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