1 /*
2 * Copyright (c) 1997, 2015, 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 "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc/shared/barrierSet.inline.hpp"
33 #include "gc/shared/collectedHeap.inline.hpp"
34 #include "interpreter/bytecode.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/method.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/jvm.h"
44 #include "prims/jvm_misc.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/jvmtiThreadState.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "prims/privilegedStack.hpp"
49 #include "prims/stackwalk.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/atomic.inline.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/jfieldIDWorkaround.hpp"
58 #include "runtime/orderAccess.inline.hpp"
59 #include "runtime/os.inline.hpp"
60 #include "runtime/perfData.hpp"
61 #include "runtime/reflection.hpp"
62 #include "runtime/thread.inline.hpp"
63 #include "runtime/vframe.hpp"
64 #include "runtime/vm_operations.hpp"
65 #include "runtime/vm_version.hpp"
66 #include "services/attachListener.hpp"
67 #include "services/management.hpp"
68 #include "services/threadService.hpp"
69 #include "trace/tracing.hpp"
70 #include "utilities/copy.hpp"
71 #include "utilities/defaultStream.hpp"
72 #include "utilities/dtrace.hpp"
73 #include "utilities/events.hpp"
74 #include "utilities/histogram.hpp"
75 #include "utilities/macros.hpp"
76 #include "utilities/top.hpp"
77 #include "utilities/utf8.hpp"
78 #if INCLUDE_CDS
79 #include "classfile/sharedClassUtil.hpp"
80 #include "classfile/systemDictionaryShared.hpp"
81 #endif
82 #ifdef TARGET_OS_FAMILY_linux
83 # include "jvm_linux.h"
84 #endif
85 #ifdef TARGET_OS_FAMILY_solaris
86 # include "jvm_solaris.h"
87 #endif
88 #ifdef TARGET_OS_FAMILY_windows
89 # include "jvm_windows.h"
90 #endif
91 #ifdef TARGET_OS_FAMILY_aix
92 # include "jvm_aix.h"
93 #endif
94 #ifdef TARGET_OS_FAMILY_bsd
95 # include "jvm_bsd.h"
96 #endif
97
98 #include <errno.h>
99
100 /*
101 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
102 such ctors and calls MUST NOT come between an oop declaration/init and its
103 usage because if objects are move this may cause various memory stomps, bus
104 errors and segfaults. Here is a cookbook for causing so called "naked oop
105 failures":
106
107 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
108 JVMWrapper("JVM_GetClassDeclaredFields");
109
110 // Object address to be held directly in mirror & not visible to GC
111 oop mirror = JNIHandles::resolve_non_null(ofClass);
112
113 // If this ctor can hit a safepoint, moving objects around, then
114 ComplexConstructor foo;
115
116 // Boom! mirror may point to JUNK instead of the intended object
117 (some dereference of mirror)
118
119 // Here's another call that may block for GC, making mirror stale
120 MutexLocker ml(some_lock);
121
122 // And here's an initializer that can result in a stale oop
123 // all in one step.
124 oop o = call_that_can_throw_exception(TRAPS);
125
126
127 The solution is to keep the oop declaration BELOW the ctor or function
128 call that might cause a GC, do another resolve to reassign the oop, or
129 consider use of a Handle instead of an oop so there is immunity from object
130 motion. But note that the "QUICK" entries below do not have a handlemark
131 and thus can only support use of handles passed in.
132 */
133
134 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
135 ResourceMark rm;
136 int line_number = -1;
137 const char * source_file = NULL;
138 const char * trace = "explicit";
139 InstanceKlass* caller = NULL;
140 JavaThread* jthread = JavaThread::current();
141 if (jthread->has_last_Java_frame()) {
142 vframeStream vfst(jthread);
143
144 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
145 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
146 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
147 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
148 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
149
150 Method* last_caller = NULL;
151
152 while (!vfst.at_end()) {
153 Method* m = vfst.method();
154 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
155 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
156 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
157 break;
158 }
159 last_caller = m;
160 vfst.next();
161 }
162 // if this is called from Class.forName0 and that is called from Class.forName,
163 // then print the caller of Class.forName. If this is Class.loadClass, then print
164 // that caller, otherwise keep quiet since this should be picked up elsewhere.
165 bool found_it = false;
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName0_name()) {
169 vfst.next();
170 if (!vfst.at_end() &&
171 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
172 vfst.method()->name() == vmSymbols::forName_name()) {
173 vfst.next();
174 found_it = true;
175 }
176 } else if (last_caller != NULL &&
177 last_caller->method_holder()->name() ==
178 vmSymbols::java_lang_ClassLoader() &&
179 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
180 last_caller->name() == vmSymbols::loadClass_name())) {
181 found_it = true;
182 } else if (!vfst.at_end()) {
183 if (vfst.method()->is_native()) {
184 // JNI call
185 found_it = true;
186 }
187 }
188 if (found_it && !vfst.at_end()) {
189 // found the caller
190 caller = vfst.method()->method_holder();
191 line_number = vfst.method()->line_number_from_bci(vfst.bci());
192 if (line_number == -1) {
193 // show method name if it's a native method
194 trace = vfst.method()->name_and_sig_as_C_string();
195 }
196 Symbol* s = caller->source_file_name();
197 if (s != NULL) {
198 source_file = s->as_C_string();
199 }
200 }
201 }
202 if (caller != NULL) {
203 if (to_class != caller) {
204 const char * from = caller->external_name();
205 const char * to = to_class->external_name();
206 // print in a single call to reduce interleaving between threads
207 if (source_file != NULL) {
208 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
209 } else {
210 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
211 }
212 }
213 }
214 }
215
216 void trace_class_resolution(Klass* to_class) {
217 EXCEPTION_MARK;
218 trace_class_resolution_impl(to_class, THREAD);
219 if (HAS_PENDING_EXCEPTION) {
220 CLEAR_PENDING_EXCEPTION;
221 }
222 }
223
224 // Wrapper to trace JVM functions
225
226 #ifdef ASSERT
227 Histogram* JVMHistogram;
228 volatile jint JVMHistogram_lock = 0;
229
230 class JVMHistogramElement : public HistogramElement {
231 public:
232 JVMHistogramElement(const char* name);
233 };
234
235 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
236 _name = elementName;
237 uintx count = 0;
238
239 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
240 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
241 count +=1;
242 if ( (WarnOnStalledSpinLock > 0)
243 && (count % WarnOnStalledSpinLock == 0)) {
244 warning("JVMHistogram_lock seems to be stalled");
245 }
246 }
247 }
248
249 if(JVMHistogram == NULL)
250 JVMHistogram = new Histogram("JVM Call Counts",100);
251
252 JVMHistogram->add_element(this);
253 Atomic::dec(&JVMHistogram_lock);
254 }
255
256 #define JVMCountWrapper(arg) \
257 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
258 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
259
260 #define JVMWrapper(arg) JVMCountWrapper(arg);
261 #else
262 #define JVMWrapper(arg)
263 #endif
264
265
266 // Interface version /////////////////////////////////////////////////////////////////////
267
268
269 JVM_LEAF(jint, JVM_GetInterfaceVersion())
270 return JVM_INTERFACE_VERSION;
271 JVM_END
272
273
274 // java.lang.System //////////////////////////////////////////////////////////////////////
275
276
277 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
278 JVMWrapper("JVM_CurrentTimeMillis");
279 return os::javaTimeMillis();
280 JVM_END
281
282 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
283 JVMWrapper("JVM_NanoTime");
284 return os::javaTimeNanos();
285 JVM_END
286
287 // The function below is actually exposed by sun.misc.VM and not
288 // java.lang.System, but we choose to keep it here so that it stays next
289 // to JVM_CurrentTimeMillis and JVM_NanoTime
290
291 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
292 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
293
294 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
295 JVMWrapper("JVM_GetNanoTimeAdjustment");
296 jlong seconds;
297 jlong nanos;
298
299 os::javaTimeSystemUTC(seconds, nanos);
300
301 // We're going to verify that the result can fit in a long.
302 // For that we need the difference in seconds between 'seconds'
303 // and 'offset_secs' to be such that:
304 // |seconds - offset_secs| < (2^63/10^9)
305 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
306 // which makes |seconds - offset_secs| < 2^33
307 // and we will prefer +/- 2^32 as the maximum acceptable diff
308 // as 2^32 has a more natural feel than 2^33...
309 //
310 // So if |seconds - offset_secs| >= 2^32 - we return a special
311 // sentinel value (-1) which the caller should take as an
312 // exception value indicating that the offset given to us is
313 // too far from range of the current time - leading to too big
314 // a nano adjustment. The caller is expected to recover by
315 // computing a more accurate offset and calling this method
316 // again. (For the record 2^32 secs is ~136 years, so that
317 // should rarely happen)
318 //
319 jlong diff = seconds - offset_secs;
320 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
321 return -1; // sentinel value: the offset is too far off the target
322 }
323
324 // return the adjustment. If you compute a time by adding
325 // this number of nanoseconds along with the number of seconds
326 // in the offset you should get the current UTC time.
327 return (diff * (jlong)1000000000) + nanos;
328 JVM_END
329
330 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
331 jobject dst, jint dst_pos, jint length))
332 JVMWrapper("JVM_ArrayCopy");
333 // Check if we have null pointers
334 if (src == NULL || dst == NULL) {
335 THROW(vmSymbols::java_lang_NullPointerException());
336 }
337 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
338 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
339 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
340 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
341 // Do copy
342 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
343 JVM_END
344
345
346 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
347 JavaValue r(T_OBJECT);
348 // public synchronized Object put(Object key, Object value);
349 HandleMark hm(THREAD);
350 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
351 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
352 JavaCalls::call_virtual(&r,
353 props,
354 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
355 vmSymbols::put_name(),
356 vmSymbols::object_object_object_signature(),
357 key_str,
358 value_str,
359 THREAD);
360 }
361
362
363 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
364
365
366 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
367 JVMWrapper("JVM_InitProperties");
368 ResourceMark rm;
369
370 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
371
372 // System property list includes both user set via -D option and
373 // jvm system specific properties.
374 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
375 PUTPROP(props, p->key(), p->value());
376 }
377
378 // Convert the -XX:MaxDirectMemorySize= command line flag
379 // to the sun.nio.MaxDirectMemorySize property.
380 // Do this after setting user properties to prevent people
381 // from setting the value with a -D option, as requested.
382 {
383 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
384 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
385 } else {
386 char as_chars[256];
387 jio_snprintf(as_chars, sizeof(as_chars), SIZE_FORMAT, MaxDirectMemorySize);
388 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
389 }
390 }
391
392 // JVM monitoring and management support
393 // Add the sun.management.compiler property for the compiler's name
394 {
395 #undef CSIZE
396 #if defined(_LP64) || defined(_WIN64)
397 #define CSIZE "64-Bit "
398 #else
399 #define CSIZE
400 #endif // 64bit
401
402 #ifdef TIERED
403 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
404 #else
405 #if defined(COMPILER1)
406 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
407 #elif defined(COMPILER2)
408 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
409 #elif INCLUDE_JVMCI
410 #error "INCLUDE_JVMCI should imply TIERED"
411 #else
412 const char* compiler_name = "";
413 #endif // compilers
414 #endif // TIERED
415
416 if (*compiler_name != '\0' &&
417 (Arguments::mode() != Arguments::_int)) {
418 PUTPROP(props, "sun.management.compiler", compiler_name);
419 }
420 }
421
422 return properties;
423 JVM_END
424
425
426 /*
427 * Return the temporary directory that the VM uses for the attach
428 * and perf data files.
429 *
430 * It is important that this directory is well-known and the
431 * same for all VM instances. It cannot be affected by configuration
432 * variables such as java.io.tmpdir.
