1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc/shared/barrierSet.inline.hpp"
33 #include "gc/shared/collectedHeap.inline.hpp"
34 #include "interpreter/bytecode.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/method.hpp"
40 #include "oops/objArrayKlass.hpp"
41 #include "oops/objArrayOop.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/jvm.h"
44 #include "prims/jvm_misc.hpp"
45 #include "prims/jvmtiExport.hpp"
46 #include "prims/jvmtiThreadState.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "prims/privilegedStack.hpp"
49 #include "prims/stackwalk.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/atomic.inline.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/jfieldIDWorkaround.hpp"
58 #include "runtime/orderAccess.inline.hpp"
59 #include "runtime/os.inline.hpp"
60 #include "runtime/perfData.hpp"
61 #include "runtime/reflection.hpp"
62 #include "runtime/thread.inline.hpp"
63 #include "runtime/vframe.hpp"
64 #include "runtime/vm_operations.hpp"
65 #include "runtime/vm_version.hpp"
66 #include "services/attachListener.hpp"
67 #include "services/management.hpp"
68 #include "services/threadService.hpp"
69 #include "trace/tracing.hpp"
70 #include "utilities/copy.hpp"
71 #include "utilities/defaultStream.hpp"
72 #include "utilities/dtrace.hpp"
73 #include "utilities/events.hpp"
74 #include "utilities/histogram.hpp"
75 #include "utilities/macros.hpp"
76 #include "utilities/top.hpp"
77 #include "utilities/utf8.hpp"
78 #if INCLUDE_CDS
79 #include "classfile/sharedClassUtil.hpp"
80 #include "classfile/systemDictionaryShared.hpp"
81 #endif
82 #ifdef TARGET_OS_FAMILY_linux
83 # include "jvm_linux.h"
84 #endif
85 #ifdef TARGET_OS_FAMILY_solaris
86 # include "jvm_solaris.h"
87 #endif
88 #ifdef TARGET_OS_FAMILY_windows
89 # include "jvm_windows.h"
90 #endif
91 #ifdef TARGET_OS_FAMILY_aix
92 # include "jvm_aix.h"
93 #endif
94 #ifdef TARGET_OS_FAMILY_bsd
95 # include "jvm_bsd.h"
96 #endif
97
98 #include <errno.h>
99
100 /*
101 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
102 such ctors and calls MUST NOT come between an oop declaration/init and its
103 usage because if objects are move this may cause various memory stomps, bus
104 errors and segfaults. Here is a cookbook for causing so called "naked oop
105 failures":
106
107 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
108 JVMWrapper("JVM_GetClassDeclaredFields");
109
110 // Object address to be held directly in mirror & not visible to GC
111 oop mirror = JNIHandles::resolve_non_null(ofClass);
112
113 // If this ctor can hit a safepoint, moving objects around, then
114 ComplexConstructor foo;
115
116 // Boom! mirror may point to JUNK instead of the intended object
117 (some dereference of mirror)
118
119 // Here's another call that may block for GC, making mirror stale
120 MutexLocker ml(some_lock);
121
122 // And here's an initializer that can result in a stale oop
123 // all in one step.
124 oop o = call_that_can_throw_exception(TRAPS);
125
126
127 The solution is to keep the oop declaration BELOW the ctor or function
128 call that might cause a GC, do another resolve to reassign the oop, or
129 consider use of a Handle instead of an oop so there is immunity from object
130 motion. But note that the "QUICK" entries below do not have a handlemark
131 and thus can only support use of handles passed in.
132 */
133
134 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
135 ResourceMark rm;
136 int line_number = -1;
137 const char * source_file = NULL;
138 const char * trace = "explicit";
139 InstanceKlass* caller = NULL;
140 JavaThread* jthread = JavaThread::current();
141 if (jthread->has_last_Java_frame()) {
142 vframeStream vfst(jthread);
143
144 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
145 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
146 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
147 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
148 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
149
150 Method* last_caller = NULL;
151
152 while (!vfst.at_end()) {
153 Method* m = vfst.method();
154 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
155 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
156 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
157 break;
158 }
159 last_caller = m;
160 vfst.next();
161 }
162 // if this is called from Class.forName0 and that is called from Class.forName,
163 // then print the caller of Class.forName. If this is Class.loadClass, then print
164 // that caller, otherwise keep quiet since this should be picked up elsewhere.
165 bool found_it = false;
166 if (!vfst.at_end() &&
167 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
168 vfst.method()->name() == vmSymbols::forName0_name()) {
169 vfst.next();
170 if (!vfst.at_end() &&
171 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
172 vfst.method()->name() == vmSymbols::forName_name()) {
173 vfst.next();
174 found_it = true;
175 }
176 } else if (last_caller != NULL &&
177 last_caller->method_holder()->name() ==
178 vmSymbols::java_lang_ClassLoader() &&
179 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
180 last_caller->name() == vmSymbols::loadClass_name())) {
181 found_it = true;
182 } else if (!vfst.at_end()) {
183 if (vfst.method()->is_native()) {
184 // JNI call
185 found_it = true;
186 }
187 }
188 if (found_it && !vfst.at_end()) {
189 // found the caller
190 caller = vfst.method()->method_holder();
191 line_number = vfst.method()->line_number_from_bci(vfst.bci());
192 if (line_number == -1) {
193 // show method name if it's a native method
194 trace = vfst.method()->name_and_sig_as_C_string();
195 }
196 Symbol* s = caller->source_file_name();
197 if (s != NULL) {
198 source_file = s->as_C_string();
199 }
200 }
201 }
202 if (caller != NULL) {
203 if (to_class != caller) {
204 const char * from = caller->external_name();
205 const char * to = to_class->external_name();
206 // print in a single call to reduce interleaving between threads
207 if (source_file != NULL) {
208 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
209 } else {
210 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
211 }
212 }
213 }
214 }
215
216 void trace_class_resolution(Klass* to_class) {
217 EXCEPTION_MARK;
218 trace_class_resolution_impl(to_class, THREAD);
219 if (HAS_PENDING_EXCEPTION) {
220 CLEAR_PENDING_EXCEPTION;
221 }
222 }
223
224 // Wrapper to trace JVM functions
225
226 #ifdef ASSERT
227 class JVMTraceWrapper : public StackObj {
228 public:
229 JVMTraceWrapper(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) {
230 if (TraceJVMCalls) {
231 va_list ap;
232 va_start(ap, format);
233 tty->print("JVM ");
234 tty->vprint_cr(format, ap);
235 va_end(ap);
236 }
237 }
238 };
239
240 Histogram* JVMHistogram;
241 volatile jint JVMHistogram_lock = 0;
242
243 class JVMHistogramElement : public HistogramElement {
244 public:
245 JVMHistogramElement(const char* name);
246 };
247
248 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
249 _name = elementName;
250 uintx count = 0;
251
252 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
253 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
254 count +=1;
255 if ( (WarnOnStalledSpinLock > 0)
256 && (count % WarnOnStalledSpinLock == 0)) {
257 warning("JVMHistogram_lock seems to be stalled");
258 }
259 }
260 }
261
262 if(JVMHistogram == NULL)
263 JVMHistogram = new Histogram("JVM Call Counts",100);
264
265 JVMHistogram->add_element(this);
266 Atomic::dec(&JVMHistogram_lock);
267 }
268
269 #define JVMCountWrapper(arg) \
270 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
271 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
272
273 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
274 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
275 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
276 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
277 #else
278 #define JVMWrapper(arg1)
279 #define JVMWrapper2(arg1, arg2)
280 #define JVMWrapper3(arg1, arg2, arg3)
281 #define JVMWrapper4(arg1, arg2, arg3, arg4)
282 #endif
283
284
285 // Interface version /////////////////////////////////////////////////////////////////////
286
287
288 JVM_LEAF(jint, JVM_GetInterfaceVersion())
289 return JVM_INTERFACE_VERSION;
290 JVM_END
291
292
293 // java.lang.System //////////////////////////////////////////////////////////////////////
294
295
296 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
297 JVMWrapper("JVM_CurrentTimeMillis");
298 return os::javaTimeMillis();
299 JVM_END
300
301 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
302 JVMWrapper("JVM_NanoTime");
303 return os::javaTimeNanos();
304 JVM_END
305
306 // The function below is actually exposed by sun.misc.VM and not
307 // java.lang.System, but we choose to keep it here so that it stays next
308 // to JVM_CurrentTimeMillis and JVM_NanoTime
309
310 const jlong MAX_DIFF_SECS = CONST64(0x0100000000); // 2^32
311 const jlong MIN_DIFF_SECS = -MAX_DIFF_SECS; // -2^32
312
313 JVM_LEAF(jlong, JVM_GetNanoTimeAdjustment(JNIEnv *env, jclass ignored, jlong offset_secs))
314 JVMWrapper("JVM_GetNanoTimeAdjustment");
315 jlong seconds;
316 jlong nanos;
317
318 os::javaTimeSystemUTC(seconds, nanos);
319
320 // We're going to verify that the result can fit in a long.
321 // For that we need the difference in seconds between 'seconds'
322 // and 'offset_secs' to be such that:
323 // |seconds - offset_secs| < (2^63/10^9)
324 // We're going to approximate 10^9 ~< 2^30 (1000^3 ~< 1024^3)
325 // which makes |seconds - offset_secs| < 2^33
326 // and we will prefer +/- 2^32 as the maximum acceptable diff
327 // as 2^32 has a more natural feel than 2^33...
328 //
329 // So if |seconds - offset_secs| >= 2^32 - we return a special
330 // sentinel value (-1) which the caller should take as an
331 // exception value indicating that the offset given to us is
332 // too far from range of the current time - leading to too big
333 // a nano adjustment. The caller is expected to recover by
334 // computing a more accurate offset and calling this method
335 // again. (For the record 2^32 secs is ~136 years, so that
336 // should rarely happen)
337 //
338 jlong diff = seconds - offset_secs;
339 if (diff >= MAX_DIFF_SECS || diff <= MIN_DIFF_SECS) {
340 return -1; // sentinel value: the offset is too far off the target
341 }
342
343 // return the adjustment. If you compute a time by adding
344 // this number of nanoseconds along with the number of seconds
345 // in the offset you should get the current UTC time.
346 return (diff * (jlong)1000000000) + nanos;
347 JVM_END
348
349 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
350 jobject dst, jint dst_pos, jint length))
351 JVMWrapper("JVM_ArrayCopy");
352 // Check if we have null pointers
353 if (src == NULL || dst == NULL) {
354 THROW(vmSymbols::java_lang_NullPointerException());
355 }
356 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
357 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
358 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
359 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
360 // Do copy
361 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
362 JVM_END
363
364
365 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
366 JavaValue r(T_OBJECT);
367 // public synchronized Object put(Object key, Object value);
368 HandleMark hm(THREAD);
369 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
370 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
371 JavaCalls::call_virtual(&r,
372 props,
373 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
374 vmSymbols::put_name(),
375 vmSymbols::object_object_object_signature(),
376 key_str,
377 value_str,
378 THREAD);
379 }
380
381
382 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
383
384
385 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
386 JVMWrapper("JVM_InitProperties");
387 ResourceMark rm;
388
389 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
390
391 // System property list includes both user set via -D option and
392 // jvm system specific properties.
393 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
394 PUTPROP(props, p->key(), p->value());
395 }
396
397 // Convert the -XX:MaxDirectMemorySize= command line flag
398 // to the sun.nio.MaxDirectMemorySize property.
399 // Do this after setting user properties to prevent people
400 // from setting the value with a -D option, as requested.
401 {
402 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
403 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
404 } else {
405 char as_chars[256];
406 jio_snprintf(as_chars, sizeof(as_chars), SIZE_FORMAT, MaxDirectMemorySize);
407 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
408 }
409 }
410
411 // JVM monitoring and management support
412 // Add the sun.management.compiler property for the compiler's name
413 {
414 #undef CSIZE
415 #if defined(_LP64) || defined(_WIN64)
416 #define CSIZE "64-Bit "
417 #else
418 #define CSIZE
419 #endif // 64bit
420
421 #ifdef TIERED
422 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
423 #else
424 #if defined(COMPILER1)
425 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
426 #elif defined(COMPILER2)
427 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
428 #elif INCLUDE_JVMCI
429 #error "INCLUDE_JVMCI should imply TIERED"
430 #else
431 const char* compiler_name = "";
432 #endif // compilers
433 #endif // TIERED
434
435 if (*compiler_name != '\0' &&
436 (Arguments::mode() != Arguments::_int)) {
437 PUTPROP(props, "sun.management.compiler", compiler_name);
438 }
439 }
440
441 return properties;
442 JVM_END
443
444
445 /*
446 * Return the temporary directory that the VM uses for the attach
447 * and perf data files.
448 *
449 * It is important that this directory is well-known and the
450 * same for all VM instances. It cannot be affected by configuration
451 * variables such as java.io.tmpdir.
