1 /*
2 * Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/javaAssertions.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/stringTable.hpp"
36 #include "classfile/symbolTable.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "gc/shared/collectedHeap.inline.hpp"
40 #include "interpreter/bytecode.hpp"
41 #include "interpreter/bytecodeUtils.hpp"
42 #include "jfr/jfrEvents.hpp"
43 #include "logging/log.hpp"
44 #include "memory/heapShared.hpp"
45 #include "memory/oopFactory.hpp"
46 #include "memory/referenceType.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.hpp"
49 #include "oops/access.inline.hpp"
50 #include "oops/constantPool.hpp"
51 #include "oops/fieldStreams.inline.hpp"
52 #include "oops/instanceKlass.hpp"
53 #include "oops/method.hpp"
54 #include "oops/recordComponent.hpp"
55 #include "oops/objArrayKlass.hpp"
56 #include "oops/objArrayOop.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "prims/jvm_misc.hpp"
59 #include "prims/jvmtiExport.hpp"
60 #include "prims/jvmtiThreadState.hpp"
61 #include "prims/nativeLookup.hpp"
62 #include "prims/stackwalk.hpp"
63 #include "runtime/arguments.hpp"
64 #include "runtime/atomic.hpp"
65 #include "runtime/handles.inline.hpp"
66 #include "runtime/init.hpp"
67 #include "runtime/interfaceSupport.inline.hpp"
68 #include "runtime/deoptimization.hpp"
69 #include "runtime/handshake.hpp"
70 #include "runtime/java.hpp"
71 #include "runtime/javaCalls.hpp"
72 #include "runtime/jfieldIDWorkaround.hpp"
73 #include "runtime/jniHandles.inline.hpp"
74 #include "runtime/os.inline.hpp"
75 #include "runtime/perfData.hpp"
76 #include "runtime/reflection.hpp"
77 #include "runtime/thread.inline.hpp"
78 #include "runtime/threadSMR.hpp"
79 #include "runtime/vframe.inline.hpp"
80 #include "runtime/vmOperations.hpp"
81 #include "runtime/vm_version.hpp"
82 #include "services/attachListener.hpp"
83 #include "services/management.hpp"
84 #include "services/threadService.hpp"
85 #include "utilities/copy.hpp"
86 #include "utilities/defaultStream.hpp"
87 #include "utilities/dtrace.hpp"
88 #include "utilities/events.hpp"
89 #include "utilities/histogram.hpp"
90 #include "utilities/macros.hpp"
91 #include "utilities/utf8.hpp"
92 #if INCLUDE_CDS
93 #include "classfile/systemDictionaryShared.hpp"
94 #endif
95
96 #include <errno.h>
97 #include <jfr/recorder/jfrRecorder.hpp>
98
99 /*
100 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
101 such ctors and calls MUST NOT come between an oop declaration/init and its
102 usage because if objects are move this may cause various memory stomps, bus
103 errors and segfaults. Here is a cookbook for causing so called "naked oop
104 failures":
105
106 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
107 JVMWrapper("JVM_GetClassDeclaredFields");
108
109 // Object address to be held directly in mirror & not visible to GC
110 oop mirror = JNIHandles::resolve_non_null(ofClass);
111
112 // If this ctor can hit a safepoint, moving objects around, then
113 ComplexConstructor foo;
114
115 // Boom! mirror may point to JUNK instead of the intended object
116 (some dereference of mirror)
117
118 // Here's another call that may block for GC, making mirror stale
119 MutexLocker ml(some_lock);
120
121 // And here's an initializer that can result in a stale oop
122 // all in one step.
123 oop o = call_that_can_throw_exception(TRAPS);
124
125
126 The solution is to keep the oop declaration BELOW the ctor or function
127 call that might cause a GC, do another resolve to reassign the oop, or
128 consider use of a Handle instead of an oop so there is immunity from object
129 motion. But note that the "QUICK" entries below do not have a handlemark
130 and thus can only support use of handles passed in.
131 */
132
133 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
134 ResourceMark rm;
135 int line_number = -1;
136 const char * source_file = NULL;
137 const char * trace = "explicit";
138 InstanceKlass* caller = NULL;
139 JavaThread* jthread = JavaThread::current();
140 if (jthread->has_last_Java_frame()) {
141 vframeStream vfst(jthread);
142
143 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
144 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController");
145 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
146 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction");
147 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
148
149 Method* last_caller = NULL;
150
151 while (!vfst.at_end()) {
152 Method* m = vfst.method();
153 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
154 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
155 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
156 break;
157 }
158 last_caller = m;
159 vfst.next();
160 }
161 // if this is called from Class.forName0 and that is called from Class.forName,
162 // then print the caller of Class.forName. If this is Class.loadClass, then print
163 // that caller, otherwise keep quiet since this should be picked up elsewhere.
164 bool found_it = false;
165 if (!vfst.at_end() &&
166 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
167 vfst.method()->name() == vmSymbols::forName0_name()) {
168 vfst.next();
169 if (!vfst.at_end() &&
170 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
171 vfst.method()->name() == vmSymbols::forName_name()) {
172 vfst.next();
173 found_it = true;
174 }
175 } else if (last_caller != NULL &&
176 last_caller->method_holder()->name() ==
177 vmSymbols::java_lang_ClassLoader() &&
178 last_caller->name() == vmSymbols::loadClass_name()) {
179 found_it = true;
180 } else if (!vfst.at_end()) {
181 if (vfst.method()->is_native()) {
182 // JNI call
183 found_it = true;
184 }
185 }
186 if (found_it && !vfst.at_end()) {
187 // found the caller
188 caller = vfst.method()->method_holder();
189 line_number = vfst.method()->line_number_from_bci(vfst.bci());
190 if (line_number == -1) {
191 // show method name if it's a native method
192 trace = vfst.method()->name_and_sig_as_C_string();
193 }
194 Symbol* s = caller->source_file_name();
195 if (s != NULL) {
196 source_file = s->as_C_string();
197 }
198 }
199 }
200 if (caller != NULL) {
201 if (to_class != caller) {
202 const char * from = caller->external_name();
203 const char * to = to_class->external_name();
204 // print in a single call to reduce interleaving between threads
205 if (source_file != NULL) {
206 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
207 } else {
208 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
209 }
210 }
211 }
212 }
213
214 void trace_class_resolution(Klass* to_class) {
215 EXCEPTION_MARK;
216 trace_class_resolution_impl(to_class, THREAD);
217 if (HAS_PENDING_EXCEPTION) {
218 CLEAR_PENDING_EXCEPTION;
219 }
220 }
221
222 // Wrapper to trace JVM functions
223
224 #ifdef ASSERT
225 Histogram* JVMHistogram;
226 volatile int JVMHistogram_lock = 0;
227
228 class JVMHistogramElement : public HistogramElement {
229 public:
230 JVMHistogramElement(const char* name);
231 };
232
233 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
234 _name = elementName;
235 uintx count = 0;
236
237 while (Atomic::cmpxchg(&JVMHistogram_lock, 0, 1) != 0) {
238 while (Atomic::load_acquire(&JVMHistogram_lock) != 0) {
239 count +=1;
240 if ( (WarnOnStalledSpinLock > 0)
241 && (count % WarnOnStalledSpinLock == 0)) {
242 warning("JVMHistogram_lock seems to be stalled");
243 }
244 }
245 }
246
247 if(JVMHistogram == NULL)
248 JVMHistogram = new Histogram("JVM Call Counts",100);
249
250 JVMHistogram->add_element(this);
251 Atomic::dec(&JVMHistogram_lock);
252 }
253
254 #define JVMCountWrapper(arg) \
255 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
256 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
257
258 #define JVMWrapper(arg) JVMCountWrapper(arg);
259 #else
260 #define JVMWrapper(arg)
261 #endif
262
263
264 // Interface version /////////////////////////////////////////////////////////////////////
265
266
267 JVM_LEAF(jint, JVM_GetInterfaceVersion())
268 return JVM_INTERFACE_VERSION;
269 JVM_END
270
271
272 // java.lang.System //////////////////////////////////////////////////////////////////////
273
274
275 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
276 JVMWrapper("JVM_CurrentTimeMillis");
277 return os::javaTimeMillis();
278 JVM_END
279
280 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
281 JVMWrapper("JVM_NanoTime");
282 return os::javaTimeNanos();
283 JVM_END
284
285 // The function below is actually exposed by jdk.internal.misc.VM and not
286 // java.lang.System, but we choose to keep it here so that it stays next
287 // to JVM_CurrentTimeMillis and JVM_NanoTime
288
289 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
290 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
291
292 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
293 JVMWrapper("JVM_GetNanoTimeAdjustment");
294 jlong seconds;
295 jlong nanos;
296
297 os::javaTimeSystemUTC(seconds, nanos);
298
299 // We're going to verify that the result can fit in a long.
300 // For that we need the difference in seconds between 'seconds'
301 // and 'offset_secs' to be such that:
302 // |seconds - offset_secs| < (2^63/10^9)
303 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
304 // which makes |seconds - offset_secs| < 2^33
305 // and we will prefer +/- 2^32 as the maximum acceptable diff
306 // as 2^32 has a more natural feel than 2^33...
307 //
308 // So if |seconds - offset_secs| >= 2^32 - we return a special
309 // sentinel value (-1) which the caller should take as an
310 // exception value indicating that the offset given to us is
311 // too far from range of the current time - leading to too big
312 // a nano adjustment. The caller is expected to recover by
313 // computing a more accurate offset and calling this method
314 // again. (For the record 2^32 secs is ~136 years, so that
315 // should rarely happen)
316 //
317 jlong diff = seconds - offset_secs;
318 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
319 return -1; // sentinel value: the offset is too far off the target
320 }
321
322 // return the adjustment. If you compute a time by adding
323 // this number of nanoseconds along with the number of seconds
324 // in the offset you should get the current UTC time.
325 return (diff * (jlong)1000000000) + nanos;
326 JVM_END
327
328 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
329 jobject dst, jint dst_pos, jint length))
330 JVMWrapper("JVM_ArrayCopy");
331 // Check if we have null pointers
332 if (src == NULL || dst == NULL) {
333 THROW(vmSymbols::java_lang_NullPointerException());
334 }
335 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
336 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
337 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
338 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
339 // Do copy
340 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
341 JVM_END
342
343
344 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
345 JavaValue r(T_OBJECT);
346 // public synchronized Object put(Object key, Object value);
347 HandleMark hm(THREAD);
348 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
349 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
350 JavaCalls::call_virtual(&r,
351 props,
352 SystemDictionary::Properties_klass(),
353 vmSymbols::put_name(),
354 vmSymbols::object_object_object_signature(),
355 key_str,
356 value_str,
357 THREAD);
358 }
359
360
361 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
362
363 /*
364 * Return all of the system properties in a Java String array with alternating
365 * names and values from the jvm SystemProperty.
366 * Which includes some internal and all commandline -D defined properties.
367 */
368 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
369 JVMWrapper("JVM_GetProperties");
370 ResourceMark rm(THREAD);
371 HandleMark hm(THREAD);
372 int ndx = 0;
373 int fixedCount = 2;
374
375 SystemProperty* p = Arguments::system_properties();
376 int count = Arguments::PropertyList_count(p);
377
378 // Allocate result String array
379 InstanceKlass* ik = SystemDictionary::String_klass();
380 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
381 objArrayHandle result_h(THREAD, r);
382
383 while (p != NULL) {
384 const char * key = p->key();
385 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
386 const char * value = p->value();
387 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
388 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
389 result_h->obj_at_put(ndx * 2, key_str());
390 result_h->obj_at_put(ndx * 2 + 1, value_str());
391 ndx++;
392 }
393 p = p->next();
394 }
395
396 // Convert the -XX:MaxDirectMemorySize= command line flag
397 // to the sun.nio.MaxDirectMemorySize property.
398 // Do this after setting user properties to prevent people
399 // from setting the value with a -D option, as requested.
400 // Leave empty if not supplied
401 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
402 char as_chars[256];
403 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
404 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
405 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
406 result_h->obj_at_put(ndx * 2, key_str());
407 result_h->obj_at_put(ndx * 2 + 1, value_str());
408 ndx++;
409 }
410
411 // JVM monitoring and management support
412 // Add the sun.management.compiler property for the compiler's name
413 {
414 #undef CSIZE
415 #if defined(_LP64) || defined(_WIN64)
416 #define CSIZE "64-Bit "
417 #else
418 #define CSIZE
419 #endif // 64bit
420
421 #ifdef TIERED
422 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
423 #else
424 #if defined(COMPILER1)
425 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
426 #elif defined(COMPILER2)
427 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
428 #elif INCLUDE_JVMCI
429 #error "INCLUDE_JVMCI should imply TIERED"
430 #else
431 const char* compiler_name = "";
432 #endif // compilers
433 #endif // TIERED
434
435 if (*compiler_name != '\0' &&
436 (Arguments::mode() != Arguments::_int)) {
437 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
438 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
439 result_h->obj_at_put(ndx * 2, key_str());
440 result_h->obj_at_put(ndx * 2 + 1, value_str());
441 ndx++;
442 }
443 }
444
445 return (jobjectArray) JNIHandles::make_local(env, result_h());
446 JVM_END
447
448
449 /*
450 * Return the temporary directory that the VM uses for the attach
451 * and perf data files.
452 *
453 * It is important that this directory is well-known and the
454 * same for all VM instances. It cannot be affected by configuration
455 * variables such as java.io.tmpdir.
