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 class JVMTraceWrapper : public StackObj {
228 public:
229 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
230 if (TraceJVMCalls) {
231 va_list ap;
232 va_start(ap, format);
233 tty->print("JVM ");
234 tty->vprint_cr(format, ap);
235 va_end(ap);
236 }
237 }
238 };
239
240 Histogram* JVMHistogram;
241 volatile jint JVMHistogram_lock = 0;
242
243 class JVMHistogramElement : public HistogramElement {
244 public:
245 JVMHistogramElement(const char* name);
246 };
247
248 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
249 _name = elementName;
250 uintx count = 0;
251
252 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
253 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
254 count +=1;
255 if ( (WarnOnStalledSpinLock > 0)
256 && (count % WarnOnStalledSpinLock == 0)) {
257 warning("JVMHistogram_lock seems to be stalled");
258 }
259 }
260 }
261
262 if(JVMHistogram == NULL)
263 JVMHistogram = new Histogram("JVM Call Counts",100);
264
265 JVMHistogram->add_element(this);
266 Atomic::dec(&JVMHistogram_lock);
267 }
268
269 #define JVMCountWrapper(arg) \
270 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
271 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
272
273 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
274 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
275 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
276 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
277 #else
278 #define JVMWrapper(arg1)
279 #define JVMWrapper2(arg1, arg2)
280 #define JVMWrapper3(arg1, arg2, arg3)
281 #define JVMWrapper4(arg1, arg2, arg3, arg4)
282 #endif
283
284
285 // Interface version /////////////////////////////////////////////////////////////////////
286
287
288 JVM_LEAF(jint, JVM_GetInterfaceVersion())
289 return JVM_INTERFACE_VERSION;
290 JVM_END
291
292
293 // java.lang.System //////////////////////////////////////////////////////////////////////
294
295
296 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
297 JVMWrapper("JVM_CurrentTimeMillis");
298 return os::javaTimeMillis();
299 JVM_END
300
301 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
302 JVMWrapper("JVM_NanoTime");
303 return os::javaTimeNanos();
304 JVM_END
305
306 // The function below is actually exposed by sun.misc.VM and not
307 // java.lang.System, but we choose to keep it here so that it stays next
308 // to JVM_CurrentTimeMillis and JVM_NanoTime
309
310 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
311 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
312
313 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
314 JVMWrapper("JVM_GetNanoTimeAdjustment");
315 jlong seconds;
316 jlong nanos;
317
318 os::javaTimeSystemUTC(seconds, nanos);
319
320 // We're going to verify that the result can fit in a long.
321 // For that we need the difference in seconds between 'seconds'
322 // and 'offset_secs' to be such that:
323 // |seconds - offset_secs| < (2^63/10^9)
324 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
325 // which makes |seconds - offset_secs| < 2^33
326 // and we will prefer +/- 2^32 as the maximum acceptable diff
327 // as 2^32 has a more natural feel than 2^33...
328 //
329 // So if |seconds - offset_secs| >= 2^32 - we return a special
330 // sentinel value (-1) which the caller should take as an
331 // exception value indicating that the offset given to us is
332 // too far from range of the current time - leading to too big
333 // a nano adjustment. The caller is expected to recover by
334 // computing a more accurate offset and calling this method
335 // again. (For the record 2^32 secs is ~136 years, so that
336 // should rarely happen)
337 //
338 jlong diff = seconds - offset_secs;
339 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
340 return -1; // sentinel value: the offset is too far off the target
341 }
342
343 // return the adjustment. If you compute a time by adding
344 // this number of nanoseconds along with the number of seconds
345 // in the offset you should get the current UTC time.
346 return (diff * (jlong)1000000000) + nanos;
347 JVM_END
348
349 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
350 jobject dst, jint dst_pos, jint length))
351 JVMWrapper("JVM_ArrayCopy");
352 // Check if we have null pointers
353 if (src == NULL || dst == NULL) {
354 THROW(vmSymbols::java_lang_NullPointerException());
355 }
356 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
357 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
358 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
359 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
360 // Do copy
361 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
362 JVM_END
363
364
365 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
366 JavaValue r(T_OBJECT);
367 // public synchronized Object put(Object key, Object value);
368 HandleMark hm(THREAD);
369 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
370 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
371 JavaCalls::call_virtual(&r,
372 props,
373 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
374 vmSymbols::put_name(),
375 vmSymbols::object_object_object_signature(),
376 key_str,
377 value_str,
378 THREAD);
379 }
380
381
382 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
383
384
385 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
386 JVMWrapper("JVM_InitProperties");
387 ResourceMark rm;
388
389 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
390
391 // System property list includes both user set via -D option and
392 // jvm system specific properties.
393 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
394 PUTPROP(props, p->key(), p->value());
395 }
396
397 // Convert the -XX:MaxDirectMemorySize= command line flag
398 // to the sun.nio.MaxDirectMemorySize property.
399 // Do this after setting user properties to prevent people
400 // from setting the value with a -D option, as requested.
401 {
402 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
403 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
404 } else {
405 char as_chars[256];
406 jio_snprintf(as_chars, sizeof(as_chars), SIZE_FORMAT, MaxDirectMemorySize);
407 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
408 }
409 }
410
411 // JVM monitoring and management support
412 // Add the sun.management.compiler property for the compiler's name
413 {
414 #undef CSIZE
415 #if defined(_LP64) || defined(_WIN64)
416 #define CSIZE "64-Bit "
417 #else
418 #define CSIZE
419 #endif // 64bit
420
421 #ifdef TIERED
422 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
423 #else
424 #if defined(COMPILER1)
425 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
426 #elif defined(COMPILER2)
427 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
428 #elif INCLUDE_JVMCI
429 #error "INCLUDE_JVMCI should imply TIERED"
430 #else
431 const char* compiler_name = "";
432 #endif // compilers
433 #endif // TIERED
434
435 if (*compiler_name != '\0' &&
436 (Arguments::mode() != Arguments::_int)) {
437 PUTPROP(props, "sun.management.compiler", compiler_name);
438 }
439 }
440
441 return properties;
442 JVM_END
443
444
445 /*
446 * Return the temporary directory that the VM uses for the attach
447 * and perf data files.
448 *
449 * It is important that this directory is well-known and the
450 * same for all VM instances. It cannot be affected by configuration
451 * variables such as java.io.tmpdir.
452 */
453 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
454 JVMWrapper("JVM_GetTemporaryDirectory");
455 HandleMark hm(THREAD);
456 const char* temp_dir = os::get_temp_directory();
457 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
458 return (jstring) JNIHandles::make_local(env, h());
459 JVM_END
460
461
462 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
463
464 extern volatile jint vm_created;
465
466 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
467 before_exit(thread);
468 vm_exit(code);
469 JVM_END
470
471
472 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
473 JVMWrapper("JVM_GC");
474 if (!DisableExplicitGC) {
475 Universe::heap()->collect(GCCause::_java_lang_system_gc);
476 }
477 JVM_END
478
479
480 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
481 JVMWrapper("JVM_MaxObjectInspectionAge");
482 return Universe::heap()->millis_since_last_gc();
483 JVM_END
484
485
486 static inline jlong convert_size_t_to_jlong(size_t val) {
487 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
488 NOT_LP64 (return (jlong)val;)
489 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
490 }
491
492 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
493 JVMWrapper("JVM_TotalMemory");
494 size_t n = Universe::heap()->capacity();
495 return convert_size_t_to_jlong(n);
496 JVM_END
497
498
499 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
500 JVMWrapper("JVM_FreeMemory");
501 CollectedHeap* ch = Universe::heap();
502 size_t n;
503 {
504 MutexLocker x(Heap_lock);
505 n = ch->capacity() - ch->used();
506 }
507 return convert_size_t_to_jlong(n);
508 JVM_END
509
510
511 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
512 JVMWrapper("JVM_MaxMemory");
513 size_t n = Universe::heap()->max_capacity();
514 return convert_size_t_to_jlong(n);
515 JVM_END
516
517
518 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
519 JVMWrapper("JVM_ActiveProcessorCount");
520 return os::active_processor_count();
521 JVM_END
522
523
524
525 // java.lang.Throwable //////////////////////////////////////////////////////
526
527
528 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
529 JVMWrapper("JVM_FillInStackTrace");
530 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
531 java_lang_Throwable::fill_in_stack_trace(exception);
532 JVM_END
533
534
535 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
536 JVMWrapper("JVM_GetStackTraceDepth");
537 oop exception = JNIHandles::resolve(throwable);
538 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
539 JVM_END
540
541
542 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
543 JVMWrapper("JVM_GetStackTraceElement");
544 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
545 oop exception = JNIHandles::resolve(throwable);
546 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
547 return JNIHandles::make_local(env, element);
548 JVM_END
549
550
551 // java.lang.StackWalker //////////////////////////////////////////////////////
552
553
554 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
555 jint skip_frames, jint frame_count, jint start_index,
556 jobjectArray classes,
557 jobjectArray frames))
558 JVMWrapper("JVM_CallStackWalk");
559 JavaThread* jt = (JavaThread*) THREAD;
560 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
561 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
562 }
563
564 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
565 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(classes));
566 objArrayHandle classes_array_h(THREAD, ca);
567
568 // frames array is null when only getting caller reference
569 objArrayOop fa = objArrayOop(JNIHandles::resolve(frames));
570 objArrayHandle frames_array_h(THREAD, fa);
571
572 int limit = start_index + frame_count;
573 if (classes_array_h->length() < limit) {
574 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
575 }
576
577 Handle result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
578 start_index, classes_array_h,
579 frames_array_h, CHECK_NULL);
580 return JNIHandles::make_local(env, result());
581 JVM_END
582
583
584 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
585 jint frame_count, jint start_index,
586 jobjectArray classes,
587 jobjectArray frames))
588 JVMWrapper("JVM_MoreStackWalk");
589 JavaThread* jt = (JavaThread*) THREAD;
590 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(classes));
591 objArrayHandle classes_array_h(THREAD, ca);
592
593 // frames array is null when only getting caller reference
594 objArrayOop fa = objArrayOop(JNIHandles::resolve(frames));
595 objArrayHandle frames_array_h(THREAD, fa);
596
597 int limit = start_index+frame_count;
598 if (classes_array_h->length() < limit) {
599 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
600 }
601
602 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
603 return StackWalk::moreFrames(stackStream_h, mode, anchor, frame_count,
604 start_index, classes_array_h,
605 frames_array_h, THREAD);
606 JVM_END
607
608 JVM_ENTRY(void, JVM_FillStackFrames(JNIEnv *env, jclass stackStream,
609 jint start_index,
610 jobjectArray frames,
611 jint from_index, jint to_index))
612 JVMWrapper("JVM_FillStackFrames");
613 if (TraceStackWalk) {
614 tty->print("JVM_FillStackFrames() start_index=%d from_index=%d to_index=%d\n",
615 start_index, from_index, to_index);
616 }
617
618 JavaThread* jt = (JavaThread*) THREAD;
619
620 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
621 objArrayHandle frames_array_h(THREAD, fa);
622
623 if (frames_array_h->length() < to_index) {
624 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array length not matched");
625 }
626
627 for (int i = from_index; i < to_index; i++) {
628 Handle stackFrame(THREAD, frames_array_h->obj_at(i));
629 java_lang_StackFrameInfo::fill_methodInfo(stackFrame, CHECK);
630 }
631 JVM_END
632
633 JVM_ENTRY(void, JVM_SetMethodInfo(JNIEnv *env, jobject frame))
634 JVMWrapper("JVM_SetMethodInfo");
635 Handle stackFrame(THREAD, JNIHandles::resolve(frame));
636 java_lang_StackFrameInfo::fill_methodInfo(stackFrame, THREAD);
637 JVM_END
638
639 // java.lang.Object ///////////////////////////////////////////////
640
641
642 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
643 JVMWrapper("JVM_IHashCode");
644 // as implemented in the classic virtual machine; return 0 if object is NULL
645 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
646 JVM_END
647
648
649 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
650 JVMWrapper("JVM_MonitorWait");
651 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
652 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
653 if (JvmtiExport::should_post_monitor_wait()) {
654 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
655
656 // The current thread already owns the monitor and it has not yet
657 // been added to the wait queue so the current thread cannot be
658 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
659 // event handler cannot accidentally consume an unpark() meant for
660 // the ParkEvent associated with this ObjectMonitor.