452 */
453 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
454 JVMWrapper("JVM_GetTemporaryDirectory");
455 HandleMark hm(THREAD);
456 const char* temp_dir = os::get_temp_directory();
457 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
458 return (jstring) JNIHandles::make_local(env, h());
459 JVM_END
460
461
462 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
463
464 extern volatile jint vm_created;
465
466 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
467 before_exit(thread);
468 vm_exit(code);
469 JVM_END
470
471
472 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
473 JVMWrapper("JVM_GC");
474 if (!DisableExplicitGC) {
475 Universe::heap()->collect(GCCause::_java_lang_system_gc);
476 }
477 JVM_END
478
479
480 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
481 JVMWrapper("JVM_MaxObjectInspectionAge");
482 return Universe::heap()->millis_since_last_gc();
483 JVM_END
484
485
486 static inline jlong convert_size_t_to_jlong(size_t val) {
487 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
488 NOT_LP64 (return (jlong)val;)
489 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
490 }
491
492 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
493 JVMWrapper("JVM_TotalMemory");
494 size_t n = Universe::heap()->capacity();
495 return convert_size_t_to_jlong(n);
496 JVM_END
497
498
499 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
500 JVMWrapper("JVM_FreeMemory");
501 CollectedHeap* ch = Universe::heap();
502 size_t n;
503 {
504 MutexLocker x(Heap_lock);
505 n = ch->capacity() - ch->used();
506 }
507 return convert_size_t_to_jlong(n);
508 JVM_END
509
510
511 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
512 JVMWrapper("JVM_MaxMemory");
513 size_t n = Universe::heap()->max_capacity();
514 return convert_size_t_to_jlong(n);
515 JVM_END
516
517
518 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
519 JVMWrapper("JVM_ActiveProcessorCount");
520 return os::active_processor_count();
521 JVM_END
522
523
524
525 // java.lang.Throwable //////////////////////////////////////////////////////
526
527
528 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
529 JVMWrapper("JVM_FillInStackTrace");
530 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
531 java_lang_Throwable::fill_in_stack_trace(exception);
532 JVM_END
533
534
535 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
536 JVMWrapper("JVM_GetStackTraceDepth");
537 oop exception = JNIHandles::resolve(throwable);
538 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
539 JVM_END
540
541
542 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
543 JVMWrapper("JVM_GetStackTraceElement");
544 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
545 oop exception = JNIHandles::resolve(throwable);
546 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
547 return JNIHandles::make_local(env, element);
548 JVM_END
549
550
551 // java.lang.StackWalker //////////////////////////////////////////////////////
552
553
554 JVM_ENTRY(jobject, JVM_CallStackWalk(JNIEnv *env, jobject stackStream, jlong mode,
555 jint skip_frames, jint frame_count, jint start_index,
556 jobjectArray classes,
557 jobjectArray frames))
558 JVMWrapper("JVM_CallStackWalk");
559 JavaThread* jt = (JavaThread*) THREAD;
560 if (!jt->is_Java_thread() || !jt->has_last_Java_frame()) {
561 THROW_MSG_(vmSymbols::java_lang_InternalError(), "doStackWalk: no stack trace", NULL);
562 }
563
564 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
565 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(classes));
566 objArrayHandle classes_array_h(THREAD, ca);
567
568 // frames array is null when only getting caller reference
569 objArrayOop fa = objArrayOop(JNIHandles::resolve(frames));
570 objArrayHandle frames_array_h(THREAD, fa);
571
572 int limit = start_index+frame_count;
573 if (classes_array_h->length() < limit) {
574 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers", NULL);
575 }
576
577 Handle result = StackWalk::walk(stackStream_h, mode, skip_frames, frame_count,
578 start_index, classes_array_h,
579 frames_array_h, CHECK_NULL);
580 return JNIHandles::make_local(env, result());
581 JVM_END
582
583
584 JVM_ENTRY(jint, JVM_MoreStackWalk(JNIEnv *env, jobject stackStream, jlong mode, jlong anchor,
585 jint frame_count, jint start_index,
586 jobjectArray classes,
587 jobjectArray frames))
588 JVMWrapper("JVM_MoreStackWalk");
589 JavaThread* jt = (JavaThread*) THREAD;
590 objArrayOop ca = objArrayOop(JNIHandles::resolve_non_null(classes));
591 objArrayHandle classes_array_h(THREAD, ca);
592
593 // frames array is null when only getting caller reference
594 objArrayOop fa = objArrayOop(JNIHandles::resolve(frames));
595 objArrayHandle frames_array_h(THREAD, fa);
596
597 int limit = start_index+frame_count;
598 if (classes_array_h->length() < limit) {
599 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "not enough space in buffers");
600 }
601
602 Handle stackStream_h(THREAD, JNIHandles::resolve_non_null(stackStream));
603 return StackWalk::moreFrames(stackStream_h, mode, anchor, frame_count,
604 start_index, classes_array_h,
605 frames_array_h, CHECK_0);
606 JVM_END
607
608 JVM_ENTRY(void, JVM_FillStackFrames(JNIEnv *env, jclass stackStream,
609 jint start_index,
610 jobjectArray frames,
611 jint from_index, jint to_index))
612 JVMWrapper("JVM_FillStackFrames");
613 if (TraceStackWalk) {
614 tty->print("JVM_FillStackFrames() start_index=%d from_index=%d to_index=%d\n",
615 start_index, from_index, to_index);
616 }
617
618 JavaThread* jt = (JavaThread*) THREAD;
619
620 objArrayOop fa = objArrayOop(JNIHandles::resolve_non_null(frames));
621 objArrayHandle frames_array_h(THREAD, fa);
622
623 if (frames_array_h->length() < to_index) {
624 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "array length not matched");
625 }
626
627 for (int i=from_index; i < to_index; i++) {
628 Handle stackFrame(THREAD, frames_array_h->obj_at(i));
629 java_lang_StackFrameInfo::fill_methodInfo(stackFrame, CHECK);
630 }
631 JVM_END
632
633 JVM_ENTRY(void, JVM_SetMethodInfo(JNIEnv *env, jobject frame))
634 JVMWrapper("JVM_SetMethodInfo");
635 Handle stackFrame(THREAD, JNIHandles::resolve(frame));
636 java_lang_StackFrameInfo::fill_methodInfo(stackFrame, CHECK);
637 JVM_END
638
639 // java.lang.Object ///////////////////////////////////////////////
640
641
642 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
643 JVMWrapper("JVM_IHashCode");
644 // as implemented in the classic virtual machine; return 0 if object is NULL
645 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
646 JVM_END
647
648
649 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
650 JVMWrapper("JVM_MonitorWait");
651 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
652 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
653 if (JvmtiExport::should_post_monitor_wait()) {
654 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
655
656 // The current thread already owns the monitor and it has not yet
657 // been added to the wait queue so the current thread cannot be
658 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
659 // event handler cannot accidentally consume an unpark() meant for
660 // the ParkEvent associated with this ObjectMonitor.
661 }
662 ObjectSynchronizer::wait(obj, ms, CHECK);
663 JVM_END
664
665
666 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
667 JVMWrapper("JVM_MonitorNotify");
668 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
669 ObjectSynchronizer::notify(obj, CHECK);
670 JVM_END
671
672
673 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
674 JVMWrapper("JVM_MonitorNotifyAll");
675 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
676 ObjectSynchronizer::notifyall(obj, CHECK);
677 JVM_END
678
679
680 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
681 JVMWrapper("JVM_Clone");
682 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
683 const KlassHandle klass (THREAD, obj->klass());
684 JvmtiVMObjectAllocEventCollector oam;
685
686 #ifdef ASSERT
687 // Just checking that the cloneable flag is set correct
688 if (obj->is_array()) {
689 guarantee(klass->is_cloneable(), "all arrays are cloneable");
690 } else {
691 guarantee(obj->is_instance(), "should be instanceOop");
692 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
693 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
694 }
695 #endif
696
697 // Check if class of obj supports the Cloneable interface.
698 // All arrays are considered to be cloneable (See JLS 20.1.5)
699 if (!klass->is_cloneable()) {
700 ResourceMark rm(THREAD);
701 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
702 }
703
704 // Make shallow object copy
705 const int size = obj->size();
706 oop new_obj_oop = NULL;
707 if (obj->is_array()) {
708 const int length = ((arrayOop)obj())->length();
709 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
710 } else {
711 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
712 }
713
714 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
715 // is modifying a reference field in the clonee, a non-oop-atomic copy might
716 // be suspended in the middle of copying the pointer and end up with parts
717 // of two different pointers in the field. Subsequent dereferences will crash.
718 // 4846409: an oop-copy of objects with long or double fields or arrays of same
719 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
720 // of oops. We know objects are aligned on a minimum of an jlong boundary.
721 // The same is true of StubRoutines::object_copy and the various oop_copy
722 // variants, and of the code generated by the inline_native_clone intrinsic.
723 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
724 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
725 (size_t)align_object_size(size) / HeapWordsPerLong);
726 // Clear the header
727 new_obj_oop->init_mark();
728
729 // Store check (mark entire object and let gc sort it out)
730 BarrierSet* bs = Universe::heap()->barrier_set();
731 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
732 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
733
734 Handle new_obj(THREAD, new_obj_oop);
735 // Special handling for MemberNames. Since they contain Method* metadata, they
736 // must be registered so that RedefineClasses can fix metadata contained in them.
737 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
738 java_lang_invoke_MemberName::is_method(new_obj())) {
739 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
740 // MemberName may be unresolved, so doesn't need registration until resolved.
741 if (method != NULL) {
742 methodHandle m(THREAD, method);
743 // This can safepoint and redefine method, so need both new_obj and method
744 // in a handle, for two different reasons. new_obj can move, method can be
745 // deleted if nothing is using it on the stack.
746 m->method_holder()->add_member_name(new_obj());
747 }
748 }
749
750 // Caution: this involves a java upcall, so the clone should be
751 // "gc-robust" by this stage.
752 if (klass->has_finalizer()) {
753 assert(obj->is_instance(), "should be instanceOop");
754 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
755 new_obj = Handle(THREAD, new_obj_oop);
756 }
757
758 return JNIHandles::make_local(env, new_obj());
759 JVM_END
760
761 // java.io.File ///////////////////////////////////////////////////////////////
762
763 JVM_LEAF(char*, JVM_NativePath(char* path))
764 JVMWrapper2("JVM_NativePath (%s)", path);
765 return os::native_path(path);
766 JVM_END
767
768
769 // Misc. class handling ///////////////////////////////////////////////////////////
770
771
772 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
773 JVMWrapper("JVM_GetCallerClass");
774
775 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
776 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
777 // temporarily for existing code to use until a replacement API is defined.
778 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
779 Klass* k = thread->security_get_caller_class(depth);
780 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
781 }
782
783 // Getting the class of the caller frame.
784 //
785 // The call stack at this point looks something like this:
786 //
787 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
788 // [1] [ @CallerSensitive API.method ]
789 // [.] [ (skipped intermediate frames) ]
790 // [n] [ caller ]
791 vframeStream vfst(thread);
792 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
793 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
794 Method* m = vfst.method();
795 assert(m != NULL, "sanity");
796 switch (n) {
797 case 0:
798 // This must only be called from Reflection.getCallerClass
799 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
800 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
801 }
802 // fall-through
803 case 1:
804 // Frame 0 and 1 must be caller sensitive.
805 if (!m->caller_sensitive()) {
806 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
807 }
808 break;
809 default:
810 if (!m->is_ignored_by_security_stack_walk()) {
811 // We have reached the desired frame; return the holder class.
812 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
813 }
814 break;
815 }
816 }
817 return NULL;
818 JVM_END
819
820
821 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
822 JVMWrapper("JVM_FindPrimitiveClass");
823 oop mirror = NULL;
824 BasicType t = name2type(utf);
825 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
826 mirror = Universe::java_mirror(t);
827 }
828 if (mirror == NULL) {
829 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
830 } else {
831 return (jclass) JNIHandles::make_local(env, mirror);
832 }
833 JVM_END
834
835
836 // Returns a class loaded by the bootstrap class loader; or null
837 // if not found. ClassNotFoundException is not thrown.
838 // FindClassFromBootLoader is exported to the launcher for windows.
839 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
840 const char* name))
841 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
842
843 // Java libraries should ensure that name is never null...
844 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
845 // It's impossible to create this class; the name cannot fit
846 // into the constant pool.
847 return NULL;
848 }
849
850 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
851 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
852 if (k == NULL) {
853 return NULL;
854 }
855
856 if (TraceClassResolution) {
857 trace_class_resolution(k);
858 }
859 return (jclass) JNIHandles::make_local(env, k->java_mirror());
860 JVM_END
861
862 // Find a class with this name in this loader, using the caller's protection domain.
863 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
864 jboolean init, jobject loader,
865 jclass caller))
866 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
867 // Java libraries should ensure that name is never null...
868 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
869 // It's impossible to create this class; the name cannot fit
870 // into the constant pool.
871 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
872 }
873
874 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
875
876 oop loader_oop = JNIHandles::resolve(loader);
877 oop from_class = JNIHandles::resolve(caller);
878 oop protection_domain = NULL;
879 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
880 // NPE. Put it in another way, the bootstrap class loader has all permission and
881 // thus no checkPackageAccess equivalence in the VM class loader.
882 // The caller is also passed as NULL by the java code if there is no security
883 // manager to avoid the performance cost of getting the calling class.
884 if (from_class != NULL && loader_oop != NULL) {
885 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
886 }
887
888 Handle h_loader(THREAD, loader_oop);
889 Handle h_prot(THREAD, protection_domain);
890 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
891 h_prot, false, THREAD);
892
893 if (TraceClassResolution && result != NULL) {
894 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
895 }
896 return result;
897 JVM_END
898
899 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
900 jboolean init, jclass from))
901 JVMWrapper2("JVM_FindClassFromClass %s", name);
902 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
903 // It's impossible to create this class; the name cannot fit
904 // into the constant pool.
905 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
906 }
907 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
908 oop from_class_oop = JNIHandles::resolve(from);
909 Klass* from_class = (from_class_oop == NULL)
910 ? (Klass*)NULL
911 : java_lang_Class::as_Klass(from_class_oop);
912 oop class_loader = NULL;
913 oop protection_domain = NULL;
914 if (from_class != NULL) {
915 class_loader = from_class->class_loader();
916 protection_domain = from_class->protection_domain();
917 }
918 Handle h_loader(THREAD, class_loader);
919 Handle h_prot (THREAD, protection_domain);
920 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
921 h_prot, true, thread);
922
923 if (TraceClassResolution && result != NULL) {
924 // this function is generally only used for class loading during verification.