433 */
434 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
435 JVMWrapper("JVM_GetTemporaryDirectory");
436 HandleMark hm(THREAD);
437 const char* temp_dir = os::get_temp_directory();
438 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
439 return (jstring) JNIHandles::make_local(env, h());
440 JVM_END
441
442
443 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
444
445 extern volatile jint vm_created;
446
447 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
448 before_exit(thread);
449 vm_exit(code);
450 JVM_END
451
452
453 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
454 JVMWrapper("JVM_GC");
455 if (!DisableExplicitGC) {
456 Universe::heap()->collect(GCCause::_java_lang_system_gc);
457 }
458 JVM_END
459
460
461 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
462 JVMWrapper("JVM_MaxObjectInspectionAge");
463 return Universe::heap()->millis_since_last_gc();
464 JVM_END
465
466
467 static inline jlong convert_size_t_to_jlong(size_t val) {
468 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
469 NOT_LP64 (return (jlong)val;)
470 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
471 }
472
473 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
474 JVMWrapper("JVM_TotalMemory");
475 size_t n = Universe::heap()->capacity();
476 return convert_size_t_to_jlong(n);
477 JVM_END
478
479
480 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
481 JVMWrapper("JVM_FreeMemory");
482 CollectedHeap* ch = Universe::heap();
483 size_t n;
484 {
485 MutexLocker x(Heap_lock);
486 n = ch->capacity() - ch->used();
487 }
488 return convert_size_t_to_jlong(n);
489 JVM_END
490
491
492 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
493 JVMWrapper("JVM_MaxMemory");
494 size_t n = Universe::heap()->max_capacity();
495 return convert_size_t_to_jlong(n);
496 JVM_END
497
498
499 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
500 JVMWrapper("JVM_ActiveProcessorCount");
501 return os::active_processor_count();
502 JVM_END
503
504
505
506 // java.lang.Throwable //////////////////////////////////////////////////////
507
508
509 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
510 JVMWrapper("JVM_FillInStackTrace");
511 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
512 java_lang_Throwable::fill_in_stack_trace(exception);
513 JVM_END
514
515
516 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
517 JVMWrapper("JVM_GetStackTraceDepth");
518 oop exception = JNIHandles::resolve(throwable);
519 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
520 JVM_END
521
522
523 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
524 JVMWrapper("JVM_GetStackTraceElement");
525 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
526 oop exception = JNIHandles::resolve(throwable);
527 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
528 return JNIHandles::make_local(env, element);
529 JVM_END
530
531
532 // java.lang.StackWalker //////////////////////////////////////////////////////
533
534
535 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
536 jint skip_frames, jint frame_count, jint start_index,
537 jobjectArray classes,
538 jobjectArray frames))
539 JVMWrapper("JVM_CallStackWalk");
540 JavaThread* jt = (JavaThread*) THREAD;
541 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
542 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
543 }
544
545 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
546 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(classes));
547 objArrayHandle classes_array_h(THREAD, ca);
548
549 // frames array is null when only getting caller reference
550 objArrayOop fa = objArrayOop(JNIHandles::resolve(frames));
551 objArrayHandle frames_array_h(THREAD, fa);
552
553 int limit = start_index + frame_count;
554 if (classes_array_h->length() < limit) {
555 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
556 }
557
558 Handle result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
559 start_index, classes_array_h,
560 frames_array_h, CHECK_NULL);
561 return JNIHandles::make_local(env, result());
562 JVM_END
563
564
565 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
566 jint frame_count, jint start_index,
567 jobjectArray classes,
568 jobjectArray frames))
569 JVMWrapper("JVM_MoreStackWalk");
570 JavaThread* jt = (JavaThread*) THREAD;
571 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(classes));
572 objArrayHandle classes_array_h(THREAD, ca);
573
574 // frames array is null when only getting caller reference
575 objArrayOop fa = objArrayOop(JNIHandles::resolve(frames));
576 objArrayHandle frames_array_h(THREAD, fa);
577
578 int limit = start_index+frame_count;
579 if (classes_array_h->length() < limit) {
580 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
581 }
582
583 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
584 return StackWalk::moreFrames(stackStream_h, mode, anchor, frame_count,
585 start_index, classes_array_h,
586 frames_array_h, THREAD);
587 JVM_END
588
589 JVM_ENTRY(void, JVM_FillStackFrames(JNIEnv *env, jclass stackStream,
590 jint start_index,
591 jobjectArray frames,
592 jint from_index, jint to_index))
593 JVMWrapper("JVM_FillStackFrames");
594 if (TraceStackWalk) {
595 tty->print("JVM_FillStackFrames() start_index=%d from_index=%d to_index=%d\n",
596 start_index, from_index, to_index);
597 }
598
599 JavaThread* jt = (JavaThread*) THREAD;
600
601 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
602 objArrayHandle frames_array_h(THREAD, fa);
603
604 if (frames_array_h->length() < to_index) {
605 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array length not matched");
606 }
607
608 for (int i = from_index; i < to_index; i++) {
609 Handle stackFrame(THREAD, frames_array_h->obj_at(i));
610 java_lang_StackFrameInfo::fill_methodInfo(stackFrame, CHECK);
611 }
612 JVM_END
613
614 JVM_ENTRY(void, JVM_SetMethodInfo(JNIEnv *env, jobject frame))
615 JVMWrapper("JVM_SetMethodInfo");
616 Handle stackFrame(THREAD, JNIHandles::resolve(frame));
617 java_lang_StackFrameInfo::fill_methodInfo(stackFrame, THREAD);
618 JVM_END
619
620 // java.lang.Object ///////////////////////////////////////////////
621
622
623 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
624 JVMWrapper("JVM_IHashCode");
625 // as implemented in the classic virtual machine; return 0 if object is NULL
626 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
627 JVM_END
628
629
630 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
631 JVMWrapper("JVM_MonitorWait");
632 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
633 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
634 if (JvmtiExport::should_post_monitor_wait()) {
635 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
636
637 // The current thread already owns the monitor and it has not yet
638 // been added to the wait queue so the current thread cannot be
639 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
640 // event handler cannot accidentally consume an unpark() meant for
641 // the ParkEvent associated with this ObjectMonitor.
642 }
643 ObjectSynchronizer::wait(obj, ms, CHECK);
644 JVM_END
645
646
647 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
648 JVMWrapper("JVM_MonitorNotify");
649 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
650 ObjectSynchronizer::notify(obj, CHECK);
651 JVM_END
652
653
654 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
655 JVMWrapper("JVM_MonitorNotifyAll");
656 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
657 ObjectSynchronizer::notifyall(obj, CHECK);
658 JVM_END
659
660
661 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
662 JVMWrapper("JVM_Clone");
663 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
664 const KlassHandle klass (THREAD, obj->klass());
665 JvmtiVMObjectAllocEventCollector oam;
666
667 #ifdef ASSERT
668 // Just checking that the cloneable flag is set correct
669 if (obj->is_array()) {
670 guarantee(klass->is_cloneable(), "all arrays are cloneable");
671 } else {
672 guarantee(obj->is_instance(), "should be instanceOop");
673 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
674 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
675 }
676 #endif
677
678 // Check if class of obj supports the Cloneable interface.
679 // All arrays are considered to be cloneable (See JLS 20.1.5)
680 if (!klass->is_cloneable()) {
681 ResourceMark rm(THREAD);
682 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
683 }
684
685 // Make shallow object copy
686 const int size = obj->size();
687 oop new_obj_oop = NULL;
688 if (obj->is_array()) {
689 const int length = ((arrayOop)obj())->length();
690 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
691 } else {
692 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
693 }
694
695 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
696 // is modifying a reference field in the clonee, a non-oop-atomic copy might
697 // be suspended in the middle of copying the pointer and end up with parts
698 // of two different pointers in the field. Subsequent dereferences will crash.
699 // 4846409: an oop-copy of objects with long or double fields or arrays of same
700 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
701 // of oops. We know objects are aligned on a minimum of an jlong boundary.
702 // The same is true of StubRoutines::object_copy and the various oop_copy
703 // variants, and of the code generated by the inline_native_clone intrinsic.
704 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
705 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
706 (size_t)align_object_size(size) / HeapWordsPerLong);
707 // Clear the header
708 new_obj_oop->init_mark();
709
710 // Store check (mark entire object and let gc sort it out)
711 BarrierSet* bs = Universe::heap()->barrier_set();
712 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
713 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
714
715 Handle new_obj(THREAD, new_obj_oop);
716 // Special handling for MemberNames. Since they contain Method* metadata, they
717 // must be registered so that RedefineClasses can fix metadata contained in them.
718 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
719 java_lang_invoke_MemberName::is_method(new_obj())) {
720 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
721 // MemberName may be unresolved, so doesn't need registration until resolved.
722 if (method != NULL) {
723 methodHandle m(THREAD, method);
724 // This can safepoint and redefine method, so need both new_obj and method
725 // in a handle, for two different reasons. new_obj can move, method can be
726 // deleted if nothing is using it on the stack.
727 m->method_holder()->add_member_name(new_obj());
728 }
729 }
730
731 // Caution: this involves a java upcall, so the clone should be
732 // "gc-robust" by this stage.
733 if (klass->has_finalizer()) {
734 assert(obj->is_instance(), "should be instanceOop");
735 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
736 new_obj = Handle(THREAD, new_obj_oop);
737 }
738
739 return JNIHandles::make_local(env, new_obj());
740 JVM_END
741
742 // java.io.File ///////////////////////////////////////////////////////////////
743
744 JVM_LEAF(char*, JVM_NativePath(char* path))
745 JVMWrapper("JVM_NativePath");
746 return os::native_path(path);
747 JVM_END
748
749
750 // Misc. class handling ///////////////////////////////////////////////////////////
751
752
753 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
754 JVMWrapper("JVM_GetCallerClass");
755
756 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
757 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
758 // temporarily for existing code to use until a replacement API is defined.
759 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
760 Klass* k = thread->security_get_caller_class(depth);
761 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
762 }
763
764 // Getting the class of the caller frame.
765 //
766 // The call stack at this point looks something like this:
767 //
768 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
769 // [1] [ @CallerSensitive API.method ]
770 // [.] [ (skipped intermediate frames) ]
771 // [n] [ caller ]
772 vframeStream vfst(thread);
773 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
774 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
775 Method* m = vfst.method();
776 assert(m != NULL, "sanity");
777 switch (n) {
778 case 0:
779 // This must only be called from Reflection.getCallerClass
780 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
781 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
782 }
783 // fall-through
784 case 1:
785 // Frame 0 and 1 must be caller sensitive.
786 if (!m->caller_sensitive()) {
787 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
788 }
789 break;
790 default:
791 if (!m->is_ignored_by_security_stack_walk()) {
792 // We have reached the desired frame; return the holder class.
793 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
794 }
795 break;
796 }
797 }
798 return NULL;
799 JVM_END
800
801
802 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
803 JVMWrapper("JVM_FindPrimitiveClass");
804 oop mirror = NULL;
805 BasicType t = name2type(utf);
806 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
807 mirror = Universe::java_mirror(t);
808 }
809 if (mirror == NULL) {
810 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
811 } else {
812 return (jclass) JNIHandles::make_local(env, mirror);
813 }
814 JVM_END
815
816
817 // Returns a class loaded by the bootstrap class loader; or null
818 // if not found. ClassNotFoundException is not thrown.
819 // FindClassFromBootLoader is exported to the launcher for windows.
820 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
821 const char* name))
822 JVMWrapper("JVM_FindClassFromBootLoader");
823
824 // Java libraries should ensure that name is never null...
825 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
826 // It's impossible to create this class; the name cannot fit
827 // into the constant pool.
828 return NULL;
829 }
830
831 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
832 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
833 if (k == NULL) {
834 return NULL;
835 }
836
837 if (TraceClassResolution) {
838 trace_class_resolution(k);
839 }
840 return (jclass) JNIHandles::make_local(env, k->java_mirror());
841 JVM_END
842
843 // Find a class with this name in this loader, using the caller's protection domain.
844 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
845 jboolean init, jobject loader,
846 jclass caller))
847 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
848 // Java libraries should ensure that name is never null...
849 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
850 // It's impossible to create this class; the name cannot fit
851 // into the constant pool.
852 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
853 }
854
855 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
856
857 oop loader_oop = JNIHandles::resolve(loader);
858 oop from_class = JNIHandles::resolve(caller);
859 oop protection_domain = NULL;
860 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
861 // NPE. Put it in another way, the bootstrap class loader has all permission and
862 // thus no checkPackageAccess equivalence in the VM class loader.
863 // The caller is also passed as NULL by the java code if there is no security
864 // manager to avoid the performance cost of getting the calling class.
865 if (from_class != NULL && loader_oop != NULL) {
866 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
867 }
868
869 Handle h_loader(THREAD, loader_oop);
870 Handle h_prot(THREAD, protection_domain);
871 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
872 h_prot, false, THREAD);
873
874 if (TraceClassResolution && result != NULL) {
875 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
876 }
877 return result;
878 JVM_END
879
880 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
881 jboolean init, jclass from))
882 JVMWrapper("JVM_FindClassFromClass");
883 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
884 // It's impossible to create this class; the name cannot fit
885 // into the constant pool.
886 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
887 }
888 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
889 oop from_class_oop = JNIHandles::resolve(from);
890 Klass* from_class = (from_class_oop == NULL)
891 ? (Klass*)NULL
892 : java_lang_Class::as_Klass(from_class_oop);
893 oop class_loader = NULL;
894 oop protection_domain = NULL;
895 if (from_class != NULL) {
896 class_loader = from_class->class_loader();
897 protection_domain = from_class->protection_domain();
898 }
899 Handle h_loader(THREAD, class_loader);
900 Handle h_prot (THREAD, protection_domain);
901 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
902 h_prot, true, thread);
903
904 if (TraceClassResolution && result != NULL) {
905 // this function is generally only used for class loading during verification.
906 ResourceMark rm;
907 oop from_mirror = JNIHandles::resolve_non_null(from);
908 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
909 const char * from_name = from_class->external_name();
910
911 oop mirror = JNIHandles::resolve_non_null(result);
912 Klass* to_class = java_lang_Class::as_Klass(mirror);
913 const char * to = to_class->external_name();
914 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
915 }
916
917 return result;
918 JVM_END
919
920 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
921 if (loader.is_null()) {
922 return;
923 }
924
925 // check whether the current caller thread holds the lock or not.
