Fri, 24 Feb 2017 06:48:48 -0800
8162795: [REDO] MemberNameTable doesn't purge stale entries
Summary: Re-application of the change in JDK-8152271.
Reviewed-by: coleenp, sspitsyn
1 /*
2 * Copyright (c) 1997, 2017, 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 */
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/classLoaderExt.hpp"
28 #include "classfile/javaAssertions.hpp"
29 #include "classfile/javaClasses.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "classfile/systemDictionary.hpp"
32 #if INCLUDE_CDS
33 #include "classfile/sharedClassUtil.hpp"
34 #include "classfile/systemDictionaryShared.hpp"
35 #endif
36 #include "classfile/vmSymbols.hpp"
37 #include "gc_interface/collectedHeap.inline.hpp"
38 #include "interpreter/bytecode.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/fieldStreams.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/objArrayKlass.hpp"
44 #include "oops/method.hpp"
45 #include "prims/jvm.h"
46 #include "prims/jvm_misc.hpp"
47 #include "prims/jvmtiExport.hpp"
48 #include "prims/jvmtiThreadState.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "prims/privilegedStack.hpp"
51 #include "runtime/arguments.hpp"
52 #include "runtime/dtraceJSDT.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/jfieldIDWorkaround.hpp"
59 #include "runtime/orderAccess.inline.hpp"
60 #include "runtime/os.hpp"
61 #include "runtime/perfData.hpp"
62 #include "runtime/reflection.hpp"
63 #include "runtime/vframe.hpp"
64 #include "runtime/vm_operations.hpp"
65 #include "services/attachListener.hpp"
66 #include "services/management.hpp"
67 #include "services/threadService.hpp"
68 #include "trace/tracing.hpp"
69 #include "utilities/copy.hpp"
70 #include "utilities/defaultStream.hpp"
71 #include "utilities/dtrace.hpp"
72 #include "utilities/events.hpp"
73 #include "utilities/histogram.hpp"
74 #include "utilities/top.hpp"
75 #include "utilities/utf8.hpp"
76 #ifdef TARGET_OS_FAMILY_linux
77 # include "jvm_linux.h"
78 #endif
79 #ifdef TARGET_OS_FAMILY_solaris
80 # include "jvm_solaris.h"
81 #endif
82 #ifdef TARGET_OS_FAMILY_windows
83 # include "jvm_windows.h"
84 #endif
85 #ifdef TARGET_OS_FAMILY_aix
86 # include "jvm_aix.h"
87 #endif
88 #ifdef TARGET_OS_FAMILY_bsd
89 # include "jvm_bsd.h"
90 #endif
92 #include <errno.h>
94 #ifndef USDT2
95 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
96 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
97 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
98 #endif /* !USDT2 */
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":
107 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
108 JVMWrapper("JVM_GetClassDeclaredFields");
110 // Object address to be held directly in mirror & not visible to GC
111 oop mirror = JNIHandles::resolve_non_null(ofClass);
113 // If this ctor can hit a safepoint, moving objects around, then
114 ComplexConstructor foo;
116 // Boom! mirror may point to JUNK instead of the intended object
117 (some dereference of mirror)
119 // Here's another call that may block for GC, making mirror stale
120 MutexLocker ml(some_lock);
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);
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 */
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);
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);
150 Method* last_caller = NULL;
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 }
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 }
224 // Wrapper to trace JVM functions
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 };
240 Histogram* JVMHistogram;
241 volatile jint JVMHistogram_lock = 0;
243 class JVMHistogramElement : public HistogramElement {
244 public:
245 JVMHistogramElement(const char* name);
246 };
248 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
249 _name = elementName;
250 uintx count = 0;
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 }
262 if(JVMHistogram == NULL)
263 JVMHistogram = new Histogram("JVM Call Counts",100);
265 JVMHistogram->add_element(this);
266 Atomic::dec(&JVMHistogram_lock);
267 }
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!
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
285 // Interface version /////////////////////////////////////////////////////////////////////
288 JVM_LEAF(jint, JVM_GetInterfaceVersion())
289 return JVM_INTERFACE_VERSION;
290 JVM_END
293 // java.lang.System //////////////////////////////////////////////////////////////////////
296 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
297 JVMWrapper("JVM_CurrentTimeMillis");
298 return os::javaTimeMillis();
299 JVM_END
301 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
302 JVMWrapper("JVM_NanoTime");
303 return os::javaTimeNanos();
304 JVM_END
307 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
308 jobject dst, jint dst_pos, jint length))
309 JVMWrapper("JVM_ArrayCopy");
310 // Check if we have null pointers
311 if (src == NULL || dst == NULL) {
312 THROW(vmSymbols::java_lang_NullPointerException());
313 }
314 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
315 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
316 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
317 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
318 // Do copy
319 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
320 JVM_END
323 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
324 JavaValue r(T_OBJECT);
325 // public synchronized Object put(Object key, Object value);
326 HandleMark hm(THREAD);
327 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
328 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
329 JavaCalls::call_virtual(&r,
330 props,
331 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
332 vmSymbols::put_name(),
333 vmSymbols::object_object_object_signature(),
334 key_str,
335 value_str,
336 THREAD);
337 }
340 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
343 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
344 JVMWrapper("JVM_InitProperties");
345 ResourceMark rm;
347 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
349 // System property list includes both user set via -D option and
350 // jvm system specific properties.
351 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
352 PUTPROP(props, p->key(), p->value());
353 }
355 // Convert the -XX:MaxDirectMemorySize= command line flag
356 // to the sun.nio.MaxDirectMemorySize property.
357 // Do this after setting user properties to prevent people
358 // from setting the value with a -D option, as requested.
359 {
360 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
361 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
362 } else {
363 char as_chars[256];
364 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
365 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
366 }
367 }
369 // JVM monitoring and management support
370 // Add the sun.management.compiler property for the compiler's name
371 {
372 #undef CSIZE
373 #if defined(_LP64) || defined(_WIN64)
374 #define CSIZE "64-Bit "
375 #else
376 #define CSIZE
377 #endif // 64bit
379 #ifdef TIERED
380 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
381 #else
382 #if defined(COMPILER1)
383 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
384 #elif defined(COMPILER2)
385 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
386 #else
387 const char* compiler_name = "";
388 #endif // compilers
389 #endif // TIERED
391 if (*compiler_name != '\0' &&
392 (Arguments::mode() != Arguments::_int)) {
393 PUTPROP(props, "sun.management.compiler", compiler_name);
394 }
395 }
397 const char* enableSharedLookupCache = "false";
398 #if INCLUDE_CDS
399 if (ClassLoaderExt::is_lookup_cache_enabled()) {
400 enableSharedLookupCache = "true";
401 }
402 #endif
403 PUTPROP(props, "sun.cds.enableSharedLookupCache", enableSharedLookupCache);
405 return properties;
406 JVM_END
409 /*
410 * Return the temporary directory that the VM uses for the attach
411 * and perf data files.
412 *
413 * It is important that this directory is well-known and the
414 * same for all VM instances. It cannot be affected by configuration
415 * variables such as java.io.tmpdir.
416 */
417 JVM_ENTRY(jstring, JVM_GetTemporaryDirectory(JNIEnv *env))
418 JVMWrapper("JVM_GetTemporaryDirectory");
419 HandleMark hm(THREAD);
420 const char* temp_dir = os::get_temp_directory();
421 Handle h = java_lang_String::create_from_platform_dependent_str(temp_dir, CHECK_NULL);
422 return (jstring) JNIHandles::make_local(env, h());
423 JVM_END
426 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
428 extern volatile jint vm_created;
430 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
431 if (vm_created != 0 && (code == 0)) {
432 // The VM is about to exit. We call back into Java to check whether finalizers should be run
433 Universe::run_finalizers_on_exit();
434 }
435 before_exit(thread);
436 vm_exit(code);
437 JVM_END
440 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
441 before_exit(thread);
442 vm_exit(code);
443 JVM_END
446 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
447 register_on_exit_function(func);
448 JVM_END
451 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
452 JVMWrapper("JVM_GC");
453 if (!DisableExplicitGC) {
454 Universe::heap()->collect(GCCause::_java_lang_system_gc);
455 }
456 JVM_END
459 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
460 JVMWrapper("JVM_MaxObjectInspectionAge");
461 return Universe::heap()->millis_since_last_gc();
462 JVM_END
465 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
466 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
467 JVM_END
470 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
471 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
472 JVM_END
474 static inline jlong convert_size_t_to_jlong(size_t val) {
475 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
476 NOT_LP64 (return (jlong)val;)
477 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
478 }
480 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
481 JVMWrapper("JVM_TotalMemory");
482 size_t n = Universe::heap()->capacity();
483 return convert_size_t_to_jlong(n);
484 JVM_END
487 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
488 JVMWrapper("JVM_FreeMemory");
489 CollectedHeap* ch = Universe::heap();
490 size_t n;
491 {
492 MutexLocker x(Heap_lock);
493 n = ch->capacity() - ch->used();
494 }
495 return convert_size_t_to_jlong(n);
496 JVM_END
499 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
500 JVMWrapper("JVM_MaxMemory");
501 size_t n = Universe::heap()->max_capacity();
502 return convert_size_t_to_jlong(n);
503 JVM_END
506 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
507 JVMWrapper("JVM_ActiveProcessorCount");
508 return os::active_processor_count();
509 JVM_END
513 // java.lang.Throwable //////////////////////////////////////////////////////
516 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
517 JVMWrapper("JVM_FillInStackTrace");
518 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
519 java_lang_Throwable::fill_in_stack_trace(exception);
520 JVM_END
523 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
524 JVMWrapper("JVM_GetStackTraceDepth");
525 oop exception = JNIHandles::resolve(throwable);
526 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
527 JVM_END
530 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
531 JVMWrapper("JVM_GetStackTraceElement");
532 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
533 oop exception = JNIHandles::resolve(throwable);
534 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
535 return JNIHandles::make_local(env, element);
536 JVM_END
539 // java.lang.Object ///////////////////////////////////////////////
542 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
543 JVMWrapper("JVM_IHashCode");
544 // as implemented in the classic virtual machine; return 0 if object is NULL
545 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
546 JVM_END
549 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
550 JVMWrapper("JVM_MonitorWait");
551 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
552 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
553 if (JvmtiExport::should_post_monitor_wait()) {
554 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
556 // The current thread already owns the monitor and it has not yet
557 // been added to the wait queue so the current thread cannot be
558 // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
559 // event handler cannot accidentally consume an unpark() meant for
560 // the ParkEvent associated with this ObjectMonitor.
561 }
562 ObjectSynchronizer::wait(obj, ms, CHECK);
563 JVM_END
566 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
567 JVMWrapper("JVM_MonitorNotify");
568 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
569 ObjectSynchronizer::notify(obj, CHECK);
570 JVM_END
573 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
574 JVMWrapper("JVM_MonitorNotifyAll");
575 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
576 ObjectSynchronizer::notifyall(obj, CHECK);
577 JVM_END
580 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
581 JVMWrapper("JVM_Clone");
582 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
583 const KlassHandle klass (THREAD, obj->klass());
584 JvmtiVMObjectAllocEventCollector oam;
586 #ifdef ASSERT
587 // Just checking that the cloneable flag is set correct
588 if (obj->is_array()) {
589 guarantee(klass->is_cloneable(), "all arrays are cloneable");
590 } else {
591 guarantee(obj->is_instance(), "should be instanceOop");
592 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
593 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
594 }
595 #endif
597 // Check if class of obj supports the Cloneable interface.
598 // All arrays are considered to be cloneable (See JLS 20.1.5)
599 if (!klass->is_cloneable()) {
600 ResourceMark rm(THREAD);
601 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
602 }
604 // Make shallow object copy
605 const int size = obj->size();
606 oop new_obj_oop = NULL;
607 if (obj->is_array()) {
608 const int length = ((arrayOop)obj())->length();
609 new_obj_oop = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
610 } else {
611 new_obj_oop = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
612 }
614 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
615 // is modifying a reference field in the clonee, a non-oop-atomic copy might
616 // be suspended in the middle of copying the pointer and end up with parts
617 // of two different pointers in the field. Subsequent dereferences will crash.
618 // 4846409: an oop-copy of objects with long or double fields or arrays of same
619 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
620 // of oops. We know objects are aligned on a minimum of an jlong boundary.
621 // The same is true of StubRoutines::object_copy and the various oop_copy
622 // variants, and of the code generated by the inline_native_clone intrinsic.
623 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
624 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj_oop,
625 (size_t)align_object_size(size) / HeapWordsPerLong);
626 // Clear the header
627 new_obj_oop->init_mark();
629 // Store check (mark entire object and let gc sort it out)
630 BarrierSet* bs = Universe::heap()->barrier_set();
631 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
632 bs->write_region(MemRegion((HeapWord*)new_obj_oop, size));
634 Handle new_obj(THREAD, new_obj_oop);
635 // Special handling for MemberNames. Since they contain Method* metadata, they
636 // must be registered so that RedefineClasses can fix metadata contained in them.
637 if (java_lang_invoke_MemberName::is_instance(new_obj()) &&
638 java_lang_invoke_MemberName::is_method(new_obj())) {
639 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(new_obj());
640 // MemberName may be unresolved, so doesn't need registration until resolved.
641 if (method != NULL) {
642 methodHandle m(THREAD, method);
643 // This can safepoint and redefine method, so need both new_obj and method
644 // in a handle, for two different reasons. new_obj can move, method can be
645 // deleted if nothing is using it on the stack.
646 m->method_holder()->add_member_name(new_obj(), false);
647 }
648 }
650 // Caution: this involves a java upcall, so the clone should be
651 // "gc-robust" by this stage.
652 if (klass->has_finalizer()) {
653 assert(obj->is_instance(), "should be instanceOop");
654 new_obj_oop = InstanceKlass::register_finalizer(instanceOop(new_obj()), CHECK_NULL);
655 new_obj = Handle(THREAD, new_obj_oop);
656 }
658 return JNIHandles::make_local(env, new_obj());
659 JVM_END
661 // java.lang.Compiler ////////////////////////////////////////////////////
663 // The initial cuts of the HotSpot VM will not support JITs, and all existing
664 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
665 // functions are all silently ignored unless JVM warnings are printed.
667 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
668 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
669 JVM_END
672 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
673 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
674 return JNI_FALSE;
675 JVM_END
678 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
679 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
680 return JNI_FALSE;
681 JVM_END
684 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
685 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
686 return JNI_FALSE;
687 JVM_END
690 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
691 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
692 return NULL;
693 JVM_END
696 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
697 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
698 JVM_END
701 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
702 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
703 JVM_END
707 // Error message support //////////////////////////////////////////////////////
709 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
710 JVMWrapper("JVM_GetLastErrorString");
711 return (jint)os::lasterror(buf, len);
712 JVM_END
715 // java.io.File ///////////////////////////////////////////////////////////////
717 JVM_LEAF(char*, JVM_NativePath(char* path))
718 JVMWrapper2("JVM_NativePath (%s)", path);
719 return os::native_path(path);
720 JVM_END
723 // Misc. class handling ///////////////////////////////////////////////////////////
726 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
727 JVMWrapper("JVM_GetCallerClass");
729 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation; or
730 // sun.reflect.Reflection.getCallerClass with a depth parameter is provided
731 // temporarily for existing code to use until a replacement API is defined.