925 ResourceMark rm;
926 oop from_mirror = JNIHandles::resolve_non_null(from);
927 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
928 const char * from_name = from_class->external_name();
929
930 oop mirror = JNIHandles::resolve_non_null(result);
931 Klass* to_class = java_lang_Class::as_Klass(mirror);
932 const char * to = to_class->external_name();
933 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
934 }
935
936 return result;
937 JVM_END
938
939 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
940 if (loader.is_null()) {
941 return;
942 }
943
944 // check whether the current caller thread holds the lock or not.
945 // If not, increment the corresponding counter
946 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
947 ObjectSynchronizer::owner_self) {
948 counter->inc();
949 }
950 }
951
952 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
953 // and JVM_DefineClassWithSourceCond()
954 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
955 jobject loader, const jbyte *buf,
956 jsize len, jobject pd, const char *source,
957 jboolean verify, TRAPS) {
958 if (source == NULL) source = "__JVM_DefineClass__";
959
960 assert(THREAD->is_Java_thread(), "must be a JavaThread");
961 JavaThread* jt = (JavaThread*) THREAD;
962
963 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
964 ClassLoader::perf_define_appclass_selftime(),
965 ClassLoader::perf_define_appclasses(),
966 jt->get_thread_stat()->perf_recursion_counts_addr(),
967 jt->get_thread_stat()->perf_timers_addr(),
968 PerfClassTraceTime::DEFINE_CLASS);
969
970 if (UsePerfData) {
971 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
972 }
973
974 // Since exceptions can be thrown, class initialization can take place
975 // if name is NULL no check for class name in .class stream has to be made.
976 TempNewSymbol class_name = NULL;
977 if (name != NULL) {
978 const int str_len = (int)strlen(name);
979 if (str_len > Symbol::max_length()) {
980 // It's impossible to create this class; the name cannot fit
981 // into the constant pool.
982 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
983 }
984 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
985 }
986
987 ResourceMark rm(THREAD);
988 ClassFileStream st((u1*) buf, len, (char *)source);
989 Handle class_loader (THREAD, JNIHandles::resolve(loader));
990 if (UsePerfData) {
991 is_lock_held_by_thread(class_loader,
992 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
993 THREAD);
994 }
995 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
996 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
997 protection_domain, &st,
998 verify != 0,
999 CHECK_NULL);
1000
1001 if (TraceClassResolution && k != NULL) {
1002 trace_class_resolution(k);
1003 }
1004
1005 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1006 }
1007
1008
1009 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1010 JVMWrapper2("JVM_DefineClass %s", name);
1011
1012 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1013 JVM_END
1014
1015
1016 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1017 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1018
1019 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1020 JVM_END
1021
1022 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1023 jobject loader, const jbyte *buf,
1024 jsize len, jobject pd,
1025 const char *source, jboolean verify))
1026 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1027
1028 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1029 JVM_END
1030
1031 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1032 JVMWrapper("JVM_FindLoadedClass");
1033 ResourceMark rm(THREAD);
1034
1035 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1036 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1037
1038 const char* str = java_lang_String::as_utf8_string(string());
1039 // Sanity check, don't expect null
1040 if (str == NULL) return NULL;
1041
1042 const int str_len = (int)strlen(str);
1043 if (str_len > Symbol::max_length()) {
1044 // It's impossible to create this class; the name cannot fit
1045 // into the constant pool.
1046 return NULL;
1047 }
1048 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1049
1050 // Security Note:
1051 // The Java level wrapper will perform the necessary security check allowing
1052 // us to pass the NULL as the initiating class loader.
1053 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1054 if (UsePerfData) {
1055 is_lock_held_by_thread(h_loader,
1056 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1057 THREAD);
1058 }
1059
1060 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1061 h_loader,
1062 Handle(),
1063 CHECK_NULL);
1064 #if INCLUDE_CDS
1065 if (k == NULL) {
1066 // If the class is not already loaded, try to see if it's in the shared
1067 // archive for the current classloader (h_loader).
1068 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1069 klass_name, h_loader, CHECK_NULL);
1070 k = ik();
1071 }
1072 #endif
1073 return (k == NULL) ? NULL :
1074 (jclass) JNIHandles::make_local(env, k->java_mirror());
1075 JVM_END
1076
1077
1078 // Reflection support //////////////////////////////////////////////////////////////////////////////
1079
1080 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1081 assert (cls != NULL, "illegal class");
1082 JVMWrapper("JVM_GetClassName");
1083 JvmtiVMObjectAllocEventCollector oam;
1084 ResourceMark rm(THREAD);
1085 const char* name;
1086 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1087 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1088 } else {
1089 // Consider caching interned string in Klass
1090 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1091 assert(k->is_klass(), "just checking");
1092 name = k->external_name();
1093 }
1094 oop result = StringTable::intern((char*) name, CHECK_NULL);
1095 return (jstring) JNIHandles::make_local(env, result);
1096 JVM_END
1097
1098
1099 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1100 JVMWrapper("JVM_GetClassInterfaces");
1101 JvmtiVMObjectAllocEventCollector oam;
1102 oop mirror = JNIHandles::resolve_non_null(cls);
1103
1104 // Special handling for primitive objects
1105 if (java_lang_Class::is_primitive(mirror)) {
1106 // Primitive objects does not have any interfaces
1107 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1108 return (jobjectArray) JNIHandles::make_local(env, r);
1109 }
1110
1111 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1112 // Figure size of result array
1113 int size;
1114 if (klass->oop_is_instance()) {
1115 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1116 } else {
1117 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "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->oop_is_instance()) {
1126 // Regular instance klass, fill in all local interfaces
1127 for (int index = 0; index < size; index++) {
1128 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1129 result->obj_at_put(index, k->java_mirror());
1130 }
1131 } else {
1132 // All arrays implement java.lang.Cloneable and java.io.Serializable
1133 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1134 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1135 }
1136 return (jobjectArray) JNIHandles::make_local(env, result());
1137 JVM_END
1138
1139
1140 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1141 JVMWrapper("JVM_IsInterface");
1142 oop mirror = JNIHandles::resolve_non_null(cls);
1143 if (java_lang_Class::is_primitive(mirror)) {
1144 return JNI_FALSE;
1145 }
1146 Klass* k = java_lang_Class::as_Klass(mirror);
1147 jboolean result = k->is_interface();
1148 assert(!result || k->oop_is_instance(),
1149 "all interfaces are instance types");
1150 // The compiler intrinsic for isInterface tests the
1151 // Klass::_access_flags bits in the same way.
1152 return result;
1153 JVM_END
1154
1155
1156 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1157 JVMWrapper("JVM_GetClassSigners");
1158 JvmtiVMObjectAllocEventCollector oam;
1159 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1160 // There are no signers for primitive types
1161 return NULL;
1162 }
1163
1164 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1165
1166 // If there are no signers set in the class, or if the class
1167 // is an array, return NULL.
1168 if (signers == NULL) return NULL;
1169
1170 // copy of the signers array
1171 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1172 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1173 for (int index = 0; index < signers->length(); index++) {
1174 signers_copy->obj_at_put(index, signers->obj_at(index));
1175 }
1176
1177 // return the copy
1178 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1179 JVM_END
1180
1181
1182 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1183 JVMWrapper("JVM_SetClassSigners");
1184 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1185 // This call is ignored for primitive types and arrays.
1186 // Signers are only set once, ClassLoader.java, and thus shouldn't
1187 // be called with an array. Only the bootstrap loader creates arrays.
1188 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1189 if (k->oop_is_instance()) {
1190 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1191 }
1192 }
1193 JVM_END
1194
1195
1196 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1197 JVMWrapper("JVM_GetProtectionDomain");
1198 if (JNIHandles::resolve(cls) == NULL) {
1199 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1200 }
1201
1202 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1203 // Primitive types does not have a protection domain.
1204 return NULL;
1205 }
1206
1207 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1208 return (jobject) JNIHandles::make_local(env, pd);
1209 JVM_END
1210
1211
1212 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1213 // If there is a security manager and protection domain, check the access
1214 // in the protection domain, otherwise it is authorized.
1215 if (java_lang_System::has_security_manager()) {
1216
1217 // For bootstrapping, if pd implies method isn't in the JDK, allow
1218 // this context to revert to older behavior.
1219 // In this case the isAuthorized field in AccessControlContext is also not
1220 // present.
1221 if (Universe::protection_domain_implies_method() == NULL) {
1222 return true;
1223 }
1224
1225 // Whitelist certain access control contexts
1226 if (java_security_AccessControlContext::is_authorized(context)) {
1227 return true;
1228 }
1229
1230 oop prot = klass->protection_domain();
1231 if (prot != NULL) {
1232 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1233 // in the new wrapper.
1234 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1235 Handle h_prot(THREAD, prot);
1236 JavaValue result(T_BOOLEAN);
1237 JavaCallArguments args(h_prot);
1238 JavaCalls::call(&result, m, &args, CHECK_false);
1239 return (result.get_jboolean() != 0);
1240 }
1241 }
1242 return true;
1243 }
1244
1245 // Create an AccessControlContext with a protection domain with null codesource
1246 // and null permissions - which gives no permissions.
1247 oop create_dummy_access_control_context(TRAPS) {
1248 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1249 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1250 // Call constructor ProtectionDomain(null, null);
1251 JavaValue result(T_VOID);
1252 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1253 vmSymbols::object_initializer_name(),
1254 vmSymbols::codesource_permissioncollection_signature(),
1255 Handle(), Handle(), CHECK_NULL);
1256
1257 // new ProtectionDomain[] {pd};
1258 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1259 context->obj_at_put(0, obj());
1260
1261 // new AccessControlContext(new ProtectionDomain[] {pd})
1262 objArrayHandle h_context(THREAD, context);
1263 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1264 return acc;
1265 }
1266
1267 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1268 JVMWrapper("JVM_DoPrivileged");
1269
1270 if (action == NULL) {
1271 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1272 }
1273
1274 // Compute the frame initiating the do privileged operation and setup the privileged stack
1275 vframeStream vfst(thread);
1276 vfst.security_get_caller_frame(1);
1277
1278 if (vfst.at_end()) {
1279 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1280 }
1281
1282 Method* method = vfst.method();
1283 instanceKlassHandle klass (THREAD, method->method_holder());
1284
1285 // Check that action object understands "Object run()"
1286 Handle h_context;
1287 if (context != NULL) {
1288 h_context = Handle(THREAD, JNIHandles::resolve(context));
1289 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1290 if (!authorized) {
1291 // Create an unprivileged access control object and call it's run function
1292 // instead.
1293 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1294 h_context = Handle(THREAD, noprivs);
1295 }
1296 }
1297
1298 // Check that action object understands "Object run()"
1299 Handle object (THREAD, JNIHandles::resolve(action));
1300
1301 // get run() method
1302 Method* m_oop = object->klass()->uncached_lookup_method(
1303 vmSymbols::run_method_name(),
1304 vmSymbols::void_object_signature(),
1305 Klass::find_overpass);
1306 methodHandle m (THREAD, m_oop);
1307 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1308 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1309 }
1310
1311 // Stack allocated list of privileged stack elements
1312 PrivilegedElement pi;
1313 if (!vfst.at_end()) {
1314 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1315 thread->set_privileged_stack_top(&pi);
1316 }
1317
1318
1319 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1320 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1321 Handle pending_exception;
1322 JavaValue result(T_OBJECT);
1323 JavaCallArguments args(object);
1324 JavaCalls::call(&result, m, &args, THREAD);
1325
1326 // done with action, remove ourselves from the list
1327 if (!vfst.at_end()) {
1328 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1329 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1330 }
1331
1332 if (HAS_PENDING_EXCEPTION) {
1333 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1334 CLEAR_PENDING_EXCEPTION;
1335 // JVMTI has already reported the pending exception
1336 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1337 if (THREAD->is_Java_thread()) {
1338 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1339 }
1340 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1341 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1342 // Throw a java.security.PrivilegedActionException(Exception e) exception
1343 JavaCallArguments args(pending_exception);
1344 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1345 vmSymbols::exception_void_signature(),
1346 &args);
1347 }
1348 }
1349
1350 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1351 return JNIHandles::make_local(env, (oop) result.get_jobject());
1352 JVM_END
1353
1354
1355 // Returns the inherited_access_control_context field of the running thread.
1356 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1357 JVMWrapper("JVM_GetInheritedAccessControlContext");
1358 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1359 return JNIHandles::make_local(env, result);
1360 JVM_END
1361
1362 class RegisterArrayForGC {
1363 private:
1364 JavaThread *_thread;
1365 public:
1366 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1367 _thread = thread;
1368 _thread->register_array_for_gc(array);
1369 }
1370
1371 ~RegisterArrayForGC() {
1372 _thread->register_array_for_gc(NULL);
1373 }
1374 };
1375
1376
1377 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1378 JVMWrapper("JVM_GetStackAccessControlContext");
1379 if (!UsePrivilegedStack) return NULL;
1380
1381 ResourceMark rm(THREAD);
1382 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1383 JvmtiVMObjectAllocEventCollector oam;
1384
1385 // count the protection domains on the execution stack. We collapse
1386 // duplicate consecutive protection domains into a single one, as
1387 // well as stopping when we hit a privileged frame.
