads_lock when we throw an exception,
2741 // due to rank ordering issues. Example: we might need to grab the
2742 // Heap_lock while we construct the exception.
2743 bool throw_illegal_thread_state = false;
2744
2745 // We must release the Threads_lock before we can post a jvmti event
2746 // in Thread::start.
2747 {
2748 // Ensure that the C++ Thread and OSThread structures aren't freed before
2749 // we operate.
2750 MutexLocker mu(Threads_lock);
2751
2752 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2753 // re-starting an already started thread, so we should usually find
2754 // that the JavaThread is null. However for a JNI attached thread
2755 // there is a small window between the Thread object being created
2756 // (with its JavaThread set) and the update to its threadStatus, so we
2757 // have to check for this
2758 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2759 throw_illegal_thread_state = true;
2760 } else {
2761 // We could also check the stillborn flag to see if this thread was already stopped, but
2762 // for historical reasons we let the thread detect that itself when it starts running
2763
2764 jlong size =
2765 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2766 // Allocate the C++ Thread structure and create the native thread. The
2767 // stack size retrieved from java is 64-bit signed, but the constructor takes
2768 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2769 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2770 // - Avoid passing negative values which would result in really large stacks.
2771 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2772 size_t sz = size > 0 ? (size_t) size : 0;
2773 native_thread = new JavaThread(&thread_entry, sz);
2774
2775 // At this point it may be possible that no osthread was created for the
2776 // JavaThread due to lack of memory. Check for this situation and throw
2777 // an exception if necessary. Eventually we may want to change this so
2778 // that we only grab the lock if the thread was created successfully -
2779 // then we can also do this check and throw the exception in the
2780 // JavaThread constructor.
2781 if (native_thread->osthread() != NULL) {
2782 // Note: the current thread is not being used within "prepare".
2783 native_thread->prepare(jthread);
2784 }
2785 }
2786 }
2787
2788 if (throw_illegal_thread_state) {
2789 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2790 }
2791
2792 assert(native_thread != NULL, "Starting null thread?");
2793
2794 if (native_thread->osthread() == NULL) {
2795 // No one should hold a reference to the 'native_thread'.
2796 native_thread->smr_delete();
2797 if (JvmtiExport::should_post_resource_exhausted()) {
2798 JvmtiExport::post_resource_exhausted(
2799 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2800 os::native_thread_creation_failed_msg());
2801 }
2802 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2803 os::native_thread_creation_failed_msg());
2804 }
2805
2806 Thread::start(native_thread);
2807
2808 JVM_END
2809
2810
2811 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2812 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2813 // but is thought to be reliable and simple. In the case, where the receiver is the
2814 // same thread as the sender, no VM_Operation is needed.
2815 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2816 JVMWrapper("JVM_StopThread");
2817
2818 // A nested ThreadsListHandle will grab the Threads_lock so create
2819 // tlh before we resolve throwable.
2820 ThreadsListHandle tlh(thread);
2821 oop java_throwable = JNIHandles::resolve(throwable);
2822 if (java_throwable == NULL) {
2823 THROW(vmSymbols::java_lang_NullPointerException());
2824 }
2825 oop java_thread = NULL;
2826 JavaThread* receiver = NULL;
2827 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2828 Events::log_exception(thread,
2829 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2830 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2831
2832 if (is_alive) {
2833 // jthread refers to a live JavaThread.
2834 if (thread == receiver) {
2835 // Exception is getting thrown at self so no VM_Operation needed.
2836 THROW_OOP(java_throwable);
2837 } else {
2838 // Use a VM_Operation to throw the exception.
2839 Thread::send_async_exception(java_thread, java_throwable);
2840 }
2841 } else {
2842 // Either:
2843 // - target thread has not been started before being stopped, or
2844 // - target thread already terminated
2845 // We could read the threadStatus to determine which case it is
2846 // but that is overkill as it doesn't matter. We must set the
2847 // stillborn flag for the first case, and if the thread has already
2848 // exited setting this flag has no effect.