926 // If not, increment the corresponding counter
927 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
928 ObjectSynchronizer::owner_self) {
929 counter->inc();
930 }
931 }
932
933 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
934 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
935 jobject loader, const jbyte *buf,
936 jsize len, jobject pd, const char *source,
937 TRAPS) {
938 if (source == NULL) source = "__JVM_DefineClass__";
939
940 assert(THREAD->is_Java_thread(), "must be a JavaThread");
941 JavaThread* jt = (JavaThread*) THREAD;
942
943 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
944 ClassLoader::perf_define_appclass_selftime(),
945 ClassLoader::perf_define_appclasses(),
946 jt->get_thread_stat()->perf_recursion_counts_addr(),
947 jt->get_thread_stat()->perf_timers_addr(),
948 PerfClassTraceTime::DEFINE_CLASS);
949
950 if (UsePerfData) {
951 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
952 }
953
954 // Since exceptions can be thrown, class initialization can take place
955 // if name is NULL no check for class name in .class stream has to be made.
956 TempNewSymbol class_name = NULL;
957 if (name != NULL) {
958 const int str_len = (int)strlen(name);
959 if (str_len > Symbol::max_length()) {
960 // It's impossible to create this class; the name cannot fit
961 // into the constant pool.
962 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
963 }
964 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
965 }
966
967 ResourceMark rm(THREAD);
968 ClassFileStream st((u1*) buf, len, (char *)source);
969 Handle class_loader (THREAD, JNIHandles::resolve(loader));
970 if (UsePerfData) {
971 is_lock_held_by_thread(class_loader,
972 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
973 THREAD);
974 }
975 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
976 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
977 protection_domain, &st,
978 true, CHECK_NULL);
979
980 if (TraceClassResolution && k != NULL) {
981 trace_class_resolution(k);
982 }
983
984 return (jclass) JNIHandles::make_local(env, k->java_mirror());
985 }
986
987
988 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
989 JVMWrapper("JVM_DefineClass");
990
991 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
992 JVM_END
993
994
995 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
996 JVMWrapper("JVM_DefineClassWithSource");
997
998 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
999 JVM_END
1000
1001 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1002 JVMWrapper("JVM_FindLoadedClass");
1003 ResourceMark rm(THREAD);
1004
1005 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1006 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1007
1008 const char* str = java_lang_String::as_utf8_string(string());
1009 // Sanity check, don't expect null
1010 if (str == NULL) return NULL;
1011
1012 const int str_len = (int)strlen(str);
1013 if (str_len > Symbol::max_length()) {
1014 // It's impossible to create this class; the name cannot fit
1015 // into the constant pool.
1016 return NULL;
1017 }
1018 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1019
1020 // Security Note:
1021 // The Java level wrapper will perform the necessary security check allowing
1022 // us to pass the NULL as the initiating class loader.
1023 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1024 if (UsePerfData) {
1025 is_lock_held_by_thread(h_loader,
1026 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1027 THREAD);
1028 }
1029
1030 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1031 h_loader,
1032 Handle(),
1033 CHECK_NULL);
1034 #if INCLUDE_CDS
1035 if (k == NULL) {
1036 // If the class is not already loaded, try to see if it's in the shared
1037 // archive for the current classloader (h_loader).
1038 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1039 klass_name, h_loader, CHECK_NULL);
1040 k = ik();
1041 }
1042 #endif
1043 return (k == NULL) ? NULL :
1044 (jclass) JNIHandles::make_local(env, k->java_mirror());
1045 JVM_END
1046
1047
1048 // Reflection support //////////////////////////////////////////////////////////////////////////////
1049
1050 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1051 assert (cls != NULL, "illegal class");
1052 JVMWrapper("JVM_GetClassName");
1053 JvmtiVMObjectAllocEventCollector oam;
1054 ResourceMark rm(THREAD);
1055 const char* name;
1056 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1057 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1058 } else {
1059 // Consider caching interned string in Klass
1060 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1061 assert(k->is_klass(), "just checking");
1062 name = k->external_name();
1063 }
1064 oop result = StringTable::intern((char*) name, CHECK_NULL);
1065 return (jstring) JNIHandles::make_local(env, result);
1066 JVM_END
1067
1068
1069 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1070 JVMWrapper("JVM_GetClassInterfaces");
1071 JvmtiVMObjectAllocEventCollector oam;
1072 oop mirror = JNIHandles::resolve_non_null(cls);
1073
1074 // Special handling for primitive objects
1075 if (java_lang_Class::is_primitive(mirror)) {
1076 // Primitive objects does not have any interfaces
1077 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1078 return (jobjectArray) JNIHandles::make_local(env, r);
1079 }
1080
1081 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1082 // Figure size of result array
1083 int size;
1084 if (klass->is_instance_klass()) {
1085 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1086 } else {
1087 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1088 size = 2;
1089 }
1090
1091 // Allocate result array
1092 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1093 objArrayHandle result (THREAD, r);
1094 // Fill in result
1095 if (klass->is_instance_klass()) {
1096 // Regular instance klass, fill in all local interfaces
1097 for (int index = 0; index < size; index++) {
1098 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1099 result->obj_at_put(index, k->java_mirror());
1100 }
1101 } else {
1102 // All arrays implement java.lang.Cloneable and java.io.Serializable
1103 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1104 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1105 }
1106 return (jobjectArray) JNIHandles::make_local(env, result());
1107 JVM_END
1108
1109
1110 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1111 JVMWrapper("JVM_IsInterface");
1112 oop mirror = JNIHandles::resolve_non_null(cls);
1113 if (java_lang_Class::is_primitive(mirror)) {
1114 return JNI_FALSE;
1115 }
1116 Klass* k = java_lang_Class::as_Klass(mirror);
1117 jboolean result = k->is_interface();
1118 assert(!result || k->is_instance_klass(),
1119 "all interfaces are instance types");
1120 // The compiler intrinsic for isInterface tests the
1121 // Klass::_access_flags bits in the same way.
1122 return result;
1123 JVM_END
1124
1125
1126 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1127 JVMWrapper("JVM_GetClassSigners");
1128 JvmtiVMObjectAllocEventCollector oam;
1129 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1130 // There are no signers for primitive types
1131 return NULL;
1132 }
1133
1134 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1135
1136 // If there are no signers set in the class, or if the class
1137 // is an array, return NULL.
1138 if (signers == NULL) return NULL;
1139
1140 // copy of the signers array
1141 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1142 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1143 for (int index = 0; index < signers->length(); index++) {
1144 signers_copy->obj_at_put(index, signers->obj_at(index));
1145 }
1146
1147 // return the copy
1148 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1149 JVM_END
1150
1151
1152 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1153 JVMWrapper("JVM_SetClassSigners");
1154 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1155 // This call is ignored for primitive types and arrays.
1156 // Signers are only set once, ClassLoader.java, and thus shouldn't
1157 // be called with an array. Only the bootstrap loader creates arrays.
1158 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1159 if (k->is_instance_klass()) {
1160 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1161 }
1162 }
1163 JVM_END
1164
1165
1166 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1167 JVMWrapper("JVM_GetProtectionDomain");
1168 if (JNIHandles::resolve(cls) == NULL) {
1169 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1170 }
1171
1172 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1173 // Primitive types does not have a protection domain.
1174 return NULL;
1175 }
1176
1177 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1178 return (jobject) JNIHandles::make_local(env, pd);
1179 JVM_END
1180
1181
1182 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1183 // If there is a security manager and protection domain, check the access
1184 // in the protection domain, otherwise it is authorized.
1185 if (java_lang_System::has_security_manager()) {
1186
1187 // For bootstrapping, if pd implies method isn't in the JDK, allow
1188 // this context to revert to older behavior.
1189 // In this case the isAuthorized field in AccessControlContext is also not
1190 // present.
1191 if (Universe::protection_domain_implies_method() == NULL) {
1192 return true;
1193 }
1194
1195 // Whitelist certain access control contexts
1196 if (java_security_AccessControlContext::is_authorized(context)) {
1197 return true;
1198 }
1199
1200 oop prot = klass->protection_domain();
1201 if (prot != NULL) {
1202 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1203 // in the new wrapper.
1204 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1205 Handle h_prot(THREAD, prot);
1206 JavaValue result(T_BOOLEAN);
1207 JavaCallArguments args(h_prot);
1208 JavaCalls::call(&result, m, &args, CHECK_false);
1209 return (result.get_jboolean() != 0);
1210 }
1211 }
1212 return true;
1213 }
1214
1215 // Create an AccessControlContext with a protection domain with null codesource
1216 // and null permissions - which gives no permissions.
1217 oop create_dummy_access_control_context(TRAPS) {
1218 InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1219 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1220 // Call constructor ProtectionDomain(null, null);
1221 JavaValue result(T_VOID);
1222 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1223 vmSymbols::object_initializer_name(),
1224 vmSymbols::codesource_permissioncollection_signature(),
1225 Handle(), Handle(), CHECK_NULL);
1226
1227 // new ProtectionDomain[] {pd};
1228 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1229 context->obj_at_put(0, obj());
1230
1231 // new AccessControlContext(new ProtectionDomain[] {pd})
1232 objArrayHandle h_context(THREAD, context);
1233 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1234 return acc;
1235 }
1236
1237 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1238 JVMWrapper("JVM_DoPrivileged");
1239
1240 if (action == NULL) {
1241 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1242 }
1243
1244 // Compute the frame initiating the do privileged operation and setup the privileged stack
1245 vframeStream vfst(thread);
1246 vfst.security_get_caller_frame(1);
1247
1248 if (vfst.at_end()) {
1249 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1250 }
1251
1252 Method* method = vfst.method();
1253 instanceKlassHandle klass (THREAD, method->method_holder());
1254
1255 // Check that action object understands "Object run()"
1256 Handle h_context;
1257 if (context != NULL) {
1258 h_context = Handle(THREAD, JNIHandles::resolve(context));
1259 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1260 if (!authorized) {
1261 // Create an unprivileged access control object and call it's run function
1262 // instead.
1263 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1264 h_context = Handle(THREAD, noprivs);
1265 }
1266 }
1267
1268 // Check that action object understands "Object run()"
1269 Handle object (THREAD, JNIHandles::resolve(action));
1270
1271 // get run() method
1272 Method* m_oop = object->klass()->uncached_lookup_method(
1273 vmSymbols::run_method_name(),
1274 vmSymbols::void_object_signature(),
1275 Klass::find_overpass);
1276 methodHandle m (THREAD, m_oop);
1277 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1278 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1279 }
1280
1281 // Stack allocated list of privileged stack elements
1282 PrivilegedElement pi;
1283 if (!vfst.at_end()) {
1284 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1285 thread->set_privileged_stack_top(&pi);
1286 }
1287
1288
1289 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1290 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1291 Handle pending_exception;
1292 JavaValue result(T_OBJECT);
1293 JavaCallArguments args(object);
1294 JavaCalls::call(&result, m, &args, THREAD);
1295
1296 // done with action, remove ourselves from the list
1297 if (!vfst.at_end()) {
1298 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1299 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1300 }
1301
1302 if (HAS_PENDING_EXCEPTION) {
1303 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1304 CLEAR_PENDING_EXCEPTION;
1305 // JVMTI has already reported the pending exception
1306 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1307 if (THREAD->is_Java_thread()) {
1308 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1309 }
1310 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1311 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1312 // Throw a java.security.PrivilegedActionException(Exception e) exception
1313 JavaCallArguments args(pending_exception);
1314 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1315 vmSymbols::exception_void_signature(),
1316 &args);
1317 }
1318 }
1319
1320 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1321 return JNIHandles::make_local(env, (oop) result.get_jobject());
1322 JVM_END
1323
1324
1325 // Returns the inherited_access_control_context field of the running thread.
1326 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1327 JVMWrapper("JVM_GetInheritedAccessControlContext");
1328 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1329 return JNIHandles::make_local(env, result);
1330 JVM_END
1331
1332 class RegisterArrayForGC {
1333 private:
1334 JavaThread *_thread;
1335 public:
1336 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1337 _thread = thread;
1338 _thread->register_array_for_gc(array);
1339 }
1340
1341 ~RegisterArrayForGC() {
1342 _thread->register_array_for_gc(NULL);
1343 }
1344 };
1345
1346
1347 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1348 JVMWrapper("JVM_GetStackAccessControlContext");
1349 if (!UsePrivilegedStack) return NULL;
1350
1351 ResourceMark rm(THREAD);
1352 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1353 JvmtiVMObjectAllocEventCollector oam;
1354
1355 // count the protection domains on the execution stack. We collapse
1356 // duplicate consecutive protection domains into a single one, as
1357 // well as stopping when we hit a privileged frame.