456 */
457 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
458 JVMWrapper("JVM_GetTemporaryDirectory");
459 HandleMark hm(THREAD);
460 const char* temp_dir = os::get_temp_directory();
461 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
462 return (jstring) JNIHandles::make_local(env, h());
463 JVM_END
464
465
466 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
467
468 extern volatile jint vm_created;
469
470 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
471 JVMWrapper("JVM_BeforeHalt");
472 // Link all classes for dynamic CDS dumping before vm exit.
473 if (DynamicDumpSharedSpaces) {
474 MetaspaceShared::link_and_cleanup_shared_classes(THREAD);
475 }
476 EventShutdown event;
477 if (event.should_commit()) {
478 event.set_reason("Shutdown requested from Java");
479 event.commit();
480 }
481 JVM_END
482
483
484 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
485 before_exit(thread);
486 vm_exit(code);
487 JVM_END
488
489
490 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
491 JVMWrapper("JVM_GC");
492 if (!DisableExplicitGC) {
493 Universe::heap()->collect(GCCause::_java_lang_system_gc);
494 }
495 JVM_END
496
497
498 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
499 JVMWrapper("JVM_MaxObjectInspectionAge");
500 return Universe::heap()->millis_since_last_gc();
501 JVM_END
502
503
504 static inline jlong convert_size_t_to_jlong(size_t val) {
505 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
506 NOT_LP64 (return (jlong)val;)
507 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
508 }
509
510 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
511 JVMWrapper("JVM_TotalMemory");
512 size_t n = Universe::heap()->capacity();
513 return convert_size_t_to_jlong(n);
514 JVM_END
515
516
517 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
518 JVMWrapper("JVM_FreeMemory");
519 size_t n = Universe::heap()->unused();
520 return convert_size_t_to_jlong(n);
521 JVM_END
522
523
524 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
525 JVMWrapper("JVM_MaxMemory");
526 size_t n = Universe::heap()->max_capacity();
527 return convert_size_t_to_jlong(n);
528 JVM_END
529
530
531 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
532 JVMWrapper("JVM_ActiveProcessorCount");
533 return os::active_processor_count();
534 JVM_END
535
536
537
538 // java.lang.Throwable //////////////////////////////////////////////////////
539
540 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
541 JVMWrapper("JVM_FillInStackTrace");
542 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
543 java_lang_Throwable::fill_in_stack_trace(exception);
544 JVM_END
545
546 // java.lang.NullPointerException ///////////////////////////////////////////
547
548 JVM_ENTRY(jstring, JVM_GetExtendedNPEMessage(JNIEnv *env, jthrowable throwable))
549 if (!ShowCodeDetailsInExceptionMessages) return NULL;
550
551 oop exc = JNIHandles::resolve_non_null(throwable);
552
553 Method* method;
554 int bci;
555 if (!java_lang_Throwable::get_top_method_and_bci(exc, &method, &bci)) {
556 return NULL;
557 }
558 if (method->is_native()) {
559 return NULL;
560 }
561
562 stringStream ss;
563 bool ok = BytecodeUtils::get_NPE_message_at(&ss, method, bci);
564 if (ok) {
565 oop result = java_lang_String::create_oop_from_str(ss.base(), CHECK_NULL);
566 return (jstring) JNIHandles::make_local(env, result);
567 } else {
568 return NULL;
569 }
570 JVM_END
571
572 // java.lang.StackTraceElement //////////////////////////////////////////////
573
574
575 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
576 JVMWrapper("JVM_InitStackTraceElementArray");
577 Handle exception(THREAD, JNIHandles::resolve(throwable));
578 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
579 objArrayHandle stack_trace(THREAD, st);
580 // Fill in the allocated stack trace
581 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
582 JVM_END
583
584
585 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
586 JVMWrapper("JVM_InitStackTraceElement");
587 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
588 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
589 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
590 JVM_END
591
592
593 // java.lang.StackWalker //////////////////////////////////////////////////////
594
595
596 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
597 jint skip_frames, jint frame_count, jint start_index,
598 jobjectArray frames))
599 JVMWrapper("JVM_CallStackWalk");
600 JavaThread* jt = (JavaThread*) THREAD;
601 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
602 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
603 }
604
605 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
606
607 // frames array is a Class<?>[] array when only getting caller reference,
608 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
609 // be null.
610 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
611 objArrayHandle frames_array_h(THREAD, fa);
612
613 int limit = start_index + frame_count;
614 if (frames_array_h->length() < limit) {
615 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
616 }
617
618 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
619 start_index, frames_array_h, CHECK_NULL);
620 return JNIHandles::make_local(env, result);
621 JVM_END
622
623
624 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
625 jint frame_count, jint start_index,
626 jobjectArray frames))
627 JVMWrapper("JVM_MoreStackWalk");
628 JavaThread* jt = (JavaThread*) THREAD;
629
630 // frames array is a Class<?>[] array when only getting caller reference,
631 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
632 // be null.
633 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
634 objArrayHandle frames_array_h(THREAD, fa);
635
636 int limit = start_index+frame_count;
637 if (frames_array_h->length() < limit) {
638 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
639 }
640
641 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
642 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
643 start_index, frames_array_h, THREAD);
644 JVM_END
645
646 // java.lang.Object ///////////////////////////////////////////////
647
648
649 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
650 JVMWrapper("JVM_IHashCode");
651 // as implemented in the classic virtual machine; return 0 if object is NULL
652 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
653 JVM_END
654
655
656 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
657 JVMWrapper("JVM_MonitorWait");
658 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
659 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
660 if (JvmtiExport::should_post_monitor_wait()) {
661 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
662
663 // The current thread already owns the monitor and it has not yet
664 // been added to the wait queue so the current thread cannot be
665 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
666 // event handler cannot accidentally consume an unpark() meant for
667 // the ParkEvent associated with this ObjectMonitor.
668 }
669 ObjectSynchronizer::wait(obj, ms, CHECK);
670 JVM_END
671
672
673 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
674 JVMWrapper("JVM_MonitorNotify");
675 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
676 ObjectSynchronizer::notify(obj, CHECK);
677 JVM_END
678
679
680 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
681 JVMWrapper("JVM_MonitorNotifyAll");
682 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
683 ObjectSynchronizer::notifyall(obj, CHECK);
684 JVM_END
685
686
687 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
688 JVMWrapper("JVM_Clone");
689 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
690 Klass* klass = obj->klass();
691 JvmtiVMObjectAllocEventCollector oam;
692
693 #ifdef ASSERT
694 // Just checking that the cloneable flag is set correct
695 if (obj->is_array()) {
696 guarantee(klass->is_cloneable(), "all arrays are cloneable");
697 } else {
698 guarantee(obj->is_instance(), "should be instanceOop");
699 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
700 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
701 }
702 #endif
703
704 // Check if class of obj supports the Cloneable interface.
705 // All arrays are considered to be cloneable (See JLS 20.1.5).
706 // All j.l.r.Reference classes are considered non-cloneable.
707 if (!klass->is_cloneable() ||
708 (klass->is_instance_klass() &&
709 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
710 ResourceMark rm(THREAD);
711 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
712 }
713
714 // Make shallow object copy
715 const int size = obj->size();
716 oop new_obj_oop = NULL;
717 if (obj->is_array()) {
718 const int length = ((arrayOop)obj())->length();
719 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
720 /* do_zero */ true, CHECK_NULL);
721 } else {
722 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
723 }
724
725 HeapAccess<>::clone(obj(), new_obj_oop, size);
726
727 Handle new_obj(THREAD, new_obj_oop);
728 // Caution: this involves a java upcall, so the clone should be
729 // "gc-robust" by this stage.
730 if (klass->has_finalizer()) {
731 assert(obj->is_instance(), "should be instanceOop");
732 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
733 new_obj = Handle(THREAD, new_obj_oop);
734 }
735
736 return JNIHandles::make_local(env, new_obj());
737 JVM_END
738
739 // java.io.File ///////////////////////////////////////////////////////////////
740
741 JVM_LEAF(char*, JVM_NativePath(char* path))
742 JVMWrapper("JVM_NativePath");
743 return os::native_path(path);
744 JVM_END
745
746
747 // Misc. class handling ///////////////////////////////////////////////////////////
748
749
750 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
751 JVMWrapper("JVM_GetCallerClass");
752
753 // Getting the class of the caller frame.
754 //
755 // The call stack at this point looks something like this:
756 //
757 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
758 // [1] [ @CallerSensitive API.method ]
759 // [.] [ (skipped intermediate frames) ]
760 // [n] [ caller ]
761 vframeStream vfst(thread);
762 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
763 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
764 Method* m = vfst.method();
765 assert(m != NULL, "sanity");
766 switch (n) {
767 case 0:
768 // This must only be called from Reflection.getCallerClass
769 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
770 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
771 }
772 // fall-through
773 case 1:
774 // Frame 0 and 1 must be caller sensitive.
775 if (!m->caller_sensitive()) {
776 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
777 }
778 break;
779 default:
780 if (!m->is_ignored_by_security_stack_walk()) {
781 // We have reached the desired frame; return the holder class.
782 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
783 }
784 break;
785 }
786 }
787 return NULL;
788 JVM_END
789
790
791 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
792 JVMWrapper("JVM_FindPrimitiveClass");
793 oop mirror = NULL;
794 BasicType t = name2type(utf);
795 if (t != T_ILLEGAL && !is_reference_type(t)) {
796 mirror = Universe::java_mirror(t);
797 }
798 if (mirror == NULL) {
799 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
800 } else {
801 return (jclass) JNIHandles::make_local(env, mirror);
802 }
803 JVM_END
804
805
806 // Returns a class loaded by the bootstrap class loader; or null
807 // if not found. ClassNotFoundException is not thrown.
808 // FindClassFromBootLoader is exported to the launcher for windows.
809 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
810 const char* name))
811 JVMWrapper("JVM_FindClassFromBootLoader");
812
813 // Java libraries should ensure that name is never null...
814 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
815 // It's impossible to create this class; the name cannot fit
816 // into the constant pool.
817 return NULL;
818 }
819
820 TempNewSymbol h_name = SymbolTable::new_symbol(name);
821 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
822 if (k == NULL) {
823 return NULL;
824 }
825
826 if (log_is_enabled(Debug, class, resolve)) {
827 trace_class_resolution(k);
828 }
829 return (jclass) JNIHandles::make_local(env, k->java_mirror());
830 JVM_END
831
832 // Find a class with this name in this loader, using the caller's protection domain.
833 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
834 jboolean init, jobject loader,
835 jclass caller))
836 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
837 // Java libraries should ensure that name is never null...
838 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
839 // It's impossible to create this class; the name cannot fit
840 // into the constant pool.
841 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
842 }
843
844 TempNewSymbol h_name = SymbolTable::new_symbol(name);
845
846 oop loader_oop = JNIHandles::resolve(loader);
847 oop from_class = JNIHandles::resolve(caller);
848 oop protection_domain = NULL;
849 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
850 // NPE. Put it in another way, the bootstrap class loader has all permission and
851 // thus no checkPackageAccess equivalence in the VM class loader.
852 // The caller is also passed as NULL by the java code if there is no security
853 // manager to avoid the performance cost of getting the calling class.
854 if (from_class != NULL && loader_oop != NULL) {
855 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
856 }
857
858 Handle h_loader(THREAD, loader_oop);
859 Handle h_prot(THREAD, protection_domain);
860 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
861 h_prot, false, THREAD);
862
863 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
864 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
865 }
866 return result;
867 JVM_END
868
869 // Currently only called from the old verifier.
870 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
871 jboolean init, jclass from))
872 JVMWrapper("JVM_FindClassFromClass");
873 if (name == NULL) {
874 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
875 }
876 if ((int)strlen(name) > Symbol::max_length()) {
877 // It's impossible to create this class; the name cannot fit
878 // into the constant pool.
879 Exceptions::fthrow(THREAD_AND_LOCATION,
880 vmSymbols::java_lang_NoClassDefFoundError(),
881 "Class name exceeds maximum length of %d: %s",
882 Symbol::max_length(),
883 name);
884 return 0;
885 }
886 TempNewSymbol h_name = SymbolTable::new_symbol(name);
887 oop from_class_oop = JNIHandles::resolve(from);
888 Klass* from_class = (from_class_oop == NULL)
889 ? (Klass*)NULL
890 : java_lang_Class::as_Klass(from_class_oop);
891 oop class_loader = NULL;
892 oop protection_domain = NULL;
893 if (from_class != NULL) {
894 class_loader = from_class->class_loader();
895 protection_domain = from_class->protection_domain();
896 }
897 Handle h_loader(THREAD, class_loader);
898 Handle h_prot (THREAD, protection_domain);
899 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
900 h_prot, true, thread);
901
902 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
903 // this function is generally only used for class loading during verification.
904 ResourceMark rm;
905 oop from_mirror = JNIHandles::resolve_non_null(from);
906 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
907 const char * from_name = from_class->external_name();
908
909 oop mirror = JNIHandles::resolve_non_null(result);
910 Klass* to_class = java_lang_Class::as_Klass(mirror);
911 const char * to = to_class->external_name();
912 log_debug(class, resolve)("%s %s (verification)", from_name, to);
913 }
914
915 return result;
916 JVM_END
917
918 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
919 if (loader.is_null()) {
920 return;
921 }
922
923 // check whether the current caller thread holds the lock or not.
924 // If not, increment the corresponding counter
925 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
926 ObjectSynchronizer::owner_self) {
927 counter->inc();
928 }
929 }
930
931 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
932 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
933 jobject loader, const jbyte *buf,
934 jsize len, jobject pd, const char *source,
935 TRAPS) {
936 if (source == NULL) source = "__JVM_DefineClass__";
937
938 assert(THREAD->is_Java_thread(), "must be a JavaThread");
939 JavaThread* jt = (JavaThread*) THREAD;
940
941 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
942 ClassLoader::perf_define_appclass_selftime(),
943 ClassLoader::perf_define_appclasses(),
944 jt->get_thread_stat()->perf_recursion_counts_addr(),
945 jt->get_thread_stat()->perf_timers_addr(),
946 PerfClassTraceTime::DEFINE_CLASS);
947
948 if (UsePerfData) {
949 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
950 }
951
952 // Since exceptions can be thrown, class initialization can take place
953 // if name is NULL no check for class name in .class stream has to be made.