661 }
662 ObjectSynchronizer::wait(obj, ms, CHECK);
663 JVM_END
664
665
666 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
667 JVMWrapper("JVM_MonitorNotify");
668 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
669 ObjectSynchronizer::notify(obj, CHECK);
670 JVM_END
671
672
673 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
674 JVMWrapper("JVM_MonitorNotifyAll");
675 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
676 ObjectSynchronizer::notifyall(obj, CHECK);
677 JVM_END
678
679
680 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
681 JVMWrapper("JVM_Clone");
682 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
683 const KlassHandle klass (THREAD, obj->klass());
684 JvmtiVMObjectAllocEventCollector oam;
685
686 #ifdef ASSERT
687 // Just checking that the cloneable flag is set correct
688 if (obj->is_array()) {
689 guarantee(klass->is_cloneable(), "all arrays are cloneable");
690 } else {
691 guarantee(obj->is_instance(), "should be instanceOop");
692 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
693 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
694 }
695 #endif
696
697 // Check if class of obj supports the Cloneable interface.
698 // All arrays are considered to be cloneable (See JLS 20.1.5)
699 if (!klass->is_cloneable()) {
700 ResourceMark rm(THREAD);
701 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
702 }
703
704 // Make shallow object copy
705 const int size = obj->size();
706 oop new_obj_oop = NULL;
707 if (obj->is_array()) {
708 const int length = ((arrayOop)obj())->length();
709 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
710 } else {
711 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
712 }
713
714 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
715 // is modifying a reference field in the clonee, a non-oop-atomic copy might
716 // be suspended in the middle of copying the pointer and end up with parts
717 // of two different pointers in the field. Subsequent dereferences will crash.
718 // 4846409: an oop-copy of objects with long or double fields or arrays of same
719 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
720 // of oops. We know objects are aligned on a minimum of an jlong boundary.
721 // The same is true of StubRoutines::object_copy and the various oop_copy
722 // variants, and of the code generated by the inline_native_clone intrinsic.
723 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
724 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
725 (size_t)align_object_size(size) / HeapWordsPerLong);
726 // Clear the header
727 new_obj_oop->init_mark();
728
729 // Store check (mark entire object and let gc sort it out)
730 BarrierSet* bs = Universe::heap()->barrier_set();
731 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
732 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
733
734 Handle new_obj(THREAD, new_obj_oop);
735 // Special handling for MemberNames. Since they contain Method* metadata, they
736 // must be registered so that RedefineClasses can fix metadata contained in them.
737 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
738 java_lang_invoke_MemberName::is_method(new_obj())) {
739 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
740 // MemberName may be unresolved, so doesn't need registration until resolved.
741 if (method != NULL) {
742 methodHandle m(THREAD, method);
743 // This can safepoint and redefine method, so need both new_obj and method
744 // in a handle, for two different reasons. new_obj can move, method can be
745 // deleted if nothing is using it on the stack.
746 m->method_holder()->add_member_name(new_obj());
747 }
748 }
749
750 // Caution: this involves a java upcall, so the clone should be
751 // "gc-robust" by this stage.
752 if (klass->has_finalizer()) {
753 assert(obj->is_instance(), "should be instanceOop");
754 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
755 new_obj = Handle(THREAD, new_obj_oop);
756 }
757
758 return JNIHandles::make_local(env, new_obj());
759 JVM_END
760
761 // java.io.File ///////////////////////////////////////////////////////////////
762
763 JVM_LEAF(char*, JVM_NativePath(char* path))
764 JVMWrapper2("JVM_NativePath (%s)", path);
765 return os::native_path(path);
766 JVM_END
767
768
769 // Misc. class handling ///////////////////////////////////////////////////////////
770
771
772 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
773 JVMWrapper("JVM_GetCallerClass");
774
775 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
776 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
777 // temporarily for existing code to use until a replacement API is defined.
778 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
779 Klass* k = thread->security_get_caller_class(depth);
780 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
781 }
782
783 // Getting the class of the caller frame.
784 //
785 // The call stack at this point looks something like this:
786 //
787 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
788 // [1] [ @CallerSensitive API.method ]
789 // [.] [ (skipped intermediate frames) ]
790 // [n] [ caller ]
791 vframeStream vfst(thread);
792 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
793 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
794 Method* m = vfst.method();
795 assert(m != NULL, "sanity");
796 switch (n) {
797 case 0:
798 // This must only be called from Reflection.getCallerClass
799 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
800 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
801 }
802 // fall-through
803 case 1:
804 // Frame 0 and 1 must be caller sensitive.
805 if (!m->caller_sensitive()) {
806 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
807 }
808 break;
809 default:
810 if (!m->is_ignored_by_security_stack_walk()) {
811 // We have reached the desired frame; return the holder class.
812 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
813 }
814 break;
815 }
816 }
817 return NULL;
818 JVM_END
819
820
821 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
822 JVMWrapper("JVM_FindPrimitiveClass");
823 oop mirror = NULL;
824 BasicType t = name2type(utf);
825 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
826 mirror = Universe::java_mirror(t);
827 }
828 if (mirror == NULL) {
829 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
830 } else {
831 return (jclass) JNIHandles::make_local(env, mirror);
832 }
833 JVM_END
834
835
836 // Returns a class loaded by the bootstrap class loader; or null
837 // if not found. ClassNotFoundException is not thrown.
838 // FindClassFromBootLoader is exported to the launcher for windows.
839 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
840 const char* name))
841 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
842
843 // Java libraries should ensure that name is never null...
844 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
845 // It's impossible to create this class; the name cannot fit
846 // into the constant pool.
847 return NULL;
848 }
849
850 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
851 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
852 if (k == NULL) {
853 return NULL;
854 }
855
856 if (TraceClassResolution) {
857 trace_class_resolution(k);
858 }
859 return (jclass) JNIHandles::make_local(env, k->java_mirror());
860 JVM_END
861
862 // Find a class with this name in this loader, using the caller's protection domain.
863 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
864 jboolean init, jobject loader,
865 jclass caller))
866 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
867 // Java libraries should ensure that name is never null...
868 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
869 // It's impossible to create this class; the name cannot fit
870 // into the constant pool.
871 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
872 }
873
874 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
875
876 oop loader_oop = JNIHandles::resolve(loader);
877 oop from_class = JNIHandles::resolve(caller);
878 oop protection_domain = NULL;
879 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
880 // NPE. Put it in another way, the bootstrap class loader has all permission and
881 // thus no checkPackageAccess equivalence in the VM class loader.
882 // The caller is also passed as NULL by the java code if there is no security
883 // manager to avoid the performance cost of getting the calling class.
884 if (from_class != NULL && loader_oop != NULL) {
885 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
886 }
887
888 Handle h_loader(THREAD, loader_oop);
889 Handle h_prot(THREAD, protection_domain);
890 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
891 h_prot, false, THREAD);
892
893 if (TraceClassResolution && result != NULL) {
894 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
895 }
896 return result;
897 JVM_END
898
899 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
900 jboolean init, jclass from))
901 JVMWrapper2("JVM_FindClassFromClass %s", name);
902 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
903 // It's impossible to create this class; the name cannot fit
904 // into the constant pool.
905 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
906 }
907 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
908 oop from_class_oop = JNIHandles::resolve(from);
909 Klass* from_class = (from_class_oop == NULL)
910 ? (Klass*)NULL
911 : java_lang_Class::as_Klass(from_class_oop);
912 oop class_loader = NULL;
913 oop protection_domain = NULL;
914 if (from_class != NULL) {
915 class_loader = from_class->class_loader();
916 protection_domain = from_class->protection_domain();
917 }
918 Handle h_loader(THREAD, class_loader);
919 Handle h_prot (THREAD, protection_domain);
920 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
921 h_prot, true, thread);
922
923 if (TraceClassResolution && result != NULL) {
924 // this function is generally only used for class loading during verification.
925 ResourceMark rm;
926 oop from_mirror = JNIHandles::resolve_non_null(from);
927 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
928 const char * from_name = from_class->external_name();
929
930 oop mirror = JNIHandles::resolve_non_null(result);
931 Klass* to_class = java_lang_Class::as_Klass(mirror);
932 const char * to = to_class->external_name();
933 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
934 }
935
936 return result;
937 JVM_END
938
939 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
940 if (loader.is_null()) {
941 return;
942 }
943
944 // check whether the current caller thread holds the lock or not.
945 // If not, increment the corresponding counter
946 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
947 ObjectSynchronizer::owner_self) {
948 counter->inc();
949 }
950 }
951
952 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
953 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
954 jobject loader, const jbyte *buf,
955 jsize len, jobject pd, const char *source,
956 TRAPS) {
957 if (source == NULL) source = "__JVM_DefineClass__";
958
959 assert(THREAD->is_Java_thread(), "must be a JavaThread");
960 JavaThread* jt = (JavaThread*) THREAD;
961
962 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
963 ClassLoader::perf_define_appclass_selftime(),
964 ClassLoader::perf_define_appclasses(),
965 jt->get_thread_stat()->perf_recursion_counts_addr(),
966 jt->get_thread_stat()->perf_timers_addr(),
967 PerfClassTraceTime::DEFINE_CLASS);
968
969 if (UsePerfData) {
970 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
971 }
972
973 // Since exceptions can be thrown, class initialization can take place
974 // if name is NULL no check for class name in .class stream has to be made.
975 TempNewSymbol class_name = NULL;
976 if (name != NULL) {
977 const int str_len = (int)strlen(name);
978 if (str_len > Symbol::max_length()) {
979 // It's impossible to create this class; the name cannot fit
980 // into the constant pool.
981 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
982 }
983 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
984 }
985
986 ResourceMark rm(THREAD);
987 ClassFileStream st((u1*) buf, len, (char *)source);
988 Handle class_loader (THREAD, JNIHandles::resolve(loader));
989 if (UsePerfData) {
990 is_lock_held_by_thread(class_loader,
991 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
992 THREAD);
993 }
994 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
995 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
996 protection_domain, &st,
997 true, CHECK_NULL);
998
999 if (TraceClassResolution && k != NULL) {
1000 trace_class_resolution(k);
1001 }
1002
1003 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1004 }
1005
1006
1007 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1008 JVMWrapper2("JVM_DefineClass %s", name);
1009
1010 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
1011 JVM_END
1012
1013
1014 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1015 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1016
1017 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
1018 JVM_END
1019
1020 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1021 JVMWrapper("JVM_FindLoadedClass");
1022 ResourceMark rm(THREAD);
1023
1024 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1025 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1026
1027 const char* str = java_lang_String::as_utf8_string(string());
1028 // Sanity check, don't expect null
1029 if (str == NULL) return NULL;
1030
1031 const int str_len = (int)strlen(str);
1032 if (str_len > Symbol::max_length()) {
1033 // It's impossible to create this class; the name cannot fit
1034 // into the constant pool.
1035 return NULL;
1036 }
1037 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1038
1039 // Security Note:
1040 // The Java level wrapper will perform the necessary security check allowing
1041 // us to pass the NULL as the initiating class loader.
1042 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1043 if (UsePerfData) {
1044 is_lock_held_by_thread(h_loader,
1045 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1046 THREAD);
1047 }
1048
1049 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1050 h_loader,
1051 Handle(),
1052 CHECK_NULL);
1053 #if INCLUDE_CDS
1054 if (k == NULL) {
1055 // If the class is not already loaded, try to see if it's in the shared
1056 // archive for the current classloader (h_loader).
1057 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1058 klass_name, h_loader, CHECK_NULL);
1059 k = ik();
1060 }
1061 #endif
1062 return (k == NULL) ? NULL :
1063 (jclass) JNIHandles::make_local(env, k->java_mirror());
1064 JVM_END
1065
1066
1067 // Reflection support //////////////////////////////////////////////////////////////////////////////
1068
1069 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1070 assert (cls != NULL, "illegal class");
1071 JVMWrapper("JVM_GetClassName");
1072 JvmtiVMObjectAllocEventCollector oam;
1073 ResourceMark rm(THREAD);
1074 const char* name;
1075 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1076 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1077 } else {
1078 // Consider caching interned string in Klass
1079 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1080 assert(k->is_klass(), "just checking");
1081 name = k->external_name();
1082 }
1083 oop result = StringTable::intern((char*) name, CHECK_NULL);
1084 return (jstring) JNIHandles::make_local(env, result);
1085 JVM_END
1086
1087
1088 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1089 JVMWrapper("JVM_GetClassInterfaces");
1090 JvmtiVMObjectAllocEventCollector oam;
1091 oop mirror = JNIHandles::resolve_non_null(cls);
1092
1093 // Special handling for primitive objects
1094 if (java_lang_Class::is_primitive(mirror)) {
1095 // Primitive objects does not have any interfaces
1096 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1097 return (jobjectArray) JNIHandles::make_local(env, r);
1098 }
1099
1100 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1101 // Figure size of result array
1102 int size;
1103 if (klass->is_instance_klass()) {
1104 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1105 } else {
1106 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1107 size = 2;
1108 }
1109
1110 // Allocate result array
1111 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1112 objArrayHandle result (THREAD, r);
1113 // Fill in result
1114 if (klass->is_instance_klass()) {
1115 // Regular instance klass, fill in all local interfaces
1116 for (int index = 0; index < size; index++) {
1117 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1118 result->obj_at_put(index, k->java_mirror());
1119 }
1120 } else {
1121 // All arrays implement java.lang.Cloneable and java.io.Serializable
1122 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1123 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1124 }
1125 return (jobjectArray) JNIHandles::make_local(env, result());
1126 JVM_END
1127
1128
1129 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1130 JVMWrapper("JVM_IsInterface");
1131 oop mirror = JNIHandles::resolve_non_null(cls);
1132 if (java_lang_Class::is_primitive(mirror)) {
1133 return JNI_FALSE;
1134 }
1135 Klass* k = java_lang_Class::as_Klass(mirror);
1136 jboolean result = k->is_interface();
1137 assert(!result || k->is_instance_klass(),
1138 "all interfaces are instance types");
1139 // The compiler intrinsic for isInterface tests the
1140 // Klass::_access_flags bits in the same way.