2849 java_lang_Thread::set_stillborn(java_thread);
2850 }
2851 JVM_END
2852
2853
2854 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2855 JVMWrapper("JVM_IsThreadAlive");
2856
2857 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2858 return java_lang_Thread::is_alive(thread_oop);
2859 JVM_END
2860
2861
2862 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2863 JVMWrapper("JVM_SuspendThread");
2864
2865 ThreadsListHandle tlh(thread);
2866 JavaThread* receiver = NULL;
2867 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2868 if (is_alive) {
2869 // jthread refers to a live JavaThread.
2870 {
2871 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2872 if (receiver->is_external_suspend()) {
2873 // Don't allow nested external suspend requests. We can't return
2874 // an error from this interface so just ignore the problem.
2875 return;
2876 }
2877 if (receiver->is_exiting()) { // thread is in the process of exiting
2878 return;
2879 }
2880 receiver->set_external_suspend();
2881 }
2882
2883 // java_suspend() will catch threads in the process of exiting
2884 // and will ignore them.
2885 receiver->java_suspend();
2886
2887 // It would be nice to have the following assertion in all the
2888 // time, but it is possible for a racing resume request to have
2889 // resumed this thread right after we suspended it. Temporarily
2890 // enable this assertion if you are chasing a different kind of
2891 // bug.
2892 //
2893 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2894 // receiver->is_being_ext_suspended(), "thread is not suspended");
2895 }
2896 JVM_END
2897
2898
2899 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2900 JVMWrapper("JVM_ResumeThread");
2901
2902 ThreadsListHandle tlh(thread);
2903 JavaThread* receiver = NULL;
2904 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2905 if (is_alive) {
2906 // jthread refers to a live JavaThread.
2907
2908 // This is the original comment for this Threads_lock grab:
2909 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2910 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2911 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2912 // looks at it.
2913 //
2914 // The above comment dates back to when we had both internal and
2915 // external suspend APIs that shared a common underlying mechanism.
2916 // External suspend is now entirely cooperative and doesn't share
2917 // anything with internal suspend. That said, there are some
2918 // assumptions in the VM that an external resume grabs the
2919 // Threads_lock. We can't drop the Threads_lock grab here until we
2920 // resolve the assumptions that exist elsewhere.
2921 //
2922 MutexLocker ml(Threads_lock);
2923 receiver->java_resume();
2924 }
2925 JVM_END
2926
2927
2928 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2929 JVMWrapper("JVM_SetThreadPriority");
2930
2931 ThreadsListHandle tlh(thread);
2932 oop java_thread = NULL;
2933 JavaThread* receiver = NULL;
2934 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2935 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2936
2937 if (is_alive) {
2938 // jthread refers to a live JavaThread.
2939 Thread::set_priority(receiver, (ThreadPriority)prio);
2940 }
2941 // Implied else: If the JavaThread hasn't started yet, then the
2942 // priority set in the java.lang.Thread object above will be pushed
2943 // down when it does start.
2944 JVM_END
2945
2946
2947 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2948 JVMWrapper("JVM_Yield");
2949 if (os::dont_yield()) return;
2950 HOTSPOT_THREAD_YIELD();
2951 os::naked_yield();
2952 JVM_END
2953
2954 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2955 assert(event != NULL, "invariant");
2956 assert(event->should_commit(), "invariant");
2957 event->set_time(millis);
2958 event->commit();
2959 }
2960
2961 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2962 JVMWrapper("JVM_Sleep");
2963
2964 if (millis < 0) {
2965 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2966 }
2967
2968 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2969 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2970 }
2971
2972 // Save current thread state and restore it at the end of this block.
2973 // And set new thread state to SLEEPING.
2974 JavaThreadSleepState jtss(thread);
2975
2976 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2977 EventThreadSleep event;
2978
2979 if (millis == 0) {
2980 os::naked_yield();
2981 } else {
2982 ThreadState old_state = thread->osthread()->get_state();
2983 thread->osthread()->set_state(SLEEPING);
2984 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2985 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2986 // us while we were sleeping. We do not overwrite those.
2987 if (!HAS_PENDING_EXCEPTION) {
2988 if (event.should_commit()) {
2989 post_thread_sleep_event(&event, millis);
2990 }
2991 HOTSPOT_THREAD_SLEEP_END(1);
2992
2993 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2994 // to properly restore the thread state. That's likely wrong.