954 TempNewSymbol class_name = NULL;
955 if (name != NULL) {
956 const int str_len = (int)strlen(name);
957 if (str_len > Symbol::max_length()) {
958 // It's impossible to create this class; the name cannot fit
959 // into the constant pool.
960 Exceptions::fthrow(THREAD_AND_LOCATION,
961 vmSymbols::java_lang_NoClassDefFoundError(),
962 "Class name exceeds maximum length of %d: %s",
963 Symbol::max_length(),
964 name);
965 return 0;
966 }
967 class_name = SymbolTable::new_symbol(name, str_len);
968 }
969
970 ResourceMark rm(THREAD);
971 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
972 Handle class_loader (THREAD, JNIHandles::resolve(loader));
973 if (UsePerfData) {
974 is_lock_held_by_thread(class_loader,
975 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
976 THREAD);
977 }
978 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
979 Klass* k = SystemDictionary::resolve_from_stream(class_name,
980 class_loader,
981 protection_domain,
982 &st,
983 CHECK_NULL);
984
985 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
986 trace_class_resolution(k);
987 }
988
989 return (jclass) JNIHandles::make_local(env, k->java_mirror());
990 }
991
992
993 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
994 JVMWrapper("JVM_DefineClass");
995
996 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
997 JVM_END
998
999
1000 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1001 JVMWrapper("JVM_DefineClassWithSource");
1002
1003 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
1004 JVM_END
1005
1006 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1007 JVMWrapper("JVM_FindLoadedClass");
1008 ResourceMark rm(THREAD);
1009
1010 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1011 char* str = java_lang_String::as_utf8_string(h_name());
1012
1013 // Sanity check, don't expect null
1014 if (str == NULL) return NULL;
1015
1016 // Internalize the string, converting '.' to '/' in string.
1017 char* p = (char*)str;
1018 while (*p != '\0') {
1019 if (*p == '.') {
1020 *p = '/';
1021 }
1022 p++;
1023 }
1024
1025 const int str_len = (int)(p - str);
1026 if (str_len > Symbol::max_length()) {
1027 // It's impossible to create this class; the name cannot fit
1028 // into the constant pool.
1029 return NULL;
1030 }
1031 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len);
1032
1033 // Security Note:
1034 // The Java level wrapper will perform the necessary security check allowing
1035 // us to pass the NULL as the initiating class loader.
1036 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1037 if (UsePerfData) {
1038 is_lock_held_by_thread(h_loader,
1039 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1040 THREAD);
1041 }
1042
1043 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1044 h_loader,
1045 Handle(),
1046 CHECK_NULL);
1047 #if INCLUDE_CDS
1048 if (k == NULL) {
1049 // If the class is not already loaded, try to see if it's in the shared
1050 // archive for the current classloader (h_loader).
1051 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1052 }
1053 #endif
1054 return (k == NULL) ? NULL :
1055 (jclass) JNIHandles::make_local(env, k->java_mirror());
1056 JVM_END
1057
1058 // Module support //////////////////////////////////////////////////////////////////////////////
1059
1060 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1061 jstring location, jobjectArray packages))
1062 JVMWrapper("JVM_DefineModule");
1063 Modules::define_module(module, is_open, version, location, packages, CHECK);
1064 JVM_END
1065
1066 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1067 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1068 Modules::set_bootloader_unnamed_module(module, CHECK);
1069 JVM_END
1070
1071 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, jstring package, jobject to_module))
1072 JVMWrapper("JVM_AddModuleExports");
1073 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1074 JVM_END
1075
1076 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, jstring package))
1077 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1078 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1079 JVM_END
1080
1081 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, jstring package))
1082 JVMWrapper("JVM_AddModuleExportsToAll");
1083 Modules::add_module_exports(from_module, package, NULL, CHECK);
1084 JVM_END
1085
1086 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1087 JVMWrapper("JVM_AddReadsModule");
1088 Modules::add_reads_module(from_module, source_module, CHECK);
1089 JVM_END
1090
1091 // Reflection support //////////////////////////////////////////////////////////////////////////////
1092
1093 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1094 assert (cls != NULL, "illegal class");
1095 JVMWrapper("JVM_InitClassName");
1096 JvmtiVMObjectAllocEventCollector oam;
1097 ResourceMark rm(THREAD);
1098 HandleMark hm(THREAD);
1099 Handle java_class(THREAD, JNIHandles::resolve(cls));
1100 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1101 return (jstring) JNIHandles::make_local(env, result);
1102 JVM_END
1103
1104
1105 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1106 JVMWrapper("JVM_GetClassInterfaces");
1107 JvmtiVMObjectAllocEventCollector oam;
1108 oop mirror = JNIHandles::resolve_non_null(cls);
1109
1110 // Special handling for primitive objects
1111 if (java_lang_Class::is_primitive(mirror)) {
1112 // Primitive objects does not have any interfaces
1113 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1114 return (jobjectArray) JNIHandles::make_local(env, r);
1115 }
1116
1117 Klass* klass = java_lang_Class::as_Klass(mirror);
1118 // Figure size of result array
1119 int size;
1120 if (klass->is_instance_klass()) {
1121 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1122 } else {
1123 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1124 size = 2;
1125 }
1126
1127 // Allocate result array
1128 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1129 objArrayHandle result (THREAD, r);
1130 // Fill in result
1131 if (klass->is_instance_klass()) {
1132 // Regular instance klass, fill in all local interfaces
1133 for (int index = 0; index < size; index++) {
1134 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1135 result->obj_at_put(index, k->java_mirror());
1136 }
1137 } else {
1138 // All arrays implement java.lang.Cloneable and java.io.Serializable
1139 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1140 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1141 }
1142 return (jobjectArray) JNIHandles::make_local(env, result());
1143 JVM_END
1144
1145
1146 JVM_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1147 JVMWrapper("JVM_IsInterface");
1148 oop mirror = JNIHandles::resolve_non_null(cls);
1149 if (java_lang_Class::is_primitive(mirror)) {
1150 return JNI_FALSE;
1151 }
1152 Klass* k = java_lang_Class::as_Klass(mirror);
1153 jboolean result = k->is_interface();
1154 assert(!result || k->is_instance_klass(),
1155 "all interfaces are instance types");
1156 // The compiler intrinsic for isInterface tests the
1157 // Klass::_access_flags bits in the same way.
1158 return result;
1159 JVM_END
1160
1161
1162 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1163 JVMWrapper("JVM_GetClassSigners");
1164 JvmtiVMObjectAllocEventCollector oam;
1165 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1166 // There are no signers for primitive types
1167 return NULL;
1168 }
1169
1170 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1171
1172 // If there are no signers set in the class, or if the class
1173 // is an array, return NULL.
1174 if (signers == NULL) return NULL;
1175
1176 // copy of the signers array
1177 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1178 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1179 for (int index = 0; index < signers->length(); index++) {
1180 signers_copy->obj_at_put(index, signers->obj_at(index));
1181 }
1182
1183 // return the copy
1184 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1185 JVM_END
1186
1187
1188 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1189 JVMWrapper("JVM_SetClassSigners");
1190 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1191 // This call is ignored for primitive types and arrays.
1192 // Signers are only set once, ClassLoader.java, and thus shouldn't
1193 // be called with an array. Only the bootstrap loader creates arrays.
1194 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1195 if (k->is_instance_klass()) {
1196 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1197 }
1198 }
1199 JVM_END
1200
1201
1202 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1203 JVMWrapper("JVM_GetProtectionDomain");
1204 if (JNIHandles::resolve(cls) == NULL) {
1205 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1206 }
1207
1208 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1209 // Primitive types does not have a protection domain.
1210 return NULL;
1211 }
1212
1213 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1214 return (jobject) JNIHandles::make_local(env, pd);
1215 JVM_END
1216
1217
1218 // Returns the inherited_access_control_context field of the running thread.
1219 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1220 JVMWrapper("JVM_GetInheritedAccessControlContext");
1221 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1222 return JNIHandles::make_local(env, result);
1223 JVM_END
1224
1225 class RegisterArrayForGC {
1226 private:
1227 JavaThread *_thread;
1228 public:
1229 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1230 _thread = thread;
1231 _thread->register_array_for_gc(array);
1232 }
1233
1234 ~RegisterArrayForGC() {
1235 _thread->register_array_for_gc(NULL);
1236 }
1237 };
1238
1239
1240 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1241 JVMWrapper("JVM_GetStackAccessControlContext");
1242 if (!UsePrivilegedStack) return NULL;
1243
1244 ResourceMark rm(THREAD);
1245 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1246 JvmtiVMObjectAllocEventCollector oam;
1247
1248 // count the protection domains on the execution stack. We collapse
1249 // duplicate consecutive protection domains into a single one, as
1250 // well as stopping when we hit a privileged frame.
1251
1252 oop previous_protection_domain = NULL;
1253 Handle privileged_context(thread, NULL);
1254 bool is_privileged = false;
1255 oop protection_domain = NULL;
1256
1257 // Iterate through Java frames
1258 vframeStream vfst(thread);
1259 for(; !vfst.at_end(); vfst.next()) {
1260 // get method of frame
1261 Method* method = vfst.method();
1262
1263 // stop at the first privileged frame
1264 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1265 method->name() == vmSymbols::executePrivileged_name())
1266 {
1267 // this frame is privileged
1268 is_privileged = true;
1269
1270 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1271
1272 StackValueCollection* locals = priv->locals();
1273 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1274 StackValue* clr_sv = locals->at(2); // Class<?> caller
1275 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1276 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1277 privileged_context = ctx_sv->get_obj();
1278 Handle caller = clr_sv->get_obj();
1279
1280 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1281 protection_domain = caller_klass->protection_domain();
1282 } else {
1283 protection_domain = method->method_holder()->protection_domain();
1284 }
1285
1286 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1287 local_array->push(protection_domain);
1288 previous_protection_domain = protection_domain;
1289 }
1290
1291 if (is_privileged) break;
1292 }
1293
1294
1295 // either all the domains on the stack were system domains, or
1296 // we had a privileged system domain
1297 if (local_array->is_empty()) {
1298 if (is_privileged && privileged_context.is_null()) return NULL;
1299
1300 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1301 return JNIHandles::make_local(env, result);
1302 }
1303
1304 // the resource area must be registered in case of a gc
1305 RegisterArrayForGC ragc(thread, local_array);
1306 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1307 local_array->length(), CHECK_NULL);
1308 objArrayHandle h_context(thread, context);
1309 for (int index = 0; index < local_array->length(); index++) {
1310 h_context->obj_at_put(index, local_array->at(index));
1311 }
1312
1313 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1314
1315 return JNIHandles::make_local(env, result);
1316 JVM_END
1317
1318
1319 JVM_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1320 JVMWrapper("JVM_IsArrayClass");
1321 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1322 return (k != NULL) && k->is_array_klass() ? true : false;
1323 JVM_END
1324
1325
1326 JVM_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1327 JVMWrapper("JVM_IsPrimitiveClass");
1328 oop mirror = JNIHandles::resolve_non_null(cls);
1329 return (jboolean) java_lang_Class::is_primitive(mirror);
1330 JVM_END
1331
1332
1333 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1334 JVMWrapper("JVM_GetClassModifiers");
1335 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1336 // Primitive type
1337 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1338 }
1339
1340 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1341 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1342 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1343 return k->modifier_flags();
1344 JVM_END
1345
1346
1347 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1348
1349 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1350 JvmtiVMObjectAllocEventCollector oam;
1351 // ofClass is a reference to a java_lang_Class object. The mirror object
1352 // of an InstanceKlass
1353
1354 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1355 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1356 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1357 return (jobjectArray)JNIHandles::make_local(env, result);
1358 }
1359
1360 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1361 InnerClassesIterator iter(k);
1362
1363 if (iter.length() == 0) {
1364 // Neither an inner nor outer class
1365 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1366 return (jobjectArray)JNIHandles::make_local(env, result);
1367 }
1368
1369 // find inner class info
1370 constantPoolHandle cp(thread, k->constants());
1371 int length = iter.length();
1372
1373 // Allocate temp. result array
1374 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1375 objArrayHandle result (THREAD, r);
1376 int members = 0;
1377
1378 for (; !iter.done(); iter.next()) {
1379 int ioff = iter.inner_class_info_index();
1380 int ooff = iter.outer_class_info_index();
1381
1382 if (ioff != 0 && ooff != 0) {
1383 // Check to see if the name matches the class we're looking for
1384 // before attempting to find the class.
1385 if (cp->klass_name_at_matches(k, ooff)) {
1386 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1387 if (outer_klass == k) {
1388 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1389 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1390
1391 // Throws an exception if outer klass has not declared k as
1392 // an inner klass
1393 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1394
1395 result->obj_at_put(members, inner_klass->java_mirror());
1396 members++;
1397 }
1398 }
1399 }
1400 }
1401
1402 if (members != length) {
1403 // Return array of right length
1404 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1405 for(int i = 0; i < members; i++) {
1406 res->obj_at_put(i, result->obj_at(i));
1407 }
1408 return (jobjectArray)JNIHandles::make_local(env, res);
1409 }
1410
1411 return (jobjectArray)JNIHandles::make_local(env, result());
1412 JVM_END
1413
1414
1415 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1416 {
1417 // ofClass is a reference to a java_lang_Class object.