1141 return result;
1142 JVM_END
1143
1144
1145 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1146 JVMWrapper("JVM_GetClassSigners");
1147 JvmtiVMObjectAllocEventCollector oam;
1148 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1149 // There are no signers for primitive types
1150 return NULL;
1151 }
1152
1153 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1154
1155 // If there are no signers set in the class, or if the class
1156 // is an array, return NULL.
1157 if (signers == NULL) return NULL;
1158
1159 // copy of the signers array
1160 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1161 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1162 for (int index = 0; index < signers->length(); index++) {
1163 signers_copy->obj_at_put(index, signers->obj_at(index));
1164 }
1165
1166 // return the copy
1167 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1168 JVM_END
1169
1170
1171 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1172 JVMWrapper("JVM_SetClassSigners");
1173 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1174 // This call is ignored for primitive types and arrays.
1175 // Signers are only set once, ClassLoader.java, and thus shouldn't
1176 // be called with an array. Only the bootstrap loader creates arrays.
1177 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1178 if (k->is_instance_klass()) {
1179 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1180 }
1181 }
1182 JVM_END
1183
1184
1185 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1186 JVMWrapper("JVM_GetProtectionDomain");
1187 if (JNIHandles::resolve(cls) == NULL) {
1188 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1189 }
1190
1191 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1192 // Primitive types does not have a protection domain.
1193 return NULL;
1194 }
1195
1196 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1197 return (jobject) JNIHandles::make_local(env, pd);
1198 JVM_END
1199
1200
1201 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1202 // If there is a security manager and protection domain, check the access
1203 // in the protection domain, otherwise it is authorized.
1204 if (java_lang_System::has_security_manager()) {
1205
1206 // For bootstrapping, if pd implies method isn't in the JDK, allow
1207 // this context to revert to older behavior.
1208 // In this case the isAuthorized field in AccessControlContext is also not
1209 // present.
1210 if (Universe::protection_domain_implies_method() == NULL) {
1211 return true;
1212 }
1213
1214 // Whitelist certain access control contexts
1215 if (java_security_AccessControlContext::is_authorized(context)) {
1216 return true;
1217 }
1218
1219 oop prot = klass->protection_domain();
1220 if (prot != NULL) {
1221 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1222 // in the new wrapper.
1223 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1224 Handle h_prot(THREAD, prot);
1225 JavaValue result(T_BOOLEAN);
1226 JavaCallArguments args(h_prot);
1227 JavaCalls::call(&result, m, &args, CHECK_false);
1228 return (result.get_jboolean() != 0);
1229 }
1230 }
1231 return true;
1232 }
1233
1234 // Create an AccessControlContext with a protection domain with null codesource
1235 // and null permissions - which gives no permissions.
1236 oop create_dummy_access_control_context(TRAPS) {
1237 InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1238 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1239 // Call constructor ProtectionDomain(null, null);
1240 JavaValue result(T_VOID);
1241 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1242 vmSymbols::object_initializer_name(),
1243 vmSymbols::codesource_permissioncollection_signature(),
1244 Handle(), Handle(), CHECK_NULL);
1245
1246 // new ProtectionDomain[] {pd};
1247 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1248 context->obj_at_put(0, obj());
1249
1250 // new AccessControlContext(new ProtectionDomain[] {pd})
1251 objArrayHandle h_context(THREAD, context);
1252 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1253 return acc;
1254 }
1255
1256 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1257 JVMWrapper("JVM_DoPrivileged");
1258
1259 if (action == NULL) {
1260 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1261 }
1262
1263 // Compute the frame initiating the do privileged operation and setup the privileged stack
1264 vframeStream vfst(thread);
1265 vfst.security_get_caller_frame(1);
1266
1267 if (vfst.at_end()) {
1268 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1269 }
1270
1271 Method* method = vfst.method();
1272 instanceKlassHandle klass (THREAD, method->method_holder());
1273
1274 // Check that action object understands "Object run()"
1275 Handle h_context;
1276 if (context != NULL) {
1277 h_context = Handle(THREAD, JNIHandles::resolve(context));
1278 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1279 if (!authorized) {
1280 // Create an unprivileged access control object and call it's run function
1281 // instead.
1282 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1283 h_context = Handle(THREAD, noprivs);
1284 }
1285 }
1286
1287 // Check that action object understands "Object run()"
1288 Handle object (THREAD, JNIHandles::resolve(action));
1289
1290 // get run() method
1291 Method* m_oop = object->klass()->uncached_lookup_method(
1292 vmSymbols::run_method_name(),
1293 vmSymbols::void_object_signature(),
1294 Klass::find_overpass);
1295 methodHandle m (THREAD, m_oop);
1296 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1297 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1298 }
1299
1300 // Stack allocated list of privileged stack elements
1301 PrivilegedElement pi;
1302 if (!vfst.at_end()) {
1303 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1304 thread->set_privileged_stack_top(&pi);
1305 }
1306
1307
1308 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1309 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1310 Handle pending_exception;
1311 JavaValue result(T_OBJECT);
1312 JavaCallArguments args(object);
1313 JavaCalls::call(&result, m, &args, THREAD);
1314
1315 // done with action, remove ourselves from the list
1316 if (!vfst.at_end()) {
1317 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1318 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1319 }
1320
1321 if (HAS_PENDING_EXCEPTION) {
1322 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1323 CLEAR_PENDING_EXCEPTION;
1324 // JVMTI has already reported the pending exception
1325 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1326 if (THREAD->is_Java_thread()) {
1327 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1328 }
1329 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1330 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1331 // Throw a java.security.PrivilegedActionException(Exception e) exception
1332 JavaCallArguments args(pending_exception);
1333 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1334 vmSymbols::exception_void_signature(),
1335 &args);
1336 }
1337 }
1338
1339 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1340 return JNIHandles::make_local(env, (oop) result.get_jobject());
1341 JVM_END
1342
1343
1344 // Returns the inherited_access_control_context field of the running thread.
1345 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1346 JVMWrapper("JVM_GetInheritedAccessControlContext");
1347 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1348 return JNIHandles::make_local(env, result);
1349 JVM_END
1350
1351 class RegisterArrayForGC {
1352 private:
1353 JavaThread *_thread;
1354 public:
1355 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1356 _thread = thread;
1357 _thread->register_array_for_gc(array);
1358 }
1359
1360 ~RegisterArrayForGC() {
1361 _thread->register_array_for_gc(NULL);
1362 }
1363 };
1364
1365
1366 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1367 JVMWrapper("JVM_GetStackAccessControlContext");
1368 if (!UsePrivilegedStack) return NULL;
1369
1370 ResourceMark rm(THREAD);
1371 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1372 JvmtiVMObjectAllocEventCollector oam;
1373
1374 // count the protection domains on the execution stack. We collapse
1375 // duplicate consecutive protection domains into a single one, as
1376 // well as stopping when we hit a privileged frame.
1377
1378 // Use vframeStream to iterate through Java frames
1379 vframeStream vfst(thread);
1380
1381 oop previous_protection_domain = NULL;
1382 Handle privileged_context(thread, NULL);
1383 bool is_privileged = false;
1384 oop protection_domain = NULL;
1385
1386 for(; !vfst.at_end(); vfst.next()) {
1387 // get method of frame
1388 Method* method = vfst.method();
1389 intptr_t* frame_id = vfst.frame_id();
1390
1391 // check the privileged frames to see if we have a match
1392 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1393 // this frame is privileged
1394 is_privileged = true;
1395 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1396 protection_domain = thread->privileged_stack_top()->protection_domain();
1397 } else {
1398 protection_domain = method->method_holder()->protection_domain();
1399 }
1400
1401 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1402 local_array->push(protection_domain);
1403 previous_protection_domain = protection_domain;
1404 }
1405
1406 if (is_privileged) break;
1407 }
1408
1409
1410 // either all the domains on the stack were system domains, or
1411 // we had a privileged system domain
1412 if (local_array->is_empty()) {
1413 if (is_privileged && privileged_context.is_null()) return NULL;
1414
1415 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1416 return JNIHandles::make_local(env, result);
1417 }
1418
1419 // the resource area must be registered in case of a gc
1420 RegisterArrayForGC ragc(thread, local_array);
1421 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1422 local_array->length(), CHECK_NULL);
1423 objArrayHandle h_context(thread, context);
1424 for (int index = 0; index < local_array->length(); index++) {
1425 h_context->obj_at_put(index, local_array->at(index));
1426 }
1427
1428 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1429
1430 return JNIHandles::make_local(env, result);
1431 JVM_END
1432
1433
1434 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1435 JVMWrapper("JVM_IsArrayClass");
1436 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1437 return (k != NULL) && k->is_array_klass() ? true : false;
1438 JVM_END
1439
1440
1441 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1442 JVMWrapper("JVM_IsPrimitiveClass");
1443 oop mirror = JNIHandles::resolve_non_null(cls);
1444 return (jboolean) java_lang_Class::is_primitive(mirror);
1445 JVM_END
1446
1447
1448 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1449 JVMWrapper("JVM_GetClassModifiers");
1450 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1451 // Primitive type
1452 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1453 }
1454
1455 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1456 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1457 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1458 return k->modifier_flags();
1459 JVM_END
1460
1461
1462 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1463
1464 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1465 JvmtiVMObjectAllocEventCollector oam;
1466 // ofClass is a reference to a java_lang_Class object. The mirror object
1467 // of an InstanceKlass
1468
1469 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1470 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1471 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1472 return (jobjectArray)JNIHandles::make_local(env, result);
1473 }
1474
1475 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1476 InnerClassesIterator iter(k);
1477
1478 if (iter.length() == 0) {
1479 // Neither an inner nor outer class
1480 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1481 return (jobjectArray)JNIHandles::make_local(env, result);
1482 }
1483
1484 // find inner class info
1485 constantPoolHandle cp(thread, k->constants());
1486 int length = iter.length();
1487
1488 // Allocate temp. result array
1489 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1490 objArrayHandle result (THREAD, r);
1491 int members = 0;
1492
1493 for (; !iter.done(); iter.next()) {
1494 int ioff = iter.inner_class_info_index();
1495 int ooff = iter.outer_class_info_index();
1496
1497 if (ioff != 0 && ooff != 0) {
1498 // Check to see if the name matches the class we're looking for
1499 // before attempting to find the class.
1500 if (cp->klass_name_at_matches(k, ooff)) {
1501 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1502 if (outer_klass == k()) {
1503 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1504 instanceKlassHandle inner_klass (THREAD, ik);
1505
1506 // Throws an exception if outer klass has not declared k as
1507 // an inner klass
1508 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1509
1510 result->obj_at_put(members, inner_klass->java_mirror());
1511 members++;
1512 }
1513 }
1514 }
1515 }
1516
1517 if (members != length) {
1518 // Return array of right length
1519 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1520 for(int i = 0; i < members; i++) {
1521 res->obj_at_put(i, result->obj_at(i));
1522 }
1523 return (jobjectArray)JNIHandles::make_local(env, res);
1524 }
1525
1526 return (jobjectArray)JNIHandles::make_local(env, result());
1527 JVM_END
1528
1529
1530 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1531 {
1532 // ofClass is a reference to a java_lang_Class object.
