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 // and JVM_DefineClassWithSourceCond()
954 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
955 jobject loader, const jbyte *buf,
956 jsize len, jobject pd, const char *source,
957 jboolean verify, TRAPS) {
958 if (source == NULL) source = "__JVM_DefineClass__";
959
960 assert(THREAD->is_Java_thread(), "must be a JavaThread");
961 JavaThread* jt = (JavaThread*) THREAD;
962
963 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
964 ClassLoader::perf_define_appclass_selftime(),
965 ClassLoader::perf_define_appclasses(),
966 jt->get_thread_stat()->perf_recursion_counts_addr(),
967 jt->get_thread_stat()->perf_timers_addr(),
968 PerfClassTraceTime::DEFINE_CLASS);
969
970 if (UsePerfData) {
971 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
972 }
973
974 // Since exceptions can be thrown, class initialization can take place
975 // if name is NULL no check for class name in .class stream has to be made.
976 TempNewSymbol class_name = NULL;
977 if (name != NULL) {
978 const int str_len = (int)strlen(name);
979 if (str_len > Symbol::max_length()) {
980 // It's impossible to create this class; the name cannot fit
981 // into the constant pool.
982 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
983 }
984 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
985 }
986
987 ResourceMark rm(THREAD);
988 ClassFileStream st((u1*) buf, len, (char *)source);
989 Handle class_loader (THREAD, JNIHandles::resolve(loader));
990 if (UsePerfData) {
991 is_lock_held_by_thread(class_loader,
992 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
993 THREAD);
994 }
995 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
996 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
997 protection_domain, &st,
998 verify != 0,
999 CHECK_NULL);
1000
1001 if (TraceClassResolution && k != NULL) {
1002 trace_class_resolution(k);
1003 }
1004
1005 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1006 }
1007
1008
1009 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1010 JVMWrapper2("JVM_DefineClass %s", name);
1011
1012 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1013 JVM_END
1014
1015
1016 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1017 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1018
1019 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1020 JVM_END
1021
1022 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1023 jobject loader, const jbyte *buf,
1024 jsize len, jobject pd,
1025 const char *source, jboolean verify))
1026 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1027
1028 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1029 JVM_END
1030
1031 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1032 JVMWrapper("JVM_FindLoadedClass");
1033 ResourceMark rm(THREAD);
1034
1035 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1036 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1037
1038 const char* str = java_lang_String::as_utf8_string(string());
1039 // Sanity check, don't expect null
1040 if (str == NULL) return NULL;
1041
1042 const int str_len = (int)strlen(str);
1043 if (str_len > Symbol::max_length()) {
1044 // It's impossible to create this class; the name cannot fit
1045 // into the constant pool.
1046 return NULL;
1047 }
1048 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1049
1050 // Security Note:
1051 // The Java level wrapper will perform the necessary security check allowing
1052 // us to pass the NULL as the initiating class loader.
1053 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1054 if (UsePerfData) {
1055 is_lock_held_by_thread(h_loader,
1056 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1057 THREAD);
1058 }
1059
1060 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1061 h_loader,
1062 Handle(),
1063 CHECK_NULL);
1064 #if INCLUDE_CDS
1065 if (k == NULL) {
1066 // If the class is not already loaded, try to see if it's in the shared
1067 // archive for the current classloader (h_loader).
1068 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1069 klass_name, h_loader, CHECK_NULL);
1070 k = ik();
1071 }
1072 #endif
1073 return (k == NULL) ? NULL :
1074 (jclass) JNIHandles::make_local(env, k->java_mirror());
1075 JVM_END
1076
1077
1078 // Reflection support //////////////////////////////////////////////////////////////////////////////
1079
1080 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1081 assert (cls != NULL, "illegal class");
1082 JVMWrapper("JVM_GetClassName");
1083 JvmtiVMObjectAllocEventCollector oam;
1084 ResourceMark rm(THREAD);
1085 const char* name;
1086 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1087 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1088 } else {
1089 // Consider caching interned string in Klass
1090 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1091 assert(k->is_klass(), "just checking");
1092 name = k->external_name();
1093 }
1094 oop result = StringTable::intern((char*) name, CHECK_NULL);
1095 return (jstring) JNIHandles::make_local(env, result);
1096 JVM_END
1097
1098
1099 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1100 JVMWrapper("JVM_GetClassInterfaces");
1101 JvmtiVMObjectAllocEventCollector oam;
1102 oop mirror = JNIHandles::resolve_non_null(cls);
1103
1104 // Special handling for primitive objects
1105 if (java_lang_Class::is_primitive(mirror)) {
1106 // Primitive objects does not have any interfaces
1107 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1108 return (jobjectArray) JNIHandles::make_local(env, r);
1109 }
1110
1111 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1112 // Figure size of result array
1113 int size;
1114 if (klass->is_instance_klass()) {
1115 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1116 } else {
1117 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1118 size = 2;
1119 }
1120
1121 // Allocate result array
1122 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1123 objArrayHandle result (THREAD, r);
1124 // Fill in result
1125 if (klass->is_instance_klass()) {
1126 // Regular instance klass, fill in all local interfaces
1127 for (int index = 0; index < size; index++) {
1128 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1129 result->obj_at_put(index, k->java_mirror());
1130 }
1131 } else {
1132 // All arrays implement java.lang.Cloneable and java.io.Serializable
1133 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1134 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1135 }
1136 return (jobjectArray) JNIHandles::make_local(env, result());
1137 JVM_END
1138
1139
1140 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1141 JVMWrapper("JVM_IsInterface");
1142 oop mirror = JNIHandles::resolve_non_null(cls);
1143 if (java_lang_Class::is_primitive(mirror)) {
1144 return JNI_FALSE;
1145 }
1146 Klass* k = java_lang_Class::as_Klass(mirror);
1147 jboolean result = k->is_interface();
1148 assert(!result || k->is_instance_klass(),
1149 "all interfaces are instance types");
1150 // The compiler intrinsic for isInterface tests the
1151 // Klass::_access_flags bits in the same way.
1152 return result;
1153 JVM_END
1154
1155
1156 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1157 JVMWrapper("JVM_GetClassSigners");
1158 JvmtiVMObjectAllocEventCollector oam;
1159 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1160 // There are no signers for primitive types
1161 return NULL;
1162 }
1163
1164 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1165
1166 // If there are no signers set in the class, or if the class
1167 // is an array, return NULL.
1168 if (signers == NULL) return NULL;
1169
1170 // copy of the signers array
1171 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1172 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1173 for (int index = 0; index < signers->length(); index++) {
1174 signers_copy->obj_at_put(index, signers->obj_at(index));
1175 }
1176
1177 // return the copy
1178 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1179 JVM_END
1180
1181
1182 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1183 JVMWrapper("JVM_SetClassSigners");
1184 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1185 // This call is ignored for primitive types and arrays.
1186 // Signers are only set once, ClassLoader.java, and thus shouldn't
1187 // be called with an array. Only the bootstrap loader creates arrays.
1188 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1189 if (k->is_instance_klass()) {
1190 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1191 }
1192 }
1193 JVM_END
1194
1195
1196 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1197 JVMWrapper("JVM_GetProtectionDomain");
1198 if (JNIHandles::resolve(cls) == NULL) {
1199 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1200 }
1201
1202 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1203 // Primitive types does not have a protection domain.
1204 return NULL;
1205 }
1206
1207 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1208 return (jobject) JNIHandles::make_local(env, pd);
1209 JVM_END
1210
1211
1212 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1213 // If there is a security manager and protection domain, check the access
1214 // in the protection domain, otherwise it is authorized.
1215 if (java_lang_System::has_security_manager()) {
1216
1217 // For bootstrapping, if pd implies method isn't in the JDK, allow
1218 // this context to revert to older behavior.
1219 // In this case the isAuthorized field in AccessControlContext is also not
1220 // present.
1221 if (Universe::protection_domain_implies_method() == NULL) {
1222 return true;
1223 }
1224
1225 // Whitelist certain access control contexts
1226 if (java_security_AccessControlContext::is_authorized(context)) {
1227 return true;
1228 }
1229
1230 oop prot = klass->protection_domain();
1231 if (prot != NULL) {
1232 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1233 // in the new wrapper.
1234 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1235 Handle h_prot(THREAD, prot);
1236 JavaValue result(T_BOOLEAN);
1237 JavaCallArguments args(h_prot);
1238 JavaCalls::call(&result, m, &args, CHECK_false);
1239 return (result.get_jboolean() != 0);
1240 }
1241 }
1242 return true;
1243 }
1244
1245 // Create an AccessControlContext with a protection domain with null codesource
1246 // and null permissions - which gives no permissions.
1247 oop create_dummy_access_control_context(TRAPS) {
1248 InstanceKlass* pd_klass = SystemDictionary::ProtectionDomain_klass();
1249 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1250 // Call constructor ProtectionDomain(null, null);
1251 JavaValue result(T_VOID);
1252 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1253 vmSymbols::object_initializer_name(),
1254 vmSymbols::codesource_permissioncollection_signature(),
1255 Handle(), Handle(), CHECK_NULL);
1256
1257 // new ProtectionDomain[] {pd};
1258 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1259 context->obj_at_put(0, obj());
1260
1261 // new AccessControlContext(new ProtectionDomain[] {pd})
1262 objArrayHandle h_context(THREAD, context);
1263 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1264 return acc;
1265 }
1266
1267 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1268 JVMWrapper("JVM_DoPrivileged");
1269
1270 if (action == NULL) {
1271 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1272 }
1273
1274 // Compute the frame initiating the do privileged operation and setup the privileged stack
1275 vframeStream vfst(thread);
1276 vfst.security_get_caller_frame(1);
1277
1278 if (vfst.at_end()) {
1279 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1280 }
1281
1282 Method* method = vfst.method();
1283 instanceKlassHandle klass (THREAD, method->method_holder());
1284
1285 // Check that action object understands "Object run()"
1286 Handle h_context;
1287 if (context != NULL) {
1288 h_context = Handle(THREAD, JNIHandles::resolve(context));
1289 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1290 if (!authorized) {
1291 // Create an unprivileged access control object and call it's run function
1292 // instead.
