Fri, 20 Mar 2009 23:19:36 -0700
6814659: separable cleanups and subroutines for 6655638
Summary: preparatory but separable changes for method handles
Reviewed-by: kvn, never
1 /*
2 * Copyright 1997-2009 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 // Common implementation for JVM_FindClassFromBootLoader and
632 // JVM_FindClassFromLoader
633 static jclass jvm_find_class_from_class_loader(JNIEnv* env, const char* name,
634 jboolean init, jobject loader,
635 jboolean throwError, TRAPS) {
636 // Java libraries should ensure that name is never null...
637 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
638 // It's impossible to create this class; the name cannot fit
639 // into the constant pool.
640 if (throwError) {
641 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
642 } else {
643 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
644 }
645 }
646 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
647 Handle h_loader(THREAD, JNIHandles::resolve(loader));
648 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
649 Handle(), throwError, THREAD);
651 if (TraceClassResolution && result != NULL) {
652 trace_class_resolution(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(result)));
653 }
654 return result;
655 }
657 // Rationale behind JVM_FindClassFromBootLoader
658 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
659 // b> because of (a) java.dll has a direct dependecy on the unexported
660 // private symbol "_JVM_FindClassFromClassLoader@20".
661 // c> the launcher cannot use the private symbol as it dynamically opens
662 // the entry point, so if something changes, the launcher will fail
663 // unexpectedly at runtime, it is safest for the launcher to dlopen a
664 // stable exported interface.
665 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
666 // signature to change from _JVM_FindClassFromClassLoader@20 to
667 // JVM_FindClassFromClassLoader and will not be backward compatible
668 // with older JDKs.
669 // Thus a public/stable exported entry point is the right solution,
670 // public here means public in linker semantics, and is exported only
671 // to the JDK, and is not intended to be a public API.
673 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
674 const char* name,
675 jboolean throwError))
676 JVMWrapper3("JVM_FindClassFromBootLoader %s throw %s", name,
677 throwError ? "error" : "exception");
678 return jvm_find_class_from_class_loader(env, name, JNI_FALSE,
679 (jobject)NULL, throwError, THREAD);
680 JVM_END
682 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
683 jboolean init, jobject loader,
684 jboolean throwError))
685 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
686 throwError ? "error" : "exception");
687 return jvm_find_class_from_class_loader(env, name, init, loader,
688 throwError, THREAD);
689 JVM_END
692 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
693 jboolean init, jclass from))
694 JVMWrapper2("JVM_FindClassFromClass %s", name);
695 if (name == NULL || (int)strlen(name) > symbolOopDesc::max_length()) {
696 // It's impossible to create this class; the name cannot fit
697 // into the constant pool.
698 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
699 }
700 symbolHandle h_name = oopFactory::new_symbol_handle(name, CHECK_NULL);
701 oop from_class_oop = JNIHandles::resolve(from);
702 klassOop from_class = (from_class_oop == NULL)
703 ? (klassOop)NULL
704 : java_lang_Class::as_klassOop(from_class_oop);
705 oop class_loader = NULL;
706 oop protection_domain = NULL;
707 if (from_class != NULL) {
708 class_loader = Klass::cast(from_class)->class_loader();
709 protection_domain = Klass::cast(from_class)->protection_domain();
710 }
711 Handle h_loader(THREAD, class_loader);
712 Handle h_prot (THREAD, protection_domain);
713 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
714 h_prot, true, thread);
716 if (TraceClassResolution && result != NULL) {
717 // this function is generally only used for class loading during verification.
718 ResourceMark rm;
719 oop from_mirror = JNIHandles::resolve_non_null(from);
720 klassOop from_class = java_lang_Class::as_klassOop(from_mirror);
721 const char * from_name = Klass::cast(from_class)->external_name();
723 oop mirror = JNIHandles::resolve_non_null(result);
724 klassOop to_class = java_lang_Class::as_klassOop(mirror);
725 const char * to = Klass::cast(to_class)->external_name();
726 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
727 }
729 return result;
730 JVM_END
732 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
733 if (loader.is_null()) {
734 return;
735 }
737 // check whether the current caller thread holds the lock or not.
738 // If not, increment the corresponding counter
739 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
740 ObjectSynchronizer::owner_self) {
741 counter->inc();
742 }
743 }
745 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
746 static jclass jvm_define_class_common(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source, TRAPS) {
747 if (source == NULL) source = "__JVM_DefineClass__";
749 // Since exceptions can be thrown, class initialization can take place
750 // if name is NULL no check for class name in .class stream has to be made.
751 symbolHandle class_name;
752 if (name != NULL) {
753 const int str_len = (int)strlen(name);
754 if (str_len > symbolOopDesc::max_length()) {
755 // It's impossible to create this class; the name cannot fit
756 // into the constant pool.
757 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
758 }
759 class_name = oopFactory::new_symbol_handle(name, str_len, CHECK_NULL);
760 }
762 ResourceMark rm(THREAD);
763 ClassFileStream st((u1*) buf, len, (char *)source);
764 Handle class_loader (THREAD, JNIHandles::resolve(loader));
765 if (UsePerfData) {
766 is_lock_held_by_thread(class_loader,
767 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
768 THREAD);
769 }
770 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
771 klassOop k = SystemDictionary::resolve_from_stream(class_name, class_loader,
772 protection_domain, &st,
773 CHECK_NULL);
775 if (TraceClassResolution && k != NULL) {
776 trace_class_resolution(k);
777 }
779 return (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
780 }
783 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
784 JVMWrapper2("JVM_DefineClass %s", name);
786 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, THREAD);
787 JVM_END
790 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
791 JVMWrapper2("JVM_DefineClassWithSource %s", name);
793 return jvm_define_class_common(env, name, loader, buf, len, pd, source, THREAD);
794 JVM_END
797 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
798 JVMWrapper("JVM_FindLoadedClass");
799 ResourceMark rm(THREAD);
801 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
802 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
804 const char* str = java_lang_String::as_utf8_string(string());
805 // Sanity check, don't expect null
806 if (str == NULL) return NULL;
808 const int str_len = (int)strlen(str);
809 if (str_len > symbolOopDesc::max_length()) {
810 // It's impossible to create this class; the name cannot fit
811 // into the constant pool.