1388
1389 // Use vframeStream to iterate through Java frames
1390 vframeStream vfst(thread);
1391
1392 oop previous_protection_domain = NULL;
1393 Handle privileged_context(thread, NULL);
1394 bool is_privileged = false;
1395 oop protection_domain = NULL;
1396
1397 for(; !vfst.at_end(); vfst.next()) {
1398 // get method of frame
1399 Method* method = vfst.method();
1400 intptr_t* frame_id = vfst.frame_id();
1401
1402 // check the privileged frames to see if we have a match
1403 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1404 // this frame is privileged
1405 is_privileged = true;
1406 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1407 protection_domain = thread->privileged_stack_top()->protection_domain();
1408 } else {
1409 protection_domain = method->method_holder()->protection_domain();
1410 }
1411
1412 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1413 local_array->push(protection_domain);
1414 previous_protection_domain = protection_domain;
1415 }
1416
1417 if (is_privileged) break;
1418 }
1419
1420
1421 // either all the domains on the stack were system domains, or
1422 // we had a privileged system domain
1423 if (local_array->is_empty()) {
1424 if (is_privileged && privileged_context.is_null()) return NULL;
1425
1426 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1427 return JNIHandles::make_local(env, result);
1428 }
1429
1430 // the resource area must be registered in case of a gc
1431 RegisterArrayForGC ragc(thread, local_array);
1432 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1433 local_array->length(), CHECK_NULL);
1434 objArrayHandle h_context(thread, context);
1435 for (int index = 0; index < local_array->length(); index++) {
1436 h_context->obj_at_put(index, local_array->at(index));
1437 }
1438
1439 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1440
1441 return JNIHandles::make_local(env, result);
1442 JVM_END
1443
1444
1445 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1446 JVMWrapper("JVM_IsArrayClass");
1447 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1448 return (k != NULL) && k->oop_is_array() ? true : false;
1449 JVM_END
1450
1451
1452 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1453 JVMWrapper("JVM_IsPrimitiveClass");
1454 oop mirror = JNIHandles::resolve_non_null(cls);
1455 return (jboolean) java_lang_Class::is_primitive(mirror);
1456 JVM_END
1457
1458
1459 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1460 JVMWrapper("JVM_GetClassModifiers");
1461 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1462 // Primitive type
1463 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1464 }
1465
1466 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1467 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1468 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1469 return k->modifier_flags();
1470 JVM_END
1471
1472
1473 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1474
1475 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1476 JvmtiVMObjectAllocEventCollector oam;
1477 // ofClass is a reference to a java_lang_Class object. The mirror object
1478 // of an InstanceKlass
1479
1480 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1481 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1482 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1483 return (jobjectArray)JNIHandles::make_local(env, result);
1484 }
1485
1486 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1487 InnerClassesIterator iter(k);
1488
1489 if (iter.length() == 0) {
1490 // Neither an inner nor outer class
1491 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1492 return (jobjectArray)JNIHandles::make_local(env, result);
1493 }
1494
1495 // find inner class info
1496 constantPoolHandle cp(thread, k->constants());
1497 int length = iter.length();
1498
1499 // Allocate temp. result array
1500 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1501 objArrayHandle result (THREAD, r);
1502 int members = 0;
1503
1504 for (; !iter.done(); iter.next()) {
1505 int ioff = iter.inner_class_info_index();
1506 int ooff = iter.outer_class_info_index();
1507
1508 if (ioff != 0 && ooff != 0) {
1509 // Check to see if the name matches the class we're looking for
1510 // before attempting to find the class.
1511 if (cp->klass_name_at_matches(k, ooff)) {
1512 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1513 if (outer_klass == k()) {
1514 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1515 instanceKlassHandle inner_klass (THREAD, ik);
1516
1517 // Throws an exception if outer klass has not declared k as
1518 // an inner klass
1519 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1520
1521 result->obj_at_put(members, inner_klass->java_mirror());
1522 members++;
1523 }
1524 }
1525 }
1526 }
1527
1528 if (members != length) {
1529 // Return array of right length
1530 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1531 for(int i = 0; i < members; i++) {
1532 res->obj_at_put(i, result->obj_at(i));
1533 }
1534 return (jobjectArray)JNIHandles::make_local(env, res);
1535 }
1536
1537 return (jobjectArray)JNIHandles::make_local(env, result());
1538 JVM_END
1539
1540
1541 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1542 {
1543 // ofClass is a reference to a java_lang_Class object.
1544 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1545 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1546 return NULL;
1547 }
1548
1549 bool inner_is_member = false;
1550 Klass* outer_klass
1551 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1552 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1553 if (outer_klass == NULL) return NULL; // already a top-level class
1554 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1555 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1556 }
1557 JVM_END
1558
1559 JVM_ENTRY(jstring, JVM_GetSimpleBinaryName(JNIEnv *env, jclass cls))
1560 {
1561 oop mirror = JNIHandles::resolve_non_null(cls);
1562 if (java_lang_Class::is_primitive(mirror) ||
1563 !java_lang_Class::as_Klass(mirror)->oop_is_instance()) {
1564 return NULL;
1565 }
1566 instanceKlassHandle k(THREAD, InstanceKlass::cast(java_lang_Class::as_Klass(mirror)));
1567 int ooff = 0, noff = 0;
1568 if (InstanceKlass::find_inner_classes_attr(k, &ooff, &noff, THREAD)) {
1569 if (noff != 0) {
1570 constantPoolHandle i_cp(thread, k->constants());
1571 Symbol* name = i_cp->symbol_at(noff);
1572 Handle str = java_lang_String::create_from_symbol(name, CHECK_NULL);
1573 return (jstring) JNIHandles::make_local(env, str());
1574 }
1575 }
1576 return NULL;
1577 }
1578 JVM_END
1579
1580 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1581 assert (cls != NULL, "illegal class");
1582 JVMWrapper("JVM_GetClassSignature");
1583 JvmtiVMObjectAllocEventCollector oam;
1584 ResourceMark rm(THREAD);
1585 // Return null for arrays and primatives
1586 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1587 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1588 if (k->oop_is_instance()) {
1589 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1590 if (sym == NULL) return NULL;
1591 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1592 return (jstring) JNIHandles::make_local(env, str());
1593 }
1594 }
1595 return NULL;
1596 JVM_END
1597
1598
1599 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1600 assert (cls != NULL, "illegal class");
1601 JVMWrapper("JVM_GetClassAnnotations");
1602
1603 // Return null for arrays and primitives
1604 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1605 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1606 if (k->oop_is_instance()) {
1607 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1608 return (jbyteArray) JNIHandles::make_local(env, a);
1609 }
1610 }
1611 return NULL;
1612 JVM_END
1613
1614
1615 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1616 // some of this code was adapted from from jni_FromReflectedField
1617
1618 oop reflected = JNIHandles::resolve_non_null(field);
1619 oop mirror = java_lang_reflect_Field::clazz(reflected);
1620 Klass* k = java_lang_Class::as_Klass(mirror);
1621 int slot = java_lang_reflect_Field::slot(reflected);
1622 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1623
1624 KlassHandle kh(THREAD, k);
1625 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1626
1627 if (modifiers & JVM_ACC_STATIC) {
1628 // for static fields we only look in the current class
1629 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1630 assert(false, "cannot find static field");
1631 return false;
1632 }
1633 } else {
1634 // for instance fields we start with the current class and work
1635 // our way up through the superclass chain
1636 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1637 assert(false, "cannot find instance field");
1638 return false;
1639 }
1640 }
1641 return true;
1642 }
1643
1644 static Method* jvm_get_method_common(jobject method) {
1645 // some of this code was adapted from from jni_FromReflectedMethod
1646
1647 oop reflected = JNIHandles::resolve_non_null(method);
1648 oop mirror = NULL;
1649 int slot = 0;
1650
1651 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1652 mirror = java_lang_reflect_Constructor::clazz(reflected);
1653 slot = java_lang_reflect_Constructor::slot(reflected);
1654 } else {
1655 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1656 "wrong type");
1657 mirror = java_lang_reflect_Method::clazz(reflected);
1658 slot = java_lang_reflect_Method::slot(reflected);
1659 }
1660 Klass* k = java_lang_Class::as_Klass(mirror);
1661
1662 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1663 assert(m != NULL, "cannot find method");
1664 return m; // caller has to deal with NULL in product mode
1665 }
1666
1667 /* Type use annotations support (JDK 1.8) */
1668
1669 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1670 assert (cls != NULL, "illegal class");
1671 JVMWrapper("JVM_GetClassTypeAnnotations");
1672 ResourceMark rm(THREAD);
1673 // Return null for arrays and primitives
1674 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1675 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1676 if (k->oop_is_instance()) {
1677 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1678 if (type_annotations != NULL) {
1679 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1680 return (jbyteArray) JNIHandles::make_local(env, a);
1681 }
1682 }
1683 }
1684 return NULL;
1685 JVM_END
1686
1687 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1688 assert (method != NULL, "illegal method");
1689 JVMWrapper("JVM_GetMethodTypeAnnotations");
1690
1691 // method is a handle to a java.lang.reflect.Method object
1692 Method* m = jvm_get_method_common(method);
1693 if (m == NULL) {
1694 return NULL;
1695 }
1696
1697 AnnotationArray* type_annotations = m->type_annotations();
1698 if (type_annotations != NULL) {
1699 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1700 return (jbyteArray) JNIHandles::make_local(env, a);
1701 }
1702
1703 return NULL;
1704 JVM_END
1705
1706 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1707 assert (field != NULL, "illegal field");
1708 JVMWrapper("JVM_GetFieldTypeAnnotations");
1709
1710 fieldDescriptor fd;
1711 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1712 if (!gotFd) {
1713 return NULL;
1714 }
1715
1716 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1717 JVM_END
1718
1719 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1720 if (!cp->is_within_bounds(index)) {
1721 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1722 }
1723 }
1724
1725 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1726 {
1727 JVMWrapper("JVM_GetMethodParameters");
1728 // method is a handle to a java.lang.reflect.Method object
1729 Method* method_ptr = jvm_get_method_common(method);
1730 methodHandle mh (THREAD, method_ptr);
1731 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1732 const int num_params = mh->method_parameters_length();
1733
1734 if (num_params < 0) {
1735 // A -1 return value from method_parameters_length means there is no
1736 // parameter data. Return null to indicate this to the reflection
1737 // API.
1738 assert(num_params == -1, "num_params should be -1 if it is less than zero");
1739 return (jobjectArray)NULL;
1740 } else {
1741 // Otherwise, we return something up to reflection, even if it is
1742 // a zero-length array. Why? Because in some cases this can
1743 // trigger a MalformedParametersException.
1744
1745 // make sure all the symbols are properly formatted
1746 for (int i = 0; i < num_params; i++) {
1747 MethodParametersElement* params = mh->method_parameters_start();
1748 int index = params[i].name_cp_index;
1749 bounds_check(mh->constants(), index, CHECK_NULL);
1750
1751 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1752 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1753 "Wrong type at constant pool index");
1754 }
1755
1756 }
1757
1758 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1759 objArrayHandle result (THREAD, result_oop);
1760
1761 for (int i = 0; i < num_params; i++) {
1762 MethodParametersElement* params = mh->method_parameters_start();
1763 // For a 0 index, give a NULL symbol
1764 Symbol* sym = 0 != params[i].name_cp_index ?
1765 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1766 int flags = params[i].flags;
1767 oop param = Reflection::new_parameter(reflected_method, i, sym,
1768 flags, CHECK_NULL);
1769 result->obj_at_put(i, param);
1770 }
1771 return (jobjectArray)JNIHandles::make_local(env, result());
1772 }
1773 }
1774 JVM_END
1775
1776 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1777
1778 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1779 {
1780 JVMWrapper("JVM_GetClassDeclaredFields");
1781 JvmtiVMObjectAllocEventCollector oam;
1782
1783 // Exclude primitive types and array types
1784 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1785 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1786 // Return empty array
1787 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1788 return (jobjectArray) JNIHandles::make_local(env, res);
1789 }
1790
1791 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1792 constantPoolHandle cp(THREAD, k->constants());
1793
1794 // Ensure class is linked
1795 k->link_class(CHECK_NULL);
1796
1797 // 4496456 We need to filter out java.lang.Throwable.backtrace
1798 bool skip_backtrace = false;
1799
1800 // Allocate result
1801 int num_fields;
1802
1803 if (publicOnly) {
1804 num_fields = 0;
1805 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1806 if (fs.access_flags().is_public()) ++num_fields;
1807 }
1808 } else {
1809 num_fields = k->java_fields_count();
1810
1811 if (k() == SystemDictionary::Throwable_klass()) {
1812 num_fields--;
1813 skip_backtrace = true;
1814 }
1815 }
1816
1817 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1818 objArrayHandle result (THREAD, r);
1819
1820 int out_idx = 0;
1821 fieldDescriptor fd;
1822 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1823 if (skip_backtrace) {
1824 // 4496456 skip java.lang.Throwable.backtrace
1825 int offset = fs.offset();
1826 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1827 }
1828
1829 if (!publicOnly || fs.access_flags().is_public()) {
1830 fd.reinitialize(k(), fs.index());
1831 oop field = Reflection::new_field(&fd, CHECK_NULL);
1832 result->obj_at_put(out_idx, field);
1833 ++out_idx;
1834 }
1835 }
1836 assert(out_idx == num_fields, "just checking");
1837 return (jobjectArray) JNIHandles::make_local(env, result());
1838 }
1839 JVM_END
1840
1841 static bool select_method(methodHandle method, bool want_constructor) {
1842 if (want_constructor) {
1843 return (method->is_initializer() && !method->is_static());
1844 } else {
1845 return (!method->is_initializer() && !method->is_overpass());
1846 }
1847 }
1848
1849 static jobjectArray get_class_declared_methods_helper(
1850 JNIEnv *env,
1851 jclass ofClass, jboolean publicOnly,
1852 bool want_constructor,
1853 Klass* klass, TRAPS) {
1854
1855 JvmtiVMObjectAllocEventCollector oam;
1856
1857 // Exclude primitive types and array types
1858 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1859 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1860 // Return empty array
1861 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
1862 return (jobjectArray) JNIHandles::make_local(env, res);
1863 }
1864
1865 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1866
1867 // Ensure class is linked
1868 k->link_class(CHECK_NULL);
1869
1870 Array<Method*>* methods = k->methods();
1871 int methods_length = methods->length();
1872
1873 // Save original method_idnum in case of redefinition, which can change
1874 // the idnum of obsolete methods. The new method will have the same idnum
1875 // but if we refresh the methods array, the counts will be wrong.