1533 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1534 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1535 return NULL;
1536 }
1537
1538 bool inner_is_member = false;
1539 Klass* outer_klass
1540 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1541 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1542 if (outer_klass == NULL) return NULL; // already a top-level class
1543 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1544 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1545 }
1546 JVM_END
1547
1548 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1549 {
1550 oop mirror = JNIHandles::resolve_non_null(cls);
1551 if (java_lang_Class::is_primitive(mirror) ||
1552 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1553 return NULL;
1554 }
1555 instanceKlassHandle k(THREAD, InstanceKlass::cast(java_lang_Class::as_Klass(mirror)));
1556 int ooff = 0, noff = 0;
1557 if (InstanceKlass::find_inner_classes_attr(k, &ooff, &noff, THREAD)) {
1558 if (noff != 0) {
1559 constantPoolHandle i_cp(thread, k->constants());
1560 Symbol* name = i_cp->symbol_at(noff);
1561 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1562 return (jstring) JNIHandles::make_local(env, str());
1563 }
1564 }
1565 return NULL;
1566 }
1567 JVM_END
1568
1569 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1570 assert (cls != NULL, "illegal class");
1571 JVMWrapper("JVM_GetClassSignature");
1572 JvmtiVMObjectAllocEventCollector oam;
1573 ResourceMark rm(THREAD);
1574 // Return null for arrays and primatives
1575 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1576 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1577 if (k->is_instance_klass()) {
1578 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1579 if (sym == NULL) return NULL;
1580 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1581 return (jstring) JNIHandles::make_local(env, str());
1582 }
1583 }
1584 return NULL;
1585 JVM_END
1586
1587
1588 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1589 assert (cls != NULL, "illegal class");
1590 JVMWrapper("JVM_GetClassAnnotations");
1591
1592 // Return null for arrays and primitives
1593 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1594 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1595 if (k->is_instance_klass()) {
1596 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1597 return (jbyteArray) JNIHandles::make_local(env, a);
1598 }
1599 }
1600 return NULL;
1601 JVM_END
1602
1603
1604 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1605 // some of this code was adapted from from jni_FromReflectedField
1606
1607 oop reflected = JNIHandles::resolve_non_null(field);
1608 oop mirror = java_lang_reflect_Field::clazz(reflected);
1609 Klass* k = java_lang_Class::as_Klass(mirror);
1610 int slot = java_lang_reflect_Field::slot(reflected);
1611 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1612
1613 KlassHandle kh(THREAD, k);
1614 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1615
1616 if (modifiers & JVM_ACC_STATIC) {
1617 // for static fields we only look in the current class
1618 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1619 assert(false, "cannot find static field");
1620 return false;
1621 }
1622 } else {
1623 // for instance fields we start with the current class and work
1624 // our way up through the superclass chain
1625 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1626 assert(false, "cannot find instance field");
1627 return false;
1628 }
1629 }
1630 return true;
1631 }
1632
1633 static Method* jvm_get_method_common(jobject method) {
1634 // some of this code was adapted from from jni_FromReflectedMethod
1635
1636 oop reflected = JNIHandles::resolve_non_null(method);
1637 oop mirror = NULL;
1638 int slot = 0;
1639
1640 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1641 mirror = java_lang_reflect_Constructor::clazz(reflected);
1642 slot = java_lang_reflect_Constructor::slot(reflected);
1643 } else {
1644 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1645 "wrong type");
1646 mirror = java_lang_reflect_Method::clazz(reflected);
1647 slot = java_lang_reflect_Method::slot(reflected);
1648 }
1649 Klass* k = java_lang_Class::as_Klass(mirror);
1650
1651 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1652 assert(m != NULL, "cannot find method");
1653 return m; // caller has to deal with NULL in product mode
1654 }
1655
1656 /* Type use annotations support (JDK 1.8) */
1657
1658 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1659 assert (cls != NULL, "illegal class");
1660 JVMWrapper("JVM_GetClassTypeAnnotations");
1661 ResourceMark rm(THREAD);
1662 // Return null for arrays and primitives
1663 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1664 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1665 if (k->is_instance_klass()) {
1666 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1667 if (type_annotations != NULL) {
1668 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1669 return (jbyteArray) JNIHandles::make_local(env, a);
1670 }
1671 }
1672 }
1673 return NULL;
1674 JVM_END
1675
1676 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1677 assert (method != NULL, "illegal method");
1678 JVMWrapper("JVM_GetMethodTypeAnnotations");
1679
1680 // method is a handle to a java.lang.reflect.Method object
1681 Method* m = jvm_get_method_common(method);
1682 if (m == NULL) {
1683 return NULL;
1684 }
1685
1686 AnnotationArray* type_annotations = m->type_annotations();
1687 if (type_annotations != NULL) {
1688 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1689 return (jbyteArray) JNIHandles::make_local(env, a);
1690 }
1691
1692 return NULL;
1693 JVM_END
1694
1695 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1696 assert (field != NULL, "illegal field");
1697 JVMWrapper("JVM_GetFieldTypeAnnotations");
1698
1699 fieldDescriptor fd;
1700 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1701 if (!gotFd) {
1702 return NULL;
1703 }
1704
1705 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1706 JVM_END
1707
1708 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1709 if (!cp->is_within_bounds(index)) {
1710 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1711 }
1712 }
1713
1714 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1715 {
1716 JVMWrapper("JVM_GetMethodParameters");
1717 // method is a handle to a java.lang.reflect.Method object
1718 Method* method_ptr = jvm_get_method_common(method);
1719 methodHandle mh (THREAD, method_ptr);
1720 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1721 const int num_params = mh->method_parameters_length();
1722
1723 if (num_params < 0) {
1724 // A -1 return value from method_parameters_length means there is no
1725 // parameter data. Return null to indicate this to the reflection
1726 // API.
1727 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1728 return (jobjectArray)NULL;
1729 } else {
1730 // Otherwise, we return something up to reflection, even if it is
1731 // a zero-length array. Why? Because in some cases this can
1732 // trigger a MalformedParametersException.
1733
1734 // make sure all the symbols are properly formatted
1735 for (int i = 0; i < num_params; i++) {
1736 MethodParametersElement* params = mh->method_parameters_start();
1737 int index = params[i].name_cp_index;
1738 bounds_check(mh->constants(), index, CHECK_NULL);
1739
1740 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1741 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1742 "Wrong type at constant pool index");
1743 }
1744
1745 }
1746
1747 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1748 objArrayHandle result (THREAD, result_oop);
1749
1750 for (int i = 0; i < num_params; i++) {
1751 MethodParametersElement* params = mh->method_parameters_start();
1752 // For a 0 index, give a NULL symbol
1753 Symbol* sym = 0 != params[i].name_cp_index ?
1754 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1755 int flags = params[i].flags;
1756 oop param = Reflection::new_parameter(reflected_method, i, sym,
1757 flags, CHECK_NULL);
1758 result->obj_at_put(i, param);
1759 }
1760 return (jobjectArray)JNIHandles::make_local(env, result());
1761 }
1762 }
1763 JVM_END
1764
1765 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1766
1767 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1768 {
1769 JVMWrapper("JVM_GetClassDeclaredFields");
1770 JvmtiVMObjectAllocEventCollector oam;
1771
1772 // Exclude primitive types and array types
1773 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1774 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1775 // Return empty array
1776 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1777 return (jobjectArray) JNIHandles::make_local(env, res);
1778 }
1779
1780 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1781 constantPoolHandle cp(THREAD, k->constants());
1782
1783 // Ensure class is linked
1784 k->link_class(CHECK_NULL);
1785
1786 // 4496456 We need to filter out java.lang.Throwable.backtrace
1787 bool skip_backtrace = false;
1788
1789 // Allocate result
1790 int num_fields;
1791
1792 if (publicOnly) {
1793 num_fields = 0;
1794 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1795 if (fs.access_flags().is_public()) ++num_fields;
1796 }
1797 } else {
1798 num_fields = k->java_fields_count();
1799
1800 if (k() == SystemDictionary::Throwable_klass()) {
1801 num_fields--;
1802 skip_backtrace = true;
1803 }
1804 }
1805
1806 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1807 objArrayHandle result (THREAD, r);
1808
1809 int out_idx = 0;
1810 fieldDescriptor fd;
1811 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1812 if (skip_backtrace) {
1813 // 4496456 skip java.lang.Throwable.backtrace
1814 int offset = fs.offset();
1815 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1816 }
1817
1818 if (!publicOnly || fs.access_flags().is_public()) {
1819 fd.reinitialize(k(), fs.index());
1820 oop field = Reflection::new_field(&fd, CHECK_NULL);
1821 result->obj_at_put(out_idx, field);
1822 ++out_idx;
1823 }
1824 }
1825 assert(out_idx == num_fields, "just checking");
1826 return (jobjectArray) JNIHandles::make_local(env, result());
1827 }
1828 JVM_END
1829
1830 static bool select_method(methodHandle method, bool want_constructor) {
1831 if (want_constructor) {
1832 return (method->is_initializer() && !method->is_static());
1833 } else {
1834 return (!method->is_initializer() && !method->is_overpass());
1835 }
1836 }
1837
1838 static jobjectArray get_class_declared_methods_helper(
1839 JNIEnv *env,
1840 jclass ofClass, jboolean publicOnly,
1841 bool want_constructor,
1842 Klass* klass, TRAPS) {
1843
1844 JvmtiVMObjectAllocEventCollector oam;
1845
1846 // Exclude primitive types and array types
1847 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1848 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1849 // Return empty array
1850 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1851 return (jobjectArray) JNIHandles::make_local(env, res);
1852 }
1853
1854 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1855
1856 // Ensure class is linked
1857 k->link_class(CHECK_NULL);
1858
1859 Array<Method*>* methods = k->methods();
1860 int methods_length = methods->length();
1861
1862 // Save original method_idnum in case of redefinition, which can change
1863 // the idnum of obsolete methods. The new method will have the same idnum
1864 // but if we refresh the methods array, the counts will be wrong.
1865 ResourceMark rm(THREAD);
1866 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1867 int num_methods = 0;
1868
1869 for (int i = 0; i < methods_length; i++) {
1870 methodHandle method(THREAD, methods->at(i));
1871 if (select_method(method, want_constructor)) {
1872 if (!publicOnly || method->is_public()) {
1873 idnums->push(method->method_idnum());
1874 ++num_methods;
1875 }
1876 }
1877 }
1878
1879 // Allocate result
1880 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1881 objArrayHandle result (THREAD, r);
1882
1883 // Now just put the methods that we selected above, but go by their idnum
1884 // in case of redefinition. The methods can be redefined at any safepoint,
1885 // so above when allocating the oop array and below when creating reflect
1886 // objects.