2995 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2996 }
2997 }
2998 thread->osthread()->set_state(old_state);
2999 }
3000 if (event.should_commit()) {
3001 post_thread_sleep_event(&event, millis);
3002 }
3003 HOTSPOT_THREAD_SLEEP_END(0);
3004 JVM_END
3005
3006 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3007 JVMWrapper("JVM_CurrentThread");
3008 oop jthread = thread->threadObj();
3009 assert (thread != NULL, "no current thread!");
3010 return JNIHandles::make_local(env, jthread);
3011 JVM_END
3012
3013
3014 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3015 JVMWrapper("JVM_CountStackFrames");
3016
3017 uint32_t debug_bits = 0;
3018 ThreadsListHandle tlh(thread);
3019 JavaThread* receiver = NULL;
3020 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3021 int count = 0;
3022 if (is_alive) {
3023 // jthread refers to a live JavaThread.
3024 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3025 // Count all java activation, i.e., number of vframes.
3026 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3027 // Native frames are not counted.
3028 if (!vfst.method()->is_native()) count++;
3029 }
3030 } else {
3031 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3032 "this thread is not suspended");
3033 }
3034 }
3035 // Implied else: if JavaThread is not alive simply return a count of 0.
3036
3037 return count;
3038 JVM_END
3039
3040
3041 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3042 JVMWrapper("JVM_Interrupt");
3043
3044 ThreadsListHandle tlh(thread);
3045 JavaThread* receiver = NULL;
3046 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3047 if (is_alive) {
3048 // jthread refers to a live JavaThread.
3049 Thread::interrupt(receiver);
3050 }
3051 JVM_END
3052
3053
3054 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3055 JVMWrapper("JVM_IsInterrupted");
3056
3057 ThreadsListHandle tlh(thread);
3058 JavaThread* receiver = NULL;
3059 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3060 if (is_alive) {
3061 // jthread refers to a live JavaThread.
3062 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3063 } else {
3064 return JNI_FALSE;
3065 }
3066 JVM_END
3067
3068
3069 // Return true iff the current thread has locked the object passed in
3070
3071 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3072 JVMWrapper("JVM_HoldsLock");
3073 assert(THREAD->is_Java_thread(), "sanity check");
3074 if (obj == NULL) {
3075 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3076 }
3077 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3078 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3079 JVM_END
3080
3081
3082 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3083 JVMWrapper("JVM_DumpAllStacks");
3084 VM_PrintThreads op;
3085 VMThread::execute(&op);
3086 if (JvmtiExport::should_post_data_dump()) {
3087 JvmtiExport::post_data_dump();
3088 }
3089 JVM_END
3090
3091 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3092 JVMWrapper("JVM_SetNativeThreadName");
3093
3094 // We don't use a ThreadsListHandle here because the current thread
3095 // must be alive.
3096 oop java_thread = JNIHandles::resolve_non_null(jthread);
3097 JavaThread* thr = java_lang_Thread::thread(java_thread);
3098 if (thread == thr && !thr->has_attached_via_jni()) {
3099 // Thread naming is only supported for the current thread and
3100 // we don't set the name of an attached thread to avoid stepping
3101 // on other programs.