732 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL || depth != JVM_CALLER_DEPTH) {
733 Klass* k = thread->security_get_caller_class(depth);
734 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
735 }
737 // Getting the class of the caller frame.
738 //
739 // The call stack at this point looks something like this:
740 //
741 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
742 // [1] [ @CallerSensitive API.method ]
743 // [.] [ (skipped intermediate frames) ]
744 // [n] [ caller ]
745 vframeStream vfst(thread);
746 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
747 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
748 Method* m = vfst.method();
749 assert(m != NULL, "sanity");
750 switch (n) {
751 case 0:
752 // This must only be called from Reflection.getCallerClass
753 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
754 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
755 }
756 // fall-through
757 case 1:
758 // Frame 0 and 1 must be caller sensitive.
759 if (!m->caller_sensitive()) {
760 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
761 }
762 break;
763 default:
764 if (!m->is_ignored_by_security_stack_walk()) {
765 // We have reached the desired frame; return the holder class.
766 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
767 }
768 break;
769 }
770 }
771 return NULL;
772 JVM_END
775 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
776 JVMWrapper("JVM_FindPrimitiveClass");
777 oop mirror = NULL;
778 BasicType t = name2type(utf);
779 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
780 mirror = Universe::java_mirror(t);
781 }
782 if (mirror == NULL) {
783 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
784 } else {
785 return (jclass) JNIHandles::make_local(env, mirror);
786 }
787 JVM_END
790 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
791 JVMWrapper("JVM_ResolveClass");
792 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
793 JVM_END
796 JVM_ENTRY(jboolean, JVM_KnownToNotExist(JNIEnv *env, jobject loader, const char *classname))
797 JVMWrapper("JVM_KnownToNotExist");
798 #if INCLUDE_CDS
799 return ClassLoaderExt::known_to_not_exist(env, loader, classname, CHECK_(false));
800 #else
801 return false;
802 #endif
803 JVM_END
806 JVM_ENTRY(jobjectArray, JVM_GetResourceLookupCacheURLs(JNIEnv *env, jobject loader))
807 JVMWrapper("JVM_GetResourceLookupCacheURLs");
808 #if INCLUDE_CDS
809 return ClassLoaderExt::get_lookup_cache_urls(env, loader, CHECK_NULL);
810 #else
811 return NULL;
812 #endif
813 JVM_END
816 JVM_ENTRY(jintArray, JVM_GetResourceLookupCache(JNIEnv *env, jobject loader, const char *resource_name))
817 JVMWrapper("JVM_GetResourceLookupCache");
818 #if INCLUDE_CDS
819 return ClassLoaderExt::get_lookup_cache(env, loader, resource_name, CHECK_NULL);
820 #else
821 return NULL;
822 #endif
823 JVM_END
826 // Returns a class loaded by the bootstrap class loader; or null
827 // if not found. ClassNotFoundException is not thrown.
828 //
829 // Rationale behind JVM_FindClassFromBootLoader
830 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
831 // b> because of (a) java.dll has a direct dependecy on the unexported
832 // private symbol "_JVM_FindClassFromClassLoader@20".
833 // c> the launcher cannot use the private symbol as it dynamically opens
834 // the entry point, so if something changes, the launcher will fail
835 // unexpectedly at runtime, it is safest for the launcher to dlopen a
836 // stable exported interface.
837 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
838 // signature to change from _JVM_FindClassFromClassLoader@20 to
839 // JVM_FindClassFromClassLoader and will not be backward compatible
840 // with older JDKs.
841 // Thus a public/stable exported entry point is the right solution,
842 // public here means public in linker semantics, and is exported only
843 // to the JDK, and is not intended to be a public API.
845 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
846 const char* name))
847 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
849 // Java libraries should ensure that name is never null...
850 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
851 // It's impossible to create this class; the name cannot fit
852 // into the constant pool.
853 return NULL;
854 }
856 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
857 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
858 if (k == NULL) {
859 return NULL;
860 }
862 if (TraceClassResolution) {
863 trace_class_resolution(k);
864 }
865 return (jclass) JNIHandles::make_local(env, k->java_mirror());
866 JVM_END
868 // Not used; JVM_FindClassFromCaller replaces this.
869 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
870 jboolean init, jobject loader,
871 jboolean throwError))
872 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
873 throwError ? "error" : "exception");
874 // Java libraries should ensure that name is never null...
875 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
876 // It's impossible to create this class; the name cannot fit
877 // into the constant pool.
878 if (throwError) {
879 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
880 } else {
881 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
882 }
883 }
884 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
885 Handle h_loader(THREAD, JNIHandles::resolve(loader));
886 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
887 Handle(), throwError, THREAD);
889 if (TraceClassResolution && result != NULL) {
890 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
891 }
892 return result;
893 JVM_END
895 // Find a class with this name in this loader, using the caller's protection domain.
896 JVM_ENTRY(jclass, JVM_FindClassFromCaller(JNIEnv* env, const char* name,
897 jboolean init, jobject loader,
898 jclass caller))
899 JVMWrapper2("JVM_FindClassFromCaller %s throws ClassNotFoundException", name);
900 // Java libraries should ensure that name is never null...
901 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
902 // It's impossible to create this class; the name cannot fit
903 // into the constant pool.
904 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
905 }
907 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
909 oop loader_oop = JNIHandles::resolve(loader);
910 oop from_class = JNIHandles::resolve(caller);
911 oop protection_domain = NULL;
912 // If loader is null, shouldn't call ClassLoader.checkPackageAccess; otherwise get
913 // NPE. Put it in another way, the bootstrap class loader has all permission and
914 // thus no checkPackageAccess equivalence in the VM class loader.
915 // The caller is also passed as NULL by the java code if there is no security
916 // manager to avoid the performance cost of getting the calling class.
917 if (from_class != NULL && loader_oop != NULL) {
918 protection_domain = java_lang_Class::as_Klass(from_class)->protection_domain();
919 }
921 Handle h_loader(THREAD, loader_oop);
922 Handle h_prot(THREAD, protection_domain);
923 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
924 h_prot, false, THREAD);
926 if (TraceClassResolution && result != NULL) {
927 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
928 }
929 return result;
930 JVM_END
932 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
933 jboolean init, jclass from))
934 JVMWrapper2("JVM_FindClassFromClass %s", name);
935 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
936 // It's impossible to create this class; the name cannot fit
937 // into the constant pool.
938 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
939 }
940 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
941 oop from_class_oop = JNIHandles::resolve(from);
942 Klass* from_class = (from_class_oop == NULL)
943 ? (Klass*)NULL
944 : java_lang_Class::as_Klass(from_class_oop);
945 oop class_loader = NULL;
946 oop protection_domain = NULL;
947 if (from_class != NULL) {
948 class_loader = from_class->class_loader();
949 protection_domain = from_class->protection_domain();
950 }
951 Handle h_loader(THREAD, class_loader);
952 Handle h_prot (THREAD, protection_domain);
953 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
954 h_prot, true, thread);
956 if (TraceClassResolution && result != NULL) {
957 // this function is generally only used for class loading during verification.
958 ResourceMark rm;
959 oop from_mirror = JNIHandles::resolve_non_null(from);
960 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
961 const char * from_name = from_class->external_name();
963 oop mirror = JNIHandles::resolve_non_null(result);
964 Klass* to_class = java_lang_Class::as_Klass(mirror);
965 const char * to = to_class->external_name();
966 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
967 }
969 return result;
970 JVM_END
972 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
973 if (loader.is_null()) {
974 return;
975 }
977 // check whether the current caller thread holds the lock or not.
978 // If not, increment the corresponding counter
979 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
980 ObjectSynchronizer::owner_self) {
981 counter->inc();
982 }
983 }
985 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
986 // and JVM_DefineClassWithSourceCond()
987 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
988 jobject loader, const jbyte *buf,
989 jsize len, jobject pd, const char *source,
990 jboolean verify, TRAPS) {
991 if (source == NULL) source = "__JVM_DefineClass__";
993 assert(THREAD->is_Java_thread(), "must be a JavaThread");
994 JavaThread* jt = (JavaThread*) THREAD;
996 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
997 ClassLoader::perf_define_appclass_selftime(),
998 ClassLoader::perf_define_appclasses(),
999 jt->get_thread_stat()->perf_recursion_counts_addr(),
1000 jt->get_thread_stat()->perf_timers_addr(),
1001 PerfClassTraceTime::DEFINE_CLASS);
1003 if (UsePerfData) {
1004 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
1005 }
1007 // Since exceptions can be thrown, class initialization can take place
1008 // if name is NULL no check for class name in .class stream has to be made.
1009 TempNewSymbol class_name = NULL;
1010 if (name != NULL) {
1011 const int str_len = (int)strlen(name);
1012 if (str_len > Symbol::max_length()) {
1013 // It's impossible to create this class; the name cannot fit
1014 // into the constant pool.
1015 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
1016 }
1017 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
1018 }
1020 ResourceMark rm(THREAD);
1021 ClassFileStream st((u1*) buf, len, (char *)source);
1022 Handle class_loader (THREAD, JNIHandles::resolve(loader));
1023 if (UsePerfData) {
1024 is_lock_held_by_thread(class_loader,
1025 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
1026 THREAD);
1027 }
1028 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
1029 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
1030 protection_domain, &st,
1031 verify != 0,
1032 CHECK_NULL);
1034 if (TraceClassResolution && k != NULL) {
1035 trace_class_resolution(k);
1036 }
1038 return (jclass) JNIHandles::make_local(env, k->java_mirror());
1039 }
1042 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
1043 JVMWrapper2("JVM_DefineClass %s", name);
1045 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
1046 JVM_END
1049 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
1050 JVMWrapper2("JVM_DefineClassWithSource %s", name);
1052 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
1053 JVM_END
1055 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
1056 jobject loader, const jbyte *buf,
1057 jsize len, jobject pd,
1058 const char *source, jboolean verify))
1059 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
1061 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
1062 JVM_END
1064 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
1065 JVMWrapper("JVM_FindLoadedClass");
1066 ResourceMark rm(THREAD);
1068 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
1069 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
1071 const char* str = java_lang_String::as_utf8_string(string());
1072 // Sanity check, don't expect null
1073 if (str == NULL) return NULL;
1075 const int str_len = (int)strlen(str);
1076 if (str_len > Symbol::max_length()) {
1077 // It's impossible to create this class; the name cannot fit
1078 // into the constant pool.
1079 return NULL;
1080 }
1081 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
1083 // Security Note:
1084 // The Java level wrapper will perform the necessary security check allowing
1085 // us to pass the NULL as the initiating class loader.
1086 Handle h_loader(THREAD, JNIHandles::resolve(loader));
1087 if (UsePerfData) {
1088 is_lock_held_by_thread(h_loader,
1089 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
1090 THREAD);
1091 }
1093 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
1094 h_loader,
1095 Handle(),
1096 CHECK_NULL);
1097 #if INCLUDE_CDS
1098 if (k == NULL) {
1099 // If the class is not already loaded, try to see if it's in the shared
1100 // archive for the current classloader (h_loader).
1101 instanceKlassHandle ik = SystemDictionaryShared::find_or_load_shared_class(
1102 klass_name, h_loader, CHECK_NULL);
1103 k = ik();
1104 }
1105 #endif
1106 return (k == NULL) ? NULL :
1107 (jclass) JNIHandles::make_local(env, k->java_mirror());
1108 JVM_END
1111 // Reflection support //////////////////////////////////////////////////////////////////////////////
1113 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
1114 assert (cls != NULL, "illegal class");
1115 JVMWrapper("JVM_GetClassName");
1116 JvmtiVMObjectAllocEventCollector oam;
1117 ResourceMark rm(THREAD);
1118 const char* name;
1119 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1120 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
1121 } else {
1122 // Consider caching interned string in Klass
1123 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1124 assert(k->is_klass(), "just checking");
1125 name = k->external_name();
1126 }
1127 oop result = StringTable::intern((char*) name, CHECK_NULL);
1128 return (jstring) JNIHandles::make_local(env, result);
1129 JVM_END
1132 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1133 JVMWrapper("JVM_GetClassInterfaces");
1134 JvmtiVMObjectAllocEventCollector oam;
1135 oop mirror = JNIHandles::resolve_non_null(cls);
1137 // Special handling for primitive objects
1138 if (java_lang_Class::is_primitive(mirror)) {
1139 // Primitive objects does not have any interfaces
1140 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1141 return (jobjectArray) JNIHandles::make_local(env, r);
1142 }
1144 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1145 // Figure size of result array
1146 int size;
1147 if (klass->oop_is_instance()) {
1148 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1149 } else {
1150 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1151 size = 2;
1152 }
1154 // Allocate result array
1155 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1156 objArrayHandle result (THREAD, r);
1157 // Fill in result
1158 if (klass->oop_is_instance()) {
1159 // Regular instance klass, fill in all local interfaces
1160 for (int index = 0; index < size; index++) {
1161 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1162 result->obj_at_put(index, k->java_mirror());
1163 }
1164 } else {
1165 // All arrays implement java.lang.Cloneable and java.io.Serializable
1166 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1167 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1168 }
1169 return (jobjectArray) JNIHandles::make_local(env, result());
1170 JVM_END
1173 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1174 JVMWrapper("JVM_GetClassLoader");
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1176 return NULL;
1177 }
1178 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1179 oop loader = k->class_loader();
1180 return JNIHandles::make_local(env, loader);
1181 JVM_END
1184 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1185 JVMWrapper("JVM_IsInterface");
1186 oop mirror = JNIHandles::resolve_non_null(cls);
1187 if (java_lang_Class::is_primitive(mirror)) {
1188 return JNI_FALSE;
1189 }
1190 Klass* k = java_lang_Class::as_Klass(mirror);
1191 jboolean result = k->is_interface();
1192 assert(!result || k->oop_is_instance(),
1193 "all interfaces are instance types");
1194 // The compiler intrinsic for isInterface tests the
1195 // Klass::_access_flags bits in the same way.
1196 return result;
1197 JVM_END
1200 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1201 JVMWrapper("JVM_GetClassSigners");
1202 JvmtiVMObjectAllocEventCollector oam;
1203 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1204 // There are no signers for primitive types
1205 return NULL;
1206 }
1208 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1210 // If there are no signers set in the class, or if the class
1211 // is an array, return NULL.
1212 if (signers == NULL) return NULL;
1214 // copy of the signers array
1215 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1216 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1217 for (int index = 0; index < signers->length(); index++) {
1218 signers_copy->obj_at_put(index, signers->obj_at(index));
1219 }
1221 // return the copy
1222 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1223 JVM_END
1226 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1227 JVMWrapper("JVM_SetClassSigners");
1228 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1229 // This call is ignored for primitive types and arrays.
1230 // Signers are only set once, ClassLoader.java, and thus shouldn't
1231 // be called with an array. Only the bootstrap loader creates arrays.
1232 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1233 if (k->oop_is_instance()) {
1234 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1235 }
1236 }
1237 JVM_END
1240 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1241 JVMWrapper("JVM_GetProtectionDomain");
1242 if (JNIHandles::resolve(cls) == NULL) {
1243 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1244 }
1246 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1247 // Primitive types does not have a protection domain.
1248 return NULL;
1249 }
1251 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1252 return (jobject) JNIHandles::make_local(env, pd);
1253 JVM_END
1256 static bool is_authorized(Handle context, instanceKlassHandle klass, TRAPS) {
1257 // If there is a security manager and protection domain, check the access
1258 // in the protection domain, otherwise it is authorized.