1293 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1294 h_context = Handle(THREAD, noprivs);
1295 }
1296 }
1297
1298 // Check that action object understands "Object run()"
1299 Handle object (THREAD, JNIHandles::resolve(action));
1300
1301 // get run() method
1302 Method* m_oop = object->klass()->uncached_lookup_method(
1303 vmSymbols::run_method_name(),
1304 vmSymbols::void_object_signature(),
1305 Klass::find_overpass);
1306 methodHandle m (THREAD, m_oop);
1307 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1308 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1309 }
1310
1311 // Stack allocated list of privileged stack elements
1312 PrivilegedElement pi;
1313 if (!vfst.at_end()) {
1314 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1315 thread->set_privileged_stack_top(&pi);
1316 }
1317
1318
1319 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1320 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1321 Handle pending_exception;
1322 JavaValue result(T_OBJECT);
1323 JavaCallArguments args(object);
1324 JavaCalls::call(&result, m, &args, THREAD);
1325
1326 // done with action, remove ourselves from the list
1327 if (!vfst.at_end()) {
1328 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1329 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1330 }
1331
1332 if (HAS_PENDING_EXCEPTION) {
1333 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1334 CLEAR_PENDING_EXCEPTION;
1335 // JVMTI has already reported the pending exception
1336 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1337 if (THREAD->is_Java_thread()) {
1338 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1339 }
1340 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1341 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1342 // Throw a java.security.PrivilegedActionException(Exception e) exception
1343 JavaCallArguments args(pending_exception);
1344 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1345 vmSymbols::exception_void_signature(),
1346 &args);
1347 }
1348 }
1349
1350 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1351 return JNIHandles::make_local(env, (oop) result.get_jobject());
1352 JVM_END
1353
1354
1355 // Returns the inherited_access_control_context field of the running thread.
1356 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1357 JVMWrapper("JVM_GetInheritedAccessControlContext");
1358 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1359 return JNIHandles::make_local(env, result);
1360 JVM_END
1361
1362 class RegisterArrayForGC {
1363 private:
1364 JavaThread *_thread;
1365 public:
1366 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1367 _thread = thread;
1368 _thread->register_array_for_gc(array);
1369 }
1370
1371 ~RegisterArrayForGC() {
1372 _thread->register_array_for_gc(NULL);
1373 }
1374 };
1375
1376
1377 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1378 JVMWrapper("JVM_GetStackAccessControlContext");
1379 if (!UsePrivilegedStack) return NULL;
1380
1381 ResourceMark rm(THREAD);
1382 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1383 JvmtiVMObjectAllocEventCollector oam;
1384
1385 // count the protection domains on the execution stack. We collapse
1386 // duplicate consecutive protection domains into a single one, as
1387 // well as stopping when we hit a privileged frame.
1388
1389 // Use vframeStream to iterate through Java frames
1390 vframeStream vfst(thread);
1391
1392 oop previous_protection_domain = NULL;
1393 Handle privileged_context(thread, NULL);
1394 bool is_privileged = false;
1395 oop protection_domain = NULL;
1396
1397 for(; !vfst.at_end(); vfst.next()) {
1398 // get method of frame
1399 Method* method = vfst.method();
1400 intptr_t* frame_id = vfst.frame_id();
1401
1402 // check the privileged frames to see if we have a match
1403 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1404 // this frame is privileged
1405 is_privileged = true;
1406 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1407 protection_domain = thread->privileged_stack_top()->protection_domain();
1408 } else {
1409 protection_domain = method->method_holder()->protection_domain();
1410 }
1411
1412 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1413 local_array->push(protection_domain);
1414 previous_protection_domain = protection_domain;
1415 }
1416
1417 if (is_privileged) break;
1418 }
1419
1420
1421 // either all the domains on the stack were system domains, or
1422 // we had a privileged system domain
1423 if (local_array->is_empty()) {
1424 if (is_privileged && privileged_context.is_null()) return NULL;
1425
1426 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1427 return JNIHandles::make_local(env, result);
1428 }
1429
1430 // the resource area must be registered in case of a gc
1431 RegisterArrayForGC ragc(thread, local_array);
1432 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1433 local_array->length(), CHECK_NULL);
1434 objArrayHandle h_context(thread, context);
1435 for (int index = 0; index < local_array->length(); index++) {
1436 h_context->obj_at_put(index, local_array->at(index));
1437 }
1438
1439 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1440
1441 return JNIHandles::make_local(env, result);
1442 JVM_END
1443
1444
1445 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1446 JVMWrapper("JVM_IsArrayClass");
1447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1448 return (k != NULL) && k->is_array_klass() ? true : false;
1449 JVM_END
1450
1451
1452 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1453 JVMWrapper("JVM_IsPrimitiveClass");
1454 oop mirror = JNIHandles::resolve_non_null(cls);
1455 return (jboolean) java_lang_Class::is_primitive(mirror);
1456 JVM_END
1457
1458
1459 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1460 JVMWrapper("JVM_GetClassModifiers");
1461 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1462 // Primitive type
1463 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1464 }
1465
1466 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1467 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1468 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1469 return k->modifier_flags();
1470 JVM_END
1471
1472
1473 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1474
1475 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1476 JvmtiVMObjectAllocEventCollector oam;
1477 // ofClass is a reference to a java_lang_Class object. The mirror object
1478 // of an InstanceKlass
1479
1480 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1481 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1482 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1483 return (jobjectArray)JNIHandles::make_local(env, result);
1484 }
1485
1486 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1487 InnerClassesIterator iter(k);
1488
1489 if (iter.length() == 0) {
1490 // Neither an inner nor outer class
1491 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1492 return (jobjectArray)JNIHandles::make_local(env, result);
1493 }
1494
1495 // find inner class info
1496 constantPoolHandle cp(thread, k->constants());
1497 int length = iter.length();
1498
1499 // Allocate temp. result array
1500 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1501 objArrayHandle result (THREAD, r);
1502 int members = 0;
1503
1504 for (; !iter.done(); iter.next()) {
1505 int ioff = iter.inner_class_info_index();
1506 int ooff = iter.outer_class_info_index();
1507
1508 if (ioff != 0 && ooff != 0) {
1509 // Check to see if the name matches the class we're looking for
1510 // before attempting to find the class.
1511 if (cp->klass_name_at_matches(k, ooff)) {
1512 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1513 if (outer_klass == k()) {
1514 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1515 instanceKlassHandle inner_klass (THREAD, ik);
1516
1517 // Throws an exception if outer klass has not declared k as
1518 // an inner klass
1519 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1520
1521 result->obj_at_put(members, inner_klass->java_mirror());
1522 members++;
1523 }
1524 }
1525 }
1526 }
1527
1528 if (members != length) {
1529 // Return array of right length
1530 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1531 for(int i = 0; i < members; i++) {
1532 res->obj_at_put(i, result->obj_at(i));
1533 }
1534 return (jobjectArray)JNIHandles::make_local(env, res);
1535 }
1536
1537 return (jobjectArray)JNIHandles::make_local(env, result());
1538 JVM_END
1539
1540
1541 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1542 {
1543 // ofClass is a reference to a java_lang_Class object.
1544 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1545 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1546 return NULL;
1547 }
1548
1549 bool inner_is_member = false;
1550 Klass* outer_klass
1551 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1552 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1553 if (outer_klass == NULL) return NULL; // already a top-level class
1554 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1555 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1556 }
1557 JVM_END
1558
1559 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1560 {
1561 oop mirror = JNIHandles::resolve_non_null(cls);
1562 if (java_lang_Class::is_primitive(mirror) ||
1563 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1564 return NULL;
1565 }
1566 instanceKlassHandle k(THREAD, InstanceKlass::cast(java_lang_Class::as_Klass(mirror)));
1567 int ooff = 0, noff = 0;
1568 if (InstanceKlass::find_inner_classes_attr(k, &ooff, &noff, THREAD)) {
1569 if (noff != 0) {
1570 constantPoolHandle i_cp(thread, k->constants());
1571 Symbol* name = i_cp->symbol_at(noff);
1572 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1573 return (jstring) JNIHandles::make_local(env, str());
1574 }
1575 }
1576 return NULL;
1577 }
1578 JVM_END
1579
1580 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1581 assert (cls != NULL, "illegal class");
1582 JVMWrapper("JVM_GetClassSignature");
1583 JvmtiVMObjectAllocEventCollector oam;
1584 ResourceMark rm(THREAD);
1585 // Return null for arrays and primatives
1586 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1587 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1588 if (k->is_instance_klass()) {
1589 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1590 if (sym == NULL) return NULL;
1591 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1592 return (jstring) JNIHandles::make_local(env, str());
1593 }
1594 }
1595 return NULL;
1596 JVM_END
1597
1598
1599 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1600 assert (cls != NULL, "illegal class");
1601 JVMWrapper("JVM_GetClassAnnotations");
1602
1603 // Return null for arrays and primitives
1604 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1605 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1606 if (k->is_instance_klass()) {
1607 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1608 return (jbyteArray) JNIHandles::make_local(env, a);
1609 }
1610 }
1611 return NULL;
1612 JVM_END
1613
1614
1615 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1616 // some of this code was adapted from from jni_FromReflectedField
1617
1618 oop reflected = JNIHandles::resolve_non_null(field);
1619 oop mirror = java_lang_reflect_Field::clazz(reflected);
1620 Klass* k = java_lang_Class::as_Klass(mirror);
1621 int slot = java_lang_reflect_Field::slot(reflected);
1622 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1623
1624 KlassHandle kh(THREAD, k);
1625 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1626
1627 if (modifiers & JVM_ACC_STATIC) {
1628 // for static fields we only look in the current class
1629 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1630 assert(false, "cannot find static field");
1631 return false;
1632 }
1633 } else {
1634 // for instance fields we start with the current class and work
1635 // our way up through the superclass chain
1636 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1637 assert(false, "cannot find instance field");
1638 return false;
1639 }
1640 }
1641 return true;
1642 }
1643
1644 static Method* jvm_get_method_common(jobject method) {
1645 // some of this code was adapted from from jni_FromReflectedMethod
1646
1647 oop reflected = JNIHandles::resolve_non_null(method);
1648 oop mirror = NULL;
1649 int slot = 0;
1650
1651 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1652 mirror = java_lang_reflect_Constructor::clazz(reflected);
1653 slot = java_lang_reflect_Constructor::slot(reflected);
1654 } else {
1655 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1656 "wrong type");
1657 mirror = java_lang_reflect_Method::clazz(reflected);
1658 slot = java_lang_reflect_Method::slot(reflected);
1659 }
1660 Klass* k = java_lang_Class::as_Klass(mirror);
1661
1662 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1663 assert(m != NULL, "cannot find method");
1664 return m; // caller has to deal with NULL in product mode
1665 }
1666
1667 /* Type use annotations support (JDK 1.8) */
1668
1669 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1670 assert (cls != NULL, "illegal class");
1671 JVMWrapper("JVM_GetClassTypeAnnotations");
1672 ResourceMark rm(THREAD);
1673 // Return null for arrays and primitives
1674 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1675 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1676 if (k->is_instance_klass()) {
1677 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1678 if (type_annotations != NULL) {
1679 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1680 return (jbyteArray) JNIHandles::make_local(env, a);
1681 }
1682 }
1683 }
1684 return NULL;
1685 JVM_END
1686
1687 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1688 assert (method != NULL, "illegal method");
1689 JVMWrapper("JVM_GetMethodTypeAnnotations");
1690
1691 // method is a handle to a java.lang.reflect.Method object
1692 Method* m = jvm_get_method_common(method);
1693 if (m == NULL) {
1694 return NULL;
1695 }
1696
1697 AnnotationArray* type_annotations = m->type_annotations();
1698 if (type_annotations != NULL) {
1699 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1700 return (jbyteArray) JNIHandles::make_local(env, a);
1701 }
1702
1703 return NULL;
1704 JVM_END
1705
1706 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1707 assert (field != NULL, "illegal field");
1708 JVMWrapper("JVM_GetFieldTypeAnnotations");
1709
1710 fieldDescriptor fd;
1711 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1712 if (!gotFd) {
1713 return NULL;
1714 }
1715
1716 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1717 JVM_END
1718
1719 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1720 if (!cp->is_within_bounds(index)) {
1721 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1722 }
1723 }
1724
1725 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1726 {
1727 JVMWrapper("JVM_GetMethodParameters");
1728 // method is a handle to a java.lang.reflect.Method object
1729 Method* method_ptr = jvm_get_method_common(method);
1730 methodHandle mh (THREAD, method_ptr);
1731 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1732 const int num_params = mh->method_parameters_length();
1733
1734 if (num_params < 0) {
1735 // A -1 return value from method_parameters_length means there is no
1736 // parameter data. Return null to indicate this to the reflection
1737 // API.
