1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderData.inline.hpp"
30 #include "classfile/javaAssertions.hpp"
31 #include "classfile/javaClasses.inline.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/stringTable.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/vmSymbols.hpp"
38 #include "gc/shared/collectedHeap.inline.hpp"
39 #include "interpreter/bytecode.hpp"
40 #include "jfr/jfrEvents.hpp"
41 #include "logging/log.hpp"
42 #include "memory/heapShared.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/referenceType.hpp"
45 #include "memory/resourceArea.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/access.inline.hpp"
48 #include "oops/fieldStreams.hpp"
49 #include "oops/instanceKlass.hpp"
50 #include "oops/method.hpp"
51 #include "oops/objArrayKlass.hpp"
52 #include "oops/objArrayOop.inline.hpp"
53 #include "oops/oop.inline.hpp"
54 #include "prims/jvm_misc.hpp"
55 #include "prims/jvmtiExport.hpp"
56 #include "prims/jvmtiThreadState.hpp"
57 #include "prims/nativeLookup.hpp"
58 #include "prims/stackwalk.hpp"
59 #include "runtime/arguments.hpp"
60 #include "runtime/atomic.hpp"
61 #include "runtime/handles.inline.hpp"
62 #include "runtime/init.hpp"
63 #include "runtime/interfaceSupport.inline.hpp"
64 #include "runtime/deoptimization.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/jfieldIDWorkaround.hpp"
68 #include "runtime/jniHandles.inline.hpp"
69 #include "runtime/orderAccess.hpp"
70 #include "runtime/os.inline.hpp"
71 #include "runtime/perfData.hpp"
72 #include "runtime/reflection.hpp"
73 #include "runtime/thread.inline.hpp"
74 #include "runtime/threadSMR.hpp"
75 #include "runtime/vframe.inline.hpp"
76 #include "runtime/vmOperations.hpp"
77 #include "runtime/vm_version.hpp"
78 #include "services/attachListener.hpp"
79 #include "services/management.hpp"
80 #include "services/threadService.hpp"
81 #include "utilities/copy.hpp"
82 #include "utilities/defaultStream.hpp"
83 #include "utilities/dtrace.hpp"
84 #include "utilities/events.hpp"
85 #include "utilities/histogram.hpp"
86 #include "utilities/macros.hpp"
87 #include "utilities/utf8.hpp"
88 #if INCLUDE_CDS
89 #include "classfile/systemDictionaryShared.hpp"
90 #endif
91
92 #include <errno.h>
93
94 /*
95 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
96 such ctors and calls MUST NOT come between an oop declaration/init and its
97 usage because if objects are move this may cause various memory stomps, bus
98 errors and segfaults. Here is a cookbook for causing so called "naked oop
99 failures":
100
101 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
102 JVMWrapper("JVM_GetClassDeclaredFields");
103
104 // Object address to be held directly in mirror & not visible to GC
105 oop mirror = JNIHandles::resolve_non_null(ofClass);
106
107 // If this ctor can hit a safepoint, moving objects around, then
108 ComplexConstructor foo;
109
110 // Boom! mirror may point to JUNK instead of the intended object
111 (some dereference of mirror)
112
113 // Here's another call that may block for GC, making mirror stale
114 MutexLocker ml(some_lock);
115
116 // And here's an initializer that can result in a stale oop
117 // all in one step.
118 oop o = call_that_can_throw_exception(TRAPS);
119
120
121 The solution is to keep the oop declaration BELOW the ctor or function
122 call that might cause a GC, do another resolve to reassign the oop, or
123 consider use of a Handle instead of an oop so there is immunity from object
124 motion. But note that the "QUICK" entries below do not have a handlemark
125 and thus can only support use of handles passed in.
126 */
127
128 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
129 ResourceMark rm;
130 int line_number = -1;
131 const char * source_file = NULL;
132 const char * trace = "explicit";
133 InstanceKlass* caller = NULL;
134 JavaThread* jthread = JavaThread::current();
135 if (jthread->has_last_Java_frame()) {
136 vframeStream vfst(jthread);
137
138 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
139 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
140 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
141 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
142 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
143
144 Method* last_caller = NULL;
145
146 while (!vfst.at_end()) {
147 Method* m = vfst.method();
148 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
149 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
150 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
151 break;
152 }
153 last_caller = m;
154 vfst.next();
155 }
156 // if this is called from Class.forName0 and that is called from Class.forName,
157 // then print the caller of Class.forName. If this is Class.loadClass, then print
158 // that caller, otherwise keep quiet since this should be picked up elsewhere.
159 bool found_it = false;
160 if (!vfst.at_end() &&
161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName0_name()) {
163 vfst.next();
164 if (!vfst.at_end() &&
165 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
166 vfst.method()->name() == vmSymbols::forName_name()) {
167 vfst.next();
168 found_it = true;
169 }
170 } else if (last_caller != NULL &&
171 last_caller->method_holder()->name() ==
172 vmSymbols::java_lang_ClassLoader() &&
173 last_caller->name() == vmSymbols::loadClass_name()) {
174 found_it = true;
175 } else if (!vfst.at_end()) {
176 if (vfst.method()->is_native()) {
177 // JNI call
178 found_it = true;
179 }
180 }
181 if (found_it && !vfst.at_end()) {
182 // found the caller
183 caller = vfst.method()->method_holder();
184 line_number = vfst.method()->line_number_from_bci(vfst.bci());
185 if (line_number == -1) {
186 // show method name if it's a native method
187 trace = vfst.method()->name_and_sig_as_C_string();
188 }
189 Symbol* s = caller->source_file_name();
190 if (s != NULL) {
191 source_file = s->as_C_string();
192 }
193 }
194 }
195 if (caller != NULL) {
196 if (to_class != caller) {
197 const char * from = caller->external_name();
198 const char * to = to_class->external_name();
199 // print in a single call to reduce interleaving between threads
200 if (source_file != NULL) {
201 log_debug(class, resolve)("%s %s %s:%d (%s)", from, to, source_file, line_number, trace);
202 } else {
203 log_debug(class, resolve)("%s %s (%s)", from, to, trace);
204 }
205 }
206 }
207 }
208
209 void trace_class_resolution(Klass* to_class) {
210 EXCEPTION_MARK;
211 trace_class_resolution_impl(to_class, THREAD);
212 if (HAS_PENDING_EXCEPTION) {
213 CLEAR_PENDING_EXCEPTION;
214 }
215 }
216
217 // Wrapper to trace JVM functions
218
219 #ifdef ASSERT
220 Histogram* JVMHistogram;
221 volatile int JVMHistogram_lock = 0;
222
223 class JVMHistogramElement : public HistogramElement {
224 public:
225 JVMHistogramElement(const char* name);
226 };
227
228 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
229 _name = elementName;
230 uintx count = 0;
231
232 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
233 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
234 count +=1;
235 if ( (WarnOnStalledSpinLock > 0)
236 && (count % WarnOnStalledSpinLock == 0)) {
237 warning("JVMHistogram_lock seems to be stalled");
238 }
239 }
240 }
241
242 if(JVMHistogram == NULL)
243 JVMHistogram = new Histogram("JVM Call Counts",100);
244
245 JVMHistogram->add_element(this);
246 Atomic::dec(&JVMHistogram_lock);
247 }
248
249 #define JVMCountWrapper(arg) \
250 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
251 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
252
253 #define JVMWrapper(arg) JVMCountWrapper(arg);
254 #else
255 #define JVMWrapper(arg)
256 #endif
257
258
259 // Interface version /////////////////////////////////////////////////////////////////////
260
261
262 JVM_LEAF(jint, JVM_GetInterfaceVersion())
263 return JVM_INTERFACE_VERSION;
264 JVM_END
265
266
267 // java.lang.System //////////////////////////////////////////////////////////////////////
268
269
270 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
271 JVMWrapper("JVM_CurrentTimeMillis");
272 return os::javaTimeMillis();
273 JVM_END
274
275 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
276 JVMWrapper("JVM_NanoTime");
277 return os::javaTimeNanos();
278 JVM_END
279
280 // The function below is actually exposed by jdk.internal.misc.VM and not
281 // java.lang.System, but we choose to keep it here so that it stays next
282 // to JVM_CurrentTimeMillis and JVM_NanoTime
283
284 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
285 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
286
287 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
288 JVMWrapper("JVM_GetNanoTimeAdjustment");
289 jlong seconds;
290 jlong nanos;
291
292 os::javaTimeSystemUTC(seconds, nanos);
293
294 // We're going to verify that the result can fit in a long.
295 // For that we need the difference in seconds between 'seconds'
296 // and 'offset_secs' to be such that:
297 // |seconds - offset_secs| < (2^63/10^9)
298 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
299 // which makes |seconds - offset_secs| < 2^33
300 // and we will prefer +/- 2^32 as the maximum acceptable diff
301 // as 2^32 has a more natural feel than 2^33...
302 //
303 // So if |seconds - offset_secs| >= 2^32 - we return a special
304 // sentinel value (-1) which the caller should take as an
305 // exception value indicating that the offset given to us is
306 // too far from range of the current time - leading to too big
307 // a nano adjustment. The caller is expected to recover by
308 // computing a more accurate offset and calling this method
309 // again. (For the record 2^32 secs is ~136 years, so that
310 // should rarely happen)
311 //
312 jlong diff = seconds - offset_secs;
313 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
314 return -1; // sentinel value: the offset is too far off the target
315 }
316
317 // return the adjustment. If you compute a time by adding
318 // this number of nanoseconds along with the number of seconds
319 // in the offset you should get the current UTC time.
320 return (diff * (jlong)1000000000) + nanos;
321 JVM_END
322
323 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
324 jobject dst, jint dst_pos, jint length))
325 JVMWrapper("JVM_ArrayCopy");
326 // Check if we have null pointers
327 if (src == NULL || dst == NULL) {
328 THROW(vmSymbols::java_lang_NullPointerException());
329 }
330 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
331 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
332 assert(oopDesc::is_oop(s), "JVM_ArrayCopy: src not an oop");
333 assert(oopDesc::is_oop(d), "JVM_ArrayCopy: dst not an oop");
334 // Do copy
335 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
336 JVM_END
337
338
339 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
340 JavaValue r(T_OBJECT);
341 // public synchronized Object put(Object key, Object value);
342 HandleMark hm(THREAD);
343 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
344 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
345 JavaCalls::call_virtual(&r,
346 props,
347 SystemDictionary::Properties_klass(),
348 vmSymbols::put_name(),
349 vmSymbols::object_object_object_signature(),
350 key_str,
351 value_str,
352 THREAD);
353 }
354
355
356 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
357
358 /*
359 * Return all of the system properties in a Java String array with alternating
360 * names and values from the jvm SystemProperty.
361 * Which includes some internal and all commandline -D defined properties.
362 */
363 JVM_ENTRY(jobjectArray, JVM_GetProperties(JNIEnv *env))
364 JVMWrapper("JVM_GetProperties");
365 ResourceMark rm(THREAD);
366 HandleMark hm(THREAD);
367 int ndx = 0;
368 int fixedCount = 2;
369
370 SystemProperty* p = Arguments::system_properties();
371 int count = Arguments::PropertyList_count(p);
372
373 // Allocate result String array
374 InstanceKlass* ik = SystemDictionary::String_klass();
375 objArrayOop r = oopFactory::new_objArray(ik, (count + fixedCount) * 2, CHECK_NULL);
376 objArrayHandle result_h(THREAD, r);
377
378 while (p != NULL) {
379 const char * key = p->key();
380 if (strcmp(key, "sun.nio.MaxDirectMemorySize") != 0) {
381 const char * value = p->value();
382 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK_NULL);
383 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK_NULL);
384 result_h->obj_at_put(ndx * 2, key_str());
385 result_h->obj_at_put(ndx * 2 + 1, value_str());
386 ndx++;
387 }
388 p = p->next();
389 }
390
391 // Convert the -XX:MaxDirectMemorySize= command line flag
392 // to the sun.nio.MaxDirectMemorySize property.
393 // Do this after setting user properties to prevent people
394 // from setting the value with a -D option, as requested.
395 // Leave empty if not supplied
396 if (!FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
397 char as_chars[256];
398 jio_snprintf(as_chars, sizeof(as_chars), JULONG_FORMAT, MaxDirectMemorySize);
399 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.nio.MaxDirectMemorySize", CHECK_NULL);
400 Handle value_str = java_lang_String::create_from_platform_dependent_str(as_chars, CHECK_NULL);
401 result_h->obj_at_put(ndx * 2, key_str());
402 result_h->obj_at_put(ndx * 2 + 1, value_str());
403 ndx++;
404 }
405
406 // JVM monitoring and management support
407 // Add the sun.management.compiler property for the compiler's name
408 {
409 #undef CSIZE
410 #if defined(_LP64) || defined(_WIN64)
411 #define CSIZE "64-Bit "
412 #else
413 #define CSIZE
414 #endif // 64bit
415
416 #ifdef TIERED
417 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
418 #else
419 #if defined(COMPILER1)
420 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
421 #elif defined(COMPILER2)
422 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
423 #elif INCLUDE_JVMCI
424 #error "INCLUDE_JVMCI should imply TIERED"
425 #else
426 const char* compiler_name = "";
427 #endif // compilers
428 #endif // TIERED
429
430 if (*compiler_name != '\0' &&
431 (Arguments::mode() != Arguments::_int)) {
432 Handle key_str = java_lang_String::create_from_platform_dependent_str("sun.management.compiler", CHECK_NULL);
433 Handle value_str = java_lang_String::create_from_platform_dependent_str(compiler_name, CHECK_NULL);
434 result_h->obj_at_put(ndx * 2, key_str());
435 result_h->obj_at_put(ndx * 2 + 1, value_str());
436 ndx++;
437 }
438 }
439
440 return (jobjectArray) JNIHandles::make_local(env, result_h());
441 JVM_END
442
443
444 /*
445 * Return the temporary directory that the VM uses for the attach
446 * and perf data files.
447 *
448 * It is important that this directory is well-known and the
449 * same for all VM instances. It cannot be affected by configuration
450 * variables such as java.io.tmpdir.