3102 ResourceMark rm(thread);
3103 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3104 os::set_native_thread_name(thread_name);
3105 }
3106 JVM_END
3107
3108 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3109
3110 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3111 JVMWrapper("JVM_GetClassContext");
3112 ResourceMark rm(THREAD);
3113 JvmtiVMObjectAllocEventCollector oam;
3114 vframeStream vfst(thread);
3115
3116 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3117 // This must only be called from SecurityManager.getClassContext
3118 Method* m = vfst.method();
3119 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3120 m->name() == vmSymbols::getClassContext_name() &&
3121 m->signature() == vmSymbols::void_class_array_signature())) {
3122 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3123 }
3124 }
3125
3126 // Collect method holders
3127 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3128 for (; !vfst.at_end(); vfst.security_next()) {
3129 Method* m = vfst.method();
3130 // Native frames are not returned
3131 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3132 Klass* holder = m->method_holder();
3133 assert(holder->is_klass(), "just checking");
3134 klass_array->append(holder);
3135 }
3136 }
3137
3138 // Create result array of type [Ljava/lang/Class;
3139 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3140 // Fill in mirrors corresponding to method holders
3141 for (int i = 0; i < klass_array->length(); i++) {
3142 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3143 }
3144
3145 return (jobjectArray) JNIHandles::make_local(env, result);
3146 JVM_END
3147
3148
3149 // java.lang.Package ////////////////////////////////////////////////////////////////
3150
3151
3152 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3153 JVMWrapper("JVM_GetSystemPackage");
3154 ResourceMark rm(THREAD);
3155 JvmtiVMObjectAllocEventCollector oam;
3156 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3157 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3158 return (jstring) JNIHandles::make_local(result);
3159 JVM_END
3160
3161
3162 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3163 JVMWrapper("JVM_GetSystemPackages");
3164 JvmtiVMObjectAllocEventCollector oam;
3165 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3166 return (jobjectArray) JNIHandles::make_local(result);
3167 JVM_END
3168
3169
3170 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3171
3172
3173 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3174 JVMWrapper("JVM_GetAndClearReferencePendingList");
3175
3176 MonitorLockerEx ml(Heap_lock);
3177 oop ref = Universe::reference_pending_list();
3178 if (ref != NULL) {
3179 Universe::set_reference_pending_list(NULL);
3180 }
3181 return JNIHandles::make_local(env, ref);
3182 JVM_END
3183
3184 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3185 JVMWrapper("JVM_HasReferencePendingList");
3186 MonitorLockerEx ml(Heap_lock);
3187 return Universe::has_reference_pending_list();
3188 JVM_END
3189
3190 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3191 JVMWrapper("JVM_WaitForReferencePendingList");
3192 MonitorLockerEx ml(Heap_lock);
3193 while (!Universe::has_reference_pending_list()) {
3194 ml.wait();
3195 }
3196 JVM_END
3197
3198
3199 // ObjectInputStream ///////////////////////////////////////////////////////////////
3200
3201 // Return the first user-defined class loader up the execution stack, or null
3202 // if only code from the bootstrap or platform class loader is on the stack.
3203
3204 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3205 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3206 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3207 oop loader = vfst.method()->method_holder()->class_loader();
3208 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3209 return JNIHandles::make_local(env, loader);
3210 }
3211 }
3212 return NULL;
3213 JVM_END
3214
3215
3216 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3217
3218
3219 // resolve array handle and check arguments
3220 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3221 if (arr == NULL) {
3222 THROW_0(vmSymbols::java_lang_NullPointerException());
3223 }
3224 oop a = JNIHandles::resolve_non_null(arr);
3225 if (!a->is_array()) {
3226 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3227 } else if (type_array_only && !a->is_typeArray()) {
3228 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3229 }
3230 return arrayOop(a);
3231 }
3232
3233
3234 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3235 JVMWrapper("JVM_GetArrayLength");
3236 arrayOop a = check_array(env, arr, false, CHECK_0);
3237 return a->length();
3238 JVM_END
3239
3240
3241 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3242 JVMWrapper("JVM_Array_Get");
3243 JvmtiVMObjectAllocEventCollector oam;
3244 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3245 jvalue value;