1259 if (java_lang_System::has_security_manager()) {
1261 // For bootstrapping, if pd implies method isn't in the JDK, allow
1262 // this context to revert to older behavior.
1263 // In this case the isAuthorized field in AccessControlContext is also not
1264 // present.
1265 if (Universe::protection_domain_implies_method() == NULL) {
1266 return true;
1267 }
1269 // Whitelist certain access control contexts
1270 if (java_security_AccessControlContext::is_authorized(context)) {
1271 return true;
1272 }
1274 oop prot = klass->protection_domain();
1275 if (prot != NULL) {
1276 // Call pd.implies(new SecurityPermission("createAccessControlContext"))
1277 // in the new wrapper.
1278 methodHandle m(THREAD, Universe::protection_domain_implies_method());
1279 Handle h_prot(THREAD, prot);
1280 JavaValue result(T_BOOLEAN);
1281 JavaCallArguments args(h_prot);
1282 JavaCalls::call(&result, m, &args, CHECK_false);
1283 return (result.get_jboolean() != 0);
1284 }
1285 }
1286 return true;
1287 }
1289 // Create an AccessControlContext with a protection domain with null codesource
1290 // and null permissions - which gives no permissions.
1291 oop create_dummy_access_control_context(TRAPS) {
1292 InstanceKlass* pd_klass = InstanceKlass::cast(SystemDictionary::ProtectionDomain_klass());
1293 Handle obj = pd_klass->allocate_instance_handle(CHECK_NULL);
1294 // Call constructor ProtectionDomain(null, null);
1295 JavaValue result(T_VOID);
1296 JavaCalls::call_special(&result, obj, KlassHandle(THREAD, pd_klass),
1297 vmSymbols::object_initializer_name(),
1298 vmSymbols::codesource_permissioncollection_signature(),
1299 Handle(), Handle(), CHECK_NULL);
1301 // new ProtectionDomain[] {pd};
1302 objArrayOop context = oopFactory::new_objArray(pd_klass, 1, CHECK_NULL);
1303 context->obj_at_put(0, obj());
1305 // new AccessControlContext(new ProtectionDomain[] {pd})
1306 objArrayHandle h_context(THREAD, context);
1307 oop acc = java_security_AccessControlContext::create(h_context, false, Handle(), CHECK_NULL);
1308 return acc;
1309 }
1311 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1312 JVMWrapper("JVM_DoPrivileged");
1314 if (action == NULL) {
1315 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1316 }
1318 // Compute the frame initiating the do privileged operation and setup the privileged stack
1319 vframeStream vfst(thread);
1320 vfst.security_get_caller_frame(1);
1322 if (vfst.at_end()) {
1323 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "no caller?");
1324 }
1326 Method* method = vfst.method();
1327 instanceKlassHandle klass (THREAD, method->method_holder());
1329 // Check that action object understands "Object run()"
1330 Handle h_context;
1331 if (context != NULL) {
1332 h_context = Handle(THREAD, JNIHandles::resolve(context));
1333 bool authorized = is_authorized(h_context, klass, CHECK_NULL);
1334 if (!authorized) {
1335 // Create an unprivileged access control object and call it's run function
1336 // instead.
1337 oop noprivs = create_dummy_access_control_context(CHECK_NULL);
1338 h_context = Handle(THREAD, noprivs);
1339 }
1340 }
1342 // Check that action object understands "Object run()"
1343 Handle object (THREAD, JNIHandles::resolve(action));
1345 // get run() method
1346 Method* m_oop = object->klass()->uncached_lookup_method(
1347 vmSymbols::run_method_name(),
1348 vmSymbols::void_object_signature(),
1349 Klass::find_overpass);
1350 methodHandle m (THREAD, m_oop);
1351 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1352 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1353 }
1355 // Stack allocated list of privileged stack elements
1356 PrivilegedElement pi;
1357 if (!vfst.at_end()) {
1358 pi.initialize(&vfst, h_context(), thread->privileged_stack_top(), CHECK_NULL);
1359 thread->set_privileged_stack_top(&pi);
1360 }
1363 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1364 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1365 Handle pending_exception;
1366 JavaValue result(T_OBJECT);
1367 JavaCallArguments args(object);
1368 JavaCalls::call(&result, m, &args, THREAD);
1370 // done with action, remove ourselves from the list
1371 if (!vfst.at_end()) {
1372 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1373 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1374 }
1376 if (HAS_PENDING_EXCEPTION) {
1377 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1378 CLEAR_PENDING_EXCEPTION;
1379 // JVMTI has already reported the pending exception
1380 // JVMTI internal flag reset is needed in order to report PrivilegedActionException
1381 if (THREAD->is_Java_thread()) {
1382 JvmtiExport::clear_detected_exception((JavaThread*) THREAD);
1383 }
1384 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1385 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1386 // Throw a java.security.PrivilegedActionException(Exception e) exception
1387 JavaCallArguments args(pending_exception);
1388 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1389 vmSymbols::exception_void_signature(),
1390 &args);
1391 }
1392 }
1394 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1395 return JNIHandles::make_local(env, (oop) result.get_jobject());
1396 JVM_END
1399 // Returns the inherited_access_control_context field of the running thread.
1400 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1401 JVMWrapper("JVM_GetInheritedAccessControlContext");
1402 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1403 return JNIHandles::make_local(env, result);
1404 JVM_END
1406 class RegisterArrayForGC {
1407 private:
1408 JavaThread *_thread;
1409 public:
1410 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1411 _thread = thread;
1412 _thread->register_array_for_gc(array);
1413 }
1415 ~RegisterArrayForGC() {
1416 _thread->register_array_for_gc(NULL);
1417 }
1418 };
1421 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1422 JVMWrapper("JVM_GetStackAccessControlContext");
1423 if (!UsePrivilegedStack) return NULL;
1425 ResourceMark rm(THREAD);
1426 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1427 JvmtiVMObjectAllocEventCollector oam;
1429 // count the protection domains on the execution stack. We collapse
1430 // duplicate consecutive protection domains into a single one, as
1431 // well as stopping when we hit a privileged frame.
1433 // Use vframeStream to iterate through Java frames
1434 vframeStream vfst(thread);
1436 oop previous_protection_domain = NULL;
1437 Handle privileged_context(thread, NULL);
1438 bool is_privileged = false;
1439 oop protection_domain = NULL;
1441 for(; !vfst.at_end(); vfst.next()) {
1442 // get method of frame
1443 Method* method = vfst.method();
1444 intptr_t* frame_id = vfst.frame_id();
1446 // check the privileged frames to see if we have a match
1447 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1448 // this frame is privileged
1449 is_privileged = true;
1450 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1451 protection_domain = thread->privileged_stack_top()->protection_domain();
1452 } else {
1453 protection_domain = method->method_holder()->protection_domain();
1454 }
1456 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1457 local_array->push(protection_domain);
1458 previous_protection_domain = protection_domain;
1459 }
1461 if (is_privileged) break;
1462 }
1465 // either all the domains on the stack were system domains, or
1466 // we had a privileged system domain
1467 if (local_array->is_empty()) {
1468 if (is_privileged && privileged_context.is_null()) return NULL;
1470 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1471 return JNIHandles::make_local(env, result);
1472 }
1474 // the resource area must be registered in case of a gc
1475 RegisterArrayForGC ragc(thread, local_array);
1476 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1477 local_array->length(), CHECK_NULL);
1478 objArrayHandle h_context(thread, context);
1479 for (int index = 0; index < local_array->length(); index++) {
1480 h_context->obj_at_put(index, local_array->at(index));
1481 }
1483 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1485 return JNIHandles::make_local(env, result);
1486 JVM_END
1489 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1490 JVMWrapper("JVM_IsArrayClass");
1491 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1492 return (k != NULL) && k->oop_is_array() ? true : false;
1493 JVM_END
1496 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1497 JVMWrapper("JVM_IsPrimitiveClass");
1498 oop mirror = JNIHandles::resolve_non_null(cls);
1499 return (jboolean) java_lang_Class::is_primitive(mirror);
1500 JVM_END
1503 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1504 JVMWrapper("JVM_GetComponentType");
1505 oop mirror = JNIHandles::resolve_non_null(cls);
1506 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1507 return (jclass) JNIHandles::make_local(env, result);
1508 JVM_END
1511 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1512 JVMWrapper("JVM_GetClassModifiers");
1513 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1514 // Primitive type
1515 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1516 }
1518 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1519 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1520 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1521 return k->modifier_flags();
1522 JVM_END
1525 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1527 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1528 JvmtiVMObjectAllocEventCollector oam;
1529 // ofClass is a reference to a java_lang_Class object. The mirror object
1530 // of an InstanceKlass
1532 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1533 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1534 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1535 return (jobjectArray)JNIHandles::make_local(env, result);
1536 }
1538 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1539 InnerClassesIterator iter(k);
1541 if (iter.length() == 0) {
1542 // Neither an inner nor outer class
1543 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1544 return (jobjectArray)JNIHandles::make_local(env, result);
1545 }
1547 // find inner class info
1548 constantPoolHandle cp(thread, k->constants());
1549 int length = iter.length();
1551 // Allocate temp. result array
1552 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1553 objArrayHandle result (THREAD, r);
1554 int members = 0;
1556 for (; !iter.done(); iter.next()) {
1557 int ioff = iter.inner_class_info_index();
1558 int ooff = iter.outer_class_info_index();
1560 if (ioff != 0 && ooff != 0) {
1561 // Check to see if the name matches the class we're looking for
1562 // before attempting to find the class.
1563 if (cp->klass_name_at_matches(k, ooff)) {
1564 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1565 if (outer_klass == k()) {
1566 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1567 instanceKlassHandle inner_klass (THREAD, ik);
1569 // Throws an exception if outer klass has not declared k as
1570 // an inner klass
1571 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1573 result->obj_at_put(members, inner_klass->java_mirror());
1574 members++;
1575 }
1576 }
1577 }
1578 }
1580 if (members != length) {
1581 // Return array of right length
1582 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1583 for(int i = 0; i < members; i++) {
1584 res->obj_at_put(i, result->obj_at(i));
1585 }
1586 return (jobjectArray)JNIHandles::make_local(env, res);
1587 }
1589 return (jobjectArray)JNIHandles::make_local(env, result());
1590 JVM_END
1593 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1594 {
1595 // ofClass is a reference to a java_lang_Class object.
1596 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1597 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1598 return NULL;
1599 }
1601 bool inner_is_member = false;
1602 Klass* outer_klass
1603 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1604 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1605 if (outer_klass == NULL) return NULL; // already a top-level class
1606 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1607 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1608 }
1609 JVM_END
1611 // should be in InstanceKlass.cpp, but is here for historical reasons
1612 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1613 bool* inner_is_member,
1614 TRAPS) {
1615 Thread* thread = THREAD;
1616 InnerClassesIterator iter(k);
1617 if (iter.length() == 0) {
1618 // No inner class info => no declaring class
1619 return NULL;
1620 }
1622 constantPoolHandle i_cp(thread, k->constants());
1624 bool found = false;
1625 Klass* ok;
1626 instanceKlassHandle outer_klass;
1627 *inner_is_member = false;
1629 // Find inner_klass attribute
1630 for (; !iter.done() && !found; iter.next()) {
1631 int ioff = iter.inner_class_info_index();
1632 int ooff = iter.outer_class_info_index();
1633 int noff = iter.inner_name_index();
1634 if (ioff != 0) {
1635 // Check to see if the name matches the class we're looking for
1636 // before attempting to find the class.
1637 if (i_cp->klass_name_at_matches(k, ioff)) {
1638 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1639 found = (k() == inner_klass);
1640 if (found && ooff != 0) {
1641 ok = i_cp->klass_at(ooff, CHECK_NULL);
1642 outer_klass = instanceKlassHandle(thread, ok);
1643 *inner_is_member = true;
1644 }
1645 }
1646 }
1647 }
1649 if (found && outer_klass.is_null()) {
1650 // It may be anonymous; try for that.
1651 int encl_method_class_idx = k->enclosing_method_class_index();
1652 if (encl_method_class_idx != 0) {
1653 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1654 outer_klass = instanceKlassHandle(thread, ok);
1655 *inner_is_member = false;
1656 }
1657 }
1659 // If no inner class attribute found for this class.
1660 if (outer_klass.is_null()) return NULL;
1662 // Throws an exception if outer klass has not declared k as an inner klass
1663 // We need evidence that each klass knows about the other, or else
1664 // the system could allow a spoof of an inner class to gain access rights.
