Thu, 21 Aug 2008 23:36:31 -0400
Merge
1 /*
2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_jvm.cpp.incl"
27 #include <errno.h>
29 /*
30 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
31 such ctors and calls MUST NOT come between an oop declaration/init and its
32 usage because if objects are move this may cause various memory stomps, bus
33 errors and segfaults. Here is a cookbook for causing so called "naked oop
34 failures":
36 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
37 JVMWrapper("JVM_GetClassDeclaredFields");
39 // Object address to be held directly in mirror & not visible to GC
40 oop mirror = JNIHandles::resolve_non_null(ofClass);
42 // If this ctor can hit a safepoint, moving objects around, then
43 ComplexConstructor foo;
45 // Boom! mirror may point to JUNK instead of the intended object
46 (some dereference of mirror)
48 // Here's another call that may block for GC, making mirror stale
49 MutexLocker ml(some_lock);
51 // And here's an initializer that can result in a stale oop
52 // all in one step.
53 oop o = call_that_can_throw_exception(TRAPS);
56 The solution is to keep the oop declaration BELOW the ctor or function
57 call that might cause a GC, do another resolve to reassign the oop, or
58 consider use of a Handle instead of an oop so there is immunity from object
59 motion. But note that the "QUICK" entries below do not have a handlemark
60 and thus can only support use of handles passed in.
61 */
63 static void trace_class_resolution_impl(klassOop to_class, TRAPS) {
64 ResourceMark rm;
65 int line_number = -1;
66 const char * source_file = NULL;
67 klassOop caller = NULL;
68 JavaThread* jthread = JavaThread::current();
69 if (jthread->has_last_Java_frame()) {
70 vframeStream vfst(jthread);
72 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
73 symbolHandle access_controller = oopFactory::new_symbol_handle("java/security/AccessController", CHECK);
74 klassOop access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
75 symbolHandle privileged_action = oopFactory::new_symbol_handle("java/security/PrivilegedAction", CHECK);
76 klassOop privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
78 methodOop last_caller = NULL;
80 while (!vfst.at_end()) {
81 methodOop m = vfst.method();
82 if (!vfst.method()->method_holder()->klass_part()->is_subclass_of(SystemDictionary::classloader_klass())&&
83 !vfst.method()->method_holder()->klass_part()->is_subclass_of(access_controller_klass) &&
84 !vfst.method()->method_holder()->klass_part()->is_subclass_of(privileged_action_klass)) {
85 break;
86 }
87 last_caller = m;
88 vfst.next();
89 }
90 // if this is called from Class.forName0 and that is called from Class.forName,
91 // then print the caller of Class.forName. If this is Class.loadClass, then print
92 // that caller, otherwise keep quiet since this should be picked up elsewhere.
93 bool found_it = false;
94 if (!vfst.at_end() &&
95 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
96 vfst.method()->name() == vmSymbols::forName0_name()) {
97 vfst.next();
98 if (!vfst.at_end() &&
99 instanceKlass::cast(vfst.method()->method_holder())->name() == vmSymbols::java_lang_Class() &&
100 vfst.method()->name() == vmSymbols::forName_name()) {
101 vfst.next();
102 found_it = true;
103 }
104 } else if (last_caller != NULL &&
105 instanceKlass::cast(last_caller->method_holder())->name() ==
106 vmSymbols::java_lang_ClassLoader() &&
107 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
108 last_caller->name() == vmSymbols::loadClass_name())) {
109 found_it = true;
110 }
111 if (found_it && !vfst.at_end()) {
112 // found the caller
113 caller = vfst.method()->method_holder();
114 line_number = vfst.method()->line_number_from_bci(vfst.bci());
115 symbolOop s = instanceKlass::cast(vfst.method()->method_holder())->source_file_name();
116 if (s != NULL) {
117 source_file = s->as_C_string();
118 }
119 }
120 }
121 if (caller != NULL) {
122 if (to_class != caller) {
123 const char * from = Klass::cast(caller)->external_name();
124 const char * to = Klass::cast(to_class)->external_name();
125 // print in a single call to reduce interleaving between threads
126 if (source_file != NULL) {
127 tty->print("RESOLVE %s %s %s:%d (explicit)\n", from, to, source_file, line_number);
128 } else {
129 tty->print("RESOLVE %s %s (explicit)\n", from, to);
130 }
131 }
132 }
133 }
135 static void trace_class_resolution(klassOop to_class) {
136 EXCEPTION_MARK;
137 trace_class_resolution_impl(to_class, THREAD);
138 if (HAS_PENDING_EXCEPTION) {
139 CLEAR_PENDING_EXCEPTION;
140 }
141 }
143 // Wrapper to trace JVM functions
145 #ifdef ASSERT
146 class JVMTraceWrapper : public StackObj {
147 public:
148 JVMTraceWrapper(const char* format, ...) {
149 if (TraceJVMCalls) {
150 va_list ap;
151 va_start(ap, format);
152 tty->print("JVM ");
153 tty->vprint_cr(format, ap);
154 va_end(ap);
155 }
156 }
157 };
159 Histogram* JVMHistogram;
160 volatile jint JVMHistogram_lock = 0;
162 class JVMHistogramElement : public HistogramElement {
163 public:
164 JVMHistogramElement(const char* name);
165 };
167 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
168 _name = elementName;
169 uintx count = 0;
171 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
172 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
173 count +=1;
174 if ( (WarnOnStalledSpinLock > 0)
175 && (count % WarnOnStalledSpinLock == 0)) {
176 warning("JVMHistogram_lock seems to be stalled");
177 }
178 }
179 }
181 if(JVMHistogram == NULL)
182 JVMHistogram = new Histogram("JVM Call Counts",100);
184 JVMHistogram->add_element(this);
185 Atomic::dec(&JVMHistogram_lock);
186 }
188 #define JVMCountWrapper(arg) \
189 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
190 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
192 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
193 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
194 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
195 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
196 #else
197 #define JVMWrapper(arg1)
198 #define JVMWrapper2(arg1, arg2)
199 #define JVMWrapper3(arg1, arg2, arg3)
200 #define JVMWrapper4(arg1, arg2, arg3, arg4)
201 #endif
204 // Interface version /////////////////////////////////////////////////////////////////////
207 JVM_LEAF(jint, JVM_GetInterfaceVersion())
208 return JVM_INTERFACE_VERSION;
209 JVM_END
212 // java.lang.System //////////////////////////////////////////////////////////////////////
215 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
216 JVMWrapper("JVM_CurrentTimeMillis");
217 return os::javaTimeMillis();
218 JVM_END
220 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
221 JVMWrapper("JVM_NanoTime");
222 return os::javaTimeNanos();
223 JVM_END
226 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
227 jobject dst, jint dst_pos, jint length))
228 JVMWrapper("JVM_ArrayCopy");
229 // Check if we have null pointers
230 if (src == NULL || dst == NULL) {
231 THROW(vmSymbols::java_lang_NullPointerException());
232 }
233 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
234 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
235 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
236 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
237 // Do copy
238 Klass::cast(s->klass())->copy_array(s, src_pos, d, dst_pos, length, thread);
239 JVM_END
242 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
243 JavaValue r(T_OBJECT);
244 // public synchronized Object put(Object key, Object value);
245 HandleMark hm(THREAD);
246 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
247 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
248 JavaCalls::call_virtual(&r,
249 props,
250 KlassHandle(THREAD, SystemDictionary::properties_klass()),
251 vmSymbolHandles::put_name(),
252 vmSymbolHandles::object_object_object_signature(),
253 key_str,
254 value_str,
255 THREAD);
256 }
259 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
262 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
263 JVMWrapper("JVM_InitProperties");
264 ResourceMark rm;
266 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
268 // System property list includes both user set via -D option and
269 // jvm system specific properties.
270 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
271 PUTPROP(props, p->key(), p->value());
272 }
274 // Convert the -XX:MaxDirectMemorySize= command line flag
275 // to the sun.nio.MaxDirectMemorySize property.
276 // Do this after setting user properties to prevent people
277 // from setting the value with a -D option, as requested.
278 {
279 char as_chars[256];
280 jio_snprintf(as_chars, sizeof(as_chars), INTX_FORMAT, MaxDirectMemorySize);
281 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
282 }
284 // JVM monitoring and management support
285 // Add the sun.management.compiler property for the compiler's name
286 {
287 #undef CSIZE
288 #if defined(_LP64) || defined(_WIN64)
289 #define CSIZE "64-Bit "
290 #else
291 #define CSIZE
292 #endif // 64bit
294 #ifdef TIERED
295 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
296 #else
297 #if defined(COMPILER1)
298 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
299 #elif defined(COMPILER2)
300 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
301 #else
302 const char* compiler_name = "";
303 #endif // compilers
304 #endif // TIERED
306 if (*compiler_name != '\0' &&
307 (Arguments::mode() != Arguments::_int)) {
308 PUTPROP(props, "sun.management.compiler", compiler_name);
309 }
310 }
312 return properties;
313 JVM_END
316 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
318 extern volatile jint vm_created;
320 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
321 if (vm_created != 0 && (code == 0)) {
322 // The VM is about to exit. We call back into Java to check whether finalizers should be run
323 Universe::run_finalizers_on_exit();
324 }
325 before_exit(thread);
326 vm_exit(code);
327 JVM_END
330 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
331 before_exit(thread);
332 vm_exit(code);
333 JVM_END
336 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
337 register_on_exit_function(func);
338 JVM_END
341 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
342 JVMWrapper("JVM_GC");
343 if (!DisableExplicitGC) {
344 Universe::heap()->collect(GCCause::_java_lang_system_gc);
345 }
346 JVM_END
349 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
350 JVMWrapper("JVM_MaxObjectInspectionAge");
351 return Universe::heap()->millis_since_last_gc();
352 JVM_END
355 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
356 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
357 JVM_END
360 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
361 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
362 JVM_END
364 static inline jlong convert_size_t_to_jlong(size_t val) {
365 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
366 NOT_LP64 (return (jlong)val;)
367 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
368 }
370 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
371 JVMWrapper("JVM_TotalMemory");
372 size_t n = Universe::heap()->capacity();
373 return convert_size_t_to_jlong(n);
374 JVM_END
377 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
378 JVMWrapper("JVM_FreeMemory");
379 CollectedHeap* ch = Universe::heap();
380 size_t n;
381 {
382 MutexLocker x(Heap_lock);
383 n = ch->capacity() - ch->used();
384 }
385 return convert_size_t_to_jlong(n);
386 JVM_END
389 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
390 JVMWrapper("JVM_MaxMemory");
391 size_t n = Universe::heap()->max_capacity();
392 return convert_size_t_to_jlong(n);
393 JVM_END
396 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
397 JVMWrapper("JVM_ActiveProcessorCount");
398 return os::active_processor_count();
399 JVM_END
403 // java.lang.Throwable //////////////////////////////////////////////////////
406 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
407 JVMWrapper("JVM_FillInStackTrace");
408 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
409 java_lang_Throwable::fill_in_stack_trace(exception);
410 JVM_END
413 JVM_ENTRY(void, JVM_PrintStackTrace(JNIEnv *env, jobject receiver, jobject printable))
414 JVMWrapper("JVM_PrintStackTrace");
415 // Note: This is no longer used in Merlin, but we still support it for compatibility.
416 oop exception = JNIHandles::resolve_non_null(receiver);
417 oop stream = JNIHandles::resolve_non_null(printable);
418 java_lang_Throwable::print_stack_trace(exception, stream);
419 JVM_END
422 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
423 JVMWrapper("JVM_GetStackTraceDepth");
424 oop exception = JNIHandles::resolve(throwable);
425 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
426 JVM_END
429 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
430 JVMWrapper("JVM_GetStackTraceElement");
431 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
432 oop exception = JNIHandles::resolve(throwable);
433 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
434 return JNIHandles::make_local(env, element);
435 JVM_END
438 // java.lang.Object ///////////////////////////////////////////////
441 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
442 JVMWrapper("JVM_IHashCode");
443 // as implemented in the classic virtual machine; return 0 if object is NULL
444 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
445 JVM_END
448 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
449 JVMWrapper("JVM_MonitorWait");
450 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
451 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorWait must apply to an object");
452 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
453 if (JvmtiExport::should_post_monitor_wait()) {
454 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
455 }
456 ObjectSynchronizer::wait(obj, ms, CHECK);
457 JVM_END
460 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
461 JVMWrapper("JVM_MonitorNotify");
462 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
463 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotify must apply to an object");
464 ObjectSynchronizer::notify(obj, CHECK);
465 JVM_END
468 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
469 JVMWrapper("JVM_MonitorNotifyAll");
470 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
471 assert(obj->is_instance() || obj->is_array(), "JVM_MonitorNotifyAll must apply to an object");
472 ObjectSynchronizer::notifyall(obj, CHECK);
473 JVM_END
476 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
477 JVMWrapper("JVM_Clone");
478 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
479 const KlassHandle klass (THREAD, obj->klass());
480 JvmtiVMObjectAllocEventCollector oam;
482 #ifdef ASSERT
483 // Just checking that the cloneable flag is set correct
484 if (obj->is_javaArray()) {
485 guarantee(klass->is_cloneable(), "all arrays are cloneable");
486 } else {
487 guarantee(obj->is_instance(), "should be instanceOop");
488 bool cloneable = klass->is_subtype_of(SystemDictionary::cloneable_klass());
489 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
490 }
491 #endif
493 // Check if class of obj supports the Cloneable interface.
494 // All arrays are considered to be cloneable (See JLS 20.1.5)
495 if (!klass->is_cloneable()) {
496 ResourceMark rm(THREAD);
497 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
498 }
500 // Make shallow object copy
501 const int size = obj->size();
502 oop new_obj = NULL;
503 if (obj->is_javaArray()) {
504 const int length = ((arrayOop)obj())->length();
505 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
506 } else {
507 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
508 }
509 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
510 // is modifying a reference field in the clonee, a non-oop-atomic copy might
511 // be suspended in the middle of copying the pointer and end up with parts
512 // of two different pointers in the field. Subsequent dereferences will crash.
513 // 4846409: an oop-copy of objects with long or double fields or arrays of same
514 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
515 // of oops. We know objects are aligned on a minimum of an jlong boundary.
516 // The same is true of StubRoutines::object_copy and the various oop_copy
517 // variants, and of the code generated by the inline_native_clone intrinsic.
518 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
519 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
520 (size_t)align_object_size(size) / HeapWordsPerLong);
521 // Clear the header
522 new_obj->init_mark();
524 // Store check (mark entire object and let gc sort it out)
525 BarrierSet* bs = Universe::heap()->barrier_set();
526 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
527 bs->write_region(MemRegion((HeapWord*)new_obj, size));
529 // Caution: this involves a java upcall, so the clone should be
530 // "gc-robust" by this stage.
531 if (klass->has_finalizer()) {
532 assert(obj->is_instance(), "should be instanceOop");
533 new_obj = instanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
534 }
536 return JNIHandles::make_local(env, oop(new_obj));
537 JVM_END
539 // java.lang.Compiler ////////////////////////////////////////////////////
541 // The initial cuts of the HotSpot VM will not support JITs, and all existing
542 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
543 // functions are all silently ignored unless JVM warnings are printed.