3246 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3247 oop box = Reflection::box(&value, type, CHECK_NULL);
3248 return JNIHandles::make_local(env, box);
3249 JVM_END
3250
3251
3252 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3253 JVMWrapper("JVM_GetPrimitiveArrayElement");
3254 jvalue value;
3255 value.i = 0; // to initialize value before getting used in CHECK
3256 arrayOop a = check_array(env, arr, true, CHECK_(value));
3257 assert(a->is_typeArray(), "just checking");
3258 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3259 BasicType wide_type = (BasicType) wCode;
3260 if (type != wide_type) {
3261 Reflection::widen(&value, type, wide_type, CHECK_(value));
3262 }
3263 return value;
3264 JVM_END
3265
3266
3267 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3268 JVMWrapper("JVM_SetArrayElement");
3269 arrayOop a = check_array(env, arr, false, CHECK);
3270 oop box = JNIHandles::resolve(val);
3271 jvalue value;
3272 value.i = 0; // to initialize value before getting used in CHECK
3273 BasicType value_type;
3274 if (a->is_objArray()) {
3275 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3276 value_type = Reflection::unbox_for_regular_object(box, &value);
3277 } else {
3278 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3279 }
3280 Reflection::array_set(&value, a, index, value_type, CHECK);
3281 JVM_END
3282
3283
3284 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3285 JVMWrapper("JVM_SetPrimitiveArrayElement");
3286 arrayOop a = check_array(env, arr, true, CHECK);
3287 assert(a->is_typeArray(), "just checking");
3288 BasicType value_type = (BasicType) vCode;
3289 Reflection::array_set(&v, a, index, value_type, CHECK);
3290 JVM_END
3291
3292
3293 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3294 JVMWrapper("JVM_NewArray");
3295 JvmtiVMObjectAllocEventCollector oam;
3296 oop element_mirror = JNIHandles::resolve(eltClass);
3297 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3298 return JNIHandles::make_local(env, result);
3299 JVM_END
3300
3301
3302 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3303 JVMWrapper("JVM_NewMultiArray");
3304 JvmtiVMObjectAllocEventCollector oam;
3305 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3306 oop element_mirror = JNIHandles::resolve(eltClass);
3307 assert(dim_array->is_typeArray(), "just checking");
3308 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3309 return JNIHandles::make_local(env, result);
3310 JVM_END
3311
3312
3313 // Library support ///////////////////////////////////////////////////////////////////////////
3314
3315 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3316 //%note jvm_ct
3317 JVMWrapper("JVM_LoadLibrary");
3318 char ebuf[1024];
3319 void *load_result;
3320 {
3321 ThreadToNativeFromVM ttnfvm(thread);
3322 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3323 }
3324 if (load_result == NULL) {
3325 char msg[1024];
3326 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3327 // Since 'ebuf' may contain a string encoded using
3328 // platform encoding scheme, we need to pass
3329 // Exceptions::unsafe_to_utf8 to the new_exception method
3330 // as the last argument. See bug 6367357.
3331 Handle h_exception =
3332 Exceptions::new_exception(thread,
3333 vmSymbols::java_lang_UnsatisfiedLinkError(),
3334 msg, Exceptions::unsafe_to_utf8);
3335
3336 THROW_HANDLE_0(h_exception);
3337 }
3338 return load_result;
3339 JVM_END
3340
3341
3342 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3343 JVMWrapper("JVM_UnloadLibrary");
3344 os::dll_unload(handle);
3345 JVM_END
3346
3347
3348 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3349 JVMWrapper("JVM_FindLibraryEntry");
3350 return os::dll_lookup(handle, name);
3351 JVM_END
3352
3353
3354 // JNI version ///////////////////////////////////////////////////////////////////////////////
3355
3356 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3357 JVMWrapper("JVM_IsSupportedJNIVersion");
3358 return Threads::is_supported_jni_version_including_1_1(version);
3359 JVM_END
3360
3361
3362 // String support ///////////////////////////////////////////////////////////////////////////
3363
3364 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3365 JVMWrapper("JVM_InternString");
3366 JvmtiVMObjectAllocEventCollector oam;
3367 if (str == NULL) return NULL;
3368 oop string = JNIHandles::resolve_non_null(str);
3369 oop result = StringTable::intern(string, CHECK_NULL);
3370 return (jstring) JNIHandles::make_local(env, result);
3371 JVM_END
3372
3373
3374 // Raw monitor support //////////////////////////////////////////////////////////////////////
3375
3376 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3377 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3378 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3379 // that only works with java threads.
