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