545 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
546 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
547 JVM_END
550 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
551 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
552 return JNI_FALSE;
553 JVM_END
556 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
557 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
558 return JNI_FALSE;
559 JVM_END
562 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
563 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
564 return JNI_FALSE;
565 JVM_END
568 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
569 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
570 return NULL;
571 JVM_END
574 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
575 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
576 JVM_END
579 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
580 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
581 JVM_END
585 // Error message support //////////////////////////////////////////////////////
587 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
588 JVMWrapper("JVM_GetLastErrorString");
589 return hpi::lasterror(buf, len);
590 JVM_END
593 // java.io.File ///////////////////////////////////////////////////////////////
595 JVM_LEAF(char*, JVM_NativePath(char* path))
596 JVMWrapper2("JVM_NativePath (%s)", path);
597 return hpi::native_path(path);
598 JVM_END
601 // Misc. class handling ///////////////////////////////////////////////////////////
604 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
605 JVMWrapper("JVM_GetCallerClass");
606 klassOop k = thread->security_get_caller_class(depth);
607 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
608 JVM_END
611 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
612 JVMWrapper("JVM_FindPrimitiveClass");
613 oop mirror = NULL;
614 BasicType t = name2type(utf);
615 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
616 mirror = Universe::java_mirror(t);
617 }
618 if (mirror == NULL) {
619 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
620 } else {
621 return (jclass) JNIHandles::make_local(env, mirror);
622 }
623 JVM_END
626 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
627 JVMWrapper("JVM_ResolveClass");
628 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
629 JVM_END
631 // Rationale behind JVM_FindClassFromBootLoader
632 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
633 // b> because of (a) java.dll has a direct dependecy on the unexported
634 // private symbol "_JVM_FindClassFromClassLoader@20".
635 // c> the launcher cannot use the private symbol as it dynamically opens
636 // the entry point, so if something changes, the launcher will fail
637 // unexpectedly at runtime, it is safest for the launcher to dlopen a
638 // stable exported interface.
639 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
640 // signature to change from _JVM_FindClassFromClassLoader@20 to
641 // JVM_FindClassFromClassLoader and will not be backward compatible
642 // with older JDKs.
643 // Thus a public/stable exported entry point is the right solution,
644 // public here means public in linker semantics, and is exported only
645 // to the JDK, and is not intended to be a public API.
647 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
648 const char* name,
649 jboolean throwError))
650 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name,
651 throwError ? "error" : "exception");
652 return JVM_FindClassFromClassLoader(env, name, JNI_FALSE,
653 (jobject)NULL, throwError);
654 JVM_END
656 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
657 jboolean init, jobject loader,
658 jboolean throwError))
659 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
660 throwError ? "error" : "exception");
661 // Java libraries should ensure that name is never null...
662 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
663 // It's impossible to create this class; the name cannot fit
664 // into the constant pool.
665 if (throwError) {
666 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
667 } else {
668 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
669 }
670 }
671 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
672 Handle h_loader(THREAD, JNIHandles::resolve(loader));
673 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
674 Handle(), throwError, thread);
676 if (TraceClassResolution && result != NULL) {
677 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
678 }
680 return result;
681 JVM_END
684 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
685 jboolean init, jclass from))
686 JVMWrapper2("JVM_FindClassFromClass %s", name);
687 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
688 // It's impossible to create this class; the name cannot fit
689 // into the constant pool.
690 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
691 }
692 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
693 oop from_class_oop = JNIHandles::resolve(from);
694 klassOop from_class = (from_class_oop == NULL)
695 ? (klassOop)NULL
696 : java_lang_Class::as_klassOop(from_class_oop);
697 oop class_loader = NULL;
698 oop protection_domain = NULL;
699 if (from_class != NULL) {
700 class_loader = Klass::cast(from_class)->class_loader();
701 protection_domain = Klass::cast(from_class)->protection_domain();
702 }
703 Handle h_loader(THREAD, class_loader);
704 Handle h_prot (THREAD, protection_domain);
705 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
706 h_prot, true, thread);
708 if (TraceClassResolution && result != NULL) {
709 // this function is generally only used for class loading during verification.
710 ResourceMark rm;
711 oop from_mirror = JNIHandles::resolve_non_null(from);
712 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
713 const char * from_name = Klass::cast(from_class)->external_name();
715 oop mirror = JNIHandles::resolve_non_null(result);
716 klassOop to_class = java_lang_Class::as_klassOop(mirror);
717 const char * to = Klass::cast(to_class)->external_name();
718 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
719 }
721 return result;
722 JVM_END
724 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
725 if (loader.is_null()) {
726 return;
727 }
729 // check whether the current caller thread holds the lock or not.
730 // If not, increment the corresponding counter
731 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
732 ObjectSynchronizer::owner_self) {
733 counter->inc();
734 }
735 }
737 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
738 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) {
740 // Since exceptions can be thrown, class initialization can take place
741 // if name is NULL no check for class name in .class stream has to be made.
742 symbolHandle class_name;
743 if (name != NULL) {
744 const int str_len = (int)strlen(name);
745 if (str_len > symbolOopDesc::max_length()) {
746 // It's impossible to create this class; the name cannot fit
747 // into the constant pool.
748 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
749 }
750 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
751 }
753 ResourceMark rm(THREAD);
754 ClassFileStream st((u1*) buf, len, (char *)source);
755 Handle class_loader (THREAD, JNIHandles::resolve(loader));
756 if (UsePerfData) {
757 is_lock_held_by_thread(class_loader,
758 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
759 THREAD);
760 }
761 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
762 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
763 protection_domain, &st,
764 CHECK_NULL);
766 if (TraceClassResolution && k != NULL) {
767 trace_class_resolution(k);
768 }
770 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
771 }
774 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
775 JVMWrapper2("JVM_DefineClass %s", name);
777 return jvm_define_class_common(env, name, loader, buf, len, pd, "__JVM_DefineClass__", THREAD);
778 JVM_END
781 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
782 JVMWrapper2("JVM_DefineClassWithSource %s", name);
784 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
785 JVM_END
788 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
789 JVMWrapper("JVM_FindLoadedClass");
790 ResourceMark rm(THREAD);
792 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
793 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
795 const char* str = java_lang_String::as_utf8_string(string());
796 // Sanity check, don't expect null
797 if (str == NULL) return NULL;
799 const int str_len = (int)strlen(str);
800 if (str_len > symbolOopDesc::max_length()) {
801 // It's impossible to create this class; the name cannot fit
802 // into the constant pool.
803 return NULL;
804 }
805 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
807 // Security Note:
808 // The Java level wrapper will perform the necessary security check allowing
809 // us to pass the NULL as the initiating class loader.
810 Handle h_loader(THREAD, JNIHandles::resolve(loader));
811 if (UsePerfData) {
812 is_lock_held_by_thread(h_loader,
813 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
814 THREAD);
815 }
817 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
818 h_loader,
819 Handle(),
820 CHECK_NULL);
822 return (k == NULL) ? NULL :
823 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
824 JVM_END
827 // Reflection support //////////////////////////////////////////////////////////////////////////////
829 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
830 assert (cls != NULL, "illegal class");
831 JVMWrapper("JVM_GetClassName");
832 JvmtiVMObjectAllocEventCollector oam;
833 ResourceMark rm(THREAD);
834 const char* name;
835 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
836 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
837 } else {
838 // Consider caching interned string in Klass
839 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
840 assert(k->is_klass(), "just checking");
841 name = Klass::cast(k)->external_name();
842 }
843 oop result = StringTable::intern((char*) name, CHECK_NULL);
844 return (jstring) JNIHandles::make_local(env, result);
845 JVM_END
848 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
849 JVMWrapper("JVM_GetClassInterfaces");
850 JvmtiVMObjectAllocEventCollector oam;
851 oop mirror = JNIHandles::resolve_non_null(cls);
853 // Special handling for primitive objects
854 if (java_lang_Class::is_primitive(mirror)) {
855 // Primitive objects does not have any interfaces
856 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
857 return (jobjectArray) JNIHandles::make_local(env, r);
858 }
860 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
861 // Figure size of result array
862 int size;
863 if (klass->oop_is_instance()) {
864 size = instanceKlass::cast(klass())->local_interfaces()->length();
865 } else {
866 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
867 size = 2;
868 }
870 // Allocate result array
871 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL);
872 objArrayHandle result (THREAD, r);
873 // Fill in result
874 if (klass->oop_is_instance()) {
875 // Regular instance klass, fill in all local interfaces
876 for (int index = 0; index < size; index++) {
877 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
878 result->obj_at_put(index, Klass::cast(k)->java_mirror());
879 }
880 } else {
881 // All arrays implement java.lang.Cloneable and java.io.Serializable
882 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror());
883 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror());
884 }
885 return (jobjectArray) JNIHandles::make_local(env, result());
886 JVM_END
889 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
890 JVMWrapper("JVM_GetClassLoader");
891 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
892 return NULL;
893 }
894 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
895 oop loader = Klass::cast(k)->class_loader();
896 return JNIHandles::make_local(env, loader);
897 JVM_END
900 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
901 JVMWrapper("JVM_IsInterface");
902 oop mirror = JNIHandles::resolve_non_null(cls);
903 if (java_lang_Class::is_primitive(mirror)) {
904 return JNI_FALSE;
905 }
906 klassOop k = java_lang_Class::as_klassOop(mirror);
907 jboolean result = Klass::cast(k)->is_interface();
908 assert(!result || Klass::cast(k)->oop_is_instance(),
909 "all interfaces are instance types");
910 // The compiler intrinsic for isInterface tests the
911 // Klass::_access_flags bits in the same way.
912 return result;
913 JVM_END
916 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
917 JVMWrapper("JVM_GetClassSigners");
918 JvmtiVMObjectAllocEventCollector oam;
919 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
920 // There are no signers for primitive types
921 return NULL;
922 }
924 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
925 objArrayOop signers = NULL;
926 if (Klass::cast(k)->oop_is_instance()) {
927 signers = instanceKlass::cast(k)->signers();
928 }
930 // If there are no signers set in the class, or if the class
931 // is an array, return NULL.
932 if (signers == NULL) return NULL;
934 // copy of the signers array
935 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
936 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
937 for (int index = 0; index < signers->length(); index++) {
938 signers_copy->obj_at_put(index, signers->obj_at(index));
939 }
941 // return the copy
942 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
943 JVM_END
946 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
947 JVMWrapper("JVM_SetClassSigners");
948 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
949 // This call is ignored for primitive types and arrays.
950 // Signers are only set once, ClassLoader.java, and thus shouldn't
951 // be called with an array. Only the bootstrap loader creates arrays.
952 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
953 if (Klass::cast(k)->oop_is_instance()) {
954 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
955 }
956 }
957 JVM_END
960 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
961 JVMWrapper("JVM_GetProtectionDomain");
962 if (JNIHandles::resolve(cls) == NULL) {
963 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
964 }
966 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
967 // Primitive types does not have a protection domain.
968 return NULL;
969 }
971 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
972 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
973 JVM_END
976 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
977 // still defined in core libraries as of 1.5.
978 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
979 JVMWrapper("JVM_SetProtectionDomain");
980 if (JNIHandles::resolve(cls) == NULL) {
981 THROW(vmSymbols::java_lang_NullPointerException());
982 }
983 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
984 // Call is ignored for primitive types
985 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
987 // cls won't be an array, as this called only from ClassLoader.defineClass
988 if (Klass::cast(k)->oop_is_instance()) {
989 oop pd = JNIHandles::resolve(protection_domain);
990 assert(pd == NULL || pd->is_oop(), "just checking");
991 instanceKlass::cast(k)->set_protection_domain(pd);
992 }
993 }
994 JVM_END
997 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
998 JVMWrapper("JVM_DoPrivileged");
1000 if (action == NULL) {
1001 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1002 }
1004 // Stack allocated list of privileged stack elements
1005 PrivilegedElement pi;
1007 // Check that action object understands "Object run()"
1008 Handle object (THREAD, JNIHandles::resolve(action));
1010 // get run() method
1011 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1012 vmSymbols::run_method_name(),
1013 vmSymbols::void_object_signature());
1014 methodHandle m (THREAD, m_oop);
1015 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1016 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1017 }
1019 // Compute the frame initiating the do privileged operation and setup the privileged stack
1020 vframeStream vfst(thread);
1021 vfst.security_get_caller_frame(1);
1023 if (!vfst.at_end()) {
1024 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1025 thread->set_privileged_stack_top(&pi);
1026 }
1029 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1030 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1031 Handle pending_exception;
1032 JavaValue result(T_OBJECT);
1033 JavaCallArguments args(object);
1034 JavaCalls::call(&result, m, &args, THREAD);
1036 // done with action, remove ourselves from the list
1037 if (!vfst.at_end()) {
1038 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1039 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1040 }
1042 if (HAS_PENDING_EXCEPTION) {
1043 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1044 CLEAR_PENDING_EXCEPTION;
1046 if ( pending_exception->is_a(SystemDictionary::exception_klass()) &&
1047 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) {
1048 // Throw a java.security.PrivilegedActionException(Exception e) exception
1049 JavaCallArguments args(pending_exception);
1050 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1051 vmSymbolHandles::exception_void_signature(),
1052 &args);
1053 }
1054 }
1056 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1057 return JNIHandles::make_local(env, (oop) result.get_jobject());
1058 JVM_END
1061 // Returns the inherited_access_control_context field of the running thread.
1062 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1063 JVMWrapper("JVM_GetInheritedAccessControlContext");
1064 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1065 return JNIHandles::make_local(env, result);
1066 JVM_END
1068 class RegisterArrayForGC {
1069 private:
1070 JavaThread *_thread;
1071 public:
1072 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1073 _thread = thread;
1074 _thread->register_array_for_gc(array);
1075 }
1077 ~RegisterArrayForGC() {
1078 _thread->register_array_for_gc(NULL);
1079 }
1080 };
1083 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1084 JVMWrapper("JVM_GetStackAccessControlContext");
1085 if (!UsePrivilegedStack) return NULL;
1087 ResourceMark rm(THREAD);
1088 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1089 JvmtiVMObjectAllocEventCollector oam;
1091 // count the protection domains on the execution stack. We collapse
1092 // duplicate consecutive protection domains into a single one, as
1093 // well as stopping when we hit a privileged frame.