1665 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1666 return outer_klass();
1667 }
1669 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1670 assert (cls != NULL, "illegal class");
1671 JVMWrapper("JVM_GetClassSignature");
1672 JvmtiVMObjectAllocEventCollector oam;
1673 ResourceMark rm(THREAD);
1674 // Return null for arrays and primatives
1675 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1676 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1677 if (k->oop_is_instance()) {
1678 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1679 if (sym == NULL) return NULL;
1680 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1681 return (jstring) JNIHandles::make_local(env, str());
1682 }
1683 }
1684 return NULL;
1685 JVM_END
1688 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1689 assert (cls != NULL, "illegal class");
1690 JVMWrapper("JVM_GetClassAnnotations");
1692 // Return null for arrays and primitives
1693 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1694 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1695 if (k->oop_is_instance()) {
1696 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1697 return (jbyteArray) JNIHandles::make_local(env, a);
1698 }
1699 }
1700 return NULL;
1701 JVM_END
1704 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1705 // some of this code was adapted from from jni_FromReflectedField
1707 oop reflected = JNIHandles::resolve_non_null(field);
1708 oop mirror = java_lang_reflect_Field::clazz(reflected);
1709 Klass* k = java_lang_Class::as_Klass(mirror);
1710 int slot = java_lang_reflect_Field::slot(reflected);
1711 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1713 KlassHandle kh(THREAD, k);
1714 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1716 if (modifiers & JVM_ACC_STATIC) {
1717 // for static fields we only look in the current class
1718 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1719 assert(false, "cannot find static field");
1720 return false;
1721 }
1722 } else {
1723 // for instance fields we start with the current class and work
1724 // our way up through the superclass chain
1725 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1726 assert(false, "cannot find instance field");
1727 return false;
1728 }
1729 }
1730 return true;
1731 }
1733 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1734 // field is a handle to a java.lang.reflect.Field object
1735 assert(field != NULL, "illegal field");
1736 JVMWrapper("JVM_GetFieldAnnotations");
1738 fieldDescriptor fd;
1739 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1740 if (!gotFd) {
1741 return NULL;
1742 }
1744 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1745 JVM_END
1748 static Method* jvm_get_method_common(jobject method) {
1749 // some of this code was adapted from from jni_FromReflectedMethod
1751 oop reflected = JNIHandles::resolve_non_null(method);
1752 oop mirror = NULL;
1753 int slot = 0;
1755 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1756 mirror = java_lang_reflect_Constructor::clazz(reflected);
1757 slot = java_lang_reflect_Constructor::slot(reflected);
1758 } else {
1759 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1760 "wrong type");
1761 mirror = java_lang_reflect_Method::clazz(reflected);
1762 slot = java_lang_reflect_Method::slot(reflected);
1763 }
1764 Klass* k = java_lang_Class::as_Klass(mirror);
1766 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1767 assert(m != NULL, "cannot find method");
1768 return m; // caller has to deal with NULL in product mode
1769 }
1772 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1773 JVMWrapper("JVM_GetMethodAnnotations");
1775 // method is a handle to a java.lang.reflect.Method object
1776 Method* m = jvm_get_method_common(method);
1777 if (m == NULL) {
1778 return NULL;
1779 }
1781 return (jbyteArray) JNIHandles::make_local(env,
1782 Annotations::make_java_array(m->annotations(), THREAD));
1783 JVM_END
1786 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1787 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1789 // method is a handle to a java.lang.reflect.Method object
1790 Method* m = jvm_get_method_common(method);
1791 if (m == NULL) {
1792 return NULL;
1793 }
1795 return (jbyteArray) JNIHandles::make_local(env,
1796 Annotations::make_java_array(m->annotation_default(), THREAD));
1797 JVM_END
1800 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1801 JVMWrapper("JVM_GetMethodParameterAnnotations");
1803 // method is a handle to a java.lang.reflect.Method object
1804 Method* m = jvm_get_method_common(method);
1805 if (m == NULL) {
1806 return NULL;
1807 }
1809 return (jbyteArray) JNIHandles::make_local(env,
1810 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1811 JVM_END
1813 /* Type use annotations support (JDK 1.8) */
1815 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1816 assert (cls != NULL, "illegal class");
1817 JVMWrapper("JVM_GetClassTypeAnnotations");
1818 ResourceMark rm(THREAD);
1819 // Return null for arrays and primitives
1820 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1821 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1822 if (k->oop_is_instance()) {
1823 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1824 if (type_annotations != NULL) {
1825 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1826 return (jbyteArray) JNIHandles::make_local(env, a);
1827 }
1828 }
1829 }
1830 return NULL;
1831 JVM_END
1833 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1834 assert (method != NULL, "illegal method");
1835 JVMWrapper("JVM_GetMethodTypeAnnotations");
1837 // method is a handle to a java.lang.reflect.Method object
1838 Method* m = jvm_get_method_common(method);
1839 if (m == NULL) {
1840 return NULL;
1841 }
1843 AnnotationArray* type_annotations = m->type_annotations();
1844 if (type_annotations != NULL) {
1845 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1846 return (jbyteArray) JNIHandles::make_local(env, a);
1847 }
1849 return NULL;
1850 JVM_END
1852 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1853 assert (field != NULL, "illegal field");
1854 JVMWrapper("JVM_GetFieldTypeAnnotations");
1856 fieldDescriptor fd;
1857 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1858 if (!gotFd) {
1859 return NULL;
1860 }
1862 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1863 JVM_END
1865 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1866 if (!cp->is_within_bounds(index)) {
1867 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1868 }
1869 }
1871 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1872 {
1873 JVMWrapper("JVM_GetMethodParameters");
1874 // method is a handle to a java.lang.reflect.Method object
1875 Method* method_ptr = jvm_get_method_common(method);
1876 methodHandle mh (THREAD, method_ptr);
1877 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1878 const int num_params = mh->method_parameters_length();
1880 if (0 != num_params) {
1881 // make sure all the symbols are properly formatted
1882 for (int i = 0; i < num_params; i++) {
1883 MethodParametersElement* params = mh->method_parameters_start();
1884 int index = params[i].name_cp_index;
1885 bounds_check(mh->constants(), index, CHECK_NULL);
1887 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1888 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1889 "Wrong type at constant pool index");
1890 }
1892 }
1894 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1895 objArrayHandle result (THREAD, result_oop);
1897 for (int i = 0; i < num_params; i++) {
1898 MethodParametersElement* params = mh->method_parameters_start();
1899 // For a 0 index, give a NULL symbol
1900 Symbol* sym = 0 != params[i].name_cp_index ?
1901 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1902 int flags = params[i].flags;
1903 oop param = Reflection::new_parameter(reflected_method, i, sym,
1904 flags, CHECK_NULL);
1905 result->obj_at_put(i, param);
1906 }
1907 return (jobjectArray)JNIHandles::make_local(env, result());
1908 } else {
1909 return (jobjectArray)NULL;
1910 }
1911 }
1912 JVM_END
1914 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1916 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1917 {
1918 JVMWrapper("JVM_GetClassDeclaredFields");
1919 JvmtiVMObjectAllocEventCollector oam;
1921 // Exclude primitive types and array types
1922 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1923 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1924 // Return empty array
1925 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1926 return (jobjectArray) JNIHandles::make_local(env, res);
1927 }
1929 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1930 constantPoolHandle cp(THREAD, k->constants());
1932 // Ensure class is linked
1933 k->link_class(CHECK_NULL);
1935 // 4496456 We need to filter out java.lang.Throwable.backtrace
1936 bool skip_backtrace = false;
1938 // Allocate result
1939 int num_fields;
1941 if (publicOnly) {
1942 num_fields = 0;
1943 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1944 if (fs.access_flags().is_public()) ++num_fields;
1945 }
1946 } else {
1947 num_fields = k->java_fields_count();
1949 if (k() == SystemDictionary::Throwable_klass()) {
1950 num_fields--;
1951 skip_backtrace = true;
1952 }
1953 }
1955 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1956 objArrayHandle result (THREAD, r);
1958 int out_idx = 0;
1959 fieldDescriptor fd;
1960 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1961 if (skip_backtrace) {
1962 // 4496456 skip java.lang.Throwable.backtrace
1963 int offset = fs.offset();
1964 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1965 }
1967 if (!publicOnly || fs.access_flags().is_public()) {
1968 fd.reinitialize(k(), fs.index());
1969 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1970 result->obj_at_put(out_idx, field);
1971 ++out_idx;
1972 }
1973 }
1974 assert(out_idx == num_fields, "just checking");
1975 return (jobjectArray) JNIHandles::make_local(env, result());
1976 }
1977 JVM_END
1979 static bool select_method(methodHandle method, bool want_constructor) {
1980 if (want_constructor) {
1981 return (method->is_initializer() && !method->is_static());
1982 } else {
1983 return (!method->is_initializer() && !method->is_overpass());
1984 }
1985 }
1987 static jobjectArray get_class_declared_methods_helper(
1988 JNIEnv *env,
1989 jclass ofClass, jboolean publicOnly,
1990 bool want_constructor,
1991 Klass* klass, TRAPS) {
1993 JvmtiVMObjectAllocEventCollector oam;
1995 // Exclude primitive types and array types
1996 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1997 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1998 // Return empty array
1999 oop res = oopFactory::new_objArray(klass, 0, CHECK_NULL);
2000 return (jobjectArray) JNIHandles::make_local(env, res);
2001 }
2003 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
2005 // Ensure class is linked
2006 k->link_class(CHECK_NULL);
2008 Array<Method*>* methods = k->methods();
2009 int methods_length = methods->length();
2011 // Save original method_idnum in case of redefinition, which can change
2012 // the idnum of obsolete methods. The new method will have the same idnum
2013 // but if we refresh the methods array, the counts will be wrong.
2014 ResourceMark rm(THREAD);
2015 GrowableArray<int>* idnums = new GrowableArray<int>(methods_length);
2016 int num_methods = 0;
2018 for (int i = 0; i < methods_length; i++) {
2019 methodHandle method(THREAD, methods->at(i));
2020 if (select_method(method, want_constructor)) {
2021 if (!publicOnly || method->is_public()) {
2022 idnums->push(method->method_idnum());
2023 ++num_methods;
2024 }
2025 }
2026 }
2028 // Allocate result
2029 objArrayOop r = oopFactory::new_objArray(klass, num_methods, CHECK_NULL);
2030 objArrayHandle result (THREAD, r);
2032 // Now just put the methods that we selected above, but go by their idnum
2033 // in case of redefinition. The methods can be redefined at any safepoint,
2034 // so above when allocating the oop array and below when creating reflect
2035 // objects.
2036 for (int i = 0; i < num_methods; i++) {
2037 methodHandle method(THREAD, k->method_with_idnum(idnums->at(i)));
2038 if (method.is_null()) {
2039 // Method may have been deleted and seems this API can handle null
2040 // Otherwise should probably put a method that throws NSME
2041 result->obj_at_put(i, NULL);
2042 } else {
2043 oop m;
2044 if (want_constructor) {
2045 m = Reflection::new_constructor(method, CHECK_NULL);
2046 } else {
2047 m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
2048 }
2049 result->obj_at_put(i, m);
2050 }
2051 }
2053 return (jobjectArray) JNIHandles::make_local(env, result());
2054 }
2056 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2057 {
2058 JVMWrapper("JVM_GetClassDeclaredMethods");
2059 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2060 /*want_constructor*/ false,
2061 SystemDictionary::reflect_Method_klass(), THREAD);
2062 }
2063 JVM_END
2065 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
2066 {
2067 JVMWrapper("JVM_GetClassDeclaredConstructors");
2068 return get_class_declared_methods_helper(env, ofClass, publicOnly,
2069 /*want_constructor*/ true,
2070 SystemDictionary::reflect_Constructor_klass(), THREAD);
2071 }
2072 JVM_END
2074 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
2075 {
2076 JVMWrapper("JVM_GetClassAccessFlags");
2077 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2078 // Primitive type
2079 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
2080 }
2082 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2083 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
2084 }
2085 JVM_END
2088 // Constant pool access //////////////////////////////////////////////////////////
2090 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
2091 {
2092 JVMWrapper("JVM_GetClassConstantPool");
2093 JvmtiVMObjectAllocEventCollector oam;
2095 // Return null for primitives and arrays
2096 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
2097 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2098 if (k->oop_is_instance()) {
2099 instanceKlassHandle k_h(THREAD, k);
2100 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
2101 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
2102 return JNIHandles::make_local(jcp());
2103 }
2104 }
2105 return NULL;
2106 }
2107 JVM_END
2110 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
2111 {
2112 JVMWrapper("JVM_ConstantPoolGetSize");
2113 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2114 return cp->length();
2115 }
2116 JVM_END
2119 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2120 {
2121 JVMWrapper("JVM_ConstantPoolGetClassAt");
2122 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2123 bounds_check(cp, index, CHECK_NULL);
2124 constantTag tag = cp->tag_at(index);
2125 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2126 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2127 }
2128 Klass* k = cp->klass_at(index, CHECK_NULL);
2129 return (jclass) JNIHandles::make_local(k->java_mirror());
2130 }
2131 JVM_END
2133 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2134 {
2135 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2137 bounds_check(cp, index, CHECK_NULL);
2138 constantTag tag = cp->tag_at(index);
2139 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2141 }
2142 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
2143 if (k == NULL) return NULL;
2144 return (jclass) JNIHandles::make_local(k->java_mirror());
2145 }
2146 JVM_END
2148 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2149 constantTag tag = cp->tag_at(index);
2150 if (!tag.is_method() && !tag.is_interface_method()) {
2151 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2152 }
2153 int klass_ref = cp->uncached_klass_ref_index_at(index);
2154 Klass* k_o;
2155 if (force_resolution) {
2156 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2157 } else {
2158 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2159 if (k_o == NULL) return NULL;
2160 }
2161 instanceKlassHandle k(THREAD, k_o);
2162 Symbol* name = cp->uncached_name_ref_at(index);
2163 Symbol* sig = cp->uncached_signature_ref_at(index);
2164 methodHandle m (THREAD, k->find_method(name, sig));
2165 if (m.is_null()) {
2166 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
2167 }
2168 oop method;
2169 if (!m->is_initializer() || m->is_static()) {
2170 method = Reflection::new_method(m, true, true, CHECK_NULL);
2171 } else {
2172 method = Reflection::new_constructor(m, CHECK_NULL);
2173 }
2174 return JNIHandles::make_local(method);
2175 }
2177 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2178 {
2179 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2180 JvmtiVMObjectAllocEventCollector oam;
2181 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2182 bounds_check(cp, index, CHECK_NULL);
2183 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2184 return res;
2185 }
2186 JVM_END
2188 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2189 {
2190 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2191 JvmtiVMObjectAllocEventCollector oam;
2192 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2193 bounds_check(cp, index, CHECK_NULL);
2194 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2195 return res;
2196 }
2197 JVM_END
2199 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2200 constantTag tag = cp->tag_at(index);
2201 if (!tag.is_field()) {
2202 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2203 }
2204 int klass_ref = cp->uncached_klass_ref_index_at(index);
2205 Klass* k_o;
2206 if (force_resolution) {
2207 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2208 } else {
2209 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2210 if (k_o == NULL) return NULL;
2211 }
2212 instanceKlassHandle k(THREAD, k_o);
2213 Symbol* name = cp->uncached_name_ref_at(index);
2214 Symbol* sig = cp->uncached_signature_ref_at(index);
2215 fieldDescriptor fd;
2216 Klass* target_klass = k->find_field(name, sig, &fd);
2217 if (target_klass == NULL) {
2218 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2219 }
2220 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2221 return JNIHandles::make_local(field);
2222 }
2224 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2225 {
2226 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2227 JvmtiVMObjectAllocEventCollector oam;
2228 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2229 bounds_check(cp, index, CHECK_NULL);
2230 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2231 return res;
2232 }
2233 JVM_END
2235 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2236 {
2237 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2238 JvmtiVMObjectAllocEventCollector oam;
2239 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2240 bounds_check(cp, index, CHECK_NULL);
2241 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2242 return res;
2243 }
2244 JVM_END
2246 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2247 {
2248 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2249 JvmtiVMObjectAllocEventCollector oam;
2250 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2251 bounds_check(cp, index, CHECK_NULL);
2252 constantTag tag = cp->tag_at(index);
2253 if (!tag.is_field_or_method()) {
2254 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2255 }
2256 int klass_ref = cp->uncached_klass_ref_index_at(index);
2257 Symbol* klass_name = cp->klass_name_at(klass_ref);
2258 Symbol* member_name = cp->uncached_name_ref_at(index);
2259 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2260 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2261 objArrayHandle dest(THREAD, dest_o);
2262 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2263 dest->obj_at_put(0, str());
2264 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2265 dest->obj_at_put(1, str());
2266 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2267 dest->obj_at_put(2, str());
2268 return (jobjectArray) JNIHandles::make_local(dest());
2269 }
2270 JVM_END
2272 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2273 {
2274 JVMWrapper("JVM_ConstantPoolGetIntAt");
2275 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2276 bounds_check(cp, index, CHECK_0);
2277 constantTag tag = cp->tag_at(index);
2278 if (!tag.is_int()) {
2279 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2280 }
2281 return cp->int_at(index);
2282 }
2283 JVM_END
2285 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2286 {
2287 JVMWrapper("JVM_ConstantPoolGetLongAt");
2288 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2289 bounds_check(cp, index, CHECK_(0L));
2290 constantTag tag = cp->tag_at(index);
2291 if (!tag.is_long()) {
2292 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2293 }
2294 return cp->long_at(index);
2295 }
2296 JVM_END
2298 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2299 {
2300 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2301 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2302 bounds_check(cp, index, CHECK_(0.0f));
2303 constantTag tag = cp->tag_at(index);
2304 if (!tag.is_float()) {
2305 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2306 }
2307 return cp->float_at(index);
2308 }
2309 JVM_END
2311 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2312 {
2313 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2314 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2315 bounds_check(cp, index, CHECK_(0.0));
2316 constantTag tag = cp->tag_at(index);
2317 if (!tag.is_double()) {
2318 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2319 }
2320 return cp->double_at(index);
2321 }
2322 JVM_END
2324 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2325 {
2326 JVMWrapper("JVM_ConstantPoolGetStringAt");
2327 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2328 bounds_check(cp, index, CHECK_NULL);
2329 constantTag tag = cp->tag_at(index);
2330 if (!tag.is_string()) {
2331 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2332 }
2333 oop str = cp->string_at(index, CHECK_NULL);
2334 return (jstring) JNIHandles::make_local(str);
2335 }
2336 JVM_END
2338 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2339 {
2340 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2341 JvmtiVMObjectAllocEventCollector oam;
2342 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2343 bounds_check(cp, index, CHECK_NULL);
2344 constantTag tag = cp->tag_at(index);
2345 if (!tag.is_symbol()) {
2346 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2347 }
2348 Symbol* sym = cp->symbol_at(index);
2349 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2350 return (jstring) JNIHandles::make_local(str());
2351 }
2352 JVM_END
2355 // Assertion support. //////////////////////////////////////////////////////////
2357 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2358 JVMWrapper("JVM_DesiredAssertionStatus");
2359 assert(cls != NULL, "bad class");
2361 oop r = JNIHandles::resolve(cls);
2362 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2363 if (java_lang_Class::is_primitive(r)) return false;
2365 Klass* k = java_lang_Class::as_Klass(r);
2366 assert(k->oop_is_instance(), "must be an instance klass");
2367 if (! k->oop_is_instance()) return false;
2369 ResourceMark rm(THREAD);
2370 const char* name = k->name()->as_C_string();
2371 bool system_class = k->class_loader() == NULL;
2372 return JavaAssertions::enabled(name, system_class);
2374 JVM_END
2377 // Return a new AssertionStatusDirectives object with the fields filled in with
2378 // command-line assertion arguments (i.e., -ea, -da).