1358
1359 // Use vframeStream to iterate through Java frames
1360 vframeStream vfst(thread);
1361
1362 oop previous_protection_domain = NULL;
1363 Handle privileged_context(thread, NULL);
1364 bool is_privileged = false;
1365 oop protection_domain = NULL;
1366
1367 for(; !vfst.at_end(); vfst.next()) {
1368 // get method of frame
1369 Method* method = vfst.method();
1370 intptr_t* frame_id = vfst.frame_id();
1371
1372 // check the privileged frames to see if we have a match
1373 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1374 // this frame is privileged
1375 is_privileged = true;
1376 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1377 protection_domain = thread->privileged_stack_top()->protection_domain();
1378 } else {
1379 protection_domain = method->method_holder()->protection_domain();
1380 }
1381
1382 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1383 local_array->push(protection_domain);
1384 previous_protection_domain = protection_domain;
1385 }
1386
1387 if (is_privileged) break;
1388 }
1389
1390
1391 // either all the domains on the stack were system domains, or
1392 // we had a privileged system domain
1393 if (local_array->is_empty()) {
1394 if (is_privileged && privileged_context.is_null()) return NULL;
1395
1396 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1397 return JNIHandles::make_local(env, result);
1398 }
1399
1400 // the resource area must be registered in case of a gc
1401 RegisterArrayForGC ragc(thread, local_array);
1402 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1403 local_array->length(), CHECK_NULL);
1404 objArrayHandle h_context(thread, context);
1405 for (int index = 0; index < local_array->length(); index++) {
1406 h_context->obj_at_put(index, local_array->at(index));
1407 }
1408
1409 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1410
1411 return JNIHandles::make_local(env, result);
1412 JVM_END
1413
1414
1415 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1416 JVMWrapper("JVM_IsArrayClass");
1417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1418 return (k != NULL) && k->is_array_klass() ? true : false;
1419 JVM_END
1420
1421
1422 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1423 JVMWrapper("JVM_IsPrimitiveClass");
1424 oop mirror = JNIHandles::resolve_non_null(cls);
1425 return (jboolean) java_lang_Class::is_primitive(mirror);
1426 JVM_END
1427
1428
1429 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1430 JVMWrapper("JVM_GetClassModifiers");
1431 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1432 // Primitive type
1433 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1434 }
1435
1436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1437 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1438 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1439 return k->modifier_flags();
1440 JVM_END
1441
1442
1443 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1444
1445 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1446 JvmtiVMObjectAllocEventCollector oam;
1447 // ofClass is a reference to a java_lang_Class object. The mirror object
1448 // of an InstanceKlass
1449
1450 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1451 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1452 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1453 return (jobjectArray)JNIHandles::make_local(env, result);
1454 }
1455
1456 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1457 InnerClassesIterator iter(k);
1458
1459 if (iter.length() == 0) {
1460 // Neither an inner nor outer class
1461 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1462 return (jobjectArray)JNIHandles::make_local(env, result);
1463 }
1464
1465 // find inner class info
1466 constantPoolHandle cp(thread, k->constants());
1467 int length = iter.length();
1468
1469 // Allocate temp. result array
1470 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1471 objArrayHandle result (THREAD, r);
1472 int members = 0;
1473
1474 for (; !iter.done(); iter.next()) {
1475 int ioff = iter.inner_class_info_index();
1476 int ooff = iter.outer_class_info_index();
1477
1478 if (ioff != 0 && ooff != 0) {
1479 // Check to see if the name matches the class we're looking for
1480 // before attempting to find the class.
1481 if (cp->klass_name_at_matches(k, ooff)) {
1482 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1483 if (outer_klass == k()) {
1484 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1485 instanceKlassHandle inner_klass (THREAD, ik);
1486
1487 // Throws an exception if outer klass has not declared k as
1488 // an inner klass
1489 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1490
1491 result->obj_at_put(members, inner_klass->java_mirror());
1492 members++;
1493 }
1494 }
1495 }
1496 }
1497
1498 if (members != length) {
1499 // Return array of right length
1500 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1501 for(int i = 0; i < members; i++) {
1502 res->obj_at_put(i, result->obj_at(i));
1503 }
1504 return (jobjectArray)JNIHandles::make_local(env, res);
1505 }
1506
1507 return (jobjectArray)JNIHandles::make_local(env, result());
1508 JVM_END
1509
1510
1511 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1512 {
1513 // ofClass is a reference to a java_lang_Class object.
1514 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1515 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1516 return NULL;
1517 }
1518
1519 bool inner_is_member = false;
1520 Klass* outer_klass
1521 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1522 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1523 if (outer_klass == NULL) return NULL; // already a top-level class
1524 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1525 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1526 }
1527 JVM_END
1528
1529 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1530 {
1531 oop mirror = JNIHandles::resolve_non_null(cls);
1532 if (java_lang_Class::is_primitive(mirror) ||
1533 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1534 return NULL;
1535 }
1536 instanceKlassHandle k(THREAD, InstanceKlass::cast(java_lang_Class::as_Klass(mirror)));
1537 int ooff = 0, noff = 0;
1538 if (InstanceKlass::find_inner_classes_attr(k, &ooff, &noff, THREAD)) {
1539 if (noff != 0) {
1540 constantPoolHandle i_cp(thread, k->constants());
1541 Symbol* name = i_cp->symbol_at(noff);
1542 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1543 return (jstring) JNIHandles::make_local(env, str());
1544 }
1545 }
1546 return NULL;
1547 }
1548 JVM_END
1549
1550 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1551 assert (cls != NULL, "illegal class");
1552 JVMWrapper("JVM_GetClassSignature");
1553 JvmtiVMObjectAllocEventCollector oam;
1554 ResourceMark rm(THREAD);
1555 // Return null for arrays and primatives
1556 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1557 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1558 if (k->is_instance_klass()) {
1559 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1560 if (sym == NULL) return NULL;
1561 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1562 return (jstring) JNIHandles::make_local(env, str());
1563 }
1564 }
1565 return NULL;
1566 JVM_END
1567
1568
1569 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1570 assert (cls != NULL, "illegal class");
1571 JVMWrapper("JVM_GetClassAnnotations");
1572
1573 // Return null for arrays and primitives
1574 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1575 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1576 if (k->is_instance_klass()) {
1577 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1578 return (jbyteArray) JNIHandles::make_local(env, a);
1579 }
1580 }
1581 return NULL;
1582 JVM_END
1583
1584
1585 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1586 // some of this code was adapted from from jni_FromReflectedField
1587
1588 oop reflected = JNIHandles::resolve_non_null(field);
1589 oop mirror = java_lang_reflect_Field::clazz(reflected);
1590 Klass* k = java_lang_Class::as_Klass(mirror);
1591 int slot = java_lang_reflect_Field::slot(reflected);
1592 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1593
1594 KlassHandle kh(THREAD, k);
1595 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1596
1597 if (modifiers & JVM_ACC_STATIC) {
1598 // for static fields we only look in the current class
1599 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1600 assert(false, "cannot find static field");
1601 return false;
1602 }
1603 } else {
1604 // for instance fields we start with the current class and work
1605 // our way up through the superclass chain
1606 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1607 assert(false, "cannot find instance field");
1608 return false;
1609 }
1610 }
1611 return true;
1612 }
1613
1614 static Method* jvm_get_method_common(jobject method) {
1615 // some of this code was adapted from from jni_FromReflectedMethod
1616
1617 oop reflected = JNIHandles::resolve_non_null(method);
1618 oop mirror = NULL;
1619 int slot = 0;
1620
1621 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1622 mirror = java_lang_reflect_Constructor::clazz(reflected);
1623 slot = java_lang_reflect_Constructor::slot(reflected);
1624 } else {
1625 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1626 "wrong type");
1627 mirror = java_lang_reflect_Method::clazz(reflected);
1628 slot = java_lang_reflect_Method::slot(reflected);
1629 }
1630 Klass* k = java_lang_Class::as_Klass(mirror);
1631
1632 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1633 assert(m != NULL, "cannot find method");
1634 return m; // caller has to deal with NULL in product mode
1635 }
1636
1637 /* Type use annotations support (JDK 1.8) */
1638
1639 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1640 assert (cls != NULL, "illegal class");
1641 JVMWrapper("JVM_GetClassTypeAnnotations");
1642 ResourceMark rm(THREAD);
1643 // Return null for arrays and primitives
1644 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1645 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1646 if (k->is_instance_klass()) {
1647 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1648 if (type_annotations != NULL) {
1649 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1650 return (jbyteArray) JNIHandles::make_local(env, a);
1651 }
1652 }
1653 }
1654 return NULL;
1655 JVM_END
1656
1657 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1658 assert (method != NULL, "illegal method");
1659 JVMWrapper("JVM_GetMethodTypeAnnotations");
1660
1661 // method is a handle to a java.lang.reflect.Method object
1662 Method* m = jvm_get_method_common(method);
1663 if (m == NULL) {
1664 return NULL;
1665 }
1666
1667 AnnotationArray* type_annotations = m->type_annotations();
1668 if (type_annotations != NULL) {
1669 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1670 return (jbyteArray) JNIHandles::make_local(env, a);
1671 }
1672
1673 return NULL;
1674 JVM_END
1675
1676 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1677 assert (field != NULL, "illegal field");
1678 JVMWrapper("JVM_GetFieldTypeAnnotations");
1679
1680 fieldDescriptor fd;
1681 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1682 if (!gotFd) {
1683 return NULL;
1684 }
1685
1686 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1687 JVM_END
1688
1689 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1690 if (!cp->is_within_bounds(index)) {
1691 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1692 }
1693 }
1694
1695 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1696 {
1697 JVMWrapper("JVM_GetMethodParameters");
1698 // method is a handle to a java.lang.reflect.Method object
1699 Method* method_ptr = jvm_get_method_common(method);
1700 methodHandle mh (THREAD, method_ptr);
1701 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1702 const int num_params = mh->method_parameters_length();
1703
1704 if (num_params < 0) {
1705 // A -1 return value from method_parameters_length means there is no
1706 // parameter data. Return null to indicate this to the reflection
1707 // API.
1708 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1709 return (jobjectArray)NULL;
1710 } else {
1711 // Otherwise, we return something up to reflection, even if it is
1712 // a zero-length array. Why? Because in some cases this can
1713 // trigger a MalformedParametersException.
1714
1715 // make sure all the symbols are properly formatted
1716 for (int i = 0; i < num_params; i++) {
1717 MethodParametersElement* params = mh->method_parameters_start();
1718 int index = params[i].name_cp_index;
1719 bounds_check(mh->constants(), index, CHECK_NULL);
1720
1721 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1722 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1723 "Wrong type at constant pool index");
1724 }
1725
1726 }
1727
1728 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1729 objArrayHandle result (THREAD, result_oop);
1730
1731 for (int i = 0; i < num_params; i++) {
1732 MethodParametersElement* params = mh->method_parameters_start();
1733 // For a 0 index, give a NULL symbol
1734 Symbol* sym = 0 != params[i].name_cp_index ?
1735 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1736 int flags = params[i].flags;
1737 oop param = Reflection::new_parameter(reflected_method, i, sym,
1738 flags, CHECK_NULL);
1739 result->obj_at_put(i, param);
1740 }
1741 return (jobjectArray)JNIHandles::make_local(env, result());
1742 }
1743 }
1744 JVM_END
1745
1746 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1747
1748 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1749 {
1750 JVMWrapper("JVM_GetClassDeclaredFields");
1751 JvmtiVMObjectAllocEventCollector oam;
1752
1753 // Exclude primitive types and array types
1754 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1755 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1756 // Return empty array
1757 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1758 return (jobjectArray) JNIHandles::make_local(env, res);
1759 }
1760
1761 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1762 constantPoolHandle cp(THREAD, k->constants());
1763
1764 // Ensure class is linked
1765 k->link_class(CHECK_NULL);
1766
1767 // 4496456 We need to filter out java.lang.Throwable.backtrace
1768 bool skip_backtrace = false;
1769
1770 // Allocate result
1771 int num_fields;
1772
1773 if (publicOnly) {
1774 num_fields = 0;
1775 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1776 if (fs.access_flags().is_public()) ++num_fields;
1777 }
1778 } else {
1779 num_fields = k->java_fields_count();
1780
1781 if (k() == SystemDictionary::Throwable_klass()) {
1782 num_fields--;
1783 skip_backtrace = true;
1784 }
1785 }
1786
1787 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1788 objArrayHandle result (THREAD, r);
1789
1790 int out_idx = 0;
1791 fieldDescriptor fd;
1792 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1793 if (skip_backtrace) {
1794 // 4496456 skip java.lang.Throwable.backtrace
1795 int offset = fs.offset();
1796 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1797 }
1798
1799 if (!publicOnly || fs.access_flags().is_public()) {
1800 fd.reinitialize(k(), fs.index());
1801 oop field = Reflection::new_field(&fd, CHECK_NULL);
1802 result->obj_at_put(out_idx, field);
1803 ++out_idx;
1804 }
1805 }
1806 assert(out_idx == num_fields, "just checking");
1807 return (jobjectArray) JNIHandles::make_local(env, result());
1808 }
1809 JVM_END
1810
1811 static bool select_method(methodHandle method, bool want_constructor) {
1812 if (want_constructor) {
1813 return (method->is_initializer() && !method->is_static());
1814 } else {
1815 return (!method->is_initializer() && !method->is_overpass());
1816 }
1817 }
1818
1819 static jobjectArray get_class_declared_methods_helper(
1820 JNIEnv *env,
1821 jclass ofClass, jboolean publicOnly,
1822 bool want_constructor,
1823 Klass* klass, TRAPS) {
1824
1825 JvmtiVMObjectAllocEventCollector oam;
1826
1827 // Exclude primitive types and array types
1828 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1829 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1830 // Return empty array
1831 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1832 return (jobjectArray) JNIHandles::make_local(env, res);
1833 }
1834
1835 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1836
1837 // Ensure class is linked
1838 k->link_class(CHECK_NULL);
1839
1840 Array<Method*>* methods = k->methods();
1841 int methods_length = methods->length();
1842
1843 // Save original method_idnum in case of redefinition, which can change
1844 // the idnum of obsolete methods. The new method will have the same idnum
1845 // but if we refresh the methods array, the counts will be wrong.