1738 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1739 return (jobjectArray)NULL;
1740 } else {
1741 // Otherwise, we return something up to reflection, even if it is
1742 // a zero-length array. Why? Because in some cases this can
1743 // trigger a MalformedParametersException.
1744
1745 // make sure all the symbols are properly formatted
1746 for (int i = 0; i < num_params; i++) {
1747 MethodParametersElement* params = mh->method_parameters_start();
1748 int index = params[i].name_cp_index;
1749 bounds_check(mh->constants(), index, CHECK_NULL);
1750
1751 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1752 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1753 "Wrong type at constant pool index");
1754 }
1755
1756 }
1757
1758 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1759 objArrayHandle result (THREAD, result_oop);
1760
1761 for (int i = 0; i < num_params; i++) {
1762 MethodParametersElement* params = mh->method_parameters_start();
1763 // For a 0 index, give a NULL symbol
1764 Symbol* sym = 0 != params[i].name_cp_index ?
1765 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1766 int flags = params[i].flags;
1767 oop param = Reflection::new_parameter(reflected_method, i, sym,
1768 flags, CHECK_NULL);
1769 result->obj_at_put(i, param);
1770 }
1771 return (jobjectArray)JNIHandles::make_local(env, result());
1772 }
1773 }
1774 JVM_END
1775
1776 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1777
1778 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1779 {
1780 JVMWrapper("JVM_GetClassDeclaredFields");
1781 JvmtiVMObjectAllocEventCollector oam;
1782
1783 // Exclude primitive types and array types
1784 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1785 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1786 // Return empty array
1787 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1788 return (jobjectArray) JNIHandles::make_local(env, res);
1789 }
1790
1791 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1792 constantPoolHandle cp(THREAD, k->constants());
1793
1794 // Ensure class is linked
1795 k->link_class(CHECK_NULL);
1796
1797 // 4496456 We need to filter out java.lang.Throwable.backtrace
1798 bool skip_backtrace = false;
1799
1800 // Allocate result
1801 int num_fields;
1802
1803 if (publicOnly) {
1804 num_fields = 0;
1805 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1806 if (fs.access_flags().is_public()) ++num_fields;
1807 }
1808 } else {
1809 num_fields = k->java_fields_count();
1810
1811 if (k() == SystemDictionary::Throwable_klass()) {
1812 num_fields--;
1813 skip_backtrace = true;
1814 }
1815 }
1816
1817 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1818 objArrayHandle result (THREAD, r);
1819
1820 int out_idx = 0;
1821 fieldDescriptor fd;
1822 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1823 if (skip_backtrace) {
1824 // 4496456 skip java.lang.Throwable.backtrace
1825 int offset = fs.offset();
1826 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1827 }
1828
1829 if (!publicOnly || fs.access_flags().is_public()) {
1830 fd.reinitialize(k(), fs.index());
1831 oop field = Reflection::new_field(&fd, CHECK_NULL);
1832 result->obj_at_put(out_idx, field);
1833 ++out_idx;
1834 }
1835 }
1836 assert(out_idx == num_fields, "just checking");
1837 return (jobjectArray) JNIHandles::make_local(env, result());
1838 }
1839 JVM_END
1840
1841 static bool select_method(methodHandle method, bool want_constructor) {
1842 if (want_constructor) {
1843 return (method->is_initializer() && !method->is_static());
1844 } else {
1845 return (!method->is_initializer() && !method->is_overpass());
1846 }
1847 }
1848
1849 static jobjectArray get_class_declared_methods_helper(
1850 JNIEnv *env,
1851 jclass ofClass, jboolean publicOnly,
1852 bool want_constructor,
1853 Klass* klass, TRAPS) {
1854
1855 JvmtiVMObjectAllocEventCollector oam;
1856
1857 // Exclude primitive types and array types
1858 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1859 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1860 // Return empty array
1861 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1862 return (jobjectArray) JNIHandles::make_local(env, res);
1863 }
1864
1865 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1866
1867 // Ensure class is linked
1868 k->link_class(CHECK_NULL);
1869
1870 Array<Method*>* methods = k->methods();
1871 int methods_length = methods->length();
1872
1873 // Save original method_idnum in case of redefinition, which can change
1874 // the idnum of obsolete methods. The new method will have the same idnum
1875 // but if we refresh the methods array, the counts will be wrong.
1876 ResourceMark rm(THREAD);
1877 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1878 int num_methods = 0;
1879
1880 for (int i = 0; i < methods_length; i++) {
1881 methodHandle method(THREAD, methods->at(i));
1882 if (select_method(method, want_constructor)) {
1883 if (!publicOnly || method->is_public()) {
1884 idnums->push(method->method_idnum());
1885 ++num_methods;
1886 }
1887 }
1888 }
1889
1890 // Allocate result
1891 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1892 objArrayHandle result (THREAD, r);
1893
1894 // Now just put the methods that we selected above, but go by their idnum
1895 // in case of redefinition. The methods can be redefined at any safepoint,
1896 // so above when allocating the oop array and below when creating reflect
1897 // objects.