2379 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2380 JVMWrapper("JVM_AssertionStatusDirectives");
2381 JvmtiVMObjectAllocEventCollector oam;
2382 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2383 return JNIHandles::make_local(env, asd);
2384 JVM_END
2386 // Verification ////////////////////////////////////////////////////////////////////////////////
2388 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2390 // RedefineClasses support: bug 6214132 caused verification to fail.
2391 // All functions from this section should call the jvmtiThreadSate function:
2392 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2393 // The function returns a Klass* of the _scratch_class if the verifier
2394 // was invoked in the middle of the class redefinition.
2395 // Otherwise it returns its argument value which is the _the_class Klass*.
2396 // Please, refer to the description in the jvmtiThreadSate.hpp.
2398 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2399 JVMWrapper("JVM_GetClassNameUTF");
2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 return k->name()->as_utf8();
2403 JVM_END
2406 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2407 JVMWrapper("JVM_GetClassCPTypes");
2408 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2409 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410 // types will have length zero if this is not an InstanceKlass
2411 // (length is determined by call to JVM_GetClassCPEntriesCount)
2412 if (k->oop_is_instance()) {
2413 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2414 for (int index = cp->length() - 1; index >= 0; index--) {
2415 constantTag tag = cp->tag_at(index);
2416 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2417 }
2418 }
2419 JVM_END
2422 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2423 JVMWrapper("JVM_GetClassCPEntriesCount");
2424 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2425 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2426 if (!k->oop_is_instance())
2427 return 0;
2428 return InstanceKlass::cast(k)->constants()->length();
2429 JVM_END
2432 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2433 JVMWrapper("JVM_GetClassFieldsCount");
2434 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2435 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2436 if (!k->oop_is_instance())
2437 return 0;
2438 return InstanceKlass::cast(k)->java_fields_count();
2439 JVM_END
2442 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2443 JVMWrapper("JVM_GetClassMethodsCount");
2444 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2445 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2446 if (!k->oop_is_instance())
2447 return 0;
2448 return InstanceKlass::cast(k)->methods()->length();
2449 JVM_END
2452 // The following methods, used for the verifier, are never called with
2453 // array klasses, so a direct cast to InstanceKlass is safe.
2454 // Typically, these methods are called in a loop with bounds determined
2455 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2456 // zero for arrays.
2457 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2458 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2459 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2460 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2461 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2462 int length = method->checked_exceptions_length();
2463 if (length > 0) {
2464 CheckedExceptionElement* table= method->checked_exceptions_start();
2465 for (int i = 0; i < length; i++) {
2466 exceptions[i] = table[i].class_cp_index;
2467 }
2468 }
2469 JVM_END
2472 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2473 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2474 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2475 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2476 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2477 return method->checked_exceptions_length();
2478 JVM_END
2481 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2482 JVMWrapper("JVM_GetMethodIxByteCode");
2483 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2484 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2485 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2486 memcpy(code, method->code_base(), method->code_size());
2487 JVM_END
2490 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2491 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2492 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2493 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2494 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2495 return method->code_size();
2496 JVM_END
2499 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2500 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2501 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2502 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2503 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2504 ExceptionTable extable(method);
2505 entry->start_pc = extable.start_pc(entry_index);
2506 entry->end_pc = extable.end_pc(entry_index);
2507 entry->handler_pc = extable.handler_pc(entry_index);
2508 entry->catchType = extable.catch_type_index(entry_index);
2509 JVM_END
2512 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2513 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2514 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2515 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2516 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2517 return method->exception_table_length();
2518 JVM_END
2521 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2522 JVMWrapper("JVM_GetMethodIxModifiers");
2523 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2524 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2525 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2526 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2527 JVM_END
2530 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2531 JVMWrapper("JVM_GetFieldIxModifiers");
2532 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2533 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2534 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2535 JVM_END
2538 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2539 JVMWrapper("JVM_GetMethodIxLocalsCount");
2540 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2541 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2542 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2543 return method->max_locals();
2544 JVM_END
2547 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2548 JVMWrapper("JVM_GetMethodIxArgsSize");
2549 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2550 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2551 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2552 return method->size_of_parameters();
2553 JVM_END
2556 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2557 JVMWrapper("JVM_GetMethodIxMaxStack");
2558 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2559 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2560 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2561 return method->verifier_max_stack();
2562 JVM_END
2565 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2566 JVMWrapper("JVM_IsConstructorIx");
2567 ResourceMark rm(THREAD);
2568 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2569 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2570 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2571 return method->name() == vmSymbols::object_initializer_name();
2572 JVM_END
2575 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2576 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2577 ResourceMark rm(THREAD);
2578 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2581 return method->is_overpass();
2582 JVM_END
2584 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2585 JVMWrapper("JVM_GetMethodIxIxUTF");
2586 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2587 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2588 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2589 return method->name()->as_utf8();
2590 JVM_END
2593 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2594 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2595 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2596 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2597 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2598 return method->signature()->as_utf8();
2599 JVM_END
2601 /**
2602 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2603 * read entries in the constant pool. Since the old verifier always
2604 * works on a copy of the code, it will not see any rewriting that
2605 * may possibly occur in the middle of verification. So it is important
2606 * that nothing it calls tries to use the cpCache instead of the raw
2607 * constant pool, so we must use cp->uncached_x methods when appropriate.
2608 */
2609 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2610 JVMWrapper("JVM_GetCPFieldNameUTF");
2611 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2612 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2613 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2614 switch (cp->tag_at(cp_index).value()) {
2615 case JVM_CONSTANT_Fieldref:
2616 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2617 default:
2618 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2619 }
2620 ShouldNotReachHere();
2621 return NULL;
2622 JVM_END
2625 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2626 JVMWrapper("JVM_GetCPMethodNameUTF");
2627 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2628 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2629 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2630 switch (cp->tag_at(cp_index).value()) {
2631 case JVM_CONSTANT_InterfaceMethodref:
2632 case JVM_CONSTANT_Methodref:
2633 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2634 default:
2635 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2636 }
2637 ShouldNotReachHere();
2638 return NULL;
2639 JVM_END
2642 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2643 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2644 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2645 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2646 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2647 switch (cp->tag_at(cp_index).value()) {
2648 case JVM_CONSTANT_InterfaceMethodref:
2649 case JVM_CONSTANT_Methodref:
2650 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2651 default:
2652 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2653 }
2654 ShouldNotReachHere();
2655 return NULL;
2656 JVM_END
2659 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2660 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2661 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2662 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2663 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2664 switch (cp->tag_at(cp_index).value()) {
2665 case JVM_CONSTANT_Fieldref:
2666 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2667 default:
2668 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2669 }
2670 ShouldNotReachHere();
2671 return NULL;
2672 JVM_END
2675 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2676 JVMWrapper("JVM_GetCPClassNameUTF");
2677 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2678 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2679 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2680 Symbol* classname = cp->klass_name_at(cp_index);
2681 return classname->as_utf8();
2682 JVM_END
2685 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2686 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2687 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2688 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2689 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2690 switch (cp->tag_at(cp_index).value()) {
2691 case JVM_CONSTANT_Fieldref: {
2692 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2693 Symbol* classname = cp->klass_name_at(class_index);
2694 return classname->as_utf8();
2695 }
2696 default:
2697 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2698 }
2699 ShouldNotReachHere();
2700 return NULL;
2701 JVM_END
2704 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2705 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2706 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2707 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2708 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2709 switch (cp->tag_at(cp_index).value()) {
2710 case JVM_CONSTANT_Methodref:
2711 case JVM_CONSTANT_InterfaceMethodref: {
2712 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2713 Symbol* classname = cp->klass_name_at(class_index);
2714 return classname->as_utf8();
2715 }
2716 default:
2717 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2718 }
2719 ShouldNotReachHere();
2720 return NULL;
2721 JVM_END
2724 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2725 JVMWrapper("JVM_GetCPFieldModifiers");
2726 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2727 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2728 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2729 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2730 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2731 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2732 switch (cp->tag_at(cp_index).value()) {
2733 case JVM_CONSTANT_Fieldref: {
2734 Symbol* name = cp->uncached_name_ref_at(cp_index);
2735 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2736 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2737 if (fs.name() == name && fs.signature() == signature) {
2738 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2739 }
2740 }
2741 return -1;
2742 }
2743 default:
2744 fatal("JVM_GetCPFieldModifiers: illegal constant");
2745 }
2746 ShouldNotReachHere();
2747 return 0;
2748 JVM_END
2751 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2752 JVMWrapper("JVM_GetCPMethodModifiers");
2753 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2754 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2755 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2756 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2757 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2758 switch (cp->tag_at(cp_index).value()) {
2759 case JVM_CONSTANT_Methodref:
2760 case JVM_CONSTANT_InterfaceMethodref: {
2761 Symbol* name = cp->uncached_name_ref_at(cp_index);
2762 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2763 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2764 int methods_count = methods->length();
2765 for (int i = 0; i < methods_count; i++) {
2766 Method* method = methods->at(i);
2767 if (method->name() == name && method->signature() == signature) {
2768 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2769 }
2770 }
2771 return -1;
2772 }
2773 default:
2774 fatal("JVM_GetCPMethodModifiers: illegal constant");
2775 }
2776 ShouldNotReachHere();
2777 return 0;
2778 JVM_END
2781 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2783 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2784 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2785 JVM_END
2788 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2789 JVMWrapper("JVM_IsSameClassPackage");
2790 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2791 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2792 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2793 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2794 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2795 JVM_END
2798 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2800 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2801 JVMWrapper2("JVM_Open (%s)", fname);
2803 //%note jvm_r6
2804 int result = os::open(fname, flags, mode);
2805 if (result >= 0) {
2806 return result;
2807 } else {
2808 switch(errno) {
2809 case EEXIST:
2810 return JVM_EEXIST;
2811 default:
2812 return -1;
2813 }
2814 }
2815 JVM_END
2818 JVM_LEAF(jint, JVM_Close(jint fd))
2819 JVMWrapper2("JVM_Close (0x%x)", fd);
2820 //%note jvm_r6
2821 return os::close(fd);
2822 JVM_END
2825 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2826 JVMWrapper2("JVM_Read (0x%x)", fd);
2828 //%note jvm_r6
2829 return (jint)os::restartable_read(fd, buf, nbytes);
2830 JVM_END
2833 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2834 JVMWrapper2("JVM_Write (0x%x)", fd);
2836 //%note jvm_r6
2837 return (jint)os::write(fd, buf, nbytes);
2838 JVM_END
2841 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2842 JVMWrapper2("JVM_Available (0x%x)", fd);
2843 //%note jvm_r6
2844 return os::available(fd, pbytes);
2845 JVM_END
2848 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2849 JVMWrapper4("JVM_Lseek (0x%x, " INT64_FORMAT ", %d)", fd, (int64_t) offset, whence);
2850 //%note jvm_r6
2851 return os::lseek(fd, offset, whence);
2852 JVM_END
2855 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2856 JVMWrapper3("JVM_SetLength (0x%x, " INT64_FORMAT ")", fd, (int64_t) length);
2857 return os::ftruncate(fd, length);
2858 JVM_END
2861 JVM_LEAF(jint, JVM_Sync(jint fd))
2862 JVMWrapper2("JVM_Sync (0x%x)", fd);
2863 //%note jvm_r6
2864 return os::fsync(fd);
2865 JVM_END
2868 // Printing support //////////////////////////////////////////////////
2869 extern "C" {
2871 ATTRIBUTE_PRINTF(3, 0)
2872 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2873 // see bug 4399518, 4417214
2874 if ((intptr_t)count <= 0) return -1;
2876 int result = vsnprintf(str, count, fmt, args);
2877 // Note: on truncation vsnprintf(3) on Unix returns number of
2878 // characters which would have been written had the buffer been large
2879 // enough; on Windows, it returns -1. We handle both cases here and
2880 // always return -1, and perform null termination.
2881 if ((result > 0 && (size_t)result >= count) || result == -1) {
2882 str[count - 1] = '\0';
2883 result = -1;
2884 }
2886 return result;
2887 }
2889 ATTRIBUTE_PRINTF(3, 0)
2890 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2891 va_list args;
2892 int len;
2893 va_start(args, fmt);
2894 len = jio_vsnprintf(str, count, fmt, args);
2895 va_end(args);
2896 return len;
2897 }
2899 ATTRIBUTE_PRINTF(2,3)
2900 int jio_fprintf(FILE* f, const char *fmt, ...) {
2901 int len;
2902 va_list args;
2903 va_start(args, fmt);
2904 len = jio_vfprintf(f, fmt, args);
2905 va_end(args);
2906 return len;
2907 }
2909 ATTRIBUTE_PRINTF(2, 0)
2910 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2911 if (Arguments::vfprintf_hook() != NULL) {
2912 return Arguments::vfprintf_hook()(f, fmt, args);
2913 } else {
2914 return vfprintf(f, fmt, args);
2915 }
2916 }
2918 ATTRIBUTE_PRINTF(1, 2)
2919 JNIEXPORT int jio_printf(const char *fmt, ...) {
2920 int len;
2921 va_list args;
2922 va_start(args, fmt);
2923 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2924 va_end(args);
2925 return len;
2926 }
2929 // HotSpot specific jio method
2930 void jio_print(const char* s) {
2931 // Try to make this function as atomic as possible.