1887 for (int i = 0; i < num_methods; i++) {
1888 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1889 if (method.is_null()) {
1890 // Method may have been deleted and seems this API can handle null
1891 // Otherwise should probably put a method that throws NSME
1892 result->obj_at_put(i, NULL);
1893 } else {
1894 oop m;
1895 if (want_constructor) {
1896 m = Reflection::new_constructor(method, CHECK_NULL);
1897 } else {
1898 m = Reflection::new_method(method, false, CHECK_NULL);
1899 }
1900 result->obj_at_put(i, m);
1901 }
1902 }
1903
1904 return (jobjectArray) JNIHandles::make_local(env, result());
1905 }
1906
1907 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1908 {
1909 JVMWrapper("JVM_GetClassDeclaredMethods");
1910 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1911 /*want_constructor*/ false,
1912 SystemDictionary::reflect_Method_klass(), THREAD);
1913 }
1914 JVM_END
1915
1916 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1917 {
1918 JVMWrapper("JVM_GetClassDeclaredConstructors");
1919 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1920 /*want_constructor*/ true,
1921 SystemDictionary::reflect_Constructor_klass(), THREAD);
1922 }
1923 JVM_END
1924
1925 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1926 {
1927 JVMWrapper("JVM_GetClassAccessFlags");
1928 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1929 // Primitive type
1930 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1931 }
1932
1933 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1934 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1935 }
1936 JVM_END
1937
1938
1939 // Constant pool access //////////////////////////////////////////////////////////
1940
1941 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1942 {
1943 JVMWrapper("JVM_GetClassConstantPool");
1944 JvmtiVMObjectAllocEventCollector oam;
1945
1946 // Return null for primitives and arrays
1947 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1948 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1949 if (k->is_instance_klass()) {
1950 instanceKlassHandle k_h(THREAD, k);
1951 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1952 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1953 return JNIHandles::make_local(jcp());
1954 }
1955 }
1956 return NULL;
1957 }
1958 JVM_END
1959
1960
1961 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1962 {
1963 JVMWrapper("JVM_ConstantPoolGetSize");
1964 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1965 return cp->length();
1966 }
1967 JVM_END
1968
1969
1970 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1971 {
1972 JVMWrapper("JVM_ConstantPoolGetClassAt");
1973 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1974 bounds_check(cp, index, CHECK_NULL);
1975 constantTag tag = cp->tag_at(index);
1976 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1977 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1978 }
1979 Klass* k = cp->klass_at(index, CHECK_NULL);
1980 return (jclass) JNIHandles::make_local(k->java_mirror());
1981 }
1982 JVM_END
1983
1984 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1985 {
1986 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1987 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1988 bounds_check(cp, index, CHECK_NULL);
1989 constantTag tag = cp->tag_at(index);
1990 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1991 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1992 }
1993 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1994 if (k == NULL) return NULL;
1995 return (jclass) JNIHandles::make_local(k->java_mirror());
1996 }
1997 JVM_END
1998
1999 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2000 constantTag tag = cp->tag_at(index);
2001 if (!tag.is_method() && !tag.is_interface_method()) {
2002 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2003 }
2004 int klass_ref = cp->uncached_klass_ref_index_at(index);
2005 Klass* k_o;
2006 if (force_resolution) {
2007 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2008 } else {
2009 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2010 if (k_o == NULL) return NULL;
2011 }
2012 instanceKlassHandle k(THREAD, k_o);
2013 Symbol* name = cp->uncached_name_ref_at(index);
2014 Symbol* sig = cp->uncached_signature_ref_at(index);
2015 methodHandle m (THREAD, k->find_method(name, sig));
2016 if (m.is_null()) {
2017 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2018 }
2019 oop method;
2020 if (!m->is_initializer() || m->is_static()) {
2021 method = Reflection::new_method(m, true, CHECK_NULL);
2022 } else {
2023 method = Reflection::new_constructor(m, CHECK_NULL);
2024 }
2025 return JNIHandles::make_local(method);
2026 }
2027
2028 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2029 {
2030 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2031 JvmtiVMObjectAllocEventCollector oam;
2032 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2033 bounds_check(cp, index, CHECK_NULL);
2034 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2035 return res;
2036 }
2037 JVM_END
2038
2039 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2040 {
2041 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2042 JvmtiVMObjectAllocEventCollector oam;
2043 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2044 bounds_check(cp, index, CHECK_NULL);
2045 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2046 return res;
2047 }
2048 JVM_END
2049
2050 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2051 constantTag tag = cp->tag_at(index);
2052 if (!tag.is_field()) {
2053 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2054 }
2055 int klass_ref = cp->uncached_klass_ref_index_at(index);
2056 Klass* k_o;
2057 if (force_resolution) {
2058 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2059 } else {
2060 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2061 if (k_o == NULL) return NULL;
2062 }
2063 instanceKlassHandle k(THREAD, k_o);
2064 Symbol* name = cp->uncached_name_ref_at(index);
2065 Symbol* sig = cp->uncached_signature_ref_at(index);
2066 fieldDescriptor fd;
2067 Klass* target_klass = k->find_field(name, sig, &fd);
2068 if (target_klass == NULL) {
2069 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2070 }
2071 oop field = Reflection::new_field(&fd, CHECK_NULL);
2072 return JNIHandles::make_local(field);
2073 }
2074
2075 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2076 {
2077 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2078 JvmtiVMObjectAllocEventCollector oam;
2079 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2080 bounds_check(cp, index, CHECK_NULL);
2081 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2082 return res;
2083 }
2084 JVM_END
2085
2086 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2087 {
2088 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2089 JvmtiVMObjectAllocEventCollector oam;
2090 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2091 bounds_check(cp, index, CHECK_NULL);
2092 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2093 return res;
2094 }
2095 JVM_END
2096
2097 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2098 {
2099 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 constantTag tag = cp->tag_at(index);
2104 if (!tag.is_field_or_method()) {
2105 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2106 }
2107 int klass_ref = cp->uncached_klass_ref_index_at(index);
2108 Symbol* klass_name = cp->klass_name_at(klass_ref);
2109 Symbol* member_name = cp->uncached_name_ref_at(index);
2110 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2111 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2112 objArrayHandle dest(THREAD, dest_o);
2113 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2114 dest->obj_at_put(0, str());
2115 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2116 dest->obj_at_put(1, str());
2117 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2118 dest->obj_at_put(2, str());
2119 return (jobjectArray) JNIHandles::make_local(dest());
2120 }
2121 JVM_END
2122
2123 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2124 {
2125 JVMWrapper("JVM_ConstantPoolGetIntAt");
2126 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2127 bounds_check(cp, index, CHECK_0);
2128 constantTag tag = cp->tag_at(index);
2129 if (!tag.is_int()) {
2130 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2131 }
2132 return cp->int_at(index);
2133 }
2134 JVM_END
2135
2136 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2137 {
2138 JVMWrapper("JVM_ConstantPoolGetLongAt");
2139 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2140 bounds_check(cp, index, CHECK_(0L));
2141 constantTag tag = cp->tag_at(index);
2142 if (!tag.is_long()) {
2143 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2144 }
2145 return cp->long_at(index);
2146 }
2147 JVM_END
2148
2149 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2150 {
2151 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2152 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2153 bounds_check(cp, index, CHECK_(0.0f));
2154 constantTag tag = cp->tag_at(index);
2155 if (!tag.is_float()) {
2156 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2157 }
2158 return cp->float_at(index);
2159 }
2160 JVM_END
2161
2162 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2163 {
2164 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2165 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2166 bounds_check(cp, index, CHECK_(0.0));
2167 constantTag tag = cp->tag_at(index);
2168 if (!tag.is_double()) {
2169 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2170 }
2171 return cp->double_at(index);
2172 }
2173 JVM_END
2174
2175 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2176 {
2177 JVMWrapper("JVM_ConstantPoolGetStringAt");
2178 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2179 bounds_check(cp, index, CHECK_NULL);
2180 constantTag tag = cp->tag_at(index);
2181 if (!tag.is_string()) {
2182 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2183 }
2184 oop str = cp->string_at(index, CHECK_NULL);
2185 return (jstring) JNIHandles::make_local(str);
2186 }
2187 JVM_END
2188
2189 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2190 {
2191 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2192 JvmtiVMObjectAllocEventCollector oam;
2193 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2194 bounds_check(cp, index, CHECK_NULL);
2195 constantTag tag = cp->tag_at(index);
2196 if (!tag.is_symbol()) {
2197 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2198 }
2199 Symbol* sym = cp->symbol_at(index);
2200 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2201 return (jstring) JNIHandles::make_local(str());
2202 }
2203 JVM_END
2204
2205
2206 // Assertion support. //////////////////////////////////////////////////////////
2207
2208 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2209 JVMWrapper("JVM_DesiredAssertionStatus");
2210 assert(cls != NULL, "bad class");
2211
2212 oop r = JNIHandles::resolve(cls);
2213 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2214 if (java_lang_Class::is_primitive(r)) return false;
2215
2216 Klass* k = java_lang_Class::as_Klass(r);
2217 assert(k->is_instance_klass(), "must be an instance klass");
2218 if (!k->is_instance_klass()) return false;
2219
2220 ResourceMark rm(THREAD);
2221 const char* name = k->name()->as_C_string();
2222 bool system_class = k->class_loader() == NULL;
2223 return JavaAssertions::enabled(name, system_class);
2224
2225 JVM_END
2226
2227
2228 // Return a new AssertionStatusDirectives object with the fields filled in with
2229 // command-line assertion arguments (i.e., -ea, -da).
2230 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2231 JVMWrapper("JVM_AssertionStatusDirectives");
2232 JvmtiVMObjectAllocEventCollector oam;
2233 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2234 return JNIHandles::make_local(env, asd);
2235 JVM_END
2236
2237 // Verification ////////////////////////////////////////////////////////////////////////////////
2238
2239 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2240
2241 // RedefineClasses support: bug 6214132 caused verification to fail.
2242 // All functions from this section should call the jvmtiThreadSate function:
2243 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2244 // The function returns a Klass* of the _scratch_class if the verifier
2245 // was invoked in the middle of the class redefinition.
2246 // Otherwise it returns its argument value which is the _the_class Klass*.
2247 // Please, refer to the description in the jvmtiThreadSate.hpp.
2248
2249 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2250 JVMWrapper("JVM_GetClassNameUTF");
2251 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2252 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2253 return k->name()->as_utf8();
2254 JVM_END
2255
2256
2257 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2258 JVMWrapper("JVM_GetClassCPTypes");
2259 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2260 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2261 // types will have length zero if this is not an InstanceKlass
2262 // (length is determined by call to JVM_GetClassCPEntriesCount)
2263 if (k->is_instance_klass()) {
2264 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2265 for (int index = cp->length() - 1; index >= 0; index--) {
2266 constantTag tag = cp->tag_at(index);
2267 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2268 }
2269 }
2270 JVM_END
2271
2272
2273 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2274 JVMWrapper("JVM_GetClassCPEntriesCount");
2275 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2276 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2277 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2278 JVM_END
2279
2280
2281 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2282 JVMWrapper("JVM_GetClassFieldsCount");
2283 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2284 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2285 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2286 JVM_END
2287
2288
2289 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2290 JVMWrapper("JVM_GetClassMethodsCount");
2291 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2292 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2293 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2294 JVM_END
2295
2296
2297 // The following methods, used for the verifier, are never called with
2298 // array klasses, so a direct cast to InstanceKlass is safe.
2299 // Typically, these methods are called in a loop with bounds determined
2300 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2301 // zero for arrays.
2302 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2303 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2305 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2306 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2307 int length = method->checked_exceptions_length();
2308 if (length > 0) {
2309 CheckedExceptionElement* table= method->checked_exceptions_start();
2310 for (int i = 0; i < length; i++) {
2311 exceptions[i] = table[i].class_cp_index;
2312 }
2313 }
2314 JVM_END
2315
2316
2317 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2318 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2319 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2322 return method->checked_exceptions_length();
2323 JVM_END
2324
2325
2326 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2327 JVMWrapper("JVM_GetMethodIxByteCode");
2328 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2329 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2330 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2331 memcpy(code, method->code_base(), method->code_size());
2332 JVM_END
2333
2334
2335 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2336 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2337 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2338 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2339 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2340 return method->code_size();
2341 JVM_END
2342
2343
2344 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2345 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2346 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2347 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2348 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2349 ExceptionTable extable(method);
2350 entry->start_pc = extable.start_pc(entry_index);
2351 entry->end_pc = extable.end_pc(entry_index);
2352 entry->handler_pc = extable.handler_pc(entry_index);
2353 entry->catchType = extable.catch_type_index(entry_index);
2354 JVM_END
2355
2356
2357 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2358 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2359 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2360 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2361 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2362 return method->exception_table_length();
2363 JVM_END
2364
2365
2366 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2367 JVMWrapper("JVM_GetMethodIxModifiers");
2368 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2369 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2370 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2371 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2372 JVM_END
2373
2374
2375 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2376 JVMWrapper("JVM_GetFieldIxModifiers");
2377 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2378 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2379 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2380 JVM_END
2381
2382
2383 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2384 JVMWrapper("JVM_GetMethodIxLocalsCount");
2385 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2386 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2387 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2388 return method->max_locals();
2389 JVM_END
2390
2391
2392 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2393 JVMWrapper("JVM_GetMethodIxArgsSize");
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->size_of_parameters();
2398 JVM_END
2399
2400
2401 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2402 JVMWrapper("JVM_GetMethodIxMaxStack");
2403 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2404 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2405 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2406 return method->verifier_max_stack();
2407 JVM_END
2408
2409
2410 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2411 JVMWrapper("JVM_IsConstructorIx");
2412 ResourceMark rm(THREAD);
2413 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2414 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2415 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2416 return method->name() == vmSymbols::object_initializer_name();
2417 JVM_END
2418
2419
2420 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2421 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2422 ResourceMark rm(THREAD);
2423 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2424 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2425 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2426 return method->is_overpass();
2427 JVM_END
2428
2429 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2430 JVMWrapper("JVM_GetMethodIxIxUTF");
2431 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2432 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2433 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2434 return method->name()->as_utf8();
2435 JVM_END
2436
2437
2438 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2439 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2443 return method->signature()->as_utf8();
2444 JVM_END
2445
2446 /**
2447 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2448 * read entries in the constant pool. Since the old verifier always
2449 * works on a copy of the code, it will not see any rewriting that
2450 * may possibly occur in the middle of verification. So it is important
2451 * that nothing it calls tries to use the cpCache instead of the raw
2452 * constant pool, so we must use cp->uncached_x methods when appropriate.