1898 for (int i = 0; i < num_methods; i++) {
1899 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1900 if (method.is_null()) {
1901 // Method may have been deleted and seems this API can handle null
1902 // Otherwise should probably put a method that throws NSME
1903 result->obj_at_put(i, NULL);
1904 } else {
1905 oop m;
1906 if (want_constructor) {
1907 m = Reflection::new_constructor(method, CHECK_NULL);
1908 } else {
1909 m = Reflection::new_method(method, false, CHECK_NULL);
1910 }
1911 result->obj_at_put(i, m);
1912 }
1913 }
1914
1915 return (jobjectArray) JNIHandles::make_local(env, result());
1916 }
1917
1918 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1919 {
1920 JVMWrapper("JVM_GetClassDeclaredMethods");
1921 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1922 /*want_constructor*/ false,
1923 SystemDictionary::reflect_Method_klass(), THREAD);
1924 }
1925 JVM_END
1926
1927 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1928 {
1929 JVMWrapper("JVM_GetClassDeclaredConstructors");
1930 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1931 /*want_constructor*/ true,
1932 SystemDictionary::reflect_Constructor_klass(), THREAD);
1933 }
1934 JVM_END
1935
1936 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1937 {
1938 JVMWrapper("JVM_GetClassAccessFlags");
1939 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1940 // Primitive type
1941 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1942 }
1943
1944 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1945 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1946 }
1947 JVM_END
1948
1949
1950 // Constant pool access //////////////////////////////////////////////////////////
1951
1952 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1953 {
1954 JVMWrapper("JVM_GetClassConstantPool");
1955 JvmtiVMObjectAllocEventCollector oam;
1956
1957 // Return null for primitives and arrays
1958 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1959 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1960 if (k->is_instance_klass()) {
1961 instanceKlassHandle k_h(THREAD, k);
1962 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1963 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1964 return JNIHandles::make_local(jcp());
1965 }
1966 }
1967 return NULL;
1968 }
1969 JVM_END
1970
1971
1972 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1973 {
1974 JVMWrapper("JVM_ConstantPoolGetSize");
1975 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1976 return cp->length();
1977 }
1978 JVM_END
1979
1980
1981 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1982 {
1983 JVMWrapper("JVM_ConstantPoolGetClassAt");
1984 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1985 bounds_check(cp, index, CHECK_NULL);
1986 constantTag tag = cp->tag_at(index);
1987 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1989 }
1990 Klass* k = cp->klass_at(index, CHECK_NULL);
1991 return (jclass) JNIHandles::make_local(k->java_mirror());
1992 }
1993 JVM_END
1994
1995 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1996 {
1997 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1998 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1999 bounds_check(cp, index, CHECK_NULL);
2000 constantTag tag = cp->tag_at(index);
2001 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2002 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2003 }
2004 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2005 if (k == NULL) return NULL;
2006 return (jclass) JNIHandles::make_local(k->java_mirror());
2007 }
2008 JVM_END
2009
2010 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2011 constantTag tag = cp->tag_at(index);
2012 if (!tag.is_method() && !tag.is_interface_method()) {
2013 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2014 }
2015 int klass_ref = cp->uncached_klass_ref_index_at(index);
2016 Klass* k_o;
2017 if (force_resolution) {
2018 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2019 } else {
2020 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2021 if (k_o == NULL) return NULL;
2022 }
2023 instanceKlassHandle k(THREAD, k_o);
2024 Symbol* name = cp->uncached_name_ref_at(index);
2025 Symbol* sig = cp->uncached_signature_ref_at(index);
2026 methodHandle m (THREAD, k->find_method(name, sig));
2027 if (m.is_null()) {
2028 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2029 }
2030 oop method;
2031 if (!m->is_initializer() || m->is_static()) {
2032 method = Reflection::new_method(m, true, CHECK_NULL);
2033 } else {
2034 method = Reflection::new_constructor(m, CHECK_NULL);
2035 }
2036 return JNIHandles::make_local(method);
2037 }
2038
2039 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2040 {
2041 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2042 JvmtiVMObjectAllocEventCollector oam;
2043 constantPoolHandle cp = constantPoolHandle(THREAD, 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, true, CHECK_NULL);
2046 return res;
2047 }
2048 JVM_END
2049
2050 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2051 {
2052 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2053 JvmtiVMObjectAllocEventCollector oam;
2054 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2055 bounds_check(cp, index, CHECK_NULL);
2056 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2057 return res;
2058 }
2059 JVM_END
2060
2061 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2062 constantTag tag = cp->tag_at(index);
2063 if (!tag.is_field()) {
2064 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2065 }
2066 int klass_ref = cp->uncached_klass_ref_index_at(index);
2067 Klass* k_o;
2068 if (force_resolution) {
2069 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2070 } else {
2071 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2072 if (k_o == NULL) return NULL;
2073 }
2074 instanceKlassHandle k(THREAD, k_o);
2075 Symbol* name = cp->uncached_name_ref_at(index);
2076 Symbol* sig = cp->uncached_signature_ref_at(index);
2077 fieldDescriptor fd;
2078 Klass* target_klass = k->find_field(name, sig, &fd);
2079 if (target_klass == NULL) {
2080 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2081 }
2082 oop field = Reflection::new_field(&fd, CHECK_NULL);
2083 return JNIHandles::make_local(field);
2084 }
2085
2086 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2087 {
2088 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2089 JvmtiVMObjectAllocEventCollector oam;
2090 constantPoolHandle cp = constantPoolHandle(THREAD, 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, true, CHECK_NULL);
2093 return res;
2094 }
2095 JVM_END
2096
2097 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2098 {
2099 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2104 return res;
2105 }
2106 JVM_END
2107
2108 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2109 {
2110 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2111 JvmtiVMObjectAllocEventCollector oam;
2112 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2113 bounds_check(cp, index, CHECK_NULL);
2114 constantTag tag = cp->tag_at(index);
2115 if (!tag.is_field_or_method()) {
2116 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2117 }
2118 int klass_ref = cp->uncached_klass_ref_index_at(index);
2119 Symbol* klass_name = cp->klass_name_at(klass_ref);
2120 Symbol* member_name = cp->uncached_name_ref_at(index);
2121 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2122 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2123 objArrayHandle dest(THREAD, dest_o);
2124 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2125 dest->obj_at_put(0, str());
2126 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2127 dest->obj_at_put(1, str());
2128 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2129 dest->obj_at_put(2, str());
2130 return (jobjectArray) JNIHandles::make_local(dest());
2131 }
2132 JVM_END
2133
2134 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2135 {
2136 JVMWrapper("JVM_ConstantPoolGetIntAt");
2137 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2138 bounds_check(cp, index, CHECK_0);
2139 constantTag tag = cp->tag_at(index);
2140 if (!tag.is_int()) {
2141 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2142 }
2143 return cp->int_at(index);
2144 }
2145 JVM_END
2146
2147 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2148 {
2149 JVMWrapper("JVM_ConstantPoolGetLongAt");
2150 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2151 bounds_check(cp, index, CHECK_(0L));
2152 constantTag tag = cp->tag_at(index);
2153 if (!tag.is_long()) {
2154 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2155 }
2156 return cp->long_at(index);
2157 }
2158 JVM_END
2159
2160 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2161 {
2162 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2163 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2164 bounds_check(cp, index, CHECK_(0.0f));
2165 constantTag tag = cp->tag_at(index);
2166 if (!tag.is_float()) {
2167 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2168 }
2169 return cp->float_at(index);
2170 }
2171 JVM_END
2172
2173 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2174 {
2175 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2176 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2177 bounds_check(cp, index, CHECK_(0.0));
2178 constantTag tag = cp->tag_at(index);
2179 if (!tag.is_double()) {
2180 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2181 }
2182 return cp->double_at(index);
2183 }
2184 JVM_END
2185
2186 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2187 {
2188 JVMWrapper("JVM_ConstantPoolGetStringAt");
2189 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2190 bounds_check(cp, index, CHECK_NULL);
2191 constantTag tag = cp->tag_at(index);
2192 if (!tag.is_string()) {
2193 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2194 }
2195 oop str = cp->string_at(index, CHECK_NULL);
2196 return (jstring) JNIHandles::make_local(str);
2197 }
2198 JVM_END
2199
2200 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2201 {
2202 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2203 JvmtiVMObjectAllocEventCollector oam;
2204 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2205 bounds_check(cp, index, CHECK_NULL);
2206 constantTag tag = cp->tag_at(index);
2207 if (!tag.is_symbol()) {
2208 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2209 }
2210 Symbol* sym = cp->symbol_at(index);
2211 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2212 return (jstring) JNIHandles::make_local(str());
2213 }
2214 JVM_END
2215
2216
2217 // Assertion support. //////////////////////////////////////////////////////////
2218
2219 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2220 JVMWrapper("JVM_DesiredAssertionStatus");
2221 assert(cls != NULL, "bad class");
2222
2223 oop r = JNIHandles::resolve(cls);
2224 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2225 if (java_lang_Class::is_primitive(r)) return false;
2226
2227 Klass* k = java_lang_Class::as_Klass(r);
2228 assert(k->is_instance_klass(), "must be an instance klass");
2229 if (!k->is_instance_klass()) return false;
2230
2231 ResourceMark rm(THREAD);
2232 const char* name = k->name()->as_C_string();
2233 bool system_class = k->class_loader() == NULL;
2234 return JavaAssertions::enabled(name, system_class);
2235
2236 JVM_END
2237
2238
2239 // Return a new AssertionStatusDirectives object with the fields filled in with
2240 // command-line assertion arguments (i.e., -ea, -da).
2241 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2242 JVMWrapper("JVM_AssertionStatusDirectives");
2243 JvmtiVMObjectAllocEventCollector oam;
2244 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2245 return JNIHandles::make_local(env, asd);
2246 JVM_END
2247
2248 // Verification ////////////////////////////////////////////////////////////////////////////////
2249
2250 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2251
2252 // RedefineClasses support: bug 6214132 caused verification to fail.
2253 // All functions from this section should call the jvmtiThreadSate function:
2254 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2255 // The function returns a Klass* of the _scratch_class if the verifier
2256 // was invoked in the middle of the class redefinition.
2257 // Otherwise it returns its argument value which is the _the_class Klass*.
2258 // Please, refer to the description in the jvmtiThreadSate.hpp.
2259
2260 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2261 JVMWrapper("JVM_GetClassNameUTF");
2262 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 return k->name()->as_utf8();
2265 JVM_END
2266
2267
2268 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2269 JVMWrapper("JVM_GetClassCPTypes");
2270 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2272 // types will have length zero if this is not an InstanceKlass
2273 // (length is determined by call to JVM_GetClassCPEntriesCount)
2274 if (k->is_instance_klass()) {
2275 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2276 for (int index = cp->length() - 1; index >= 0; index--) {
2277 constantTag tag = cp->tag_at(index);
2278 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2279 }
2280 }
2281 JVM_END
2282
2283
2284 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2285 JVMWrapper("JVM_GetClassCPEntriesCount");
2286 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2287 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2288 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2289 JVM_END
2290
2291
2292 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2293 JVMWrapper("JVM_GetClassFieldsCount");
2294 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2295 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2296 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2297 JVM_END
2298
2299
2300 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2301 JVMWrapper("JVM_GetClassMethodsCount");
2302 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2303 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2304 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2305 JVM_END
2306
2307
2308 // The following methods, used for the verifier, are never called with
2309 // array klasses, so a direct cast to InstanceKlass is safe.
2310 // Typically, these methods are called in a loop with bounds determined
2311 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2312 // zero for arrays.