451 */
452 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
453 JVMWrapper("JVM_GetTemporaryDirectory");
454 HandleMark hm(THREAD);
455 const char* temp_dir = os::get_temp_directory();
456 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
457 return (jstring) JNIHandles::make_local(env, h());
458 JVM_END
459
460
461 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
462
463 extern volatile jint vm_created;
464
465 JVM_ENTRY_NO_ENV(void, JVM_BeforeHalt())
466 JVMWrapper("JVM_BeforeHalt");
467 EventShutdown event;
468 if (event.should_commit()) {
469 event.set_reason("Shutdown requested from Java");
470 event.commit();
471 }
472 JVM_END
473
474
475 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
476 before_exit(thread);
477 vm_exit(code);
478 JVM_END
479
480
481 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
482 JVMWrapper("JVM_GC");
483 if (!DisableExplicitGC) {
484 Universe::heap()->collect(GCCause::_java_lang_system_gc);
485 }
486 JVM_END
487
488
489 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
490 JVMWrapper("JVM_MaxObjectInspectionAge");
491 return Universe::heap()->millis_since_last_gc();
492 JVM_END
493
494
495 static inline jlong convert_size_t_to_jlong(size_t val) {
496 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
497 NOT_LP64 (return (jlong)val;)
498 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
499 }
500
501 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
502 JVMWrapper("JVM_TotalMemory");
503 size_t n = Universe::heap()->capacity();
504 return convert_size_t_to_jlong(n);
505 JVM_END
506
507
508 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
509 JVMWrapper("JVM_FreeMemory");
510 CollectedHeap* ch = Universe::heap();
511 size_t n;
512 {
513 MutexLocker x(Heap_lock);
514 n = ch->capacity() - ch->used();
515 }
516 return convert_size_t_to_jlong(n);
517 JVM_END
518
519
520 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
521 JVMWrapper("JVM_MaxMemory");
522 size_t n = Universe::heap()->max_capacity();
523 return convert_size_t_to_jlong(n);
524 JVM_END
525
526
527 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
528 JVMWrapper("JVM_ActiveProcessorCount");
529 return os::active_processor_count();
530 JVM_END
531
532
533
534 // java.lang.Throwable //////////////////////////////////////////////////////
535
536
537 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
538 JVMWrapper("JVM_FillInStackTrace");
539 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
540 java_lang_Throwable::fill_in_stack_trace(exception);
541 JVM_END
542
543
544 // java.lang.StackTraceElement //////////////////////////////////////////////
545
546
547 JVM_ENTRY(void, JVM_InitStackTraceElementArray(JNIEnv *env, jobjectArray elements, jobject throwable))
548 JVMWrapper("JVM_InitStackTraceElementArray");
549 Handle exception(THREAD, JNIHandles::resolve(throwable));
550 objArrayOop st = objArrayOop(JNIHandles::resolve(elements));
551 objArrayHandle stack_trace(THREAD, st);
552 // Fill in the allocated stack trace
553 java_lang_Throwable::get_stack_trace_elements(exception, stack_trace, CHECK);
554 JVM_END
555
556
557 JVM_ENTRY(void, JVM_InitStackTraceElement(JNIEnv* env, jobject element, jobject stackFrameInfo))
558 JVMWrapper("JVM_InitStackTraceElement");
559 Handle stack_frame_info(THREAD, JNIHandles::resolve_non_null(stackFrameInfo));
560 Handle stack_trace_element(THREAD, JNIHandles::resolve_non_null(element));
561 java_lang_StackFrameInfo::to_stack_trace_element(stack_frame_info, stack_trace_element, THREAD);
562 JVM_END
563
564
565 // java.lang.StackWalker //////////////////////////////////////////////////////
566
567
568 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
569 jint skip_frames, jint frame_count, jint start_index,
570 jobjectArray frames))
571 JVMWrapper("JVM_CallStackWalk");
572 JavaThread* jt = (JavaThread*) THREAD;
573 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
574 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
575 }
576
577 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
578
579 // frames array is a Class<?>[] array when only getting caller reference,
580 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
581 // be null.
582 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
583 objArrayHandle frames_array_h(THREAD, fa);
584
585 int limit = start_index + frame_count;
586 if (frames_array_h->length() < limit) {
587 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
588 }
589
590 oop result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
591 start_index, frames_array_h, CHECK_NULL);
592 return JNIHandles::make_local(env, result);
593 JVM_END
594
595
596 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
597 jint frame_count, jint start_index,
598 jobjectArray frames))
599 JVMWrapper("JVM_MoreStackWalk");
600 JavaThread* jt = (JavaThread*) THREAD;
601
602 // frames array is a Class<?>[] array when only getting caller reference,
603 // and a StackFrameInfo[] array (or derivative) otherwise. It should never
604 // be null.
605 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
606 objArrayHandle frames_array_h(THREAD, fa);
607
608 int limit = start_index+frame_count;
609 if (frames_array_h->length() < limit) {
610 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
611 }
612
613 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
614 return StackWalk::fetchNextBatch(stackStream_h, mode, anchor, frame_count,
615 start_index, frames_array_h, THREAD);
616 JVM_END
617
618 // java.lang.Object ///////////////////////////////////////////////
619
620
621 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
622 JVMWrapper("JVM_IHashCode");
623 // as implemented in the classic virtual machine; return 0 if object is NULL
624 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
625 JVM_END
626
627
628 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
629 JVMWrapper("JVM_MonitorWait");
630 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
631 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
632 if (JvmtiExport::should_post_monitor_wait()) {
633 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
634
635 // The current thread already owns the monitor and it has not yet
636 // been added to the wait queue so the current thread cannot be
637 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
638 // event handler cannot accidentally consume an unpark() meant for
639 // the ParkEvent associated with this ObjectMonitor.
640 }
641 ObjectSynchronizer::wait(obj, ms, CHECK);
642 JVM_END
643
644
645 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
646 JVMWrapper("JVM_MonitorNotify");
647 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
648 ObjectSynchronizer::notify(obj, CHECK);
649 JVM_END
650
651
652 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
653 JVMWrapper("JVM_MonitorNotifyAll");
654 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
655 ObjectSynchronizer::notifyall(obj, CHECK);
656 JVM_END
657
658
659 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
660 JVMWrapper("JVM_Clone");
661 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
662 Klass* klass = obj->klass();
663 JvmtiVMObjectAllocEventCollector oam;
664
665 #ifdef ASSERT
666 // Just checking that the cloneable flag is set correct
667 if (obj->is_array()) {
668 guarantee(klass->is_cloneable(), "all arrays are cloneable");
669 } else {
670 guarantee(obj->is_instance(), "should be instanceOop");
671 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
672 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
673 }
674 #endif
675
676 // Check if class of obj supports the Cloneable interface.
677 // All arrays are considered to be cloneable (See JLS 20.1.5).
678 // All j.l.r.Reference classes are considered non-cloneable.
679 if (!klass->is_cloneable() ||
680 (klass->is_instance_klass() &&
681 InstanceKlass::cast(klass)->reference_type() != REF_NONE)) {
682 ResourceMark rm(THREAD);
683 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
684 }
685
686 // Make shallow object copy
687 const int size = obj->size();
688 oop new_obj_oop = NULL;
689 if (obj->is_array()) {
690 const int length = ((arrayOop)obj())->length();
691 new_obj_oop = Universe::heap()->array_allocate(klass, size, length,
692 /* do_zero */ true, CHECK_NULL);
693 } else {
694 new_obj_oop = Universe::heap()->obj_allocate(klass, size, CHECK_NULL);
695 }
696
697 HeapAccess<>::clone(obj(), new_obj_oop, size);
698
699 Handle new_obj(THREAD, new_obj_oop);
700 // Caution: this involves a java upcall, so the clone should be
701 // "gc-robust" by this stage.
702 if (klass->has_finalizer()) {
703 assert(obj->is_instance(), "should be instanceOop");
704 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
705 new_obj = Handle(THREAD, new_obj_oop);
706 }
707
708 return JNIHandles::make_local(env, new_obj());
709 JVM_END
710
711 // java.io.File ///////////////////////////////////////////////////////////////
712
713 JVM_LEAF(char*, JVM_NativePath(char* path))
714 JVMWrapper("JVM_NativePath");
715 return os::native_path(path);
716 JVM_END
717
718
719 // Misc. class handling ///////////////////////////////////////////////////////////
720
721
722 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env))
723 JVMWrapper("JVM_GetCallerClass");
724
725 // Getting the class of the caller frame.
726 //
727 // The call stack at this point looks something like this:
728 //
729 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
730 // [1] [ @CallerSensitive API.method ]
731 // [.] [ (skipped intermediate frames) ]
732 // [n] [ caller ]
733 vframeStream vfst(thread);
734 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
735 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
736 Method* m = vfst.method();
737 assert(m != NULL, "sanity");
738 switch (n) {
739 case 0:
740 // This must only be called from Reflection.getCallerClass
741 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
742 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
743 }
744 // fall-through
745 case 1:
746 // Frame 0 and 1 must be caller sensitive.
747 if (!m->caller_sensitive()) {
748 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
749 }
750 break;
751 default:
752 if (!m->is_ignored_by_security_stack_walk()) {
753 // We have reached the desired frame; return the holder class.
754 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
755 }
756 break;
757 }
758 }
759 return NULL;
760 JVM_END
761
762
763 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
764 JVMWrapper("JVM_FindPrimitiveClass");
765 oop mirror = NULL;
766 BasicType t = name2type(utf);
767 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
768 mirror = Universe::java_mirror(t);
769 }
770 if (mirror == NULL) {
771 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
772 } else {
773 return (jclass) JNIHandles::make_local(env, mirror);
774 }
775 JVM_END
776
777
778 // Returns a class loaded by the bootstrap class loader; or null
779 // if not found. ClassNotFoundException is not thrown.
780 // FindClassFromBootLoader is exported to the launcher for windows.
781 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
782 const char* name))
783 JVMWrapper("JVM_FindClassFromBootLoader");
784
785 // Java libraries should ensure that name is never null...
786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
787 // It's impossible to create this class; the name cannot fit
788 // into the constant pool.
789 return NULL;
790 }
791
792 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
793 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
794 if (k == NULL) {
795 return NULL;
796 }
797
798 if (log_is_enabled(Debug, class, resolve)) {
799 trace_class_resolution(k);
800 }
801 return (jclass) JNIHandles::make_local(env, k->java_mirror());
802 JVM_END
803
804 // Find a class with this name in this loader, using the caller's protection domain.
805 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
806 jboolean init, jobject loader,
807 jclass caller))
808 JVMWrapper("JVM_FindClassFromCaller throws ClassNotFoundException");
809 // Java libraries should ensure that name is never null...
810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
811 // It's impossible to create this class; the name cannot fit
812 // into the constant pool.
813 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
814 }
815
816 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
817
818 oop loader_oop = JNIHandles::resolve(loader);
819 oop from_class = JNIHandles::resolve(caller);
820 oop protection_domain = NULL;
821 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
822 // NPE. Put it in another way, the bootstrap class loader has all permission and
823 // thus no checkPackageAccess equivalence in the VM class loader.
824 // The caller is also passed as NULL by the java code if there is no security
825 // manager to avoid the performance cost of getting the calling class.
826 if (from_class != NULL && loader_oop != NULL) {
827 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
828 }
829
830 Handle h_loader(THREAD, loader_oop);
831 Handle h_prot(THREAD, protection_domain);
832 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
833 h_prot, false, THREAD);
834
835 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
836 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
837 }
838 return result;
839 JVM_END
840
841 // Currently only called from the old verifier.
842 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
843 jboolean init, jclass from))
844 JVMWrapper("JVM_FindClassFromClass");
845 if (name == NULL) {
846 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), "No class name given");
847 }
848 if ((int)strlen(name) > Symbol::max_length()) {
849 // It's impossible to create this class; the name cannot fit
850 // into the constant pool.
851 Exceptions::fthrow(THREAD_AND_LOCATION,
852 vmSymbols::java_lang_NoClassDefFoundError(),
853 "Class name exceeds maximum length of %d: %s",
854 Symbol::max_length(),
855 name);
856 return 0;
857 }
858 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
859 oop from_class_oop = JNIHandles::resolve(from);
860 Klass* from_class = (from_class_oop == NULL)
861 ? (Klass*)NULL
862 : java_lang_Class::as_Klass(from_class_oop);
863 oop class_loader = NULL;
864 oop protection_domain = NULL;
865 if (from_class != NULL) {
866 class_loader = from_class->class_loader();
867 protection_domain = from_class->protection_domain();
868 }
869 Handle h_loader(THREAD, class_loader);
870 Handle h_prot (THREAD, protection_domain);
871 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
872 h_prot, true, thread);
873 if (result != NULL) {
874 oop mirror = JNIHandles::resolve_non_null(result);
875 Klass* to_class = java_lang_Class::as_Klass(mirror);
876 ClassLoaderData::class_loader_data(h_loader())->record_dependency(to_class);
877 }
878
879 if (log_is_enabled(Debug, class, resolve) && result != NULL) {
880 // this function is generally only used for class loading during verification.
881 ResourceMark rm;
882 oop from_mirror = JNIHandles::resolve_non_null(from);
883 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
884 const char * from_name = from_class->external_name();
885
886 oop mirror = JNIHandles::resolve_non_null(result);
887 Klass* to_class = java_lang_Class::as_Klass(mirror);
888 const char * to = to_class->external_name();
889 log_debug(class, resolve)("%s %s (verification)", from_name, to);
890 }
891
892 return result;
893 JVM_END
894
895 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
896 if (loader.is_null()) {
897 return;
898 }
899
900 // check whether the current caller thread holds the lock or not.
901 // If not, increment the corresponding counter
902 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
903 ObjectSynchronizer::owner_self) {
904 counter->inc();
905 }
906 }
907
908 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
909 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
910 jobject loader, const jbyte *buf,
911 jsize len, jobject pd, const char *source,
912 TRAPS) {
913 if (source == NULL) source = "__JVM_DefineClass__";
914
915 assert(THREAD->is_Java_thread(), "must be a JavaThread");
916 JavaThread* jt = (JavaThread*) THREAD;
917
918 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
919 ClassLoader::perf_define_appclass_selftime(),
920 ClassLoader::perf_define_appclasses(),
921 jt->get_thread_stat()->perf_recursion_counts_addr(),
922 jt->get_thread_stat()->perf_timers_addr(),
923 PerfClassTraceTime::DEFINE_CLASS);
924
925 if (UsePerfData) {
926 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
927 }
928
929 // Since exceptions can be thrown, class initialization can take place
930 // if name is NULL no check for class name in .class stream has to be made.