1418 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1419 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1420 return NULL;
1421 }
1422
1423 bool inner_is_member = false;
1424 Klass* outer_klass
1425 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1426 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1427 if (outer_klass == NULL) return NULL; // already a top-level class
1428 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1429 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1430 }
1431 JVM_END
1432
1433 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1434 {
1435 oop mirror = JNIHandles::resolve_non_null(cls);
1436 if (java_lang_Class::is_primitive(mirror) ||
1437 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1438 return NULL;
1439 }
1440 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1441 int ooff = 0, noff = 0;
1442 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1443 if (noff != 0) {
1444 constantPoolHandle i_cp(thread, k->constants());
1445 Symbol* name = i_cp->symbol_at(noff);
1446 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1447 return (jstring) JNIHandles::make_local(env, str());
1448 }
1449 }
1450 return NULL;
1451 }
1452 JVM_END
1453
1454 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1455 assert (cls != NULL, "illegal class");
1456 JVMWrapper("JVM_GetClassSignature");
1457 JvmtiVMObjectAllocEventCollector oam;
1458 ResourceMark rm(THREAD);
1459 // Return null for arrays and primatives
1460 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1461 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1462 if (k->is_instance_klass()) {
1463 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1464 if (sym == NULL) return NULL;
1465 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1466 return (jstring) JNIHandles::make_local(env, str());
1467 }
1468 }
1469 return NULL;
1470 JVM_END
1471
1472
1473 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1474 assert (cls != NULL, "illegal class");
1475 JVMWrapper("JVM_GetClassAnnotations");
1476
1477 // Return null for arrays and primitives
1478 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1479 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1480 if (k->is_instance_klass()) {
1481 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1482 return (jbyteArray) JNIHandles::make_local(env, a);
1483 }
1484 }
1485 return NULL;
1486 JVM_END
1487
1488
1489 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1490 // some of this code was adapted from from jni_FromReflectedField
1491
1492 oop reflected = JNIHandles::resolve_non_null(field);
1493 oop mirror = java_lang_reflect_Field::clazz(reflected);
1494 Klass* k = java_lang_Class::as_Klass(mirror);
1495 int slot = java_lang_reflect_Field::slot(reflected);
1496 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1497
1498 InstanceKlass* ik = InstanceKlass::cast(k);
1499 intptr_t offset = ik->field_offset(slot);
1500
1501 if (modifiers & JVM_ACC_STATIC) {
1502 // for static fields we only look in the current class
1503 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1504 assert(false, "cannot find static field");
1505 return false;
1506 }
1507 } else {
1508 // for instance fields we start with the current class and work
1509 // our way up through the superclass chain
1510 if (!ik->find_field_from_offset(offset, false, &fd)) {
1511 assert(false, "cannot find instance field");
1512 return false;
1513 }
1514 }
1515 return true;
1516 }
1517
1518 static Method* jvm_get_method_common(jobject method) {
1519 // some of this code was adapted from from jni_FromReflectedMethod
1520
1521 oop reflected = JNIHandles::resolve_non_null(method);
1522 oop mirror = NULL;
1523 int slot = 0;
1524
1525 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1526 mirror = java_lang_reflect_Constructor::clazz(reflected);
1527 slot = java_lang_reflect_Constructor::slot(reflected);
1528 } else {
1529 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1530 "wrong type");
1531 mirror = java_lang_reflect_Method::clazz(reflected);
1532 slot = java_lang_reflect_Method::slot(reflected);
1533 }
1534 Klass* k = java_lang_Class::as_Klass(mirror);
1535
1536 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1537 assert(m != NULL, "cannot find method");
1538 return m; // caller has to deal with NULL in product mode
1539 }
1540
1541 /* Type use annotations support (JDK 1.8) */
1542
1543 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1544 assert (cls != NULL, "illegal class");
1545 JVMWrapper("JVM_GetClassTypeAnnotations");
1546 ResourceMark rm(THREAD);
1547 // Return null for arrays and primitives
1548 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1550 if (k->is_instance_klass()) {
1551 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1552 if (type_annotations != NULL) {
1553 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1554 return (jbyteArray) JNIHandles::make_local(env, a);
1555 }
1556 }
1557 }
1558 return NULL;
1559 JVM_END
1560
1561 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1562 assert (method != NULL, "illegal method");
1563 JVMWrapper("JVM_GetMethodTypeAnnotations");
1564
1565 // method is a handle to a java.lang.reflect.Method object
1566 Method* m = jvm_get_method_common(method);
1567 if (m == NULL) {
1568 return NULL;
1569 }
1570
1571 AnnotationArray* type_annotations = m->type_annotations();
1572 if (type_annotations != NULL) {
1573 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1574 return (jbyteArray) JNIHandles::make_local(env, a);
1575 }
1576
1577 return NULL;
1578 JVM_END
1579
1580 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1581 assert (field != NULL, "illegal field");
1582 JVMWrapper("JVM_GetFieldTypeAnnotations");
1583
1584 fieldDescriptor fd;
1585 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1586 if (!gotFd) {
1587 return NULL;
1588 }
1589
1590 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1591 JVM_END
1592
1593 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1594 if (!cp->is_within_bounds(index)) {
1595 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1596 }
1597 }
1598
1599 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1600 {
1601 JVMWrapper("JVM_GetMethodParameters");
1602 // method is a handle to a java.lang.reflect.Method object
1603 Method* method_ptr = jvm_get_method_common(method);
1604 methodHandle mh (THREAD, method_ptr);
1605 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1606 const int num_params = mh->method_parameters_length();
1607
1608 if (num_params < 0) {
1609 // A -1 return value from method_parameters_length means there is no
1610 // parameter data. Return null to indicate this to the reflection
1611 // API.
1612 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1613 return (jobjectArray)NULL;
1614 } else {
1615 // Otherwise, we return something up to reflection, even if it is
1616 // a zero-length array. Why? Because in some cases this can
1617 // trigger a MalformedParametersException.
1618
1619 // make sure all the symbols are properly formatted
1620 for (int i = 0; i < num_params; i++) {
1621 MethodParametersElement* params = mh->method_parameters_start();
1622 int index = params[i].name_cp_index;
1623 constantPoolHandle cp(THREAD, mh->constants());
1624 bounds_check(cp, index, CHECK_NULL);
1625
1626 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1627 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1628 "Wrong type at constant pool index");
1629 }
1630
1631 }
1632
1633 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1634 objArrayHandle result (THREAD, result_oop);
1635
1636 for (int i = 0; i < num_params; i++) {
1637 MethodParametersElement* params = mh->method_parameters_start();
1638 // For a 0 index, give a NULL symbol
1639 Symbol* sym = 0 != params[i].name_cp_index ?
1640 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1641 int flags = params[i].flags;
1642 oop param = Reflection::new_parameter(reflected_method, i, sym,
1643 flags, CHECK_NULL);
1644 result->obj_at_put(i, param);
1645 }
1646 return (jobjectArray)JNIHandles::make_local(env, result());
1647 }
1648 }
1649 JVM_END
1650
1651 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1652
1653 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1654 {
1655 JVMWrapper("JVM_GetClassDeclaredFields");
1656 JvmtiVMObjectAllocEventCollector oam;
1657
1658 // Exclude primitive types and array types
1659 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1660 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1661 // Return empty array
1662 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1663 return (jobjectArray) JNIHandles::make_local(env, res);
1664 }
1665
1666 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1667 constantPoolHandle cp(THREAD, k->constants());
1668
1669 // Ensure class is linked
1670 k->link_class(CHECK_NULL);
1671
1672 // Allocate result
1673 int num_fields;
1674
1675 if (publicOnly) {
1676 num_fields = 0;
1677 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1678 if (fs.access_flags().is_public()) ++num_fields;
1679 }
1680 } else {
1681 num_fields = k->java_fields_count();
1682 }
1683
1684 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1685 objArrayHandle result (THREAD, r);
1686
1687 int out_idx = 0;
1688 fieldDescriptor fd;
1689 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1690 if (!publicOnly || fs.access_flags().is_public()) {
1691 fd.reinitialize(k, fs.index());
1692 oop field = Reflection::new_field(&fd, CHECK_NULL);
1693 result->obj_at_put(out_idx, field);
1694 ++out_idx;
1695 }
1696 }
1697 assert(out_idx == num_fields, "just checking");
1698 return (jobjectArray) JNIHandles::make_local(env, result());
1699 }
1700 JVM_END
1701
1702 JVM_ENTRY(jboolean, JVM_IsRecord(JNIEnv *env, jclass cls))
1703 {
1704 JVMWrapper("JVM_IsRecord");
1705 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1706 if (k != NULL && k->is_instance_klass()) {
1707 InstanceKlass* ik = InstanceKlass::cast(k);
1708 return ik->is_record();
1709 } else {
1710 return false;
1711 }
1712 }
1713 JVM_END
1714
1715 JVM_ENTRY(jobjectArray, JVM_GetRecordComponents(JNIEnv* env, jclass ofClass))
1716 {
1717 JVMWrapper("JVM_GetRecordComponents");
1718 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass));
1719 assert(c->is_instance_klass(), "must be");
1720 InstanceKlass* ik = InstanceKlass::cast(c);
1721
1722 if (ik->is_record()) {
1723 Array<RecordComponent*>* components = ik->record_components();
1724 assert(components != NULL, "components should not be NULL");
1725 {
1726 JvmtiVMObjectAllocEventCollector oam;
1727 constantPoolHandle cp(THREAD, ik->constants());
1728 int length = components->length();
1729 assert(length >= 0, "unexpected record_components length");
1730 objArrayOop record_components =
1731 oopFactory::new_objArray(SystemDictionary::RecordComponent_klass(), length, CHECK_NULL);
1732 objArrayHandle components_h (THREAD, record_components);
1733
1734 for (int x = 0; x < length; x++) {
1735 RecordComponent* component = components->at(x);
1736 assert(component != NULL, "unexpected NULL record component");
1737 oop component_oop = java_lang_reflect_RecordComponent::create(ik, component, CHECK_NULL);
1738 components_h->obj_at_put(x, component_oop);
1739 }
1740 return (jobjectArray)JNIHandles::make_local(components_h());
1741 }
1742 }
1743
1744 // Return empty array if ofClass is not a record.
1745 objArrayOop result = oopFactory::new_objArray(SystemDictionary::RecordComponent_klass(), 0, CHECK_NULL);
1746 return (jobjectArray)JNIHandles::make_local(env, result);
1747 }
1748 JVM_END
1749
1750 static bool select_method(const methodHandle& method, bool want_constructor) {
1751 if (want_constructor) {
1752 return (method->is_initializer() && !method->is_static());
1753 } else {
1754 return (!method->is_initializer() && !method->is_overpass());
1755 }
1756 }
1757
1758 static jobjectArray get_class_declared_methods_helper(
1759 JNIEnv *env,
1760 jclass ofClass, jboolean publicOnly,
1761 bool want_constructor,
1762 Klass* klass, TRAPS) {
1763
1764 JvmtiVMObjectAllocEventCollector oam;
1765
1766 // Exclude primitive types and array types
1767 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1768 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1769 // Return empty array
1770 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1771 return (jobjectArray) JNIHandles::make_local(env, res);
1772 }
1773
1774 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1775
1776 // Ensure class is linked
1777 k->link_class(CHECK_NULL);
1778
1779 Array<Method*>* methods = k->methods();
1780 int methods_length = methods->length();
1781
1782 // Save original method_idnum in case of redefinition, which can change
1783 // the idnum of obsolete methods. The new method will have the same idnum
1784 // but if we refresh the methods array, the counts will be wrong.
1785 ResourceMark rm(THREAD);
1786 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1787 int num_methods = 0;
1788
1789 for (int i = 0; i < methods_length; i++) {
1790 methodHandle method(THREAD, methods->at(i));
1791 if (select_method(method, want_constructor)) {
1792 if (!publicOnly || method->is_public()) {
1793 idnums->push(method->method_idnum());
1794 ++num_methods;
1795 }
1796 }
1797 }
1798
1799 // Allocate result
1800 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1801 objArrayHandle result (THREAD, r);
1802
1803 // Now just put the methods that we selected above, but go by their idnum
1804 // in case of redefinition. The methods can be redefined at any safepoint,
1805 // so above when allocating the oop array and below when creating reflect
1806 // objects.