812 return NULL;
813 }
814 symbolHandle klass_name = oopFactory::new_symbol_handle(str, str_len,CHECK_NULL);
816 // Security Note:
817 // The Java level wrapper will perform the necessary security check allowing
818 // us to pass the NULL as the initiating class loader.
819 Handle h_loader(THREAD, JNIHandles::resolve(loader));
820 if (UsePerfData) {
821 is_lock_held_by_thread(h_loader,
822 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
823 THREAD);
824 }
826 klassOop k = SystemDictionary::find_instance_or_array_klass(klass_name,
827 h_loader,
828 Handle(),
829 CHECK_NULL);
831 return (k == NULL) ? NULL :
832 (jclass) JNIHandles::make_local(env, Klass::cast(k)->java_mirror());
833 JVM_END
836 // Reflection support //////////////////////////////////////////////////////////////////////////////
838 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
839 assert (cls != NULL, "illegal class");
840 JVMWrapper("JVM_GetClassName");
841 JvmtiVMObjectAllocEventCollector oam;
842 ResourceMark rm(THREAD);
843 const char* name;
844 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
845 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
846 } else {
847 // Consider caching interned string in Klass
848 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
849 assert(k->is_klass(), "just checking");
850 name = Klass::cast(k)->external_name();
851 }
852 oop result = StringTable::intern((char*) name, CHECK_NULL);
853 return (jstring) JNIHandles::make_local(env, result);
854 JVM_END
857 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
858 JVMWrapper("JVM_GetClassInterfaces");
859 JvmtiVMObjectAllocEventCollector oam;
860 oop mirror = JNIHandles::resolve_non_null(cls);
862 // Special handling for primitive objects
863 if (java_lang_Class::is_primitive(mirror)) {
864 // Primitive objects does not have any interfaces
865 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
866 return (jobjectArray) JNIHandles::make_local(env, r);
867 }
869 KlassHandle klass(thread, java_lang_Class::as_klassOop(mirror));
870 // Figure size of result array
871 int size;
872 if (klass->oop_is_instance()) {
873 size = instanceKlass::cast(klass())->local_interfaces()->length();
874 } else {
875 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
876 size = 2;
877 }
879 // Allocate result array
880 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), size, CHECK_NULL);
881 objArrayHandle result (THREAD, r);
882 // Fill in result
883 if (klass->oop_is_instance()) {
884 // Regular instance klass, fill in all local interfaces
885 for (int index = 0; index < size; index++) {
886 klassOop k = klassOop(instanceKlass::cast(klass())->local_interfaces()->obj_at(index));
887 result->obj_at_put(index, Klass::cast(k)->java_mirror());
888 }
889 } else {
890 // All arrays implement java.lang.Cloneable and java.io.Serializable
891 result->obj_at_put(0, Klass::cast(SystemDictionary::cloneable_klass())->java_mirror());
892 result->obj_at_put(1, Klass::cast(SystemDictionary::serializable_klass())->java_mirror());
893 }
894 return (jobjectArray) JNIHandles::make_local(env, result());
895 JVM_END
898 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
899 JVMWrapper("JVM_GetClassLoader");
900 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
901 return NULL;
902 }
903 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
904 oop loader = Klass::cast(k)->class_loader();
905 return JNIHandles::make_local(env, loader);
906 JVM_END
909 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
910 JVMWrapper("JVM_IsInterface");
911 oop mirror = JNIHandles::resolve_non_null(cls);
912 if (java_lang_Class::is_primitive(mirror)) {
913 return JNI_FALSE;
914 }
915 klassOop k = java_lang_Class::as_klassOop(mirror);
916 jboolean result = Klass::cast(k)->is_interface();
917 assert(!result || Klass::cast(k)->oop_is_instance(),
918 "all interfaces are instance types");
919 // The compiler intrinsic for isInterface tests the
920 // Klass::_access_flags bits in the same way.
921 return result;
922 JVM_END
925 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
926 JVMWrapper("JVM_GetClassSigners");
927 JvmtiVMObjectAllocEventCollector oam;
928 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
929 // There are no signers for primitive types
930 return NULL;
931 }
933 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
934 objArrayOop signers = NULL;
935 if (Klass::cast(k)->oop_is_instance()) {
936 signers = instanceKlass::cast(k)->signers();
937 }
939 // If there are no signers set in the class, or if the class
940 // is an array, return NULL.
941 if (signers == NULL) return NULL;
943 // copy of the signers array
944 klassOop element = objArrayKlass::cast(signers->klass())->element_klass();
945 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
946 for (int index = 0; index < signers->length(); index++) {
947 signers_copy->obj_at_put(index, signers->obj_at(index));
948 }
950 // return the copy
951 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
952 JVM_END
955 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
956 JVMWrapper("JVM_SetClassSigners");
957 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
958 // This call is ignored for primitive types and arrays.
959 // Signers are only set once, ClassLoader.java, and thus shouldn't
960 // be called with an array. Only the bootstrap loader creates arrays.
961 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
962 if (Klass::cast(k)->oop_is_instance()) {
963 instanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
964 }
965 }
966 JVM_END
969 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
970 JVMWrapper("JVM_GetProtectionDomain");
971 if (JNIHandles::resolve(cls) == NULL) {
972 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
973 }
975 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
976 // Primitive types does not have a protection domain.
977 return NULL;
978 }
980 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
981 return (jobject) JNIHandles::make_local(env, Klass::cast(k)->protection_domain());
982 JVM_END
985 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
986 // still defined in core libraries as of 1.5.