931 TempNewSymbol class_name = NULL;
932 if (name != NULL) {
933 const int str_len = (int)strlen(name);
934 if (str_len > Symbol::max_length()) {
935 // It's impossible to create this class; the name cannot fit
936 // into the constant pool.
937 Exceptions::fthrow(THREAD_AND_LOCATION,
938 vmSymbols::java_lang_NoClassDefFoundError(),
939 "Class name exceeds maximum length of %d: %s",
940 Symbol::max_length(),
941 name);
942 return 0;
943 }
944 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
945 }
946
947 ResourceMark rm(THREAD);
948 ClassFileStream st((u1*)buf, len, source, ClassFileStream::verify);
949 Handle class_loader (THREAD, JNIHandles::resolve(loader));
950 if (UsePerfData) {
951 is_lock_held_by_thread(class_loader,
952 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
953 THREAD);
954 }
955 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
956 Klass* k = SystemDictionary::resolve_from_stream(class_name,
957 class_loader,
958 protection_domain,
959 &st,
960 CHECK_NULL);
961
962 if (log_is_enabled(Debug, class, resolve) && k != NULL) {
963 trace_class_resolution(k);
964 }
965
966 return (jclass) JNIHandles::make_local(env, k->java_mirror());
967 }
968
969
970 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
971 JVMWrapper("JVM_DefineClass");
972
973 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
974 JVM_END
975
976
977 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
978 JVMWrapper("JVM_DefineClassWithSource");
979
980 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
981 JVM_END
982
983 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
984 JVMWrapper("JVM_FindLoadedClass");
985 ResourceMark rm(THREAD);
986
987 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
988 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
989
990 const char* str = java_lang_String::as_utf8_string(string());
991 // Sanity check, don't expect null
992 if (str == NULL) return NULL;
993
994 const int str_len = (int)strlen(str);
995 if (str_len > Symbol::max_length()) {
996 // It's impossible to create this class; the name cannot fit
997 // into the constant pool.
998 return NULL;
999 }
1000 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1001
1002 // Security Note:
1003 // The Java level wrapper will perform the necessary security check allowing
1004 // us to pass the NULL as the initiating class loader.
1005 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1006 if (UsePerfData) {
1007 is_lock_held_by_thread(h_loader,
1008 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1009 THREAD);
1010 }
1011
1012 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1013 h_loader,
1014 Handle(),
1015 CHECK_NULL);
1016 #if INCLUDE_CDS
1017 if (k == NULL) {
1018 // If the class is not already loaded, try to see if it's in the shared
1019 // archive for the current classloader (h_loader).
1020 k = SystemDictionaryShared::find_or_load_shared_class(klass_name, h_loader, CHECK_NULL);
1021 }
1022 #endif
1023 return (k == NULL) ? NULL :
1024 (jclass) JNIHandles::make_local(env, k->java_mirror());
1025 JVM_END
1026
1027 // Module support //////////////////////////////////////////////////////////////////////////////
1028
1029 JVM_ENTRY(void, JVM_DefineModule(JNIEnv *env, jobject module, jboolean is_open, jstring version,
1030 jstring location, const char* const* packages, jsize num_packages))
1031 JVMWrapper("JVM_DefineModule");
1032 Modules::define_module(module, is_open, version, location, packages, num_packages, CHECK);
1033 JVM_END
1034
1035 JVM_ENTRY(void, JVM_SetBootLoaderUnnamedModule(JNIEnv *env, jobject module))
1036 JVMWrapper("JVM_SetBootLoaderUnnamedModule");
1037 Modules::set_bootloader_unnamed_module(module, CHECK);
1038 JVM_END
1039
1040 JVM_ENTRY(void, JVM_AddModuleExports(JNIEnv *env, jobject from_module, const char* package, jobject to_module))
1041 JVMWrapper("JVM_AddModuleExports");
1042 Modules::add_module_exports_qualified(from_module, package, to_module, CHECK);
1043 JVM_END
1044
1045 JVM_ENTRY(void, JVM_AddModuleExportsToAllUnnamed(JNIEnv *env, jobject from_module, const char* package))
1046 JVMWrapper("JVM_AddModuleExportsToAllUnnamed");
1047 Modules::add_module_exports_to_all_unnamed(from_module, package, CHECK);
1048 JVM_END
1049
1050 JVM_ENTRY(void, JVM_AddModuleExportsToAll(JNIEnv *env, jobject from_module, const char* package))
1051 JVMWrapper("JVM_AddModuleExportsToAll");
1052 Modules::add_module_exports(from_module, package, NULL, CHECK);
1053 JVM_END
1054
1055 JVM_ENTRY (void, JVM_AddReadsModule(JNIEnv *env, jobject from_module, jobject source_module))
1056 JVMWrapper("JVM_AddReadsModule");
1057 Modules::add_reads_module(from_module, source_module, CHECK);
1058 JVM_END
1059
1060 // Reflection support //////////////////////////////////////////////////////////////////////////////
1061
1062 JVM_ENTRY(jstring, JVM_InitClassName(JNIEnv *env, jclass cls))
1063 assert (cls != NULL, "illegal class");
1064 JVMWrapper("JVM_InitClassName");
1065 JvmtiVMObjectAllocEventCollector oam;
1066 ResourceMark rm(THREAD);
1067 HandleMark hm(THREAD);
1068 Handle java_class(THREAD, JNIHandles::resolve(cls));
1069 oop result = java_lang_Class::name(java_class, CHECK_NULL);
1070 return (jstring) JNIHandles::make_local(env, result);
1071 JVM_END
1072
1073
1074 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1075 JVMWrapper("JVM_GetClassInterfaces");
1076 JvmtiVMObjectAllocEventCollector oam;
1077 oop mirror = JNIHandles::resolve_non_null(cls);
1078
1079 // Special handling for primitive objects
1080 if (java_lang_Class::is_primitive(mirror)) {
1081 // Primitive objects does not have any interfaces
1082 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1083 return (jobjectArray) JNIHandles::make_local(env, r);
1084 }
1085
1086 Klass* klass = java_lang_Class::as_Klass(mirror);
1087 // Figure size of result array
1088 int size;
1089 if (klass->is_instance_klass()) {
1090 size = InstanceKlass::cast(klass)->local_interfaces()->length();
1091 } else {
1092 assert(klass->is_objArray_klass() || klass->is_typeArray_klass(), "Illegal mirror klass");
1093 size = 2;
1094 }
1095
1096 // Allocate result array
1097 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1098 objArrayHandle result (THREAD, r);
1099 // Fill in result
1100 if (klass->is_instance_klass()) {
1101 // Regular instance klass, fill in all local interfaces
1102 for (int index = 0; index < size; index++) {
1103 Klass* k = InstanceKlass::cast(klass)->local_interfaces()->at(index);
1104 result->obj_at_put(index, k->java_mirror());
1105 }
1106 } else {
1107 // All arrays implement java.lang.Cloneable and java.io.Serializable
1108 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1109 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1110 }
1111 return (jobjectArray) JNIHandles::make_local(env, result());
1112 JVM_END
1113
1114
1115 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1116 JVMWrapper("JVM_IsInterface");
1117 oop mirror = JNIHandles::resolve_non_null(cls);
1118 if (java_lang_Class::is_primitive(mirror)) {
1119 return JNI_FALSE;
1120 }
1121 Klass* k = java_lang_Class::as_Klass(mirror);
1122 jboolean result = k->is_interface();
1123 assert(!result || k->is_instance_klass(),
1124 "all interfaces are instance types");
1125 // The compiler intrinsic for isInterface tests the
1126 // Klass::_access_flags bits in the same way.
1127 return result;
1128 JVM_END
1129
1130
1131 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1132 JVMWrapper("JVM_GetClassSigners");
1133 JvmtiVMObjectAllocEventCollector oam;
1134 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1135 // There are no signers for primitive types
1136 return NULL;
1137 }
1138
1139 objArrayHandle signers(THREAD, java_lang_Class::signers(JNIHandles::resolve_non_null(cls)));
1140
1141 // If there are no signers set in the class, or if the class
1142 // is an array, return NULL.
1143 if (signers == NULL) return NULL;
1144
1145 // copy of the signers array
1146 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1147 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1148 for (int index = 0; index < signers->length(); index++) {
1149 signers_copy->obj_at_put(index, signers->obj_at(index));
1150 }
1151
1152 // return the copy
1153 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1154 JVM_END
1155
1156
1157 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1158 JVMWrapper("JVM_SetClassSigners");
1159 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1160 // This call is ignored for primitive types and arrays.
1161 // Signers are only set once, ClassLoader.java, and thus shouldn't
1162 // be called with an array. Only the bootstrap loader creates arrays.
1163 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1164 if (k->is_instance_klass()) {
1165 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1166 }
1167 }
1168 JVM_END
1169
1170
1171 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1172 JVMWrapper("JVM_GetProtectionDomain");
1173 if (JNIHandles::resolve(cls) == NULL) {
1174 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1175 }
1176
1177 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1178 // Primitive types does not have a protection domain.
1179 return NULL;
1180 }
1181
1182 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1183 return (jobject) JNIHandles::make_local(env, pd);
1184 JVM_END
1185
1186
1187 // Returns the inherited_access_control_context field of the running thread.
1188 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1189 JVMWrapper("JVM_GetInheritedAccessControlContext");
1190 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1191 return JNIHandles::make_local(env, result);
1192 JVM_END
1193
1194 class RegisterArrayForGC {
1195 private:
1196 JavaThread *_thread;
1197 public:
1198 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1199 _thread = thread;
1200 _thread->register_array_for_gc(array);
1201 }
1202
1203 ~RegisterArrayForGC() {
1204 _thread->register_array_for_gc(NULL);
1205 }
1206 };
1207
1208
1209 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1210 JVMWrapper("JVM_GetStackAccessControlContext");
1211 if (!UsePrivilegedStack) return NULL;
1212
1213 ResourceMark rm(THREAD);
1214 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1215 JvmtiVMObjectAllocEventCollector oam;
1216
1217 // count the protection domains on the execution stack. We collapse
1218 // duplicate consecutive protection domains into a single one, as
1219 // well as stopping when we hit a privileged frame.
1220
1221 oop previous_protection_domain = NULL;
1222 Handle privileged_context(thread, NULL);
1223 bool is_privileged = false;
1224 oop protection_domain = NULL;
1225
1226 // Iterate through Java frames
1227 vframeStream vfst(thread);
1228 for(; !vfst.at_end(); vfst.next()) {
1229 // get method of frame
1230 Method* method = vfst.method();
1231
1232 // stop at the first privileged frame
1233 if (method->method_holder() == SystemDictionary::AccessController_klass() &&
1234 method->name() == vmSymbols::executePrivileged_name())
1235 {
1236 // this frame is privileged
1237 is_privileged = true;
1238
1239 javaVFrame *priv = vfst.asJavaVFrame(); // executePrivileged
1240
1241 StackValueCollection* locals = priv->locals();
1242 StackValue* ctx_sv = locals->at(1); // AccessControlContext context
1243 StackValue* clr_sv = locals->at(2); // Class<?> caller
1244 assert(!ctx_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1245 assert(!clr_sv->obj_is_scalar_replaced(), "found scalar-replaced object");
1246 privileged_context = ctx_sv->get_obj();
1247 Handle caller = clr_sv->get_obj();
1248
1249 Klass *caller_klass = java_lang_Class::as_Klass(caller());
1250 protection_domain = caller_klass->protection_domain();
1251 } else {
1252 protection_domain = method->method_holder()->protection_domain();
1253 }
1254
1255 if ((!oopDesc::equals(previous_protection_domain, protection_domain)) && (protection_domain != NULL)) {
1256 local_array->push(protection_domain);
1257 previous_protection_domain = protection_domain;
1258 }
1259
1260 if (is_privileged) break;
1261 }
1262
1263
1264 // either all the domains on the stack were system domains, or
1265 // we had a privileged system domain
1266 if (local_array->is_empty()) {
1267 if (is_privileged && privileged_context.is_null()) return NULL;
1268
1269 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1270 return JNIHandles::make_local(env, result);
1271 }
1272
1273 // the resource area must be registered in case of a gc
1274 RegisterArrayForGC ragc(thread, local_array);
1275 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1276 local_array->length(), CHECK_NULL);
1277 objArrayHandle h_context(thread, context);
1278 for (int index = 0; index < local_array->length(); index++) {
1279 h_context->obj_at_put(index, local_array->at(index));
1280 }
1281
1282 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1283
1284 return JNIHandles::make_local(env, result);
1285 JVM_END
1286
1287
1288 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1289 JVMWrapper("JVM_IsArrayClass");
1290 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1291 return (k != NULL) && k->is_array_klass() ? true : false;
1292 JVM_END
1293
1294
1295 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1296 JVMWrapper("JVM_IsPrimitiveClass");
1297 oop mirror = JNIHandles::resolve_non_null(cls);
1298 return (jboolean) java_lang_Class::is_primitive(mirror);
1299 JVM_END
1300
1301
1302 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1303 JVMWrapper("JVM_GetClassModifiers");
1304 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1305 // Primitive type
1306 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1307 }
1308
1309 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1310 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1311 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1312 return k->modifier_flags();
1313 JVM_END
1314
1315
1316 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1317
1318 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1319 JvmtiVMObjectAllocEventCollector oam;
1320 // ofClass is a reference to a java_lang_Class object. The mirror object
1321 // of an InstanceKlass
1322
1323 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1324 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1325 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1326 return (jobjectArray)JNIHandles::make_local(env, result);
1327 }
1328
1329 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1330 InnerClassesIterator iter(k);
1331
1332 if (iter.length() == 0) {
1333 // Neither an inner nor outer class
1334 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1335 return (jobjectArray)JNIHandles::make_local(env, result);
1336 }
1337
1338 // find inner class info
1339 constantPoolHandle cp(thread, k->constants());
1340 int length = iter.length();
1341
1342 // Allocate temp. result array
1343 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1344 objArrayHandle result (THREAD, r);
1345 int members = 0;
1346
1347 for (; !iter.done(); iter.next()) {
1348 int ioff = iter.inner_class_info_index();
1349 int ooff = iter.outer_class_info_index();
1350
1351 if (ioff != 0 && ooff != 0) {
1352 // Check to see if the name matches the class we're looking for
1353 // before attempting to find the class.