2313 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2314 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2315 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2316 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2317 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2318 int length = method->checked_exceptions_length();
2319 if (length > 0) {
2320 CheckedExceptionElement* table= method->checked_exceptions_start();
2321 for (int i = 0; i < length; i++) {
2322 exceptions[i] = table[i].class_cp_index;
2323 }
2324 }
2325 JVM_END
2326
2327
2328 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2329 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2330 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2331 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2332 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2333 return method->checked_exceptions_length();
2334 JVM_END
2335
2336
2337 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2338 JVMWrapper("JVM_GetMethodIxByteCode");
2339 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2340 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2341 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2342 memcpy(code, method->code_base(), method->code_size());
2343 JVM_END
2344
2345
2346 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2347 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2348 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2349 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2350 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2351 return method->code_size();
2352 JVM_END
2353
2354
2355 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2356 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2357 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2358 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2359 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2360 ExceptionTable extable(method);
2361 entry->start_pc = extable.start_pc(entry_index);
2362 entry->end_pc = extable.end_pc(entry_index);
2363 entry->handler_pc = extable.handler_pc(entry_index);
2364 entry->catchType = extable.catch_type_index(entry_index);
2365 JVM_END
2366
2367
2368 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2369 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2370 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2371 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2372 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2373 return method->exception_table_length();
2374 JVM_END
2375
2376
2377 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2378 JVMWrapper("JVM_GetMethodIxModifiers");
2379 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2380 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2381 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2382 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2383 JVM_END
2384
2385
2386 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2387 JVMWrapper("JVM_GetFieldIxModifiers");
2388 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2389 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2390 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2391 JVM_END
2392
2393
2394 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2395 JVMWrapper("JVM_GetMethodIxLocalsCount");
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 return method->max_locals();
2400 JVM_END
2401
2402
2403 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2404 JVMWrapper("JVM_GetMethodIxArgsSize");
2405 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2406 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2407 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2408 return method->size_of_parameters();
2409 JVM_END
2410
2411
2412 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2413 JVMWrapper("JVM_GetMethodIxMaxStack");
2414 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2415 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2416 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2417 return method->verifier_max_stack();
2418 JVM_END
2419
2420
2421 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2422 JVMWrapper("JVM_IsConstructorIx");
2423 ResourceMark rm(THREAD);
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2427 return method->name() == vmSymbols::object_initializer_name();
2428 JVM_END
2429
2430
2431 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2432 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2433 ResourceMark rm(THREAD);
2434 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2437 return method->is_overpass();
2438 JVM_END
2439
2440 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2441 JVMWrapper("JVM_GetMethodIxIxUTF");
2442 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2443 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2444 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2445 return method->name()->as_utf8();
2446 JVM_END
2447
2448
2449 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2450 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2451 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2452 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2453 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2454 return method->signature()->as_utf8();
2455 JVM_END
2456
2457 /**
2458 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2459 * read entries in the constant pool. Since the old verifier always
2460 * works on a copy of the code, it will not see any rewriting that
2461 * may possibly occur in the middle of verification. So it is important
2462 * that nothing it calls tries to use the cpCache instead of the raw
2463 * constant pool, so we must use cp->uncached_x methods when appropriate.
2464 */
2465 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2466 JVMWrapper("JVM_GetCPFieldNameUTF");
2467 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2468 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2469 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2470 switch (cp->tag_at(cp_index).value()) {
2471 case JVM_CONSTANT_Fieldref:
2472 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2473 default:
2474 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2475 }
2476 ShouldNotReachHere();
2477 return NULL;
2478 JVM_END
2479
2480
2481 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2482 JVMWrapper("JVM_GetCPMethodNameUTF");
2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2485 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2486 switch (cp->tag_at(cp_index).value()) {
2487 case JVM_CONSTANT_InterfaceMethodref:
2488 case JVM_CONSTANT_Methodref:
2489 case JVM_CONSTANT_NameAndType: // for invokedynamic
2490 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2491 default:
2492 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2493 }
2494 ShouldNotReachHere();
2495 return NULL;
2496 JVM_END
2497
2498
2499 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2500 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2501 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2502 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2503 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2504 switch (cp->tag_at(cp_index).value()) {
2505 case JVM_CONSTANT_InterfaceMethodref:
2506 case JVM_CONSTANT_Methodref:
2507 case JVM_CONSTANT_NameAndType: // for invokedynamic
2508 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2509 default:
2510 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2511 }
2512 ShouldNotReachHere();
2513 return NULL;
2514 JVM_END
2515
2516
2517 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2518 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2519 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2520 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2521 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2522 switch (cp->tag_at(cp_index).value()) {
2523 case JVM_CONSTANT_Fieldref:
2524 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2525 default:
2526 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2527 }
2528 ShouldNotReachHere();
2529 return NULL;
2530 JVM_END
2531
2532
2533 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2534 JVMWrapper("JVM_GetCPClassNameUTF");
2535 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2536 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2537 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2538 Symbol* classname = cp->klass_name_at(cp_index);
2539 return classname->as_utf8();
2540 JVM_END
2541
2542
2543 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2544 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2545 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2546 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2547 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2548 switch (cp->tag_at(cp_index).value()) {
2549 case JVM_CONSTANT_Fieldref: {
2550 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2551 Symbol* classname = cp->klass_name_at(class_index);
2552 return classname->as_utf8();
2553 }
2554 default:
2555 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2556 }
2557 ShouldNotReachHere();
2558 return NULL;
2559 JVM_END
2560
2561
2562 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2563 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2564 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2565 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2566 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2567 switch (cp->tag_at(cp_index).value()) {
2568 case JVM_CONSTANT_Methodref:
2569 case JVM_CONSTANT_InterfaceMethodref: {
2570 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2571 Symbol* classname = cp->klass_name_at(class_index);
2572 return classname->as_utf8();
2573 }
2574 default:
2575 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2576 }
2577 ShouldNotReachHere();
2578 return NULL;
2579 JVM_END
2580
2581
2582 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2583 JVMWrapper("JVM_GetCPFieldModifiers");
2584 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2585 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2586 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2587 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2588 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2589 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2590 switch (cp->tag_at(cp_index).value()) {
2591 case JVM_CONSTANT_Fieldref: {
2592 Symbol* name = cp->uncached_name_ref_at(cp_index);
2593 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2594 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2595 if (fs.name() == name && fs.signature() == signature) {
2596 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2597 }
2598 }
2599 return -1;
2600 }
2601 default:
2602 fatal("JVM_GetCPFieldModifiers: illegal constant");
2603 }
2604 ShouldNotReachHere();
2605 return 0;
2606 JVM_END
2607
2608
2609 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2610 JVMWrapper("JVM_GetCPMethodModifiers");
2611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2612 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2613 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2614 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2615 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2616 switch (cp->tag_at(cp_index).value()) {
2617 case JVM_CONSTANT_Methodref:
2618 case JVM_CONSTANT_InterfaceMethodref: {
2619 Symbol* name = cp->uncached_name_ref_at(cp_index);
2620 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2621 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2622 int methods_count = methods->length();
2623 for (int i = 0; i < methods_count; i++) {
2624 Method* method = methods->at(i);
2625 if (method->name() == name && method->signature() == signature) {
2626 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2627 }
2628 }
2629 return -1;
2630 }
2631 default:
2632 fatal("JVM_GetCPMethodModifiers: illegal constant");
2633 }
2634 ShouldNotReachHere();
2635 return 0;
2636 JVM_END
2637
2638
2639 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2640
2641 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2642 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2643 JVM_END
2644
2645
2646 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2647 JVMWrapper("JVM_IsSameClassPackage");
2648 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2649 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2650 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2651 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2652 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2653 JVM_END
2654
2655 // Printing support //////////////////////////////////////////////////
2656 extern "C" {
2657
2658 ATTRIBUTE_PRINTF(3, 0)
2659 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2660 // see bug 4399518, 4417214
2661 if ((intptr_t)count <= 0) return -1;
2662
2663 int result = vsnprintf(str, count, fmt, args);
2664 // Note: on truncation vsnprintf(3) on Unix returns numbers of
2665 // characters which would have been written had the buffer been large
2666 // enough; on Windows, it returns -1. We handle both cases here and
2667 // always return -1, and perform null termination.
2668 if ((result > 0 && (size_t)result >= count) || result == -1) {
2669 str[count - 1] = '\0';
2670 result = -1;
2671 }
2672
2673 return result;
2674 }
2675
2676 ATTRIBUTE_PRINTF(3, 0)
2677 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2678 va_list args;
2679 int len;
2680 va_start(args, fmt);
2681 len = jio_vsnprintf(str, count, fmt, args);
2682 va_end(args);
2683 return len;
2684 }
2685
2686 ATTRIBUTE_PRINTF(2,3)
2687 int jio_fprintf(FILE* f, const char *fmt, ...) {
2688 int len;
2689 va_list args;
2690 va_start(args, fmt);
2691 len = jio_vfprintf(f, fmt, args);
2692 va_end(args);
2693 return len;
2694 }
2695
2696 ATTRIBUTE_PRINTF(2, 0)
2697 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2698 if (Arguments::vfprintf_hook() != NULL) {
2699 return Arguments::vfprintf_hook()(f, fmt, args);
2700 } else {
2701 return vfprintf(f, fmt, args);
2702 }
2703 }
2704
2705 ATTRIBUTE_PRINTF(1, 2)
2706 JNIEXPORT int jio_printf(const char *fmt, ...) {
2707 int len;
2708 va_list args;
2709 va_start(args, fmt);
2710 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2711 va_end(args);
2712 return len;
2713 }
2714
2715
2716 // HotSpot specific jio method
2717 void jio_print(const char* s) {
2718 // Try to make this function as atomic as possible.
2719 if (Arguments::vfprintf_hook() != NULL) {
2720 jio_fprintf(defaultStream::output_stream(), "%s", s);
2721 } else {
2722 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2723 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2724 }
2725 }
2726
2727 } // Extern C
2728
2729 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2730
2731 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2732 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2733 // OSThread objects. The exception to this rule is when the target object is the thread
2734 // doing the operation, in which case we know that the thread won't exit until the
2735 // operation is done (all exits being voluntary). There are a few cases where it is
2736 // rather silly to do operations on yourself, like resuming yourself or asking whether
2737 // you are alive. While these can still happen, they are not subject to deadlocks if
2738 // the lock is held while the operation occurs (this is not the case for suspend, for
2739 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2740 // implementation is local to this file, we always lock Threads_lock for that one.