1807 for (int i = 0; i < num_methods; i++) {
1808 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1809 if (method.is_null()) {
1810 // Method may have been deleted and seems this API can handle null
1811 // Otherwise should probably put a method that throws NSME
1812 result->obj_at_put(i, NULL);
1813 } else {
1814 oop m;
1815 if (want_constructor) {
1816 m = Reflection::new_constructor(method, CHECK_NULL);
1817 } else {
1818 m = Reflection::new_method(method, false, CHECK_NULL);
1819 }
1820 result->obj_at_put(i, m);
1821 }
1822 }
1823
1824 return (jobjectArray) JNIHandles::make_local(env, result());
1825 }
1826
1827 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1828 {
1829 JVMWrapper("JVM_GetClassDeclaredMethods");
1830 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1831 /*want_constructor*/ false,
1832 SystemDictionary::reflect_Method_klass(), THREAD);
1833 }
1834 JVM_END
1835
1836 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1837 {
1838 JVMWrapper("JVM_GetClassDeclaredConstructors");
1839 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1840 /*want_constructor*/ true,
1841 SystemDictionary::reflect_Constructor_klass(), THREAD);
1842 }
1843 JVM_END
1844
1845 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1846 {
1847 JVMWrapper("JVM_GetClassAccessFlags");
1848 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1849 // Primitive type
1850 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1851 }
1852
1853 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1854 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1855 }
1856 JVM_END
1857
1858 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1859 {
1860 JVMWrapper("JVM_AreNestMates");
1861 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1862 assert(c->is_instance_klass(), "must be");
1863 InstanceKlass* ck = InstanceKlass::cast(c);
1864 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1865 assert(m->is_instance_klass(), "must be");
1866 InstanceKlass* mk = InstanceKlass::cast(m);
1867 return ck->has_nestmate_access_to(mk, THREAD);
1868 }
1869 JVM_END
1870
1871 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1872 {
1873 // current is not a primitive or array class
1874 JVMWrapper("JVM_GetNestHost");
1875 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1876 assert(c->is_instance_klass(), "must be");
1877 InstanceKlass* ck = InstanceKlass::cast(c);
1878 // Don't post exceptions if validation fails
1879 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1880 return (jclass) (host == NULL ? NULL :
1881 JNIHandles::make_local(THREAD, host->java_mirror()));
1882 }
1883 JVM_END
1884
1885 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1886 {
1887 // current is not a primitive or array class
1888 JVMWrapper("JVM_GetNestMembers");
1889 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1890 assert(c->is_instance_klass(), "must be");
1891 InstanceKlass* ck = InstanceKlass::cast(c);
1892 // Get the nest host for this nest - throw ICCE if validation fails
1893 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1894 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1895
1896 {
1897 JvmtiVMObjectAllocEventCollector oam;
1898 Array<u2>* members = host->nest_members();
1899 int length = members == NULL ? 0 : members->length();
1900 // nest host is first in the array so make it one bigger
1901 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1902 length + 1, CHECK_NULL);
1903 objArrayHandle result (THREAD, r);
1904 result->obj_at_put(0, host->java_mirror());
1905 if (length != 0) {
1906 int i;
1907 for (i = 0; i < length; i++) {
1908 int cp_index = members->at(i);
1909 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1910 if (k->is_instance_klass()) {
1911 InstanceKlass* nest_host_k =
1912 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1913 if (nest_host_k == host) {
1914 result->obj_at_put(i+1, k->java_mirror());
1915 }
1916 else {
1917 // k's nest host is legal but it isn't our host so
1918 // throw ICCE
1919 ResourceMark rm(THREAD);
1920 Exceptions::fthrow(THREAD_AND_LOCATION,
1921 icce,
1922 "Nest member %s in %s declares a different nest host of %s",
1923 k->external_name(),
1924 host->external_name(),
1925 nest_host_k->external_name()
1926 );
1927 return NULL;
1928 }
1929 }
1930 else {
1931 // we have a bad nest member entry - throw ICCE
1932 ResourceMark rm(THREAD);
1933 Exceptions::fthrow(THREAD_AND_LOCATION,
1934 icce,
1935 "Class %s can not be a nest member of %s",
1936 k->external_name(),
1937 host->external_name()
1938 );
1939 return NULL;
1940 }
1941 }
1942 }
1943 else {
1944 assert(host == ck, "must be singleton nest");
1945 }
1946 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1947 }
1948 }
1949 JVM_END
1950
1951 // Constant pool access //////////////////////////////////////////////////////////
1952
1953 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1954 {
1955 JVMWrapper("JVM_GetClassConstantPool");
1956 JvmtiVMObjectAllocEventCollector oam;
1957
1958 // Return null for primitives and arrays
1959 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1960 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1961 if (k->is_instance_klass()) {
1962 InstanceKlass* k_h = InstanceKlass::cast(k);
1963 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1964 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1965 return JNIHandles::make_local(jcp());
1966 }
1967 }
1968 return NULL;
1969 }
1970 JVM_END
1971
1972
1973 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1974 {
1975 JVMWrapper("JVM_ConstantPoolGetSize");
1976 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1977 return cp->length();
1978 }
1979 JVM_END
1980
1981
1982 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1983 {
1984 JVMWrapper("JVM_ConstantPoolGetClassAt");
1985 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1986 bounds_check(cp, index, CHECK_NULL);
1987 constantTag tag = cp->tag_at(index);
1988 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1989 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1990 }
1991 Klass* k = cp->klass_at(index, CHECK_NULL);
1992 return (jclass) JNIHandles::make_local(k->java_mirror());
1993 }
1994 JVM_END
1995
1996 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1997 {
1998 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1999 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2000 bounds_check(cp, index, CHECK_NULL);
2001 constantTag tag = cp->tag_at(index);
2002 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2003 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2004 }
2005 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2006 if (k == NULL) return NULL;
2007 return (jclass) JNIHandles::make_local(k->java_mirror());
2008 }
2009 JVM_END
2010
2011 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
2012 constantTag tag = cp->tag_at(index);
2013 if (!tag.is_method() && !tag.is_interface_method()) {
2014 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2015 }
2016 int klass_ref = cp->uncached_klass_ref_index_at(index);
2017 Klass* k_o;
2018 if (force_resolution) {
2019 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2020 } else {
2021 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2022 if (k_o == NULL) return NULL;
2023 }
2024 InstanceKlass* k = InstanceKlass::cast(k_o);
2025 Symbol* name = cp->uncached_name_ref_at(index);
2026 Symbol* sig = cp->uncached_signature_ref_at(index);
2027 methodHandle m (THREAD, k->find_method(name, sig));
2028 if (m.is_null()) {
2029 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2030 }
2031 oop method;
2032 if (!m->is_initializer() || m->is_static()) {
2033 method = Reflection::new_method(m, true, CHECK_NULL);
2034 } else {
2035 method = Reflection::new_constructor(m, CHECK_NULL);
2036 }
2037 return JNIHandles::make_local(method);
2038 }
2039
2040 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2041 {
2042 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2043 JvmtiVMObjectAllocEventCollector oam;
2044 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2045 bounds_check(cp, index, CHECK_NULL);
2046 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2047 return res;
2048 }
2049 JVM_END
2050
2051 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2052 {
2053 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2054 JvmtiVMObjectAllocEventCollector oam;
2055 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2056 bounds_check(cp, index, CHECK_NULL);
2057 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2058 return res;
2059 }
2060 JVM_END
2061
2062 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2063 constantTag tag = cp->tag_at(index);
2064 if (!tag.is_field()) {
2065 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2066 }
2067 int klass_ref = cp->uncached_klass_ref_index_at(index);
2068 Klass* k_o;
2069 if (force_resolution) {
2070 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2071 } else {
2072 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2073 if (k_o == NULL) return NULL;
2074 }
2075 InstanceKlass* k = InstanceKlass::cast(k_o);
2076 Symbol* name = cp->uncached_name_ref_at(index);
2077 Symbol* sig = cp->uncached_signature_ref_at(index);
2078 fieldDescriptor fd;
2079 Klass* target_klass = k->find_field(name, sig, &fd);
2080 if (target_klass == NULL) {
2081 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2082 }
2083 oop field = Reflection::new_field(&fd, CHECK_NULL);
2084 return JNIHandles::make_local(field);
2085 }
2086
2087 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2088 {
2089 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2090 JvmtiVMObjectAllocEventCollector oam;
2091 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2092 bounds_check(cp, index, CHECK_NULL);
2093 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2094 return res;
2095 }
2096 JVM_END
2097
2098 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2099 {
2100 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2101 JvmtiVMObjectAllocEventCollector oam;
2102 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2103 bounds_check(cp, index, CHECK_NULL);
2104 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2105 return res;
2106 }
2107 JVM_END
2108
2109 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2110 {
2111 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2112 JvmtiVMObjectAllocEventCollector oam;
2113 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2114 bounds_check(cp, index, CHECK_NULL);
2115 constantTag tag = cp->tag_at(index);
2116 if (!tag.is_field_or_method()) {
2117 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2118 }
2119 int klass_ref = cp->uncached_klass_ref_index_at(index);
2120 Symbol* klass_name = cp->klass_name_at(klass_ref);
2121 Symbol* member_name = cp->uncached_name_ref_at(index);
2122 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2123 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2124 objArrayHandle dest(THREAD, dest_o);
2125 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2126 dest->obj_at_put(0, str());
2127 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2128 dest->obj_at_put(1, str());
2129 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2130 dest->obj_at_put(2, str());
2131 return (jobjectArray) JNIHandles::make_local(dest());
2132 }
2133 JVM_END
2134
2135 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2136 {
2137 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2138 JvmtiVMObjectAllocEventCollector oam;
2139 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2140 bounds_check(cp, index, CHECK_0);
2141 constantTag tag = cp->tag_at(index);
2142 if (!tag.is_field_or_method()) {
2143 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2144 }
2145 return (jint) cp->uncached_klass_ref_index_at(index);
2146 }
2147 JVM_END
2148
2149 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2150 {
2151 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2152 JvmtiVMObjectAllocEventCollector oam;
2153 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2154 bounds_check(cp, index, CHECK_0);
2155 constantTag tag = cp->tag_at(index);
2156 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2157 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2158 }
2159 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2160 }
2161 JVM_END
2162
2163 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2164 {
2165 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2166 JvmtiVMObjectAllocEventCollector oam;
2167 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2168 bounds_check(cp, index, CHECK_NULL);
2169 constantTag tag = cp->tag_at(index);
2170 if (!tag.is_name_and_type()) {
2171 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2172 }
2173 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2174 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2175 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2176 objArrayHandle dest(THREAD, dest_o);
2177 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2178 dest->obj_at_put(0, str());
2179 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2180 dest->obj_at_put(1, str());
2181 return (jobjectArray) JNIHandles::make_local(dest());
2182 }
2183 JVM_END
2184
2185 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2186 {
2187 JVMWrapper("JVM_ConstantPoolGetIntAt");
2188 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2189 bounds_check(cp, index, CHECK_0);
2190 constantTag tag = cp->tag_at(index);
2191 if (!tag.is_int()) {
2192 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2193 }
2194 return cp->int_at(index);
2195 }
2196 JVM_END
2197
2198 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2199 {
2200 JVMWrapper("JVM_ConstantPoolGetLongAt");
2201 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2202 bounds_check(cp, index, CHECK_(0L));
2203 constantTag tag = cp->tag_at(index);
2204 if (!tag.is_long()) {
2205 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2206 }
2207 return cp->long_at(index);
2208 }
2209 JVM_END
2210
2211 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2212 {
2213 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2214 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2215 bounds_check(cp, index, CHECK_(0.0f));
2216 constantTag tag = cp->tag_at(index);
2217 if (!tag.is_float()) {
2218 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2219 }
2220 return cp->float_at(index);
2221 }
2222 JVM_END
2223
2224 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2225 {
2226 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2227 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2228 bounds_check(cp, index, CHECK_(0.0));
2229 constantTag tag = cp->tag_at(index);
2230 if (!tag.is_double()) {
2231 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2232 }
2233 return cp->double_at(index);
2234 }
2235 JVM_END
2236
2237 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2238 {
2239 JVMWrapper("JVM_ConstantPoolGetStringAt");
2240 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2241 bounds_check(cp, index, CHECK_NULL);
2242 constantTag tag = cp->tag_at(index);
2243 if (!tag.is_string()) {
2244 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2245 }
2246 oop str = cp->string_at(index, CHECK_NULL);
2247 return (jstring) JNIHandles::make_local(str);
2248 }
2249 JVM_END
2250
2251 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2252 {
2253 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2254 JvmtiVMObjectAllocEventCollector oam;
2255 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2256 bounds_check(cp, index, CHECK_NULL);
2257 constantTag tag = cp->tag_at(index);
2258 if (!tag.is_symbol()) {
2259 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2260 }
2261 Symbol* sym = cp->symbol_at(index);
2262 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2263 return (jstring) JNIHandles::make_local(str());
2264 }
2265 JVM_END
2266
2267 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2268 {
2269 JVMWrapper("JVM_ConstantPoolGetTagAt");
2270 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2271 bounds_check(cp, index, CHECK_0);
2272 constantTag tag = cp->tag_at(index);
2273 jbyte result = tag.value();
2274 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2275 // they are changed to the corresponding tags from the JVM spec, so that java code in
2276 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2277 if (tag.is_klass_or_reference()) {
2278 result = JVM_CONSTANT_Class;
2279 } else if (tag.is_string_index()) {
2280 result = JVM_CONSTANT_String;
2281 } else if (tag.is_method_type_in_error()) {
2282 result = JVM_CONSTANT_MethodType;
2283 } else if (tag.is_method_handle_in_error()) {
2284 result = JVM_CONSTANT_MethodHandle;
2285 } else if (tag.is_dynamic_constant_in_error()) {
2286 result = JVM_CONSTANT_Dynamic;
2287 }
2288 return result;
2289 }
2290 JVM_END
2291
2292 // Assertion support. //////////////////////////////////////////////////////////
2293
2294 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2295 JVMWrapper("JVM_DesiredAssertionStatus");
2296 assert(cls != NULL, "bad class");
2297
2298 oop r = JNIHandles::resolve(cls);
2299 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2300 if (java_lang_Class::is_primitive(r)) return false;
2301
2302 Klass* k = java_lang_Class::as_Klass(r);
2303 assert(k->is_instance_klass(), "must be an instance klass");
2304 if (!k->is_instance_klass()) return false;
2305
2306 ResourceMark rm(THREAD);
2307 const char* name = k->name()->as_C_string();
2308 bool system_class = k->class_loader() == NULL;
2309 return JavaAssertions::enabled(name, system_class);
2310
2311 JVM_END
2312
2313
2314 // Return a new AssertionStatusDirectives object with the fields filled in with
2315 // command-line assertion arguments (i.e., -ea, -da).