1354 if (cp->klass_name_at_matches(k, ooff)) {
1355 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1356 if (outer_klass == k) {
1357 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1358 InstanceKlass* inner_klass = InstanceKlass::cast(ik);
1359
1360 // Throws an exception if outer klass has not declared k as
1361 // an inner klass
1362 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1363
1364 result->obj_at_put(members, inner_klass->java_mirror());
1365 members++;
1366 }
1367 }
1368 }
1369 }
1370
1371 if (members != length) {
1372 // Return array of right length
1373 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1374 for(int i = 0; i < members; i++) {
1375 res->obj_at_put(i, result->obj_at(i));
1376 }
1377 return (jobjectArray)JNIHandles::make_local(env, res);
1378 }
1379
1380 return (jobjectArray)JNIHandles::make_local(env, result());
1381 JVM_END
1382
1383
1384 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1385 {
1386 // ofClass is a reference to a java_lang_Class object.
1387 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1388 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_instance_klass()) {
1389 return NULL;
1390 }
1391
1392 bool inner_is_member = false;
1393 Klass* outer_klass
1394 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1395 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1396 if (outer_klass == NULL) return NULL; // already a top-level class
1397 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1398 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1399 }
1400 JVM_END
1401
1402 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1403 {
1404 oop mirror = JNIHandles::resolve_non_null(cls);
1405 if (java_lang_Class::is_primitive(mirror) ||
1406 !java_lang_Class::as_Klass(mirror)->is_instance_klass()) {
1407 return NULL;
1408 }
1409 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(mirror));
1410 int ooff = 0, noff = 0;
1411 if (k->find_inner_classes_attr(&ooff, &noff, THREAD)) {
1412 if (noff != 0) {
1413 constantPoolHandle i_cp(thread, k->constants());
1414 Symbol* name = i_cp->symbol_at(noff);
1415 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1416 return (jstring) JNIHandles::make_local(env, str());
1417 }
1418 }
1419 return NULL;
1420 }
1421 JVM_END
1422
1423 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1424 assert (cls != NULL, "illegal class");
1425 JVMWrapper("JVM_GetClassSignature");
1426 JvmtiVMObjectAllocEventCollector oam;
1427 ResourceMark rm(THREAD);
1428 // Return null for arrays and primatives
1429 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1431 if (k->is_instance_klass()) {
1432 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1433 if (sym == NULL) return NULL;
1434 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1435 return (jstring) JNIHandles::make_local(env, str());
1436 }
1437 }
1438 return NULL;
1439 JVM_END
1440
1441
1442 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1443 assert (cls != NULL, "illegal class");
1444 JVMWrapper("JVM_GetClassAnnotations");
1445
1446 // Return null for arrays and primitives
1447 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1448 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1449 if (k->is_instance_klass()) {
1450 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1451 return (jbyteArray) JNIHandles::make_local(env, a);
1452 }
1453 }
1454 return NULL;
1455 JVM_END
1456
1457
1458 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1459 // some of this code was adapted from from jni_FromReflectedField
1460
1461 oop reflected = JNIHandles::resolve_non_null(field);
1462 oop mirror = java_lang_reflect_Field::clazz(reflected);
1463 Klass* k = java_lang_Class::as_Klass(mirror);
1464 int slot = java_lang_reflect_Field::slot(reflected);
1465 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1466
1467 InstanceKlass* ik = InstanceKlass::cast(k);
1468 intptr_t offset = ik->field_offset(slot);
1469
1470 if (modifiers & JVM_ACC_STATIC) {
1471 // for static fields we only look in the current class
1472 if (!ik->find_local_field_from_offset(offset, true, &fd)) {
1473 assert(false, "cannot find static field");
1474 return false;
1475 }
1476 } else {
1477 // for instance fields we start with the current class and work
1478 // our way up through the superclass chain
1479 if (!ik->find_field_from_offset(offset, false, &fd)) {
1480 assert(false, "cannot find instance field");
1481 return false;
1482 }
1483 }
1484 return true;
1485 }
1486
1487 static Method* jvm_get_method_common(jobject method) {
1488 // some of this code was adapted from from jni_FromReflectedMethod
1489
1490 oop reflected = JNIHandles::resolve_non_null(method);
1491 oop mirror = NULL;
1492 int slot = 0;
1493
1494 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1495 mirror = java_lang_reflect_Constructor::clazz(reflected);
1496 slot = java_lang_reflect_Constructor::slot(reflected);
1497 } else {
1498 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1499 "wrong type");
1500 mirror = java_lang_reflect_Method::clazz(reflected);
1501 slot = java_lang_reflect_Method::slot(reflected);
1502 }
1503 Klass* k = java_lang_Class::as_Klass(mirror);
1504
1505 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1506 assert(m != NULL, "cannot find method");
1507 return m; // caller has to deal with NULL in product mode
1508 }
1509
1510 /* Type use annotations support (JDK 1.8) */
1511
1512 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1513 assert (cls != NULL, "illegal class");
1514 JVMWrapper("JVM_GetClassTypeAnnotations");
1515 ResourceMark rm(THREAD);
1516 // Return null for arrays and primitives
1517 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1519 if (k->is_instance_klass()) {
1520 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1521 if (type_annotations != NULL) {
1522 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1523 return (jbyteArray) JNIHandles::make_local(env, a);
1524 }
1525 }
1526 }
1527 return NULL;
1528 JVM_END
1529
1530 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1531 assert (method != NULL, "illegal method");
1532 JVMWrapper("JVM_GetMethodTypeAnnotations");
1533
1534 // method is a handle to a java.lang.reflect.Method object
1535 Method* m = jvm_get_method_common(method);
1536 if (m == NULL) {
1537 return NULL;
1538 }
1539
1540 AnnotationArray* type_annotations = m->type_annotations();
1541 if (type_annotations != NULL) {
1542 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1543 return (jbyteArray) JNIHandles::make_local(env, a);
1544 }
1545
1546 return NULL;
1547 JVM_END
1548
1549 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1550 assert (field != NULL, "illegal field");
1551 JVMWrapper("JVM_GetFieldTypeAnnotations");
1552
1553 fieldDescriptor fd;
1554 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1555 if (!gotFd) {
1556 return NULL;
1557 }
1558
1559 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1560 JVM_END
1561
1562 static void bounds_check(const constantPoolHandle& cp, jint index, TRAPS) {
1563 if (!cp->is_within_bounds(index)) {
1564 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1565 }
1566 }
1567
1568 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1569 {
1570 JVMWrapper("JVM_GetMethodParameters");
1571 // method is a handle to a java.lang.reflect.Method object
1572 Method* method_ptr = jvm_get_method_common(method);
1573 methodHandle mh (THREAD, method_ptr);
1574 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1575 const int num_params = mh->method_parameters_length();
1576
1577 if (num_params < 0) {
1578 // A -1 return value from method_parameters_length means there is no
1579 // parameter data. Return null to indicate this to the reflection
1580 // API.
1581 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1582 return (jobjectArray)NULL;
1583 } else {
1584 // Otherwise, we return something up to reflection, even if it is
1585 // a zero-length array. Why? Because in some cases this can
1586 // trigger a MalformedParametersException.
1587
1588 // make sure all the symbols are properly formatted
1589 for (int i = 0; i < num_params; i++) {
1590 MethodParametersElement* params = mh->method_parameters_start();
1591 int index = params[i].name_cp_index;
1592 bounds_check(mh->constants(), index, CHECK_NULL);
1593
1594 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1595 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1596 "Wrong type at constant pool index");
1597 }
1598
1599 }
1600
1601 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1602 objArrayHandle result (THREAD, result_oop);
1603
1604 for (int i = 0; i < num_params; i++) {
1605 MethodParametersElement* params = mh->method_parameters_start();
1606 // For a 0 index, give a NULL symbol
1607 Symbol* sym = 0 != params[i].name_cp_index ?
1608 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1609 int flags = params[i].flags;
1610 oop param = Reflection::new_parameter(reflected_method, i, sym,
1611 flags, CHECK_NULL);
1612 result->obj_at_put(i, param);
1613 }
1614 return (jobjectArray)JNIHandles::make_local(env, result());
1615 }
1616 }
1617 JVM_END
1618
1619 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1620
1621 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1622 {
1623 JVMWrapper("JVM_GetClassDeclaredFields");
1624 JvmtiVMObjectAllocEventCollector oam;
1625
1626 // Exclude primitive types and array types
1627 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1628 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1629 // Return empty array
1630 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1631 return (jobjectArray) JNIHandles::make_local(env, res);
1632 }
1633
1634 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1635 constantPoolHandle cp(THREAD, k->constants());
1636
1637 // Ensure class is linked
1638 k->link_class(CHECK_NULL);
1639
1640 // Allocate result
1641 int num_fields;
1642
1643 if (publicOnly) {
1644 num_fields = 0;
1645 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1646 if (fs.access_flags().is_public()) ++num_fields;
1647 }
1648 } else {
1649 num_fields = k->java_fields_count();
1650 }
1651
1652 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1653 objArrayHandle result (THREAD, r);
1654
1655 int out_idx = 0;
1656 fieldDescriptor fd;
1657 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1658 if (!publicOnly || fs.access_flags().is_public()) {
1659 fd.reinitialize(k, fs.index());
1660 oop field = Reflection::new_field(&fd, CHECK_NULL);
1661 result->obj_at_put(out_idx, field);
1662 ++out_idx;
1663 }
1664 }
1665 assert(out_idx == num_fields, "just checking");
1666 return (jobjectArray) JNIHandles::make_local(env, result());
1667 }
1668 JVM_END
1669
1670 static bool select_method(const methodHandle& method, bool want_constructor) {
1671 if (want_constructor) {
1672 return (method->is_initializer() && !method->is_static());
1673 } else {
1674 return (!method->is_initializer() && !method->is_overpass());
1675 }
1676 }
1677
1678 static jobjectArray get_class_declared_methods_helper(
1679 JNIEnv *env,
1680 jclass ofClass, jboolean publicOnly,
1681 bool want_constructor,
1682 Klass* klass, TRAPS) {
1683
1684 JvmtiVMObjectAllocEventCollector oam;
1685
1686 // Exclude primitive types and array types
1687 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1688 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->is_array_klass()) {
1689 // Return empty array
1690 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1691 return (jobjectArray) JNIHandles::make_local(env, res);
1692 }
1693
1694 InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1695
1696 // Ensure class is linked
1697 k->link_class(CHECK_NULL);
1698
1699 Array<Method*>* methods = k->methods();
1700 int methods_length = methods->length();
1701
1702 // Save original method_idnum in case of redefinition, which can change
1703 // the idnum of obsolete methods. The new method will have the same idnum
1704 // but if we refresh the methods array, the counts will be wrong.
1705 ResourceMark rm(THREAD);
1706 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1707 int num_methods = 0;
1708
1709 for (int i = 0; i < methods_length; i++) {
1710 methodHandle method(THREAD, methods->at(i));
1711 if (select_method(method, want_constructor)) {
1712 if (!publicOnly || method->is_public()) {
1713 idnums->push(method->method_idnum());
1714 ++num_methods;
1715 }
1716 }
1717 }
1718
1719 // Allocate result
1720 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1721 objArrayHandle result (THREAD, r);
1722
1723 // Now just put the methods that we selected above, but go by their idnum
1724 // in case of redefinition. The methods can be redefined at any safepoint,
1725 // so above when allocating the oop array and below when creating reflect
1726 // objects.