1876 ResourceMark rm(THREAD);
1877 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
1878 int num_methods = 0;
1879
1880 for (int i = 0; i < methods_length; i++) {
1881 methodHandle method(THREAD, methods->at(i));
1882 if (select_method(method, want_constructor)) {
1883 if (!publicOnly || method->is_public()) {
1884 idnums->push(method->method_idnum());
1885 ++num_methods;
1886 }
1887 }
1888 }
1889
1890 // Allocate result
1891 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
1892 objArrayHandle result (THREAD, r);
1893
1894 // Now just put the methods that we selected above, but go by their idnum
1895 // in case of redefinition. The methods can be redefined at any safepoint,
1896 // so above when allocating the oop array and below when creating reflect
1897 // objects.
1898 for (int i = 0; i < num_methods; i++) {
1899 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
1900 if (method.is_null()) {
1901 // Method may have been deleted and seems this API can handle null
1902 // Otherwise should probably put a method that throws NSME
1903 result->obj_at_put(i, NULL);
1904 } else {
1905 oop m;
1906 if (want_constructor) {
1907 m = Reflection::new_constructor(method, CHECK_NULL);
1908 } else {
1909 m = Reflection::new_method(method, false, CHECK_NULL);
1910 }
1911 result->obj_at_put(i, m);
1912 }
1913 }
1914
1915 return (jobjectArray) JNIHandles::make_local(env, result());
1916 }
1917
1918 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1919 {
1920 JVMWrapper("JVM_GetClassDeclaredMethods");
1921 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1922 /*want_constructor*/ false,
1923 SystemDictionary::reflect_Method_klass(), THREAD);
1924 }
1925 JVM_END
1926
1927 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1928 {
1929 JVMWrapper("JVM_GetClassDeclaredConstructors");
1930 return get_class_declared_methods_helper(env, ofClass, publicOnly,
1931 /*want_constructor*/ true,
1932 SystemDictionary::reflect_Constructor_klass(), THREAD);
1933 }
1934 JVM_END
1935
1936 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1937 {
1938 JVMWrapper("JVM_GetClassAccessFlags");
1939 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1940 // Primitive type
1941 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1942 }
1943
1944 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1945 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1946 }
1947 JVM_END
1948
1949
1950 // Constant pool access //////////////////////////////////////////////////////////
1951
1952 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1953 {
1954 JVMWrapper("JVM_GetClassConstantPool");
1955 JvmtiVMObjectAllocEventCollector oam;
1956
1957 // Return null for primitives and arrays
1958 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1959 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1960 if (k->oop_is_instance()) {
1961 instanceKlassHandle k_h(THREAD, k);
1962 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1963 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1964 return JNIHandles::make_local(jcp());
1965 }
1966 }
1967 return NULL;
1968 }
1969 JVM_END
1970
1971
1972 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1973 {
1974 JVMWrapper("JVM_ConstantPoolGetSize");
1975 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1976 return cp->length();
1977 }
1978 JVM_END
1979
1980
1981 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1982 {
1983 JVMWrapper("JVM_ConstantPoolGetClassAt");
1984 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1985 bounds_check(cp, index, CHECK_NULL);
1986 constantTag tag = cp->tag_at(index);
1987 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1988 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1989 }
1990 Klass* k = cp->klass_at(index, CHECK_NULL);
1991 return (jclass) JNIHandles::make_local(k->java_mirror());
1992 }
1993 JVM_END
1994
1995 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1996 {
1997 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1998 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1999 bounds_check(cp, index, CHECK_NULL);
2000 constantTag tag = cp->tag_at(index);
2001 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2002 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2003 }
2004 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2005 if (k == NULL) return NULL;
2006 return (jclass) JNIHandles::make_local(k->java_mirror());
2007 }
2008 JVM_END
2009
2010 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2011 constantTag tag = cp->tag_at(index);
2012 if (!tag.is_method() && !tag.is_interface_method()) {
2013 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2014 }
2015 int klass_ref = cp->uncached_klass_ref_index_at(index);
2016 Klass* k_o;
2017 if (force_resolution) {
2018 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2019 } else {
2020 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2021 if (k_o == NULL) return NULL;
2022 }
2023 instanceKlassHandle k(THREAD, k_o);
2024 Symbol* name = cp->uncached_name_ref_at(index);
2025 Symbol* sig = cp->uncached_signature_ref_at(index);
2026 methodHandle m (THREAD, k->find_method(name, sig));
2027 if (m.is_null()) {
2028 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2029 }
2030 oop method;
2031 if (!m->is_initializer() || m->is_static()) {
2032 method = Reflection::new_method(m, true, CHECK_NULL);
2033 } else {
2034 method = Reflection::new_constructor(m, CHECK_NULL);
2035 }
2036 return JNIHandles::make_local(method);
2037 }
2038
2039 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2040 {
2041 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2042 JvmtiVMObjectAllocEventCollector oam;
2043 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2044 bounds_check(cp, index, CHECK_NULL);
2045 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2046 return res;
2047 }
2048 JVM_END
2049
2050 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2051 {
2052 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2053 JvmtiVMObjectAllocEventCollector oam;
2054 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2055 bounds_check(cp, index, CHECK_NULL);
2056 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2057 return res;
2058 }
2059 JVM_END
2060
2061 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2062 constantTag tag = cp->tag_at(index);
2063 if (!tag.is_field()) {
2064 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2065 }
2066 int klass_ref = cp->uncached_klass_ref_index_at(index);
2067 Klass* k_o;
2068 if (force_resolution) {
2069 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2070 } else {
2071 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2072 if (k_o == NULL) return NULL;
2073 }
2074 instanceKlassHandle k(THREAD, k_o);
2075 Symbol* name = cp->uncached_name_ref_at(index);
2076 Symbol* sig = cp->uncached_signature_ref_at(index);
2077 fieldDescriptor fd;
2078 Klass* target_klass = k->find_field(name, sig, &fd);
2079 if (target_klass == NULL) {
2080 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2081 }
2082 oop field = Reflection::new_field(&fd, CHECK_NULL);
2083 return JNIHandles::make_local(field);
2084 }
2085
2086 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2087 {
2088 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2089 JvmtiVMObjectAllocEventCollector oam;
2090 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2091 bounds_check(cp, index, CHECK_NULL);
2092 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2093 return res;
2094 }
2095 JVM_END
2096
2097 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2098 {
2099 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2100 JvmtiVMObjectAllocEventCollector oam;
2101 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2102 bounds_check(cp, index, CHECK_NULL);
2103 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2104 return res;
2105 }
2106 JVM_END
2107
2108 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2109 {
2110 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2111 JvmtiVMObjectAllocEventCollector oam;
2112 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2113 bounds_check(cp, index, CHECK_NULL);
2114 constantTag tag = cp->tag_at(index);
2115 if (!tag.is_field_or_method()) {
2116 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2117 }
2118 int klass_ref = cp->uncached_klass_ref_index_at(index);
2119 Symbol* klass_name = cp->klass_name_at(klass_ref);
2120 Symbol* member_name = cp->uncached_name_ref_at(index);
2121 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2122 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2123 objArrayHandle dest(THREAD, dest_o);
2124 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2125 dest->obj_at_put(0, str());
2126 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2127 dest->obj_at_put(1, str());
2128 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2129 dest->obj_at_put(2, str());
2130 return (jobjectArray) JNIHandles::make_local(dest());
2131 }
2132 JVM_END
2133
2134 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2135 {
2136 JVMWrapper("JVM_ConstantPoolGetIntAt");
2137 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2138 bounds_check(cp, index, CHECK_0);
2139 constantTag tag = cp->tag_at(index);
2140 if (!tag.is_int()) {
2141 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2142 }
2143 return cp->int_at(index);
2144 }
2145 JVM_END
2146
2147 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2148 {
2149 JVMWrapper("JVM_ConstantPoolGetLongAt");
2150 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2151 bounds_check(cp, index, CHECK_(0L));
2152 constantTag tag = cp->tag_at(index);
2153 if (!tag.is_long()) {
2154 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2155 }
2156 return cp->long_at(index);
2157 }
2158 JVM_END
2159
2160 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2161 {
2162 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2163 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2164 bounds_check(cp, index, CHECK_(0.0f));
2165 constantTag tag = cp->tag_at(index);
2166 if (!tag.is_float()) {
2167 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2168 }
2169 return cp->float_at(index);
2170 }
2171 JVM_END
2172
2173 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2174 {
2175 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2176 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2177 bounds_check(cp, index, CHECK_(0.0));
2178 constantTag tag = cp->tag_at(index);
2179 if (!tag.is_double()) {
2180 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2181 }
2182 return cp->double_at(index);
2183 }
2184 JVM_END
2185
2186 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2187 {
2188 JVMWrapper("JVM_ConstantPoolGetStringAt");
2189 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2190 bounds_check(cp, index, CHECK_NULL);
2191 constantTag tag = cp->tag_at(index);
2192 if (!tag.is_string()) {
2193 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2194 }
2195 oop str = cp->string_at(index, CHECK_NULL);
2196 return (jstring) JNIHandles::make_local(str);
2197 }
2198 JVM_END
2199
2200 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2201 {
2202 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2203 JvmtiVMObjectAllocEventCollector oam;
2204 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2205 bounds_check(cp, index, CHECK_NULL);
2206 constantTag tag = cp->tag_at(index);
2207 if (!tag.is_symbol()) {
2208 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2209 }
2210 Symbol* sym = cp->symbol_at(index);
2211 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2212 return (jstring) JNIHandles::make_local(str());
2213 }
2214 JVM_END
2215
2216
2217 // Assertion support. //////////////////////////////////////////////////////////
2218
2219 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2220 JVMWrapper("JVM_DesiredAssertionStatus");
2221 assert(cls != NULL, "bad class");
2222
2223 oop r = JNIHandles::resolve(cls);
2224 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2225 if (java_lang_Class::is_primitive(r)) return false;
2226
2227 Klass* k = java_lang_Class::as_Klass(r);
2228 assert(k->oop_is_instance(), "must be an instance klass");
2229 if (! k->oop_is_instance()) return false;
2230
2231 ResourceMark rm(THREAD);
2232 const char* name = k->name()->as_C_string();
2233 bool system_class = k->class_loader() == NULL;
2234 return JavaAssertions::enabled(name, system_class);
2235
2236 JVM_END
2237
2238
2239 // Return a new AssertionStatusDirectives object with the fields filled in with
2240 // command-line assertion arguments (i.e., -ea, -da).
2241 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2242 JVMWrapper("JVM_AssertionStatusDirectives");
2243 JvmtiVMObjectAllocEventCollector oam;
2244 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2245 return JNIHandles::make_local(env, asd);
2246 JVM_END
2247
2248 // Verification ////////////////////////////////////////////////////////////////////////////////
2249
2250 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2251
2252 // RedefineClasses support: bug 6214132 caused verification to fail.
2253 // All functions from this section should call the jvmtiThreadSate function:
2254 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2255 // The function returns a Klass* of the _scratch_class if the verifier
2256 // was invoked in the middle of the class redefinition.
2257 // Otherwise it returns its argument value which is the _the_class Klass*.
2258 // Please, refer to the description in the jvmtiThreadSate.hpp.
2259
2260 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2261 JVMWrapper("JVM_GetClassNameUTF");
2262 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 return k->name()->as_utf8();
2265 JVM_END
2266
2267
2268 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2269 JVMWrapper("JVM_GetClassCPTypes");
2270 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2272 // types will have length zero if this is not an InstanceKlass
2273 // (length is determined by call to JVM_GetClassCPEntriesCount)
2274 if (k->oop_is_instance()) {
2275 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2276 for (int index = cp->length() - 1; index >= 0; index--) {
2277 constantTag tag = cp->tag_at(index);
2278 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2279 }
2280 }
2281 JVM_END
2282
2283
2284 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2285 JVMWrapper("JVM_GetClassCPEntriesCount");
2286 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2287 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2288 if (!k->oop_is_instance())
2289 return 0;
2290 return InstanceKlass::cast(k)->constants()->length();
2291 JVM_END
2292
2293
2294 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2295 JVMWrapper("JVM_GetClassFieldsCount");
2296 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2298 if (!k->oop_is_instance())
2299 return 0;
2300 return InstanceKlass::cast(k)->java_fields_count();
2301 JVM_END
2302
2303
2304 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2305 JVMWrapper("JVM_GetClassMethodsCount");
2306 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2307 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2308 if (!k->oop_is_instance())
2309 return 0;
2310 return InstanceKlass::cast(k)->methods()->length();
2311 JVM_END
2312
2313
2314 // The following methods, used for the verifier, are never called with
2315 // array klasses, so a direct cast to InstanceKlass is safe.
2316 // Typically, these methods are called in a loop with bounds determined
2317 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2318 // zero for arrays.