2316 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2317 JVMWrapper("JVM_AssertionStatusDirectives");
2318 JvmtiVMObjectAllocEventCollector oam;
2319 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2320 return JNIHandles::make_local(env, asd);
2321 JVM_END
2322
2323 // Verification ////////////////////////////////////////////////////////////////////////////////
2324
2325 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2326
2327 // RedefineClasses support: bug 6214132 caused verification to fail.
2328 // All functions from this section should call the jvmtiThreadSate function:
2329 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2330 // The function returns a Klass* of the _scratch_class if the verifier
2331 // was invoked in the middle of the class redefinition.
2332 // Otherwise it returns its argument value which is the _the_class Klass*.
2333 // Please, refer to the description in the jvmtiThreadSate.hpp.
2334
2335 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2336 JVMWrapper("JVM_GetClassNameUTF");
2337 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2338 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339 return k->name()->as_utf8();
2340 JVM_END
2341
2342
2343 JVM_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2344 JVMWrapper("JVM_GetClassCPTypes");
2345 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347 // types will have length zero if this is not an InstanceKlass
2348 // (length is determined by call to JVM_GetClassCPEntriesCount)
2349 if (k->is_instance_klass()) {
2350 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2351 for (int index = cp->length() - 1; index >= 0; index--) {
2352 constantTag tag = cp->tag_at(index);
2353 types[index] = (tag.is_unresolved_klass()) ? (unsigned char) JVM_CONSTANT_Class : tag.value();
2354 }
2355 }
2356 JVM_END
2357
2358
2359 JVM_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2360 JVMWrapper("JVM_GetClassCPEntriesCount");
2361 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2362 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2363 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2364 JVM_END
2365
2366
2367 JVM_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2368 JVMWrapper("JVM_GetClassFieldsCount");
2369 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2370 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2371 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2372 JVM_END
2373
2374
2375 JVM_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2376 JVMWrapper("JVM_GetClassMethodsCount");
2377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2378 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2379 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2380 JVM_END
2381
2382
2383 // The following methods, used for the verifier, are never called with
2384 // array klasses, so a direct cast to InstanceKlass is safe.
2385 // Typically, these methods are called in a loop with bounds determined
2386 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2387 // zero for arrays.
2388 JVM_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2389 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2393 int length = method->checked_exceptions_length();
2394 if (length > 0) {
2395 CheckedExceptionElement* table= method->checked_exceptions_start();
2396 for (int i = 0; i < length; i++) {
2397 exceptions[i] = table[i].class_cp_index;
2398 }
2399 }
2400 JVM_END
2401
2402
2403 JVM_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2404 JVMWrapper("JVM_GetMethodIxExceptionsCount");
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->checked_exceptions_length();
2409 JVM_END
2410
2411
2412 JVM_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2413 JVMWrapper("JVM_GetMethodIxByteCode");
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 memcpy(code, method->code_base(), method->code_size());
2418 JVM_END
2419
2420
2421 JVM_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2422 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2423 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2424 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2425 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2426 return method->code_size();
2427 JVM_END
2428
2429
2430 JVM_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2431 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2432 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2433 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2434 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2435 ExceptionTable extable(method);
2436 entry->start_pc = extable.start_pc(entry_index);
2437 entry->end_pc = extable.end_pc(entry_index);
2438 entry->handler_pc = extable.handler_pc(entry_index);
2439 entry->catchType = extable.catch_type_index(entry_index);
2440 JVM_END
2441
2442
2443 JVM_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2444 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2448 return method->exception_table_length();
2449 JVM_END
2450
2451
2452 JVM_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2453 JVMWrapper("JVM_GetMethodIxModifiers");
2454 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2455 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2456 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2457 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2458 JVM_END
2459
2460
2461 JVM_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2462 JVMWrapper("JVM_GetFieldIxModifiers");
2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2466 JVM_END
2467
2468
2469 JVM_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2470 JVMWrapper("JVM_GetMethodIxLocalsCount");
2471 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2472 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2473 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2474 return method->max_locals();
2475 JVM_END
2476
2477
2478 JVM_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2479 JVMWrapper("JVM_GetMethodIxArgsSize");
2480 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2481 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2482 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2483 return method->size_of_parameters();
2484 JVM_END
2485
2486
2487 JVM_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2488 JVMWrapper("JVM_GetMethodIxMaxStack");
2489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2490 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2491 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2492 return method->verifier_max_stack();
2493 JVM_END
2494
2495
2496 JVM_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2497 JVMWrapper("JVM_IsConstructorIx");
2498 ResourceMark rm(THREAD);
2499 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2500 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2501 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2502 return method->name() == vmSymbols::object_initializer_name();
2503 JVM_END
2504
2505
2506 JVM_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2507 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2508 ResourceMark rm(THREAD);
2509 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2510 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2511 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2512 return method->is_overpass();
2513 JVM_END
2514
2515 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2516 JVMWrapper("JVM_GetMethodIxIxUTF");
2517 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2518 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2519 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2520 return method->name()->as_utf8();
2521 JVM_END
2522
2523
2524 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2525 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2526 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2527 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2528 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2529 return method->signature()->as_utf8();
2530 JVM_END
2531
2532 /**
2533 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2534 * read entries in the constant pool. Since the old verifier always
2535 * works on a copy of the code, it will not see any rewriting that
2536 * may possibly occur in the middle of verification. So it is important
2537 * that nothing it calls tries to use the cpCache instead of the raw
2538 * constant pool, so we must use cp->uncached_x methods when appropriate.
2539 */
2540 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2541 JVMWrapper("JVM_GetCPFieldNameUTF");
2542 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2543 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2544 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2545 switch (cp->tag_at(cp_index).value()) {
2546 case JVM_CONSTANT_Fieldref:
2547 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2548 default:
2549 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2550 }
2551 ShouldNotReachHere();
2552 return NULL;
2553 JVM_END
2554
2555
2556 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2557 JVMWrapper("JVM_GetCPMethodNameUTF");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2561 switch (cp->tag_at(cp_index).value()) {
2562 case JVM_CONSTANT_InterfaceMethodref:
2563 case JVM_CONSTANT_Methodref:
2564 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2565 default:
2566 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2567 }
2568 ShouldNotReachHere();
2569 return NULL;
2570 JVM_END
2571
2572
2573 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2574 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2576 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 switch (cp->tag_at(cp_index).value()) {
2579 case JVM_CONSTANT_InterfaceMethodref:
2580 case JVM_CONSTANT_Methodref:
2581 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2582 default:
2583 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2584 }
2585 ShouldNotReachHere();
2586 return NULL;
2587 JVM_END
2588
2589
2590 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2591 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2592 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2593 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2594 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2595 switch (cp->tag_at(cp_index).value()) {
2596 case JVM_CONSTANT_Fieldref:
2597 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2598 default:
2599 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2600 }
2601 ShouldNotReachHere();
2602 return NULL;
2603 JVM_END
2604
2605
2606 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2607 JVMWrapper("JVM_GetCPClassNameUTF");
2608 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2609 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2610 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2611 Symbol* classname = cp->klass_name_at(cp_index);
2612 return classname->as_utf8();
2613 JVM_END
2614
2615
2616 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2617 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2618 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2620 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2621 switch (cp->tag_at(cp_index).value()) {
2622 case JVM_CONSTANT_Fieldref: {
2623 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2624 Symbol* classname = cp->klass_name_at(class_index);
2625 return classname->as_utf8();
2626 }
2627 default:
2628 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2629 }
2630 ShouldNotReachHere();
2631 return NULL;
2632 JVM_END
2633
2634
2635 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2636 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2637 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2638 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2639 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2640 switch (cp->tag_at(cp_index).value()) {
2641 case JVM_CONSTANT_Methodref:
2642 case JVM_CONSTANT_InterfaceMethodref: {
2643 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2644 Symbol* classname = cp->klass_name_at(class_index);
2645 return classname->as_utf8();
2646 }
2647 default:
2648 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2649 }
2650 ShouldNotReachHere();
2651 return NULL;
2652 JVM_END
2653
2654
2655 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2656 JVMWrapper("JVM_GetCPFieldModifiers");
2657 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2658 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2659 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2660 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2661 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2662 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2663 switch (cp->tag_at(cp_index).value()) {
2664 case JVM_CONSTANT_Fieldref: {
2665 Symbol* name = cp->uncached_name_ref_at(cp_index);
2666 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2667 InstanceKlass* ik = InstanceKlass::cast(k_called);
2668 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2669 if (fs.name() == name && fs.signature() == signature) {
2670 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2671 }
2672 }
2673 return -1;
2674 }
2675 default:
2676 fatal("JVM_GetCPFieldModifiers: illegal constant");
2677 }
2678 ShouldNotReachHere();
2679 return 0;
2680 JVM_END
2681
2682
2683 JVM_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2684 JVMWrapper("JVM_GetCPMethodModifiers");
2685 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2686 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2687 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2688 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2689 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2690 switch (cp->tag_at(cp_index).value()) {
2691 case JVM_CONSTANT_Methodref:
2692 case JVM_CONSTANT_InterfaceMethodref: {
2693 Symbol* name = cp->uncached_name_ref_at(cp_index);
2694 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2695 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2696 int methods_count = methods->length();
2697 for (int i = 0; i < methods_count; i++) {
2698 Method* method = methods->at(i);
2699 if (method->name() == name && method->signature() == signature) {
2700 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2701 }
2702 }
2703 return -1;
2704 }
2705 default:
2706 fatal("JVM_GetCPMethodModifiers: illegal constant");
2707 }
2708 ShouldNotReachHere();
2709 return 0;
2710 JVM_END
2711
2712
2713 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2714
2715 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2716 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2717 JVM_END
2718
2719
2720 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2721 JVMWrapper("JVM_IsSameClassPackage");
2722 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2723 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2724 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2725 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2726 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2727 JVM_END
2728
2729 // Printing support //////////////////////////////////////////////////
2730 extern "C" {
2731
2732 ATTRIBUTE_PRINTF(3, 0)
2733 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2734 // Reject count values that are negative signed values converted to
2735 // unsigned; see bug 4399518, 4417214
2736 if ((intptr_t)count <= 0) return -1;
2737
2738 int result = os::vsnprintf(str, count, fmt, args);
2739 if (result > 0 && (size_t)result >= count) {
2740 result = -1;
2741 }
2742
2743 return result;
2744 }
2745
2746 ATTRIBUTE_PRINTF(3, 4)
2747 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2748 va_list args;
2749 int len;
2750 va_start(args, fmt);
2751 len = jio_vsnprintf(str, count, fmt, args);
2752 va_end(args);
2753 return len;
2754 }
2755
2756 ATTRIBUTE_PRINTF(2, 3)
2757 int jio_fprintf(FILE* f, const char *fmt, ...) {
2758 int len;
2759 va_list args;
2760 va_start(args, fmt);
2761 len = jio_vfprintf(f, fmt, args);
2762 va_end(args);
2763 return len;
2764 }
2765
2766 ATTRIBUTE_PRINTF(2, 0)
2767 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2768 if (Arguments::vfprintf_hook() != NULL) {
2769 return Arguments::vfprintf_hook()(f, fmt, args);
2770 } else {
2771 return vfprintf(f, fmt, args);
2772 }
2773 }
2774
2775 ATTRIBUTE_PRINTF(1, 2)
2776 JNIEXPORT int jio_printf(const char *fmt, ...) {
2777 int len;
2778 va_list args;
2779 va_start(args, fmt);
2780 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2781 va_end(args);
2782 return len;
2783 }
2784
2785 // HotSpot specific jio method
2786 void jio_print(const char* s, size_t len) {
2787 // Try to make this function as atomic as possible.
2788 if (Arguments::vfprintf_hook() != NULL) {
2789 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2790 } else {
2791 // Make an unused local variable to avoid warning from gcc compiler.
2792 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2793 }
2794 }
2795
2796 } // Extern C
2797
2798 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2799
2800 // In most of the JVM thread support functions we need to access the
2801 // thread through a ThreadsListHandle to prevent it from exiting and
2802 // being reclaimed while we try to operate on it. The exceptions to this
2803 // rule are when operating on the current thread, or if the monitor of
2804 // the target java.lang.Thread is locked at the Java level - in both
2805 // cases the target cannot exit.
2806
2807 static void thread_entry(JavaThread* thread, TRAPS) {
2808 HandleMark hm(THREAD);
2809 Handle obj(THREAD, thread->threadObj());
2810 JavaValue result(T_VOID);
2811 JavaCalls::call_virtual(&result,
2812 obj,
2813 SystemDictionary::Thread_klass(),
2814 vmSymbols::run_method_name(),
2815 vmSymbols::void_method_signature(),
2816 THREAD);
2817 }
2818
2819
2820 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2821 JVMWrapper("JVM_StartThread");
2822 JavaThread *native_thread = NULL;
2823
2824 // We cannot hold the Threads_lock when we throw an exception,
2825 // due to rank ordering issues. Example: we might need to grab the
2826 // Heap_lock while we construct the exception.
2827 bool throw_illegal_thread_state = false;
2828
2829 // We must release the Threads_lock before we can post a jvmti event
2830 // in Thread::start.
2831 {
2832 // Ensure that the C++ Thread and OSThread structures aren't freed before
2833 // we operate.
2834 MutexLocker mu(Threads_lock);
2835
2836 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2837 // re-starting an already started thread, so we should usually find
2838 // that the JavaThread is null. However for a JNI attached thread
2839 // there is a small window between the Thread object being created
2840 // (with its JavaThread set) and the update to its threadStatus, so we
2841 // have to check for this
2842 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2843 throw_illegal_thread_state = true;
2844 } else {
2845 // We could also check the stillborn flag to see if this thread was already stopped, but
2846 // for historical reasons we let the thread detect that itself when it starts running
2847
2848 jlong size =
2849 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2850 // Allocate the C++ Thread structure and create the native thread. The
2851 // stack size retrieved from java is 64-bit signed, but the constructor takes
2852 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2853 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2854 // - Avoid passing negative values which would result in really large stacks.