2741
2742 static void thread_entry(JavaThread* thread, TRAPS) {
2743 HandleMark hm(THREAD);
2744 Handle obj(THREAD, thread->threadObj());
2745 JavaValue result(T_VOID);
2746 JavaCalls::call_virtual(&result,
2747 obj,
2748 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2749 vmSymbols::run_method_name(),
2750 vmSymbols::void_method_signature(),
2751 THREAD);
2752 }
2753
2754
2755 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2756 JVMWrapper("JVM_StartThread");
2757 JavaThread *native_thread = NULL;
2758
2759 // We cannot hold the Threads_lock when we throw an exception,
2760 // due to rank ordering issues. Example: we might need to grab the
2761 // Heap_lock while we construct the exception.
2762 bool throw_illegal_thread_state = false;
2763
2764 // We must release the Threads_lock before we can post a jvmti event
2765 // in Thread::start.
2766 {
2767 // Ensure that the C++ Thread and OSThread structures aren't freed before
2768 // we operate.
2769 MutexLocker mu(Threads_lock);
2770
2771 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2772 // re-starting an already started thread, so we should usually find
2773 // that the JavaThread is null. However for a JNI attached thread
2774 // there is a small window between the Thread object being created
2775 // (with its JavaThread set) and the update to its threadStatus, so we
2776 // have to check for this
2777 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2778 throw_illegal_thread_state = true;
2779 } else {
2780 // We could also check the stillborn flag to see if this thread was already stopped, but
2781 // for historical reasons we let the thread detect that itself when it starts running
2782
2783 jlong size =
2784 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2785 // Allocate the C++ Thread structure and create the native thread. The
2786 // stack size retrieved from java is signed, but the constructor takes
2787 // size_t (an unsigned type), so avoid passing negative values which would
2788 // result in really large stacks.
2789 size_t sz = size > 0 ? (size_t) size : 0;
2790 native_thread = new JavaThread(&thread_entry, sz);
2791
2792 // At this point it may be possible that no osthread was created for the
2793 // JavaThread due to lack of memory. Check for this situation and throw
2794 // an exception if necessary. Eventually we may want to change this so
2795 // that we only grab the lock if the thread was created successfully -
2796 // then we can also do this check and throw the exception in the
2797 // JavaThread constructor.
2798 if (native_thread->osthread() != NULL) {
2799 // Note: the current thread is not being used within "prepare".
2800 native_thread->prepare(jthread);
2801 }
2802 }
2803 }
2804
2805 if (throw_illegal_thread_state) {
2806 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2807 }
2808
2809 assert(native_thread != NULL, "Starting null thread?");
2810
2811 if (native_thread->osthread() == NULL) {
2812 // No one should hold a reference to the 'native_thread'.
2813 delete native_thread;
2814 if (JvmtiExport::should_post_resource_exhausted()) {
2815 JvmtiExport::post_resource_exhausted(
2816 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2817 os::native_thread_creation_failed_msg());
2818 }
2819 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2820 os::native_thread_creation_failed_msg());
2821 }
2822
2823 Thread::start(native_thread);
2824
2825 JVM_END
2826
2827 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2828 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2829 // but is thought to be reliable and simple. In the case, where the receiver is the
2830 // same thread as the sender, no safepoint is needed.
2831 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2832 JVMWrapper("JVM_StopThread");
2833
2834 oop java_throwable = JNIHandles::resolve(throwable);
2835 if (java_throwable == NULL) {
2836 THROW(vmSymbols::java_lang_NullPointerException());
2837 }
2838 oop java_thread = JNIHandles::resolve_non_null(jthread);
2839 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2840 Events::log_exception(JavaThread::current(),
2841 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2842 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2843 // First check if thread is alive
2844 if (receiver != NULL) {
2845 // Check if exception is getting thrown at self (use oop equality, since the
2846 // target object might exit)
2847 if (java_thread == thread->threadObj()) {
2848 THROW_OOP(java_throwable);
2849 } else {
2850 // Enques a VM_Operation to stop all threads and then deliver the exception...
2851 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2852 }
2853 }
2854 else {
2855 // Either:
2856 // - target thread has not been started before being stopped, or
2857 // - target thread already terminated
2858 // We could read the threadStatus to determine which case it is
2859 // but that is overkill as it doesn't matter. We must set the
2860 // stillborn flag for the first case, and if the thread has already
2861 // exited setting this flag has no affect
2862 java_lang_Thread::set_stillborn(java_thread);
2863 }
2864 JVM_END
2865
2866
2867 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2868 JVMWrapper("JVM_IsThreadAlive");
2869
2870 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2871 return java_lang_Thread::is_alive(thread_oop);
2872 JVM_END
2873
2874
2875 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2876 JVMWrapper("JVM_SuspendThread");
2877 oop java_thread = JNIHandles::resolve_non_null(jthread);
2878 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2879
2880 if (receiver != NULL) {
2881 // thread has run and has not exited (still on threads list)
2882
2883 {
2884 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2885 if (receiver->is_external_suspend()) {
2886 // Don't allow nested external suspend requests. We can't return
2887 // an error from this interface so just ignore the problem.
2888 return;
2889 }
2890 if (receiver->is_exiting()) { // thread is in the process of exiting
2891 return;
2892 }
2893 receiver->set_external_suspend();
2894 }
2895
2896 // java_suspend() will catch threads in the process of exiting
2897 // and will ignore them.
2898 receiver->java_suspend();
2899
2900 // It would be nice to have the following assertion in all the
2901 // time, but it is possible for a racing resume request to have
2902 // resumed this thread right after we suspended it. Temporarily
2903 // enable this assertion if you are chasing a different kind of
2904 // bug.
2905 //
2906 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2907 // receiver->is_being_ext_suspended(), "thread is not suspended");
2908 }
2909 JVM_END
2910
2911
2912 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2913 JVMWrapper("JVM_ResumeThread");
2914 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2915 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2916 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2917 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2918 // looks at it.
2919 MutexLocker ml(Threads_lock);
2920 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2921 if (thr != NULL) {
2922 // the thread has run and is not in the process of exiting
2923 thr->java_resume();
2924 }
2925 JVM_END
2926
2927
2928 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2929 JVMWrapper("JVM_SetThreadPriority");
2930 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2931 MutexLocker ml(Threads_lock);
2932 oop java_thread = JNIHandles::resolve_non_null(jthread);
2933 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2934 JavaThread* thr = java_lang_Thread::thread(java_thread);
2935 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2936 Thread::set_priority(thr, (ThreadPriority)prio);
2937 }
2938 JVM_END
2939
2940
2941 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2942 JVMWrapper("JVM_Yield");
2943 if (os::dont_yield()) return;
2944 HOTSPOT_THREAD_YIELD();
2945
2946 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2947 // Critical for similar threading behaviour
2948 if (ConvertYieldToSleep) {
2949 os::sleep(thread, MinSleepInterval, false);
2950 } else {
2951 os::naked_yield();
2952 }
2953 JVM_END
2954
2955
2956 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2957 JVMWrapper("JVM_Sleep");
2958
2959 if (millis < 0) {
2960 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2961 }
2962
2963 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2964 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2965 }
2966
2967 // Save current thread state and restore it at the end of this block.
2968 // And set new thread state to SLEEPING.
2969 JavaThreadSleepState jtss(thread);
2970
2971 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2972
2973 EventThreadSleep event;
2974
2975 if (millis == 0) {
2976 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2977 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2978 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2979 // for SOLARIS
2980 if (ConvertSleepToYield) {
2981 os::naked_yield();
2982 } else {
2983 ThreadState old_state = thread->osthread()->get_state();
2984 thread->osthread()->set_state(SLEEPING);
2985 os::sleep(thread, MinSleepInterval, false);
2986 thread->osthread()->set_state(old_state);
2987 }
2988 } else {
2989 ThreadState old_state = thread->osthread()->get_state();
2990 thread->osthread()->set_state(SLEEPING);
2991 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2992 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2993 // us while we were sleeping. We do not overwrite those.
2994 if (!HAS_PENDING_EXCEPTION) {
2995 if (event.should_commit()) {
2996 event.set_time(millis);
2997 event.commit();
2998 }
2999 HOTSPOT_THREAD_SLEEP_END(1);
3000
3001 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3002 // to properly restore the thread state. That's likely wrong.
3003 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3004 }
3005 }
3006 thread->osthread()->set_state(old_state);
3007 }
3008 if (event.should_commit()) {
3009 event.set_time(millis);
3010 event.commit();
3011 }
3012 HOTSPOT_THREAD_SLEEP_END(0);
3013 JVM_END
3014
3015 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3016 JVMWrapper("JVM_CurrentThread");
3017 oop jthread = thread->threadObj();
3018 assert (thread != NULL, "no current thread!");
3019 return JNIHandles::make_local(env, jthread);
3020 JVM_END
3021
3022
3023 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3024 JVMWrapper("JVM_CountStackFrames");
3025
3026 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3027 oop java_thread = JNIHandles::resolve_non_null(jthread);
3028 bool throw_illegal_thread_state = false;
3029 int count = 0;
3030
3031 {
3032 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3033 // We need to re-resolve the java_thread, since a GC might have happened during the
3034 // acquire of the lock
3035 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3036
3037 if (thr == NULL) {
3038 // do nothing
3039 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3040 // Check whether this java thread has been suspended already. If not, throws
3041 // IllegalThreadStateException. We defer to throw that exception until
3042 // Threads_lock is released since loading exception class has to leave VM.
3043 // The correct way to test a thread is actually suspended is
3044 // wait_for_ext_suspend_completion(), but we can't call that while holding
3045 // the Threads_lock. The above tests are sufficient for our purposes
3046 // provided the walkability of the stack is stable - which it isn't
3047 // 100% but close enough for most practical purposes.
3048 throw_illegal_thread_state = true;
3049 } else {
3050 // Count all java activation, i.e., number of vframes
3051 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3052 // Native frames are not counted
3053 if (!vfst.method()->is_native()) count++;
3054 }
3055 }
3056 }
3057
3058 if (throw_illegal_thread_state) {
3059 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3060 "this thread is not suspended");
3061 }
3062 return count;
3063 JVM_END
3064
3065 // Consider: A better way to implement JVM_Interrupt() is to acquire
3066 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3067 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3068 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3069 // outside the critical section. Threads_lock is hot so we want to minimize
3070 // the hold-time. A cleaner interface would be to decompose interrupt into
3071 // two steps. The 1st phase, performed under Threads_lock, would return
3072 // a closure that'd be invoked after Threads_lock was dropped.