1846 ResourceMark rm(THREAD);
1847 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1848 int num_methods = 0;
1849
1850 for (int i = 0; i < methods_length; i++) {
1851 methodHandle method(THREAD, methods->at(i));
1852 if (select_method(method, want_constructor)) {
1853 if (!publicOnly || method->is_public()) {
1854 idnums->push(method->method_idnum());
1855 ++num_methods;
1856 }
1857 }
1858 }
1859
1860 // Allocate result
1861 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1862 objArrayHandle result (THREAD, r);
1863
1864 // Now just put the methods that we selected above, but go by their idnum
1865 // in case of redefinition. The methods can be redefined at any safepoint,
1866 // so above when allocating the oop array and below when creating reflect
1867 // objects.
1868 for (int i = 0; i < num_methods; i++) {
1869 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1870 if (method.is_null()) {
1871 // Method may have been deleted and seems this API can handle null
1872 // Otherwise should probably put a method that throws NSME
1873 result->obj_at_put(i, NULL);
1874 } else {
1875 oop m;
1876 if (want_constructor) {
1877 m = Reflection::new_constructor(method, CHECK_NULL);
1878 } else {
1879 m = Reflection::new_method(method, false, CHECK_NULL);
1880 }
1881 result->obj_at_put(i, m);
1882 }
1883 }
1884
1885 return (jobjectArray) JNIHandles::make_local(env, result());
1886 }
1887
1888 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1889 {
1890 JVMWrapper("JVM_GetClassDeclaredMethods");
1891 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1892 /*want_constructor*/ false,
1893 SystemDictionary::reflect_Method_klass(), THREAD);
1894 }
1895 JVM_END
1896
1897 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1898 {
1899 JVMWrapper("JVM_GetClassDeclaredConstructors");
1900 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1901 /*want_constructor*/ true,
1902 SystemDictionary::reflect_Constructor_klass(), THREAD);
1903 }
1904 JVM_END
1905
1906 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1907 {
1908 JVMWrapper("JVM_GetClassAccessFlags");
1909 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1910 // Primitive type
1911 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1912 }
1913
1914 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1915 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1916 }
1917 JVM_END
1918
1919
1920 // Constant pool access //////////////////////////////////////////////////////////
1921
1922 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1923 {
1924 JVMWrapper("JVM_GetClassConstantPool");
1925 JvmtiVMObjectAllocEventCollector oam;
1926
1927 // Return null for primitives and arrays
1928 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1929 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1930 if (k->is_instance_klass()) {
1931 instanceKlassHandle k_h(THREAD, k);
1932 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1933 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1934 return JNIHandles::make_local(jcp());
1935 }
1936 }
1937 return NULL;
1938 }
1939 JVM_END
1940
1941
1942 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1943 {
1944 JVMWrapper("JVM_ConstantPoolGetSize");
1945 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1946 return cp->length();
1947 }
1948 JVM_END
1949
1950
1951 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1952 {
1953 JVMWrapper("JVM_ConstantPoolGetClassAt");
1954 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1955 bounds_check(cp, index, CHECK_NULL);
1956 constantTag tag = cp->tag_at(index);
1957 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1958 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1959 }
1960 Klass* k = cp->klass_at(index, CHECK_NULL);
1961 return (jclass) JNIHandles::make_local(k->java_mirror());
1962 }
1963 JVM_END
1964
1965 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1966 {
1967 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1968 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1969 bounds_check(cp, index, CHECK_NULL);
1970 constantTag tag = cp->tag_at(index);
1971 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1972 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1973 }
1974 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1975 if (k == NULL) return NULL;
1976 return (jclass) JNIHandles::make_local(k->java_mirror());
1977 }
1978 JVM_END
1979
1980 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1981 constantTag tag = cp->tag_at(index);
1982 if (!tag.is_method() && !tag.is_interface_method()) {
1983 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1984 }
1985 int klass_ref = cp->uncached_klass_ref_index_at(index);
1986 Klass* k_o;
1987 if (force_resolution) {
1988 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1989 } else {
1990 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1991 if (k_o == NULL) return NULL;
1992 }
1993 instanceKlassHandle k(THREAD, k_o);
1994 Symbol* name = cp->uncached_name_ref_at(index);
1995 Symbol* sig = cp->uncached_signature_ref_at(index);
1996 methodHandle m (THREAD, k->find_method(name, sig));
1997 if (m.is_null()) {
1998 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1999 }
2000 oop method;
2001 if (!m->is_initializer() || m->is_static()) {
2002 method = Reflection::new_method(m, true, CHECK_NULL);
2003 } else {
2004 method = Reflection::new_constructor(m, CHECK_NULL);
2005 }
2006 return JNIHandles::make_local(method);
2007 }
2008
2009 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2010 {
2011 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2012 JvmtiVMObjectAllocEventCollector oam;
2013 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2014 bounds_check(cp, index, CHECK_NULL);
2015 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2016 return res;
2017 }
2018 JVM_END
2019
2020 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2021 {
2022 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2023 JvmtiVMObjectAllocEventCollector oam;
2024 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2025 bounds_check(cp, index, CHECK_NULL);
2026 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2027 return res;
2028 }
2029 JVM_END
2030
2031 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2032 constantTag tag = cp->tag_at(index);
2033 if (!tag.is_field()) {
2034 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2035 }
2036 int klass_ref = cp->uncached_klass_ref_index_at(index);
2037 Klass* k_o;
2038 if (force_resolution) {
2039 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2040 } else {
2041 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2042 if (k_o == NULL) return NULL;
2043 }
2044 instanceKlassHandle k(THREAD, k_o);
2045 Symbol* name = cp->uncached_name_ref_at(index);
2046 Symbol* sig = cp->uncached_signature_ref_at(index);
2047 fieldDescriptor fd;
2048 Klass* target_klass = k->find_field(name, sig, &fd);
2049 if (target_klass == NULL) {
2050 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2051 }
2052 oop field = Reflection::new_field(&fd, CHECK_NULL);
2053 return JNIHandles::make_local(field);
2054 }
2055
2056 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2057 {
2058 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2059 JvmtiVMObjectAllocEventCollector oam;
2060 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2061 bounds_check(cp, index, CHECK_NULL);
2062 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2063 return res;
2064 }
2065 JVM_END
2066
2067 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2068 {
2069 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2070 JvmtiVMObjectAllocEventCollector oam;
2071 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2072 bounds_check(cp, index, CHECK_NULL);
2073 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2074 return res;
2075 }
2076 JVM_END
2077
2078 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2079 {
2080 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2081 JvmtiVMObjectAllocEventCollector oam;
2082 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2083 bounds_check(cp, index, CHECK_NULL);
2084 constantTag tag = cp->tag_at(index);
2085 if (!tag.is_field_or_method()) {
2086 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2087 }
2088 int klass_ref = cp->uncached_klass_ref_index_at(index);
2089 Symbol* klass_name = cp->klass_name_at(klass_ref);
2090 Symbol* member_name = cp->uncached_name_ref_at(index);
2091 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2092 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2093 objArrayHandle dest(THREAD, dest_o);
2094 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2095 dest->obj_at_put(0, str());
2096 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2097 dest->obj_at_put(1, str());
2098 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2099 dest->obj_at_put(2, str());
2100 return (jobjectArray) JNIHandles::make_local(dest());
2101 }
2102 JVM_END
2103
2104 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2105 {
2106 JVMWrapper("JVM_ConstantPoolGetIntAt");
2107 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2108 bounds_check(cp, index, CHECK_0);
2109 constantTag tag = cp->tag_at(index);
2110 if (!tag.is_int()) {
2111 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2112 }
2113 return cp->int_at(index);
2114 }
2115 JVM_END
2116
2117 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2118 {
2119 JVMWrapper("JVM_ConstantPoolGetLongAt");
2120 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2121 bounds_check(cp, index, CHECK_(0L));
2122 constantTag tag = cp->tag_at(index);
2123 if (!tag.is_long()) {
2124 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2125 }
2126 return cp->long_at(index);
2127 }
2128 JVM_END
2129
2130 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2131 {
2132 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2133 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2134 bounds_check(cp, index, CHECK_(0.0f));
2135 constantTag tag = cp->tag_at(index);
2136 if (!tag.is_float()) {
2137 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2138 }
2139 return cp->float_at(index);
2140 }
2141 JVM_END
2142
2143 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2144 {
2145 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2146 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2147 bounds_check(cp, index, CHECK_(0.0));
2148 constantTag tag = cp->tag_at(index);
2149 if (!tag.is_double()) {
2150 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2151 }
2152 return cp->double_at(index);
2153 }
2154 JVM_END
2155
2156 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2157 {
2158 JVMWrapper("JVM_ConstantPoolGetStringAt");
2159 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2160 bounds_check(cp, index, CHECK_NULL);
2161 constantTag tag = cp->tag_at(index);
2162 if (!tag.is_string()) {
2163 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2164 }
2165 oop str = cp->string_at(index, CHECK_NULL);
2166 return (jstring) JNIHandles::make_local(str);
2167 }
2168 JVM_END
2169
2170 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2171 {
2172 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2173 JvmtiVMObjectAllocEventCollector oam;
2174 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2175 bounds_check(cp, index, CHECK_NULL);
2176 constantTag tag = cp->tag_at(index);
2177 if (!tag.is_symbol()) {
2178 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2179 }
2180 Symbol* sym = cp->symbol_at(index);
2181 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2182 return (jstring) JNIHandles::make_local(str());
2183 }
2184 JVM_END
2185
2186
2187 // Assertion support. //////////////////////////////////////////////////////////
2188
2189 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2190 JVMWrapper("JVM_DesiredAssertionStatus");
2191 assert(cls != NULL, "bad class");
2192
2193 oop r = JNIHandles::resolve(cls);
2194 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2195 if (java_lang_Class::is_primitive(r)) return false;
2196
2197 Klass* k = java_lang_Class::as_Klass(r);
2198 assert(k->is_instance_klass(), "must be an instance klass");
2199 if (!k->is_instance_klass()) return false;
2200
2201 ResourceMark rm(THREAD);
2202 const char* name = k->name()->as_C_string();
2203 bool system_class = k->class_loader() == NULL;
2204 return JavaAssertions::enabled(name, system_class);
2205
2206 JVM_END
2207
2208
2209 // Return a new AssertionStatusDirectives object with the fields filled in with
2210 // command-line assertion arguments (i.e., -ea, -da).
2211 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2212 JVMWrapper("JVM_AssertionStatusDirectives");
2213 JvmtiVMObjectAllocEventCollector oam;
2214 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2215 return JNIHandles::make_local(env, asd);
2216 JVM_END
2217
2218 // Verification ////////////////////////////////////////////////////////////////////////////////
2219
2220 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2221
2222 // RedefineClasses support: bug 6214132 caused verification to fail.
2223 // All functions from this section should call the jvmtiThreadSate function:
2224 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2225 // The function returns a Klass* of the _scratch_class if the verifier
2226 // was invoked in the middle of the class redefinition.
2227 // Otherwise it returns its argument value which is the _the_class Klass*.
2228 // Please, refer to the description in the jvmtiThreadSate.hpp.
2229
2230 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2231 JVMWrapper("JVM_GetClassNameUTF");
2232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2233 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2234 return k->name()->as_utf8();
2235 JVM_END
2236
2237
2238 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2239 JVMWrapper("JVM_GetClassCPTypes");
2240 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2241 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2242 // types will have length zero if this is not an InstanceKlass
2243 // (length is determined by call to JVM_GetClassCPEntriesCount)
2244 if (k->is_instance_klass()) {
2245 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2246 for (int index = cp->length() - 1; index >= 0; index--) {
2247 constantTag tag = cp->tag_at(index);
2248 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2249 }
2250 }
2251 JVM_END
2252
2253
2254 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2255 JVMWrapper("JVM_GetClassCPEntriesCount");
2256 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2257 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2258 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2259 JVM_END
2260
2261
2262 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2263 JVMWrapper("JVM_GetClassFieldsCount");
2264 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2265 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2266 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2267 JVM_END
2268
2269
2270 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2271 JVMWrapper("JVM_GetClassMethodsCount");
2272 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2273 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2274 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2275 JVM_END
2276
2277
2278 // The following methods, used for the verifier, are never called with
2279 // array klasses, so a direct cast to InstanceKlass is safe.
2280 // Typically, these methods are called in a loop with bounds determined
2281 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2282 // zero for arrays.