2932 if (Arguments::vfprintf_hook() != NULL) {
2933 jio_fprintf(defaultStream::output_stream(), "%s", s);
2934 } else {
2935 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2936 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2937 }
2938 }
2940 } // Extern C
2942 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2944 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2945 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2946 // OSThread objects. The exception to this rule is when the target object is the thread
2947 // doing the operation, in which case we know that the thread won't exit until the
2948 // operation is done (all exits being voluntary). There are a few cases where it is
2949 // rather silly to do operations on yourself, like resuming yourself or asking whether
2950 // you are alive. While these can still happen, they are not subject to deadlocks if
2951 // the lock is held while the operation occurs (this is not the case for suspend, for
2952 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2953 // implementation is local to this file, we always lock Threads_lock for that one.
2955 static void thread_entry(JavaThread* thread, TRAPS) {
2956 HandleMark hm(THREAD);
2957 Handle obj(THREAD, thread->threadObj());
2958 JavaValue result(T_VOID);
2959 JavaCalls::call_virtual(&result,
2960 obj,
2961 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2962 vmSymbols::run_method_name(),
2963 vmSymbols::void_method_signature(),
2964 THREAD);
2965 }
2968 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2969 JVMWrapper("JVM_StartThread");
2970 JavaThread *native_thread = NULL;
2972 // We cannot hold the Threads_lock when we throw an exception,
2973 // due to rank ordering issues. Example: we might need to grab the
2974 // Heap_lock while we construct the exception.
2975 bool throw_illegal_thread_state = false;
2977 // We must release the Threads_lock before we can post a jvmti event
2978 // in Thread::start.
2979 {
2980 // Ensure that the C++ Thread and OSThread structures aren't freed before
2981 // we operate.
2982 MutexLocker mu(Threads_lock);
2984 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2985 // re-starting an already started thread, so we should usually find
2986 // that the JavaThread is null. However for a JNI attached thread
2987 // there is a small window between the Thread object being created
2988 // (with its JavaThread set) and the update to its threadStatus, so we
2989 // have to check for this
2990 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2991 throw_illegal_thread_state = true;
2992 } else {
2993 // We could also check the stillborn flag to see if this thread was already stopped, but
2994 // for historical reasons we let the thread detect that itself when it starts running
2996 jlong size =
2997 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2998 // Allocate the C++ Thread structure and create the native thread. The
2999 // stack size retrieved from java is signed, but the constructor takes
3000 // size_t (an unsigned type), so avoid passing negative values which would
3001 // result in really large stacks.
3002 size_t sz = size > 0 ? (size_t) size : 0;
3003 native_thread = new JavaThread(&thread_entry, sz);
3005 // At this point it may be possible that no osthread was created for the
3006 // JavaThread due to lack of memory. Check for this situation and throw
3007 // an exception if necessary. Eventually we may want to change this so
3008 // that we only grab the lock if the thread was created successfully -
3009 // then we can also do this check and throw the exception in the
3010 // JavaThread constructor.
3011 if (native_thread->osthread() != NULL) {
3012 // Note: the current thread is not being used within "prepare".
3013 native_thread->prepare(jthread);
3014 }
3015 }
3016 }
3018 if (throw_illegal_thread_state) {
3019 THROW(vmSymbols::java_lang_IllegalThreadStateException());
3020 }
3022 assert(native_thread != NULL, "Starting null thread?");
3024 if (native_thread->osthread() == NULL) {
3025 // No one should hold a reference to the 'native_thread'.
3026 delete native_thread;
3027 if (JvmtiExport::should_post_resource_exhausted()) {
3028 JvmtiExport::post_resource_exhausted(
3029 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
3030 "unable to create new native thread");
3031 }
3032 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
3033 "unable to create new native thread");
3034 }
3036 Thread::start(native_thread);
3038 JVM_END
3040 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
3041 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
3042 // but is thought to be reliable and simple. In the case, where the receiver is the
3043 // same thread as the sender, no safepoint is needed.
3044 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
3045 JVMWrapper("JVM_StopThread");
3047 oop java_throwable = JNIHandles::resolve(throwable);
3048 if (java_throwable == NULL) {
3049 THROW(vmSymbols::java_lang_NullPointerException());
3050 }
3051 oop java_thread = JNIHandles::resolve_non_null(jthread);
3052 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3053 Events::log_exception(JavaThread::current(),
3054 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
3055 p2i(receiver), p2i((address)java_thread), p2i(throwable));
3056 // First check if thread is alive
3057 if (receiver != NULL) {
3058 // Check if exception is getting thrown at self (use oop equality, since the
3059 // target object might exit)
3060 if (java_thread == thread->threadObj()) {
3061 THROW_OOP(java_throwable);
3062 } else {
3063 // Enques a VM_Operation to stop all threads and then deliver the exception...
3064 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
3065 }
3066 }
3067 else {
3068 // Either:
3069 // - target thread has not been started before being stopped, or
3070 // - target thread already terminated
3071 // We could read the threadStatus to determine which case it is
3072 // but that is overkill as it doesn't matter. We must set the
3073 // stillborn flag for the first case, and if the thread has already
3074 // exited setting this flag has no affect
3075 java_lang_Thread::set_stillborn(java_thread);
3076 }
3077 JVM_END
3080 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
3081 JVMWrapper("JVM_IsThreadAlive");
3083 oop thread_oop = JNIHandles::resolve_non_null(jthread);
3084 return java_lang_Thread::is_alive(thread_oop);
3085 JVM_END
3088 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
3089 JVMWrapper("JVM_SuspendThread");
3090 oop java_thread = JNIHandles::resolve_non_null(jthread);
3091 JavaThread* receiver = java_lang_Thread::thread(java_thread);
3093 if (receiver != NULL) {
3094 // thread has run and has not exited (still on threads list)
3096 {
3097 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
3098 if (receiver->is_external_suspend()) {
3099 // Don't allow nested external suspend requests. We can't return
3100 // an error from this interface so just ignore the problem.
3101 return;
3102 }
3103 if (receiver->is_exiting()) { // thread is in the process of exiting
3104 return;
3105 }
3106 receiver->set_external_suspend();
3107 }
3109 // java_suspend() will catch threads in the process of exiting
3110 // and will ignore them.
3111 receiver->java_suspend();
3113 // It would be nice to have the following assertion in all the
3114 // time, but it is possible for a racing resume request to have
3115 // resumed this thread right after we suspended it. Temporarily
3116 // enable this assertion if you are chasing a different kind of
3117 // bug.
3118 //
3119 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
3120 // receiver->is_being_ext_suspended(), "thread is not suspended");
3121 }
3122 JVM_END
3125 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
3126 JVMWrapper("JVM_ResumeThread");
3127 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
3128 // We need to *always* get the threads lock here, since this operation cannot be allowed during
3129 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
3130 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
3131 // looks at it.
3132 MutexLocker ml(Threads_lock);
3133 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3134 if (thr != NULL) {
3135 // the thread has run and is not in the process of exiting
3136 thr->java_resume();
3137 }
3138 JVM_END
3141 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
3142 JVMWrapper("JVM_SetThreadPriority");
3143 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3144 MutexLocker ml(Threads_lock);
3145 oop java_thread = JNIHandles::resolve_non_null(jthread);
3146 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
3147 JavaThread* thr = java_lang_Thread::thread(java_thread);
3148 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
3149 Thread::set_priority(thr, (ThreadPriority)prio);
3150 }
3151 JVM_END
3154 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
3155 JVMWrapper("JVM_Yield");
3156 if (os::dont_yield()) return;
3157 #ifndef USDT2
3158 HS_DTRACE_PROBE0(hotspot, thread__yield);
3159 #else /* USDT2 */
3160 HOTSPOT_THREAD_YIELD();
3161 #endif /* USDT2 */
3162 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
3163 // Critical for similar threading behaviour
3164 if (ConvertYieldToSleep) {
3165 os::sleep(thread, MinSleepInterval, false);
3166 } else {
3167 os::yield();
3168 }
3169 JVM_END
3172 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
3173 JVMWrapper("JVM_Sleep");
3175 if (millis < 0) {
3176 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
3177 }
3179 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
3180 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3181 }
3183 // Save current thread state and restore it at the end of this block.
3184 // And set new thread state to SLEEPING.
3185 JavaThreadSleepState jtss(thread);
3187 #ifndef USDT2
3188 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3189 #else /* USDT2 */
3190 HOTSPOT_THREAD_SLEEP_BEGIN(
3191 millis);
3192 #endif /* USDT2 */
3194 EventThreadSleep event;
3196 if (millis == 0) {
3197 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3198 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3199 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3200 // for SOLARIS
3201 if (ConvertSleepToYield) {
3202 os::yield();
3203 } else {
3204 ThreadState old_state = thread->osthread()->get_state();
3205 thread->osthread()->set_state(SLEEPING);
3206 os::sleep(thread, MinSleepInterval, false);
3207 thread->osthread()->set_state(old_state);
3208 }
3209 } else {
3210 ThreadState old_state = thread->osthread()->get_state();
3211 thread->osthread()->set_state(SLEEPING);
3212 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3213 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3214 // us while we were sleeping. We do not overwrite those.
3215 if (!HAS_PENDING_EXCEPTION) {
3216 if (event.should_commit()) {
3217 event.set_time(millis);
3218 event.commit();
3219 }
3220 #ifndef USDT2
3221 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3222 #else /* USDT2 */
3223 HOTSPOT_THREAD_SLEEP_END(
3224 1);
3225 #endif /* USDT2 */
3226 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3227 // to properly restore the thread state. That's likely wrong.
3228 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3229 }
3230 }
3231 thread->osthread()->set_state(old_state);
3232 }
3233 if (event.should_commit()) {
3234 event.set_time(millis);
3235 event.commit();
3236 }
3237 #ifndef USDT2
3238 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3239 #else /* USDT2 */
3240 HOTSPOT_THREAD_SLEEP_END(
3241 0);
3242 #endif /* USDT2 */
3243 JVM_END
3245 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3246 JVMWrapper("JVM_CurrentThread");
3247 oop jthread = thread->threadObj();
3248 assert (thread != NULL, "no current thread!");
3249 return JNIHandles::make_local(env, jthread);
3250 JVM_END
3253 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3254 JVMWrapper("JVM_CountStackFrames");
3256 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3257 oop java_thread = JNIHandles::resolve_non_null(jthread);
3258 bool throw_illegal_thread_state = false;
3259 int count = 0;
3261 {
3262 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3263 // We need to re-resolve the java_thread, since a GC might have happened during the
3264 // acquire of the lock
3265 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3267 if (thr == NULL) {
3268 // do nothing
3269 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3270 // Check whether this java thread has been suspended already. If not, throws
3271 // IllegalThreadStateException. We defer to throw that exception until
3272 // Threads_lock is released since loading exception class has to leave VM.
3273 // The correct way to test a thread is actually suspended is
3274 // wait_for_ext_suspend_completion(), but we can't call that while holding
3275 // the Threads_lock. The above tests are sufficient for our purposes
3276 // provided the walkability of the stack is stable - which it isn't
3277 // 100% but close enough for most practical purposes.
3278 throw_illegal_thread_state = true;
3279 } else {
3280 // Count all java activation, i.e., number of vframes
3281 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3282 // Native frames are not counted
3283 if (!vfst.method()->is_native()) count++;
3284 }
3285 }
3286 }
3288 if (throw_illegal_thread_state) {
3289 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3290 "this thread is not suspended");
3291 }
3292 return count;
3293 JVM_END
3295 // Consider: A better way to implement JVM_Interrupt() is to acquire
3296 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3297 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3298 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3299 // outside the critical section. Threads_lock is hot so we want to minimize
3300 // the hold-time. A cleaner interface would be to decompose interrupt into
3301 // two steps. The 1st phase, performed under Threads_lock, would return
3302 // a closure that'd be invoked after Threads_lock was dropped.
3303 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3304 // admit spurious wakeups.
3306 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3307 JVMWrapper("JVM_Interrupt");
3309 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3310 oop java_thread = JNIHandles::resolve_non_null(jthread);
3311 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3312 // We need to re-resolve the java_thread, since a GC might have happened during the
3313 // acquire of the lock
3314 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3315 if (thr != NULL) {
3316 Thread::interrupt(thr);
3317 }
3318 JVM_END
3321 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3322 JVMWrapper("JVM_IsInterrupted");
3324 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3325 oop java_thread = JNIHandles::resolve_non_null(jthread);
3326 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3327 // We need to re-resolve the java_thread, since a GC might have happened during the
3328 // acquire of the lock
3329 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3330 if (thr == NULL) {
3331 return JNI_FALSE;
3332 } else {
3333 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3334 }
3335 JVM_END
3338 // Return true iff the current thread has locked the object passed in
3340 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3341 JVMWrapper("JVM_HoldsLock");
3342 assert(THREAD->is_Java_thread(), "sanity check");
3343 if (obj == NULL) {
3344 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3345 }
3346 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3347 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3348 JVM_END
3351 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3352 JVMWrapper("JVM_DumpAllStacks");
3353 VM_PrintThreads op;
3354 VMThread::execute(&op);
3355 if (JvmtiExport::should_post_data_dump()) {
3356 JvmtiExport::post_data_dump();
3357 }
3358 JVM_END
3360 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3361 JVMWrapper("JVM_SetNativeThreadName");
3362 ResourceMark rm(THREAD);
3363 oop java_thread = JNIHandles::resolve_non_null(jthread);
3364 JavaThread* thr = java_lang_Thread::thread(java_thread);
3365 // Thread naming only supported for the current thread, doesn't work for
3366 // target threads.