3073 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3074 // admit spurious wakeups.
3075
3076 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3077 JVMWrapper("JVM_Interrupt");
3078
3079 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3080 oop java_thread = JNIHandles::resolve_non_null(jthread);
3081 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3082 // We need to re-resolve the java_thread, since a GC might have happened during the
3083 // acquire of the lock
3084 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3085 if (thr != NULL) {
3086 Thread::interrupt(thr);
3087 }
3088 JVM_END
3089
3090
3091 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3092 JVMWrapper("JVM_IsInterrupted");
3093
3094 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3095 oop java_thread = JNIHandles::resolve_non_null(jthread);
3096 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3097 // We need to re-resolve the java_thread, since a GC might have happened during the
3098 // acquire of the lock
3099 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3100 if (thr == NULL) {
3101 return JNI_FALSE;
3102 } else {
3103 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3104 }
3105 JVM_END
3106
3107
3108 // Return true iff the current thread has locked the object passed in
3109
3110 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3111 JVMWrapper("JVM_HoldsLock");
3112 assert(THREAD->is_Java_thread(), "sanity check");
3113 if (obj == NULL) {
3114 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3115 }
3116 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3117 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3118 JVM_END
3119
3120
3121 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3122 JVMWrapper("JVM_DumpAllStacks");
3123 VM_PrintThreads op;
3124 VMThread::execute(&op);
3125 if (JvmtiExport::should_post_data_dump()) {
3126 JvmtiExport::post_data_dump();
3127 }
3128 JVM_END
3129
3130 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3131 JVMWrapper("JVM_SetNativeThreadName");
3132 ResourceMark rm(THREAD);
3133 oop java_thread = JNIHandles::resolve_non_null(jthread);
3134 JavaThread* thr = java_lang_Thread::thread(java_thread);
3135 // Thread naming only supported for the current thread, doesn't work for
3136 // target threads.
3137 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3138 // we don't set the name of an attached thread to avoid stepping
3139 // on other programs
3140 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3141 os::set_native_thread_name(thread_name);
3142 }
3143 JVM_END
3144
3145 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3146
3147 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3148 assert(jthread->is_Java_thread(), "must be a Java thread");
3149 if (jthread->privileged_stack_top() == NULL) return false;
3150 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3151 oop loader = jthread->privileged_stack_top()->class_loader();
3152 if (loader == NULL) return true;
3153 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3154 if (trusted) return true;
3155 }
3156 return false;
3157 }
3158
3159 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3160 JVMWrapper("JVM_CurrentLoadedClass");
3161 ResourceMark rm(THREAD);
3162
3163 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3164 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3165 bool trusted = is_trusted_frame(thread, &vfst);
3166 if (trusted) return NULL;
3167
3168 Method* m = vfst.method();
3169 if (!m->is_native()) {
3170 InstanceKlass* holder = m->method_holder();
3171 oop loader = holder->class_loader();
3172 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3173 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3174 }
3175 }
3176 }
3177 return NULL;
3178 JVM_END
3179
3180
3181 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3182 JVMWrapper("JVM_CurrentClassLoader");
3183 ResourceMark rm(THREAD);
3184
3185 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3186
3187 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3188 bool trusted = is_trusted_frame(thread, &vfst);
3189 if (trusted) return NULL;
3190
3191 Method* m = vfst.method();
3192 if (!m->is_native()) {
3193 InstanceKlass* holder = m->method_holder();
3194 assert(holder->is_klass(), "just checking");
3195 oop loader = holder->class_loader();
3196 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3197 return JNIHandles::make_local(env, loader);
3198 }
3199 }
3200 }
3201 return NULL;
3202 JVM_END
3203
3204
3205 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3206 JVMWrapper("JVM_GetClassContext");
3207 ResourceMark rm(THREAD);
3208 JvmtiVMObjectAllocEventCollector oam;
3209 vframeStream vfst(thread);
3210
3211 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3212 // This must only be called from SecurityManager.getClassContext
3213 Method* m = vfst.method();
3214 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3215 m->name() == vmSymbols::getClassContext_name() &&
3216 m->signature() == vmSymbols::void_class_array_signature())) {
3217 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3218 }
3219 }
3220
3221 // Collect method holders
3222 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3223 for (; !vfst.at_end(); vfst.security_next()) {
3224 Method* m = vfst.method();
3225 // Native frames are not returned
3226 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3227 Klass* holder = m->method_holder();
3228 assert(holder->is_klass(), "just checking");
3229 klass_array->append(holder);
3230 }
3231 }
3232
3233 // Create result array of type [Ljava/lang/Class;
3234 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3235 // Fill in mirrors corresponding to method holders
3236 for (int i = 0; i < klass_array->length(); i++) {
3237 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3238 }
3239
3240 return (jobjectArray) JNIHandles::make_local(env, result);
3241 JVM_END
3242
3243
3244 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3245 JVMWrapper("JVM_ClassDepth");
3246 ResourceMark rm(THREAD);
3247 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3248 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3249
3250 const char* str = java_lang_String::as_utf8_string(class_name_str());
3251 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3252 if (class_name_sym == NULL) {
3253 return -1;
3254 }
3255
3256 int depth = 0;
3257
3258 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3259 if (!vfst.method()->is_native()) {
3260 InstanceKlass* holder = vfst.method()->method_holder();
3261 assert(holder->is_klass(), "just checking");
3262 if (holder->name() == class_name_sym) {
3263 return depth;
3264 }
3265 depth++;
3266 }
3267 }
3268 return -1;
3269 JVM_END
3270
3271
3272 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3273 JVMWrapper("JVM_ClassLoaderDepth");
3274 ResourceMark rm(THREAD);
3275 int depth = 0;
3276 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3277 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3278 bool trusted = is_trusted_frame(thread, &vfst);
3279 if (trusted) return -1;
3280
3281 Method* m = vfst.method();
3282 if (!m->is_native()) {
3283 InstanceKlass* holder = m->method_holder();
3284 assert(holder->is_klass(), "just checking");
3285 oop loader = holder->class_loader();
3286 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3287 return depth;
3288 }
3289 depth++;
3290 }
3291 }
3292 return -1;
3293 JVM_END
3294
3295
3296 // java.lang.Package ////////////////////////////////////////////////////////////////
3297
3298
3299 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3300 JVMWrapper("JVM_GetSystemPackage");
3301 ResourceMark rm(THREAD);
3302 JvmtiVMObjectAllocEventCollector oam;
3303 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3304 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3305 return (jstring) JNIHandles::make_local(result);
3306 JVM_END
3307
3308
3309 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3310 JVMWrapper("JVM_GetSystemPackages");
3311 JvmtiVMObjectAllocEventCollector oam;
3312 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3313 return (jobjectArray) JNIHandles::make_local(result);
3314 JVM_END
3315
3316
3317 // ObjectInputStream ///////////////////////////////////////////////////////////////
3318
3319 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3320 if (current_class == NULL) {
3321 return true;
3322 }
3323 if ((current_class == field_class) || access.is_public()) {
3324 return true;
3325 }
3326
3327 if (access.is_protected()) {
3328 // See if current_class is a subclass of field_class
3329 if (current_class->is_subclass_of(field_class)) {
3330 return true;
3331 }
3332 }
3333
3334 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3335 }
3336
3337 // Return the first non-null class loader up the execution stack, or null
3338 // if only code from the null class loader is on the stack.
3339
3340 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3341 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3342 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3343 oop loader = vfst.method()->method_holder()->class_loader();
3344 if (loader != NULL) {
3345 return JNIHandles::make_local(env, loader);
3346 }
3347 }
3348 return NULL;
3349 JVM_END
3350
3351
3352 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3353
3354
3355 // resolve array handle and check arguments
3356 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3357 if (arr == NULL) {
3358 THROW_0(vmSymbols::java_lang_NullPointerException());
3359 }
3360 oop a = JNIHandles::resolve_non_null(arr);
3361 if (!a->is_array()) {
3362 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3363 } else if (type_array_only && !a->is_typeArray()) {
3364 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3365 }
3366 return arrayOop(a);
3367 }
3368
3369
3370 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3371 JVMWrapper("JVM_GetArrayLength");
3372 arrayOop a = check_array(env, arr, false, CHECK_0);
3373 return a->length();
3374 JVM_END
3375
3376
3377 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3378 JVMWrapper("JVM_Array_Get");
3379 JvmtiVMObjectAllocEventCollector oam;
3380 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3381 jvalue value;
3382 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3383 oop box = Reflection::box(&value, type, CHECK_NULL);
3384 return JNIHandles::make_local(env, box);
3385 JVM_END
3386
3387
3388 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3389 JVMWrapper("JVM_GetPrimitiveArrayElement");
3390 jvalue value;
3391 value.i = 0; // to initialize value before getting used in CHECK
3392 arrayOop a = check_array(env, arr, true, CHECK_(value));
3393 assert(a->is_typeArray(), "just checking");
3394 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3395 BasicType wide_type = (BasicType) wCode;
3396 if (type != wide_type) {
3397 Reflection::widen(&value, type, wide_type, CHECK_(value));
3398 }
3399 return value;
3400 JVM_END
3401
3402
3403 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3404 JVMWrapper("JVM_SetArrayElement");
3405 arrayOop a = check_array(env, arr, false, CHECK);
3406 oop box = JNIHandles::resolve(val);
3407 jvalue value;
3408 value.i = 0; // to initialize value before getting used in CHECK
3409 BasicType value_type;
3410 if (a->is_objArray()) {
3411 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3412 value_type = Reflection::unbox_for_regular_object(box, &value);
3413 } else {
3414 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3415 }
3416 Reflection::array_set(&value, a, index, value_type, CHECK);
3417 JVM_END
3418
3419
3420 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3421 JVMWrapper("JVM_SetPrimitiveArrayElement");
3422 arrayOop a = check_array(env, arr, true, CHECK);
3423 assert(a->is_typeArray(), "just checking");
3424 BasicType value_type = (BasicType) vCode;
3425 Reflection::array_set(&v, a, index, value_type, CHECK);
3426 JVM_END
3427
3428
3429 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3430 JVMWrapper("JVM_NewArray");
3431 JvmtiVMObjectAllocEventCollector oam;
3432 oop element_mirror = JNIHandles::resolve(eltClass);
3433 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3434 return JNIHandles::make_local(env, result);
3435 JVM_END
3436
3437
3438 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3439 JVMWrapper("JVM_NewMultiArray");
3440 JvmtiVMObjectAllocEventCollector oam;
3441 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3442 oop element_mirror = JNIHandles::resolve(eltClass);
3443 assert(dim_array->is_typeArray(), "just checking");
3444 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3445 return JNIHandles::make_local(env, result);
3446 JVM_END
3447
3448
3449 // Library support ///////////////////////////////////////////////////////////////////////////
3450
3451 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3452 //%note jvm_ct
3453 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3454 char ebuf[1024];
3455 void *load_result;
3456 {
3457 ThreadToNativeFromVM ttnfvm(thread);
3458 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3459 }
3460 if (load_result == NULL) {
3461 char msg[1024];
3462 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3463 // Since 'ebuf' may contain a string encoded using
3464 // platform encoding scheme, we need to pass
3465 // Exceptions::unsafe_to_utf8 to the new_exception method
3466 // as the last argument. See bug 6367357.