987 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
988 JVMWrapper("JVM_SetProtectionDomain");
989 if (JNIHandles::resolve(cls) == NULL) {
990 THROW(vmSymbols::java_lang_NullPointerException());
991 }
992 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
993 // Call is ignored for primitive types
994 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
996 // cls won't be an array, as this called only from ClassLoader.defineClass
997 if (Klass::cast(k)->oop_is_instance()) {
998 oop pd = JNIHandles::resolve(protection_domain);
999 assert(pd == NULL || pd->is_oop(), "just checking");
1000 instanceKlass::cast(k)->set_protection_domain(pd);
1001 }
1002 }
1003 JVM_END
1006 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1007 JVMWrapper("JVM_DoPrivileged");
1009 if (action == NULL) {
1010 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1011 }
1013 // Stack allocated list of privileged stack elements
1014 PrivilegedElement pi;
1016 // Check that action object understands "Object run()"
1017 Handle object (THREAD, JNIHandles::resolve(action));
1019 // get run() method
1020 methodOop m_oop = Klass::cast(object->klass())->uncached_lookup_method(
1021 vmSymbols::run_method_name(),
1022 vmSymbols::void_object_signature());
1023 methodHandle m (THREAD, m_oop);
1024 if (m.is_null() || !m->is_method() || !methodOop(m())->is_public() || methodOop(m())->is_static()) {
1025 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1026 }
1028 // Compute the frame initiating the do privileged operation and setup the privileged stack
1029 vframeStream vfst(thread);
1030 vfst.security_get_caller_frame(1);
1032 if (!vfst.at_end()) {
1033 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1034 thread->set_privileged_stack_top(&pi);
1035 }
1038 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1039 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1040 Handle pending_exception;
1041 JavaValue result(T_OBJECT);
1042 JavaCallArguments args(object);
1043 JavaCalls::call(&result, m, &args, THREAD);
1045 // done with action, remove ourselves from the list
1046 if (!vfst.at_end()) {
1047 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1048 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1049 }
1051 if (HAS_PENDING_EXCEPTION) {
1052 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1053 CLEAR_PENDING_EXCEPTION;
1055 if ( pending_exception->is_a(SystemDictionary::exception_klass()) &&
1056 !pending_exception->is_a(SystemDictionary::runtime_exception_klass())) {
1057 // Throw a java.security.PrivilegedActionException(Exception e) exception
1058 JavaCallArguments args(pending_exception);
1059 THROW_ARG_0(vmSymbolHandles::java_security_PrivilegedActionException(),
1060 vmSymbolHandles::exception_void_signature(),
1061 &args);
1062 }
1063 }
1065 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1066 return JNIHandles::make_local(env, (oop) result.get_jobject());
1067 JVM_END
1070 // Returns the inherited_access_control_context field of the running thread.
1071 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1072 JVMWrapper("JVM_GetInheritedAccessControlContext");
1073 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1074 return JNIHandles::make_local(env, result);
1075 JVM_END
1077 class RegisterArrayForGC {
1078 private:
1079 JavaThread *_thread;
1080 public:
1081 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1082 _thread = thread;
1083 _thread->register_array_for_gc(array);
1084 }
1086 ~RegisterArrayForGC() {
1087 _thread->register_array_for_gc(NULL);
1088 }
1089 };
1092 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1093 JVMWrapper("JVM_GetStackAccessControlContext");
1094 if (!UsePrivilegedStack) return NULL;
1096 ResourceMark rm(THREAD);
1097 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1098 JvmtiVMObjectAllocEventCollector oam;
1100 // count the protection domains on the execution stack. We collapse
1101 // duplicate consecutive protection domains into a single one, as
1102 // well as stopping when we hit a privileged frame.
1104 // Use vframeStream to iterate through Java frames
1105 vframeStream vfst(thread);
1107 oop previous_protection_domain = NULL;
1108 Handle privileged_context(thread, NULL);
1109 bool is_privileged = false;
1110 oop protection_domain = NULL;
1112 for(; !vfst.at_end(); vfst.next()) {
1113 // get method of frame
1114 methodOop method = vfst.method();
1115 intptr_t* frame_id = vfst.frame_id();
1117 // check the privileged frames to see if we have a match
1118 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1119 // this frame is privileged
1120 is_privileged = true;
1121 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1122 protection_domain = thread->privileged_stack_top()->protection_domain();
1123 } else {
1124 protection_domain = instanceKlass::cast(method->method_holder())->protection_domain();
1125 }
1127 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1128 local_array->push(protection_domain);
1129 previous_protection_domain = protection_domain;
1130 }
1132 if (is_privileged) break;
1133 }
1136 // either all the domains on the stack were system domains, or
1137 // we had a privileged system domain
1138 if (local_array->is_empty()) {
1139 if (is_privileged && privileged_context.is_null()) return NULL;
1141 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1142 return JNIHandles::make_local(env, result);
1143 }
1145 // the resource area must be registered in case of a gc
1146 RegisterArrayForGC ragc(thread, local_array);
1147 objArrayOop context = oopFactory::new_objArray(SystemDictionary::protectionDomain_klass(),
1148 local_array->length(), CHECK_NULL);
1149 objArrayHandle h_context(thread, context);
1150 for (int index = 0; index < local_array->length(); index++) {
1151 h_context->obj_at_put(index, local_array->at(index));
1152 }
1154 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1156 return JNIHandles::make_local(env, result);
1157 JVM_END
1160 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1161 JVMWrapper("JVM_IsArrayClass");
1162 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1163 return (k != NULL) && Klass::cast(k)->oop_is_javaArray() ? true : false;
1164 JVM_END
1167 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1168 JVMWrapper("JVM_IsPrimitiveClass");
1169 oop mirror = JNIHandles::resolve_non_null(cls);
1170 return (jboolean) java_lang_Class::is_primitive(mirror);
1171 JVM_END
1174 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1175 JVMWrapper("JVM_GetComponentType");
1176 oop mirror = JNIHandles::resolve_non_null(cls);
1177 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1178 return (jclass) JNIHandles::make_local(env, result);
1179 JVM_END
1182 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1183 JVMWrapper("JVM_GetClassModifiers");
1184 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1185 // Primitive type
1186 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1187 }
1189 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1190 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1191 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1192 return k->modifier_flags();
1193 JVM_END
1196 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1198 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1199 const int inner_class_info_index = 0;
1200 const int outer_class_info_index = 1;
1202 JvmtiVMObjectAllocEventCollector oam;
1203 // ofClass is a reference to a java_lang_Class object. The mirror object
1204 // of an instanceKlass
1206 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1207 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1208 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1209 return (jobjectArray)JNIHandles::make_local(env, result);
1210 }
1212 instanceKlassHandle k(thread, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1214 if (k->inner_classes()->length() == 0) {
1215 // Neither an inner nor outer class
1216 oop result = oopFactory::new_objArray(SystemDictionary::class_klass(), 0, CHECK_NULL);
1217 return (jobjectArray)JNIHandles::make_local(env, result);
1218 }
1220 // find inner class info
1221 typeArrayHandle icls(thread, k->inner_classes());
1222 constantPoolHandle cp(thread, k->constants());
1223 int length = icls->length();
1225 // Allocate temp. result array
1226 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), length/4, CHECK_NULL);
1227 objArrayHandle result (THREAD, r);
1228 int members = 0;
1230 for(int i = 0; i < length; i += 4) {
1231 int ioff = icls->ushort_at(i + inner_class_info_index);
1232 int ooff = icls->ushort_at(i + outer_class_info_index);
1234 if (ioff != 0 && ooff != 0) {
1235 // Check to see if the name matches the class we're looking for
1236 // before attempting to find the class.