3367 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3368 // we don't set the name of an attached thread to avoid stepping
3369 // on other programs
3370 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3371 os::set_native_thread_name(thread_name);
3372 }
3373 JVM_END
3375 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3377 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3378 assert(jthread->is_Java_thread(), "must be a Java thread");
3379 if (jthread->privileged_stack_top() == NULL) return false;
3380 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3381 oop loader = jthread->privileged_stack_top()->class_loader();
3382 if (loader == NULL) return true;
3383 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3384 if (trusted) return true;
3385 }
3386 return false;
3387 }
3389 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3390 JVMWrapper("JVM_CurrentLoadedClass");
3391 ResourceMark rm(THREAD);
3393 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3394 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3395 bool trusted = is_trusted_frame(thread, &vfst);
3396 if (trusted) return NULL;
3398 Method* m = vfst.method();
3399 if (!m->is_native()) {
3400 InstanceKlass* holder = m->method_holder();
3401 oop loader = holder->class_loader();
3402 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3403 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3404 }
3405 }
3406 }
3407 return NULL;
3408 JVM_END
3411 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3412 JVMWrapper("JVM_CurrentClassLoader");
3413 ResourceMark rm(THREAD);
3415 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3417 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3418 bool trusted = is_trusted_frame(thread, &vfst);
3419 if (trusted) return NULL;
3421 Method* m = vfst.method();
3422 if (!m->is_native()) {
3423 InstanceKlass* holder = m->method_holder();
3424 assert(holder->is_klass(), "just checking");
3425 oop loader = holder->class_loader();
3426 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3427 return JNIHandles::make_local(env, loader);
3428 }
3429 }
3430 }
3431 return NULL;
3432 JVM_END
3435 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3436 JVMWrapper("JVM_GetClassContext");
3437 ResourceMark rm(THREAD);
3438 JvmtiVMObjectAllocEventCollector oam;
3439 vframeStream vfst(thread);
3441 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3442 // This must only be called from SecurityManager.getClassContext
3443 Method* m = vfst.method();
3444 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3445 m->name() == vmSymbols::getClassContext_name() &&
3446 m->signature() == vmSymbols::void_class_array_signature())) {
3447 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3448 }
3449 }
3451 // Collect method holders
3452 GrowableArray<KlassHandle>* klass_array = new GrowableArray<KlassHandle>();
3453 for (; !vfst.at_end(); vfst.security_next()) {
3454 Method* m = vfst.method();
3455 // Native frames are not returned
3456 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3457 Klass* holder = m->method_holder();
3458 assert(holder->is_klass(), "just checking");
3459 klass_array->append(holder);
3460 }
3461 }
3463 // Create result array of type [Ljava/lang/Class;
3464 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), klass_array->length(), CHECK_NULL);
3465 // Fill in mirrors corresponding to method holders
3466 for (int i = 0; i < klass_array->length(); i++) {
3467 result->obj_at_put(i, klass_array->at(i)->java_mirror());
3468 }
3470 return (jobjectArray) JNIHandles::make_local(env, result);
3471 JVM_END
3474 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3475 JVMWrapper("JVM_ClassDepth");
3476 ResourceMark rm(THREAD);
3477 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3478 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3480 const char* str = java_lang_String::as_utf8_string(class_name_str());
3481 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3482 if (class_name_sym == NULL) {
3483 return -1;
3484 }
3486 int depth = 0;
3488 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3489 if (!vfst.method()->is_native()) {
3490 InstanceKlass* holder = vfst.method()->method_holder();
3491 assert(holder->is_klass(), "just checking");
3492 if (holder->name() == class_name_sym) {
3493 return depth;
3494 }
3495 depth++;
3496 }
3497 }
3498 return -1;
3499 JVM_END
3502 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3503 JVMWrapper("JVM_ClassLoaderDepth");
3504 ResourceMark rm(THREAD);
3505 int depth = 0;
3506 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3507 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3508 bool trusted = is_trusted_frame(thread, &vfst);
3509 if (trusted) return -1;
3511 Method* m = vfst.method();
3512 if (!m->is_native()) {
3513 InstanceKlass* holder = m->method_holder();
3514 assert(holder->is_klass(), "just checking");
3515 oop loader = holder->class_loader();
3516 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3517 return depth;
3518 }
3519 depth++;
3520 }
3521 }
3522 return -1;
3523 JVM_END
3526 // java.lang.Package ////////////////////////////////////////////////////////////////
3529 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3530 JVMWrapper("JVM_GetSystemPackage");
3531 ResourceMark rm(THREAD);
3532 JvmtiVMObjectAllocEventCollector oam;
3533 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3534 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3535 return (jstring) JNIHandles::make_local(result);
3536 JVM_END
3539 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3540 JVMWrapper("JVM_GetSystemPackages");
3541 JvmtiVMObjectAllocEventCollector oam;
3542 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3543 return (jobjectArray) JNIHandles::make_local(result);
3544 JVM_END
3547 // ObjectInputStream ///////////////////////////////////////////////////////////////
3549 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3550 if (current_class == NULL) {
3551 return true;
3552 }
3553 if ((current_class == field_class) || access.is_public()) {
3554 return true;
3555 }
3557 if (access.is_protected()) {
3558 // See if current_class is a subclass of field_class
3559 if (current_class->is_subclass_of(field_class)) {
3560 return true;
3561 }
3562 }
3564 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3565 }
3568 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3569 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3570 JVMWrapper("JVM_AllocateNewObject");
3571 JvmtiVMObjectAllocEventCollector oam;
3572 // Receiver is not used
3573 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3574 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3576 // Cannot instantiate primitive types
3577 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3578 ResourceMark rm(THREAD);
3579 THROW_0(vmSymbols::java_lang_InvalidClassException());
3580 }
3582 // Arrays not allowed here, must use JVM_AllocateNewArray
3583 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3584 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3585 ResourceMark rm(THREAD);
3586 THROW_0(vmSymbols::java_lang_InvalidClassException());
3587 }
3589 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3590 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3592 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3594 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3595 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3597 // Make sure klass is initialized, since we are about to instantiate one of them.
3598 curr_klass->initialize(CHECK_NULL);
3600 methodHandle m (THREAD,
3601 init_klass->find_method(vmSymbols::object_initializer_name(),
3602 vmSymbols::void_method_signature()));
3603 if (m.is_null()) {
3604 ResourceMark rm(THREAD);
3605 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3606 Method::name_and_sig_as_C_string(init_klass(),
3607 vmSymbols::object_initializer_name(),
3608 vmSymbols::void_method_signature()));
3609 }
3611 if (curr_klass == init_klass && !m->is_public()) {
3612 // Calling the constructor for class 'curr_klass'.
3613 // Only allow calls to a public no-arg constructor.
3614 // This path corresponds to creating an Externalizable object.
3615 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3616 }
3618 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3619 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3620 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3621 }
3623 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3624 // Call constructor m. This might call a constructor higher up in the hierachy
3625 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3627 return JNIHandles::make_local(obj());
3628 JVM_END
3631 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3632 JVMWrapper("JVM_AllocateNewArray");
3633 JvmtiVMObjectAllocEventCollector oam;
3634 oop mirror = JNIHandles::resolve_non_null(currClass);
3636 if (java_lang_Class::is_primitive(mirror)) {
3637 THROW_0(vmSymbols::java_lang_InvalidClassException());
3638 }
3639 Klass* k = java_lang_Class::as_Klass(mirror);
3640 oop result;
3642 if (k->oop_is_typeArray()) {
3643 // typeArray
3644 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3645 } else if (k->oop_is_objArray()) {
3646 // objArray
3647 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3648 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3649 result = oak->allocate(length, CHECK_NULL);
3650 } else {
3651 THROW_0(vmSymbols::java_lang_InvalidClassException());
3652 }
3653 return JNIHandles::make_local(env, result);
3654 JVM_END
3657 // Return the first non-null class loader up the execution stack, or null
3658 // if only code from the null class loader is on the stack.
3660 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3661 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3662 // UseNewReflection
3663 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3664 oop loader = vfst.method()->method_holder()->class_loader();
3665 if (loader != NULL) {
3666 return JNIHandles::make_local(env, loader);
3667 }
3668 }
3669 return NULL;
3670 JVM_END
3673 // Load a class relative to the most recent class on the stack with a non-null
3674 // classloader.
3675 // This function has been deprecated and should not be considered part of the
3676 // specified JVM interface.
3678 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3679 jclass currClass, jstring currClassName))
3680 JVMWrapper("JVM_LoadClass0");
3681 // Receiver is not used
3682 ResourceMark rm(THREAD);
3684 // Class name argument is not guaranteed to be in internal format
3685 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3686 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3688 const char* str = java_lang_String::as_utf8_string(string());
3690 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3691 // It's impossible to create this class; the name cannot fit
3692 // into the constant pool.
3693 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3694 }
3696 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3697 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3698 // Find the most recent class on the stack with a non-null classloader
3699 oop loader = NULL;
3700 oop protection_domain = NULL;
3701 if (curr_klass.is_null()) {
3702 for (vframeStream vfst(thread);
3703 !vfst.at_end() && loader == NULL;
3704 vfst.next()) {
3705 if (!vfst.method()->is_native()) {
3706 InstanceKlass* holder = vfst.method()->method_holder();
3707 loader = holder->class_loader();
3708 protection_domain = holder->protection_domain();
3709 }
3710 }
3711 } else {
3712 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3713 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3714 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3715 }
3716 Handle h_loader(THREAD, loader);
3717 Handle h_prot (THREAD, protection_domain);
3718 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3719 false, thread);
3720 if (TraceClassResolution && result != NULL) {
3721 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3722 }
3723 return result;
3724 JVM_END
3727 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3730 // resolve array handle and check arguments
3731 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3732 if (arr == NULL) {
3733 THROW_0(vmSymbols::java_lang_NullPointerException());
3734 }
3735 oop a = JNIHandles::resolve_non_null(arr);
3736 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3737 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3738 }
3739 return arrayOop(a);
3740 }
3743 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3744 JVMWrapper("JVM_GetArrayLength");
3745 arrayOop a = check_array(env, arr, false, CHECK_0);
3746 return a->length();
3747 JVM_END
3750 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3751 JVMWrapper("JVM_Array_Get");
3752 JvmtiVMObjectAllocEventCollector oam;
3753 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3754 jvalue value;
3755 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3756 oop box = Reflection::box(&value, type, CHECK_NULL);
3757 return JNIHandles::make_local(env, box);
3758 JVM_END
3761 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3762 JVMWrapper("JVM_GetPrimitiveArrayElement");
3763 jvalue value;
3764 value.i = 0; // to initialize value before getting used in CHECK
3765 arrayOop a = check_array(env, arr, true, CHECK_(value));
3766 assert(a->is_typeArray(), "just checking");
3767 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3768 BasicType wide_type = (BasicType) wCode;
3769 if (type != wide_type) {
3770 Reflection::widen(&value, type, wide_type, CHECK_(value));
3771 }
3772 return value;
3773 JVM_END
3776 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3777 JVMWrapper("JVM_SetArrayElement");
3778 arrayOop a = check_array(env, arr, false, CHECK);
3779 oop box = JNIHandles::resolve(val);
3780 jvalue value;
3781 value.i = 0; // to initialize value before getting used in CHECK
3782 BasicType value_type;
3783 if (a->is_objArray()) {
3784 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3785 value_type = Reflection::unbox_for_regular_object(box, &value);
3786 } else {
3787 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3788 }
3789 Reflection::array_set(&value, a, index, value_type, CHECK);
3790 JVM_END
3793 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3794 JVMWrapper("JVM_SetPrimitiveArrayElement");
3795 arrayOop a = check_array(env, arr, true, CHECK);
3796 assert(a->is_typeArray(), "just checking");
3797 BasicType value_type = (BasicType) vCode;
3798 Reflection::array_set(&v, a, index, value_type, CHECK);
3799 JVM_END
3802 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3803 JVMWrapper("JVM_NewArray");
3804 JvmtiVMObjectAllocEventCollector oam;
3805 oop element_mirror = JNIHandles::resolve(eltClass);
3806 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3807 return JNIHandles::make_local(env, result);
3808 JVM_END
3811 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3812 JVMWrapper("JVM_NewMultiArray");
3813 JvmtiVMObjectAllocEventCollector oam;
3814 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3815 oop element_mirror = JNIHandles::resolve(eltClass);
3816 assert(dim_array->is_typeArray(), "just checking");
3817 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3818 return JNIHandles::make_local(env, result);
3819 JVM_END
3822 // Networking library support ////////////////////////////////////////////////////////////////////
3824 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3825 JVMWrapper("JVM_InitializeSocketLibrary");
3826 return 0;
3827 JVM_END
3830 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3831 JVMWrapper("JVM_Socket");
3832 return os::socket(domain, type, protocol);
3833 JVM_END
3836 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3837 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3838 //%note jvm_r6
3839 return os::socket_close(fd);
3840 JVM_END
3843 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3844 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3845 //%note jvm_r6
3846 return os::socket_shutdown(fd, howto);
3847 JVM_END
3850 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3851 JVMWrapper2("JVM_Recv (0x%x)", fd);
3852 //%note jvm_r6
3853 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3854 JVM_END
3857 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3858 JVMWrapper2("JVM_Send (0x%x)", fd);
3859 //%note jvm_r6
3860 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3861 JVM_END
3864 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3865 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3866 //%note jvm_r6
3867 return os::timeout(fd, timeout);
3868 JVM_END
3871 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3872 JVMWrapper2("JVM_Listen (0x%x)", fd);
3873 //%note jvm_r6
3874 return os::listen(fd, count);
3875 JVM_END
3878 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3879 JVMWrapper2("JVM_Connect (0x%x)", fd);
3880 //%note jvm_r6
3881 return os::connect(fd, him, (socklen_t)len);
3882 JVM_END
3885 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3886 JVMWrapper2("JVM_Bind (0x%x)", fd);
3887 //%note jvm_r6
3888 return os::bind(fd, him, (socklen_t)len);
3889 JVM_END
3892 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3893 JVMWrapper2("JVM_Accept (0x%x)", fd);
3894 //%note jvm_r6
3895 socklen_t socklen = (socklen_t)(*len);
3896 jint result = os::accept(fd, him, &socklen);
3897 *len = (jint)socklen;
3898 return result;
3899 JVM_END
3902 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3903 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3904 //%note jvm_r6
3905 socklen_t socklen = (socklen_t)(*fromlen);
3906 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3907 *fromlen = (int)socklen;
3908 return result;
3909 JVM_END
3912 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3913 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3914 //%note jvm_r6
3915 socklen_t socklen = (socklen_t)(*len);
3916 jint result = os::get_sock_name(fd, him, &socklen);
3917 *len = (int)socklen;
3918 return result;
3919 JVM_END
3922 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3923 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3924 //%note jvm_r6
3925 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3926 JVM_END
3929 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3930 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3931 //%note jvm_r6
3932 return os::socket_available(fd, pbytes);
3933 JVM_END
3936 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3937 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3938 //%note jvm_r6
3939 socklen_t socklen = (socklen_t)(*optlen);
3940 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3941 *optlen = (int)socklen;
3942 return result;
3943 JVM_END
3946 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3947 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3948 //%note jvm_r6
3949 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3950 JVM_END
3953 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3954 JVMWrapper("JVM_GetHostName");
3955 return os::get_host_name(name, namelen);
3956 JVM_END
3959 // Library support ///////////////////////////////////////////////////////////////////////////
3961 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3962 //%note jvm_ct
3963 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3964 char ebuf[1024];
3965 void *load_result;
3966 {
3967 ThreadToNativeFromVM ttnfvm(thread);
3968 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3969 }
3970 if (load_result == NULL) {
3971 char msg[1024];
3972 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3973 // Since 'ebuf' may contain a string encoded using
3974 // platform encoding scheme, we need to pass
3975 // Exceptions::unsafe_to_utf8 to the new_exception method
3976 // as the last argument. See bug 6367357.
3977 Handle h_exception =
3978 Exceptions::new_exception(thread,
3979 vmSymbols::java_lang_UnsatisfiedLinkError(),
3980 msg, Exceptions::unsafe_to_utf8);
3982 THROW_HANDLE_0(h_exception);
3983 }
3984 return load_result;
3985 JVM_END
3988 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3989 JVMWrapper("JVM_UnloadLibrary");
3990 os::dll_unload(handle);
3991 JVM_END
3994 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3995 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3996 return os::dll_lookup(handle, name);
3997 JVM_END
4000 // Floating point support ////////////////////////////////////////////////////////////////////
4002 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
4003 JVMWrapper("JVM_IsNaN");
4004 return g_isnan(a);
4005 JVM_END
4008 // JNI version ///////////////////////////////////////////////////////////////////////////////
4010 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
4011 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
4012 return Threads::is_supported_jni_version_including_1_1(version);
4013 JVM_END
4016 // String support ///////////////////////////////////////////////////////////////////////////
4018 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
4019 JVMWrapper("JVM_InternString");
4020 JvmtiVMObjectAllocEventCollector oam;
4021 if (str == NULL) return NULL;
4022 oop string = JNIHandles::resolve_non_null(str);
4023 oop result = StringTable::intern(string, CHECK_NULL);
4024 return (jstring) JNIHandles::make_local(env, result);
4025 JVM_END
4028 // Raw monitor support //////////////////////////////////////////////////////////////////////
4030 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
4031 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
4032 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
4033 // that only works with java threads.