1727 for (int i = 0; i < num_methods; i++) {
1728 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1729 if (method.is_null()) {
1730 // Method may have been deleted and seems this API can handle null
1731 // Otherwise should probably put a method that throws NSME
1732 result->obj_at_put(i, NULL);
1733 } else {
1734 oop m;
1735 if (want_constructor) {
1736 m = Reflection::new_constructor(method, CHECK_NULL);
1737 } else {
1738 m = Reflection::new_method(method, false, CHECK_NULL);
1739 }
1740 result->obj_at_put(i, m);
1741 }
1742 }
1743
1744 return (jobjectArray) JNIHandles::make_local(env, result());
1745 }
1746
1747 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1748 {
1749 JVMWrapper("JVM_GetClassDeclaredMethods");
1750 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1751 /*want_constructor*/ false,
1752 SystemDictionary::reflect_Method_klass(), THREAD);
1753 }
1754 JVM_END
1755
1756 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1757 {
1758 JVMWrapper("JVM_GetClassDeclaredConstructors");
1759 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1760 /*want_constructor*/ true,
1761 SystemDictionary::reflect_Constructor_klass(), THREAD);
1762 }
1763 JVM_END
1764
1765 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1766 {
1767 JVMWrapper("JVM_GetClassAccessFlags");
1768 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1769 // Primitive type
1770 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1771 }
1772
1773 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1774 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1775 }
1776 JVM_END
1777
1778 JVM_ENTRY(jboolean, JVM_AreNestMates(JNIEnv *env, jclass current, jclass member))
1779 {
1780 JVMWrapper("JVM_AreNestMates");
1781 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1782 assert(c->is_instance_klass(), "must be");
1783 InstanceKlass* ck = InstanceKlass::cast(c);
1784 Klass* m = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(member));
1785 assert(m->is_instance_klass(), "must be");
1786 InstanceKlass* mk = InstanceKlass::cast(m);
1787 return ck->has_nestmate_access_to(mk, THREAD);
1788 }
1789 JVM_END
1790
1791 JVM_ENTRY(jclass, JVM_GetNestHost(JNIEnv* env, jclass current))
1792 {
1793 // current is not a primitive or array class
1794 JVMWrapper("JVM_GetNestHost");
1795 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1796 assert(c->is_instance_klass(), "must be");
1797 InstanceKlass* ck = InstanceKlass::cast(c);
1798 // Don't post exceptions if validation fails
1799 InstanceKlass* host = ck->nest_host(NULL, THREAD);
1800 return (jclass) (host == NULL ? NULL :
1801 JNIHandles::make_local(THREAD, host->java_mirror()));
1802 }
1803 JVM_END
1804
1805 JVM_ENTRY(jobjectArray, JVM_GetNestMembers(JNIEnv* env, jclass current))
1806 {
1807 // current is not a primitive or array class
1808 JVMWrapper("JVM_GetNestMembers");
1809 Klass* c = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(current));
1810 assert(c->is_instance_klass(), "must be");
1811 InstanceKlass* ck = InstanceKlass::cast(c);
1812 // Get the nest host for this nest - throw ICCE if validation fails
1813 Symbol* icce = vmSymbols::java_lang_IncompatibleClassChangeError();
1814 InstanceKlass* host = ck->nest_host(icce, CHECK_NULL);
1815
1816 {
1817 JvmtiVMObjectAllocEventCollector oam;
1818 Array<u2>* members = host->nest_members();
1819 int length = members == NULL ? 0 : members->length();
1820 // nest host is first in the array so make it one bigger
1821 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(),
1822 length + 1, CHECK_NULL);
1823 objArrayHandle result (THREAD, r);
1824 result->obj_at_put(0, host->java_mirror());
1825 if (length != 0) {
1826 int i;
1827 for (i = 0; i < length; i++) {
1828 int cp_index = members->at(i);
1829 Klass* k = host->constants()->klass_at(cp_index, CHECK_NULL);
1830 if (k->is_instance_klass()) {
1831 InstanceKlass* nest_host_k =
1832 InstanceKlass::cast(k)->nest_host(icce, CHECK_NULL);
1833 if (nest_host_k == host) {
1834 result->obj_at_put(i+1, k->java_mirror());
1835 }
1836 else {
1837 // k's nest host is legal but it isn't our host so
1838 // throw ICCE
1839 ResourceMark rm(THREAD);
1840 Exceptions::fthrow(THREAD_AND_LOCATION,
1841 icce,
1842 "Nest member %s in %s declares a different nest host of %s",
1843 k->external_name(),
1844 host->external_name(),
1845 nest_host_k->external_name()
1846 );
1847 return NULL;
1848 }
1849 }
1850 else {
1851 // we have a bad nest member entry - throw ICCE
1852 ResourceMark rm(THREAD);
1853 Exceptions::fthrow(THREAD_AND_LOCATION,
1854 icce,
1855 "Class %s can not be a nest member of %s",
1856 k->external_name(),
1857 host->external_name()
1858 );
1859 return NULL;
1860 }
1861 }
1862 }
1863 else {
1864 assert(host == ck, "must be singleton nest");
1865 }
1866 return (jobjectArray)JNIHandles::make_local(THREAD, result());
1867 }
1868 }
1869 JVM_END
1870
1871 // Constant pool access //////////////////////////////////////////////////////////
1872
1873 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1874 {
1875 JVMWrapper("JVM_GetClassConstantPool");
1876 JvmtiVMObjectAllocEventCollector oam;
1877
1878 // Return null for primitives and arrays
1879 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1880 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1881 if (k->is_instance_klass()) {
1882 InstanceKlass* k_h = InstanceKlass::cast(k);
1883 Handle jcp = reflect_ConstantPool::create(CHECK_NULL);
1884 reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1885 return JNIHandles::make_local(jcp());
1886 }
1887 }
1888 return NULL;
1889 }
1890 JVM_END
1891
1892
1893 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1894 {
1895 JVMWrapper("JVM_ConstantPoolGetSize");
1896 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1897 return cp->length();
1898 }
1899 JVM_END
1900
1901
1902 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1903 {
1904 JVMWrapper("JVM_ConstantPoolGetClassAt");
1905 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1906 bounds_check(cp, index, CHECK_NULL);
1907 constantTag tag = cp->tag_at(index);
1908 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1909 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1910 }
1911 Klass* k = cp->klass_at(index, CHECK_NULL);
1912 return (jclass) JNIHandles::make_local(k->java_mirror());
1913 }
1914 JVM_END
1915
1916 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1917 {
1918 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1919 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1920 bounds_check(cp, index, CHECK_NULL);
1921 constantTag tag = cp->tag_at(index);
1922 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1923 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1924 }
1925 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1926 if (k == NULL) return NULL;
1927 return (jclass) JNIHandles::make_local(k->java_mirror());
1928 }
1929 JVM_END
1930
1931 static jobject get_method_at_helper(const constantPoolHandle& cp, jint index, bool force_resolution, TRAPS) {
1932 constantTag tag = cp->tag_at(index);
1933 if (!tag.is_method() && !tag.is_interface_method()) {
1934 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1935 }
1936 int klass_ref = cp->uncached_klass_ref_index_at(index);
1937 Klass* k_o;
1938 if (force_resolution) {
1939 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1940 } else {
1941 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1942 if (k_o == NULL) return NULL;
1943 }
1944 InstanceKlass* k = InstanceKlass::cast(k_o);
1945 Symbol* name = cp->uncached_name_ref_at(index);
1946 Symbol* sig = cp->uncached_signature_ref_at(index);
1947 methodHandle m (THREAD, k->find_method(name, sig));
1948 if (m.is_null()) {
1949 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1950 }
1951 oop method;
1952 if (!m->is_initializer() || m->is_static()) {
1953 method = Reflection::new_method(m, true, CHECK_NULL);
1954 } else {
1955 method = Reflection::new_constructor(m, CHECK_NULL);
1956 }
1957 return JNIHandles::make_local(method);
1958 }
1959
1960 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1961 {
1962 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1963 JvmtiVMObjectAllocEventCollector oam;
1964 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1965 bounds_check(cp, index, CHECK_NULL);
1966 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1967 return res;
1968 }
1969 JVM_END
1970
1971 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1972 {
1973 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1974 JvmtiVMObjectAllocEventCollector oam;
1975 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1976 bounds_check(cp, index, CHECK_NULL);
1977 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1978 return res;
1979 }
1980 JVM_END
1981
1982 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1983 constantTag tag = cp->tag_at(index);
1984 if (!tag.is_field()) {
1985 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1986 }
1987 int klass_ref = cp->uncached_klass_ref_index_at(index);
1988 Klass* k_o;
1989 if (force_resolution) {
1990 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1991 } else {
1992 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1993 if (k_o == NULL) return NULL;
1994 }
1995 InstanceKlass* k = InstanceKlass::cast(k_o);
1996 Symbol* name = cp->uncached_name_ref_at(index);
1997 Symbol* sig = cp->uncached_signature_ref_at(index);
1998 fieldDescriptor fd;
1999 Klass* target_klass = k->find_field(name, sig, &fd);
2000 if (target_klass == NULL) {
2001 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2002 }
2003 oop field = Reflection::new_field(&fd, CHECK_NULL);
2004 return JNIHandles::make_local(field);
2005 }
2006
2007 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2008 {
2009 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2010 JvmtiVMObjectAllocEventCollector oam;
2011 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2012 bounds_check(cp, index, CHECK_NULL);
2013 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2014 return res;
2015 }
2016 JVM_END
2017
2018 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2019 {
2020 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2021 JvmtiVMObjectAllocEventCollector oam;
2022 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2023 bounds_check(cp, index, CHECK_NULL);
2024 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2025 return res;
2026 }
2027 JVM_END
2028
2029 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2030 {
2031 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2032 JvmtiVMObjectAllocEventCollector oam;
2033 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2034 bounds_check(cp, index, CHECK_NULL);
2035 constantTag tag = cp->tag_at(index);
2036 if (!tag.is_field_or_method()) {
2037 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2038 }
2039 int klass_ref = cp->uncached_klass_ref_index_at(index);
2040 Symbol* klass_name = cp->klass_name_at(klass_ref);
2041 Symbol* member_name = cp->uncached_name_ref_at(index);
2042 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2043 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2044 objArrayHandle dest(THREAD, dest_o);
2045 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2046 dest->obj_at_put(0, str());
2047 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2048 dest->obj_at_put(1, str());
2049 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2050 dest->obj_at_put(2, str());
2051 return (jobjectArray) JNIHandles::make_local(dest());
2052 }
2053 JVM_END
2054
2055 JVM_ENTRY(jint, JVM_ConstantPoolGetClassRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2056 {
2057 JVMWrapper("JVM_ConstantPoolGetClassRefIndexAt");
2058 JvmtiVMObjectAllocEventCollector oam;
2059 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2060 bounds_check(cp, index, CHECK_0);
2061 constantTag tag = cp->tag_at(index);
2062 if (!tag.is_field_or_method()) {
2063 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2064 }
2065 return (jint) cp->uncached_klass_ref_index_at(index);
2066 }
2067 JVM_END
2068
2069 JVM_ENTRY(jint, JVM_ConstantPoolGetNameAndTypeRefIndexAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2070 {
2071 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefIndexAt");
2072 JvmtiVMObjectAllocEventCollector oam;
2073 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2074 bounds_check(cp, index, CHECK_0);
2075 constantTag tag = cp->tag_at(index);
2076 if (!tag.is_invoke_dynamic() && !tag.is_field_or_method()) {
2077 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2078 }
2079 return (jint) cp->uncached_name_and_type_ref_index_at(index);
2080 }
2081 JVM_END
2082
2083 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetNameAndTypeRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2084 {
2085 JVMWrapper("JVM_ConstantPoolGetNameAndTypeRefInfoAt");
2086 JvmtiVMObjectAllocEventCollector oam;
2087 constantPoolHandle cp(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2088 bounds_check(cp, index, CHECK_NULL);
2089 constantTag tag = cp->tag_at(index);
2090 if (!tag.is_name_and_type()) {
2091 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2092 }
2093 Symbol* member_name = cp->symbol_at(cp->name_ref_index_at(index));
2094 Symbol* member_sig = cp->symbol_at(cp->signature_ref_index_at(index));
2095 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 2, CHECK_NULL);
2096 objArrayHandle dest(THREAD, dest_o);
2097 Handle str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2098 dest->obj_at_put(0, str());
2099 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2100 dest->obj_at_put(1, str());
2101 return (jobjectArray) JNIHandles::make_local(dest());
2102 }
2103 JVM_END
2104
2105 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2106 {
2107 JVMWrapper("JVM_ConstantPoolGetIntAt");
2108 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2109 bounds_check(cp, index, CHECK_0);
2110 constantTag tag = cp->tag_at(index);
2111 if (!tag.is_int()) {
2112 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2113 }
2114 return cp->int_at(index);
2115 }
2116 JVM_END
2117
2118 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2119 {
2120 JVMWrapper("JVM_ConstantPoolGetLongAt");
2121 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2122 bounds_check(cp, index, CHECK_(0L));
2123 constantTag tag = cp->tag_at(index);
2124 if (!tag.is_long()) {
2125 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2126 }
2127 return cp->long_at(index);
2128 }
2129 JVM_END
2130
2131 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2132 {
2133 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2134 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2135 bounds_check(cp, index, CHECK_(0.0f));
2136 constantTag tag = cp->tag_at(index);
2137 if (!tag.is_float()) {
2138 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2139 }
2140 return cp->float_at(index);
2141 }
2142 JVM_END
2143
2144 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2145 {
2146 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2147 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2148 bounds_check(cp, index, CHECK_(0.0));
2149 constantTag tag = cp->tag_at(index);
2150 if (!tag.is_double()) {
2151 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2152 }
2153 return cp->double_at(index);
2154 }
2155 JVM_END
2156
2157 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2158 {
2159 JVMWrapper("JVM_ConstantPoolGetStringAt");
2160 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2161 bounds_check(cp, index, CHECK_NULL);
2162 constantTag tag = cp->tag_at(index);
2163 if (!tag.is_string()) {
2164 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2165 }
2166 oop str = cp->string_at(index, CHECK_NULL);
2167 return (jstring) JNIHandles::make_local(str);
2168 }
2169 JVM_END
2170
2171 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2172 {
2173 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2174 JvmtiVMObjectAllocEventCollector oam;
2175 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2176 bounds_check(cp, index, CHECK_NULL);
2177 constantTag tag = cp->tag_at(index);
2178 if (!tag.is_symbol()) {
2179 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2180 }
2181 Symbol* sym = cp->symbol_at(index);
2182 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2183 return (jstring) JNIHandles::make_local(str());
2184 }
2185 JVM_END
2186
2187 JVM_ENTRY(jbyte, JVM_ConstantPoolGetTagAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2188 {
2189 JVMWrapper("JVM_ConstantPoolGetTagAt");
2190 constantPoolHandle cp = constantPoolHandle(THREAD, reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2191 bounds_check(cp, index, CHECK_0);
2192 constantTag tag = cp->tag_at(index);
2193 jbyte result = tag.value();
2194 // If returned tag values are not from the JVM spec, e.g. tags from 100 to 105,
2195 // they are changed to the corresponding tags from the JVM spec, so that java code in
2196 // sun.reflect.ConstantPool will return only tags from the JVM spec, not internal ones.
2197 if (tag.is_klass_or_reference()) {
2198 result = JVM_CONSTANT_Class;
2199 } else if (tag.is_string_index()) {
2200 result = JVM_CONSTANT_String;
2201 } else if (tag.is_method_type_in_error()) {
2202 result = JVM_CONSTANT_MethodType;
2203 } else if (tag.is_method_handle_in_error()) {
2204 result = JVM_CONSTANT_MethodHandle;
2205 } else if (tag.is_dynamic_constant_in_error()) {
2206 result = JVM_CONSTANT_Dynamic;
2207 }
2208 return result;
2209 }
2210 JVM_END
2211
2212 // Assertion support. //////////////////////////////////////////////////////////
2213
2214 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2215 JVMWrapper("JVM_DesiredAssertionStatus");
2216 assert(cls != NULL, "bad class");
2217
2218 oop r = JNIHandles::resolve(cls);
2219 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2220 if (java_lang_Class::is_primitive(r)) return false;
2221
2222 Klass* k = java_lang_Class::as_Klass(r);
2223 assert(k->is_instance_klass(), "must be an instance klass");
2224 if (!k->is_instance_klass()) return false;
2225
2226 ResourceMark rm(THREAD);
2227 const char* name = k->name()->as_C_string();
2228 bool system_class = k->class_loader() == NULL;
2229 return JavaAssertions::enabled(name, system_class);
2230
2231 JVM_END
2232
2233
2234 // Return a new AssertionStatusDirectives object with the fields filled in with
2235 // command-line assertion arguments (i.e., -ea, -da).
2236 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2237 JVMWrapper("JVM_AssertionStatusDirectives");
2238 JvmtiVMObjectAllocEventCollector oam;
2239 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2240 return JNIHandles::make_local(env, asd);
2241 JVM_END
2242
2243 // Verification ////////////////////////////////////////////////////////////////////////////////
2244
2245 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2246
2247 // RedefineClasses support: bug 6214132 caused verification to fail.
2248 // All functions from this section should call the jvmtiThreadSate function:
2249 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2250 // The function returns a Klass* of the _scratch_class if the verifier
2251 // was invoked in the middle of the class redefinition.
2252 // Otherwise it returns its argument value which is the _the_class Klass*.
2253 // Please, refer to the description in the jvmtiThreadSate.hpp.