1237 if (cp->klass_name_at_matches(k, ooff)) {
1238 klassOop outer_klass = cp->klass_at(ooff, CHECK_NULL);
1239 if (outer_klass == k()) {
1240 klassOop ik = cp->klass_at(ioff, CHECK_NULL);
1241 instanceKlassHandle inner_klass (THREAD, ik);
1243 // Throws an exception if outer klass has not declared k as
1244 // an inner klass
1245 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1247 result->obj_at_put(members, inner_klass->java_mirror());
1248 members++;
1249 }
1250 }
1251 }
1252 }
1254 if (members != length) {
1255 // Return array of right length
1256 objArrayOop res = oopFactory::new_objArray(SystemDictionary::class_klass(), members, CHECK_NULL);
1257 for(int i = 0; i < members; i++) {
1258 res->obj_at_put(i, result->obj_at(i));
1259 }
1260 return (jobjectArray)JNIHandles::make_local(env, res);
1261 }
1263 return (jobjectArray)JNIHandles::make_local(env, result());
1264 JVM_END
1267 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1268 {
1269 // ofClass is a reference to a java_lang_Class object.
1270 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1271 ! Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_instance()) {
1272 return NULL;
1273 }
1275 symbolOop simple_name = NULL;
1276 klassOop outer_klass
1277 = instanceKlass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass))
1278 )->compute_enclosing_class(simple_name, CHECK_NULL);
1279 if (outer_klass == NULL) return NULL; // already a top-level class
1280 if (simple_name == NULL) return NULL; // an anonymous class (inside a method)
1281 return (jclass) JNIHandles::make_local(env, Klass::cast(outer_klass)->java_mirror());
1282 }
1283 JVM_END
1285 // should be in instanceKlass.cpp, but is here for historical reasons
1286 klassOop instanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1287 symbolOop& simple_name_result, TRAPS) {
1288 Thread* thread = THREAD;
1289 const int inner_class_info_index = inner_class_inner_class_info_offset;
1290 const int outer_class_info_index = inner_class_outer_class_info_offset;
1292 if (k->inner_classes()->length() == 0) {
1293 // No inner class info => no declaring class
1294 return NULL;
1295 }
1297 typeArrayHandle i_icls(thread, k->inner_classes());
1298 constantPoolHandle i_cp(thread, k->constants());
1299 int i_length = i_icls->length();
1301 bool found = false;
1302 klassOop ok;
1303 instanceKlassHandle outer_klass;
1304 bool inner_is_member = false;
1305 int simple_name_index = 0;
1307 // Find inner_klass attribute
1308 for (int i = 0; i < i_length && !found; i += inner_class_next_offset) {
1309 int ioff = i_icls->ushort_at(i + inner_class_info_index);
1310 int ooff = i_icls->ushort_at(i + outer_class_info_index);
1311 int noff = i_icls->ushort_at(i + inner_class_inner_name_offset);
1312 if (ioff != 0) {
1313 // Check to see if the name matches the class we're looking for
1314 // before attempting to find the class.
1315 if (i_cp->klass_name_at_matches(k, ioff)) {
1316 klassOop inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1317 found = (k() == inner_klass);
1318 if (found && ooff != 0) {
1319 ok = i_cp->klass_at(ooff, CHECK_NULL);
1320 outer_klass = instanceKlassHandle(thread, ok);
1321 simple_name_index = noff;
1322 inner_is_member = true;
1323 }
1324 }
1325 }
1326 }
1328 if (found && outer_klass.is_null()) {
1329 // It may be anonymous; try for that.
1330 int encl_method_class_idx = k->enclosing_method_class_index();
1331 if (encl_method_class_idx != 0) {
1332 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1333 outer_klass = instanceKlassHandle(thread, ok);
1334 inner_is_member = false;
1335 }
1336 }
1338 // If no inner class attribute found for this class.
1339 if (outer_klass.is_null()) return NULL;
1341 // Throws an exception if outer klass has not declared k as an inner klass
1342 // We need evidence that each klass knows about the other, or else
1343 // the system could allow a spoof of an inner class to gain access rights.