2283 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2284 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2285 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2286 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2287 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2288 int length = method->checked_exceptions_length();
2289 if (length > 0) {
2290 CheckedExceptionElement* table= method->checked_exceptions_start();
2291 for (int i = 0; i < length; i++) {
2292 exceptions[i] = table[i].class_cp_index;
2293 }
2294 }
2295 JVM_END
2296
2297
2298 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2299 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2300 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2301 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2302 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2303 return method->checked_exceptions_length();
2304 JVM_END
2305
2306
2307 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2308 JVMWrapper("JVM_GetMethodIxByteCode");
2309 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2310 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2311 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2312 memcpy(code, method->code_base(), method->code_size());
2313 JVM_END
2314
2315
2316 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2317 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2318 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2319 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2320 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2321 return method->code_size();
2322 JVM_END
2323
2324
2325 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2326 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2328 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2329 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2330 ExceptionTable extable(method);
2331 entry->start_pc = extable.start_pc(entry_index);
2332 entry->end_pc = extable.end_pc(entry_index);
2333 entry->handler_pc = extable.handler_pc(entry_index);
2334 entry->catchType = extable.catch_type_index(entry_index);
2335 JVM_END
2336
2337
2338 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2339 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2340 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2341 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2342 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2343 return method->exception_table_length();
2344 JVM_END
2345
2346
2347 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2348 JVMWrapper("JVM_GetMethodIxModifiers");
2349 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2350 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2351 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2352 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2353 JVM_END
2354
2355
2356 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2357 JVMWrapper("JVM_GetFieldIxModifiers");
2358 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2359 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2361 JVM_END
2362
2363
2364 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2365 JVMWrapper("JVM_GetMethodIxLocalsCount");
2366 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2367 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2368 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2369 return method->max_locals();
2370 JVM_END
2371
2372
2373 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2374 JVMWrapper("JVM_GetMethodIxArgsSize");
2375 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2376 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2377 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2378 return method->size_of_parameters();
2379 JVM_END
2380
2381
2382 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2383 JVMWrapper("JVM_GetMethodIxMaxStack");
2384 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2385 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2386 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2387 return method->verifier_max_stack();
2388 JVM_END
2389
2390
2391 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2392 JVMWrapper("JVM_IsConstructorIx");
2393 ResourceMark rm(THREAD);
2394 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2395 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2396 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2397 return method->name() == vmSymbols::object_initializer_name();
2398 JVM_END
2399
2400
2401 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2402 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2403 ResourceMark rm(THREAD);
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->is_overpass();
2408 JVM_END
2409
2410 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2411 JVMWrapper("JVM_GetMethodIxIxUTF");
2412 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2413 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2414 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2415 return method->name()->as_utf8();
2416 JVM_END
2417
2418
2419 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2420 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2421 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2422 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2423 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2424 return method->signature()->as_utf8();
2425 JVM_END
2426
2427 /**
2428 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2429 * read entries in the constant pool. Since the old verifier always
2430 * works on a copy of the code, it will not see any rewriting that
2431 * may possibly occur in the middle of verification. So it is important
2432 * that nothing it calls tries to use the cpCache instead of the raw
2433 * constant pool, so we must use cp->uncached_x methods when appropriate.
2434 */
2435 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2436 JVMWrapper("JVM_GetCPFieldNameUTF");
2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2439 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2440 switch (cp->tag_at(cp_index).value()) {
2441 case JVM_CONSTANT_Fieldref:
2442 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2443 default:
2444 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2445 }
2446 ShouldNotReachHere();
2447 return NULL;
2448 JVM_END
2449
2450
2451 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2452 JVMWrapper("JVM_GetCPMethodNameUTF");
2453 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2454 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2455 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2456 switch (cp->tag_at(cp_index).value()) {
2457 case JVM_CONSTANT_InterfaceMethodref:
2458 case JVM_CONSTANT_Methodref:
2459 case JVM_CONSTANT_NameAndType: // for invokedynamic
2460 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2461 default:
2462 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2463 }
2464 ShouldNotReachHere();
2465 return NULL;
2466 JVM_END
2467
2468
2469 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2470 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2471 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2472 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2473 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2474 switch (cp->tag_at(cp_index).value()) {
2475 case JVM_CONSTANT_InterfaceMethodref:
2476 case JVM_CONSTANT_Methodref:
2477 case JVM_CONSTANT_NameAndType: // for invokedynamic
2478 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2479 default:
2480 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2481 }
2482 ShouldNotReachHere();
2483 return NULL;
2484 JVM_END
2485
2486
2487 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2488 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2490 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2491 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2492 switch (cp->tag_at(cp_index).value()) {
2493 case JVM_CONSTANT_Fieldref:
2494 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2495 default:
2496 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2497 }
2498 ShouldNotReachHere();
2499 return NULL;
2500 JVM_END
2501
2502
2503 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2504 JVMWrapper("JVM_GetCPClassNameUTF");
2505 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2506 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2507 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2508 Symbol* classname = cp->klass_name_at(cp_index);
2509 return classname->as_utf8();
2510 JVM_END
2511
2512
2513 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2514 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2515 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2516 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2517 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2518 switch (cp->tag_at(cp_index).value()) {
2519 case JVM_CONSTANT_Fieldref: {
2520 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2521 Symbol* classname = cp->klass_name_at(class_index);
2522 return classname->as_utf8();
2523 }
2524 default:
2525 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2526 }
2527 ShouldNotReachHere();
2528 return NULL;
2529 JVM_END
2530
2531
2532 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2533 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2535 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2536 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2537 switch (cp->tag_at(cp_index).value()) {
2538 case JVM_CONSTANT_Methodref:
2539 case JVM_CONSTANT_InterfaceMethodref: {
2540 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2541 Symbol* classname = cp->klass_name_at(class_index);
2542 return classname->as_utf8();
2543 }
2544 default:
2545 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2546 }
2547 ShouldNotReachHere();
2548 return NULL;
2549 JVM_END
2550
2551
2552 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2553 JVMWrapper("JVM_GetCPFieldModifiers");
2554 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2555 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2556 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2557 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2558 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2559 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2560 switch (cp->tag_at(cp_index).value()) {
2561 case JVM_CONSTANT_Fieldref: {
2562 Symbol* name = cp->uncached_name_ref_at(cp_index);
2563 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2564 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2565 if (fs.name() == name && fs.signature() == signature) {
2566 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2567 }
2568 }
2569 return -1;
2570 }
2571 default:
2572 fatal("JVM_GetCPFieldModifiers: illegal constant");
2573 }
2574 ShouldNotReachHere();
2575 return 0;
2576 JVM_END
2577
2578
2579 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2580 JVMWrapper("JVM_GetCPMethodModifiers");
2581 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2582 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2583 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2584 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2585 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2586 switch (cp->tag_at(cp_index).value()) {
2587 case JVM_CONSTANT_Methodref:
2588 case JVM_CONSTANT_InterfaceMethodref: {
2589 Symbol* name = cp->uncached_name_ref_at(cp_index);
2590 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2591 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2592 int methods_count = methods->length();
2593 for (int i = 0; i < methods_count; i++) {
2594 Method* method = methods->at(i);
2595 if (method->name() == name && method->signature() == signature) {
2596 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2597 }
2598 }
2599 return -1;
2600 }
2601 default:
2602 fatal("JVM_GetCPMethodModifiers: illegal constant");
2603 }
2604 ShouldNotReachHere();
2605 return 0;
2606 JVM_END
2607
2608
2609 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2610
2611 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2612 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2613 JVM_END
2614
2615
2616 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2617 JVMWrapper("JVM_IsSameClassPackage");
2618 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2619 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2620 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2621 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2622 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2623 JVM_END
2624
2625 // Printing support //////////////////////////////////////////////////
2626 extern "C" {
2627
2628 ATTRIBUTE_PRINTF(3, 0)
2629 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2630 // see bug 4399518, 4417214
2631 if ((intptr_t)count <= 0) return -1;
2632
2633 int result = vsnprintf(str, count, fmt, args);
2634 // Note: on truncation vsnprintf(3) on Unix returns numbers of
2635 // characters which would have been written had the buffer been large
2636 // enough; on Windows, it returns -1. We handle both cases here and
2637 // always return -1, and perform null termination.
2638 if ((result > 0 && (size_t)result >= count) || result == -1) {
2639 str[count - 1] = '\0';
2640 result = -1;
2641 }
2642
2643 return result;
2644 }
2645
2646 ATTRIBUTE_PRINTF(3, 0)
2647 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2648 va_list args;
2649 int len;
2650 va_start(args, fmt);
2651 len = jio_vsnprintf(str, count, fmt, args);
2652 va_end(args);
2653 return len;
2654 }
2655
2656 ATTRIBUTE_PRINTF(2,3)
2657 int jio_fprintf(FILE* f, const char *fmt, ...) {
2658 int len;
2659 va_list args;
2660 va_start(args, fmt);
2661 len = jio_vfprintf(f, fmt, args);
2662 va_end(args);
2663 return len;
2664 }
2665
2666 ATTRIBUTE_PRINTF(2, 0)
2667 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2668 if (Arguments::vfprintf_hook() != NULL) {
2669 return Arguments::vfprintf_hook()(f, fmt, args);
2670 } else {
2671 return vfprintf(f, fmt, args);
2672 }
2673 }
2674
2675 ATTRIBUTE_PRINTF(1, 2)
2676 JNIEXPORT int jio_printf(const char *fmt, ...) {
2677 int len;
2678 va_list args;
2679 va_start(args, fmt);
2680 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2681 va_end(args);
2682 return len;
2683 }
2684
2685
2686 // HotSpot specific jio method
2687 void jio_print(const char* s) {
2688 // Try to make this function as atomic as possible.
2689 if (Arguments::vfprintf_hook() != NULL) {
2690 jio_fprintf(defaultStream::output_stream(), "%s", s);
2691 } else {
2692 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2693 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2694 }
2695 }
2696
2697 } // Extern C
2698
2699 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2700
2701 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2702 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2703 // OSThread objects. The exception to this rule is when the target object is the thread
2704 // doing the operation, in which case we know that the thread won't exit until the
2705 // operation is done (all exits being voluntary). There are a few cases where it is
2706 // rather silly to do operations on yourself, like resuming yourself or asking whether
2707 // you are alive. While these can still happen, they are not subject to deadlocks if
2708 // the lock is held while the operation occurs (this is not the case for suspend, for
2709 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2710 // implementation is local to this file, we always lock Threads_lock for that one.
2711
2712 static void thread_entry(JavaThread* thread, TRAPS) {
2713 HandleMark hm(THREAD);
2714 Handle obj(THREAD, thread->threadObj());
2715 JavaValue result(T_VOID);
2716 JavaCalls::call_virtual(&result,
2717 obj,
2718 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2719 vmSymbols::run_method_name(),
2720 vmSymbols::void_method_signature(),
2721 THREAD);
2722 }
2723
2724
2725 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2726 JVMWrapper("JVM_StartThread");
2727 JavaThread *native_thread = NULL;
2728
2729 // We cannot hold the Threads_lock when we throw an exception,
2730 // due to rank ordering issues. Example: we might need to grab the
2731 // Heap_lock while we construct the exception.
2732 bool throw_illegal_thread_state = false;
2733
2734 // We must release the Threads_lock before we can post a jvmti event
2735 // in Thread::start.
2736 {
2737 // Ensure that the C++ Thread and OSThread structures aren't freed before
2738 // we operate.
2739 MutexLocker mu(Threads_lock);
2740
2741 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2742 // re-starting an already started thread, so we should usually find
2743 // that the JavaThread is null. However for a JNI attached thread
2744 // there is a small window between the Thread object being created
2745 // (with its JavaThread set) and the update to its threadStatus, so we
2746 // have to check for this
2747 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2748 throw_illegal_thread_state = true;
2749 } else {
2750 // We could also check the stillborn flag to see if this thread was already stopped, but
2751 // for historical reasons we let the thread detect that itself when it starts running
2752
2753 jlong size =
2754 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2755 // Allocate the C++ Thread structure and create the native thread. The
2756 // stack size retrieved from java is signed, but the constructor takes
2757 // size_t (an unsigned type), so avoid passing negative values which would
2758 // result in really large stacks.
2759 size_t sz = size > 0 ? (size_t) size : 0;
2760 native_thread = new JavaThread(&thread_entry, sz);
2761
2762 // At this point it may be possible that no osthread was created for the
2763 // JavaThread due to lack of memory. Check for this situation and throw
2764 // an exception if necessary. Eventually we may want to change this so
2765 // that we only grab the lock if the thread was created successfully -
2766 // then we can also do this check and throw the exception in the
2767 // JavaThread constructor.
2768 if (native_thread->osthread() != NULL) {
2769 // Note: the current thread is not being used within "prepare".
2770 native_thread->prepare(jthread);
2771 }
2772 }
2773 }
2774
2775 if (throw_illegal_thread_state) {
2776 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2777 }
2778
2779 assert(native_thread != NULL, "Starting null thread?");
2780
2781 if (native_thread->osthread() == NULL) {
2782 // No one should hold a reference to the 'native_thread'.
2783 delete native_thread;
2784 if (JvmtiExport::should_post_resource_exhausted()) {
2785 JvmtiExport::post_resource_exhausted(
2786 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2787 os::native_thread_creation_failed_msg());
2788 }
2789 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2790 os::native_thread_creation_failed_msg());
2791 }
2792
2793 Thread::start(native_thread);
2794
2795 JVM_END
2796
2797 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2798 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2799 // but is thought to be reliable and simple. In the case, where the receiver is the
2800 // same thread as the sender, no safepoint is needed.
2801 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2802 JVMWrapper("JVM_StopThread");
2803
2804 oop java_throwable = JNIHandles::resolve(throwable);
2805 if (java_throwable == NULL) {
2806 THROW(vmSymbols::java_lang_NullPointerException());
2807 }
2808 oop java_thread = JNIHandles::resolve_non_null(jthread);
2809 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2810 Events::log_exception(JavaThread::current(),
2811 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2812 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2813 // First check if thread is alive
2814 if (receiver != NULL) {
2815 // Check if exception is getting thrown at self (use oop equality, since the
2816 // target object might exit)
2817 if (java_thread == thread->threadObj()) {
2818 THROW_OOP(java_throwable);
2819 } else {
2820 // Enques a VM_Operation to stop all threads and then deliver the exception...