3380
3381
3382 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3383 VM_Exit::block_if_vm_exited();
3384 JVMWrapper("JVM_RawMonitorCreate");
3385 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3386 }
3387
3388
3389 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3390 VM_Exit::block_if_vm_exited();
3391 JVMWrapper("JVM_RawMonitorDestroy");
3392 delete ((Mutex*) mon);
3393 }
3394
3395
3396 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3397 VM_Exit::block_if_vm_exited();
3398 JVMWrapper("JVM_RawMonitorEnter");
3399 ((Mutex*) mon)->jvm_raw_lock();
3400 return 0;
3401 }
3402
3403
3404 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3405 VM_Exit::block_if_vm_exited();
3406 JVMWrapper("JVM_RawMonitorExit");
3407 ((Mutex*) mon)->jvm_raw_unlock();
3408 }
3409
3410
3411 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3412
3413 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3414 Handle loader, Handle protection_domain,
3415 jboolean throwError, TRAPS) {
3416 // Security Note:
3417 // The Java level wrapper will perform the necessary security check allowing
3418 // us to pass the NULL as the initiating class loader. The VM is responsible for
3419 // the checkPackageAccess relative to the initiating class loader via the
3420 // protection_domain. The protection_domain is passed as NULL by the java code
3421 // if there is no security manager in 3-arg Class.forName().
3422 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3423
3424 // Check if we should initialize the class
3425 if (init && klass->is_instance_klass()) {
3426 klass->initialize(CHECK_NULL);
3427 }
3428 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3429 }
3430
3431
3432 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3433
3434 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3435 JVMWrapper("JVM_InvokeMethod");
3436 Handle method_handle;
3437 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3438 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3439 Handle receiver(THREAD, JNIHandles::resolve(obj));
3440 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3441 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3442 jobject res = JNIHandles::make_local(env, result);
3443 if (JvmtiExport::should_post_vm_object_alloc()) {
3444 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3445 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3446 if (java_lang_Class::is_primitive(ret_type)) {
3447 // Only for primitive type vm allocates memory for java object.
3448 // See box() method.
3449 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3450 }
3451 }
3452 return res;
3453 } else {
3454 THROW_0(vmSymbols::java_lang_StackOverflowError());
3455 }
3456 JVM_END
3457
3458
3459 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3460 JVMWrapper("JVM_NewInstanceFromConstructor");
3461 oop constructor_mirror = JNIHandles::resolve(c);
3462 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3463 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3464 jobject res = JNIHandles::make_local(env, result);
3465 if (JvmtiExport::should_post_vm_object_alloc()) {
3466 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3467 }
3468 return res;
3469 JVM_END
3470
3471 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3472
3473 JVM_LEAF(jboolean, JVM_SupportsCX8())
3474 JVMWrapper("JVM_SupportsCX8");
3475 return VM_Version::supports_cx8();
3476 JVM_END
3477
3478 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3479 JVMWrapper("JVM_InitializeFromArchive");
3480 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3481 assert(k->is_klass(), "just checking");
3482 HeapShared::initialize_from_archived_subgraph(k);
3483 JVM_END
3484
3485 // Returns an array of all live Thread objects (VM internal JavaThreads,
3486 // jvmti agent threads, and JNI attaching threads are skipped)
3487 // See CR 6404306 regarding JNI attaching threads
3488 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3489 ResourceMark rm(THREAD);
3490 ThreadsListEnumerator tle(THREAD, false, false);
3491 JvmtiVMObjectAllocEventCollector oam;
3492
3493 int num_threads = tle.num_threads();
3494 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3495 objArrayHandle threads_ah(THREAD, r);
3496
3497 for (int i = 0; i < num_threads; i++) {
3498 Handle h = tle.get_threadObj(i);
3499 threads_ah->obj_at_put(i, h());
3500 }
3501
3502 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3503 JVM_END
3504
3505
3506 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3507 // Return StackTraceElement[][], each element is the stack trace of a thread in
3508 // the corresponding entry in the given threads array
3509 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3510 JVMWrapper("JVM_DumpThreads");
3511 JvmtiVMObjectAllocEventCollector oam;
3512
3513 // Check if threads is null
3514 if (threads == NULL) {
3515 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3516 }
3517
3518 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3519 objArrayHandle ah(THREAD, a);
3520 int num_threads = ah->length();
3521 // check if threads is non-empty array
3522 if (num_threads == 0) {
3523 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3524 }
3525
3526 // check if threads is not an array of objects of Thread class
3527 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3528 if (k != SystemDictionary::Thread_klass()) {
3529 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3530 }
3531
3532 ResourceMark rm(THREAD);
3533
3534 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3535 for (int i = 0; i < num_threads; i++) {
3536 oop thread_obj = ah->obj_at(i);
3537 instanceHandle h(THREAD, (instanceOop) thread_obj);
3538 thread_handle_array->append(h);
3539 }
3540
3541 // The JavaThread references in thread_handle_array are validated
3542 // in VM_ThreadDump::doit().