1344 Reflection::check_for_inner_class(outer_klass, k, inner_is_member, CHECK_NULL);
1346 simple_name_result = (inner_is_member ? i_cp->symbol_at(simple_name_index) : symbolOop(NULL));
1347 return outer_klass();
1348 }
1350 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1351 assert (cls != NULL, "illegal class");
1352 JVMWrapper("JVM_GetClassSignature");
1353 JvmtiVMObjectAllocEventCollector oam;
1354 ResourceMark rm(THREAD);
1355 // Return null for arrays and primatives
1356 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1357 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1358 if (Klass::cast(k)->oop_is_instance()) {
1359 symbolHandle sym = symbolHandle(THREAD, instanceKlass::cast(k)->generic_signature());
1360 if (sym.is_null()) return NULL;
1361 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1362 return (jstring) JNIHandles::make_local(env, str());
1363 }
1364 }
1365 return NULL;
1366 JVM_END
1369 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1370 assert (cls != NULL, "illegal class");
1371 JVMWrapper("JVM_GetClassAnnotations");
1372 ResourceMark rm(THREAD);
1373 // Return null for arrays and primitives
1374 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1375 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve(cls));
1376 if (Klass::cast(k)->oop_is_instance()) {
1377 return (jbyteArray) JNIHandles::make_local(env,
1378 instanceKlass::cast(k)->class_annotations());
1379 }
1380 }
1381 return NULL;
1382 JVM_END
1385 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1386 assert(field != NULL, "illegal field");
1387 JVMWrapper("JVM_GetFieldAnnotations");
1389 // some of this code was adapted from from jni_FromReflectedField
1391 // field is a handle to a java.lang.reflect.Field object
1392 oop reflected = JNIHandles::resolve_non_null(field);
1393 oop mirror = java_lang_reflect_Field::clazz(reflected);
1394 klassOop k = java_lang_Class::as_klassOop(mirror);
1395 int slot = java_lang_reflect_Field::slot(reflected);
1396 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1398 fieldDescriptor fd;
1399 KlassHandle kh(THREAD, k);
1400 intptr_t offset = instanceKlass::cast(kh())->offset_from_fields(slot);
1402 if (modifiers & JVM_ACC_STATIC) {
1403 // for static fields we only look in the current class
1404 if (!instanceKlass::cast(kh())->find_local_field_from_offset(offset,
1405 true, &fd)) {
1406 assert(false, "cannot find static field");
1407 return NULL; // robustness
1408 }
1409 } else {
1410 // for instance fields we start with the current class and work
1411 // our way up through the superclass chain
1412 if (!instanceKlass::cast(kh())->find_field_from_offset(offset, false,
1413 &fd)) {
1414 assert(false, "cannot find instance field");
1415 return NULL; // robustness
1416 }
1417 }
1419 return (jbyteArray) JNIHandles::make_local(env, fd.annotations());
1420 JVM_END
1423 static methodOop jvm_get_method_common(jobject method, TRAPS) {
1424 // some of this code was adapted from from jni_FromReflectedMethod
1426 oop reflected = JNIHandles::resolve_non_null(method);
1427 oop mirror = NULL;
1428 int slot = 0;
1430 if (reflected->klass() == SystemDictionary::reflect_constructor_klass()) {
1431 mirror = java_lang_reflect_Constructor::clazz(reflected);
1432 slot = java_lang_reflect_Constructor::slot(reflected);
1433 } else {
1434 assert(reflected->klass() == SystemDictionary::reflect_method_klass(),
1435 "wrong type");
1436 mirror = java_lang_reflect_Method::clazz(reflected);
1437 slot = java_lang_reflect_Method::slot(reflected);
1438 }
1439 klassOop k = java_lang_Class::as_klassOop(mirror);
1441 KlassHandle kh(THREAD, k);
1442 methodOop m = instanceKlass::cast(kh())->method_with_idnum(slot);
1443 if (m == NULL) {
1444 assert(false, "cannot find method");
1445 return NULL; // robustness
1446 }
1448 return m;
1449 }
1452 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1453 JVMWrapper("JVM_GetMethodAnnotations");
1455 // method is a handle to a java.lang.reflect.Method object
1456 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1457 return (jbyteArray) JNIHandles::make_local(env, m->annotations());
1458 JVM_END
1461 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1462 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1464 // method is a handle to a java.lang.reflect.Method object
1465 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1466 return (jbyteArray) JNIHandles::make_local(env, m->annotation_default());
1467 JVM_END
1470 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1471 JVMWrapper("JVM_GetMethodParameterAnnotations");
1473 // method is a handle to a java.lang.reflect.Method object
1474 methodOop m = jvm_get_method_common(method, CHECK_NULL);
1475 return (jbyteArray) JNIHandles::make_local(env, m->parameter_annotations());
1476 JVM_END
1479 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1481 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1482 {
1483 JVMWrapper("JVM_GetClassDeclaredFields");
1484 JvmtiVMObjectAllocEventCollector oam;
1486 // Exclude primitive types and array types
1487 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1488 Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1489 // Return empty array
1490 oop res = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), 0, CHECK_NULL);
1491 return (jobjectArray) JNIHandles::make_local(env, res);
1492 }
1494 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1495 constantPoolHandle cp(THREAD, k->constants());
1497 // Ensure class is linked
1498 k->link_class(CHECK_NULL);
1500 typeArrayHandle fields(THREAD, k->fields());
1501 int fields_len = fields->length();
1503 // 4496456 We need to filter out java.lang.Throwable.backtrace
1504 bool skip_backtrace = false;
1506 // Allocate result
1507 int num_fields;
1509 if (publicOnly) {
1510 num_fields = 0;
1511 for (int i = 0, j = 0; i < fields_len; i += instanceKlass::next_offset, j++) {
1512 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1513 if (mods & JVM_ACC_PUBLIC) ++num_fields;
1514 }
1515 } else {
1516 num_fields = fields_len / instanceKlass::next_offset;
1518 if (k() == SystemDictionary::throwable_klass()) {
1519 num_fields--;
1520 skip_backtrace = true;
1521 }
1522 }
1524 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_field_klass(), num_fields, CHECK_NULL);
1525 objArrayHandle result (THREAD, r);
1527 int out_idx = 0;
1528 fieldDescriptor fd;
1529 for (int i = 0; i < fields_len; i += instanceKlass::next_offset) {
1530 if (skip_backtrace) {
1531 // 4496456 skip java.lang.Throwable.backtrace
1532 int offset = k->offset_from_fields(i);
1533 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1534 }
1536 int mods = fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
1537 if (!publicOnly || (mods & JVM_ACC_PUBLIC)) {
1538 fd.initialize(k(), i);
1539 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1540 result->obj_at_put(out_idx, field);
1541 ++out_idx;
1542 }
1543 }
1544 assert(out_idx == num_fields, "just checking");
1545 return (jobjectArray) JNIHandles::make_local(env, result());
1546 }
1547 JVM_END
1549 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1550 {
1551 JVMWrapper("JVM_GetClassDeclaredMethods");
1552 JvmtiVMObjectAllocEventCollector oam;
1554 // Exclude primitive types and array types
1555 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1556 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1557 // Return empty array