1095 // Use vframeStream to iterate through Java frames
1096 vframeStream vfst(thread);
1098 oop previous_protection_domain = NULL;
1099 Handle privileged_context(thread, NULL);
1100 bool is_privileged = false;
1101 oop protection_domain = NULL;
1103 for(; !vfst.at_end(); vfst.next()) {
1104 // get method of frame
1105 methodOop method = vfst.method();
1106 intptr_t* frame_id = vfst.frame_id();
1108 // check the privileged frames to see if we have a match
1109 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1110 // this frame is privileged
1111 is_privileged = true;
1112 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1113 protection_domain = thread->privileged_stack_top()->protection_domain();
1114 } else {
1115 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1116 }
1118 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1119 local_array->push(protection_domain);
1120 previous_protection_domain = protection_domain;
1121 }
1123 if (is_privileged) break;
1124 }
1127 // either all the domains on the stack were system domains, or
1128 // we had a privileged system domain
1129 if (local_array->is_empty()) {
1130 if (is_privileged && privileged_context.is_null()) return NULL;
1132 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1133 return JNIHandles::make_local(env, result);
1134 }
1136 // the resource area must be registered in case of a gc
1137 RegisterArrayForGC ragc(thread, local_array);
1138 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(),
1139 local_array->length(), CHECK_NULL);
1140 objArrayHandle h_context(thread, context);
1141 for (int index = 0; index < local_array->length(); index++) {
1142 h_context->obj_at_put(index, local_array->at(index));
1143 }
1145 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1147 return JNIHandles::make_local(env, result);
1148 JVM_END
1151 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1152 JVMWrapper("JVM_IsArrayClass");
1153 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1154 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1155 JVM_END
1158 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1159 JVMWrapper("JVM_IsPrimitiveClass");
1160 oop mirror = JNIHandles::resolve_non_null(cls);
1161 return (jboolean) java_lang_Class::is_primitive(mirror);
1162 JVM_END
1165 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1166 JVMWrapper("JVM_GetComponentType");
1167 oop mirror = JNIHandles::resolve_non_null(cls);
1168 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1169 return (jclass) JNIHandles::make_local(env, result);
1170 JVM_END
1173 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1174 JVMWrapper("JVM_GetClassModifiers");
1175 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1176 // Primitive type
1177 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1178 }
1180 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1181 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1182 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1183 return k->modifier_flags();
1184 JVM_END
1187 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1189 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1190 const int inner_class_info_index = 0;
1191 const int outer_class_info_index = 1;
1193 JvmtiVMObjectAllocEventCollector oam;
1194 // ofClass is a reference to a java_lang_Class object. The mirror object
1195 // of an instanceKlass
1197 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1198 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1199 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1200 return (jobjectArray)JNIHandles::make_local(env, result);
1201 }
1203 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1205 if (k->inner_classes()->length() == 0) {
1206 // Neither an inner nor outer class
1207 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1208 return (jobjectArray)JNIHandles::make_local(env, result);
1209 }
1211 // find inner class info
1212 typeArrayHandle icls(thread, k->inner_classes());
1213 constantPoolHandle cp(thread, k->constants());
1214 int length = icls->length();
1216 // Allocate temp. result array
1217 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL);
1218 objArrayHandle result (THREAD, r);
1219 int members = 0;
1221 for(int i = 0; i < length; i += 4) {
1222 int ioff = icls->ushort_at(i + inner_class_info_index);
1223 int ooff = icls->ushort_at(i + outer_class_info_index);
1225 if (ioff != 0 && ooff != 0) {
1226 // Check to see if the name matches the class we're looking for
1227 // before attempting to find the class.
1228 if (cp->klass_name_at_matches(k, ooff)) {
1229 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1230 if (outer_klass == k()) {
1231 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1232 instanceKlassHandle inner_klass (THREAD, ik);
1234 // Throws an exception if outer klass has not declared k as
1235 // an inner klass
1236 Reflection::check_for_inner_class(k, inner_klass, CHECK_NULL);
1238 result->obj_at_put(members, inner_klass->java_mirror());
1239 members++;
1240 }
1241 }
1242 }
1243 }
1245 if (members != length) {
1246 // Return array of right length
1247 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL);
1248 for(int i = 0; i < members; i++) {
1249 res->obj_at_put(i, result->obj_at(i));
1250 }
1251 return (jobjectArray)JNIHandles::make_local(env, res);
1252 }
1254 return (jobjectArray)JNIHandles::make_local(env, result());
1255 JVM_END
1258 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1259 const int inner_class_info_index = 0;
1260 const int outer_class_info_index = 1;
1262 // ofClass is a reference to a java_lang_Class object.
1263 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1264 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1265 return NULL;
1266 }
1268 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1270 if (k->inner_classes()->length() == 0) {
1271 // No inner class info => no declaring class
1272 return NULL;
1273 }
1275 typeArrayHandle i_icls(thread, k->inner_classes());
1276 constantPoolHandle i_cp(thread, k->constants());
1277 int i_length = i_icls->length();
1279 bool found = false;
1280 klassOop ok;
1281 instanceKlassHandle outer_klass;
1283 // Find inner_klass attribute
1284 for(int i = 0; i < i_length && !found; i+= 4) {
1285 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1286 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1288 if (ioff != 0 && ooff != 0) {
1289 // Check to see if the name matches the class we're looking for
1290 // before attempting to find the class.
1291 if (i_cp->klass_name_at_matches(k, ioff)) {
1292 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1293 if (k() == inner_klass) {
1294 found = true;
1295 ok = i_cp->klass_at(ooff, CHECK_NULL);
1296 outer_klass = instanceKlassHandle(thread, ok);
1297 }
1298 }
1299 }
1300 }
1302 // If no inner class attribute found for this class.
1303 if (!found) return NULL;
1305 // Throws an exception if outer klass has not declared k as an inner klass
1306 Reflection::check_for_inner_class(outer_klass, k, CHECK_NULL);
1308 return (jclass)JNIHandles::make_local(env, outer_klass->java_mirror());
1309 JVM_END
1312 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1313 assert (cls != NULL, "illegal class");
1314 JVMWrapper("JVM_GetClassSignature");
1315 JvmtiVMObjectAllocEventCollector oam;
1316 ResourceMark rm(THREAD);
1317 // Return null for arrays and primatives
1318 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1319 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1320 if (Klass::cast(k)->oop_is_instance()) {
1321 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1322 if (sym.is_null()) return NULL;
1323 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1324 return (jstring) JNIHandles::make_local(env, str());
1325 }
1326 }
1327 return NULL;
1328 JVM_END
1331 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1332 assert (cls != NULL, "illegal class");
1333 JVMWrapper("JVM_GetClassAnnotations");
1334 ResourceMark rm(THREAD);
1335 // Return null for arrays and primitives
1336 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1337 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1338 if (Klass::cast(k)->oop_is_instance()) {
1339 return (jbyteArray) JNIHandles::make_local(env,
1340 instanceKlass::cast(k)->class_annotations());
1341 }
1342 }
1343 return NULL;
1344 JVM_END
1347 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1348 assert(field != NULL, "illegal field");
1349 JVMWrapper("JVM_GetFieldAnnotations");
1351 // some of this code was adapted from from jni_FromReflectedField
1353 // field is a handle to a java.lang.reflect.Field object
1354 oop reflected = JNIHandles::resolve_non_null(field);
1355 oop mirror = java_lang_reflect_Field::clazz(reflected);
1356 klassOop k = java_lang_Class::as_klassOop(mirror);
1357 int slot = java_lang_reflect_Field::slot(reflected);
1358 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1360 fieldDescriptor fd;
1361 KlassHandle kh(THREAD, k);
1362 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1364 if (modifiers & JVM_ACC_STATIC) {
1365 // for static fields we only look in the current class
1366 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1367 true, &fd)) {
1368 assert(false, "cannot find static field");
1369 return NULL; // robustness
1370 }
1371 } else {
1372 // for instance fields we start with the current class and work
1373 // our way up through the superclass chain
1374 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1375 &fd)) {
1376 assert(false, "cannot find instance field");
1377 return NULL; // robustness
1378 }
1379 }
1381 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1382 JVM_END
1385 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1386 // some of this code was adapted from from jni_FromReflectedMethod
1388 oop reflected = JNIHandles::resolve_non_null(method);
1389 oop mirror = NULL;
1390 int slot = 0;
1392 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) {
1393 mirror = java_lang_reflect_Constructor::clazz(reflected);
1394 slot = java_lang_reflect_Constructor::slot(reflected);
1395 } else {
1396 assert(reflected->klass() == SystemDictionary::reflect_method_klass(),
1397 "wrong type");
1398 mirror = java_lang_reflect_Method::clazz(reflected);
1399 slot = java_lang_reflect_Method::slot(reflected);
1400 }
1401 klassOop k = java_lang_Class::as_klassOop(mirror);
1403 KlassHandle kh(THREAD, k);
1404 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1405 if (m == NULL) {
1406 assert(false, "cannot find method");
1407 return NULL; // robustness
1408 }
1410 return m;
1411 }
1414 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1415 JVMWrapper("JVM_GetMethodAnnotations");
1417 // method is a handle to a java.lang.reflect.Method object
1418 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1419 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1420 JVM_END
1423 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1424 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1426 // method is a handle to a java.lang.reflect.Method object
1427 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1428 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1429 JVM_END
1432 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1433 JVMWrapper("JVM_GetMethodParameterAnnotations");
1435 // method is a handle to a java.lang.reflect.Method object
1436 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1437 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1438 JVM_END
1441 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1443 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1444 {
1445 JVMWrapper("JVM_GetClassDeclaredFields");
1446 JvmtiVMObjectAllocEventCollector oam;
1448 // Exclude primitive types and array types
1449 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1450 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1451 // Return empty array
1452 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL);
1453 return (jobjectArray) JNIHandles::make_local(env, res);
1454 }
1456 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1457 constantPoolHandle cp(THREAD, k->constants());
1459 // Ensure class is linked
1460 k->link_class(CHECK_NULL);
1462 typeArrayHandle fields(THREAD, k->fields());
1463 int fields_len = fields->length();
1465 // 4496456 We need to filter out java.lang.Throwable.backtrace
1466 bool skip_backtrace = false;
1468 // Allocate result
1469 int num_fields;
1471 if (publicOnly) {
1472 num_fields = 0;
1473 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1474 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1475 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1476 }
1477 } else {
1478 num_fields = fields_len / instanceKlass::next_offset;
1480 if (k() == SystemDictionary::throwable_klass()) {
1481 num_fields--;
1482 skip_backtrace = true;
1483 }
1484 }
1486 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL);
1487 objArrayHandle result (THREAD, r);
1489 int out_idx = 0;
1490 fieldDescriptor fd;
1491 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1492 if (skip_backtrace) {
1493 // 4496456 skip java.lang.Throwable.backtrace
1494 int offset = k->offset_from_fields(i);
1495 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1496 }
1498 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1499 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1500 fd.initialize(k(), i);
1501 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1502 result->obj_at_put(out_idx, field);
1503 ++out_idx;
1504 }
1505 }
1506 assert(out_idx == num_fields, "just checking");
1507 return (jobjectArray) JNIHandles::make_local(env, result());
1508 }
1509 JVM_END
1511 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1512 {
1513 JVMWrapper("JVM_GetClassDeclaredMethods");
1514 JvmtiVMObjectAllocEventCollector oam;
1516 // Exclude primitive types and array types
1517 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1518 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1519 // Return empty array
1520 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL);
1521 return (jobjectArray) JNIHandles::make_local(env, res);
1522 }
1524 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1526 // Ensure class is linked
1527 k->link_class(CHECK_NULL);
1529 objArrayHandle methods (THREAD, k->methods());
1530 int methods_length = methods->length();
1531 int num_methods = 0;
1533 int i;
1534 for (i = 0; i < methods_length; i++) {
1535 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1536 if (!method->is_initializer()) {
1537 if (!publicOnly || method->is_public()) {
1538 ++num_methods;
1539 }
1540 }
1541 }
1543 // Allocate result
1544 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL);
1545 objArrayHandle result (THREAD, r);
1547 int out_idx = 0;
1548 for (i = 0; i < methods_length; i++) {
1549 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1550 if (!method->is_initializer()) {
1551 if (!publicOnly || method->is_public()) {
1552 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1553 result->obj_at_put(out_idx, m);
1554 ++out_idx;
1555 }
1556 }
1557 }
1558 assert(out_idx == num_methods, "just checking");
1559 return (jobjectArray) JNIHandles::make_local(env, result());
1560 }
1561 JVM_END
1563 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1564 {
1565 JVMWrapper("JVM_GetClassDeclaredConstructors");
1566 JvmtiVMObjectAllocEventCollector oam;
1568 // Exclude primitive types and array types
1569 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1570 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1571 // Return empty array
1572 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL);
1573 return (jobjectArray) JNIHandles::make_local(env, res);
1574 }
1576 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1578 // Ensure class is linked
1579 k->link_class(CHECK_NULL);
1581 objArrayHandle methods (THREAD, k->methods());
1582 int methods_length = methods->length();
1583 int num_constructors = 0;
1585 int i;
1586 for (i = 0; i < methods_length; i++) {
1587 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1588 if (method->is_initializer() && !method->is_static()) {
1589 if (!publicOnly || method->is_public()) {
1590 ++num_constructors;
1591 }
1592 }
1593 }
1595 // Allocate result
1596 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL);
1597 objArrayHandle result(THREAD, r);
1599 int out_idx = 0;
1600 for (i = 0; i < methods_length; i++) {
1601 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1602 if (method->is_initializer() && !method->is_static()) {
1603 if (!publicOnly || method->is_public()) {
1604 oop m = Reflection::new_constructor(method, CHECK_NULL);
1605 result->obj_at_put(out_idx, m);
1606 ++out_idx;
1607 }
1608 }
1609 }
1610 assert(out_idx == num_constructors, "just checking");
1611 return (jobjectArray) JNIHandles::make_local(env, result());
1612 }
1613 JVM_END
1615 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1616 {
1617 JVMWrapper("JVM_GetClassAccessFlags");
1618 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1619 // Primitive type
1620 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1621 }
1623 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1624 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1625 }
1626 JVM_END
1629 // Constant pool access //////////////////////////////////////////////////////////
1631 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1632 {
1633 JVMWrapper("JVM_GetClassConstantPool");
1634 JvmtiVMObjectAllocEventCollector oam;
1636 // Return null for primitives and arrays
1637 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1638 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1639 if (Klass::cast(k)->oop_is_instance()) {
1640 instanceKlassHandle k_h(THREAD, k);
1641 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1642 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1643 return JNIHandles::make_local(jcp());
1644 }
1645 }
1646 return NULL;
1647 }
1648 JVM_END
1651 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1652 {
1653 JVMWrapper("JVM_ConstantPoolGetSize");
1654 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1655 return cp->length();
1656 }
1657 JVM_END
1660 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1661 if (!cp->is_within_bounds(index)) {
1662 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1663 }
1664 }