2254
2255 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2256 JVMWrapper("JVM_GetClassNameUTF");
2257 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2258 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2259 return k->name()->as_utf8();
2260 JVM_END
2261
2262
2263 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2264 JVMWrapper("JVM_GetClassCPTypes");
2265 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2266 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2267 // types will have length zero if this is not an InstanceKlass
2268 // (length is determined by call to JVM_GetClassCPEntriesCount)
2269 if (k->is_instance_klass()) {
2270 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2271 for (int index = cp->length() - 1; index >= 0; index--) {
2272 constantTag tag = cp->tag_at(index);
2273 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2274 }
2275 }
2276 JVM_END
2277
2278
2279 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2280 JVMWrapper("JVM_GetClassCPEntriesCount");
2281 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2282 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2283 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->constants()->length();
2284 JVM_END
2285
2286
2287 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2288 JVMWrapper("JVM_GetClassFieldsCount");
2289 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2290 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2291 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->java_fields_count();
2292 JVM_END
2293
2294
2295 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2296 JVMWrapper("JVM_GetClassMethodsCount");
2297 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2298 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2299 return (!k->is_instance_klass()) ? 0 : InstanceKlass::cast(k)->methods()->length();
2300 JVM_END
2301
2302
2303 // The following methods, used for the verifier, are never called with
2304 // array klasses, so a direct cast to InstanceKlass is safe.
2305 // Typically, these methods are called in a loop with bounds determined
2306 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2307 // zero for arrays.
2308 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2309 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2310 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2311 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2313 int length = method->checked_exceptions_length();
2314 if (length > 0) {
2315 CheckedExceptionElement* table= method->checked_exceptions_start();
2316 for (int i = 0; i < length; i++) {
2317 exceptions[i] = table[i].class_cp_index;
2318 }
2319 }
2320 JVM_END
2321
2322
2323 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2324 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2325 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2326 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2327 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2328 return method->checked_exceptions_length();
2329 JVM_END
2330
2331
2332 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2333 JVMWrapper("JVM_GetMethodIxByteCode");
2334 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2335 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2336 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2337 memcpy(code, method->code_base(), method->code_size());
2338 JVM_END
2339
2340
2341 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2342 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2343 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2344 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2345 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2346 return method->code_size();
2347 JVM_END
2348
2349
2350 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2351 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2352 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2353 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2354 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2355 ExceptionTable extable(method);
2356 entry->start_pc = extable.start_pc(entry_index);
2357 entry->end_pc = extable.end_pc(entry_index);
2358 entry->handler_pc = extable.handler_pc(entry_index);
2359 entry->catchType = extable.catch_type_index(entry_index);
2360 JVM_END
2361
2362
2363 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2364 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2365 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2366 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2367 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2368 return method->exception_table_length();
2369 JVM_END
2370
2371
2372 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2373 JVMWrapper("JVM_GetMethodIxModifiers");
2374 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2375 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2376 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2377 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2378 JVM_END
2379
2380
2381 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2382 JVMWrapper("JVM_GetFieldIxModifiers");
2383 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2384 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2385 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2386 JVM_END
2387
2388
2389 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2390 JVMWrapper("JVM_GetMethodIxLocalsCount");
2391 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2392 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2393 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2394 return method->max_locals();
2395 JVM_END
2396
2397
2398 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2399 JVMWrapper("JVM_GetMethodIxArgsSize");
2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2403 return method->size_of_parameters();
2404 JVM_END
2405
2406
2407 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2408 JVMWrapper("JVM_GetMethodIxMaxStack");
2409 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2410 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2411 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2412 return method->verifier_max_stack();
2413 JVM_END
2414
2415
2416 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2417 JVMWrapper("JVM_IsConstructorIx");
2418 ResourceMark rm(THREAD);
2419 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2420 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2421 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2422 return method->name() == vmSymbols::object_initializer_name();
2423 JVM_END
2424
2425
2426 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2427 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2428 ResourceMark rm(THREAD);
2429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2432 return method->is_overpass();
2433 JVM_END
2434
2435 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2436 JVMWrapper("JVM_GetMethodIxIxUTF");
2437 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2438 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2439 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2440 return method->name()->as_utf8();
2441 JVM_END
2442
2443
2444 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2445 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2446 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2447 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2448 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2449 return method->signature()->as_utf8();
2450 JVM_END
2451
2452 /**
2453 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2454 * read entries in the constant pool. Since the old verifier always
2455 * works on a copy of the code, it will not see any rewriting that
2456 * may possibly occur in the middle of verification. So it is important
2457 * that nothing it calls tries to use the cpCache instead of the raw
2458 * constant pool, so we must use cp->uncached_x methods when appropriate.
2459 */
2460 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2461 JVMWrapper("JVM_GetCPFieldNameUTF");
2462 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2463 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2464 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2465 switch (cp->tag_at(cp_index).value()) {
2466 case JVM_CONSTANT_Fieldref:
2467 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2468 default:
2469 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2470 }
2471 ShouldNotReachHere();
2472 return NULL;
2473 JVM_END
2474
2475
2476 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2477 JVMWrapper("JVM_GetCPMethodNameUTF");
2478 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2479 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2480 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2481 switch (cp->tag_at(cp_index).value()) {
2482 case JVM_CONSTANT_InterfaceMethodref:
2483 case JVM_CONSTANT_Methodref:
2484 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2485 default:
2486 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2487 }
2488 ShouldNotReachHere();
2489 return NULL;
2490 JVM_END
2491
2492
2493 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2494 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2495 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2496 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2497 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2498 switch (cp->tag_at(cp_index).value()) {
2499 case JVM_CONSTANT_InterfaceMethodref:
2500 case JVM_CONSTANT_Methodref:
2501 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2502 default:
2503 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2504 }
2505 ShouldNotReachHere();
2506 return NULL;
2507 JVM_END
2508
2509
2510 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2511 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2512 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2513 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2514 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2515 switch (cp->tag_at(cp_index).value()) {
2516 case JVM_CONSTANT_Fieldref:
2517 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2518 default:
2519 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2520 }
2521 ShouldNotReachHere();
2522 return NULL;
2523 JVM_END
2524
2525
2526 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2527 JVMWrapper("JVM_GetCPClassNameUTF");
2528 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2529 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2530 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2531 Symbol* classname = cp->klass_name_at(cp_index);
2532 return classname->as_utf8();
2533 JVM_END
2534
2535
2536 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2537 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2538 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2539 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2540 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2541 switch (cp->tag_at(cp_index).value()) {
2542 case JVM_CONSTANT_Fieldref: {
2543 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2544 Symbol* classname = cp->klass_name_at(class_index);
2545 return classname->as_utf8();
2546 }
2547 default:
2548 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2549 }
2550 ShouldNotReachHere();
2551 return NULL;
2552 JVM_END
2553
2554
2555 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2556 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2557 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2558 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2559 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2560 switch (cp->tag_at(cp_index).value()) {
2561 case JVM_CONSTANT_Methodref:
2562 case JVM_CONSTANT_InterfaceMethodref: {
2563 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2564 Symbol* classname = cp->klass_name_at(class_index);
2565 return classname->as_utf8();
2566 }
2567 default:
2568 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2569 }
2570 ShouldNotReachHere();
2571 return NULL;
2572 JVM_END
2573
2574
2575 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2576 JVMWrapper("JVM_GetCPFieldModifiers");
2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2578 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2581 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2582 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2583 switch (cp->tag_at(cp_index).value()) {
2584 case JVM_CONSTANT_Fieldref: {
2585 Symbol* name = cp->uncached_name_ref_at(cp_index);
2586 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2587 InstanceKlass* ik = InstanceKlass::cast(k_called);
2588 for (JavaFieldStream fs(ik); !fs.done(); fs.next()) {
2589 if (fs.name() == name && fs.signature() == signature) {
2590 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2591 }
2592 }
2593 return -1;
2594 }
2595 default:
2596 fatal("JVM_GetCPFieldModifiers: illegal constant");
2597 }
2598 ShouldNotReachHere();
2599 return 0;
2600 JVM_END
2601
2602
2603 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2604 JVMWrapper("JVM_GetCPMethodModifiers");
2605 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2606 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2607 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2608 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2609 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2610 switch (cp->tag_at(cp_index).value()) {
2611 case JVM_CONSTANT_Methodref:
2612 case JVM_CONSTANT_InterfaceMethodref: {
2613 Symbol* name = cp->uncached_name_ref_at(cp_index);
2614 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2615 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2616 int methods_count = methods->length();
2617 for (int i = 0; i < methods_count; i++) {
2618 Method* method = methods->at(i);
2619 if (method->name() == name && method->signature() == signature) {
2620 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2621 }
2622 }
2623 return -1;
2624 }
2625 default:
2626 fatal("JVM_GetCPMethodModifiers: illegal constant");
2627 }
2628 ShouldNotReachHere();
2629 return 0;
2630 JVM_END
2631
2632
2633 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2634
2635 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2636 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2637 JVM_END
2638
2639
2640 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2641 JVMWrapper("JVM_IsSameClassPackage");
2642 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2643 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2644 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2645 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2646 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2647 JVM_END
2648
2649 // Printing support //////////////////////////////////////////////////
2650 extern "C" {
2651
2652 ATTRIBUTE_PRINTF(3, 0)
2653 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2654 // Reject count values that are negative signed values converted to
2655 // unsigned; see bug 4399518, 4417214
2656 if ((intptr_t)count <= 0) return -1;
2657
2658 int result = os::vsnprintf(str, count, fmt, args);
2659 if (result > 0 && (size_t)result >= count) {
2660 result = -1;
2661 }
2662
2663 return result;
2664 }
2665
2666 ATTRIBUTE_PRINTF(3, 4)
2667 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2668 va_list args;
2669 int len;
2670 va_start(args, fmt);
2671 len = jio_vsnprintf(str, count, fmt, args);
2672 va_end(args);
2673 return len;
2674 }
2675
2676 ATTRIBUTE_PRINTF(2, 3)
2677 int jio_fprintf(FILE* f, const char *fmt, ...) {
2678 int len;
2679 va_list args;
2680 va_start(args, fmt);
2681 len = jio_vfprintf(f, fmt, args);
2682 va_end(args);
2683 return len;
2684 }
2685
2686 ATTRIBUTE_PRINTF(2, 0)
2687 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2688 if (Arguments::vfprintf_hook() != NULL) {
2689 return Arguments::vfprintf_hook()(f, fmt, args);
2690 } else {
2691 return vfprintf(f, fmt, args);
2692 }
2693 }
2694
2695 ATTRIBUTE_PRINTF(1, 2)
2696 JNIEXPORT int jio_printf(const char *fmt, ...) {
2697 int len;
2698 va_list args;
2699 va_start(args, fmt);
2700 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2701 va_end(args);
2702 return len;
2703 }
2704
2705 // HotSpot specific jio method
2706 void jio_print(const char* s, size_t len) {
2707 // Try to make this function as atomic as possible.
2708 if (Arguments::vfprintf_hook() != NULL) {
2709 jio_fprintf(defaultStream::output_stream(), "%.*s", (int)len, s);
2710 } else {
2711 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2712 size_t count = ::write(defaultStream::output_fd(), s, (int)len);
2713 }
2714 }
2715
2716 } // Extern C
2717
2718 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2719
2720 // In most of the JVM thread support functions we need to access the
2721 // thread through a ThreadsListHandle to prevent it from exiting and
2722 // being reclaimed while we try to operate on it. The exceptions to this
2723 // rule are when operating on the current thread, or if the monitor of
2724 // the target java.lang.Thread is locked at the Java level - in both
2725 // cases the target cannot exit.
2726
2727 static void thread_entry(JavaThread* thread, TRAPS) {
2728 HandleMark hm(THREAD);
2729 Handle obj(THREAD, thread->threadObj());
2730 JavaValue result(T_VOID);
2731 JavaCalls::call_virtual(&result,
2732 obj,
2733 SystemDictionary::Thread_klass(),
2734 vmSymbols::run_method_name(),
2735 vmSymbols::void_method_signature(),
2736 THREAD);
2737 }
2738
2739
2740 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2741 JVMWrapper("JVM_StartThread");
2742 JavaThread *native_thread = NULL;
2743
2744 // We cannot hold the Threads_lock when we throw an exception,
2745 // due to rank ordering issues. Example: we might need to grab the
2746 // Heap_lock while we construct the exception.
2747 bool throw_illegal_thread_state = false;
2748
2749 // We must release the Threads_lock before we can post a jvmti event
2750 // in Thread::start.
2751 {
2752 // Ensure that the C++ Thread and OSThread structures aren't freed before
2753 // we operate.
2754 MutexLocker mu(Threads_lock);
2755
2756 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2757 // re-starting an already started thread, so we should usually find
2758 // that the JavaThread is null. However for a JNI attached thread
2759 // there is a small window between the Thread object being created
2760 // (with its JavaThread set) and the update to its threadStatus, so we
2761 // have to check for this
2762 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2763 throw_illegal_thread_state = true;
2764 } else {
2765 // We could also check the stillborn flag to see if this thread was already stopped, but
2766 // for historical reasons we let the thread detect that itself when it starts running
2767
2768 jlong size =
2769 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2770 // Allocate the C++ Thread structure and create the native thread. The
2771 // stack size retrieved from java is 64-bit signed, but the constructor takes
2772 // size_t (an unsigned type), which may be 32 or 64-bit depending on the platform.
2773 // - Avoid truncating on 32-bit platforms if size is greater than UINT_MAX.
2774 // - Avoid passing negative values which would result in really large stacks.
2775 NOT_LP64(if (size > SIZE_MAX) size = SIZE_MAX;)
2776 size_t sz = size > 0 ? (size_t) size : 0;
2777 native_thread = new JavaThread(&thread_entry, sz);
2778
2779 // At this point it may be possible that no osthread was created for the
2780 // JavaThread due to lack of memory. Check for this situation and throw
2781 // an exception if necessary. Eventually we may want to change this so
2782 // that we only grab the lock if the thread was created successfully -
2783 // then we can also do this check and throw the exception in the
2784 // JavaThread constructor.
2785 if (native_thread->osthread() != NULL) {
2786 // Note: the current thread is not being used within "prepare".
2787 native_thread->prepare(jthread);
2788 }
2789 }
2790 }
2791
2792 if (throw_illegal_thread_state) {
2793 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2794 }
2795
2796 assert(native_thread != NULL, "Starting null thread?");
2797
2798 if (native_thread->osthread() == NULL) {
2799 // No one should hold a reference to the 'native_thread'.