1558 oop res = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), 0, CHECK_NULL);
1559 return (jobjectArray) JNIHandles::make_local(env, res);
1560 }
1562 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1564 // Ensure class is linked
1565 k->link_class(CHECK_NULL);
1567 objArrayHandle methods (THREAD, k->methods());
1568 int methods_length = methods->length();
1569 int num_methods = 0;
1571 int i;
1572 for (i = 0; i < methods_length; i++) {
1573 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1574 if (!method->is_initializer()) {
1575 if (!publicOnly || method->is_public()) {
1576 ++num_methods;
1577 }
1578 }
1579 }
1581 // Allocate result
1582 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_method_klass(), num_methods, CHECK_NULL);
1583 objArrayHandle result (THREAD, r);
1585 int out_idx = 0;
1586 for (i = 0; i < methods_length; i++) {
1587 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1588 if (!method->is_initializer()) {
1589 if (!publicOnly || method->is_public()) {
1590 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1591 result->obj_at_put(out_idx, m);
1592 ++out_idx;
1593 }
1594 }
1595 }
1596 assert(out_idx == num_methods, "just checking");
1597 return (jobjectArray) JNIHandles::make_local(env, result());
1598 }
1599 JVM_END
1601 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1602 {
1603 JVMWrapper("JVM_GetClassDeclaredConstructors");
1604 JvmtiVMObjectAllocEventCollector oam;
1606 // Exclude primitive types and array types
1607 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1608 || Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)))->oop_is_javaArray()) {
1609 // Return empty array
1610 oop res = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), 0 , CHECK_NULL);
1611 return (jobjectArray) JNIHandles::make_local(env, res);
1612 }
1614 instanceKlassHandle k(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(ofClass)));
1616 // Ensure class is linked
1617 k->link_class(CHECK_NULL);
1619 objArrayHandle methods (THREAD, k->methods());
1620 int methods_length = methods->length();
1621 int num_constructors = 0;
1623 int i;
1624 for (i = 0; i < methods_length; i++) {
1625 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1626 if (method->is_initializer() && !method->is_static()) {
1627 if (!publicOnly || method->is_public()) {
1628 ++num_constructors;
1629 }
1630 }
1631 }
1633 // Allocate result
1634 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_constructor_klass(), num_constructors, CHECK_NULL);
1635 objArrayHandle result(THREAD, r);
1637 int out_idx = 0;
1638 for (i = 0; i < methods_length; i++) {
1639 methodHandle method(THREAD, (methodOop) methods->obj_at(i));
1640 if (method->is_initializer() && !method->is_static()) {
1641 if (!publicOnly || method->is_public()) {
1642 oop m = Reflection::new_constructor(method, CHECK_NULL);
1643 result->obj_at_put(out_idx, m);
1644 ++out_idx;
1645 }
1646 }
1647 }
1648 assert(out_idx == num_constructors, "just checking");
1649 return (jobjectArray) JNIHandles::make_local(env, result());
1650 }
1651 JVM_END
1653 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1654 {
1655 JVMWrapper("JVM_GetClassAccessFlags");
1656 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1657 // Primitive type
1658 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1659 }
1661 Klass* k = Klass::cast(java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
1662 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1663 }
1664 JVM_END
1667 // Constant pool access //////////////////////////////////////////////////////////
1669 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1670 {
1671 JVMWrapper("JVM_GetClassConstantPool");
1672 JvmtiVMObjectAllocEventCollector oam;
1674 // Return null for primitives and arrays
1675 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1676 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1677 if (Klass::cast(k)->oop_is_instance()) {
1678 instanceKlassHandle k_h(THREAD, k);
1679 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1680 sun_reflect_ConstantPool::set_cp_oop(jcp(), k_h->constants());
1681 return JNIHandles::make_local(jcp());
1682 }
1683 }
1684 return NULL;
1685 }
1686 JVM_END
1689 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject unused, jobject jcpool))
1690 {
1691 JVMWrapper("JVM_ConstantPoolGetSize");
1692 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1693 return cp->length();
1694 }
1695 JVM_END
1698 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1699 if (!cp->is_within_bounds(index)) {
1700 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1701 }
1702 }
1705 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1706 {
1707 JVMWrapper("JVM_ConstantPoolGetClassAt");
1708 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1709 bounds_check(cp, index, CHECK_NULL);
1710 constantTag tag = cp->tag_at(index);
1711 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1712 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1713 }
1714 klassOop k = cp->klass_at(index, CHECK_NULL);
1715 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1716 }
1717 JVM_END
1720 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1721 {
1722 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1723 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1724 bounds_check(cp, index, CHECK_NULL);
1725 constantTag tag = cp->tag_at(index);
1726 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1727 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1728 }
1729 klassOop k = constantPoolOopDesc::klass_at_if_loaded(cp, index);
1730 if (k == NULL) return NULL;
1731 return (jclass) JNIHandles::make_local(k->klass_part()->java_mirror());
1732 }
1733 JVM_END
1735 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1736 constantTag tag = cp->tag_at(index);
1737 if (!tag.is_method() && !tag.is_interface_method()) {
1738 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1739 }
1740 int klass_ref = cp->uncached_klass_ref_index_at(index);
1741 klassOop k_o;
1742 if (force_resolution) {
1743 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1744 } else {
1745 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1746 if (k_o == NULL) return NULL;
1747 }
1748 instanceKlassHandle k(THREAD, k_o);
1749 symbolOop name = cp->uncached_name_ref_at(index);
1750 symbolOop sig = cp->uncached_signature_ref_at(index);
1751 methodHandle m (THREAD, k->find_method(name, sig));
1752 if (m.is_null()) {
1753 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1754 }
1755 oop method;
1756 if (!m->is_initializer() || m->is_static()) {
1757 method = Reflection::new_method(m, true, true, CHECK_NULL);
1758 } else {
1759 method = Reflection::new_constructor(m, CHECK_NULL);
1760 }
1761 return JNIHandles::make_local(method);
1762 }
1764 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1765 {
1766 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1767 JvmtiVMObjectAllocEventCollector oam;
1768 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1769 bounds_check(cp, index, CHECK_NULL);
1770 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
1771 return res;
1772 }
1773 JVM_END
1775 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1776 {
1777 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
1778 JvmtiVMObjectAllocEventCollector oam;
1779 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1780 bounds_check(cp, index, CHECK_NULL);
1781 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
1782 return res;