2453 */
2454 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2455 JVMWrapper("JVM_GetCPFieldNameUTF");
2456 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2457 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2458 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2459 switch (cp->tag_at(cp_index).value()) {
2460 case JVM_CONSTANT_Fieldref:
2461 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2462 default:
2463 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2464 }
2465 ShouldNotReachHere();
2466 return NULL;
2467 JVM_END
2468
2469
2470 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2471 JVMWrapper("JVM_GetCPMethodNameUTF");
2472 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2473 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2474 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2475 switch (cp->tag_at(cp_index).value()) {
2476 case JVM_CONSTANT_InterfaceMethodref:
2477 case JVM_CONSTANT_Methodref:
2478 case JVM_CONSTANT_NameAndType: // for invokedynamic
2479 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2480 default:
2481 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2482 }
2483 ShouldNotReachHere();
2484 return NULL;
2485 JVM_END
2486
2487
2488 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2489 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2490 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2491 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2492 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2493 switch (cp->tag_at(cp_index).value()) {
2494 case JVM_CONSTANT_InterfaceMethodref:
2495 case JVM_CONSTANT_Methodref:
2496 case JVM_CONSTANT_NameAndType: // for invokedynamic
2497 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2498 default:
2499 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2500 }
2501 ShouldNotReachHere();
2502 return NULL;
2503 JVM_END
2504
2505
2506 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2507 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2508 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2509 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2510 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2511 switch (cp->tag_at(cp_index).value()) {
2512 case JVM_CONSTANT_Fieldref:
2513 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2514 default:
2515 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2516 }
2517 ShouldNotReachHere();
2518 return NULL;
2519 JVM_END
2520
2521
2522 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2523 JVMWrapper("JVM_GetCPClassNameUTF");
2524 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2525 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2526 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2527 Symbol* classname = cp->klass_name_at(cp_index);
2528 return classname->as_utf8();
2529 JVM_END
2530
2531
2532 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2533 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2534 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2535 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2536 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2537 switch (cp->tag_at(cp_index).value()) {
2538 case JVM_CONSTANT_Fieldref: {
2539 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2540 Symbol* classname = cp->klass_name_at(class_index);
2541 return classname->as_utf8();
2542 }
2543 default:
2544 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2545 }
2546 ShouldNotReachHere();
2547 return NULL;
2548 JVM_END
2549
2550
2551 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2552 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2553 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2554 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2555 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2556 switch (cp->tag_at(cp_index).value()) {
2557 case JVM_CONSTANT_Methodref:
2558 case JVM_CONSTANT_InterfaceMethodref: {
2559 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2560 Symbol* classname = cp->klass_name_at(class_index);
2561 return classname->as_utf8();
2562 }
2563 default:
2564 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2565 }
2566 ShouldNotReachHere();
2567 return NULL;
2568 JVM_END
2569
2570
2571 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2572 JVMWrapper("JVM_GetCPFieldModifiers");
2573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2579 switch (cp->tag_at(cp_index).value()) {
2580 case JVM_CONSTANT_Fieldref: {
2581 Symbol* name = cp->uncached_name_ref_at(cp_index);
2582 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2583 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2584 if (fs.name() == name && fs.signature() == signature) {
2585 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2586 }
2587 }
2588 return -1;
2589 }
2590 default:
2591 fatal("JVM_GetCPFieldModifiers: illegal constant");
2592 }
2593 ShouldNotReachHere();
2594 return 0;
2595 JVM_END
2596
2597
2598 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2599 JVMWrapper("JVM_GetCPMethodModifiers");
2600 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2601 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2602 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2603 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2604 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2605 switch (cp->tag_at(cp_index).value()) {
2606 case JVM_CONSTANT_Methodref:
2607 case JVM_CONSTANT_InterfaceMethodref: {
2608 Symbol* name = cp->uncached_name_ref_at(cp_index);
2609 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2610 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2611 int methods_count = methods->length();
2612 for (int i = 0; i < methods_count; i++) {
2613 Method* method = methods->at(i);
2614 if (method->name() == name && method->signature() == signature) {
2615 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2616 }
2617 }
2618 return -1;
2619 }
2620 default:
2621 fatal("JVM_GetCPMethodModifiers: illegal constant");
2622 }
2623 ShouldNotReachHere();
2624 return 0;
2625 JVM_END
2626
2627
2628 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2629
2630 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2631 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2632 JVM_END
2633
2634
2635 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2636 JVMWrapper("JVM_IsSameClassPackage");
2637 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2638 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2639 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2640 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2641 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2642 JVM_END
2643
2644 // Printing support //////////////////////////////////////////////////
2645 extern "C" {
2646
2647 ATTRIBUTE_PRINTF(3, 0)
2648 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2649 // see bug 4399518, 4417214
2650 if ((intptr_t)count <= 0) return -1;
2651
2652 int result = vsnprintf(str, count, fmt, args);
2653 // Note: on truncation vsnprintf(3) on Unix returns numbers of
2654 // characters which would have been written had the buffer been large
2655 // enough; on Windows, it returns -1. We handle both cases here and
2656 // always return -1, and perform null termination.
2657 if ((result > 0 && (size_t)result >= count) || result == -1) {
2658 str[count - 1] = '\0';
2659 result = -1;
2660 }
2661
2662 return result;
2663 }
2664
2665 ATTRIBUTE_PRINTF(3, 0)
2666 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2667 va_list args;
2668 int len;
2669 va_start(args, fmt);
2670 len = jio_vsnprintf(str, count, fmt, args);
2671 va_end(args);
2672 return len;
2673 }
2674
2675 ATTRIBUTE_PRINTF(2,3)
2676 int jio_fprintf(FILE* f, const char *fmt, ...) {
2677 int len;
2678 va_list args;
2679 va_start(args, fmt);
2680 len = jio_vfprintf(f, fmt, args);
2681 va_end(args);
2682 return len;
2683 }
2684
2685 ATTRIBUTE_PRINTF(2, 0)
2686 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2687 if (Arguments::vfprintf_hook() != NULL) {
2688 return Arguments::vfprintf_hook()(f, fmt, args);
2689 } else {
2690 return vfprintf(f, fmt, args);
2691 }
2692 }
2693
2694 ATTRIBUTE_PRINTF(1, 2)
2695 JNIEXPORT int jio_printf(const char *fmt, ...) {
2696 int len;
2697 va_list args;
2698 va_start(args, fmt);
2699 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2700 va_end(args);
2701 return len;
2702 }
2703
2704
2705 // HotSpot specific jio method
2706 void jio_print(const char* s) {
2707 // Try to make this function as atomic as possible.
2708 if (Arguments::vfprintf_hook() != NULL) {
2709 jio_fprintf(defaultStream::output_stream(), "%s", s);
2710 } else {
2711 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2712 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2713 }
2714 }
2715
2716 } // Extern C
2717
2718 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2719
2720 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2721 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2722 // OSThread objects. The exception to this rule is when the target object is the thread
2723 // doing the operation, in which case we know that the thread won't exit until the
2724 // operation is done (all exits being voluntary). There are a few cases where it is
2725 // rather silly to do operations on yourself, like resuming yourself or asking whether
2726 // you are alive. While these can still happen, they are not subject to deadlocks if
2727 // the lock is held while the operation occurs (this is not the case for suspend, for
2728 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2729 // implementation is local to this file, we always lock Threads_lock for that one.
2730
2731 static void thread_entry(JavaThread* thread, TRAPS) {
2732 HandleMark hm(THREAD);
2733 Handle obj(THREAD, thread->threadObj());
2734 JavaValue result(T_VOID);
2735 JavaCalls::call_virtual(&result,
2736 obj,
2737 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2738 vmSymbols::run_method_name(),
2739 vmSymbols::void_method_signature(),
2740 THREAD);
2741 }
2742
2743
2744 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2745 JVMWrapper("JVM_StartThread");
2746 JavaThread *native_thread = NULL;
2747
2748 // We cannot hold the Threads_lock when we throw an exception,
2749 // due to rank ordering issues. Example: we might need to grab the
2750 // Heap_lock while we construct the exception.
2751 bool throw_illegal_thread_state = false;
2752
2753 // We must release the Threads_lock before we can post a jvmti event
2754 // in Thread::start.
2755 {
2756 // Ensure that the C++ Thread and OSThread structures aren't freed before
2757 // we operate.
2758 MutexLocker mu(Threads_lock);
2759
2760 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2761 // re-starting an already started thread, so we should usually find
2762 // that the JavaThread is null. However for a JNI attached thread
2763 // there is a small window between the Thread object being created
2764 // (with its JavaThread set) and the update to its threadStatus, so we
2765 // have to check for this
2766 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2767 throw_illegal_thread_state = true;
2768 } else {
2769 // We could also check the stillborn flag to see if this thread was already stopped, but
2770 // for historical reasons we let the thread detect that itself when it starts running
2771
2772 jlong size =
2773 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2774 // Allocate the C++ Thread structure and create the native thread. The
2775 // stack size retrieved from java is signed, but the constructor takes
2776 // size_t (an unsigned type), so avoid passing negative values which would
2777 // result in really large stacks.
2778 size_t sz = size > 0 ? (size_t) size : 0;
2779 native_thread = new JavaThread(&thread_entry, sz);
2780
2781 // At this point it may be possible that no osthread was created for the
2782 // JavaThread due to lack of memory. Check for this situation and throw
2783 // an exception if necessary. Eventually we may want to change this so
2784 // that we only grab the lock if the thread was created successfully -
2785 // then we can also do this check and throw the exception in the
2786 // JavaThread constructor.
2787 if (native_thread->osthread() != NULL) {
2788 // Note: the current thread is not being used within "prepare".
2789 native_thread->prepare(jthread);
2790 }
2791 }
2792 }
2793
2794 if (throw_illegal_thread_state) {
2795 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2796 }
2797
2798 assert(native_thread != NULL, "Starting null thread?");
2799
2800 if (native_thread->osthread() == NULL) {
2801 // No one should hold a reference to the 'native_thread'.
2802 delete native_thread;
2803 if (JvmtiExport::should_post_resource_exhausted()) {
2804 JvmtiExport::post_resource_exhausted(
2805 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2806 os::native_thread_creation_failed_msg());
2807 }
2808 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2809 os::native_thread_creation_failed_msg());
2810 }
2811
2812 Thread::start(native_thread);
2813
2814 JVM_END
2815
2816 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2817 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2818 // but is thought to be reliable and simple. In the case, where the receiver is the
2819 // same thread as the sender, no safepoint is needed.
2820 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2821 JVMWrapper("JVM_StopThread");
2822
2823 oop java_throwable = JNIHandles::resolve(throwable);
2824 if (java_throwable == NULL) {
2825 THROW(vmSymbols::java_lang_NullPointerException());
2826 }
2827 oop java_thread = JNIHandles::resolve_non_null(jthread);
2828 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2829 Events::log_exception(JavaThread::current(),
2830 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2831 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2832 // First check if thread is alive
2833 if (receiver != NULL) {
2834 // Check if exception is getting thrown at self (use oop equality, since the
2835 // target object might exit)
2836 if (java_thread == thread->threadObj()) {
2837 THROW_OOP(java_throwable);
2838 } else {
2839 // Enques a VM_Operation to stop all threads and then deliver the exception...
2840 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2841 }
2842 }
2843 else {
2844 // Either:
2845 // - target thread has not been started before being stopped, or
2846 // - target thread already terminated
2847 // We could read the threadStatus to determine which case it is
2848 // but that is overkill as it doesn't matter. We must set the
2849 // stillborn flag for the first case, and if the thread has already
2850 // exited setting this flag has no affect
2851 java_lang_Thread::set_stillborn(java_thread);
2852 }
2853 JVM_END
2854
2855
2856 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2857 JVMWrapper("JVM_IsThreadAlive");
2858
2859 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2860 return java_lang_Thread::is_alive(thread_oop);
2861 JVM_END
2862
2863
2864 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2865 JVMWrapper("JVM_SuspendThread");
2866 oop java_thread = JNIHandles::resolve_non_null(jthread);
2867 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2868
2869 if (receiver != NULL) {
2870 // thread has run and has not exited (still on threads list)
2871
2872 {
2873 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2874 if (receiver->is_external_suspend()) {
2875 // Don't allow nested external suspend requests. We can't return
2876 // an error from this interface so just ignore the problem.
2877 return;
2878 }
2879 if (receiver->is_exiting()) { // thread is in the process of exiting
2880 return;
2881 }
2882 receiver->set_external_suspend();
2883 }
2884
2885 // java_suspend() will catch threads in the process of exiting
2886 // and will ignore them.