3467 Handle h_exception =
3468 Exceptions::new_exception(thread,
3469 vmSymbols::java_lang_UnsatisfiedLinkError(),
3470 msg, Exceptions::unsafe_to_utf8);
3471
3472 THROW_HANDLE_0(h_exception);
3473 }
3474 return load_result;
3475 JVM_END
3476
3477
3478 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3479 JVMWrapper("JVM_UnloadLibrary");
3480 os::dll_unload(handle);
3481 JVM_END
3482
3483
3484 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3485 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3486 return os::dll_lookup(handle, name);
3487 JVM_END
3488
3489
3490 // JNI version ///////////////////////////////////////////////////////////////////////////////
3491
3492 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3493 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3494 return Threads::is_supported_jni_version_including_1_1(version);
3495 JVM_END
3496
3497
3498 // String support ///////////////////////////////////////////////////////////////////////////
3499
3500 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3501 JVMWrapper("JVM_InternString");
3502 JvmtiVMObjectAllocEventCollector oam;
3503 if (str == NULL) return NULL;
3504 oop string = JNIHandles::resolve_non_null(str);
3505 oop result = StringTable::intern(string, CHECK_NULL);
3506 return (jstring) JNIHandles::make_local(env, result);
3507 JVM_END
3508
3509
3510 // Raw monitor support //////////////////////////////////////////////////////////////////////
3511
3512 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3513 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3514 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3515 // that only works with java threads.
3516
3517
3518 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3519 VM_Exit::block_if_vm_exited();
3520 JVMWrapper("JVM_RawMonitorCreate");
3521 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3522 }
3523
3524
3525 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3526 VM_Exit::block_if_vm_exited();
3527 JVMWrapper("JVM_RawMonitorDestroy");
3528 delete ((Mutex*) mon);
3529 }
3530
3531
3532 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3533 VM_Exit::block_if_vm_exited();
3534 JVMWrapper("JVM_RawMonitorEnter");
3535 ((Mutex*) mon)->jvm_raw_lock();
3536 return 0;
3537 }
3538
3539
3540 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3541 VM_Exit::block_if_vm_exited();
3542 JVMWrapper("JVM_RawMonitorExit");
3543 ((Mutex*) mon)->jvm_raw_unlock();
3544 }
3545
3546
3547 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3548
3549 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3550 Handle loader, Handle protection_domain,
3551 jboolean throwError, TRAPS) {
3552 // Security Note:
3553 // The Java level wrapper will perform the necessary security check allowing
3554 // us to pass the NULL as the initiating class loader. The VM is responsible for
3555 // the checkPackageAccess relative to the initiating class loader via the
3556 // protection_domain. The protection_domain is passed as NULL by the java code
3557 // if there is no security manager in 3-arg Class.forName().
3558 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3559
3560 KlassHandle klass_handle(THREAD, klass);
3561 // Check if we should initialize the class
3562 if (init && klass_handle->is_instance_klass()) {
3563 klass_handle->initialize(CHECK_NULL);
3564 }
3565 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3566 }
3567
3568
3569 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3570
3571 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3572 JVMWrapper("JVM_InvokeMethod");
3573 Handle method_handle;
3574 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3575 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3576 Handle receiver(THREAD, JNIHandles::resolve(obj));
3577 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3578 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3579 jobject res = JNIHandles::make_local(env, result);
3580 if (JvmtiExport::should_post_vm_object_alloc()) {
3581 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3582 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3583 if (java_lang_Class::is_primitive(ret_type)) {
3584 // Only for primitive type vm allocates memory for java object.
3585 // See box() method.
3586 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3587 }
3588 }
3589 return res;
3590 } else {
3591 THROW_0(vmSymbols::java_lang_StackOverflowError());
3592 }
3593 JVM_END
3594
3595
3596 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3597 JVMWrapper("JVM_NewInstanceFromConstructor");
3598 oop constructor_mirror = JNIHandles::resolve(c);
3599 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3600 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3601 jobject res = JNIHandles::make_local(env, result);
3602 if (JvmtiExport::should_post_vm_object_alloc()) {
3603 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3604 }
3605 return res;
3606 JVM_END
3607
3608 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3609
3610 JVM_LEAF(jboolean, JVM_SupportsCX8())
3611 JVMWrapper("JVM_SupportsCX8");
3612 return VM_Version::supports_cx8();
3613 JVM_END
3614
3615 // Returns an array of all live Thread objects (VM internal JavaThreads,
3616 // jvmti agent threads, and JNI attaching threads are skipped)
3617 // See CR 6404306 regarding JNI attaching threads
3618 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3619 ResourceMark rm(THREAD);
3620 ThreadsListEnumerator tle(THREAD, false, false);
3621 JvmtiVMObjectAllocEventCollector oam;
3622
3623 int num_threads = tle.num_threads();
3624 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3625 objArrayHandle threads_ah(THREAD, r);
3626
3627 for (int i = 0; i < num_threads; i++) {
3628 Handle h = tle.get_threadObj(i);
3629 threads_ah->obj_at_put(i, h());
3630 }
3631
3632 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3633 JVM_END
3634
3635
3636 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3637 // Return StackTraceElement[][], each element is the stack trace of a thread in
3638 // the corresponding entry in the given threads array
3639 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3640 JVMWrapper("JVM_DumpThreads");
3641 JvmtiVMObjectAllocEventCollector oam;
3642
3643 // Check if threads is null
3644 if (threads == NULL) {
3645 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3646 }
3647
3648 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3649 objArrayHandle ah(THREAD, a);
3650 int num_threads = ah->length();
3651 // check if threads is non-empty array
3652 if (num_threads == 0) {
3653 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3654 }
3655
3656 // check if threads is not an array of objects of Thread class
3657 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3658 if (k != SystemDictionary::Thread_klass()) {
3659 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3660 }
3661
3662 ResourceMark rm(THREAD);
3663
3664 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3665 for (int i = 0; i < num_threads; i++) {
3666 oop thread_obj = ah->obj_at(i);
3667 instanceHandle h(THREAD, (instanceOop) thread_obj);
3668 thread_handle_array->append(h);
3669 }
3670
3671 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3672 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3673
3674 JVM_END
3675
3676 // JVM monitoring and management support
3677 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3678 return Management::get_jmm_interface(version);
3679 JVM_END
3680
3681 // com.sun.tools.attach.VirtualMachine agent properties support
3682 //
3683 // Initialize the agent properties with the properties maintained in the VM
3684 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3685 JVMWrapper("JVM_InitAgentProperties");
3686 ResourceMark rm;
3687
3688 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3689
3690 PUTPROP(props, "sun.java.command", Arguments::java_command());
3691 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3692 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3693 return properties;
3694 JVM_END
3695
3696 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3697 {
3698 JVMWrapper("JVM_GetEnclosingMethodInfo");
3699 JvmtiVMObjectAllocEventCollector oam;
3700
3701 if (ofClass == NULL) {
3702 return NULL;
3703 }
3704 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3705 // Special handling for primitive objects
3706 if (java_lang_Class::is_primitive(mirror())) {
3707 return NULL;
3708 }
3709 Klass* k = java_lang_Class::as_Klass(mirror());
3710 if (!k->is_instance_klass()) {
3711 return NULL;
3712 }
3713 instanceKlassHandle ik_h(THREAD, k);
3714 int encl_method_class_idx = ik_h->enclosing_method_class_index();
3715 if (encl_method_class_idx == 0) {
3716 return NULL;
3717 }
3718 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3719 objArrayHandle dest(THREAD, dest_o);
3720 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3721 dest->obj_at_put(0, enc_k->java_mirror());
3722 int encl_method_method_idx = ik_h->enclosing_method_method_index();
3723 if (encl_method_method_idx != 0) {
3724 Symbol* sym = ik_h->constants()->symbol_at(
3725 extract_low_short_from_int(
3726 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3727 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3728 dest->obj_at_put(1, str());
3729 sym = ik_h->constants()->symbol_at(
3730 extract_high_short_from_int(
3731 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3732 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3733 dest->obj_at_put(2, str());
3734 }
3735 return (jobjectArray) JNIHandles::make_local(dest());
3736 }
3737 JVM_END
3738
3739 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3740 {
3741 memset(info, 0, info_size);
3742
3743 info->jvm_version = Abstract_VM_Version::jvm_version();
3744 info->update_version = 0; /* 0 in HotSpot Express VM */
3745 info->special_update_version = 0; /* 0 in HotSpot Express VM */
3746
3747 // when we add a new capability in the jvm_version_info struct, we should also
3748 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3749 // counter defined in runtimeService.cpp.
3750 info->is_attachable = AttachListener::is_attach_supported();
3751 }
3752 JVM_END