1783 }
1784 JVM_END
1786 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1787 constantTag tag = cp->tag_at(index);
1788 if (!tag.is_field()) {
1789 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1790 }
1791 int klass_ref = cp->uncached_klass_ref_index_at(index);
1792 klassOop k_o;
1793 if (force_resolution) {
1794 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1795 } else {
1796 k_o = constantPoolOopDesc::klass_at_if_loaded(cp, klass_ref);
1797 if (k_o == NULL) return NULL;
1798 }
1799 instanceKlassHandle k(THREAD, k_o);
1800 symbolOop name = cp->uncached_name_ref_at(index);
1801 symbolOop sig = cp->uncached_signature_ref_at(index);
1802 fieldDescriptor fd;
1803 klassOop target_klass = k->find_field(name, sig, &fd);
1804 if (target_klass == NULL) {
1805 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
1806 }
1807 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
1808 return JNIHandles::make_local(field);
1809 }
1811 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1812 {
1813 JVMWrapper("JVM_ConstantPoolGetFieldAt");
1814 JvmtiVMObjectAllocEventCollector oam;
1815 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1816 bounds_check(cp, index, CHECK_NULL);
1817 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
1818 return res;
1819 }
1820 JVM_END
1822 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1823 {
1824 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
1825 JvmtiVMObjectAllocEventCollector oam;
1826 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1827 bounds_check(cp, index, CHECK_NULL);
1828 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
1829 return res;
1830 }
1831 JVM_END
1833 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1834 {
1835 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
1836 JvmtiVMObjectAllocEventCollector oam;
1837 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1838 bounds_check(cp, index, CHECK_NULL);
1839 constantTag tag = cp->tag_at(index);
1840 if (!tag.is_field_or_method()) {
1841 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1842 }
1843 int klass_ref = cp->uncached_klass_ref_index_at(index);
1844 symbolHandle klass_name (THREAD, cp->klass_name_at(klass_ref));
1845 symbolHandle member_name(THREAD, cp->uncached_name_ref_at(index));
1846 symbolHandle member_sig (THREAD, cp->uncached_signature_ref_at(index));
1847 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::string_klass(), 3, CHECK_NULL);
1848 objArrayHandle dest(THREAD, dest_o);
1849 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
1850 dest->obj_at_put(0, str());
1851 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
1852 dest->obj_at_put(1, str());
1853 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
1854 dest->obj_at_put(2, str());
1855 return (jobjectArray) JNIHandles::make_local(dest());
1856 }
1857 JVM_END
1859 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1860 {
1861 JVMWrapper("JVM_ConstantPoolGetIntAt");
1862 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1863 bounds_check(cp, index, CHECK_0);
1864 constantTag tag = cp->tag_at(index);
1865 if (!tag.is_int()) {
1866 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1867 }
1868 return cp->int_at(index);
1869 }
1870 JVM_END
1872 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1873 {
1874 JVMWrapper("JVM_ConstantPoolGetLongAt");
1875 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1876 bounds_check(cp, index, CHECK_(0L));
1877 constantTag tag = cp->tag_at(index);
1878 if (!tag.is_long()) {
1879 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1880 }
1881 return cp->long_at(index);
1882 }
1883 JVM_END
1885 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1886 {
1887 JVMWrapper("JVM_ConstantPoolGetFloatAt");
1888 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1889 bounds_check(cp, index, CHECK_(0.0f));
1890 constantTag tag = cp->tag_at(index);
1891 if (!tag.is_float()) {
1892 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1893 }
1894 return cp->float_at(index);
1895 }
1896 JVM_END
1898 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1899 {
1900 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
1901 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1902 bounds_check(cp, index, CHECK_(0.0));
1903 constantTag tag = cp->tag_at(index);
1904 if (!tag.is_double()) {
1905 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1906 }
1907 return cp->double_at(index);
1908 }
1909 JVM_END
1911 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1912 {
1913 JVMWrapper("JVM_ConstantPoolGetStringAt");
1914 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1915 bounds_check(cp, index, CHECK_NULL);
1916 constantTag tag = cp->tag_at(index);
1917 if (!tag.is_string() && !tag.is_unresolved_string()) {
1918 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1919 }
1920 oop str = cp->string_at(index, CHECK_NULL);
1921 return (jstring) JNIHandles::make_local(str);
1922 }
1923 JVM_END
1925 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject unused, jobject jcpool, jint index))
1926 {
1927 JVMWrapper("JVM_ConstantPoolGetUTF8At");
1928 JvmtiVMObjectAllocEventCollector oam;
1929 constantPoolHandle cp = constantPoolHandle(THREAD, constantPoolOop(JNIHandles::resolve_non_null(jcpool)));
1930 bounds_check(cp, index, CHECK_NULL);
1931 constantTag tag = cp->tag_at(index);
1932 if (!tag.is_symbol()) {
1933 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1934 }
1935 symbolOop sym_o = cp->symbol_at(index);
1936 symbolHandle sym(THREAD, sym_o);
1937 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1938 return (jstring) JNIHandles::make_local(str());
1939 }
1940 JVM_END
1943 // Assertion support. //////////////////////////////////////////////////////////
1945 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
1946 JVMWrapper("JVM_DesiredAssertionStatus");
1947 assert(cls != NULL, "bad class");
1949 oop r = JNIHandles::resolve(cls);
1950 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
1951 if (java_lang_Class::is_primitive(r)) return false;
1953 klassOop k = java_lang_Class::as_klassOop(r);
1954 assert(Klass::cast(k)->oop_is_instance(), "must be an instance klass");
1955 if (! Klass::cast(k)->oop_is_instance()) return false;
1957 ResourceMark rm(THREAD);
1958 const char* name = Klass::cast(k)->name()->as_C_string();
1959 bool system_class = Klass::cast(k)->class_loader() == NULL;
1960 return JavaAssertions::enabled(name, system_class);
1962 JVM_END
1965 // Return a new AssertionStatusDirectives object with the fields filled in with
1966 // command-line assertion arguments (i.e., -ea, -da).
1967 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
1968 JVMWrapper("JVM_AssertionStatusDirectives");
1969 JvmtiVMObjectAllocEventCollector oam;
1970 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
1971 return JNIHandles::make_local(env, asd);
1972 JVM_END
1974 // Verification ////////////////////////////////////////////////////////////////////////////////
1976 // Reflection for the verifier /////////////////////////////////////////////////////////////////
1978 // RedefineClasses support: bug 6214132 caused verification to fail.
1979 // All functions from this section should call the jvmtiThreadSate function:
1980 // klassOop class_to_verify_considering_redefinition(klassOop klass).
1981 // The function returns a klassOop of the _scratch_class if the verifier
1982 // was invoked in the middle of the class redefinition.