1667 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1668 {
1669 JVMWrapper("JVM_ConstantPoolGetClassAt");
1670 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1671 bounds_check(cp, index, CHECK_NULL);
1672 constantTag tag = cp->tag_at(index);
1673 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1674 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1675 }
1676 klassOop k = cp->klass_at(index, CHECK_NULL);
1677 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1678 }
1679 JVM_END
1682 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1683 {
1684 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1685 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1686 bounds_check(cp, index, CHECK_NULL);
1687 constantTag tag = cp->tag_at(index);
1688 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1689 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1690 }
1691 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1692 if (k == NULL) return NULL;
1693 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1694 }
1695 JVM_END
1697 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1698 constantTag tag = cp->tag_at(index);
1699 if (!tag.is_method() && !tag.is_interface_method()) {
1700 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1701 }
1702 int klass_ref = cp->uncached_klass_ref_index_at(index);
1703 klassOop k_o;
1704 if (force_resolution) {
1705 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1706 } else {
1707 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1708 if (k_o == NULL) return NULL;
1709 }
1710 instanceKlassHandle k(THREAD, k_o);
1711 symbolOop name = cp->uncached_name_ref_at(index);
1712 symbolOop sig = cp->uncached_signature_ref_at(index);
1713 methodHandle m (THREAD, k->find_method(name, sig));
1714 if (m.is_null()) {
1715 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1716 }
1717 oop method;
1718 if (!m->is_initializer() || m->is_static()) {
1719 method = Reflection::new_method(m, true, true, CHECK_NULL);
1720 } else {
1721 method = Reflection::new_constructor(m, CHECK_NULL);
1722 }
1723 return JNIHandles::make_local(method);
1724 }
1726 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1727 {
1728 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1729 JvmtiVMObjectAllocEventCollector oam;
1730 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1731 bounds_check(cp, index, CHECK_NULL);
1732 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1733 return res;
1734 }
1735 JVM_END
1737 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1738 {
1739 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1740 JvmtiVMObjectAllocEventCollector oam;
1741 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1742 bounds_check(cp, index, CHECK_NULL);
1743 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1744 return res;
1745 }
1746 JVM_END
1748 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1749 constantTag tag = cp->tag_at(index);
1750 if (!tag.is_field()) {
1751 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1752 }
1753 int klass_ref = cp->uncached_klass_ref_index_at(index);
1754 klassOop k_o;
1755 if (force_resolution) {
1756 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1757 } else {
1758 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1759 if (k_o == NULL) return NULL;
1760 }
1761 instanceKlassHandle k(THREAD, k_o);
1762 symbolOop name = cp->uncached_name_ref_at(index);
1763 symbolOop sig = cp->uncached_signature_ref_at(index);
1764 fieldDescriptor fd;
1765 klassOop target_klass = k->find_field(name, sig, &fd);
1766 if (target_klass == NULL) {
1767 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1768 }
1769 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1770 return JNIHandles::make_local(field);
1771 }
1773 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1774 {
1775 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1776 JvmtiVMObjectAllocEventCollector oam;
1777 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1778 bounds_check(cp, index, CHECK_NULL);
1779 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1780 return res;
1781 }
1782 JVM_END
1784 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1785 {
1786 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1787 JvmtiVMObjectAllocEventCollector oam;
1788 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1789 bounds_check(cp, index, CHECK_NULL);
1790 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1791 return res;
1792 }
1793 JVM_END
1795 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1796 {
1797 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1798 JvmtiVMObjectAllocEventCollector oam;
1799 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1800 bounds_check(cp, index, CHECK_NULL);
1801 constantTag tag = cp->tag_at(index);
1802 if (!tag.is_field_or_method()) {
1803 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1804 }
1805 int klass_ref = cp->uncached_klass_ref_index_at(index);
1806 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1807 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1808 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1809 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL);
1810 objArrayHandle dest(THREAD, dest_o);
1811 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1812 dest->obj_at_put(0, str());
1813 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1814 dest->obj_at_put(1, str());
1815 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1816 dest->obj_at_put(2, str());
1817 return (jobjectArray) JNIHandles::make_local(dest());
1818 }
1819 JVM_END
1821 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1822 {
1823 JVMWrapper("JVM_ConstantPoolGetIntAt");
1824 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1825 bounds_check(cp, index, CHECK_0);
1826 constantTag tag = cp->tag_at(index);
1827 if (!tag.is_int()) {
1828 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1829 }
1830 return cp->int_at(index);
1831 }
1832 JVM_END
1834 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1835 {
1836 JVMWrapper("JVM_ConstantPoolGetLongAt");
1837 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1838 bounds_check(cp, index, CHECK_(0L));
1839 constantTag tag = cp->tag_at(index);
1840 if (!tag.is_long()) {
1841 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1842 }
1843 return cp->long_at(index);
1844 }
1845 JVM_END
1847 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1848 {
1849 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1850 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1851 bounds_check(cp, index, CHECK_(0.0f));
1852 constantTag tag = cp->tag_at(index);
1853 if (!tag.is_float()) {
1854 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1855 }
1856 return cp->float_at(index);
1857 }
1858 JVM_END
1860 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1861 {
1862 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1863 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1864 bounds_check(cp, index, CHECK_(0.0));
1865 constantTag tag = cp->tag_at(index);
1866 if (!tag.is_double()) {
1867 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1868 }
1869 return cp->double_at(index);
1870 }
1871 JVM_END
1873 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1874 {
1875 JVMWrapper("JVM_ConstantPoolGetStringAt");
1876 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1877 bounds_check(cp, index, CHECK_NULL);
1878 constantTag tag = cp->tag_at(index);
1879 if (!tag.is_string() && !tag.is_unresolved_string()) {
1880 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1881 }
1882 oop str = cp->string_at(index, CHECK_NULL);
1883 return (jstring) JNIHandles::make_local(str);
1884 }
1885 JVM_END
1887 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1888 {
1889 JVMWrapper("JVM_ConstantPoolGetUTF8At");
1890 JvmtiVMObjectAllocEventCollector oam;
1891 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1892 bounds_check(cp, index, CHECK_NULL);
1893 constantTag tag = cp->tag_at(index);
1894 if (!tag.is_symbol()) {
1895 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1896 }
1897 symbolOop sym_o = cp->symbol_at(index);
1898 symbolHandle sym(THREAD, sym_o);
1899 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1900 return (jstring) JNIHandles::make_local(str());
1901 }
1902 JVM_END
1905 // Assertion support. //////////////////////////////////////////////////////////
1907 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
1908 JVMWrapper("JVM_DesiredAssertionStatus");
1909 assert(cls != NULL, "bad class");
1911 oop r = JNIHandles::resolve(cls);
1912 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
1913 if (java_lang_Class::is_primitive(r)) return false;
1915 klassOop k = java_lang_Class::as_klassOop(r);
1916 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
1917 if (! Klass::cast(k)->oop_is_instance()) return false;
1919 ResourceMark rm(THREAD);
1920 const char* name = Klass::cast(k)->name()->as_C_string();
1921 bool system_class = Klass::cast(k)->class_loader() == NULL;
1922 return JavaAssertions::enabled(name, system_class);
1924 JVM_END
1927 // Return a new AssertionStatusDirectives object with the fields filled in with
1928 // command-line assertion arguments (i.e., -ea, -da).
1929 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
1930 JVMWrapper("JVM_AssertionStatusDirectives");
1931 JvmtiVMObjectAllocEventCollector oam;
1932 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
1933 return JNIHandles::make_local(env, asd);
1934 JVM_END
1936 // Verification ////////////////////////////////////////////////////////////////////////////////
1938 // Reflection for the verifier /////////////////////////////////////////////////////////////////
1940 // RedefineClasses support: bug 6214132 caused verification to fail.
1941 // All functions from this section should call the jvmtiThreadSate function:
1942 // klassOop class_to_verify_considering_redefinition(klassOop klass).
1943 // The function returns a klassOop of the _scratch_class if the verifier
1944 // was invoked in the middle of the class redefinition.
1945 // Otherwise it returns its argument value which is the _the_class klassOop.
1946 // Please, refer to the description in the jvmtiThreadSate.hpp.
1948 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
1949 JVMWrapper("JVM_GetClassNameUTF");
1950 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1951 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1952 return Klass::cast(k)->name()->as_utf8();
1953 JVM_END
1956 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
1957 JVMWrapper("JVM_GetClassCPTypes");
1958 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1959 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1960 // types will have length zero if this is not an instanceKlass
1961 // (length is determined by call to JVM_GetClassCPEntriesCount)
1962 if (Klass::cast(k)->oop_is_instance()) {
1963 constantPoolOop cp = instanceKlass::cast(k)->constants();
1964 for (int index = cp->length() - 1; index >= 0; index--) {
1965 constantTag tag = cp->tag_at(index);
1966 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
1967 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
1968 }
1969 }
1970 JVM_END
1973 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
1974 JVMWrapper("JVM_GetClassCPEntriesCount");
1975 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1976 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1977 if (!Klass::cast(k)->oop_is_instance())
1978 return 0;
1979 return instanceKlass::cast(k)->constants()->length();
1980 JVM_END
1983 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
1984 JVMWrapper("JVM_GetClassFieldsCount");
1985 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1986 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1987 if (!Klass::cast(k)->oop_is_instance())
1988 return 0;
1989 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
1990 JVM_END
1993 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
1994 JVMWrapper("JVM_GetClassMethodsCount");
1995 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1996 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1997 if (!Klass::cast(k)->oop_is_instance())
1998 return 0;
1999 return instanceKlass::cast(k)->methods()->length();
2000 JVM_END
2003 // The following methods, used for the verifier, are never called with
2004 // array klasses, so a direct cast to instanceKlass is safe.
2005 // Typically, these methods are called in a loop with bounds determined
2006 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2007 // zero for arrays.
2008 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2009 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2010 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2011 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2012 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2013 int length = methodOop(method)->checked_exceptions_length();
2014 if (length > 0) {
2015 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2016 for (int i = 0; i < length; i++) {
2017 exceptions[i] = table[i].class_cp_index;
2018 }
2019 }
2020 JVM_END
2023 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2024 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2025 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2026 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2027 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2028 return methodOop(method)->checked_exceptions_length();
2029 JVM_END
2032 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2033 JVMWrapper("JVM_GetMethodIxByteCode");
2034 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2035 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2036 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2037 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2038 JVM_END
2041 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2042 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2043 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2044 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2045 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2046 return methodOop(method)->code_size();
2047 JVM_END
2050 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2051 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2052 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2053 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2054 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2055 typeArrayOop extable = methodOop(method)->exception_table();
2056 entry->start_pc = extable->int_at(entry_index * 4);
2057 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2058 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2059 entry->catchType = extable->int_at(entry_index * 4 + 3);
2060 JVM_END
2063 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2064 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2065 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2066 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2067 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2068 return methodOop(method)->exception_table()->length() / 4;
2069 JVM_END
2072 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2073 JVMWrapper("JVM_GetMethodIxModifiers");
2074 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2075 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2076 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2077 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2078 JVM_END
2081 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2082 JVMWrapper("JVM_GetFieldIxModifiers");
2083 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2084 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2085 typeArrayOop fields = instanceKlass::cast(k)->fields();
2086 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2087 JVM_END
2090 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2091 JVMWrapper("JVM_GetMethodIxLocalsCount");
2092 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2093 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2094 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2095 return methodOop(method)->max_locals();
2096 JVM_END
2099 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2100 JVMWrapper("JVM_GetMethodIxArgsSize");
2101 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2102 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2103 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2104 return methodOop(method)->size_of_parameters();
2105 JVM_END
2108 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2109 JVMWrapper("JVM_GetMethodIxMaxStack");
2110 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2111 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2112 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2113 return methodOop(method)->max_stack();
2114 JVM_END
2117 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2118 JVMWrapper("JVM_IsConstructorIx");
2119 ResourceMark rm(THREAD);
2120 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2121 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2122 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2123 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2124 JVM_END
2127 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2128 JVMWrapper("JVM_GetMethodIxIxUTF");
2129 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2130 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2131 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2132 return methodOop(method)->name()->as_utf8();
2133 JVM_END
2136 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2137 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2138 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2139 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2140 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2141 return methodOop(method)->signature()->as_utf8();
2142 JVM_END
2144 /**
2145 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2146 * read entries in the constant pool. Since the old verifier always
2147 * works on a copy of the code, it will not see any rewriting that
2148 * may possibly occur in the middle of verification. So it is important
2149 * that nothing it calls tries to use the cpCache instead of the raw
2150 * constant pool, so we must use cp->uncached_x methods when appropriate.