2319 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2320 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2321 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2322 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2323 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2324 int length = method->checked_exceptions_length();
2325 if (length > 0) {
2326 CheckedExceptionElement* table= method->checked_exceptions_start();
2327 for (int i = 0; i < length; i++) {
2328 exceptions[i] = table[i].class_cp_index;
2329 }
2330 }
2331 JVM_END
2332
2333
2334 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2335 JVMWrapper("JVM_GetMethodIxExceptionsCount");
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 return method->checked_exceptions_length();
2340 JVM_END
2341
2342
2343 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2344 JVMWrapper("JVM_GetMethodIxByteCode");
2345 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2348 memcpy(code, method->code_base(), method->code_size());
2349 JVM_END
2350
2351
2352 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2353 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2357 return method->code_size();
2358 JVM_END
2359
2360
2361 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2362 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2363 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2364 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2365 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2366 ExceptionTable extable(method);
2367 entry->start_pc = extable.start_pc(entry_index);
2368 entry->end_pc = extable.end_pc(entry_index);
2369 entry->handler_pc = extable.handler_pc(entry_index);
2370 entry->catchType = extable.catch_type_index(entry_index);
2371 JVM_END
2372
2373
2374 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2375 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379 return method->exception_table_length();
2380 JVM_END
2381
2382
2383 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2384 JVMWrapper("JVM_GetMethodIxModifiers");
2385 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2386 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2387 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2388 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2389 JVM_END
2390
2391
2392 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2393 JVMWrapper("JVM_GetFieldIxModifiers");
2394 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2395 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2396 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2397 JVM_END
2398
2399
2400 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2401 JVMWrapper("JVM_GetMethodIxLocalsCount");
2402 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2403 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2404 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2405 return method->max_locals();
2406 JVM_END
2407
2408
2409 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2410 JVMWrapper("JVM_GetMethodIxArgsSize");
2411 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2412 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2413 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2414 return method->size_of_parameters();
2415 JVM_END
2416
2417
2418 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2419 JVMWrapper("JVM_GetMethodIxMaxStack");
2420 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2421 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2422 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2423 return method->verifier_max_stack();
2424 JVM_END
2425
2426
2427 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2428 JVMWrapper("JVM_IsConstructorIx");
2429 ResourceMark rm(THREAD);
2430 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2431 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2432 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2433 return method->name() == vmSymbols::object_initializer_name();
2434 JVM_END
2435
2436
2437 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2438 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2439 ResourceMark rm(THREAD);
2440 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2441 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2442 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2443 return method->is_overpass();
2444 JVM_END
2445
2446 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2447 JVMWrapper("JVM_GetMethodIxIxUTF");
2448 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2449 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2450 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2451 return method->name()->as_utf8();
2452 JVM_END
2453
2454
2455 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2456 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2457 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2458 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2459 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2460 return method->signature()->as_utf8();
2461 JVM_END
2462
2463 /**
2464 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2465 * read entries in the constant pool. Since the old verifier always
2466 * works on a copy of the code, it will not see any rewriting that
2467 * may possibly occur in the middle of verification. So it is important
2468 * that nothing it calls tries to use the cpCache instead of the raw
2469 * constant pool, so we must use cp->uncached_x methods when appropriate.
2470 */
2471 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2472 JVMWrapper("JVM_GetCPFieldNameUTF");
2473 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2474 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2475 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2476 switch (cp->tag_at(cp_index).value()) {
2477 case JVM_CONSTANT_Fieldref:
2478 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2479 default:
2480 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2481 }
2482 ShouldNotReachHere();
2483 return NULL;
2484 JVM_END
2485
2486
2487 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2488 JVMWrapper("JVM_GetCPMethodNameUTF");
2489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2490 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2491 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2492 switch (cp->tag_at(cp_index).value()) {
2493 case JVM_CONSTANT_InterfaceMethodref:
2494 case JVM_CONSTANT_Methodref:
2495 case JVM_CONSTANT_NameAndType: // for invokedynamic
2496 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2497 default:
2498 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2499 }
2500 ShouldNotReachHere();
2501 return NULL;
2502 JVM_END
2503
2504
2505 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2506 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2508 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2509 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2510 switch (cp->tag_at(cp_index).value()) {
2511 case JVM_CONSTANT_InterfaceMethodref:
2512 case JVM_CONSTANT_Methodref:
2513 case JVM_CONSTANT_NameAndType: // for invokedynamic
2514 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2515 default:
2516 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2517 }
2518 ShouldNotReachHere();
2519 return NULL;
2520 JVM_END
2521
2522
2523 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2524 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2525 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2526 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2527 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2528 switch (cp->tag_at(cp_index).value()) {
2529 case JVM_CONSTANT_Fieldref:
2530 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2531 default:
2532 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2533 }
2534 ShouldNotReachHere();
2535 return NULL;
2536 JVM_END
2537
2538
2539 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2540 JVMWrapper("JVM_GetCPClassNameUTF");
2541 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2542 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2543 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2544 Symbol* classname = cp->klass_name_at(cp_index);
2545 return classname->as_utf8();
2546 JVM_END
2547
2548
2549 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2550 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2551 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2553 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2554 switch (cp->tag_at(cp_index).value()) {
2555 case JVM_CONSTANT_Fieldref: {
2556 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2557 Symbol* classname = cp->klass_name_at(class_index);
2558 return classname->as_utf8();
2559 }
2560 default:
2561 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2562 }
2563 ShouldNotReachHere();
2564 return NULL;
2565 JVM_END
2566
2567
2568 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2569 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2570 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2571 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2572 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2573 switch (cp->tag_at(cp_index).value()) {
2574 case JVM_CONSTANT_Methodref:
2575 case JVM_CONSTANT_InterfaceMethodref: {
2576 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2577 Symbol* classname = cp->klass_name_at(class_index);
2578 return classname->as_utf8();
2579 }
2580 default:
2581 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2582 }
2583 ShouldNotReachHere();
2584 return NULL;
2585 JVM_END
2586
2587
2588 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2589 JVMWrapper("JVM_GetCPFieldModifiers");
2590 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2591 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2592 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2593 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2594 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2595 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2596 switch (cp->tag_at(cp_index).value()) {
2597 case JVM_CONSTANT_Fieldref: {
2598 Symbol* name = cp->uncached_name_ref_at(cp_index);
2599 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2600 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2601 if (fs.name() == name && fs.signature() == signature) {
2602 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2603 }
2604 }
2605 return -1;
2606 }
2607 default:
2608 fatal("JVM_GetCPFieldModifiers: illegal constant");
2609 }
2610 ShouldNotReachHere();
2611 return 0;
2612 JVM_END
2613
2614
2615 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2616 JVMWrapper("JVM_GetCPMethodModifiers");
2617 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2618 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2619 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2620 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2621 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2622 switch (cp->tag_at(cp_index).value()) {
2623 case JVM_CONSTANT_Methodref:
2624 case JVM_CONSTANT_InterfaceMethodref: {
2625 Symbol* name = cp->uncached_name_ref_at(cp_index);
2626 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2627 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2628 int methods_count = methods->length();
2629 for (int i = 0; i < methods_count; i++) {
2630 Method* method = methods->at(i);
2631 if (method->name() == name && method->signature() == signature) {
2632 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2633 }
2634 }
2635 return -1;
2636 }
2637 default:
2638 fatal("JVM_GetCPMethodModifiers: illegal constant");
2639 }
2640 ShouldNotReachHere();
2641 return 0;
2642 JVM_END
2643
2644
2645 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2646
2647 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2648 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2649 JVM_END
2650
2651
2652 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2653 JVMWrapper("JVM_IsSameClassPackage");
2654 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2655 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2656 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2657 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2658 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2659 JVM_END
2660
2661 // Printing support //////////////////////////////////////////////////
2662 extern "C" {
2663
2664 ATTRIBUTE_PRINTF(3, 0)
2665 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2666 // see bug 4399518, 4417214
2667 if ((intptr_t)count <= 0) return -1;
2668
2669 int result = vsnprintf(str, count, fmt, args);
2670 // Note: on truncation vsnprintf(3) on Unix returns numbers of
2671 // characters which would have been written had the buffer been large
2672 // enough; on Windows, it returns -1. We handle both cases here and
2673 // always return -1, and perform null termination.
2674 if ((result > 0 && (size_t)result >= count) || result == -1) {
2675 str[count - 1] = '\0';
2676 result = -1;
2677 }
2678
2679 return result;
2680 }
2681
2682 ATTRIBUTE_PRINTF(3, 0)
2683 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2684 va_list args;
2685 int len;
2686 va_start(args, fmt);
2687 len = jio_vsnprintf(str, count, fmt, args);
2688 va_end(args);
2689 return len;
2690 }
2691
2692 ATTRIBUTE_PRINTF(2,3)
2693 int jio_fprintf(FILE* f, const char *fmt, ...) {
2694 int len;
2695 va_list args;
2696 va_start(args, fmt);
2697 len = jio_vfprintf(f, fmt, args);
2698 va_end(args);
2699 return len;
2700 }
2701
2702 ATTRIBUTE_PRINTF(2, 0)
2703 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2704 if (Arguments::vfprintf_hook() != NULL) {
2705 return Arguments::vfprintf_hook()(f, fmt, args);
2706 } else {
2707 return vfprintf(f, fmt, args);
2708 }
2709 }
2710
2711 ATTRIBUTE_PRINTF(1, 2)
2712 JNIEXPORT int jio_printf(const char *fmt, ...) {
2713 int len;
2714 va_list args;
2715 va_start(args, fmt);
2716 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2717 va_end(args);
2718 return len;
2719 }
2720
2721
2722 // HotSpot specific jio method
2723 void jio_print(const char* s) {
2724 // Try to make this function as atomic as possible.
2725 if (Arguments::vfprintf_hook() != NULL) {
2726 jio_fprintf(defaultStream::output_stream(), "%s", s);
2727 } else {
2728 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2729 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2730 }
2731 }
2732
2733 } // Extern C
2734
2735 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2736
2737 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2738 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2739 // OSThread objects. The exception to this rule is when the target object is the thread
2740 // doing the operation, in which case we know that the thread won't exit until the
2741 // operation is done (all exits being voluntary). There are a few cases where it is
2742 // rather silly to do operations on yourself, like resuming yourself or asking whether
2743 // you are alive. While these can still happen, they are not subject to deadlocks if
2744 // the lock is held while the operation occurs (this is not the case for suspend, for
2745 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2746 // implementation is local to this file, we always lock Threads_lock for that one.
2747
2748 static void thread_entry(JavaThread* thread, TRAPS) {
2749 HandleMark hm(THREAD);
2750 Handle obj(THREAD, thread->threadObj());
2751 JavaValue result(T_VOID);
2752 JavaCalls::call_virtual(&result,
2753 obj,
2754 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2755 vmSymbols::run_method_name(),
2756 vmSymbols::void_method_signature(),
2757 THREAD);
2758 }
2759
2760
2761 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2762 JVMWrapper("JVM_StartThread");
2763 JavaThread *native_thread = NULL;
2764
2765 // We cannot hold the Threads_lock when we throw an exception,
2766 // due to rank ordering issues. Example: we might need to grab the
2767 // Heap_lock while we construct the exception.
2768 bool throw_illegal_thread_state = false;
2769
2770 // We must release the Threads_lock before we can post a jvmti event
2771 // in Thread::start.
2772 {
2773 // Ensure that the C++ Thread and OSThread structures aren't freed before
2774 // we operate.
2775 MutexLocker mu(Threads_lock);
2776
2777 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2778 // re-starting an already started thread, so we should usually find
2779 // that the JavaThread is null. However for a JNI attached thread
2780 // there is a small window between the Thread object being created
2781 // (with its JavaThread set) and the update to its threadStatus, so we
2782 // have to check for this
2783 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2784 throw_illegal_thread_state = true;
2785 } else {
2786 // We could also check the stillborn flag to see if this thread was already stopped, but
2787 // for historical reasons we let the thread detect that itself when it starts running
2788
2789 jlong size =
2790 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2791 // Allocate the C++ Thread structure and create the native thread. The
2792 // stack size retrieved from java is signed, but the constructor takes
2793 // size_t (an unsigned type), so avoid passing negative values which would
2794 // result in really large stacks.
2795 size_t sz = size > 0 ? (size_t) size : 0;
2796 native_thread = new JavaThread(&thread_entry, sz);
2797
2798 // At this point it may be possible that no osthread was created for the
2799 // JavaThread due to lack of memory. Check for this situation and throw
2800 // an exception if necessary. Eventually we may want to change this so
2801 // that we only grab the lock if the thread was created successfully -
2802 // then we can also do this check and throw the exception in the
2803 // JavaThread constructor.
2804 if (native_thread->osthread() != NULL) {
2805 // Note: the current thread is not being used within "prepare".
2806 native_thread->prepare(jthread);
2807 }
2808 }
2809 }
2810
2811 if (throw_illegal_thread_state) {
2812 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2813 }
2814
2815 assert(native_thread != NULL, "Starting null thread?");
2816
2817 if (native_thread->osthread() == NULL) {
2818 // No one should hold a reference to the 'native_thread'.
2819 delete native_thread;
2820 if (JvmtiExport::should_post_resource_exhausted()) {
2821 JvmtiExport::post_resource_exhausted(
2822 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2823 os::native_thread_creation_failed_msg());
2824 }
2825 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2826 os::native_thread_creation_failed_msg());
2827 }
2828
2829 Thread::start(native_thread);
2830
2831 JVM_END
2832
2833 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2834 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2835 // but is thought to be reliable and simple. In the case, where the receiver is the
2836 // same thread as the sender, no safepoint is needed.