2887 receiver->java_suspend();
2888
2889 // It would be nice to have the following assertion in all the
2890 // time, but it is possible for a racing resume request to have
2891 // resumed this thread right after we suspended it. Temporarily
2892 // enable this assertion if you are chasing a different kind of
2893 // bug.
2894 //
2895 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2896 // receiver->is_being_ext_suspended(), "thread is not suspended");
2897 }
2898 JVM_END
2899
2900
2901 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2902 JVMWrapper("JVM_ResumeThread");
2903 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2904 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2905 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2906 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2907 // looks at it.
2908 MutexLocker ml(Threads_lock);
2909 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2910 if (thr != NULL) {
2911 // the thread has run and is not in the process of exiting
2912 thr->java_resume();
2913 }
2914 JVM_END
2915
2916
2917 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2918 JVMWrapper("JVM_SetThreadPriority");
2919 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2920 MutexLocker ml(Threads_lock);
2921 oop java_thread = JNIHandles::resolve_non_null(jthread);
2922 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2923 JavaThread* thr = java_lang_Thread::thread(java_thread);
2924 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2925 Thread::set_priority(thr, (ThreadPriority)prio);
2926 }
2927 JVM_END
2928
2929
2930 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2931 JVMWrapper("JVM_Yield");
2932 if (os::dont_yield()) return;
2933 HOTSPOT_THREAD_YIELD();
2934
2935 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2936 // Critical for similar threading behaviour
2937 if (ConvertYieldToSleep) {
2938 os::sleep(thread, MinSleepInterval, false);
2939 } else {
2940 os::naked_yield();
2941 }
2942 JVM_END
2943
2944
2945 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2946 JVMWrapper("JVM_Sleep");
2947
2948 if (millis < 0) {
2949 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2950 }
2951
2952 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2953 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2954 }
2955
2956 // Save current thread state and restore it at the end of this block.
2957 // And set new thread state to SLEEPING.
2958 JavaThreadSleepState jtss(thread);
2959
2960 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2961
2962 EventThreadSleep event;
2963
2964 if (millis == 0) {
2965 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2966 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2967 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2968 // for SOLARIS
2969 if (ConvertSleepToYield) {
2970 os::naked_yield();
2971 } else {
2972 ThreadState old_state = thread->osthread()->get_state();
2973 thread->osthread()->set_state(SLEEPING);
2974 os::sleep(thread, MinSleepInterval, false);
2975 thread->osthread()->set_state(old_state);
2976 }
2977 } else {
2978 ThreadState old_state = thread->osthread()->get_state();
2979 thread->osthread()->set_state(SLEEPING);
2980 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2981 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2982 // us while we were sleeping. We do not overwrite those.
2983 if (!HAS_PENDING_EXCEPTION) {
2984 if (event.should_commit()) {
2985 event.set_time(millis);
2986 event.commit();
2987 }
2988 HOTSPOT_THREAD_SLEEP_END(1);
2989
2990 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2991 // to properly restore the thread state. That's likely wrong.
2992 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2993 }
2994 }
2995 thread->osthread()->set_state(old_state);
2996 }
2997 if (event.should_commit()) {
2998 event.set_time(millis);
2999 event.commit();
3000 }
3001 HOTSPOT_THREAD_SLEEP_END(0);
3002 JVM_END
3003
3004 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3005 JVMWrapper("JVM_CurrentThread");
3006 oop jthread = thread->threadObj();
3007 assert (thread != NULL, "no current thread!");
3008 return JNIHandles::make_local(env, jthread);
3009 JVM_END
3010
3011
3012 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3013 JVMWrapper("JVM_CountStackFrames");
3014
3015 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3016 oop java_thread = JNIHandles::resolve_non_null(jthread);
3017 bool throw_illegal_thread_state = false;
3018 int count = 0;
3019
3020 {
3021 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3022 // We need to re-resolve the java_thread, since a GC might have happened during the
3023 // acquire of the lock
3024 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3025
3026 if (thr == NULL) {
3027 // do nothing
3028 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3029 // Check whether this java thread has been suspended already. If not, throws
3030 // IllegalThreadStateException. We defer to throw that exception until
3031 // Threads_lock is released since loading exception class has to leave VM.
3032 // The correct way to test a thread is actually suspended is
3033 // wait_for_ext_suspend_completion(), but we can't call that while holding
3034 // the Threads_lock. The above tests are sufficient for our purposes
3035 // provided the walkability of the stack is stable - which it isn't
3036 // 100% but close enough for most practical purposes.
3037 throw_illegal_thread_state = true;
3038 } else {
3039 // Count all java activation, i.e., number of vframes
3040 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3041 // Native frames are not counted
3042 if (!vfst.method()->is_native()) count++;
3043 }
3044 }
3045 }
3046
3047 if (throw_illegal_thread_state) {
3048 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3049 "this thread is not suspended");
3050 }
3051 return count;
3052 JVM_END
3053
3054 // Consider: A better way to implement JVM_Interrupt() is to acquire
3055 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3056 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3057 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3058 // outside the critical section. Threads_lock is hot so we want to minimize
3059 // the hold-time. A cleaner interface would be to decompose interrupt into
3060 // two steps. The 1st phase, performed under Threads_lock, would return
3061 // a closure that'd be invoked after Threads_lock was dropped.
3062 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3063 // admit spurious wakeups.
3064
3065 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3066 JVMWrapper("JVM_Interrupt");
3067
3068 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3069 oop java_thread = JNIHandles::resolve_non_null(jthread);
3070 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3071 // We need to re-resolve the java_thread, since a GC might have happened during the
3072 // acquire of the lock
3073 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3074 if (thr != NULL) {
3075 Thread::interrupt(thr);
3076 }
3077 JVM_END
3078
3079
3080 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3081 JVMWrapper("JVM_IsInterrupted");
3082
3083 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3084 oop java_thread = JNIHandles::resolve_non_null(jthread);
3085 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3086 // We need to re-resolve the java_thread, since a GC might have happened during the
3087 // acquire of the lock
3088 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3089 if (thr == NULL) {
3090 return JNI_FALSE;
3091 } else {
3092 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3093 }
3094 JVM_END
3095
3096
3097 // Return true iff the current thread has locked the object passed in
3098
3099 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3100 JVMWrapper("JVM_HoldsLock");
3101 assert(THREAD->is_Java_thread(), "sanity check");
3102 if (obj == NULL) {
3103 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3104 }
3105 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3106 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3107 JVM_END
3108
3109
3110 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3111 JVMWrapper("JVM_DumpAllStacks");
3112 VM_PrintThreads op;
3113 VMThread::execute(&op);
3114 if (JvmtiExport::should_post_data_dump()) {
3115 JvmtiExport::post_data_dump();
3116 }
3117 JVM_END
3118
3119 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3120 JVMWrapper("JVM_SetNativeThreadName");
3121 ResourceMark rm(THREAD);
3122 oop java_thread = JNIHandles::resolve_non_null(jthread);
3123 JavaThread* thr = java_lang_Thread::thread(java_thread);
3124 // Thread naming only supported for the current thread, doesn't work for
3125 // target threads.
3126 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3127 // we don't set the name of an attached thread to avoid stepping
3128 // on other programs
3129 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3130 os::set_native_thread_name(thread_name);
3131 }
3132 JVM_END
3133
3134 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3135
3136 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3137 assert(jthread->is_Java_thread(), "must be a Java thread");
3138 if (jthread->privileged_stack_top() == NULL) return false;
3139 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3140 oop loader = jthread->privileged_stack_top()->class_loader();
3141 if (loader == NULL) return true;
3142 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3143 if (trusted) return true;
3144 }
3145 return false;
3146 }
3147
3148 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3149 JVMWrapper("JVM_CurrentLoadedClass");
3150 ResourceMark rm(THREAD);
3151
3152 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3153 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3154 bool trusted = is_trusted_frame(thread, &vfst);
3155 if (trusted) return NULL;
3156
3157 Method* m = vfst.method();
3158 if (!m->is_native()) {
3159 InstanceKlass* holder = m->method_holder();
3160 oop loader = holder->class_loader();
3161 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3162 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3163 }
3164 }
3165 }
3166 return NULL;
3167 JVM_END
3168
3169
3170 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3171 JVMWrapper("JVM_CurrentClassLoader");
3172 ResourceMark rm(THREAD);
3173
3174 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3175
3176 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3177 bool trusted = is_trusted_frame(thread, &vfst);
3178 if (trusted) return NULL;
3179
3180 Method* m = vfst.method();
3181 if (!m->is_native()) {
3182 InstanceKlass* holder = m->method_holder();
3183 assert(holder->is_klass(), "just checking");
3184 oop loader = holder->class_loader();
3185 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3186 return JNIHandles::make_local(env, loader);
3187 }
3188 }
3189 }
3190 return NULL;
3191 JVM_END
3192
3193
3194 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3195 JVMWrapper("JVM_GetClassContext");
3196 ResourceMark rm(THREAD);
3197 JvmtiVMObjectAllocEventCollector oam;
3198 vframeStream vfst(thread);
3199
3200 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3201 // This must only be called from SecurityManager.getClassContext
3202 Method* m = vfst.method();
3203 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3204 m->name() == vmSymbols::getClassContext_name() &&
3205 m->signature() == vmSymbols::void_class_array_signature())) {
3206 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3207 }
3208 }
3209
3210 // Collect method holders
3211 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3212 for (; !vfst.at_end(); vfst.security_next()) {
3213 Method* m = vfst.method();
3214 // Native frames are not returned
3215 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3216 Klass* holder = m->method_holder();
3217 assert(holder->is_klass(), "just checking");
3218 klass_array->append(holder);
3219 }
3220 }
3221
3222 // Create result array of type [Ljava/lang/Class;
3223 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3224 // Fill in mirrors corresponding to method holders
3225 for (int i = 0; i < klass_array->length(); i++) {
3226 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3227 }
3228
3229 return (jobjectArray) JNIHandles::make_local(env, result);
3230 JVM_END
3231
3232
3233 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3234 JVMWrapper("JVM_ClassDepth");
3235 ResourceMark rm(THREAD);
3236 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3237 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3238
3239 const char* str = java_lang_String::as_utf8_string(class_name_str());
3240 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3241 if (class_name_sym == NULL) {
3242 return -1;
3243 }
3244
3245 int depth = 0;
3246
3247 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3248 if (!vfst.method()->is_native()) {
3249 InstanceKlass* holder = vfst.method()->method_holder();
3250 assert(holder->is_klass(), "just checking");
3251 if (holder->name() == class_name_sym) {
3252 return depth;
3253 }
3254 depth++;
3255 }
3256 }
3257 return -1;
3258 JVM_END
3259
3260
3261 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3262 JVMWrapper("JVM_ClassLoaderDepth");
3263 ResourceMark rm(THREAD);
3264 int depth = 0;
3265 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3266 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3267 bool trusted = is_trusted_frame(thread, &vfst);
3268 if (trusted) return -1;
3269
3270 Method* m = vfst.method();
3271 if (!m->is_native()) {
3272 InstanceKlass* holder = m->method_holder();
3273 assert(holder->is_klass(), "just checking");
3274 oop loader = holder->class_loader();
3275 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3276 return depth;
3277 }
3278 depth++;
3279 }
3280 }
3281 return -1;
3282 JVM_END
3283
3284
3285 // java.lang.Package ////////////////////////////////////////////////////////////////
3286
3287
3288 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3289 JVMWrapper("JVM_GetSystemPackage");
3290 ResourceMark rm(THREAD);
3291 JvmtiVMObjectAllocEventCollector oam;
3292 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3293 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3294 return (jstring) JNIHandles::make_local(result);
3295 JVM_END
3296
3297
3298 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3299 JVMWrapper("JVM_GetSystemPackages");
3300 JvmtiVMObjectAllocEventCollector oam;
3301 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3302 return (jobjectArray) JNIHandles::make_local(result);
3303 JVM_END
3304
3305
3306 // ObjectInputStream ///////////////////////////////////////////////////////////////
3307
3308 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3309 if (current_class == NULL) {
3310 return true;
3311 }
3312 if ((current_class == field_class) || access.is_public()) {
3313 return true;
3314 }
3315
3316 if (access.is_protected()) {
3317 // See if current_class is a subclass of field_class
3318 if (current_class->is_subclass_of(field_class)) {
3319 return true;
3320 }
3321 }
3322
3323 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3324 }
3325
3326 // Return the first non-null class loader up the execution stack, or null
3327 // if only code from the null class loader is on the stack.