2151 */
2152 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2153 JVMWrapper("JVM_GetCPFieldNameUTF");
2154 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2155 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2156 constantPoolOop cp = instanceKlass::cast(k)->constants();
2157 switch (cp->tag_at(cp_index).value()) {
2158 case JVM_CONSTANT_Fieldref:
2159 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2160 default:
2161 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2162 }
2163 ShouldNotReachHere();
2164 return NULL;
2165 JVM_END
2168 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2169 JVMWrapper("JVM_GetCPMethodNameUTF");
2170 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2171 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2172 constantPoolOop cp = instanceKlass::cast(k)->constants();
2173 switch (cp->tag_at(cp_index).value()) {
2174 case JVM_CONSTANT_InterfaceMethodref:
2175 case JVM_CONSTANT_Methodref:
2176 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2177 default:
2178 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2179 }
2180 ShouldNotReachHere();
2181 return NULL;
2182 JVM_END
2185 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2186 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2187 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2188 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2189 constantPoolOop cp = instanceKlass::cast(k)->constants();
2190 switch (cp->tag_at(cp_index).value()) {
2191 case JVM_CONSTANT_InterfaceMethodref:
2192 case JVM_CONSTANT_Methodref:
2193 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2194 default:
2195 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2196 }
2197 ShouldNotReachHere();
2198 return NULL;
2199 JVM_END
2202 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2203 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2204 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2205 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2206 constantPoolOop cp = instanceKlass::cast(k)->constants();
2207 switch (cp->tag_at(cp_index).value()) {
2208 case JVM_CONSTANT_Fieldref:
2209 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2210 default:
2211 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2212 }
2213 ShouldNotReachHere();
2214 return NULL;
2215 JVM_END
2218 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2219 JVMWrapper("JVM_GetCPClassNameUTF");
2220 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2221 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2222 constantPoolOop cp = instanceKlass::cast(k)->constants();
2223 symbolOop classname = cp->klass_name_at(cp_index);
2224 return classname->as_utf8();
2225 JVM_END
2228 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2229 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2230 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2232 constantPoolOop cp = instanceKlass::cast(k)->constants();
2233 switch (cp->tag_at(cp_index).value()) {
2234 case JVM_CONSTANT_Fieldref: {
2235 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2236 symbolOop classname = cp->klass_name_at(class_index);
2237 return classname->as_utf8();
2238 }
2239 default:
2240 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2241 }
2242 ShouldNotReachHere();
2243 return NULL;
2244 JVM_END
2247 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2248 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2249 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2250 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2251 constantPoolOop cp = instanceKlass::cast(k)->constants();
2252 switch (cp->tag_at(cp_index).value()) {
2253 case JVM_CONSTANT_Methodref:
2254 case JVM_CONSTANT_InterfaceMethodref: {
2255 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2256 symbolOop classname = cp->klass_name_at(class_index);
2257 return classname->as_utf8();
2258 }
2259 default:
2260 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2261 }
2262 ShouldNotReachHere();
2263 return NULL;
2264 JVM_END
2267 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2268 JVMWrapper("JVM_GetCPFieldModifiers");
2269 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2270 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2271 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2272 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2273 constantPoolOop cp = instanceKlass::cast(k)->constants();
2274 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2275 switch (cp->tag_at(cp_index).value()) {
2276 case JVM_CONSTANT_Fieldref: {
2277 symbolOop name = cp->uncached_name_ref_at(cp_index);
2278 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2279 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2280 int fields_count = fields->length();
2281 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2282 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2283 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2284 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2285 }
2286 }
2287 return -1;
2288 }
2289 default:
2290 fatal("JVM_GetCPFieldModifiers: illegal constant");
2291 }
2292 ShouldNotReachHere();
2293 return 0;
2294 JVM_END
2297 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2298 JVMWrapper("JVM_GetCPMethodModifiers");
2299 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2300 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2301 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2302 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2303 constantPoolOop cp = instanceKlass::cast(k)->constants();
2304 switch (cp->tag_at(cp_index).value()) {
2305 case JVM_CONSTANT_Methodref:
2306 case JVM_CONSTANT_InterfaceMethodref: {
2307 symbolOop name = cp->uncached_name_ref_at(cp_index);
2308 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2309 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2310 int methods_count = methods->length();
2311 for (int i = 0; i < methods_count; i++) {
2312 methodOop method = methodOop(methods->obj_at(i));
2313 if (method->name() == name && method->signature() == signature) {
2314 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2315 }
2316 }
2317 return -1;
2318 }
2319 default:
2320 fatal("JVM_GetCPMethodModifiers: illegal constant");
2321 }
2322 ShouldNotReachHere();
2323 return 0;
2324 JVM_END
2327 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2329 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2330 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2331 JVM_END
2334 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2335 JVMWrapper("JVM_IsSameClassPackage");
2336 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2337 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2338 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2339 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2340 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2341 JVM_END
2344 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2346 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2347 JVMWrapper2("JVM_Open (%s)", fname);
2349 //%note jvm_r6
2350 int result = hpi::open(fname, flags, mode);
2351 if (result >= 0) {
2352 return result;
2353 } else {
2354 switch(errno) {
2355 case EEXIST:
2356 return JVM_EEXIST;
2357 default:
2358 return -1;
2359 }
2360 }
2361 JVM_END
2364 JVM_LEAF(jint, JVM_Close(jint fd))
2365 JVMWrapper2("JVM_Close (0x%x)", fd);
2366 //%note jvm_r6
2367 return hpi::close(fd);
2368 JVM_END
2371 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2372 JVMWrapper2("JVM_Read (0x%x)", fd);
2374 //%note jvm_r6
2375 return (jint)hpi::read(fd, buf, nbytes);
2376 JVM_END
2379 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2380 JVMWrapper2("JVM_Write (0x%x)", fd);
2382 //%note jvm_r6
2383 return (jint)hpi::write(fd, buf, nbytes);
2384 JVM_END
2387 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2388 JVMWrapper2("JVM_Available (0x%x)", fd);
2389 //%note jvm_r6
2390 return hpi::available(fd, pbytes);
2391 JVM_END
2394 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2395 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2396 //%note jvm_r6
2397 return hpi::lseek(fd, offset, whence);
2398 JVM_END
2401 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2402 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2403 return hpi::ftruncate(fd, length);
2404 JVM_END
2407 JVM_LEAF(jint, JVM_Sync(jint fd))
2408 JVMWrapper2("JVM_Sync (0x%x)", fd);
2409 //%note jvm_r6
2410 return hpi::fsync(fd);
2411 JVM_END
2414 // Printing support //////////////////////////////////////////////////
2415 extern "C" {
2417 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2418 // see bug 4399518, 4417214
2419 if ((intptr_t)count <= 0) return -1;
2420 return vsnprintf(str, count, fmt, args);
2421 }
2424 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2425 va_list args;
2426 int len;
2427 va_start(args, fmt);
2428 len = jio_vsnprintf(str, count, fmt, args);
2429 va_end(args);
2430 return len;
2431 }
2434 int jio_fprintf(FILE* f, const char *fmt, ...) {
2435 int len;
2436 va_list args;
2437 va_start(args, fmt);
2438 len = jio_vfprintf(f, fmt, args);
2439 va_end(args);
2440 return len;
2441 }
2444 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2445 if (Arguments::vfprintf_hook() != NULL) {
2446 return Arguments::vfprintf_hook()(f, fmt, args);
2447 } else {
2448 return vfprintf(f, fmt, args);
2449 }
2450 }
2453 int jio_printf(const char *fmt, ...) {
2454 int len;
2455 va_list args;
2456 va_start(args, fmt);
2457 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2458 va_end(args);
2459 return len;
2460 }
2463 // HotSpot specific jio method
2464 void jio_print(const char* s) {
2465 // Try to make this function as atomic as possible.
2466 if (Arguments::vfprintf_hook() != NULL) {
2467 jio_fprintf(defaultStream::output_stream(), "%s", s);
2468 } else {
2469 ::write(defaultStream::output_fd(), s, (int)strlen(s));
2470 }
2471 }
2473 } // Extern C
2475 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2477 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2478 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2479 // OSThread objects. The exception to this rule is when the target object is the thread
2480 // doing the operation, in which case we know that the thread won't exit until the
2481 // operation is done (all exits being voluntary). There are a few cases where it is
2482 // rather silly to do operations on yourself, like resuming yourself or asking whether
2483 // you are alive. While these can still happen, they are not subject to deadlocks if
2484 // the lock is held while the operation occurs (this is not the case for suspend, for
2485 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2486 // implementation is local to this file, we always lock Threads_lock for that one.
2488 static void thread_entry(JavaThread* thread, TRAPS) {
2489 HandleMark hm(THREAD);
2490 Handle obj(THREAD, thread->threadObj());
2491 JavaValue result(T_VOID);
2492 JavaCalls::call_virtual(&result,
2493 obj,
2494 KlassHandle(THREAD, SystemDictionary::thread_klass()),
2495 vmSymbolHandles::run_method_name(),
2496 vmSymbolHandles::void_method_signature(),
2497 THREAD);
2498 }
2501 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2502 JVMWrapper("JVM_StartThread");
2503 JavaThread *native_thread = NULL;
2505 // We cannot hold the Threads_lock when we throw an exception,
2506 // due to rank ordering issues. Example: we might need to grab the
2507 // Heap_lock while we construct the exception.
2508 bool throw_illegal_thread_state = false;
2510 // We must release the Threads_lock before we can post a jvmti event
2511 // in Thread::start.
2512 {
2513 // Ensure that the C++ Thread and OSThread structures aren't freed before
2514 // we operate.
2515 MutexLocker mu(Threads_lock);
2517 // Check to see if we're running a thread that's already exited or was
2518 // stopped (is_stillborn) or is still active (thread is not NULL).
2519 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2520 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2521 throw_illegal_thread_state = true;
2522 } else {
2523 jlong size =
2524 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2525 // Allocate the C++ Thread structure and create the native thread. The
2526 // stack size retrieved from java is signed, but the constructor takes
2527 // size_t (an unsigned type), so avoid passing negative values which would
2528 // result in really large stacks.
2529 size_t sz = size > 0 ? (size_t) size : 0;
2530 native_thread = new JavaThread(&thread_entry, sz);
2532 // At this point it may be possible that no osthread was created for the
2533 // JavaThread due to lack of memory. Check for this situation and throw
2534 // an exception if necessary. Eventually we may want to change this so
2535 // that we only grab the lock if the thread was created successfully -
2536 // then we can also do this check and throw the exception in the
2537 // JavaThread constructor.
2538 if (native_thread->osthread() != NULL) {
2539 // Note: the current thread is not being used within "prepare".
2540 native_thread->prepare(jthread);
2541 }
2542 }
2543 }
2545 if (throw_illegal_thread_state) {
2546 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2547 }
2549 assert(native_thread != NULL, "Starting null thread?");
2551 if (native_thread->osthread() == NULL) {
2552 // No one should hold a reference to the 'native_thread'.
2553 delete native_thread;
2554 if (JvmtiExport::should_post_resource_exhausted()) {
2555 JvmtiExport::post_resource_exhausted(
2556 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2557 "unable to create new native thread");
2558 }
2559 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2560 "unable to create new native thread");
2561 }
2563 Thread::start(native_thread);
2565 JVM_END
2567 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2568 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2569 // but is thought to be reliable and simple. In the case, where the receiver is the
2570 // save thread as the sender, no safepoint is needed.
2571 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2572 JVMWrapper("JVM_StopThread");
2574 oop java_throwable = JNIHandles::resolve(throwable);
2575 if (java_throwable == NULL) {
2576 THROW(vmSymbols::java_lang_NullPointerException());
2577 }
2578 oop java_thread = JNIHandles::resolve_non_null(jthread);
2579 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2580 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2581 // First check if thread already exited
2582 if (receiver != NULL) {
2583 // Check if exception is getting thrown at self (use oop equality, since the
2584 // target object might exit)
2585 if (java_thread == thread->threadObj()) {
2586 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2587 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2588 // threads from being restarted.
2589 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2590 // any effect on the "liveness" of a thread; see
2591 // JVM_IsThreadAlive, below.
2592 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) {
2593 java_lang_Thread::set_stillborn(java_thread);
2594 }
2595 THROW_OOP(java_throwable);
2596 } else {
2597 // Enques a VM_Operation to stop all threads and then deliver the exception...
2598 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2599 }
2600 }
2601 JVM_END
2604 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2605 JVMWrapper("JVM_IsThreadAlive");
2607 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2608 return java_lang_Thread::is_alive(thread_oop);
2609 JVM_END
2612 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2613 JVMWrapper("JVM_SuspendThread");
2614 oop java_thread = JNIHandles::resolve_non_null(jthread);
2615 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2617 if (receiver != NULL) {
2618 // thread has run and has not exited (still on threads list)
2620 {
2621 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2622 if (receiver->is_external_suspend()) {
2623 // Don't allow nested external suspend requests. We can't return
2624 // an error from this interface so just ignore the problem.
2625 return;
2626 }
2627 if (receiver->is_exiting()) { // thread is in the process of exiting
2628 return;
2629 }
2630 receiver->set_external_suspend();
2631 }
2633 // java_suspend() will catch threads in the process of exiting
2634 // and will ignore them.
2635 receiver->java_suspend();
2637 // It would be nice to have the following assertion in all the
2638 // time, but it is possible for a racing resume request to have
2639 // resumed this thread right after we suspended it. Temporarily
2640 // enable this assertion if you are chasing a different kind of
2641 // bug.
2642 //
2643 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2644 // receiver->is_being_ext_suspended(), "thread is not suspended");
2645 }
2646 JVM_END
2649 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2650 JVMWrapper("JVM_ResumeThread");
2651 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2652 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2653 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2654 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2655 // looks at it.
2656 MutexLocker ml(Threads_lock);
2657 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2658 if (thr != NULL) {
2659 // the thread has run and is not in the process of exiting
2660 thr->java_resume();
2661 }
2662 JVM_END
2665 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2666 JVMWrapper("JVM_SetThreadPriority");
2667 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2668 MutexLocker ml(Threads_lock);
2669 oop java_thread = JNIHandles::resolve_non_null(jthread);
2670 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2671 JavaThread* thr = java_lang_Thread::thread(java_thread);
2672 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2673 Thread::set_priority(thr, (ThreadPriority)prio);
2674 }
2675 JVM_END
2678 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2679 JVMWrapper("JVM_Yield");
2680 if (os::dont_yield()) return;
2681 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2682 // Critical for similar threading behaviour
2683 if (ConvertYieldToSleep) {
2684 os::sleep(thread, MinSleepInterval, false);
2685 } else {
2686 os::yield();
2687 }
2688 JVM_END
2691 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2692 JVMWrapper("JVM_Sleep");
2694 if (millis < 0) {
2695 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2696 }
2698 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2699 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2700 }
2702 // Save current thread state and restore it at the end of this block.
2703 // And set new thread state to SLEEPING.
2704 JavaThreadSleepState jtss(thread);
2706 if (millis == 0) {
2707 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2708 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2709 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2710 // for SOLARIS
2711 if (ConvertSleepToYield) {
2712 os::yield();
2713 } else {
2714 ThreadState old_state = thread->osthread()->get_state();
2715 thread->osthread()->set_state(SLEEPING);
2716 os::sleep(thread, MinSleepInterval, false);
2717 thread->osthread()->set_state(old_state);
2718 }
2719 } else {
2720 ThreadState old_state = thread->osthread()->get_state();
2721 thread->osthread()->set_state(SLEEPING);
2722 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2723 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2724 // us while we were sleeping. We do not overwrite those.
2725 if (!HAS_PENDING_EXCEPTION) {
2726 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2727 // to properly restore the thread state. That's likely wrong.
2728 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2729 }
2730 }
2731 thread->osthread()->set_state(old_state);
2732 }
2733 JVM_END
2735 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2736 JVMWrapper("JVM_CurrentThread");
2737 oop jthread = thread->threadObj();
2738 assert (thread != NULL, "no current thread!");
2739 return JNIHandles::make_local(env, jthread);
2740 JVM_END
2743 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2744 JVMWrapper("JVM_CountStackFrames");
2746 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2747 oop java_thread = JNIHandles::resolve_non_null(jthread);
2748 bool throw_illegal_thread_state = false;
2749 int count = 0;
2751 {
2752 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2753 // We need to re-resolve the java_thread, since a GC might have happened during the
2754 // acquire of the lock
2755 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2757 if (thr == NULL) {
2758 // do nothing
2759 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2760 // Check whether this java thread has been suspended already. If not, throws
2761 // IllegalThreadStateException. We defer to throw that exception until
2762 // Threads_lock is released since loading exception class has to leave VM.
2763 // The correct way to test a thread is actually suspended is
2764 // wait_for_ext_suspend_completion(), but we can't call that while holding
2765 // the Threads_lock. The above tests are sufficient for our purposes
2766 // provided the walkability of the stack is stable - which it isn't
2767 // 100% but close enough for most practical purposes.
2768 throw_illegal_thread_state = true;
2769 } else {
2770 // Count all java activation, i.e., number of vframes
2771 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2772 // Native frames are not counted
2773 if (!vfst.method()->is_native()) count++;
2774 }
2775 }
2776 }
2778 if (throw_illegal_thread_state) {
2779 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2780 "this thread is not suspended");
2781 }
2782 return count;
2783 JVM_END
2785 // Consider: A better way to implement JVM_Interrupt() is to acquire
2786 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2787 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2788 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2789 // outside the critical section. Threads_lock is hot so we want to minimize
2790 // the hold-time. A cleaner interface would be to decompose interrupt into
2791 // two steps. The 1st phase, performed under Threads_lock, would return
2792 // a closure that'd be invoked after Threads_lock was dropped.
2793 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2794 // admit spurious wakeups.