2800 native_thread->smr_delete();
2801 if (JvmtiExport::should_post_resource_exhausted()) {
2802 JvmtiExport::post_resource_exhausted(
2803 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2804 os::native_thread_creation_failed_msg());
2805 }
2806 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2807 os::native_thread_creation_failed_msg());
2808 }
2809
2810 Thread::start(native_thread);
2811
2812 JVM_END
2813
2814
2815 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2816 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2817 // but is thought to be reliable and simple. In the case, where the receiver is the
2818 // same thread as the sender, no VM_Operation is needed.
2819 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2820 JVMWrapper("JVM_StopThread");
2821
2822 // A nested ThreadsListHandle will grab the Threads_lock so create
2823 // tlh before we resolve throwable.
2824 ThreadsListHandle tlh(thread);
2825 oop java_throwable = JNIHandles::resolve(throwable);
2826 if (java_throwable == NULL) {
2827 THROW(vmSymbols::java_lang_NullPointerException());
2828 }
2829 oop java_thread = NULL;
2830 JavaThread* receiver = NULL;
2831 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2832 Events::log_exception(thread,
2833 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2834 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2835
2836 if (is_alive) {
2837 // jthread refers to a live JavaThread.
2838 if (thread == receiver) {
2839 // Exception is getting thrown at self so no VM_Operation needed.
2840 THROW_OOP(java_throwable);
2841 } else {
2842 // Use a VM_Operation to throw the exception.
2843 Thread::send_async_exception(java_thread, java_throwable);
2844 }
2845 } else {
2846 // Either:
2847 // - target thread has not been started before being stopped, or
2848 // - target thread already terminated
2849 // We could read the threadStatus to determine which case it is
2850 // but that is overkill as it doesn't matter. We must set the
2851 // stillborn flag for the first case, and if the thread has already
2852 // exited setting this flag has no effect.
2853 java_lang_Thread::set_stillborn(java_thread);
2854 }
2855 JVM_END
2856
2857
2858 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2859 JVMWrapper("JVM_IsThreadAlive");
2860
2861 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2862 return java_lang_Thread::is_alive(thread_oop);
2863 JVM_END
2864
2865
2866 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2867 JVMWrapper("JVM_SuspendThread");
2868
2869 ThreadsListHandle tlh(thread);
2870 JavaThread* receiver = NULL;
2871 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2872 if (is_alive) {
2873 // jthread refers to a live JavaThread.
2874 {
2875 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2876 if (receiver->is_external_suspend()) {
2877 // Don't allow nested external suspend requests. We can't return
2878 // an error from this interface so just ignore the problem.
2879 return;
2880 }
2881 if (receiver->is_exiting()) { // thread is in the process of exiting
2882 return;
2883 }
2884 receiver->set_external_suspend();
2885 }
2886
2887 // java_suspend() will catch threads in the process of exiting
2888 // and will ignore them.
2889 receiver->java_suspend();
2890
2891 // It would be nice to have the following assertion in all the
2892 // time, but it is possible for a racing resume request to have
2893 // resumed this thread right after we suspended it. Temporarily
2894 // enable this assertion if you are chasing a different kind of
2895 // bug.
2896 //
2897 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2898 // receiver->is_being_ext_suspended(), "thread is not suspended");
2899 }
2900 JVM_END
2901
2902
2903 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2904 JVMWrapper("JVM_ResumeThread");
2905
2906 ThreadsListHandle tlh(thread);
2907 JavaThread* receiver = NULL;
2908 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
2909 if (is_alive) {
2910 // jthread refers to a live JavaThread.
2911
2912 // This is the original comment for this Threads_lock grab:
2913 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2914 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2915 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2916 // looks at it.
2917 //
2918 // The above comment dates back to when we had both internal and
2919 // external suspend APIs that shared a common underlying mechanism.
2920 // External suspend is now entirely cooperative and doesn't share
2921 // anything with internal suspend. That said, there are some
2922 // assumptions in the VM that an external resume grabs the
2923 // Threads_lock. We can't drop the Threads_lock grab here until we
2924 // resolve the assumptions that exist elsewhere.
2925 //
2926 MutexLocker ml(Threads_lock);
2927 receiver->java_resume();
2928 }
2929 JVM_END
2930
2931
2932 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2933 JVMWrapper("JVM_SetThreadPriority");
2934
2935 ThreadsListHandle tlh(thread);
2936 oop java_thread = NULL;
2937 JavaThread* receiver = NULL;
2938 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, &java_thread);
2939 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2940
2941 if (is_alive) {
2942 // jthread refers to a live JavaThread.
2943 Thread::set_priority(receiver, (ThreadPriority)prio);
2944 }
2945 // Implied else: If the JavaThread hasn't started yet, then the
2946 // priority set in the java.lang.Thread object above will be pushed
2947 // down when it does start.
2948 JVM_END
2949
2950
2951 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2952 JVMWrapper("JVM_Yield");
2953 if (os::dont_yield()) return;
2954 HOTSPOT_THREAD_YIELD();
2955 os::naked_yield();
2956 JVM_END
2957
2958 static void post_thread_sleep_event(EventThreadSleep* event, jlong millis) {
2959 assert(event != NULL, "invariant");
2960 assert(event->should_commit(), "invariant");
2961 event->set_time(millis);
2962 event->commit();
2963 }
2964
2965 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2966 JVMWrapper("JVM_Sleep");
2967
2968 if (millis < 0) {
2969 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2970 }
2971
2972 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2973 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2974 }
2975
2976 // Save current thread state and restore it at the end of this block.
2977 // And set new thread state to SLEEPING.
2978 JavaThreadSleepState jtss(thread);
2979
2980 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2981 EventThreadSleep event;
2982
2983 if (millis == 0) {
2984 os::naked_yield();
2985 } else {
2986 ThreadState old_state = thread->osthread()->get_state();
2987 thread->osthread()->set_state(SLEEPING);
2988 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2989 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2990 // us while we were sleeping. We do not overwrite those.
2991 if (!HAS_PENDING_EXCEPTION) {
2992 if (event.should_commit()) {
2993 post_thread_sleep_event(&event, millis);
2994 }
2995 HOTSPOT_THREAD_SLEEP_END(1);
2996
2997 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2998 // to properly restore the thread state. That's likely wrong.
2999 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3000 }
3001 }
3002 thread->osthread()->set_state(old_state);
3003 }
3004 if (event.should_commit()) {
3005 post_thread_sleep_event(&event, millis);
3006 }
3007 HOTSPOT_THREAD_SLEEP_END(0);
3008 JVM_END
3009
3010 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3011 JVMWrapper("JVM_CurrentThread");
3012 oop jthread = thread->threadObj();
3013 assert (thread != NULL, "no current thread!");
3014 return JNIHandles::make_local(env, jthread);
3015 JVM_END
3016
3017
3018 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3019 JVMWrapper("JVM_CountStackFrames");
3020
3021 uint32_t debug_bits = 0;
3022 ThreadsListHandle tlh(thread);
3023 JavaThread* receiver = NULL;
3024 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3025 int count = 0;
3026 if (is_alive) {
3027 // jthread refers to a live JavaThread.
3028 if (receiver->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
3029 // Count all java activation, i.e., number of vframes.
3030 for (vframeStream vfst(receiver); !vfst.at_end(); vfst.next()) {
3031 // Native frames are not counted.
3032 if (!vfst.method()->is_native()) count++;
3033 }
3034 } else {
3035 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3036 "this thread is not suspended");
3037 }
3038 }
3039 // Implied else: if JavaThread is not alive simply return a count of 0.
3040
3041 return count;
3042 JVM_END
3043
3044
3045 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3046 JVMWrapper("JVM_Interrupt");
3047
3048 ThreadsListHandle tlh(thread);
3049 JavaThread* receiver = NULL;
3050 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3051 if (is_alive) {
3052 // jthread refers to a live JavaThread.
3053 Thread::interrupt(receiver);
3054 }
3055 JVM_END
3056
3057
3058 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3059 JVMWrapper("JVM_IsInterrupted");
3060
3061 ThreadsListHandle tlh(thread);
3062 JavaThread* receiver = NULL;
3063 bool is_alive = tlh.cv_internal_thread_to_JavaThread(jthread, &receiver, NULL);
3064 if (is_alive) {
3065 // jthread refers to a live JavaThread.
3066 return (jboolean) Thread::is_interrupted(receiver, clear_interrupted != 0);
3067 } else {
3068 return JNI_FALSE;
3069 }
3070 JVM_END
3071
3072
3073 // Return true iff the current thread has locked the object passed in
3074
3075 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3076 JVMWrapper("JVM_HoldsLock");
3077 assert(THREAD->is_Java_thread(), "sanity check");
3078 if (obj == NULL) {
3079 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3080 }
3081 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3082 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3083 JVM_END
3084
3085
3086 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3087 JVMWrapper("JVM_DumpAllStacks");
3088 VM_PrintThreads op;
3089 VMThread::execute(&op);
3090 if (JvmtiExport::should_post_data_dump()) {
3091 JvmtiExport::post_data_dump();
3092 }
3093 JVM_END
3094
3095 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3096 JVMWrapper("JVM_SetNativeThreadName");
3097
3098 // We don't use a ThreadsListHandle here because the current thread
3099 // must be alive.
3100 oop java_thread = JNIHandles::resolve_non_null(jthread);
3101 JavaThread* thr = java_lang_Thread::thread(java_thread);
3102 if (thread == thr && !thr->has_attached_via_jni()) {
3103 // Thread naming is only supported for the current thread and
3104 // we don't set the name of an attached thread to avoid stepping
3105 // on other programs.
3106 ResourceMark rm(thread);
3107 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3108 os::set_native_thread_name(thread_name);
3109 }
3110 JVM_END
3111
3112 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3113
3114 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3115 JVMWrapper("JVM_GetClassContext");
3116 ResourceMark rm(THREAD);
3117 JvmtiVMObjectAllocEventCollector oam;
3118 vframeStream vfst(thread);
3119
3120 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3121 // This must only be called from SecurityManager.getClassContext
3122 Method* m = vfst.method();
3123 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3124 m->name() == vmSymbols::getClassContext_name() &&
3125 m->signature() == vmSymbols::void_class_array_signature())) {
3126 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3127 }
3128 }
3129
3130 // Collect method holders
3131 GrowableArray<Klass*>* klass_array = new GrowableArray<Klass*>();
3132 for (; !vfst.at_end(); vfst.security_next()) {
3133 Method* m = vfst.method();
3134 // Native frames are not returned
3135 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3136 Klass* holder = m->method_holder();
3137 assert(holder->is_klass(), "just checking");
3138 klass_array->append(holder);
3139 }
3140 }
3141
3142 // Create result array of type [Ljava/lang/Class;
3143 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3144 // Fill in mirrors corresponding to method holders
3145 for (int i = 0; i < klass_array->length(); i++) {
3146 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3147 }
3148
3149 return (jobjectArray) JNIHandles::make_local(env, result);
3150 JVM_END
3151
3152
3153 // java.lang.Package ////////////////////////////////////////////////////////////////
3154
3155
3156 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3157 JVMWrapper("JVM_GetSystemPackage");
3158 ResourceMark rm(THREAD);
3159 JvmtiVMObjectAllocEventCollector oam;
3160 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3161 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3162 return (jstring) JNIHandles::make_local(result);
3163 JVM_END
3164
3165
3166 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3167 JVMWrapper("JVM_GetSystemPackages");
3168 JvmtiVMObjectAllocEventCollector oam;
3169 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3170 return (jobjectArray) JNIHandles::make_local(result);
3171 JVM_END
3172
3173
3174 // java.lang.ref.Reference ///////////////////////////////////////////////////////////////
3175
3176
3177 JVM_ENTRY(jobject, JVM_GetAndClearReferencePendingList(JNIEnv* env))
3178 JVMWrapper("JVM_GetAndClearReferencePendingList");
3179
3180 MonitorLockerEx ml(Heap_lock);
3181 oop ref = Universe::reference_pending_list();
3182 if (ref != NULL) {
3183 Universe::set_reference_pending_list(NULL);
3184 }
3185 return JNIHandles::make_local(env, ref);
3186 JVM_END
3187
3188 JVM_ENTRY(jboolean, JVM_HasReferencePendingList(JNIEnv* env))
3189 JVMWrapper("JVM_HasReferencePendingList");
3190 MonitorLockerEx ml(Heap_lock);
3191 return Universe::has_reference_pending_list();
3192 JVM_END
3193
3194 JVM_ENTRY(void, JVM_WaitForReferencePendingList(JNIEnv* env))
3195 JVMWrapper("JVM_WaitForReferencePendingList");
3196 MonitorLockerEx ml(Heap_lock);
3197 while (!Universe::has_reference_pending_list()) {
3198 ml.wait();
3199 }
3200 JVM_END
3201
3202
3203 // ObjectInputStream ///////////////////////////////////////////////////////////////
3204
3205 // Return the first user-defined class loader up the execution stack, or null
3206 // if only code from the bootstrap or platform class loader is on the stack.