2821 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2822 }
2823 }
2824 else {
2825 // Either:
2826 // - target thread has not been started before being stopped, or
2827 // - target thread already terminated
2828 // We could read the threadStatus to determine which case it is
2829 // but that is overkill as it doesn't matter. We must set the
2830 // stillborn flag for the first case, and if the thread has already
2831 // exited setting this flag has no affect
2832 java_lang_Thread::set_stillborn(java_thread);
2833 }
2834 JVM_END
2835
2836
2837 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2838 JVMWrapper("JVM_IsThreadAlive");
2839
2840 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2841 return java_lang_Thread::is_alive(thread_oop);
2842 JVM_END
2843
2844
2845 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2846 JVMWrapper("JVM_SuspendThread");
2847 oop java_thread = JNIHandles::resolve_non_null(jthread);
2848 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2849
2850 if (receiver != NULL) {
2851 // thread has run and has not exited (still on threads list)
2852
2853 {
2854 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2855 if (receiver->is_external_suspend()) {
2856 // Don't allow nested external suspend requests. We can't return
2857 // an error from this interface so just ignore the problem.
2858 return;
2859 }
2860 if (receiver->is_exiting()) { // thread is in the process of exiting
2861 return;
2862 }
2863 receiver->set_external_suspend();
2864 }
2865
2866 // java_suspend() will catch threads in the process of exiting
2867 // and will ignore them.
2868 receiver->java_suspend();
2869
2870 // It would be nice to have the following assertion in all the
2871 // time, but it is possible for a racing resume request to have
2872 // resumed this thread right after we suspended it. Temporarily
2873 // enable this assertion if you are chasing a different kind of
2874 // bug.
2875 //
2876 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2877 // receiver->is_being_ext_suspended(), "thread is not suspended");
2878 }
2879 JVM_END
2880
2881
2882 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2883 JVMWrapper("JVM_ResumeThread");
2884 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2885 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2886 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2887 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2888 // looks at it.
2889 MutexLocker ml(Threads_lock);
2890 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2891 if (thr != NULL) {
2892 // the thread has run and is not in the process of exiting
2893 thr->java_resume();
2894 }
2895 JVM_END
2896
2897
2898 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2899 JVMWrapper("JVM_SetThreadPriority");
2900 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2901 MutexLocker ml(Threads_lock);
2902 oop java_thread = JNIHandles::resolve_non_null(jthread);
2903 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2904 JavaThread* thr = java_lang_Thread::thread(java_thread);
2905 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2906 Thread::set_priority(thr, (ThreadPriority)prio);
2907 }
2908 JVM_END
2909
2910
2911 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2912 JVMWrapper("JVM_Yield");
2913 if (os::dont_yield()) return;
2914 HOTSPOT_THREAD_YIELD();
2915
2916 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2917 // Critical for similar threading behaviour
2918 if (ConvertYieldToSleep) {
2919 os::sleep(thread, MinSleepInterval, false);
2920 } else {
2921 os::naked_yield();
2922 }
2923 JVM_END
2924
2925
2926 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2927 JVMWrapper("JVM_Sleep");
2928
2929 if (millis < 0) {
2930 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2931 }
2932
2933 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2934 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2935 }
2936
2937 // Save current thread state and restore it at the end of this block.
2938 // And set new thread state to SLEEPING.
2939 JavaThreadSleepState jtss(thread);
2940
2941 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2942
2943 EventThreadSleep event;
2944
2945 if (millis == 0) {
2946 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2947 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2948 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2949 // for SOLARIS
2950 if (ConvertSleepToYield) {
2951 os::naked_yield();
2952 } else {
2953 ThreadState old_state = thread->osthread()->get_state();
2954 thread->osthread()->set_state(SLEEPING);
2955 os::sleep(thread, MinSleepInterval, false);
2956 thread->osthread()->set_state(old_state);
2957 }
2958 } else {
2959 ThreadState old_state = thread->osthread()->get_state();
2960 thread->osthread()->set_state(SLEEPING);
2961 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2962 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2963 // us while we were sleeping. We do not overwrite those.
2964 if (!HAS_PENDING_EXCEPTION) {
2965 if (event.should_commit()) {
2966 event.set_time(millis);
2967 event.commit();
2968 }
2969 HOTSPOT_THREAD_SLEEP_END(1);
2970
2971 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2972 // to properly restore the thread state. That's likely wrong.
2973 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2974 }
2975 }
2976 thread->osthread()->set_state(old_state);
2977 }
2978 if (event.should_commit()) {
2979 event.set_time(millis);
2980 event.commit();
2981 }
2982 HOTSPOT_THREAD_SLEEP_END(0);
2983 JVM_END
2984
2985 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2986 JVMWrapper("JVM_CurrentThread");
2987 oop jthread = thread->threadObj();
2988 assert (thread != NULL, "no current thread!");
2989 return JNIHandles::make_local(env, jthread);
2990 JVM_END
2991
2992
2993 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2994 JVMWrapper("JVM_CountStackFrames");
2995
2996 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2997 oop java_thread = JNIHandles::resolve_non_null(jthread);
2998 bool throw_illegal_thread_state = false;
2999 int count = 0;
3000
3001 {
3002 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3003 // We need to re-resolve the java_thread, since a GC might have happened during the
3004 // acquire of the lock
3005 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3006
3007 if (thr == NULL) {
3008 // do nothing
3009 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3010 // Check whether this java thread has been suspended already. If not, throws
3011 // IllegalThreadStateException. We defer to throw that exception until
3012 // Threads_lock is released since loading exception class has to leave VM.
3013 // The correct way to test a thread is actually suspended is
3014 // wait_for_ext_suspend_completion(), but we can't call that while holding
3015 // the Threads_lock. The above tests are sufficient for our purposes
3016 // provided the walkability of the stack is stable - which it isn't
3017 // 100% but close enough for most practical purposes.
3018 throw_illegal_thread_state = true;
3019 } else {
3020 // Count all java activation, i.e., number of vframes
3021 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3022 // Native frames are not counted
3023 if (!vfst.method()->is_native()) count++;
3024 }
3025 }
3026 }
3027
3028 if (throw_illegal_thread_state) {
3029 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3030 "this thread is not suspended");
3031 }
3032 return count;
3033 JVM_END
3034
3035 // Consider: A better way to implement JVM_Interrupt() is to acquire
3036 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3037 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3038 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3039 // outside the critical section. Threads_lock is hot so we want to minimize
3040 // the hold-time. A cleaner interface would be to decompose interrupt into
3041 // two steps. The 1st phase, performed under Threads_lock, would return
3042 // a closure that'd be invoked after Threads_lock was dropped.
3043 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3044 // admit spurious wakeups.
3045
3046 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3047 JVMWrapper("JVM_Interrupt");
3048
3049 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3050 oop java_thread = JNIHandles::resolve_non_null(jthread);
3051 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3052 // We need to re-resolve the java_thread, since a GC might have happened during the
3053 // acquire of the lock
3054 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3055 if (thr != NULL) {
3056 Thread::interrupt(thr);
3057 }
3058 JVM_END
3059
3060
3061 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3062 JVMWrapper("JVM_IsInterrupted");
3063
3064 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3065 oop java_thread = JNIHandles::resolve_non_null(jthread);
3066 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3067 // We need to re-resolve the java_thread, since a GC might have happened during the
3068 // acquire of the lock
3069 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3070 if (thr == NULL) {
3071 return JNI_FALSE;
3072 } else {
3073 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3074 }
3075 JVM_END
3076
3077
3078 // Return true iff the current thread has locked the object passed in
3079
3080 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3081 JVMWrapper("JVM_HoldsLock");
3082 assert(THREAD->is_Java_thread(), "sanity check");
3083 if (obj == NULL) {
3084 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3085 }
3086 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3087 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3088 JVM_END
3089
3090
3091 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3092 JVMWrapper("JVM_DumpAllStacks");
3093 VM_PrintThreads op;
3094 VMThread::execute(&op);
3095 if (JvmtiExport::should_post_data_dump()) {
3096 JvmtiExport::post_data_dump();
3097 }
3098 JVM_END
3099
3100 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3101 JVMWrapper("JVM_SetNativeThreadName");
3102 ResourceMark rm(THREAD);
3103 oop java_thread = JNIHandles::resolve_non_null(jthread);
3104 JavaThread* thr = java_lang_Thread::thread(java_thread);
3105 // Thread naming only supported for the current thread, doesn't work for
3106 // target threads.
3107 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3108 // we don't set the name of an attached thread to avoid stepping
3109 // on other programs
3110 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3111 os::set_native_thread_name(thread_name);
3112 }
3113 JVM_END
3114
3115 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3116
3117 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3118 assert(jthread->is_Java_thread(), "must be a Java thread");
3119 if (jthread->privileged_stack_top() == NULL) return false;
3120 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3121 oop loader = jthread->privileged_stack_top()->class_loader();
3122 if (loader == NULL) return true;
3123 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3124 if (trusted) return true;
3125 }
3126 return false;
3127 }
3128
3129 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3130 JVMWrapper("JVM_CurrentLoadedClass");
3131 ResourceMark rm(THREAD);
3132
3133 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3134 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3135 bool trusted = is_trusted_frame(thread, &vfst);
3136 if (trusted) return NULL;
3137
3138 Method* m = vfst.method();
3139 if (!m->is_native()) {
3140 InstanceKlass* holder = m->method_holder();
3141 oop loader = holder->class_loader();
3142 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3143 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3144 }
3145 }
3146 }
3147 return NULL;
3148 JVM_END
3149
3150
3151 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3152 JVMWrapper("JVM_CurrentClassLoader");
3153 ResourceMark rm(THREAD);
3154
3155 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3156
3157 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3158 bool trusted = is_trusted_frame(thread, &vfst);
3159 if (trusted) return NULL;
3160
3161 Method* m = vfst.method();
3162 if (!m->is_native()) {
3163 InstanceKlass* holder = m->method_holder();
3164 assert(holder->is_klass(), "just checking");
3165 oop loader = holder->class_loader();
3166 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3167 return JNIHandles::make_local(env, loader);
3168 }
3169 }
3170 }
3171 return NULL;
3172 JVM_END
3173
3174
3175 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3176 JVMWrapper("JVM_GetClassContext");
3177 ResourceMark rm(THREAD);
3178 JvmtiVMObjectAllocEventCollector oam;
3179 vframeStream vfst(thread);
3180
3181 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3182 // This must only be called from SecurityManager.getClassContext
3183 Method* m = vfst.method();
3184 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3185 m->name() == vmSymbols::getClassContext_name() &&
3186 m->signature() == vmSymbols::void_class_array_signature())) {
3187 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3188 }
3189 }
3190
3191 // Collect method holders
3192 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3193 for (; !vfst.at_end(); vfst.security_next()) {
3194 Method* m = vfst.method();
3195 // Native frames are not returned
3196 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3197 Klass* holder = m->method_holder();
3198 assert(holder->is_klass(), "just checking");
3199 klass_array->append(holder);
3200 }
3201 }
3202
3203 // Create result array of type [Ljava/lang/Class;
3204 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3205 // Fill in mirrors corresponding to method holders
3206 for (int i = 0; i < klass_array->length(); i++) {
3207 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3208 }
3209
3210 return (jobjectArray) JNIHandles::make_local(env, result);
3211 JVM_END
3212
3213
3214 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3215 JVMWrapper("JVM_ClassDepth");
3216 ResourceMark rm(THREAD);
3217 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3218 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3219
3220 const char* str = java_lang_String::as_utf8_string(class_name_str());
3221 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3222 if (class_name_sym == NULL) {
3223 return -1;
3224 }
3225
3226 int depth = 0;
3227
3228 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3229 if (!vfst.method()->is_native()) {
3230 InstanceKlass* holder = vfst.method()->method_holder();
3231 assert(holder->is_klass(), "just checking");
3232 if (holder->name() == class_name_sym) {
3233 return depth;
3234 }
3235 depth++;
3236 }
3237 }
3238 return -1;
3239 JVM_END
3240
3241
3242 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3243 JVMWrapper("JVM_ClassLoaderDepth");
3244 ResourceMark rm(THREAD);
3245 int depth = 0;
3246 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3247 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3248 bool trusted = is_trusted_frame(thread, &vfst);
3249 if (trusted) return -1;
3250
3251 Method* m = vfst.method();
3252 if (!m->is_native()) {
3253 InstanceKlass* holder = m->method_holder();
3254 assert(holder->is_klass(), "just checking");
3255 oop loader = holder->class_loader();
3256 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3257 return depth;
3258 }
3259 depth++;
3260 }
3261 }
3262 return -1;
3263 JVM_END
3264
3265
3266 // java.lang.Package ////////////////////////////////////////////////////////////////
3267
3268
3269 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3270 JVMWrapper("JVM_GetSystemPackage");
3271 ResourceMark rm(THREAD);
3272 JvmtiVMObjectAllocEventCollector oam;
3273 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3274 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3275 return (jstring) JNIHandles::make_local(result);
3276 JVM_END
3277
3278
3279 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3280 JVMWrapper("JVM_GetSystemPackages");
3281 JvmtiVMObjectAllocEventCollector oam;
3282 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3283 return (jobjectArray) JNIHandles::make_local(result);
3284 JVM_END
3285
3286
3287 // ObjectInputStream ///////////////////////////////////////////////////////////////
3288
3289 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3290 if (current_class == NULL) {
3291 return true;
3292 }
3293 if ((current_class == field_class) || access.is_public()) {
3294 return true;
3295 }
3296
3297 if (access.is_protected()) {
3298 // See if current_class is a subclass of field_class
3299 if (current_class->is_subclass_of(field_class)) {
3300 return true;
3301 }
3302 }
3303
3304 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3305 }
3306
3307 // Return the first non-null class loader up the execution stack, or null
3308 // if only code from the null class loader is on the stack.