3543 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3544 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3545
3546 JVM_END
3547
3548 // JVM monitoring and management support
3549 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3550 return Management::get_jmm_interface(version);
3551 JVM_END
3552
3553 // com.sun.tools.attach.VirtualMachine agent properties support
3554 //
3555 // Initialize the agent properties with the properties maintained in the VM
3556 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3557 JVMWrapper("JVM_InitAgentProperties");
3558 ResourceMark rm;
3559
3560 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3561
3562 PUTPROP(props, "sun.java.command", Arguments::java_command());
3563 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3564 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3565 return properties;
3566 JVM_END
3567
3568 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3569 {
3570 JVMWrapper("JVM_GetEnclosingMethodInfo");
3571 JvmtiVMObjectAllocEventCollector oam;
3572
3573 if (ofClass == NULL) {
3574 return NULL;
3575 }
3576 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3577 // Special handling for primitive objects
3578 if (java_lang_Class::is_primitive(mirror())) {
3579 return NULL;
3580 }
3581 Klass* k = java_lang_Class::as_Klass(mirror());
3582 if (!k->is_instance_klass()) {
3583 return NULL;
3584 }
3585 InstanceKlass* ik = InstanceKlass::cast(k);
3586 int encl_method_class_idx = ik->enclosing_method_class_index();
3587 if (encl_method_class_idx == 0) {
3588 return NULL;
3589 }
3590 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3591 objArrayHandle dest(THREAD, dest_o);
3592 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3593 dest->obj_at_put(0, enc_k->java_mirror());
3594 int encl_method_method_idx = ik->enclosing_method_method_index();
3595 if (encl_method_method_idx != 0) {
3596 Symbol* sym = ik->constants()->symbol_at(
3597 extract_low_short_from_int(
3598 ik->constants()->name_and_type_at(encl_method_method_idx)));
3599 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3600 dest->obj_at_put(1, str());
3601 sym = ik->constants()->symbol_at(
3602 extract_high_short_from_int(
3603 ik->constants()->name_and_type_at(encl_method_method_idx)));
3604 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3605 dest->obj_at_put(2, str());
3606 }
3607 return (jobjectArray) JNIHandles::make_local(dest());
3608 }
3609 JVM_END
3610
3611 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3612 {
3613 memset(info, 0, info_size);
3614
3615 info->jvm_version = VM_Version::jvm_version();
3616 info->patch_version = VM_Version::vm_patch_version();
3617
3618 // when we add a new capability in the jvm_version_info struct, we should also
3619 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3620 // counter defined in runtimeService.cpp.
3621 info->is_attach_supported = AttachListener::is_attach_supported();
3622 }
3623 JVM_END
3624
3625 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3626 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3627 ResourceMark rm(THREAD);
3628
3629 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3630 return NULL;
3631 }
3632
3633 char** vm_flags = Arguments::jvm_flags_array();
3634 char** vm_args = Arguments::jvm_args_array();
3635 int num_flags = Arguments::num_jvm_flags();
3636 int num_args = Arguments::num_jvm_args();
3637
3638 InstanceKlass* ik = SystemDictionary::String_klass();
3639 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3640 objArrayHandle result_h(THREAD, r);
3641
3642 int index = 0;
3643 for (int j = 0; j < num_flags; j++, index++) {
3644 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3645 result_h->obj_at_put(index, h());
3646 }
3647 for (int i = 0; i < num_args; i++, index++) {
3648 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3649 result_h->obj_at_put(index, h());
3650 }
3651 return (jobjectArray) JNIHandles::make_local(env, result_h());
3652 JVM_END
3653
3654 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3655 return os::get_signal_number(name);
3656 JVM_END