2796 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2797 JVMWrapper("JVM_Interrupt");
2799 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2800 oop java_thread = JNIHandles::resolve_non_null(jthread);
2801 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2802 // We need to re-resolve the java_thread, since a GC might have happened during the
2803 // acquire of the lock
2804 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2805 if (thr != NULL) {
2806 Thread::interrupt(thr);
2807 }
2808 JVM_END
2811 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2812 JVMWrapper("JVM_IsInterrupted");
2814 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2815 oop java_thread = JNIHandles::resolve_non_null(jthread);
2816 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2817 // We need to re-resolve the java_thread, since a GC might have happened during the
2818 // acquire of the lock
2819 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2820 if (thr == NULL) {
2821 return JNI_FALSE;
2822 } else {
2823 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2824 }
2825 JVM_END
2828 // Return true iff the current thread has locked the object passed in
2830 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2831 JVMWrapper("JVM_HoldsLock");
2832 assert(THREAD->is_Java_thread(), "sanity check");
2833 if (obj == NULL) {
2834 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2835 }
2836 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2837 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2838 JVM_END
2841 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2842 JVMWrapper("JVM_DumpAllStacks");
2843 VM_PrintThreads op;
2844 VMThread::execute(&op);
2845 if (JvmtiExport::should_post_data_dump()) {
2846 JvmtiExport::post_data_dump();
2847 }
2848 JVM_END
2851 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2853 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2854 assert(jthread->is_Java_thread(), "must be a Java thread");
2855 if (jthread->privileged_stack_top() == NULL) return false;
2856 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2857 oop loader = jthread->privileged_stack_top()->class_loader();
2858 if (loader == NULL) return true;
2859 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
2860 if (trusted) return true;
2861 }
2862 return false;
2863 }
2865 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
2866 JVMWrapper("JVM_CurrentLoadedClass");
2867 ResourceMark rm(THREAD);
2869 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2870 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2871 bool trusted = is_trusted_frame(thread, &vfst);
2872 if (trusted) return NULL;
2874 methodOop m = vfst.method();
2875 if (!m->is_native()) {
2876 klassOop holder = m->method_holder();
2877 oop loader = instanceKlass::cast(holder)->class_loader();
2878 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2879 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
2880 }
2881 }
2882 }
2883 return NULL;
2884 JVM_END
2887 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
2888 JVMWrapper("JVM_CurrentClassLoader");
2889 ResourceMark rm(THREAD);
2891 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2893 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2894 bool trusted = is_trusted_frame(thread, &vfst);
2895 if (trusted) return NULL;
2897 methodOop m = vfst.method();
2898 if (!m->is_native()) {
2899 klassOop holder = m->method_holder();
2900 assert(holder->is_klass(), "just checking");
2901 oop loader = instanceKlass::cast(holder)->class_loader();
2902 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2903 return JNIHandles::make_local(env, loader);
2904 }
2905 }
2906 }
2907 return NULL;
2908 JVM_END
2911 // Utility object for collecting method holders walking down the stack
2912 class KlassLink: public ResourceObj {
2913 public:
2914 KlassHandle klass;
2915 KlassLink* next;
2917 KlassLink(KlassHandle k) { klass = k; next = NULL; }
2918 };
2921 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
2922 JVMWrapper("JVM_GetClassContext");
2923 ResourceMark rm(THREAD);
2924 JvmtiVMObjectAllocEventCollector oam;
2925 // Collect linked list of (handles to) method holders
2926 KlassLink* first = NULL;
2927 KlassLink* last = NULL;
2928 int depth = 0;
2930 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
2931 // Native frames are not returned
2932 if (!vfst.method()->is_native()) {
2933 klassOop holder = vfst.method()->method_holder();
2934 assert(holder->is_klass(), "just checking");
2935 depth++;
2936 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
2937 if (first == NULL) {
2938 first = last = l;
2939 } else {
2940 last->next = l;
2941 last = l;
2942 }
2943 }
2944 }
2946 // Create result array of type [Ljava/lang/Class;
2947 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL);
2948 // Fill in mirrors corresponding to method holders
2949 int index = 0;
2950 while (first != NULL) {
2951 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
2952 first = first->next;
2953 }
2954 assert(index == depth, "just checking");
2956 return (jobjectArray) JNIHandles::make_local(env, result);
2957 JVM_END
2960 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
2961 JVMWrapper("JVM_ClassDepth");
2962 ResourceMark rm(THREAD);
2963 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
2964 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
2966 const char* str = java_lang_String::as_utf8_string(class_name_str());
2967 symbolHandle class_name_sym =
2968 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
2969 if (class_name_sym.is_null()) {
2970 return -1;
2971 }
2973 int depth = 0;
2975 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2976 if (!vfst.method()->is_native()) {
2977 klassOop holder = vfst.method()->method_holder();
2978 assert(holder->is_klass(), "just checking");
2979 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
2980 return depth;
2981 }
2982 depth++;
2983 }
2984 }
2985 return -1;
2986 JVM_END
2989 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
2990 JVMWrapper("JVM_ClassLoaderDepth");
2991 ResourceMark rm(THREAD);
2992 int depth = 0;
2993 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2994 // if a method in a class in a trusted loader is in a doPrivileged, return -1
2995 bool trusted = is_trusted_frame(thread, &vfst);
2996 if (trusted) return -1;
2998 methodOop m = vfst.method();
2999 if (!m->is_native()) {
3000 klassOop holder = m->method_holder();
3001 assert(holder->is_klass(), "just checking");
3002 oop loader = instanceKlass::cast(holder)->class_loader();
3003 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3004 return depth;
3005 }
3006 depth++;
3007 }
3008 }
3009 return -1;
3010 JVM_END
3013 // java.lang.Package ////////////////////////////////////////////////////////////////
3016 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3017 JVMWrapper("JVM_GetSystemPackage");
3018 ResourceMark rm(THREAD);
3019 JvmtiVMObjectAllocEventCollector oam;
3020 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3021 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3022 return (jstring) JNIHandles::make_local(result);
3023 JVM_END
3026 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3027 JVMWrapper("JVM_GetSystemPackages");
3028 JvmtiVMObjectAllocEventCollector oam;
3029 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3030 return (jobjectArray) JNIHandles::make_local(result);
3031 JVM_END
3034 // ObjectInputStream ///////////////////////////////////////////////////////////////
3036 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3037 if (current_class == NULL) {
3038 return true;
3039 }
3040 if ((current_class == field_class) || access.is_public()) {
3041 return true;
3042 }
3044 if (access.is_protected()) {
3045 // See if current_class is a subclass of field_class
3046 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3047 return true;
3048 }
3049 }
3051 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3052 }
3055 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3056 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3057 JVMWrapper("JVM_AllocateNewObject");
3058 JvmtiVMObjectAllocEventCollector oam;
3059 // Receiver is not used
3060 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3061 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3063 // Cannot instantiate primitive types
3064 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3065 ResourceMark rm(THREAD);
3066 THROW_0(vmSymbols::java_lang_InvalidClassException());
3067 }
3069 // Arrays not allowed here, must use JVM_AllocateNewArray
3070 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3071 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3072 ResourceMark rm(THREAD);
3073 THROW_0(vmSymbols::java_lang_InvalidClassException());
3074 }
3076 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3077 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3079 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3081 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3082 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3084 // Make sure klass is initialized, since we are about to instantiate one of them.
3085 curr_klass->initialize(CHECK_NULL);
3087 methodHandle m (THREAD,
3088 init_klass->find_method(vmSymbols::object_initializer_name(),
3089 vmSymbols::void_method_signature()));
3090 if (m.is_null()) {
3091 ResourceMark rm(THREAD);
3092 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3093 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3094 vmSymbols::object_initializer_name(),
3095 vmSymbols::void_method_signature()));
3096 }
3098 if (curr_klass == init_klass && !m->is_public()) {
3099 // Calling the constructor for class 'curr_klass'.
3100 // Only allow calls to a public no-arg constructor.
3101 // This path corresponds to creating an Externalizable object.
3102 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3103 }
3105 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3106 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3107 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3108 }
3110 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3111 // Call constructor m. This might call a constructor higher up in the hierachy
3112 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3114 return JNIHandles::make_local(obj());
3115 JVM_END
3118 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3119 JVMWrapper("JVM_AllocateNewArray");
3120 JvmtiVMObjectAllocEventCollector oam;
3121 oop mirror = JNIHandles::resolve_non_null(currClass);
3123 if (java_lang_Class::is_primitive(mirror)) {
3124 THROW_0(vmSymbols::java_lang_InvalidClassException());
3125 }
3126 klassOop k = java_lang_Class::as_klassOop(mirror);
3127 oop result;
3129 if (k->klass_part()->oop_is_typeArray()) {
3130 // typeArray
3131 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3132 } else if (k->klass_part()->oop_is_objArray()) {
3133 // objArray
3134 objArrayKlassHandle oak(THREAD, k);
3135 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3136 result = oak->allocate(length, CHECK_NULL);
3137 } else {
3138 THROW_0(vmSymbols::java_lang_InvalidClassException());
3139 }
3140 return JNIHandles::make_local(env, result);
3141 JVM_END
3144 // Return the first non-null class loader up the execution stack, or null
3145 // if only code from the null class loader is on the stack.
3147 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3148 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3149 // UseNewReflection
3150 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3151 klassOop holder = vfst.method()->method_holder();
3152 oop loader = instanceKlass::cast(holder)->class_loader();
3153 if (loader != NULL) {
3154 return JNIHandles::make_local(env, loader);
3155 }
3156 }
3157 return NULL;
3158 JVM_END
3161 // Load a class relative to the most recent class on the stack with a non-null
3162 // classloader.
3163 // This function has been deprecated and should not be considered part of the
3164 // specified JVM interface.
3166 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3167 jclass currClass, jstring currClassName))
3168 JVMWrapper("JVM_LoadClass0");
3169 // Receiver is not used
3170 ResourceMark rm(THREAD);
3172 // Class name argument is not guaranteed to be in internal format
3173 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3174 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3176 const char* str = java_lang_String::as_utf8_string(string());
3178 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3179 // It's impossible to create this class; the name cannot fit
3180 // into the constant pool.
3181 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3182 }
3184 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3185 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3186 // Find the most recent class on the stack with a non-null classloader
3187 oop loader = NULL;
3188 oop protection_domain = NULL;
3189 if (curr_klass.is_null()) {
3190 for (vframeStream vfst(thread);
3191 !vfst.at_end() && loader == NULL;
3192 vfst.next()) {
3193 if (!vfst.method()->is_native()) {
3194 klassOop holder = vfst.method()->method_holder();
3195 loader = instanceKlass::cast(holder)->class_loader();
3196 protection_domain = instanceKlass::cast(holder)->protection_domain();
3197 }
3198 }
3199 } else {
3200 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3201 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3202 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3203 }
3204 Handle h_loader(THREAD, loader);
3205 Handle h_prot (THREAD, protection_domain);
3206 return find_class_from_class_loader(env, name, true, h_loader, h_prot,
3207 false, thread);
3208 JVM_END
3211 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3214 // resolve array handle and check arguments
3215 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3216 if (arr == NULL) {
3217 THROW_0(vmSymbols::java_lang_NullPointerException());
3218 }
3219 oop a = JNIHandles::resolve_non_null(arr);
3220 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3221 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3222 }
3223 return arrayOop(a);
3224 }
3227 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3228 JVMWrapper("JVM_GetArrayLength");
3229 arrayOop a = check_array(env, arr, false, CHECK_0);
3230 return a->length();
3231 JVM_END
3234 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3235 JVMWrapper("JVM_Array_Get");
3236 JvmtiVMObjectAllocEventCollector oam;
3237 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3238 jvalue value;
3239 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3240 oop box = Reflection::box(&value, type, CHECK_NULL);
3241 return JNIHandles::make_local(env, box);
3242 JVM_END
3245 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3246 JVMWrapper("JVM_GetPrimitiveArrayElement");
3247 jvalue value;
3248 value.i = 0; // to initialize value before getting used in CHECK
3249 arrayOop a = check_array(env, arr, true, CHECK_(value));
3250 assert(a->is_typeArray(), "just checking");
3251 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3252 BasicType wide_type = (BasicType) wCode;
3253 if (type != wide_type) {
3254 Reflection::widen(&value, type, wide_type, CHECK_(value));
3255 }
3256 return value;
3257 JVM_END
3260 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3261 JVMWrapper("JVM_SetArrayElement");
3262 arrayOop a = check_array(env, arr, false, CHECK);
3263 oop box = JNIHandles::resolve(val);
3264 jvalue value;
3265 value.i = 0; // to initialize value before getting used in CHECK
3266 BasicType value_type;
3267 if (a->is_objArray()) {
3268 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3269 value_type = Reflection::unbox_for_regular_object(box, &value);
3270 } else {
3271 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3272 }
3273 Reflection::array_set(&value, a, index, value_type, CHECK);
3274 JVM_END
3277 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3278 JVMWrapper("JVM_SetPrimitiveArrayElement");
3279 arrayOop a = check_array(env, arr, true, CHECK);
3280 assert(a->is_typeArray(), "just checking");
3281 BasicType value_type = (BasicType) vCode;
3282 Reflection::array_set(&v, a, index, value_type, CHECK);
3283 JVM_END
3286 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3287 JVMWrapper("JVM_NewArray");
3288 JvmtiVMObjectAllocEventCollector oam;
3289 oop element_mirror = JNIHandles::resolve(eltClass);
3290 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3291 return JNIHandles::make_local(env, result);
3292 JVM_END
3295 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3296 JVMWrapper("JVM_NewMultiArray");
3297 JvmtiVMObjectAllocEventCollector oam;
3298 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3299 oop element_mirror = JNIHandles::resolve(eltClass);
3300 assert(dim_array->is_typeArray(), "just checking");
3301 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3302 return JNIHandles::make_local(env, result);
3303 JVM_END
3306 // Networking library support ////////////////////////////////////////////////////////////////////
3308 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3309 JVMWrapper("JVM_InitializeSocketLibrary");
3310 return hpi::initialize_socket_library();
3311 JVM_END
3314 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3315 JVMWrapper("JVM_Socket");
3316 return hpi::socket(domain, type, protocol);
3317 JVM_END
3320 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3321 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3322 //%note jvm_r6
3323 return hpi::socket_close(fd);
3324 JVM_END
3327 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3328 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3329 //%note jvm_r6
3330 return hpi::socket_shutdown(fd, howto);
3331 JVM_END
3334 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3335 JVMWrapper2("JVM_Recv (0x%x)", fd);
3336 //%note jvm_r6
3337 return hpi::recv(fd, buf, nBytes, flags);
3338 JVM_END
3341 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3342 JVMWrapper2("JVM_Send (0x%x)", fd);
3343 //%note jvm_r6
3344 return hpi::send(fd, buf, nBytes, flags);
3345 JVM_END
3348 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3349 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3350 //%note jvm_r6
3351 return hpi::timeout(fd, timeout);
3352 JVM_END
3355 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3356 JVMWrapper2("JVM_Listen (0x%x)", fd);
3357 //%note jvm_r6
3358 return hpi::listen(fd, count);
3359 JVM_END
3362 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3363 JVMWrapper2("JVM_Connect (0x%x)", fd);
3364 //%note jvm_r6
3365 return hpi::connect(fd, him, len);
3366 JVM_END
3369 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3370 JVMWrapper2("JVM_Bind (0x%x)", fd);
3371 //%note jvm_r6
3372 return hpi::bind(fd, him, len);
3373 JVM_END
3376 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3377 JVMWrapper2("JVM_Accept (0x%x)", fd);
3378 //%note jvm_r6
3379 return hpi::accept(fd, him, (int *)len);
3380 JVM_END
3383 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3384 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3385 //%note jvm_r6
3386 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3387 JVM_END
3390 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3391 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3392 //%note jvm_r6
3393 return hpi::get_sock_name(fd, him, len);
3394 JVM_END
3397 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3398 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3399 //%note jvm_r6
3400 return hpi::sendto(fd, buf, len, flags, to, tolen);
3401 JVM_END
3404 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3405 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3406 //%note jvm_r6
3407 return hpi::socket_available(fd, pbytes);
3408 JVM_END
3411 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3412 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3413 //%note jvm_r6
3414 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3415 JVM_END
3418 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3419 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3420 //%note jvm_r6
3421 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3422 JVM_END
3424 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3425 JVMWrapper("JVM_GetHostName");
3426 return hpi::get_host_name(name, namelen);
3427 JVM_END
3429 #ifdef _WINDOWS
3431 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3432 JVMWrapper("JVM_GetHostByAddr");
3433 return hpi::get_host_by_addr(name, len, type);
3434 JVM_END
3437 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3438 JVMWrapper("JVM_GetHostByName");
3439 return hpi::get_host_by_name(name);
3440 JVM_END
3443 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3444 JVMWrapper("JVM_GetProtoByName");
3445 return hpi::get_proto_by_name(name);
3446 JVM_END
3448 #endif
3450 // Library support ///////////////////////////////////////////////////////////////////////////
3452 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3453 //%note jvm_ct
3454 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3455 char ebuf[1024];
3456 void *load_result;
3457 {
3458 ThreadToNativeFromVM ttnfvm(thread);
3459 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3460 }
3461 if (load_result == NULL) {
3462 char msg[1024];
3463 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3464 // Since 'ebuf' may contain a string encoded using
3465 // platform encoding scheme, we need to pass
3466 // Exceptions::unsafe_to_utf8 to the new_exception method
3467 // as the last argument. See bug 6367357.