3309
3310 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3311 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3312 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3313 oop loader = vfst.method()->method_holder()->class_loader();
3314 if (loader != NULL) {
3315 return JNIHandles::make_local(env, loader);
3316 }
3317 }
3318 return NULL;
3319 JVM_END
3320
3321
3322 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3323
3324
3325 // resolve array handle and check arguments
3326 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3327 if (arr == NULL) {
3328 THROW_0(vmSymbols::java_lang_NullPointerException());
3329 }
3330 oop a = JNIHandles::resolve_non_null(arr);
3331 if (!a->is_array()) {
3332 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3333 } else if (type_array_only && !a->is_typeArray()) {
3334 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3335 }
3336 return arrayOop(a);
3337 }
3338
3339
3340 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3341 JVMWrapper("JVM_GetArrayLength");
3342 arrayOop a = check_array(env, arr, false, CHECK_0);
3343 return a->length();
3344 JVM_END
3345
3346
3347 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3348 JVMWrapper("JVM_Array_Get");
3349 JvmtiVMObjectAllocEventCollector oam;
3350 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3351 jvalue value;
3352 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3353 oop box = Reflection::box(&value, type, CHECK_NULL);
3354 return JNIHandles::make_local(env, box);
3355 JVM_END
3356
3357
3358 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3359 JVMWrapper("JVM_GetPrimitiveArrayElement");
3360 jvalue value;
3361 value.i = 0; // to initialize value before getting used in CHECK
3362 arrayOop a = check_array(env, arr, true, CHECK_(value));
3363 assert(a->is_typeArray(), "just checking");
3364 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3365 BasicType wide_type = (BasicType) wCode;
3366 if (type != wide_type) {
3367 Reflection::widen(&value, type, wide_type, CHECK_(value));
3368 }
3369 return value;
3370 JVM_END
3371
3372
3373 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3374 JVMWrapper("JVM_SetArrayElement");
3375 arrayOop a = check_array(env, arr, false, CHECK);
3376 oop box = JNIHandles::resolve(val);
3377 jvalue value;
3378 value.i = 0; // to initialize value before getting used in CHECK
3379 BasicType value_type;
3380 if (a->is_objArray()) {
3381 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3382 value_type = Reflection::unbox_for_regular_object(box, &value);
3383 } else {
3384 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3385 }
3386 Reflection::array_set(&value, a, index, value_type, CHECK);
3387 JVM_END
3388
3389
3390 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3391 JVMWrapper("JVM_SetPrimitiveArrayElement");
3392 arrayOop a = check_array(env, arr, true, CHECK);
3393 assert(a->is_typeArray(), "just checking");
3394 BasicType value_type = (BasicType) vCode;
3395 Reflection::array_set(&v, a, index, value_type, CHECK);
3396 JVM_END
3397
3398
3399 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3400 JVMWrapper("JVM_NewArray");
3401 JvmtiVMObjectAllocEventCollector oam;
3402 oop element_mirror = JNIHandles::resolve(eltClass);
3403 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3404 return JNIHandles::make_local(env, result);
3405 JVM_END
3406
3407
3408 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3409 JVMWrapper("JVM_NewMultiArray");
3410 JvmtiVMObjectAllocEventCollector oam;
3411 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3412 oop element_mirror = JNIHandles::resolve(eltClass);
3413 assert(dim_array->is_typeArray(), "just checking");
3414 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3415 return JNIHandles::make_local(env, result);
3416 JVM_END
3417
3418
3419 // Library support ///////////////////////////////////////////////////////////////////////////
3420
3421 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3422 //%note jvm_ct
3423 JVMWrapper("JVM_LoadLibrary");
3424 char ebuf[1024];
3425 void *load_result;
3426 {
3427 ThreadToNativeFromVM ttnfvm(thread);
3428 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3429 }
3430 if (load_result == NULL) {
3431 char msg[1024];
3432 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3433 // Since 'ebuf' may contain a string encoded using
3434 // platform encoding scheme, we need to pass
3435 // Exceptions::unsafe_to_utf8 to the new_exception method
3436 // as the last argument. See bug 6367357.
3437 Handle h_exception =
3438 Exceptions::new_exception(thread,
3439 vmSymbols::java_lang_UnsatisfiedLinkError(),
3440 msg, Exceptions::unsafe_to_utf8);
3441
3442 THROW_HANDLE_0(h_exception);
3443 }
3444 return load_result;
3445 JVM_END
3446
3447
3448 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3449 JVMWrapper("JVM_UnloadLibrary");
3450 os::dll_unload(handle);
3451 JVM_END
3452
3453
3454 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3455 JVMWrapper("JVM_FindLibraryEntry");
3456 return os::dll_lookup(handle, name);
3457 JVM_END
3458
3459
3460 // JNI version ///////////////////////////////////////////////////////////////////////////////
3461
3462 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3463 JVMWrapper("JVM_IsSupportedJNIVersion");
3464 return Threads::is_supported_jni_version_including_1_1(version);
3465 JVM_END
3466
3467
3468 // String support ///////////////////////////////////////////////////////////////////////////
3469
3470 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3471 JVMWrapper("JVM_InternString");
3472 JvmtiVMObjectAllocEventCollector oam;
3473 if (str == NULL) return NULL;
3474 oop string = JNIHandles::resolve_non_null(str);
3475 oop result = StringTable::intern(string, CHECK_NULL);
3476 return (jstring) JNIHandles::make_local(env, result);
3477 JVM_END
3478
3479
3480 // Raw monitor support //////////////////////////////////////////////////////////////////////
3481
3482 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3483 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3484 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3485 // that only works with java threads.
3486
3487
3488 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3489 VM_Exit::block_if_vm_exited();
3490 JVMWrapper("JVM_RawMonitorCreate");
3491 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3492 }
3493
3494
3495 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3496 VM_Exit::block_if_vm_exited();
3497 JVMWrapper("JVM_RawMonitorDestroy");
3498 delete ((Mutex*) mon);
3499 }
3500
3501
3502 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3503 VM_Exit::block_if_vm_exited();
3504 JVMWrapper("JVM_RawMonitorEnter");
3505 ((Mutex*) mon)->jvm_raw_lock();
3506 return 0;
3507 }
3508
3509
3510 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3511 VM_Exit::block_if_vm_exited();
3512 JVMWrapper("JVM_RawMonitorExit");
3513 ((Mutex*) mon)->jvm_raw_unlock();
3514 }
3515
3516
3517 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3518
3519 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3520 Handle loader, Handle protection_domain,
3521 jboolean throwError, TRAPS) {
3522 // Security Note:
3523 // The Java level wrapper will perform the necessary security check allowing
3524 // us to pass the NULL as the initiating class loader. The VM is responsible for
3525 // the checkPackageAccess relative to the initiating class loader via the
3526 // protection_domain. The protection_domain is passed as NULL by the java code
3527 // if there is no security manager in 3-arg Class.forName().
3528 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3529
3530 KlassHandle klass_handle(THREAD, klass);
3531 // Check if we should initialize the class
3532 if (init && klass_handle->is_instance_klass()) {
3533 klass_handle->initialize(CHECK_NULL);
3534 }
3535 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3536 }
3537
3538
3539 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3540
3541 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3542 JVMWrapper("JVM_InvokeMethod");
3543 Handle method_handle;
3544 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3545 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3546 Handle receiver(THREAD, JNIHandles::resolve(obj));
3547 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3548 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3549 jobject res = JNIHandles::make_local(env, result);
3550 if (JvmtiExport::should_post_vm_object_alloc()) {
3551 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3552 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3553 if (java_lang_Class::is_primitive(ret_type)) {
3554 // Only for primitive type vm allocates memory for java object.
3555 // See box() method.
3556 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3557 }
3558 }
3559 return res;
3560 } else {
3561 THROW_0(vmSymbols::java_lang_StackOverflowError());
3562 }
3563 JVM_END
3564
3565
3566 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3567 JVMWrapper("JVM_NewInstanceFromConstructor");
3568 oop constructor_mirror = JNIHandles::resolve(c);
3569 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3570 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3571 jobject res = JNIHandles::make_local(env, result);
3572 if (JvmtiExport::should_post_vm_object_alloc()) {
3573 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3574 }
3575 return res;
3576 JVM_END
3577
3578 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3579
3580 JVM_LEAF(jboolean, JVM_SupportsCX8())
3581 JVMWrapper("JVM_SupportsCX8");
3582 return VM_Version::supports_cx8();
3583 JVM_END
3584
3585 // Returns an array of all live Thread objects (VM internal JavaThreads,
3586 // jvmti agent threads, and JNI attaching threads are skipped)
3587 // See CR 6404306 regarding JNI attaching threads
3588 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3589 ResourceMark rm(THREAD);
3590 ThreadsListEnumerator tle(THREAD, false, false);
3591 JvmtiVMObjectAllocEventCollector oam;
3592
3593 int num_threads = tle.num_threads();
3594 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3595 objArrayHandle threads_ah(THREAD, r);
3596
3597 for (int i = 0; i < num_threads; i++) {
3598 Handle h = tle.get_threadObj(i);
3599 threads_ah->obj_at_put(i, h());
3600 }
3601
3602 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3603 JVM_END
3604
3605
3606 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3607 // Return StackTraceElement[][], each element is the stack trace of a thread in
3608 // the corresponding entry in the given threads array
3609 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3610 JVMWrapper("JVM_DumpThreads");
3611 JvmtiVMObjectAllocEventCollector oam;
3612
3613 // Check if threads is null
3614 if (threads == NULL) {
3615 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3616 }
3617
3618 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3619 objArrayHandle ah(THREAD, a);
3620 int num_threads = ah->length();
3621 // check if threads is non-empty array
3622 if (num_threads == 0) {
3623 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3624 }
3625
3626 // check if threads is not an array of objects of Thread class
3627 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3628 if (k != SystemDictionary::Thread_klass()) {
3629 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3630 }
3631
3632 ResourceMark rm(THREAD);
3633
3634 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3635 for (int i = 0; i < num_threads; i++) {
3636 oop thread_obj = ah->obj_at(i);
3637 instanceHandle h(THREAD, (instanceOop) thread_obj);
3638 thread_handle_array->append(h);
3639 }
3640
3641 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3642 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3643
3644 JVM_END
3645
3646 // JVM monitoring and management support
3647 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3648 return Management::get_jmm_interface(version);
3649 JVM_END
3650
3651 // com.sun.tools.attach.VirtualMachine agent properties support
3652 //
3653 // Initialize the agent properties with the properties maintained in the VM
3654 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3655 JVMWrapper("JVM_InitAgentProperties");
3656 ResourceMark rm;
3657
3658 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3659
3660 PUTPROP(props, "sun.java.command", Arguments::java_command());
3661 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3662 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3663 return properties;
3664 JVM_END
3665
3666 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3667 {
3668 JVMWrapper("JVM_GetEnclosingMethodInfo");
3669 JvmtiVMObjectAllocEventCollector oam;
3670
3671 if (ofClass == NULL) {
3672 return NULL;
3673 }
3674 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3675 // Special handling for primitive objects
3676 if (java_lang_Class::is_primitive(mirror())) {
3677 return NULL;
3678 }
3679 Klass* k = java_lang_Class::as_Klass(mirror());
3680 if (!k->is_instance_klass()) {
3681 return NULL;
3682 }
3683 instanceKlassHandle ik_h(THREAD, k);
3684 int encl_method_class_idx = ik_h->enclosing_method_class_index();
3685 if (encl_method_class_idx == 0) {
3686 return NULL;
3687 }
3688 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3689 objArrayHandle dest(THREAD, dest_o);
3690 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3691 dest->obj_at_put(0, enc_k->java_mirror());
3692 int encl_method_method_idx = ik_h->enclosing_method_method_index();
3693 if (encl_method_method_idx != 0) {
3694 Symbol* sym = ik_h->constants()->symbol_at(
3695 extract_low_short_from_int(
3696 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3697 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3698 dest->obj_at_put(1, str());
3699 sym = ik_h->constants()->symbol_at(
3700 extract_high_short_from_int(
3701 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3702 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3703 dest->obj_at_put(2, str());
3704 }
3705 return (jobjectArray) JNIHandles::make_local(dest());
3706 }
3707 JVM_END
3708
3709 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3710 {
3711 memset(info, 0, info_size);
3712
3713 info->jvm_version = Abstract_VM_Version::jvm_version();
3714 info->update_version = 0; /* 0 in HotSpot Express VM */
3715 info->special_update_version = 0; /* 0 in HotSpot Express VM */
3716
3717 // when we add a new capability in the jvm_version_info struct, we should also
3718 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3719 // counter defined in runtimeService.cpp.
3720 info->is_attachable = AttachListener::is_attach_supported();
3721 }
3722 JVM_END