3328
3329 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3330 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3331 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3332 oop loader = vfst.method()->method_holder()->class_loader();
3333 if (loader != NULL) {
3334 return JNIHandles::make_local(env, loader);
3335 }
3336 }
3337 return NULL;
3338 JVM_END
3339
3340
3341 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3342
3343
3344 // resolve array handle and check arguments
3345 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3346 if (arr == NULL) {
3347 THROW_0(vmSymbols::java_lang_NullPointerException());
3348 }
3349 oop a = JNIHandles::resolve_non_null(arr);
3350 if (!a->is_array()) {
3351 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3352 } else if (type_array_only && !a->is_typeArray()) {
3353 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3354 }
3355 return arrayOop(a);
3356 }
3357
3358
3359 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3360 JVMWrapper("JVM_GetArrayLength");
3361 arrayOop a = check_array(env, arr, false, CHECK_0);
3362 return a->length();
3363 JVM_END
3364
3365
3366 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3367 JVMWrapper("JVM_Array_Get");
3368 JvmtiVMObjectAllocEventCollector oam;
3369 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3370 jvalue value;
3371 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3372 oop box = Reflection::box(&value, type, CHECK_NULL);
3373 return JNIHandles::make_local(env, box);
3374 JVM_END
3375
3376
3377 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3378 JVMWrapper("JVM_GetPrimitiveArrayElement");
3379 jvalue value;
3380 value.i = 0; // to initialize value before getting used in CHECK
3381 arrayOop a = check_array(env, arr, true, CHECK_(value));
3382 assert(a->is_typeArray(), "just checking");
3383 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3384 BasicType wide_type = (BasicType) wCode;
3385 if (type != wide_type) {
3386 Reflection::widen(&value, type, wide_type, CHECK_(value));
3387 }
3388 return value;
3389 JVM_END
3390
3391
3392 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3393 JVMWrapper("JVM_SetArrayElement");
3394 arrayOop a = check_array(env, arr, false, CHECK);
3395 oop box = JNIHandles::resolve(val);
3396 jvalue value;
3397 value.i = 0; // to initialize value before getting used in CHECK
3398 BasicType value_type;
3399 if (a->is_objArray()) {
3400 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3401 value_type = Reflection::unbox_for_regular_object(box, &value);
3402 } else {
3403 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3404 }
3405 Reflection::array_set(&value, a, index, value_type, CHECK);
3406 JVM_END
3407
3408
3409 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3410 JVMWrapper("JVM_SetPrimitiveArrayElement");
3411 arrayOop a = check_array(env, arr, true, CHECK);
3412 assert(a->is_typeArray(), "just checking");
3413 BasicType value_type = (BasicType) vCode;
3414 Reflection::array_set(&v, a, index, value_type, CHECK);
3415 JVM_END
3416
3417
3418 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3419 JVMWrapper("JVM_NewArray");
3420 JvmtiVMObjectAllocEventCollector oam;
3421 oop element_mirror = JNIHandles::resolve(eltClass);
3422 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3423 return JNIHandles::make_local(env, result);
3424 JVM_END
3425
3426
3427 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3428 JVMWrapper("JVM_NewMultiArray");
3429 JvmtiVMObjectAllocEventCollector oam;
3430 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3431 oop element_mirror = JNIHandles::resolve(eltClass);
3432 assert(dim_array->is_typeArray(), "just checking");
3433 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3434 return JNIHandles::make_local(env, result);
3435 JVM_END
3436
3437
3438 // Library support ///////////////////////////////////////////////////////////////////////////
3439
3440 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3441 //%note jvm_ct
3442 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3443 char ebuf[1024];
3444 void *load_result;
3445 {
3446 ThreadToNativeFromVM ttnfvm(thread);
3447 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3448 }
3449 if (load_result == NULL) {
3450 char msg[1024];
3451 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3452 // Since 'ebuf' may contain a string encoded using
3453 // platform encoding scheme, we need to pass
3454 // Exceptions::unsafe_to_utf8 to the new_exception method
3455 // as the last argument. See bug 6367357.
3456 Handle h_exception =
3457 Exceptions::new_exception(thread,
3458 vmSymbols::java_lang_UnsatisfiedLinkError(),
3459 msg, Exceptions::unsafe_to_utf8);
3460
3461 THROW_HANDLE_0(h_exception);
3462 }
3463 return load_result;
3464 JVM_END
3465
3466
3467 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3468 JVMWrapper("JVM_UnloadLibrary");
3469 os::dll_unload(handle);
3470 JVM_END
3471
3472
3473 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3474 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3475 return os::dll_lookup(handle, name);
3476 JVM_END
3477
3478
3479 // JNI version ///////////////////////////////////////////////////////////////////////////////
3480
3481 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3482 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3483 return Threads::is_supported_jni_version_including_1_1(version);
3484 JVM_END
3485
3486
3487 // String support ///////////////////////////////////////////////////////////////////////////
3488
3489 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3490 JVMWrapper("JVM_InternString");
3491 JvmtiVMObjectAllocEventCollector oam;
3492 if (str == NULL) return NULL;
3493 oop string = JNIHandles::resolve_non_null(str);
3494 oop result = StringTable::intern(string, CHECK_NULL);
3495 return (jstring) JNIHandles::make_local(env, result);
3496 JVM_END
3497
3498
3499 // Raw monitor support //////////////////////////////////////////////////////////////////////
3500
3501 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3502 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3503 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3504 // that only works with java threads.
3505
3506
3507 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3508 VM_Exit::block_if_vm_exited();
3509 JVMWrapper("JVM_RawMonitorCreate");
3510 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3511 }
3512
3513
3514 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3515 VM_Exit::block_if_vm_exited();
3516 JVMWrapper("JVM_RawMonitorDestroy");
3517 delete ((Mutex*) mon);
3518 }
3519
3520
3521 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3522 VM_Exit::block_if_vm_exited();
3523 JVMWrapper("JVM_RawMonitorEnter");
3524 ((Mutex*) mon)->jvm_raw_lock();
3525 return 0;
3526 }
3527
3528
3529 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3530 VM_Exit::block_if_vm_exited();
3531 JVMWrapper("JVM_RawMonitorExit");
3532 ((Mutex*) mon)->jvm_raw_unlock();
3533 }
3534
3535
3536 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3537
3538 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3539 Handle loader, Handle protection_domain,
3540 jboolean throwError, TRAPS) {
3541 // Security Note:
3542 // The Java level wrapper will perform the necessary security check allowing
3543 // us to pass the NULL as the initiating class loader. The VM is responsible for
3544 // the checkPackageAccess relative to the initiating class loader via the
3545 // protection_domain. The protection_domain is passed as NULL by the java code
3546 // if there is no security manager in 3-arg Class.forName().
3547 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3548
3549 KlassHandle klass_handle(THREAD, klass);
3550 // Check if we should initialize the class
3551 if (init && klass_handle->is_instance_klass()) {
3552 klass_handle->initialize(CHECK_NULL);
3553 }
3554 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3555 }
3556
3557
3558 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3559
3560 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3561 JVMWrapper("JVM_InvokeMethod");
3562 Handle method_handle;
3563 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3564 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3565 Handle receiver(THREAD, JNIHandles::resolve(obj));
3566 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3567 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3568 jobject res = JNIHandles::make_local(env, result);
3569 if (JvmtiExport::should_post_vm_object_alloc()) {
3570 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3571 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3572 if (java_lang_Class::is_primitive(ret_type)) {
3573 // Only for primitive type vm allocates memory for java object.
3574 // See box() method.
3575 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3576 }
3577 }
3578 return res;
3579 } else {
3580 THROW_0(vmSymbols::java_lang_StackOverflowError());
3581 }
3582 JVM_END
3583
3584
3585 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3586 JVMWrapper("JVM_NewInstanceFromConstructor");
3587 oop constructor_mirror = JNIHandles::resolve(c);
3588 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3589 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3590 jobject res = JNIHandles::make_local(env, result);
3591 if (JvmtiExport::should_post_vm_object_alloc()) {
3592 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3593 }
3594 return res;
3595 JVM_END
3596
3597 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3598
3599 JVM_LEAF(jboolean, JVM_SupportsCX8())
3600 JVMWrapper("JVM_SupportsCX8");
3601 return VM_Version::supports_cx8();
3602 JVM_END
3603
3604 // Returns an array of all live Thread objects (VM internal JavaThreads,
3605 // jvmti agent threads, and JNI attaching threads are skipped)
3606 // See CR 6404306 regarding JNI attaching threads
3607 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3608 ResourceMark rm(THREAD);
3609 ThreadsListEnumerator tle(THREAD, false, false);
3610 JvmtiVMObjectAllocEventCollector oam;
3611
3612 int num_threads = tle.num_threads();
3613 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3614 objArrayHandle threads_ah(THREAD, r);
3615
3616 for (int i = 0; i < num_threads; i++) {
3617 Handle h = tle.get_threadObj(i);
3618 threads_ah->obj_at_put(i, h());
3619 }
3620
3621 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3622 JVM_END
3623
3624
3625 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3626 // Return StackTraceElement[][], each element is the stack trace of a thread in
3627 // the corresponding entry in the given threads array
3628 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3629 JVMWrapper("JVM_DumpThreads");
3630 JvmtiVMObjectAllocEventCollector oam;
3631
3632 // Check if threads is null
3633 if (threads == NULL) {
3634 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3635 }
3636
3637 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3638 objArrayHandle ah(THREAD, a);
3639 int num_threads = ah->length();
3640 // check if threads is non-empty array
3641 if (num_threads == 0) {
3642 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3643 }
3644
3645 // check if threads is not an array of objects of Thread class
3646 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3647 if (k != SystemDictionary::Thread_klass()) {
3648 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3649 }
3650
3651 ResourceMark rm(THREAD);
3652
3653 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3654 for (int i = 0; i < num_threads; i++) {
3655 oop thread_obj = ah->obj_at(i);
3656 instanceHandle h(THREAD, (instanceOop) thread_obj);
3657 thread_handle_array->append(h);
3658 }
3659
3660 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3661 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3662
3663 JVM_END
3664
3665 // JVM monitoring and management support
3666 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3667 return Management::get_jmm_interface(version);
3668 JVM_END
3669
3670 // com.sun.tools.attach.VirtualMachine agent properties support
3671 //
3672 // Initialize the agent properties with the properties maintained in the VM
3673 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3674 JVMWrapper("JVM_InitAgentProperties");
3675 ResourceMark rm;
3676
3677 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3678
3679 PUTPROP(props, "sun.java.command", Arguments::java_command());
3680 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3681 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3682 return properties;
3683 JVM_END
3684
3685 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3686 {
3687 JVMWrapper("JVM_GetEnclosingMethodInfo");
3688 JvmtiVMObjectAllocEventCollector oam;
3689
3690 if (ofClass == NULL) {
3691 return NULL;
3692 }
3693 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3694 // Special handling for primitive objects
3695 if (java_lang_Class::is_primitive(mirror())) {
3696 return NULL;
3697 }
3698 Klass* k = java_lang_Class::as_Klass(mirror());
3699 if (!k->is_instance_klass()) {
3700 return NULL;
3701 }
3702 instanceKlassHandle ik_h(THREAD, k);
3703 int encl_method_class_idx = ik_h->enclosing_method_class_index();
3704 if (encl_method_class_idx == 0) {
3705 return NULL;
3706 }
3707 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3708 objArrayHandle dest(THREAD, dest_o);
3709 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3710 dest->obj_at_put(0, enc_k->java_mirror());
3711 int encl_method_method_idx = ik_h->enclosing_method_method_index();
3712 if (encl_method_method_idx != 0) {
3713 Symbol* sym = ik_h->constants()->symbol_at(
3714 extract_low_short_from_int(
3715 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3716 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3717 dest->obj_at_put(1, str());
3718 sym = ik_h->constants()->symbol_at(
3719 extract_high_short_from_int(
3720 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3721 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3722 dest->obj_at_put(2, str());
3723 }
3724 return (jobjectArray) JNIHandles::make_local(dest());
3725 }
3726 JVM_END
3727
3728 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3729 {
3730 memset(info, 0, info_size);
3731
3732 info->jvm_version = Abstract_VM_Version::jvm_version();
3733 info->update_version = 0; /* 0 in HotSpot Express VM */
3734 info->special_update_version = 0; /* 0 in HotSpot Express VM */
3735
3736 // when we add a new capability in the jvm_version_info struct, we should also
3737 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3738 // counter defined in runtimeService.cpp.
3739 info->is_attachable = AttachListener::is_attach_supported();
3740 }
3741 JVM_END