2855 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2856 size_t sz = size > 0 ? (size_t) size : 0;
2857 native_thread = new JavaThread(&thread_entry, sz);
2858
2859 // At this point it may be possible that no osthread was created for the
2860 // JavaThread due to lack of memory. Check for this situation and throw
2861 // an exception if necessary. Eventually we may want to change this so
2862 // that we only grab the lock if the thread was created successfully -
2863 // then we can also do this check and throw the exception in the
2864 // JavaThread constructor.
2865 if (native_thread->osthread() != NULL) {
2866 // Note: the current thread is not being used within "prepare".
2867 native_thread->prepare(jthread);
2868 }
2869 }
2870 }
2871
2872 if (throw_illegal_thread_state) {
2873 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2874 }
2875
2876 assert(native_thread != NULL, "Starting null thread?");
2877
2878 if (native_thread->osthread() == NULL) {
2879 // No one should hold a reference to the 'native_thread'.
2880 native_thread->smr_delete();
2881 if (JvmtiExport::should_post_resource_exhausted()) {
2882 JvmtiExport::post_resource_exhausted(
2883 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2884 os::native_thread_creation_failed_msg());
2885 }
2886 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2887 os::native_thread_creation_failed_msg());
2888 }
2889
2890 #if INCLUDE_JFR
2891 if (JfrRecorder::is_recording() && EventThreadStart::is_enabled() &&
2892 EventThreadStart::is_stacktrace_enabled()) {
2893 JfrThreadLocal* tl = native_thread->jfr_thread_local();
2894 // skip Thread.start() and Thread.start0()
2895 tl->set_cached_stack_trace_id(JfrStackTraceRepository::record(thread, 2));
2896 }
2897 #endif
2898
2899 Thread::start(native_thread);
2900
2901 JVM_END
2902
2903
2904 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2905 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2906 // but is thought to be reliable and simple. In the case, where the receiver is the
2907 // same thread as the sender, no VM_Operation is needed.
2908 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2909 JVMWrapper("JVM_StopThread");
2910
2911 // A nested ThreadsListHandle will grab the Threads_lock so create
2912 // tlh before we resolve throwable.
2913 ThreadsListHandle tlh(thread);
2914 oop java_throwable = JNIHandles::resolve(throwable);
2915 if (java_throwable == NULL) {
2916 THROW(vmSymbols::java_lang_NullPointerException());
2917 }
2918 oop java_thread = NULL;
2919 JavaThread* receiver = NULL;
2920 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2921 Events::log_exception(thread,
2922 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2923 p2i(receiver), p2i(java_thread), p2i(throwable));
2924
2925 if (is_alive) {
2926 // jthread refers to a live JavaThread.
2927 if (thread == receiver) {
2928 // Exception is getting thrown at self so no VM_Operation needed.
2929 THROW_OOP(java_throwable);
2930 } else {
2931 // Use a VM_Operation to throw the exception.
2932 Thread::send_async_exception(java_thread, java_throwable);
2933 }
2934 } else {
2935 // Either:
2936 // - target thread has not been started before being stopped, or
2937 // - target thread already terminated
2938 // We could read the threadStatus to determine which case it is
2939 // but that is overkill as it doesn't matter. We must set the
2940 // stillborn flag for the first case, and if the thread has already
2941 // exited setting this flag has no effect.
2942 java_lang_Thread::set_stillborn(java_thread);
2943 }
2944 JVM_END
2945
2946
2947 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2948 JVMWrapper("JVM_IsThreadAlive");
2949
2950 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2951 return java_lang_Thread::is_alive(thread_oop);
2952 JVM_END
2953
2954
2955 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2956 JVMWrapper("JVM_SuspendThread");
2957
2958 ThreadsListHandle tlh(thread);
2959 JavaThread* receiver = NULL;
2960 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2961 if (is_alive) {
2962 // jthread refers to a live JavaThread.
2963 {
2964 MutexLocker ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2965 if (receiver->is_external_suspend()) {
2966 // Don't allow nested external suspend requests. We can't return
2967 // an error from this interface so just ignore the problem.
2968 return;
2969 }
2970 if (receiver->is_exiting()) { // thread is in the process of exiting
2971 return;
2972 }
2973 receiver->set_external_suspend();
2974 }
2975
2976 // java_suspend() will catch threads in the process of exiting
2977 // and will ignore them.
2978 receiver->java_suspend();
2979
2980 // It would be nice to have the following assertion in all the
2981 // time, but it is possible for a racing resume request to have
2982 // resumed this thread right after we suspended it. Temporarily
2983 // enable this assertion if you are chasing a different kind of
2984 // bug.
2985 //
2986 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2987 // receiver->is_being_ext_suspended(), "thread is not suspended");
2988 }
2989 JVM_END
2990
2991
2992 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2993 JVMWrapper("JVM_ResumeThread");
2994
2995 ThreadsListHandle tlh(thread);
2996 JavaThread* receiver = NULL;
2997 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2998 if (is_alive) {
2999 // jthread refers to a live JavaThread.
3000
3001 // This is the original comment for this Threads_lock grab:
3002 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3003 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3004 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3005 // looks at it.
3006 //
3007 // The above comment dates back to when we had both internal and
3008 // external suspend APIs that shared a common underlying mechanism.
3009 // External suspend is now entirely cooperative and doesn't share
3010 // anything with internal suspend. That said, there are some
3011 // assumptions in the VM that an external resume grabs the
3012 // Threads_lock. We can't drop the Threads_lock grab here until we
3013 // resolve the assumptions that exist elsewhere.
3014 //
3015 MutexLocker ml(Threads_lock);
3016 receiver->java_resume();
3017 }
3018 JVM_END
3019
3020
3021 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3022 JVMWrapper("JVM_SetThreadPriority");
3023
3024 ThreadsListHandle tlh(thread);
3025 oop java_thread = NULL;
3026 JavaThread* receiver = NULL;
3027 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
3028 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3029
3030 if (is_alive) {
3031 // jthread refers to a live JavaThread.
3032 Thread::set_priority(receiver, (ThreadPriority)prio);
3033 }
3034 // Implied else: If the JavaThread hasn't started yet, then the
3035 // priority set in the java.lang.Thread object above will be pushed
3036 // down when it does start.
3037 JVM_END
3038
3039
3040 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3041 JVMWrapper("JVM_Yield");
3042 if (os::dont_yield()) return;
3043 HOTSPOT_THREAD_YIELD();
3044 os::naked_yield();
3045 JVM_END
3046
3047 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
3048 assert(event != NULL, "invariant");
3049 assert(event->should_commit(), "invariant");
3050 event->set_time(millis);
3051 event->commit();
3052 }
3053
3054 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3055 JVMWrapper("JVM_Sleep");
3056
3057 if (millis < 0) {
3058 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3059 }
3060
3061 if (thread->is_interrupted(true) && !HAS_PENDING_EXCEPTION) {
3062 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3063 }
3064
3065 // Save current thread state and restore it at the end of this block.
3066 // And set new thread state to SLEEPING.
3067 JavaThreadSleepState jtss(thread);
3068
3069 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
3070 EventThreadSleep event;
3071
3072 if (millis == 0) {
3073 os::naked_yield();
3074 } else {
3075 ThreadState old_state = thread->osthread()->get_state();
3076 thread->osthread()->set_state(SLEEPING);
3077 if (!thread->sleep(millis)) { // interrupted
3078 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3079 // us while we were sleeping. We do not overwrite those.
3080 if (!HAS_PENDING_EXCEPTION) {
3081 if (event.should_commit()) {
3082 post_thread_sleep_event(&event, millis);
3083 }
3084 HOTSPOT_THREAD_SLEEP_END(1);
3085
3086 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3087 // to properly restore the thread state. That's likely wrong.
3088 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3089 }
3090 }
3091 thread->osthread()->set_state(old_state);
3092 }
3093 if (event.should_commit()) {
3094 post_thread_sleep_event(&event, millis);
3095 }
3096 HOTSPOT_THREAD_SLEEP_END(0);
3097 JVM_END
3098
3099 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3100 JVMWrapper("JVM_CurrentThread");
3101 oop jthread = thread->threadObj();
3102 assert (thread != NULL, "no current thread!");
3103 return JNIHandles::make_local(env, jthread);
3104 JVM_END
3105
3106 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3107 JVMWrapper("JVM_Interrupt");
3108
3109 ThreadsListHandle tlh(thread);
3110 JavaThread* receiver = NULL;
3111 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3112 if (is_alive) {
3113 // jthread refers to a live JavaThread.
3114 receiver->interrupt();
3115 }
3116 JVM_END
3117
3118
3119 // Return true iff the current thread has locked the object passed in
3120
3121 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3122 JVMWrapper("JVM_HoldsLock");
3123 assert(THREAD->is_Java_thread(), "sanity check");
3124 if (obj == NULL) {
3125 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3126 }
3127 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3128 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3129 JVM_END
3130
3131
3132 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3133 JVMWrapper("JVM_DumpAllStacks");
3134 VM_PrintThreads op;
3135 VMThread::execute(&op);
3136 if (JvmtiExport::should_post_data_dump()) {
3137 JvmtiExport::post_data_dump();
3138 }
3139 JVM_END
3140
3141 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3142 JVMWrapper("JVM_SetNativeThreadName");
3143
3144 // We don't use a ThreadsListHandle here because the current thread
3145 // must be alive.
3146 oop java_thread = JNIHandles::resolve_non_null(jthread);
3147 JavaThread* thr = java_lang_Thread::thread(java_thread);
3148 if (thread == thr && !thr->has_attached_via_jni()) {
3149 // Thread naming is only supported for the current thread and
3150 // we don't set the name of an attached thread to avoid stepping
3151 // on other programs.
3152 ResourceMark rm(thread);
3153 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3154 os::set_native_thread_name(thread_name);
3155 }
3156 JVM_END
3157
3158 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3159
3160 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3161 JVMWrapper("JVM_GetClassContext");
3162 ResourceMark rm(THREAD);
3163 JvmtiVMObjectAllocEventCollector oam;
3164 vframeStream vfst(thread);
3165
3166 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3167 // This must only be called from SecurityManager.getClassContext
3168 Method* m = vfst.method();
3169 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3170 m->name() == vmSymbols::getClassContext_name() &&
3171 m->signature() == vmSymbols::void_class_array_signature())) {
3172 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3173 }
3174 }
3175
3176 // Collect method holders
3177 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3178 for (; !vfst.at_end(); vfst.security_next()) {
3179 Method* m = vfst.method();
3180 // Native frames are not returned
3181 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3182 Klass* holder = m->method_holder();
3183 assert(holder->is_klass(), "just checking");
3184 klass_array->append(holder);
3185 }
3186 }
3187
3188 // Create result array of type [Ljava/lang/Class;
3189 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3190 // Fill in mirrors corresponding to method holders
3191 for (int i = 0; i < klass_array->length(); i++) {
3192 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3193 }
3194
3195 return (jobjectArray) JNIHandles::make_local(env, result);
3196 JVM_END
3197
3198
3199 // java.lang.Package ////////////////////////////////////////////////////////////////
3200
3201
3202 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3203 JVMWrapper("JVM_GetSystemPackage");
3204 ResourceMark rm(THREAD);
3205 JvmtiVMObjectAllocEventCollector oam;
3206 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3207 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3208 return (jstring) JNIHandles::make_local(result);
3209 JVM_END
3210
3211
3212 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3213 JVMWrapper("JVM_GetSystemPackages");
3214 JvmtiVMObjectAllocEventCollector oam;
3215 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3216 return (jobjectArray) JNIHandles::make_local(result);
3217 JVM_END
3218
3219
3220 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3221
3222
3223 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3224 JVMWrapper("JVM_GetAndClearReferencePendingList");
3225
3226 MonitorLocker ml(Heap_lock);
3227 oop ref = Universe::reference_pending_list();
3228 if (ref != NULL) {
3229 Universe::set_reference_pending_list(NULL);
3230 }
3231 return JNIHandles::make_local(env, ref);
3232 JVM_END
3233
3234 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3235 JVMWrapper("JVM_HasReferencePendingList");
3236 MonitorLocker ml(Heap_lock);
3237 return Universe::has_reference_pending_list();
3238 JVM_END
3239
3240 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3241 JVMWrapper("JVM_WaitForReferencePendingList");
3242 MonitorLocker ml(Heap_lock);
3243 while (!Universe::has_reference_pending_list()) {
3244 ml.wait();
3245 }
3246 JVM_END
3247
3248
3249 // ObjectInputStream ///////////////////////////////////////////////////////////////
3250
3251 // Return the first user-defined class loader up the execution stack, or null
3252 // if only code from the bootstrap or platform class loader is on the stack.