4036 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
4037 VM_Exit::block_if_vm_exited();
4038 JVMWrapper("JVM_RawMonitorCreate");
4039 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
4040 }
4043 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
4044 VM_Exit::block_if_vm_exited();
4045 JVMWrapper("JVM_RawMonitorDestroy");
4046 delete ((Mutex*) mon);
4047 }
4050 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
4051 VM_Exit::block_if_vm_exited();
4052 JVMWrapper("JVM_RawMonitorEnter");
4053 ((Mutex*) mon)->jvm_raw_lock();
4054 return 0;
4055 }
4058 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
4059 VM_Exit::block_if_vm_exited();
4060 JVMWrapper("JVM_RawMonitorExit");
4061 ((Mutex*) mon)->jvm_raw_unlock();
4062 }
4065 // Support for Serialization
4067 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
4068 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
4069 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
4070 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
4072 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
4073 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
4074 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
4075 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
4078 void initialize_converter_functions() {
4079 if (JDK_Version::is_gte_jdk14x_version()) {
4080 // These functions only exist for compatibility with 1.3.1 and earlier
4081 return;
4082 }
4084 // called from universe_post_init()
4085 assert(
4086 int_bits_to_float_fn == NULL &&
4087 long_bits_to_double_fn == NULL &&
4088 float_to_int_bits_fn == NULL &&
4089 double_to_long_bits_fn == NULL ,
4090 "initialization done twice"
4091 );
4092 // initialize
4093 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
4094 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
4095 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
4096 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
4097 // verify
4098 assert(
4099 int_bits_to_float_fn != NULL &&
4100 long_bits_to_double_fn != NULL &&
4101 float_to_int_bits_fn != NULL &&
4102 double_to_long_bits_fn != NULL ,
4103 "initialization failed"
4104 );
4105 }
4109 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4111 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init,
4112 Handle loader, Handle protection_domain,
4113 jboolean throwError, TRAPS) {
4114 // Security Note:
4115 // The Java level wrapper will perform the necessary security check allowing
4116 // us to pass the NULL as the initiating class loader. The VM is responsible for
4117 // the checkPackageAccess relative to the initiating class loader via the
4118 // protection_domain. The protection_domain is passed as NULL by the java code
4119 // if there is no security manager in 3-arg Class.forName().
4120 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4122 KlassHandle klass_handle(THREAD, klass);
4123 // Check if we should initialize the class
4124 if (init && klass_handle->oop_is_instance()) {
4125 klass_handle->initialize(CHECK_NULL);
4126 }
4127 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4128 }
4131 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4133 #ifndef PRODUCT
4135 extern "C" {
4136 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4137 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4138 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4139 }
4141 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4142 JVMWrapper("JVM_AccessBoolVMFlag");
4143 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, Flag::INTERNAL);
4144 JVM_END
4146 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4147 JVMWrapper("JVM_AccessVMIntFlag");
4148 intx v;
4149 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, Flag::INTERNAL);
4150 *value = (jint)v;
4151 return result;
4152 JVM_END
4155 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4156 JVMWrapper("JVM_VMBreakPoint");
4157 oop the_obj = JNIHandles::resolve(obj);
4158 BREAKPOINT;
4159 JVM_END
4162 #endif
4165 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4167 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4168 JVMWrapper("JVM_InvokeMethod");
4169 Handle method_handle;
4170 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4171 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4172 Handle receiver(THREAD, JNIHandles::resolve(obj));
4173 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4174 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4175 jobject res = JNIHandles::make_local(env, result);
4176 if (JvmtiExport::should_post_vm_object_alloc()) {
4177 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4178 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4179 if (java_lang_Class::is_primitive(ret_type)) {
4180 // Only for primitive type vm allocates memory for java object.
4181 // See box() method.
4182 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4183 }
4184 }
4185 return res;
4186 } else {
4187 THROW_0(vmSymbols::java_lang_StackOverflowError());
4188 }
4189 JVM_END
4192 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4193 JVMWrapper("JVM_NewInstanceFromConstructor");
4194 oop constructor_mirror = JNIHandles::resolve(c);
4195 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4196 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4197 jobject res = JNIHandles::make_local(env, result);
4198 if (JvmtiExport::should_post_vm_object_alloc()) {
4199 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4200 }
4201 return res;
4202 JVM_END
4204 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4206 JVM_LEAF(jboolean, JVM_SupportsCX8())
4207 JVMWrapper("JVM_SupportsCX8");
4208 return VM_Version::supports_cx8();
4209 JVM_END
4212 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4213 JVMWrapper("JVM_CX8Field");
4214 jlong res;
4215 oop o = JNIHandles::resolve(obj);
4216 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4217 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4219 assert(VM_Version::supports_cx8(), "cx8 not supported");
4220 res = Atomic::cmpxchg(newVal, addr, oldVal);
4222 return res == oldVal;
4223 JVM_END
4225 // DTrace ///////////////////////////////////////////////////////////////////
4227 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4228 JVMWrapper("JVM_DTraceGetVersion");
4229 return (jint)JVM_TRACING_DTRACE_VERSION;
4230 JVM_END
4232 JVM_ENTRY(jlong,JVM_DTraceActivate(
4233 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4234 JVM_DTraceProvider* providers))
4235 JVMWrapper("JVM_DTraceActivate");
4236 return DTraceJSDT::activate(
4237 version, module_name, providers_count, providers, CHECK_0);
4238 JVM_END
4240 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4241 JVMWrapper("JVM_DTraceIsProbeEnabled");
4242 return DTraceJSDT::is_probe_enabled(method);
4243 JVM_END
4245 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4246 JVMWrapper("JVM_DTraceDispose");
4247 DTraceJSDT::dispose(handle);
4248 JVM_END
4250 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4251 JVMWrapper("JVM_DTraceIsSupported");
4252 return DTraceJSDT::is_supported();
4253 JVM_END
4255 // Returns an array of all live Thread objects (VM internal JavaThreads,
4256 // jvmti agent threads, and JNI attaching threads are skipped)
4257 // See CR 6404306 regarding JNI attaching threads
4258 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4259 ResourceMark rm(THREAD);
4260 ThreadsListEnumerator tle(THREAD, false, false);
4261 JvmtiVMObjectAllocEventCollector oam;
4263 int num_threads = tle.num_threads();
4264 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4265 objArrayHandle threads_ah(THREAD, r);
4267 for (int i = 0; i < num_threads; i++) {
4268 Handle h = tle.get_threadObj(i);
4269 threads_ah->obj_at_put(i, h());
4270 }
4272 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4273 JVM_END
4276 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4277 // Return StackTraceElement[][], each element is the stack trace of a thread in
4278 // the corresponding entry in the given threads array
4279 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4280 JVMWrapper("JVM_DumpThreads");
4281 JvmtiVMObjectAllocEventCollector oam;
4283 // Check if threads is null
4284 if (threads == NULL) {
4285 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4286 }
4288 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4289 objArrayHandle ah(THREAD, a);
4290 int num_threads = ah->length();
4291 // check if threads is non-empty array
4292 if (num_threads == 0) {
4293 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4294 }
4296 // check if threads is not an array of objects of Thread class
4297 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4298 if (k != SystemDictionary::Thread_klass()) {
4299 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4300 }
4302 ResourceMark rm(THREAD);
4304 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4305 for (int i = 0; i < num_threads; i++) {
4306 oop thread_obj = ah->obj_at(i);
4307 instanceHandle h(THREAD, (instanceOop) thread_obj);
4308 thread_handle_array->append(h);
4309 }
4311 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4312 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4314 JVM_END
4316 // JVM monitoring and management support
4317 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4318 return Management::get_jmm_interface(version);
4319 JVM_END
4321 // com.sun.tools.attach.VirtualMachine agent properties support
4322 //
4323 // Initialize the agent properties with the properties maintained in the VM
4324 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4325 JVMWrapper("JVM_InitAgentProperties");
4326 ResourceMark rm;
4328 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4330 PUTPROP(props, "sun.java.command", Arguments::java_command());
4331 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4332 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4333 return properties;
4334 JVM_END
4336 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4337 {
4338 JVMWrapper("JVM_GetEnclosingMethodInfo");
4339 JvmtiVMObjectAllocEventCollector oam;
4341 if (ofClass == NULL) {
4342 return NULL;
4343 }
4344 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4345 // Special handling for primitive objects
4346 if (java_lang_Class::is_primitive(mirror())) {
4347 return NULL;
4348 }
4349 Klass* k = java_lang_Class::as_Klass(mirror());
4350 if (!k->oop_is_instance()) {
4351 return NULL;
4352 }
4353 instanceKlassHandle ik_h(THREAD, k);
4354 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4355 if (encl_method_class_idx == 0) {
4356 return NULL;
4357 }
4358 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4359 objArrayHandle dest(THREAD, dest_o);
4360 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4361 dest->obj_at_put(0, enc_k->java_mirror());
4362 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4363 if (encl_method_method_idx != 0) {
4364 Symbol* sym = ik_h->constants()->symbol_at(
4365 extract_low_short_from_int(
4366 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4367 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4368 dest->obj_at_put(1, str());
4369 sym = ik_h->constants()->symbol_at(
4370 extract_high_short_from_int(
4371 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4372 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4373 dest->obj_at_put(2, str());
4374 }
4375 return (jobjectArray) JNIHandles::make_local(dest());
4376 }
4377 JVM_END
4379 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4380 jint javaThreadState))
4381 {
4382 // If new thread states are added in future JDK and VM versions,
4383 // this should check if the JDK version is compatible with thread
4384 // states supported by the VM. Return NULL if not compatible.
4385 //
4386 // This function must map the VM java_lang_Thread::ThreadStatus
4387 // to the Java thread state that the JDK supports.
4388 //
4390 typeArrayHandle values_h;
4391 switch (javaThreadState) {
4392 case JAVA_THREAD_STATE_NEW : {
4393 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4394 values_h = typeArrayHandle(THREAD, r);
4395 values_h->int_at_put(0, java_lang_Thread::NEW);
4396 break;
4397 }
4398 case JAVA_THREAD_STATE_RUNNABLE : {
4399 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4400 values_h = typeArrayHandle(THREAD, r);
4401 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4402 break;
4403 }
4404 case JAVA_THREAD_STATE_BLOCKED : {
4405 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4406 values_h = typeArrayHandle(THREAD, r);
4407 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4408 break;
4409 }
4410 case JAVA_THREAD_STATE_WAITING : {
4411 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4412 values_h = typeArrayHandle(THREAD, r);
4413 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4414 values_h->int_at_put(1, java_lang_Thread::PARKED);
4415 break;
4416 }
4417 case JAVA_THREAD_STATE_TIMED_WAITING : {
4418 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4419 values_h = typeArrayHandle(THREAD, r);
4420 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4421 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4422 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4423 break;
4424 }
4425 case JAVA_THREAD_STATE_TERMINATED : {
4426 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4427 values_h = typeArrayHandle(THREAD, r);
4428 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4429 break;
4430 }
4431 default:
4432 // Unknown state - probably incompatible JDK version
4433 return NULL;
4434 }
4436 return (jintArray) JNIHandles::make_local(env, values_h());
4437 }
4438 JVM_END
4441 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4442 jint javaThreadState,
4443 jintArray values))
4444 {
4445 // If new thread states are added in future JDK and VM versions,
4446 // this should check if the JDK version is compatible with thread
4447 // states supported by the VM. Return NULL if not compatible.
4448 //
4449 // This function must map the VM java_lang_Thread::ThreadStatus
4450 // to the Java thread state that the JDK supports.
4451 //
4453 ResourceMark rm;
4455 // Check if threads is null
4456 if (values == NULL) {
4457 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4458 }
4460 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4461 typeArrayHandle values_h(THREAD, v);
4463 objArrayHandle names_h;
4464 switch (javaThreadState) {
4465 case JAVA_THREAD_STATE_NEW : {
4466 assert(values_h->length() == 1 &&
4467 values_h->int_at(0) == java_lang_Thread::NEW,
4468 "Invalid threadStatus value");
4470 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4471 1, /* only 1 substate */
4472 CHECK_NULL);
4473 names_h = objArrayHandle(THREAD, r);
4474 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4475 names_h->obj_at_put(0, name());
4476 break;
4477 }
4478 case JAVA_THREAD_STATE_RUNNABLE : {
4479 assert(values_h->length() == 1 &&
4480 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4481 "Invalid threadStatus value");
4483 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4484 1, /* only 1 substate */
4485 CHECK_NULL);
4486 names_h = objArrayHandle(THREAD, r);
4487 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4488 names_h->obj_at_put(0, name());
4489 break;
4490 }
4491 case JAVA_THREAD_STATE_BLOCKED : {
4492 assert(values_h->length() == 1 &&
4493 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4494 "Invalid threadStatus value");
4496 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4497 1, /* only 1 substate */
4498 CHECK_NULL);
4499 names_h = objArrayHandle(THREAD, r);
4500 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4501 names_h->obj_at_put(0, name());
4502 break;
4503 }
4504 case JAVA_THREAD_STATE_WAITING : {
4505 assert(values_h->length() == 2 &&
4506 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4507 values_h->int_at(1) == java_lang_Thread::PARKED,
4508 "Invalid threadStatus value");
4509 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4510 2, /* number of substates */
4511 CHECK_NULL);
4512 names_h = objArrayHandle(THREAD, r);
4513 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4514 CHECK_NULL);
4515 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4516 CHECK_NULL);
4517 names_h->obj_at_put(0, name0());
4518 names_h->obj_at_put(1, name1());
4519 break;
4520 }
4521 case JAVA_THREAD_STATE_TIMED_WAITING : {
4522 assert(values_h->length() == 3 &&
4523 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4524 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4525 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4526 "Invalid threadStatus value");
4527 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4528 3, /* number of substates */
4529 CHECK_NULL);
4530 names_h = objArrayHandle(THREAD, r);
4531 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4532 CHECK_NULL);
4533 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4534 CHECK_NULL);
4535 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4536 CHECK_NULL);
4537 names_h->obj_at_put(0, name0());
4538 names_h->obj_at_put(1, name1());
4539 names_h->obj_at_put(2, name2());
4540 break;
4541 }
4542 case JAVA_THREAD_STATE_TERMINATED : {
4543 assert(values_h->length() == 1 &&
4544 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4545 "Invalid threadStatus value");
4546 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4547 1, /* only 1 substate */
4548 CHECK_NULL);
4549 names_h = objArrayHandle(THREAD, r);
4550 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4551 names_h->obj_at_put(0, name());
4552 break;
4553 }
4554 default:
4555 // Unknown state - probably incompatible JDK version
4556 return NULL;
4557 }
4558 return (jobjectArray) JNIHandles::make_local(env, names_h());
4559 }
4560 JVM_END
4562 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4563 {
4564 memset(info, 0, info_size);
4566 info->jvm_version = Abstract_VM_Version::jvm_version();
4567 info->update_version = 0; /* 0 in HotSpot Express VM */
4568 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4570 // when we add a new capability in the jvm_version_info struct, we should also
4571 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4572 // counter defined in runtimeService.cpp.
4573 info->is_attachable = AttachListener::is_attach_supported();
4574 }
4575 JVM_END