2837 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2838 JVMWrapper("JVM_StopThread");
2839
2840 oop java_throwable = JNIHandles::resolve(throwable);
2841 if (java_throwable == NULL) {
2842 THROW(vmSymbols::java_lang_NullPointerException());
2843 }
2844 oop java_thread = JNIHandles::resolve_non_null(jthread);
2845 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2846 Events::log_exception(JavaThread::current(),
2847 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2848 p2i(receiver), p2i((address)java_thread), p2i(throwable));
2849 // First check if thread is alive
2850 if (receiver != NULL) {
2851 // Check if exception is getting thrown at self (use oop equality, since the
2852 // target object might exit)
2853 if (java_thread == thread->threadObj()) {
2854 THROW_OOP(java_throwable);
2855 } else {
2856 // Enques a VM_Operation to stop all threads and then deliver the exception...
2857 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2858 }
2859 }
2860 else {
2861 // Either:
2862 // - target thread has not been started before being stopped, or
2863 // - target thread already terminated
2864 // We could read the threadStatus to determine which case it is
2865 // but that is overkill as it doesn't matter. We must set the
2866 // stillborn flag for the first case, and if the thread has already
2867 // exited setting this flag has no affect
2868 java_lang_Thread::set_stillborn(java_thread);
2869 }
2870 JVM_END
2871
2872
2873 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2874 JVMWrapper("JVM_IsThreadAlive");
2875
2876 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2877 return java_lang_Thread::is_alive(thread_oop);
2878 JVM_END
2879
2880
2881 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2882 JVMWrapper("JVM_SuspendThread");
2883 oop java_thread = JNIHandles::resolve_non_null(jthread);
2884 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2885
2886 if (receiver != NULL) {
2887 // thread has run and has not exited (still on threads list)
2888
2889 {
2890 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2891 if (receiver->is_external_suspend()) {
2892 // Don't allow nested external suspend requests. We can't return
2893 // an error from this interface so just ignore the problem.
2894 return;
2895 }
2896 if (receiver->is_exiting()) { // thread is in the process of exiting
2897 return;
2898 }
2899 receiver->set_external_suspend();
2900 }
2901
2902 // java_suspend() will catch threads in the process of exiting
2903 // and will ignore them.
2904 receiver->java_suspend();
2905
2906 // It would be nice to have the following assertion in all the
2907 // time, but it is possible for a racing resume request to have
2908 // resumed this thread right after we suspended it. Temporarily
2909 // enable this assertion if you are chasing a different kind of
2910 // bug.
2911 //
2912 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2913 // receiver->is_being_ext_suspended(), "thread is not suspended");
2914 }
2915 JVM_END
2916
2917
2918 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2919 JVMWrapper("JVM_ResumeThread");
2920 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2921 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2922 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2923 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2924 // looks at it.
2925 MutexLocker ml(Threads_lock);
2926 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2927 if (thr != NULL) {
2928 // the thread has run and is not in the process of exiting
2929 thr->java_resume();
2930 }
2931 JVM_END
2932
2933
2934 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2935 JVMWrapper("JVM_SetThreadPriority");
2936 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2937 MutexLocker ml(Threads_lock);
2938 oop java_thread = JNIHandles::resolve_non_null(jthread);
2939 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2940 JavaThread* thr = java_lang_Thread::thread(java_thread);
2941 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2942 Thread::set_priority(thr, (ThreadPriority)prio);
2943 }
2944 JVM_END
2945
2946
2947 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2948 JVMWrapper("JVM_Yield");
2949 if (os::dont_yield()) return;
2950 HOTSPOT_THREAD_YIELD();
2951
2952 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2953 // Critical for similar threading behaviour
2954 if (ConvertYieldToSleep) {
2955 os::sleep(thread, MinSleepInterval, false);
2956 } else {
2957 os::naked_yield();
2958 }
2959 JVM_END
2960
2961
2962 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2963 JVMWrapper("JVM_Sleep");
2964
2965 if (millis < 0) {
2966 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2967 }
2968
2969 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2970 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2971 }
2972
2973 // Save current thread state and restore it at the end of this block.
2974 // And set new thread state to SLEEPING.
2975 JavaThreadSleepState jtss(thread);
2976
2977 HOTSPOT_THREAD_SLEEP_BEGIN(millis);
2978
2979 EventThreadSleep event;
2980
2981 if (millis == 0) {
2982 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2983 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2984 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2985 // for SOLARIS
2986 if (ConvertSleepToYield) {
2987 os::naked_yield();
2988 } else {
2989 ThreadState old_state = thread->osthread()->get_state();
2990 thread->osthread()->set_state(SLEEPING);
2991 os::sleep(thread, MinSleepInterval, false);
2992 thread->osthread()->set_state(old_state);
2993 }
2994 } else {
2995 ThreadState old_state = thread->osthread()->get_state();
2996 thread->osthread()->set_state(SLEEPING);
2997 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2998 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2999 // us while we were sleeping. We do not overwrite those.
3000 if (!HAS_PENDING_EXCEPTION) {
3001 if (event.should_commit()) {
3002 event.set_time(millis);
3003 event.commit();
3004 }
3005 HOTSPOT_THREAD_SLEEP_END(1);
3006
3007 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3008 // to properly restore the thread state. That's likely wrong.
3009 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3010 }
3011 }
3012 thread->osthread()->set_state(old_state);
3013 }
3014 if (event.should_commit()) {
3015 event.set_time(millis);
3016 event.commit();
3017 }
3018 HOTSPOT_THREAD_SLEEP_END(0);
3019 JVM_END
3020
3021 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3022 JVMWrapper("JVM_CurrentThread");
3023 oop jthread = thread->threadObj();
3024 assert (thread != NULL, "no current thread!");
3025 return JNIHandles::make_local(env, jthread);
3026 JVM_END
3027
3028
3029 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3030 JVMWrapper("JVM_CountStackFrames");
3031
3032 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3033 oop java_thread = JNIHandles::resolve_non_null(jthread);
3034 bool throw_illegal_thread_state = false;
3035 int count = 0;
3036
3037 {
3038 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3039 // We need to re-resolve the java_thread, since a GC might have happened during the
3040 // acquire of the lock
3041 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3042
3043 if (thr == NULL) {
3044 // do nothing
3045 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3046 // Check whether this java thread has been suspended already. If not, throws
3047 // IllegalThreadStateException. We defer to throw that exception until
3048 // Threads_lock is released since loading exception class has to leave VM.
3049 // The correct way to test a thread is actually suspended is
3050 // wait_for_ext_suspend_completion(), but we can't call that while holding
3051 // the Threads_lock. The above tests are sufficient for our purposes
3052 // provided the walkability of the stack is stable - which it isn't
3053 // 100% but close enough for most practical purposes.
3054 throw_illegal_thread_state = true;
3055 } else {
3056 // Count all java activation, i.e., number of vframes
3057 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3058 // Native frames are not counted
3059 if (!vfst.method()->is_native()) count++;
3060 }
3061 }
3062 }
3063
3064 if (throw_illegal_thread_state) {
3065 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3066 "this thread is not suspended");
3067 }
3068 return count;
3069 JVM_END
3070
3071 // Consider: A better way to implement JVM_Interrupt() is to acquire
3072 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3073 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3074 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3075 // outside the critical section. Threads_lock is hot so we want to minimize
3076 // the hold-time. A cleaner interface would be to decompose interrupt into
3077 // two steps. The 1st phase, performed under Threads_lock, would return
3078 // a closure that'd be invoked after Threads_lock was dropped.
3079 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3080 // admit spurious wakeups.
3081
3082 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3083 JVMWrapper("JVM_Interrupt");
3084
3085 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3086 oop java_thread = JNIHandles::resolve_non_null(jthread);
3087 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3088 // We need to re-resolve the java_thread, since a GC might have happened during the
3089 // acquire of the lock
3090 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3091 if (thr != NULL) {
3092 Thread::interrupt(thr);
3093 }
3094 JVM_END
3095
3096
3097 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3098 JVMWrapper("JVM_IsInterrupted");
3099
3100 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3101 oop java_thread = JNIHandles::resolve_non_null(jthread);
3102 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3103 // We need to re-resolve the java_thread, since a GC might have happened during the
3104 // acquire of the lock
3105 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3106 if (thr == NULL) {
3107 return JNI_FALSE;
3108 } else {
3109 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3110 }
3111 JVM_END
3112
3113
3114 // Return true iff the current thread has locked the object passed in
3115
3116 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3117 JVMWrapper("JVM_HoldsLock");
3118 assert(THREAD->is_Java_thread(), "sanity check");
3119 if (obj == NULL) {
3120 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3121 }
3122 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3123 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3124 JVM_END
3125
3126
3127 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3128 JVMWrapper("JVM_DumpAllStacks");
3129 VM_PrintThreads op;
3130 VMThread::execute(&op);
3131 if (JvmtiExport::should_post_data_dump()) {
3132 JvmtiExport::post_data_dump();
3133 }
3134 JVM_END
3135
3136 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3137 JVMWrapper("JVM_SetNativeThreadName");
3138 ResourceMark rm(THREAD);
3139 oop java_thread = JNIHandles::resolve_non_null(jthread);
3140 JavaThread* thr = java_lang_Thread::thread(java_thread);
3141 // Thread naming only supported for the current thread, doesn't work for
3142 // target threads.
3143 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3144 // we don't set the name of an attached thread to avoid stepping
3145 // on other programs
3146 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3147 os::set_native_thread_name(thread_name);
3148 }
3149 JVM_END
3150
3151 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3152
3153 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3154 assert(jthread->is_Java_thread(), "must be a Java thread");
3155 if (jthread->privileged_stack_top() == NULL) return false;
3156 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3157 oop loader = jthread->privileged_stack_top()->class_loader();
3158 if (loader == NULL) return true;
3159 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3160 if (trusted) return true;
3161 }
3162 return false;
3163 }
3164
3165 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3166 JVMWrapper("JVM_CurrentLoadedClass");
3167 ResourceMark rm(THREAD);
3168
3169 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3170 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3171 bool trusted = is_trusted_frame(thread, &vfst);
3172 if (trusted) return NULL;
3173
3174 Method* m = vfst.method();
3175 if (!m->is_native()) {
3176 InstanceKlass* holder = m->method_holder();
3177 oop loader = holder->class_loader();
3178 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3179 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3180 }
3181 }
3182 }
3183 return NULL;
3184 JVM_END
3185
3186
3187 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3188 JVMWrapper("JVM_CurrentClassLoader");
3189 ResourceMark rm(THREAD);
3190
3191 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3192
3193 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3194 bool trusted = is_trusted_frame(thread, &vfst);
3195 if (trusted) return NULL;
3196
3197 Method* m = vfst.method();
3198 if (!m->is_native()) {
3199 InstanceKlass* holder = m->method_holder();
3200 assert(holder->is_klass(), "just checking");
3201 oop loader = holder->class_loader();
3202 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3203 return JNIHandles::make_local(env, loader);
3204 }
3205 }
3206 }
3207 return NULL;
3208 JVM_END
3209
3210
3211 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3212 JVMWrapper("JVM_GetClassContext");
3213 ResourceMark rm(THREAD);
3214 JvmtiVMObjectAllocEventCollector oam;
3215 vframeStream vfst(thread);
3216
3217 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3218 // This must only be called from SecurityManager.getClassContext
3219 Method* m = vfst.method();
3220 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3221 m->name() == vmSymbols::getClassContext_name() &&
3222 m->signature() == vmSymbols::void_class_array_signature())) {
3223 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3224 }
3225 }
3226
3227 // Collect method holders
3228 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3229 for (; !vfst.at_end(); vfst.security_next()) {
3230 Method* m = vfst.method();
3231 // Native frames are not returned
3232 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3233 Klass* holder = m->method_holder();
3234 assert(holder->is_klass(), "just checking");
3235 klass_array->append(holder);
3236 }
3237 }
3238
3239 // Create result array of type [Ljava/lang/Class;
3240 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3241 // Fill in mirrors corresponding to method holders
3242 for (int i = 0; i < klass_array->length(); i++) {
3243 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3244 }
3245
3246 return (jobjectArray) JNIHandles::make_local(env, result);
3247 JVM_END
3248
3249
3250 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3251 JVMWrapper("JVM_ClassDepth");
3252 ResourceMark rm(THREAD);
3253 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3254 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3255
3256 const char* str = java_lang_String::as_utf8_string(class_name_str());
3257 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3258 if (class_name_sym == NULL) {
3259 return -1;
3260 }
3261
3262 int depth = 0;
3263
3264 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3265 if (!vfst.method()->is_native()) {
3266 InstanceKlass* holder = vfst.method()->method_holder();
3267 assert(holder->is_klass(), "just checking");
3268 if (holder->name() == class_name_sym) {
3269 return depth;
3270 }
3271 depth++;
3272 }
3273 }
3274 return -1;
3275 JVM_END
3276
3277
3278 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3279 JVMWrapper("JVM_ClassLoaderDepth");
3280 ResourceMark rm(THREAD);
3281 int depth = 0;
3282 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3283 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3284 bool trusted = is_trusted_frame(thread, &vfst);
3285 if (trusted) return -1;
3286
3287 Method* m = vfst.method();
3288 if (!m->is_native()) {
3289 InstanceKlass* holder = m->method_holder();
3290 assert(holder->is_klass(), "just checking");
3291 oop loader = holder->class_loader();
3292 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3293 return depth;
3294 }
3295 depth++;
3296 }
3297 }
3298 return -1;
3299 JVM_END
3300
3301
3302 // java.lang.Package ////////////////////////////////////////////////////////////////
3303
3304
3305 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3306 JVMWrapper("JVM_GetSystemPackage");
3307 ResourceMark rm(THREAD);
3308 JvmtiVMObjectAllocEventCollector oam;
3309 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3310 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3311 return (jstring) JNIHandles::make_local(result);
3312 JVM_END
3313
3314
3315 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3316 JVMWrapper("JVM_GetSystemPackages");
3317 JvmtiVMObjectAllocEventCollector oam;
3318 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3319 return (jobjectArray) JNIHandles::make_local(result);
3320 JVM_END
3321
3322
3323 // ObjectInputStream ///////////////////////////////////////////////////////////////
3324
3325 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3326 if (current_class == NULL) {
3327 return true;
3328 }
3329 if ((current_class == field_class) || access.is_public()) {
3330 return true;
3331 }
3332
3333 if (access.is_protected()) {
3334 // See if current_class is a subclass of field_class
3335 if (current_class->is_subclass_of(field_class)) {
3336 return true;
3337 }
3338 }
3339
3340 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3341 }
3342
3343 // Return the first non-null class loader up the execution stack, or null
3344 // if only code from the null class loader is on the stack.