3253
3254 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3255 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3256 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3257 oop loader = vfst.method()->method_holder()->class_loader();
3258 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3259 return JNIHandles::make_local(env, loader);
3260 }
3261 }
3262 return NULL;
3263 JVM_END
3264
3265
3266 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3267
3268
3269 // resolve array handle and check arguments
3270 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3271 if (arr == NULL) {
3272 THROW_0(vmSymbols::java_lang_NullPointerException());
3273 }
3274 oop a = JNIHandles::resolve_non_null(arr);
3275 if (!a->is_array()) {
3276 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3277 } else if (type_array_only && !a->is_typeArray()) {
3278 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3279 }
3280 return arrayOop(a);
3281 }
3282
3283
3284 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3285 JVMWrapper("JVM_GetArrayLength");
3286 arrayOop a = check_array(env, arr, false, CHECK_0);
3287 return a->length();
3288 JVM_END
3289
3290
3291 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3292 JVMWrapper("JVM_Array_Get");
3293 JvmtiVMObjectAllocEventCollector oam;
3294 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3295 jvalue value;
3296 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3297 oop box = Reflection::box(&value, type, CHECK_NULL);
3298 return JNIHandles::make_local(env, box);
3299 JVM_END
3300
3301
3302 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3303 JVMWrapper("JVM_GetPrimitiveArrayElement");
3304 jvalue value;
3305 value.i = 0; // to initialize value before getting used in CHECK
3306 arrayOop a = check_array(env, arr, true, CHECK_(value));
3307 assert(a->is_typeArray(), "just checking");
3308 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3309 BasicType wide_type = (BasicType) wCode;
3310 if (type != wide_type) {
3311 Reflection::widen(&value, type, wide_type, CHECK_(value));
3312 }
3313 return value;
3314 JVM_END
3315
3316
3317 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3318 JVMWrapper("JVM_SetArrayElement");
3319 arrayOop a = check_array(env, arr, false, CHECK);
3320 oop box = JNIHandles::resolve(val);
3321 jvalue value;
3322 value.i = 0; // to initialize value before getting used in CHECK
3323 BasicType value_type;
3324 if (a->is_objArray()) {
3325 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3326 value_type = Reflection::unbox_for_regular_object(box, &value);
3327 } else {
3328 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3329 }
3330 Reflection::array_set(&value, a, index, value_type, CHECK);
3331 JVM_END
3332
3333
3334 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3335 JVMWrapper("JVM_SetPrimitiveArrayElement");
3336 arrayOop a = check_array(env, arr, true, CHECK);
3337 assert(a->is_typeArray(), "just checking");
3338 BasicType value_type = (BasicType) vCode;
3339 Reflection::array_set(&v, a, index, value_type, CHECK);
3340 JVM_END
3341
3342
3343 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3344 JVMWrapper("JVM_NewArray");
3345 JvmtiVMObjectAllocEventCollector oam;
3346 oop element_mirror = JNIHandles::resolve(eltClass);
3347 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3348 return JNIHandles::make_local(env, result);
3349 JVM_END
3350
3351
3352 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3353 JVMWrapper("JVM_NewMultiArray");
3354 JvmtiVMObjectAllocEventCollector oam;
3355 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3356 oop element_mirror = JNIHandles::resolve(eltClass);
3357 assert(dim_array->is_typeArray(), "just checking");
3358 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3359 return JNIHandles::make_local(env, result);
3360 JVM_END
3361
3362
3363 // Library support ///////////////////////////////////////////////////////////////////////////
3364
3365 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3366 //%note jvm_ct
3367 JVMWrapper("JVM_LoadLibrary");
3368 char ebuf[1024];
3369 void *load_result;
3370 {
3371 ThreadToNativeFromVM ttnfvm(thread);
3372 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3373 }
3374 if (load_result == NULL) {
3375 char msg[1024];
3376 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3377 // Since 'ebuf' may contain a string encoded using
3378 // platform encoding scheme, we need to pass
3379 // Exceptions::unsafe_to_utf8 to the new_exception method
3380 // as the last argument. See bug 6367357.
3381 Handle h_exception =
3382 Exceptions::new_exception(thread,
3383 vmSymbols::java_lang_UnsatisfiedLinkError(),
3384 msg, Exceptions::unsafe_to_utf8);
3385
3386 THROW_HANDLE_0(h_exception);
3387 }
3388 log_info(library)("Loaded library %s, handle " INTPTR_FORMAT, name, p2i(load_result));
3389 return load_result;
3390 JVM_END
3391
3392
3393 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3394 JVMWrapper("JVM_UnloadLibrary");
3395 os::dll_unload(handle);
3396 log_info(library)("Unloaded library with handle " INTPTR_FORMAT, p2i(handle));
3397 JVM_END
3398
3399
3400 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3401 JVMWrapper("JVM_FindLibraryEntry");
3402 void* find_result = os::dll_lookup(handle, name);
3403 log_info(library)("%s %s in library with handle " INTPTR_FORMAT,
3404 find_result != NULL ? "Found" : "Failed to find",
3405 name, p2i(handle));
3406 return find_result;
3407 JVM_END
3408
3409
3410 // JNI version ///////////////////////////////////////////////////////////////////////////////
3411
3412 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3413 JVMWrapper("JVM_IsSupportedJNIVersion");
3414 return Threads::is_supported_jni_version_including_1_1(version);
3415 JVM_END
3416
3417
3418 // String support ///////////////////////////////////////////////////////////////////////////
3419
3420 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3421 JVMWrapper("JVM_InternString");
3422 JvmtiVMObjectAllocEventCollector oam;
3423 if (str == NULL) return NULL;
3424 oop string = JNIHandles::resolve_non_null(str);
3425 oop result = StringTable::intern(string, CHECK_NULL);
3426 return (jstring) JNIHandles::make_local(env, result);
3427 JVM_END
3428
3429
3430 // VM Raw monitor support //////////////////////////////////////////////////////////////////////
3431
3432 // VM Raw monitors (not to be confused with JvmtiRawMonitors) are a simple mutual exclusion
3433 // lock (not actually monitors: no wait/notify) that is exported by the VM for use by JDK
3434 // library code. They may be used by JavaThreads and non-JavaThreads and do not participate
3435 // in the safepoint protocol, thread suspension, thread interruption, or anything of that
3436 // nature. JavaThreads will be "in native" when using this API from JDK code.
3437
3438
3439 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3440 VM_Exit::block_if_vm_exited();
3441 JVMWrapper("JVM_RawMonitorCreate");
3442 return new os::PlatformMutex();
3443 }
3444
3445
3446 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3447 VM_Exit::block_if_vm_exited();
3448 JVMWrapper("JVM_RawMonitorDestroy");
3449 delete ((os::PlatformMutex*) mon);
3450 }
3451
3452
3453 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3454 VM_Exit::block_if_vm_exited();
3455 JVMWrapper("JVM_RawMonitorEnter");
3456 ((os::PlatformMutex*) mon)->lock();
3457 return 0;
3458 }
3459
3460
3461 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3462 VM_Exit::block_if_vm_exited();
3463 JVMWrapper("JVM_RawMonitorExit");
3464 ((os::PlatformMutex*) mon)->unlock();
3465 }
3466
3467
3468 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3469
3470 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3471 Handle loader, Handle protection_domain,
3472 jboolean throwError, TRAPS) {
3473 // Security Note:
3474 // The Java level wrapper will perform the necessary security check allowing
3475 // us to pass the NULL as the initiating class loader. The VM is responsible for
3476 // the checkPackageAccess relative to the initiating class loader via the
3477 // protection_domain. The protection_domain is passed as NULL by the java code
3478 // if there is no security manager in 3-arg Class.forName().
3479 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3480
3481 // Check if we should initialize the class
3482 if (init && klass->is_instance_klass()) {
3483 klass->initialize(CHECK_NULL);
3484 }
3485 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3486 }
3487
3488
3489 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3490
3491 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3492 JVMWrapper("JVM_InvokeMethod");
3493 Handle method_handle;
3494 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3495 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3496 Handle receiver(THREAD, JNIHandles::resolve(obj));
3497 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3498 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3499 jobject res = JNIHandles::make_local(env, result);
3500 if (JvmtiExport::should_post_vm_object_alloc()) {
3501 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3502 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3503 if (java_lang_Class::is_primitive(ret_type)) {
3504 // Only for primitive type vm allocates memory for java object.
3505 // See box() method.
3506 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3507 }
3508 }
3509 return res;
3510 } else {
3511 THROW_0(vmSymbols::java_lang_StackOverflowError());
3512 }
3513 JVM_END
3514
3515
3516 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3517 JVMWrapper("JVM_NewInstanceFromConstructor");
3518 oop constructor_mirror = JNIHandles::resolve(c);
3519 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3520 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3521 jobject res = JNIHandles::make_local(env, result);
3522 if (JvmtiExport::should_post_vm_object_alloc()) {
3523 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3524 }
3525 return res;
3526 JVM_END
3527
3528 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3529
3530 JVM_LEAF(jboolean, JVM_SupportsCX8())
3531 JVMWrapper("JVM_SupportsCX8");
3532 return VM_Version::supports_cx8();
3533 JVM_END
3534
3535 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3536 JVMWrapper("JVM_InitializeFromArchive");
3537 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3538 assert(k->is_klass(), "just checking");
3539 HeapShared::initialize_from_archived_subgraph(k);
3540 JVM_END
3541
3542 // Returns an array of all live Thread objects (VM internal JavaThreads,
3543 // jvmti agent threads, and JNI attaching threads are skipped)
3544 // See CR 6404306 regarding JNI attaching threads
3545 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3546 ResourceMark rm(THREAD);
3547 ThreadsListEnumerator tle(THREAD, false, false);
3548 JvmtiVMObjectAllocEventCollector oam;
3549
3550 int num_threads = tle.num_threads();
3551 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3552 objArrayHandle threads_ah(THREAD, r);
3553
3554 for (int i = 0; i < num_threads; i++) {
3555 Handle h = tle.get_threadObj(i);
3556 threads_ah->obj_at_put(i, h());
3557 }
3558
3559 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3560 JVM_END
3561
3562
3563 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3564 // Return StackTraceElement[][], each element is the stack trace of a thread in
3565 // the corresponding entry in the given threads array
3566 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3567 JVMWrapper("JVM_DumpThreads");
3568 JvmtiVMObjectAllocEventCollector oam;
3569
3570 // Check if threads is null
3571 if (threads == NULL) {
3572 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3573 }
3574
3575 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3576 objArrayHandle ah(THREAD, a);
3577 int num_threads = ah->length();
3578 // check if threads is non-empty array
3579 if (num_threads == 0) {
3580 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3581 }
3582
3583 // check if threads is not an array of objects of Thread class
3584 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3585 if (k != SystemDictionary::Thread_klass()) {
3586 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3587 }
3588
3589 ResourceMark rm(THREAD);
3590
3591 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3592 for (int i = 0; i < num_threads; i++) {
3593 oop thread_obj = ah->obj_at(i);
3594 instanceHandle h(THREAD, (instanceOop) thread_obj);
3595 thread_handle_array->append(h);
3596 }
3597
3598 // The JavaThread references in thread_handle_array are validated
3599 // in VM_ThreadDump::doit().
3600 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3601 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3602
3603 JVM_END
3604
3605 // JVM monitoring and management support
3606 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3607 return Management::get_jmm_interface(version);
3608 JVM_END
3609
3610 // com.sun.tools.attach.VirtualMachine agent properties support
3611 //
3612 // Initialize the agent properties with the properties maintained in the VM
3613 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3614 JVMWrapper("JVM_InitAgentProperties");
3615 ResourceMark rm;
3616
3617 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3618
3619 PUTPROP(props, "sun.java.command", Arguments::java_command());
3620 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3621 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3622 return properties;
3623 JVM_END
3624
3625 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3626 {
3627 JVMWrapper("JVM_GetEnclosingMethodInfo");
3628 JvmtiVMObjectAllocEventCollector oam;
3629
3630 if (ofClass == NULL) {
3631 return NULL;
3632 }
3633 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3634 // Special handling for primitive objects
3635 if (java_lang_Class::is_primitive(mirror())) {
3636 return NULL;
3637 }
3638 Klass* k = java_lang_Class::as_Klass(mirror());
3639 if (!k->is_instance_klass()) {
3640 return NULL;
3641 }
3642 InstanceKlass* ik = InstanceKlass::cast(k);
3643 int encl_method_class_idx = ik->enclosing_method_class_index();
3644 if (encl_method_class_idx == 0) {
3645 return NULL;
3646 }
3647 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3648 objArrayHandle dest(THREAD, dest_o);
3649 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3650 dest->obj_at_put(0, enc_k->java_mirror());
3651 int encl_method_method_idx = ik->enclosing_method_method_index();
3652 if (encl_method_method_idx != 0) {
3653 Symbol* sym = ik->constants()->symbol_at(
3654 extract_low_short_from_int(
3655 ik->constants()->name_and_type_at(encl_method_method_idx)));
3656 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3657 dest->obj_at_put(1, str());
3658 sym = ik->constants()->symbol_at(
3659 extract_high_short_from_int(
3660 ik->constants()->name_and_type_at(encl_method_method_idx)));
3661 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3662 dest->obj_at_put(2, str());
3663 }
3664 return (jobjectArray) JNIHandles::make_local(dest());
3665 }
3666 JVM_END
3667
3668 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3669 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3670 ResourceMark rm(THREAD);
3671
3672 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3673 return NULL;
3674 }
3675
3676 char** vm_flags = Arguments::jvm_flags_array();
3677 char** vm_args = Arguments::jvm_args_array();
3678 int num_flags = Arguments::num_jvm_flags();
3679 int num_args = Arguments::num_jvm_args();
3680
3681 InstanceKlass* ik = SystemDictionary::String_klass();
3682 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3683 objArrayHandle result_h(THREAD, r);
3684
3685 int index = 0;
3686 for (int j = 0; j < num_flags; j++, index++) {
3687 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3688 result_h->obj_at_put(index, h());
3689 }
3690 for (int i = 0; i < num_args; i++, index++) {
3691 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3692 result_h->obj_at_put(index, h());
3693 }
3694 return (jobjectArray) JNIHandles::make_local(env, result_h());
3695 JVM_END
3696
3697 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3698 return os::get_signal_number(name);
3699 JVM_END