3207
3208 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3209 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3210 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3211 oop loader = vfst.method()->method_holder()->class_loader();
3212 if (loader != NULL && !SystemDictionary::is_platform_class_loader(loader)) {
3213 return JNIHandles::make_local(env, loader);
3214 }
3215 }
3216 return NULL;
3217 JVM_END
3218
3219
3220 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3221
3222
3223 // resolve array handle and check arguments
3224 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3225 if (arr == NULL) {
3226 THROW_0(vmSymbols::java_lang_NullPointerException());
3227 }
3228 oop a = JNIHandles::resolve_non_null(arr);
3229 if (!a->is_array()) {
3230 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3231 } else if (type_array_only && !a->is_typeArray()) {
3232 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3233 }
3234 return arrayOop(a);
3235 }
3236
3237
3238 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3239 JVMWrapper("JVM_GetArrayLength");
3240 arrayOop a = check_array(env, arr, false, CHECK_0);
3241 return a->length();
3242 JVM_END
3243
3244
3245 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3246 JVMWrapper("JVM_Array_Get");
3247 JvmtiVMObjectAllocEventCollector oam;
3248 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3249 jvalue value;
3250 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3251 oop box = Reflection::box(&value, type, CHECK_NULL);
3252 return JNIHandles::make_local(env, box);
3253 JVM_END
3254
3255
3256 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3257 JVMWrapper("JVM_GetPrimitiveArrayElement");
3258 jvalue value;
3259 value.i = 0; // to initialize value before getting used in CHECK
3260 arrayOop a = check_array(env, arr, true, CHECK_(value));
3261 assert(a->is_typeArray(), "just checking");
3262 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3263 BasicType wide_type = (BasicType) wCode;
3264 if (type != wide_type) {
3265 Reflection::widen(&value, type, wide_type, CHECK_(value));
3266 }
3267 return value;
3268 JVM_END
3269
3270
3271 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3272 JVMWrapper("JVM_SetArrayElement");
3273 arrayOop a = check_array(env, arr, false, CHECK);
3274 oop box = JNIHandles::resolve(val);
3275 jvalue value;
3276 value.i = 0; // to initialize value before getting used in CHECK
3277 BasicType value_type;
3278 if (a->is_objArray()) {
3279 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3280 value_type = Reflection::unbox_for_regular_object(box, &value);
3281 } else {
3282 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3283 }
3284 Reflection::array_set(&value, a, index, value_type, CHECK);
3285 JVM_END
3286
3287
3288 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3289 JVMWrapper("JVM_SetPrimitiveArrayElement");
3290 arrayOop a = check_array(env, arr, true, CHECK);
3291 assert(a->is_typeArray(), "just checking");
3292 BasicType value_type = (BasicType) vCode;
3293 Reflection::array_set(&v, a, index, value_type, CHECK);
3294 JVM_END
3295
3296
3297 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3298 JVMWrapper("JVM_NewArray");
3299 JvmtiVMObjectAllocEventCollector oam;
3300 oop element_mirror = JNIHandles::resolve(eltClass);
3301 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3302 return JNIHandles::make_local(env, result);
3303 JVM_END
3304
3305
3306 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3307 JVMWrapper("JVM_NewMultiArray");
3308 JvmtiVMObjectAllocEventCollector oam;
3309 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3310 oop element_mirror = JNIHandles::resolve(eltClass);
3311 assert(dim_array->is_typeArray(), "just checking");
3312 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3313 return JNIHandles::make_local(env, result);
3314 JVM_END
3315
3316
3317 // Library support ///////////////////////////////////////////////////////////////////////////
3318
3319 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3320 //%note jvm_ct
3321 JVMWrapper("JVM_LoadLibrary");
3322 char ebuf[1024];
3323 void *load_result;
3324 {
3325 ThreadToNativeFromVM ttnfvm(thread);
3326 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3327 }
3328 if (load_result == NULL) {
3329 char msg[1024];
3330 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3331 // Since 'ebuf' may contain a string encoded using
3332 // platform encoding scheme, we need to pass
3333 // Exceptions::unsafe_to_utf8 to the new_exception method
3334 // as the last argument. See bug 6367357.
3335 Handle h_exception =
3336 Exceptions::new_exception(thread,
3337 vmSymbols::java_lang_UnsatisfiedLinkError(),
3338 msg, Exceptions::unsafe_to_utf8);
3339
3340 THROW_HANDLE_0(h_exception);
3341 }
3342 return load_result;
3343 JVM_END
3344
3345
3346 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3347 JVMWrapper("JVM_UnloadLibrary");
3348 os::dll_unload(handle);
3349 JVM_END
3350
3351
3352 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3353 JVMWrapper("JVM_FindLibraryEntry");
3354 return os::dll_lookup(handle, name);
3355 JVM_END
3356
3357
3358 // JNI version ///////////////////////////////////////////////////////////////////////////////
3359
3360 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3361 JVMWrapper("JVM_IsSupportedJNIVersion");
3362 return Threads::is_supported_jni_version_including_1_1(version);
3363 JVM_END
3364
3365
3366 // String support ///////////////////////////////////////////////////////////////////////////
3367
3368 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3369 JVMWrapper("JVM_InternString");
3370 JvmtiVMObjectAllocEventCollector oam;
3371 if (str == NULL) return NULL;
3372 oop string = JNIHandles::resolve_non_null(str);
3373 oop result = StringTable::intern(string, CHECK_NULL);
3374 return (jstring) JNIHandles::make_local(env, result);
3375 JVM_END
3376
3377
3378 // Raw monitor support //////////////////////////////////////////////////////////////////////
3379
3380 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3381 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3382 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3383 // that only works with java threads.
3384
3385
3386 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3387 VM_Exit::block_if_vm_exited();
3388 JVMWrapper("JVM_RawMonitorCreate");
3389 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3390 }
3391
3392
3393 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3394 VM_Exit::block_if_vm_exited();
3395 JVMWrapper("JVM_RawMonitorDestroy");
3396 delete ((Mutex*) mon);
3397 }
3398
3399
3400 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3401 VM_Exit::block_if_vm_exited();
3402 JVMWrapper("JVM_RawMonitorEnter");
3403 ((Mutex*) mon)->jvm_raw_lock();
3404 return 0;
3405 }
3406
3407
3408 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3409 VM_Exit::block_if_vm_exited();
3410 JVMWrapper("JVM_RawMonitorExit");
3411 ((Mutex*) mon)->jvm_raw_unlock();
3412 }
3413
3414
3415 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3416
3417 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3418 Handle loader, Handle protection_domain,
3419 jboolean throwError, TRAPS) {
3420 // Security Note:
3421 // The Java level wrapper will perform the necessary security check allowing
3422 // us to pass the NULL as the initiating class loader. The VM is responsible for
3423 // the checkPackageAccess relative to the initiating class loader via the
3424 // protection_domain. The protection_domain is passed as NULL by the java code
3425 // if there is no security manager in 3-arg Class.forName().
3426 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3427
3428 // Check if we should initialize the class
3429 if (init && klass->is_instance_klass()) {
3430 klass->initialize(CHECK_NULL);
3431 }
3432 return (jclass) JNIHandles::make_local(env, klass->java_mirror());
3433 }
3434
3435
3436 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3437
3438 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3439 JVMWrapper("JVM_InvokeMethod");
3440 Handle method_handle;
3441 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3442 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3443 Handle receiver(THREAD, JNIHandles::resolve(obj));
3444 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3445 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3446 jobject res = JNIHandles::make_local(env, result);
3447 if (JvmtiExport::should_post_vm_object_alloc()) {
3448 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3449 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3450 if (java_lang_Class::is_primitive(ret_type)) {
3451 // Only for primitive type vm allocates memory for java object.
3452 // See box() method.
3453 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3454 }
3455 }
3456 return res;
3457 } else {
3458 THROW_0(vmSymbols::java_lang_StackOverflowError());
3459 }
3460 JVM_END
3461
3462
3463 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3464 JVMWrapper("JVM_NewInstanceFromConstructor");
3465 oop constructor_mirror = JNIHandles::resolve(c);
3466 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3467 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3468 jobject res = JNIHandles::make_local(env, result);
3469 if (JvmtiExport::should_post_vm_object_alloc()) {
3470 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3471 }
3472 return res;
3473 JVM_END
3474
3475 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3476
3477 JVM_LEAF(jboolean, JVM_SupportsCX8())
3478 JVMWrapper("JVM_SupportsCX8");
3479 return VM_Version::supports_cx8();
3480 JVM_END
3481
3482 JVM_ENTRY(void, JVM_InitializeFromArchive(JNIEnv* env, jclass cls))
3483 JVMWrapper("JVM_InitializeFromArchive");
3484 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
3485 assert(k->is_klass(), "just checking");
3486 HeapShared::initialize_from_archived_subgraph(k);
3487 JVM_END
3488
3489 // Returns an array of all live Thread objects (VM internal JavaThreads,
3490 // jvmti agent threads, and JNI attaching threads are skipped)
3491 // See CR 6404306 regarding JNI attaching threads
3492 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3493 ResourceMark rm(THREAD);
3494 ThreadsListEnumerator tle(THREAD, false, false);
3495 JvmtiVMObjectAllocEventCollector oam;
3496
3497 int num_threads = tle.num_threads();
3498 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3499 objArrayHandle threads_ah(THREAD, r);
3500
3501 for (int i = 0; i < num_threads; i++) {
3502 Handle h = tle.get_threadObj(i);
3503 threads_ah->obj_at_put(i, h());
3504 }
3505
3506 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3507 JVM_END
3508
3509
3510 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3511 // Return StackTraceElement[][], each element is the stack trace of a thread in
3512 // the corresponding entry in the given threads array
3513 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3514 JVMWrapper("JVM_DumpThreads");
3515 JvmtiVMObjectAllocEventCollector oam;
3516
3517 // Check if threads is null
3518 if (threads == NULL) {
3519 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3520 }
3521
3522 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3523 objArrayHandle ah(THREAD, a);
3524 int num_threads = ah->length();
3525 // check if threads is non-empty array
3526 if (num_threads == 0) {
3527 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3528 }
3529
3530 // check if threads is not an array of objects of Thread class
3531 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3532 if (k != SystemDictionary::Thread_klass()) {
3533 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3534 }
3535
3536 ResourceMark rm(THREAD);
3537
3538 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3539 for (int i = 0; i < num_threads; i++) {
3540 oop thread_obj = ah->obj_at(i);
3541 instanceHandle h(THREAD, (instanceOop) thread_obj);
3542 thread_handle_array->append(h);
3543 }
3544
3545 // The JavaThread references in thread_handle_array are validated
3546 // in VM_ThreadDump::doit().
3547 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3548 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3549
3550 JVM_END
3551
3552 // JVM monitoring and management support
3553 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3554 return Management::get_jmm_interface(version);
3555 JVM_END
3556
3557 // com.sun.tools.attach.VirtualMachine agent properties support
3558 //
3559 // Initialize the agent properties with the properties maintained in the VM
3560 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3561 JVMWrapper("JVM_InitAgentProperties");
3562 ResourceMark rm;
3563
3564 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3565
3566 PUTPROP(props, "sun.java.command", Arguments::java_command());
3567 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3568 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3569 return properties;
3570 JVM_END
3571
3572 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3573 {
3574 JVMWrapper("JVM_GetEnclosingMethodInfo");
3575 JvmtiVMObjectAllocEventCollector oam;
3576
3577 if (ofClass == NULL) {
3578 return NULL;
3579 }
3580 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3581 // Special handling for primitive objects
3582 if (java_lang_Class::is_primitive(mirror())) {
3583 return NULL;
3584 }
3585 Klass* k = java_lang_Class::as_Klass(mirror());
3586 if (!k->is_instance_klass()) {
3587 return NULL;
3588 }
3589 InstanceKlass* ik = InstanceKlass::cast(k);
3590 int encl_method_class_idx = ik->enclosing_method_class_index();
3591 if (encl_method_class_idx == 0) {
3592 return NULL;
3593 }
3594 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3595 objArrayHandle dest(THREAD, dest_o);
3596 Klass* enc_k = ik->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3597 dest->obj_at_put(0, enc_k->java_mirror());
3598 int encl_method_method_idx = ik->enclosing_method_method_index();
3599 if (encl_method_method_idx != 0) {
3600 Symbol* sym = ik->constants()->symbol_at(
3601 extract_low_short_from_int(
3602 ik->constants()->name_and_type_at(encl_method_method_idx)));
3603 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3604 dest->obj_at_put(1, str());
3605 sym = ik->constants()->symbol_at(
3606 extract_high_short_from_int(
3607 ik->constants()->name_and_type_at(encl_method_method_idx)));
3608 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3609 dest->obj_at_put(2, str());
3610 }
3611 return (jobjectArray) JNIHandles::make_local(dest());
3612 }
3613 JVM_END
3614
3615 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3616 {
3617 memset(info, 0, info_size);
3618
3619 info->jvm_version = VM_Version::jvm_version();
3620 info->patch_version = VM_Version::vm_patch_version();
3621
3622 // when we add a new capability in the jvm_version_info struct, we should also
3623 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3624 // counter defined in runtimeService.cpp.
3625 info->is_attach_supported = AttachListener::is_attach_supported();
3626 }
3627 JVM_END
3628
3629 // Returns an array of java.lang.String objects containing the input arguments to the VM.
3630 JVM_ENTRY(jobjectArray, JVM_GetVmArguments(JNIEnv *env))
3631 ResourceMark rm(THREAD);
3632
3633 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) {
3634 return NULL;
3635 }
3636
3637 char** vm_flags = Arguments::jvm_flags_array();
3638 char** vm_args = Arguments::jvm_args_array();
3639 int num_flags = Arguments::num_jvm_flags();
3640 int num_args = Arguments::num_jvm_args();
3641
3642 InstanceKlass* ik = SystemDictionary::String_klass();
3643 objArrayOop r = oopFactory::new_objArray(ik, num_args + num_flags, CHECK_NULL);
3644 objArrayHandle result_h(THREAD, r);
3645
3646 int index = 0;
3647 for (int j = 0; j < num_flags; j++, index++) {
3648 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL);
3649 result_h->obj_at_put(index, h());
3650 }
3651 for (int i = 0; i < num_args; i++, index++) {
3652 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL);
3653 result_h->obj_at_put(index, h());
3654 }
3655 return (jobjectArray) JNIHandles::make_local(env, result_h());
3656 JVM_END
3657
3658 JVM_ENTRY_NO_ENV(jint, JVM_FindSignal(const char *name))
3659 return os::get_signal_number(name);
3660 JVM_END
3661
3662 JNIEXPORT void JNICALL
3663 JVM_callFileReadBytes(JNIEnv* env, jint nr_of_read_bytes) {
3664 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env);
3665 THREAD->statistical_info().incrBytesReadFromFile(nr_of_read_bytes);
3666 }
3667
3668 JNIEXPORT void JNICALL
3669 JVM_callFileWriteBytes(JNIEnv* env, jint nr_of_written_bytes) {
3670 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env);
3671 THREAD->statistical_info().incrBytesWrittenToFile(nr_of_written_bytes);
3672 }
3673
3674 JNIEXPORT void JNICALL
3675 JVM_callNetworkReadBytes(JNIEnv* env, jint nr_of_read_bytes) {
3676 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env);
3677 THREAD->statistical_info().incrBytesReadFromNetwork(nr_of_read_bytes);
3678 }
3679
3680 JNIEXPORT void JNICALL
3681 JVM_callNetworkWriteBytes(JNIEnv* env, jint nr_of_written_bytes) {
3682 JavaThread* THREAD = JavaThread::thread_from_jni_environment(env);
3683 THREAD->statistical_info().incrBytesWrittenToNetwork(nr_of_written_bytes);
3684 }