3345
3346 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3347 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3348 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3349 oop loader = vfst.method()->method_holder()->class_loader();
3350 if (loader != NULL) {
3351 return JNIHandles::make_local(env, loader);
3352 }
3353 }
3354 return NULL;
3355 JVM_END
3356
3357
3358 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3359
3360
3361 // resolve array handle and check arguments
3362 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3363 if (arr == NULL) {
3364 THROW_0(vmSymbols::java_lang_NullPointerException());
3365 }
3366 oop a = JNIHandles::resolve_non_null(arr);
3367 if (!a->is_array()) {
3368 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3369 } else if (type_array_only && !a->is_typeArray()) {
3370 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array of primitive type");
3371 }
3372 return arrayOop(a);
3373 }
3374
3375
3376 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3377 JVMWrapper("JVM_GetArrayLength");
3378 arrayOop a = check_array(env, arr, false, CHECK_0);
3379 return a->length();
3380 JVM_END
3381
3382
3383 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3384 JVMWrapper("JVM_Array_Get");
3385 JvmtiVMObjectAllocEventCollector oam;
3386 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3387 jvalue value;
3388 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3389 oop box = Reflection::box(&value, type, CHECK_NULL);
3390 return JNIHandles::make_local(env, box);
3391 JVM_END
3392
3393
3394 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3395 JVMWrapper("JVM_GetPrimitiveArrayElement");
3396 jvalue value;
3397 value.i = 0; // to initialize value before getting used in CHECK
3398 arrayOop a = check_array(env, arr, true, CHECK_(value));
3399 assert(a->is_typeArray(), "just checking");
3400 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3401 BasicType wide_type = (BasicType) wCode;
3402 if (type != wide_type) {
3403 Reflection::widen(&value, type, wide_type, CHECK_(value));
3404 }
3405 return value;
3406 JVM_END
3407
3408
3409 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3410 JVMWrapper("JVM_SetArrayElement");
3411 arrayOop a = check_array(env, arr, false, CHECK);
3412 oop box = JNIHandles::resolve(val);
3413 jvalue value;
3414 value.i = 0; // to initialize value before getting used in CHECK
3415 BasicType value_type;
3416 if (a->is_objArray()) {
3417 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3418 value_type = Reflection::unbox_for_regular_object(box, &value);
3419 } else {
3420 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3421 }
3422 Reflection::array_set(&value, a, index, value_type, CHECK);
3423 JVM_END
3424
3425
3426 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3427 JVMWrapper("JVM_SetPrimitiveArrayElement");
3428 arrayOop a = check_array(env, arr, true, CHECK);
3429 assert(a->is_typeArray(), "just checking");
3430 BasicType value_type = (BasicType) vCode;
3431 Reflection::array_set(&v, a, index, value_type, CHECK);
3432 JVM_END
3433
3434
3435 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3436 JVMWrapper("JVM_NewArray");
3437 JvmtiVMObjectAllocEventCollector oam;
3438 oop element_mirror = JNIHandles::resolve(eltClass);
3439 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3440 return JNIHandles::make_local(env, result);
3441 JVM_END
3442
3443
3444 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3445 JVMWrapper("JVM_NewMultiArray");
3446 JvmtiVMObjectAllocEventCollector oam;
3447 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3448 oop element_mirror = JNIHandles::resolve(eltClass);
3449 assert(dim_array->is_typeArray(), "just checking");
3450 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3451 return JNIHandles::make_local(env, result);
3452 JVM_END
3453
3454
3455 // Library support ///////////////////////////////////////////////////////////////////////////
3456
3457 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3458 //%note jvm_ct
3459 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3460 char ebuf[1024];
3461 void *load_result;
3462 {
3463 ThreadToNativeFromVM ttnfvm(thread);
3464 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3465 }
3466 if (load_result == NULL) {
3467 char msg[1024];
3468 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3469 // Since 'ebuf' may contain a string encoded using
3470 // platform encoding scheme, we need to pass
3471 // Exceptions::unsafe_to_utf8 to the new_exception method
3472 // as the last argument. See bug 6367357.
3473 Handle h_exception =
3474 Exceptions::new_exception(thread,
3475 vmSymbols::java_lang_UnsatisfiedLinkError(),
3476 msg, Exceptions::unsafe_to_utf8);
3477
3478 THROW_HANDLE_0(h_exception);
3479 }
3480 return load_result;
3481 JVM_END
3482
3483
3484 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3485 JVMWrapper("JVM_UnloadLibrary");
3486 os::dll_unload(handle);
3487 JVM_END
3488
3489
3490 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3491 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3492 return os::dll_lookup(handle, name);
3493 JVM_END
3494
3495
3496 // JNI version ///////////////////////////////////////////////////////////////////////////////
3497
3498 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3499 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3500 return Threads::is_supported_jni_version_including_1_1(version);
3501 JVM_END
3502
3503
3504 // String support ///////////////////////////////////////////////////////////////////////////
3505
3506 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3507 JVMWrapper("JVM_InternString");
3508 JvmtiVMObjectAllocEventCollector oam;
3509 if (str == NULL) return NULL;
3510 oop string = JNIHandles::resolve_non_null(str);
3511 oop result = StringTable::intern(string, CHECK_NULL);
3512 return (jstring) JNIHandles::make_local(env, result);
3513 JVM_END
3514
3515
3516 // Raw monitor support //////////////////////////////////////////////////////////////////////
3517
3518 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3519 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3520 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3521 // that only works with java threads.
3522
3523
3524 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3525 VM_Exit::block_if_vm_exited();
3526 JVMWrapper("JVM_RawMonitorCreate");
3527 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3528 }
3529
3530
3531 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3532 VM_Exit::block_if_vm_exited();
3533 JVMWrapper("JVM_RawMonitorDestroy");
3534 delete ((Mutex*) mon);
3535 }
3536
3537
3538 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3539 VM_Exit::block_if_vm_exited();
3540 JVMWrapper("JVM_RawMonitorEnter");
3541 ((Mutex*) mon)->jvm_raw_lock();
3542 return 0;
3543 }
3544
3545
3546 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3547 VM_Exit::block_if_vm_exited();
3548 JVMWrapper("JVM_RawMonitorExit");
3549 ((Mutex*) mon)->jvm_raw_unlock();
3550 }
3551
3552
3553 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3554
3555 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
3556 Handle loader, Handle protection_domain,
3557 jboolean throwError, TRAPS) {
3558 // Security Note:
3559 // The Java level wrapper will perform the necessary security check allowing
3560 // us to pass the NULL as the initiating class loader. The VM is responsible for
3561 // the checkPackageAccess relative to the initiating class loader via the
3562 // protection_domain. The protection_domain is passed as NULL by the java code
3563 // if there is no security manager in 3-arg Class.forName().
3564 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3565
3566 KlassHandle klass_handle(THREAD, klass);
3567 // Check if we should initialize the class
3568 if (init && klass_handle->oop_is_instance()) {
3569 klass_handle->initialize(CHECK_NULL);
3570 }
3571 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3572 }
3573
3574
3575 // Method ///////////////////////////////////////////////////////////////////////////////////////////
3576
3577 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
3578 JVMWrapper("JVM_InvokeMethod");
3579 Handle method_handle;
3580 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
3581 method_handle = Handle(THREAD, JNIHandles::resolve(method));
3582 Handle receiver(THREAD, JNIHandles::resolve(obj));
3583 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3584 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
3585 jobject res = JNIHandles::make_local(env, result);
3586 if (JvmtiExport::should_post_vm_object_alloc()) {
3587 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
3588 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
3589 if (java_lang_Class::is_primitive(ret_type)) {
3590 // Only for primitive type vm allocates memory for java object.
3591 // See box() method.
3592 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3593 }
3594 }
3595 return res;
3596 } else {
3597 THROW_0(vmSymbols::java_lang_StackOverflowError());
3598 }
3599 JVM_END
3600
3601
3602 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
3603 JVMWrapper("JVM_NewInstanceFromConstructor");
3604 oop constructor_mirror = JNIHandles::resolve(c);
3605 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
3606 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
3607 jobject res = JNIHandles::make_local(env, result);
3608 if (JvmtiExport::should_post_vm_object_alloc()) {
3609 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
3610 }
3611 return res;
3612 JVM_END
3613
3614 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
3615
3616 JVM_LEAF(jboolean, JVM_SupportsCX8())
3617 JVMWrapper("JVM_SupportsCX8");
3618 return VM_Version::supports_cx8();
3619 JVM_END
3620
3621 // Returns an array of all live Thread objects (VM internal JavaThreads,
3622 // jvmti agent threads, and JNI attaching threads are skipped)
3623 // See CR 6404306 regarding JNI attaching threads
3624 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
3625 ResourceMark rm(THREAD);
3626 ThreadsListEnumerator tle(THREAD, false, false);
3627 JvmtiVMObjectAllocEventCollector oam;
3628
3629 int num_threads = tle.num_threads();
3630 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
3631 objArrayHandle threads_ah(THREAD, r);
3632
3633 for (int i = 0; i < num_threads; i++) {
3634 Handle h = tle.get_threadObj(i);
3635 threads_ah->obj_at_put(i, h());
3636 }
3637
3638 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
3639 JVM_END
3640
3641
3642 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
3643 // Return StackTraceElement[][], each element is the stack trace of a thread in
3644 // the corresponding entry in the given threads array
3645 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
3646 JVMWrapper("JVM_DumpThreads");
3647 JvmtiVMObjectAllocEventCollector oam;
3648
3649 // Check if threads is null
3650 if (threads == NULL) {
3651 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
3652 }
3653
3654 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
3655 objArrayHandle ah(THREAD, a);
3656 int num_threads = ah->length();
3657 // check if threads is non-empty array
3658 if (num_threads == 0) {
3659 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3660 }
3661
3662 // check if threads is not an array of objects of Thread class
3663 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
3664 if (k != SystemDictionary::Thread_klass()) {
3665 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
3666 }
3667
3668 ResourceMark rm(THREAD);
3669
3670 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
3671 for (int i = 0; i < num_threads; i++) {
3672 oop thread_obj = ah->obj_at(i);
3673 instanceHandle h(THREAD, (instanceOop) thread_obj);
3674 thread_handle_array->append(h);
3675 }
3676
3677 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
3678 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
3679
3680 JVM_END
3681
3682 // JVM monitoring and management support
3683 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
3684 return Management::get_jmm_interface(version);
3685 JVM_END
3686
3687 // com.sun.tools.attach.VirtualMachine agent properties support
3688 //
3689 // Initialize the agent properties with the properties maintained in the VM
3690 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
3691 JVMWrapper("JVM_InitAgentProperties");
3692 ResourceMark rm;
3693
3694 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
3695
3696 PUTPROP(props, "sun.java.command", Arguments::java_command());
3697 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
3698 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
3699 return properties;
3700 JVM_END
3701
3702 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
3703 {
3704 JVMWrapper("JVM_GetEnclosingMethodInfo");
3705 JvmtiVMObjectAllocEventCollector oam;
3706
3707 if (ofClass == NULL) {
3708 return NULL;
3709 }
3710 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
3711 // Special handling for primitive objects
3712 if (java_lang_Class::is_primitive(mirror())) {
3713 return NULL;
3714 }
3715 Klass* k = java_lang_Class::as_Klass(mirror());
3716 if (!k->oop_is_instance()) {
3717 return NULL;
3718 }
3719 instanceKlassHandle ik_h(THREAD, k);
3720 int encl_method_class_idx = ik_h->enclosing_method_class_index();
3721 if (encl_method_class_idx == 0) {
3722 return NULL;
3723 }
3724 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
3725 objArrayHandle dest(THREAD, dest_o);
3726 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
3727 dest->obj_at_put(0, enc_k->java_mirror());
3728 int encl_method_method_idx = ik_h->enclosing_method_method_index();
3729 if (encl_method_method_idx != 0) {
3730 Symbol* sym = ik_h->constants()->symbol_at(
3731 extract_low_short_from_int(
3732 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3733 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3734 dest->obj_at_put(1, str());
3735 sym = ik_h->constants()->symbol_at(
3736 extract_high_short_from_int(
3737 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
3738 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
3739 dest->obj_at_put(2, str());
3740 }
3741 return (jobjectArray) JNIHandles::make_local(dest());
3742 }
3743 JVM_END
3744
3745 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
3746 {
3747 memset(info, 0, info_size);
3748
3749 info->jvm_version = Abstract_VM_Version::jvm_version();
3750 info->update_version = 0; /* 0 in HotSpot Express VM */
3751 info->special_update_version = 0; /* 0 in HotSpot Express VM */
3752
3753 // when we add a new capability in the jvm_version_info struct, we should also
3754 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
3755 // counter defined in runtimeService.cpp.
3756 info->is_attachable = AttachListener::is_attach_supported();
3757 }
3758 JVM_END