3468 Handle h_exception =
3469 Exceptions::new_exception(thread,
3470 vmSymbols::java_lang_UnsatisfiedLinkError(),
3471 msg, Exceptions::unsafe_to_utf8);
3473 THROW_HANDLE_0(h_exception);
3474 }
3475 return load_result;
3476 JVM_END
3479 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3480 JVMWrapper("JVM_UnloadLibrary");
3481 hpi::dll_unload(handle);
3482 JVM_END
3485 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3486 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3487 return hpi::dll_lookup(handle, name);
3488 JVM_END
3490 // Floating point support ////////////////////////////////////////////////////////////////////
3492 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3493 JVMWrapper("JVM_IsNaN");
3494 return g_isnan(a);
3495 JVM_END
3499 // JNI version ///////////////////////////////////////////////////////////////////////////////
3501 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3502 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3503 return Threads::is_supported_jni_version_including_1_1(version);
3504 JVM_END
3507 // String support ///////////////////////////////////////////////////////////////////////////
3509 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3510 JVMWrapper("JVM_InternString");
3511 JvmtiVMObjectAllocEventCollector oam;
3512 if (str == NULL) return NULL;
3513 oop string = JNIHandles::resolve_non_null(str);
3514 oop result = StringTable::intern(string, CHECK_NULL);
3515 return (jstring) JNIHandles::make_local(env, result);
3516 JVM_END
3519 // Raw monitor support //////////////////////////////////////////////////////////////////////
3521 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3522 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3523 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3524 // that only works with java threads.
3527 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3528 VM_Exit::block_if_vm_exited();
3529 JVMWrapper("JVM_RawMonitorCreate");
3530 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3531 }
3534 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3535 VM_Exit::block_if_vm_exited();
3536 JVMWrapper("JVM_RawMonitorDestroy");
3537 delete ((Mutex*) mon);
3538 }
3541 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3542 VM_Exit::block_if_vm_exited();
3543 JVMWrapper("JVM_RawMonitorEnter");
3544 ((Mutex*) mon)->jvm_raw_lock();
3545 return 0;
3546 }
3549 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3550 VM_Exit::block_if_vm_exited();
3551 JVMWrapper("JVM_RawMonitorExit");
3552 ((Mutex*) mon)->jvm_raw_unlock();
3553 }
3556 // Support for Serialization
3558 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3559 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3560 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3561 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3563 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3564 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3565 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3566 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3569 void initialize_converter_functions() {
3570 if (JDK_Version::is_gte_jdk14x_version()) {
3571 // These functions only exist for compatibility with 1.3.1 and earlier
3572 return;
3573 }
3575 // called from universe_post_init()
3576 assert(
3577 int_bits_to_float_fn == NULL &&
3578 long_bits_to_double_fn == NULL &&
3579 float_to_int_bits_fn == NULL &&
3580 double_to_long_bits_fn == NULL ,
3581 "initialization done twice"
3582 );
3583 // initialize
3584 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3585 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3586 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3587 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3588 // verify
3589 assert(
3590 int_bits_to_float_fn != NULL &&
3591 long_bits_to_double_fn != NULL &&
3592 float_to_int_bits_fn != NULL &&
3593 double_to_long_bits_fn != NULL ,
3594 "initialization failed"
3595 );
3596 }
3599 // Serialization
3600 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3601 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3602 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3604 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3605 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3606 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3607 oop o = JNIHandles::resolve(obj);
3609 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3610 THROW(vmSymbols::java_lang_NullPointerException());
3611 }
3613 jsize nfids = fids->length();
3614 if (nfids == 0) return;
3616 if (tcodes->length() < nfids) {
3617 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3618 }
3620 jsize off = 0;
3621 /* loop through fields, setting values */
3622 for (jsize i = 0; i < nfids; i++) {
3623 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3624 int field_offset;
3625 if (fid != NULL) {
3626 // NULL is a legal value for fid, but retrieving the field offset
3627 // trigger assertion in that case
3628 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3629 }
3631 switch (tcodes->char_at(i)) {
3632 case 'Z':
3633 if (fid != NULL) {
3634 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3635 o->bool_field_put(field_offset, val);
3636 }
3637 off++;
3638 break;
3640 case 'B':
3641 if (fid != NULL) {
3642 o->byte_field_put(field_offset, dbuf->byte_at(off));
3643 }
3644 off++;
3645 break;
3647 case 'C':
3648 if (fid != NULL) {
3649 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3650 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3651 o->char_field_put(field_offset, val);
3652 }
3653 off += 2;
3654 break;
3656 case 'S':
3657 if (fid != NULL) {
3658 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3659 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3660 o->short_field_put(field_offset, val);
3661 }
3662 off += 2;
3663 break;
3665 case 'I':
3666 if (fid != NULL) {
3667 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3668 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3669 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3670 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3671 o->int_field_put(field_offset, ival);
3672 }
3673 off += 4;
3674 break;
3676 case 'F':
3677 if (fid != NULL) {
3678 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3679 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3680 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3681 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3682 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3683 o->float_field_put(field_offset, fval);
3684 }
3685 off += 4;
3686 break;
3688 case 'J':
3689 if (fid != NULL) {
3690 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3691 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3692 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3693 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3694 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3695 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3696 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3697 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3698 o->long_field_put(field_offset, lval);
3699 }
3700 off += 8;
3701 break;
3703 case 'D':
3704 if (fid != NULL) {
3705 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3706 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3707 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3708 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3709 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3710 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3711 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3712 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3713 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3714 o->double_field_put(field_offset, dval);
3715 }
3716 off += 8;
3717 break;
3719 default:
3720 // Illegal typecode
3721 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3722 }
3723 }
3724 JVM_END
3727 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3728 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3729 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3731 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3732 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3733 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3734 oop o = JNIHandles::resolve(obj);
3736 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3737 THROW(vmSymbols::java_lang_NullPointerException());
3738 }
3740 jsize nfids = fids->length();
3741 if (nfids == 0) return;
3743 if (tcodes->length() < nfids) {
3744 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3745 }
3747 /* loop through fields, fetching values */
3748 jsize off = 0;
3749 for (jsize i = 0; i < nfids; i++) {
3750 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3751 if (fid == NULL) {
3752 THROW(vmSymbols::java_lang_NullPointerException());
3753 }
3754 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3756 switch (tcodes->char_at(i)) {
3757 case 'Z':
3758 {
3759 jboolean val = o->bool_field(field_offset);
3760 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3761 }
3762 break;
3764 case 'B':
3765 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3766 break;
3768 case 'C':
3769 {
3770 jchar val = o->char_field(field_offset);
3771 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3772 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3773 }
3774 break;
3776 case 'S':
3777 {
3778 jshort val = o->short_field(field_offset);
3779 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3780 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3781 }
3782 break;
3784 case 'I':
3785 {
3786 jint val = o->int_field(field_offset);
3787 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3788 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3789 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3790 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3791 }
3792 break;
3794 case 'F':
3795 {
3796 jfloat fval = o->float_field(field_offset);
3797 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3798 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3799 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3800 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3801 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3802 }
3803 break;
3805 case 'J':
3806 {
3807 jlong val = o->long_field(field_offset);
3808 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3809 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3810 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3811 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3812 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3813 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3814 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3815 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3816 }
3817 break;
3819 case 'D':
3820 {
3821 jdouble dval = o->double_field(field_offset);
3822 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3823 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3824 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3825 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3826 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3827 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3828 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3829 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3830 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3831 }
3832 break;
3834 default:
3835 // Illegal typecode
3836 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3837 }
3838 }
3839 JVM_END
3842 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3844 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3845 // Security Note:
3846 // The Java level wrapper will perform the necessary security check allowing
3847 // us to pass the NULL as the initiating class loader.
3848 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3849 KlassHandle klass_handle(THREAD, klass);
3850 // Check if we should initialize the class
3851 if (init && klass_handle->oop_is_instance()) {
3852 klass_handle->initialize(CHECK_NULL);
3853 }
3854 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3855 }
3858 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3860 #ifndef PRODUCT
3862 extern "C" {
3863 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3864 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3865 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3866 }
3868 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3869 JVMWrapper("JVM_AccessBoolVMFlag");
3870 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3871 JVM_END
3873 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3874 JVMWrapper("JVM_AccessVMIntFlag");
3875 intx v;
3876 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
3877 *value = (jint)v;
3878 return result;
3879 JVM_END
3882 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
3883 JVMWrapper("JVM_VMBreakPoint");
3884 oop the_obj = JNIHandles::resolve(obj);
3885 BREAKPOINT;
3886 JVM_END
3889 #endif
3892 //---------------------------------------------------------------------------
3893 //
3894 // Support for old native code-based reflection (pre-JDK 1.4)
3895 // Disabled by default in the product build.
3896 //
3897 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
3898 //
3899 //---------------------------------------------------------------------------
3901 #ifdef SUPPORT_OLD_REFLECTION
3903 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
3904 JVMWrapper("JVM_GetClassFields");
3905 JvmtiVMObjectAllocEventCollector oam;
3906 oop mirror = JNIHandles::resolve_non_null(cls);
3907 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
3908 return (jobjectArray) JNIHandles::make_local(env, result);
3909 JVM_END
3912 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
3913 JVMWrapper("JVM_GetClassMethods");
3914 JvmtiVMObjectAllocEventCollector oam;
3915 oop mirror = JNIHandles::resolve_non_null(cls);
3916 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
3917 //%note jvm_r4
3918 return (jobjectArray) JNIHandles::make_local(env, result);
3919 JVM_END
3922 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
3923 JVMWrapper("JVM_GetClassConstructors");
3924 JvmtiVMObjectAllocEventCollector oam;
3925 oop mirror = JNIHandles::resolve_non_null(cls);
3926 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
3927 //%note jvm_r4
3928 return (jobjectArray) JNIHandles::make_local(env, result);
3929 JVM_END
3932 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
3933 JVMWrapper("JVM_GetClassField");
3934 JvmtiVMObjectAllocEventCollector oam;
3935 if (name == NULL) return NULL;
3936 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3938 const char* cstr = java_lang_String::as_utf8_string(str());
3939 symbolHandle field_name =
3940 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3941 if (field_name.is_null()) {
3942 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3943 }
3945 oop mirror = JNIHandles::resolve_non_null(cls);
3946 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
3947 if (result == NULL) {
3948 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3949 }
3950 return JNIHandles::make_local(env, result);
3951 JVM_END
3954 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
3955 JVMWrapper("JVM_GetClassMethod");
3956 JvmtiVMObjectAllocEventCollector oam;
3957 if (name == NULL) {
3958 THROW_0(vmSymbols::java_lang_NullPointerException());
3959 }
3960 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3962 const char* cstr = java_lang_String::as_utf8_string(str());
3963 symbolHandle method_name =
3964 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3965 if (method_name.is_null()) {
3966 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3967 }
3969 oop mirror = JNIHandles::resolve_non_null(cls);
3970 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
3971 oop result = Reflection::reflect_method(mirror, method_name, tarray,
3972 which, CHECK_NULL);
3973 if (result == NULL) {
3974 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3975 }
3976 return JNIHandles::make_local(env, result);
3977 JVM_END
3980 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
3981 JVMWrapper("JVM_GetClassConstructor");
3982 JvmtiVMObjectAllocEventCollector oam;
3983 oop mirror = JNIHandles::resolve_non_null(cls);
3984 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
3985 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
3986 if (result == NULL) {
3987 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
3988 }
3989 return (jobject) JNIHandles::make_local(env, result);
3990 JVM_END
3993 // Instantiation ///////////////////////////////////////////////////////////////////////////////
3995 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
3996 JVMWrapper("JVM_NewInstance");
3997 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
3999 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4000 if (resolved_constructor == NULL) {
4001 klassOop k = java_lang_Class::as_klassOop(mirror());
4002 // The java.lang.Class object caches a resolved constructor if all the checks
4003 // below were done successfully and a constructor was found.
4005 // Do class based checks
4006 if (java_lang_Class::is_primitive(mirror())) {
4007 const char* msg = "";
4008 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4009 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4010 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4011 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4012 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4013 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4014 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4015 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4016 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4017 }
4019 // Check whether we are allowed to instantiate this class
4020 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4021 instanceKlassHandle klass(THREAD, k);
4022 // Make sure class is initialized (also so all methods are rewritten)
4023 klass->initialize(CHECK_NULL);
4025 // Lookup default constructor
4026 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4027 if (resolved_constructor == NULL) {
4028 ResourceMark rm(THREAD);
4029 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4030 }
4032 // Cache result in java.lang.Class object. Does not have to be MT safe.
4033 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4034 }
4036 assert(resolved_constructor != NULL, "sanity check");
4037 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4039 // We have an initialized instanceKlass with a default constructor
4040 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4041 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4043 // Do security check
4044 klassOop caller_klass = NULL;
4045 if (UsePrivilegedStack) {
4046 caller_klass = thread->security_get_caller_class(2);
4048 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4049 !Reflection::verify_field_access(caller_klass,
4050 klass(),
4051 klass(),
4052 constructor->access_flags(),
4053 false,
4054 true)) {
4055 ResourceMark rm(THREAD);
4056 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4057 }
4058 }
4060 // Allocate object and call constructor
4061 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4062 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4064 jobject res = JNIHandles::make_local(env, receiver());
4065 if (JvmtiExport::should_post_vm_object_alloc()) {
4066 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4067 }
4068 return res;
4069 JVM_END
4072 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4074 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4075 JVMWrapper("JVM_GetField");
4076 JvmtiVMObjectAllocEventCollector oam;
4077 Handle field_mirror(thread, JNIHandles::resolve(field));
4078 Handle receiver (thread, JNIHandles::resolve(obj));
4079 fieldDescriptor fd;
4080 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4081 jvalue value;
4082 BasicType type = Reflection::field_get(&value, &fd, receiver);
4083 oop box = Reflection::box(&value, type, CHECK_NULL);
4084 return JNIHandles::make_local(env, box);
4085 JVM_END
4088 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4089 JVMWrapper("JVM_GetPrimitiveField");
4090 Handle field_mirror(thread, JNIHandles::resolve(field));
4091 Handle receiver (thread, JNIHandles::resolve(obj));
4092 fieldDescriptor fd;
4093 jvalue value;
4094 value.j = 0;
4095 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4096 BasicType type = Reflection::field_get(&value, &fd, receiver);
4097 BasicType wide_type = (BasicType) wCode;
4098 if (type != wide_type) {
4099 Reflection::widen(&value, type, wide_type, CHECK_(value));
4100 }
4101 return value;
4102 JVM_END // should really be JVM_END, but that doesn't work for union types!
4105 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4106 JVMWrapper("JVM_SetField");
4107 Handle field_mirror(thread, JNIHandles::resolve(field));
4108 Handle receiver (thread, JNIHandles::resolve(obj));
4109 oop box = JNIHandles::resolve(val);
4110 fieldDescriptor fd;
4111 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4112 BasicType field_type = fd.field_type();
4113 jvalue value;
4114 BasicType value_type;
4115 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4116 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4117 value_type = Reflection::unbox_for_regular_object(box, &value);
4118 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4119 } else {
4120 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4121 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4122 }
4123 JVM_END
4126 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4127 JVMWrapper("JVM_SetPrimitiveField");
4128 Handle field_mirror(thread, JNIHandles::resolve(field));
4129 Handle receiver (thread, JNIHandles::resolve(obj));
4130 fieldDescriptor fd;
4131 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4132 BasicType value_type = (BasicType) vCode;
4133 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4134 JVM_END
4137 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4139 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4140 JVMWrapper("JVM_InvokeMethod");
4141 Handle method_handle;
4142 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4143 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4144 Handle receiver(THREAD, JNIHandles::resolve(obj));
4145 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4146 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4147 jobject res = JNIHandles::make_local(env, result);
4148 if (JvmtiExport::should_post_vm_object_alloc()) {
4149 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4150 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4151 if (java_lang_Class::is_primitive(ret_type)) {
4152 // Only for primitive type vm allocates memory for java object.
4153 // See box() method.
4154 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4155 }
4156 }
4157 return res;
4158 } else {
4159 THROW_0(vmSymbols::java_lang_StackOverflowError());
4160 }
4161 JVM_END
4164 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4165 JVMWrapper("JVM_NewInstanceFromConstructor");
4166 oop constructor_mirror = JNIHandles::resolve(c);
4167 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4168 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4169 jobject res = JNIHandles::make_local(env, result);
4170 if (JvmtiExport::should_post_vm_object_alloc()) {
4171 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4172 }
4173 return res;
4174 JVM_END
4176 #endif /* SUPPORT_OLD_REFLECTION */
4178 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4180 JVM_LEAF(jboolean, JVM_SupportsCX8())
4181 JVMWrapper("JVM_SupportsCX8");
4182 return VM_Version::supports_cx8();
4183 JVM_END
4186 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4187 JVMWrapper("JVM_CX8Field");
4188 jlong res;
4189 oop o = JNIHandles::resolve(obj);
4190 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4191 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4193 assert(VM_Version::supports_cx8(), "cx8 not supported");
4194 res = Atomic::cmpxchg(newVal, addr, oldVal);
4196 return res == oldVal;
4197 JVM_END
4199 // DTrace ///////////////////////////////////////////////////////////////////
4201 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4202 JVMWrapper("JVM_DTraceGetVersion");
4203 return (jint)JVM_TRACING_DTRACE_VERSION;
4204 JVM_END
4206 JVM_ENTRY(jlong,JVM_DTraceActivate(
4207 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4208 JVM_DTraceProvider* providers))
4209 JVMWrapper("JVM_DTraceActivate");
4210 return DTraceJSDT::activate(
4211 version, module_name, providers_count, providers, CHECK_0);
4212 JVM_END
4214 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4215 JVMWrapper("JVM_DTraceIsProbeEnabled");
4216 return DTraceJSDT::is_probe_enabled(method);
4217 JVM_END
4219 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4220 JVMWrapper("JVM_DTraceDispose");
4221 DTraceJSDT::dispose(handle);
4222 JVM_END
4224 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4225 JVMWrapper("JVM_DTraceIsSupported");
4226 return DTraceJSDT::is_supported();
4227 JVM_END
4229 // Returns an array of all live Thread objects (VM internal JavaThreads,
4230 // jvmti agent threads, and JNI attaching threads are skipped)
4231 // See CR 6404306 regarding JNI attaching threads
4232 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4233 ResourceMark rm(THREAD);
4234 ThreadsListEnumerator tle(THREAD, false, false);
4235 JvmtiVMObjectAllocEventCollector oam;
4237 int num_threads = tle.num_threads();
4238 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL);
4239 objArrayHandle threads_ah(THREAD, r);
4241 for (int i = 0; i < num_threads; i++) {
4242 Handle h = tle.get_threadObj(i);
4243 threads_ah->obj_at_put(i, h());
4244 }
4246 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4247 JVM_END
4250 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4251 // Return StackTraceElement[][], each element is the stack trace of a thread in
4252 // the corresponding entry in the given threads array
4253 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4254 JVMWrapper("JVM_DumpThreads");
4255 JvmtiVMObjectAllocEventCollector oam;
4257 // Check if threads is null
4258 if (threads == NULL) {
4259 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4260 }
4262 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4263 objArrayHandle ah(THREAD, a);
4264 int num_threads = ah->length();
4265 // check if threads is non-empty array
4266 if (num_threads == 0) {
4267 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4268 }
4270 // check if threads is not an array of objects of Thread class
4271 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4272 if (k != SystemDictionary::thread_klass()) {
4273 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4274 }
4276 ResourceMark rm(THREAD);
4278 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4279 for (int i = 0; i < num_threads; i++) {
4280 oop thread_obj = ah->obj_at(i);
4281 instanceHandle h(THREAD, (instanceOop) thread_obj);
4282 thread_handle_array->append(h);
4283 }
4285 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4286 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4288 JVM_END
4290 // JVM monitoring and management support
4291 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4292 return Management::get_jmm_interface(version);
4293 JVM_END
4295 // com.sun.tools.attach.VirtualMachine agent properties support
4296 //
4297 // Initialize the agent properties with the properties maintained in the VM
4298 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4299 JVMWrapper("JVM_InitAgentProperties");
4300 ResourceMark rm;
4302 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4304 PUTPROP(props, "sun.java.command", Arguments::java_command());
4305 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4306 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4307 return properties;
4308 JVM_END
4310 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4311 {
4312 JVMWrapper("JVM_GetEnclosingMethodInfo");
4313 JvmtiVMObjectAllocEventCollector oam;
4315 if (ofClass == NULL) {
4316 return NULL;
4317 }
4318 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4319 // Special handling for primitive objects
4320 if (java_lang_Class::is_primitive(mirror())) {
4321 return NULL;
4322 }
4323 klassOop k = java_lang_Class::as_klassOop(mirror());
4324 if (!Klass::cast(k)->oop_is_instance()) {
4325 return NULL;
4326 }
4327 instanceKlassHandle ik_h(THREAD, k);
4328 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4329 if (encl_method_class_idx == 0) {
4330 return NULL;
4331 }
4332 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL);
4333 objArrayHandle dest(THREAD, dest_o);
4334 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4335 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4336 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4337 if (encl_method_method_idx != 0) {
4338 symbolOop sym_o = ik_h->constants()->symbol_at(
4339 extract_low_short_from_int(
4340 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4341 symbolHandle sym(THREAD, sym_o);
4342 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4343 dest->obj_at_put(1, str());
4344 sym_o = ik_h->constants()->symbol_at(
4345 extract_high_short_from_int(
4346 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4347 sym = symbolHandle(THREAD, sym_o);
4348 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4349 dest->obj_at_put(2, str());
4350 }
4351 return (jobjectArray) JNIHandles::make_local(dest());
4352 }
4353 JVM_END
4355 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4356 jint javaThreadState))
4357 {
4358 // If new thread states are added in future JDK and VM versions,
4359 // this should check if the JDK version is compatible with thread
4360 // states supported by the VM. Return NULL if not compatible.
4361 //
4362 // This function must map the VM java_lang_Thread::ThreadStatus
4363 // to the Java thread state that the JDK supports.
4364 //
4366 typeArrayHandle values_h;
4367 switch (javaThreadState) {
4368 case JAVA_THREAD_STATE_NEW : {
4369 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4370 values_h = typeArrayHandle(THREAD, r);
4371 values_h->int_at_put(0, java_lang_Thread::NEW);
4372 break;
4373 }
4374 case JAVA_THREAD_STATE_RUNNABLE : {
4375 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4376 values_h = typeArrayHandle(THREAD, r);
4377 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4378 break;
4379 }
4380 case JAVA_THREAD_STATE_BLOCKED : {
4381 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4382 values_h = typeArrayHandle(THREAD, r);
4383 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4384 break;
4385 }
4386 case JAVA_THREAD_STATE_WAITING : {
4387 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4388 values_h = typeArrayHandle(THREAD, r);
4389 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4390 values_h->int_at_put(1, java_lang_Thread::PARKED);
4391 break;
4392 }
4393 case JAVA_THREAD_STATE_TIMED_WAITING : {
4394 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4395 values_h = typeArrayHandle(THREAD, r);
4396 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4397 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4398 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4399 break;
4400 }
4401 case JAVA_THREAD_STATE_TERMINATED : {
4402 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4403 values_h = typeArrayHandle(THREAD, r);
4404 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4405 break;
4406 }
4407 default:
4408 // Unknown state - probably incompatible JDK version
4409 return NULL;
4410 }
4412 return (jintArray) JNIHandles::make_local(env, values_h());
4413 }
4414 JVM_END
4417 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4418 jint javaThreadState,
4419 jintArray values))
4420 {
4421 // If new thread states are added in future JDK and VM versions,
4422 // this should check if the JDK version is compatible with thread
4423 // states supported by the VM. Return NULL if not compatible.
4424 //
4425 // This function must map the VM java_lang_Thread::ThreadStatus
4426 // to the Java thread state that the JDK supports.
4427 //
4429 ResourceMark rm;
4431 // Check if threads is null
4432 if (values == NULL) {
4433 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4434 }
4436 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4437 typeArrayHandle values_h(THREAD, v);
4439 objArrayHandle names_h;
4440 switch (javaThreadState) {
4441 case JAVA_THREAD_STATE_NEW : {
4442 assert(values_h->length() == 1 &&
4443 values_h->int_at(0) == java_lang_Thread::NEW,
4444 "Invalid threadStatus value");
4446 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4447 1, /* only 1 substate */
4448 CHECK_NULL);
4449 names_h = objArrayHandle(THREAD, r);
4450 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4451 names_h->obj_at_put(0, name());
4452 break;
4453 }
4454 case JAVA_THREAD_STATE_RUNNABLE : {
4455 assert(values_h->length() == 1 &&
4456 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4457 "Invalid threadStatus value");
4459 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4460 1, /* only 1 substate */
4461 CHECK_NULL);
4462 names_h = objArrayHandle(THREAD, r);
4463 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4464 names_h->obj_at_put(0, name());
4465 break;
4466 }
4467 case JAVA_THREAD_STATE_BLOCKED : {
4468 assert(values_h->length() == 1 &&
4469 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4470 "Invalid threadStatus value");
4472 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4473 1, /* only 1 substate */
4474 CHECK_NULL);
4475 names_h = objArrayHandle(THREAD, r);
4476 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4477 names_h->obj_at_put(0, name());
4478 break;
4479 }
4480 case JAVA_THREAD_STATE_WAITING : {
4481 assert(values_h->length() == 2 &&
4482 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4483 values_h->int_at(1) == java_lang_Thread::PARKED,
4484 "Invalid threadStatus value");
4485 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4486 2, /* number of substates */
4487 CHECK_NULL);
4488 names_h = objArrayHandle(THREAD, r);
4489 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4490 CHECK_NULL);
4491 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4492 CHECK_NULL);
4493 names_h->obj_at_put(0, name0());
4494 names_h->obj_at_put(1, name1());
4495 break;
4496 }
4497 case JAVA_THREAD_STATE_TIMED_WAITING : {
4498 assert(values_h->length() == 3 &&
4499 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4500 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4501 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4502 "Invalid threadStatus value");
4503 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4504 3, /* number of substates */
4505 CHECK_NULL);
4506 names_h = objArrayHandle(THREAD, r);
4507 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4508 CHECK_NULL);
4509 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4510 CHECK_NULL);
4511 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4512 CHECK_NULL);
4513 names_h->obj_at_put(0, name0());
4514 names_h->obj_at_put(1, name1());
4515 names_h->obj_at_put(2, name2());
4516 break;
4517 }
4518 case JAVA_THREAD_STATE_TERMINATED : {
4519 assert(values_h->length() == 1 &&
4520 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4521 "Invalid threadStatus value");
4522 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4523 1, /* only 1 substate */
4524 CHECK_NULL);
4525 names_h = objArrayHandle(THREAD, r);
4526 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4527 names_h->obj_at_put(0, name());
4528 break;
4529 }
4530 default:
4531 // Unknown state - probably incompatible JDK version
4532 return NULL;
4533 }
4534 return (jobjectArray) JNIHandles::make_local(env, names_h());
4535 }
4536 JVM_END
4538 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4539 {
4540 memset(info, 0, sizeof(info_size));
4542 info->jvm_version = Abstract_VM_Version::jvm_version();
4543 info->update_version = 0; /* 0 in HotSpot Express VM */
4544 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4546 // when we add a new capability in the jvm_version_info struct, we should also
4547 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4548 // counter defined in runtimeService.cpp.
4549 info->is_attachable = AttachListener::is_attach_supported();
4550 #ifdef KERNEL
4551 info->is_kernel_jvm = 1; // true;
4552 #else // KERNEL
4553 info->is_kernel_jvm = 0; // false;
4554 #endif // KERNEL
4555 }
4556 JVM_END