1983 // Otherwise it returns its argument value which is the _the_class klassOop.
1984 // Please, refer to the description in the jvmtiThreadSate.hpp.
1986 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
1987 JVMWrapper("JVM_GetClassNameUTF");
1988 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1989 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1990 return Klass::cast(k)->name()->as_utf8();
1991 JVM_END
1994 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
1995 JVMWrapper("JVM_GetClassCPTypes");
1996 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
1997 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
1998 // types will have length zero if this is not an instanceKlass
1999 // (length is determined by call to JVM_GetClassCPEntriesCount)
2000 if (Klass::cast(k)->oop_is_instance()) {
2001 constantPoolOop cp = instanceKlass::cast(k)->constants();
2002 for (int index = cp->length() - 1; index >= 0; index--) {
2003 constantTag tag = cp->tag_at(index);
2004 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class :
2005 (tag.is_unresolved_string()) ? JVM_CONSTANT_String : tag.value();
2006 }
2007 }
2008 JVM_END
2011 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2012 JVMWrapper("JVM_GetClassCPEntriesCount");
2013 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2014 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2015 if (!Klass::cast(k)->oop_is_instance())
2016 return 0;
2017 return instanceKlass::cast(k)->constants()->length();
2018 JVM_END
2021 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2022 JVMWrapper("JVM_GetClassFieldsCount");
2023 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2024 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2025 if (!Klass::cast(k)->oop_is_instance())
2026 return 0;
2027 return instanceKlass::cast(k)->fields()->length() / instanceKlass::next_offset;
2028 JVM_END
2031 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2032 JVMWrapper("JVM_GetClassMethodsCount");
2033 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2034 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2035 if (!Klass::cast(k)->oop_is_instance())
2036 return 0;
2037 return instanceKlass::cast(k)->methods()->length();
2038 JVM_END
2041 // The following methods, used for the verifier, are never called with
2042 // array klasses, so a direct cast to instanceKlass is safe.
2043 // Typically, these methods are called in a loop with bounds determined
2044 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2045 // zero for arrays.
2046 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2047 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2048 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2049 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2050 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2051 int length = methodOop(method)->checked_exceptions_length();
2052 if (length > 0) {
2053 CheckedExceptionElement* table= methodOop(method)->checked_exceptions_start();
2054 for (int i = 0; i < length; i++) {
2055 exceptions[i] = table[i].class_cp_index;
2056 }
2057 }
2058 JVM_END
2061 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2062 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2063 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2064 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2065 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2066 return methodOop(method)->checked_exceptions_length();
2067 JVM_END
2070 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2071 JVMWrapper("JVM_GetMethodIxByteCode");
2072 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2073 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2074 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2075 memcpy(code, methodOop(method)->code_base(), methodOop(method)->code_size());
2076 JVM_END
2079 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2080 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2081 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2082 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2083 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2084 return methodOop(method)->code_size();
2085 JVM_END
2088 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2089 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2090 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2091 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2092 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2093 typeArrayOop extable = methodOop(method)->exception_table();
2094 entry->start_pc = extable->int_at(entry_index * 4);
2095 entry->end_pc = extable->int_at(entry_index * 4 + 1);
2096 entry->handler_pc = extable->int_at(entry_index * 4 + 2);
2097 entry->catchType = extable->int_at(entry_index * 4 + 3);
2098 JVM_END
2101 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2102 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2103 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2104 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2105 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2106 return methodOop(method)->exception_table()->length() / 4;
2107 JVM_END
2110 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2111 JVMWrapper("JVM_GetMethodIxModifiers");
2112 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2113 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2114 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2115 return methodOop(method)->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2116 JVM_END
2119 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2120 JVMWrapper("JVM_GetFieldIxModifiers");
2121 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2122 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2123 typeArrayOop fields = instanceKlass::cast(k)->fields();
2124 return fields->ushort_at(field_index * instanceKlass::next_offset + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2125 JVM_END
2128 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2129 JVMWrapper("JVM_GetMethodIxLocalsCount");
2130 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2131 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2132 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2133 return methodOop(method)->max_locals();
2134 JVM_END
2137 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2138 JVMWrapper("JVM_GetMethodIxArgsSize");
2139 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2140 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2141 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2142 return methodOop(method)->size_of_parameters();
2143 JVM_END
2146 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2147 JVMWrapper("JVM_GetMethodIxMaxStack");
2148 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2149 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2150 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2151 return methodOop(method)->max_stack();
2152 JVM_END
2155 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2156 JVMWrapper("JVM_IsConstructorIx");
2157 ResourceMark rm(THREAD);
2158 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2159 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2160 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2161 return methodOop(method)->name() == vmSymbols::object_initializer_name();
2162 JVM_END
2165 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2166 JVMWrapper("JVM_GetMethodIxIxUTF");
2167 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2168 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2169 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2170 return methodOop(method)->name()->as_utf8();
2171 JVM_END
2174 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2175 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2176 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2177 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2178 oop method = instanceKlass::cast(k)->methods()->obj_at(method_index);
2179 return methodOop(method)->signature()->as_utf8();
2180 JVM_END
2182 /**
2183 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2184 * read entries in the constant pool. Since the old verifier always
2185 * works on a copy of the code, it will not see any rewriting that
2186 * may possibly occur in the middle of verification. So it is important
2187 * that nothing it calls tries to use the cpCache instead of the raw
2188 * constant pool, so we must use cp->uncached_x methods when appropriate.
2189 */
2190 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2191 JVMWrapper("JVM_GetCPFieldNameUTF");
2192 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2193 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2194 constantPoolOop cp = instanceKlass::cast(k)->constants();
2195 switch (cp->tag_at(cp_index).value()) {
2196 case JVM_CONSTANT_Fieldref:
2197 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2198 default:
2199 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2200 }
2201 ShouldNotReachHere();
2202 return NULL;
2203 JVM_END
2206 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2207 JVMWrapper("JVM_GetCPMethodNameUTF");
2208 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2209 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2210 constantPoolOop cp = instanceKlass::cast(k)->constants();
2211 switch (cp->tag_at(cp_index).value()) {
2212 case JVM_CONSTANT_InterfaceMethodref:
2213 case JVM_CONSTANT_Methodref:
2214 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2215 default:
2216 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2217 }
2218 ShouldNotReachHere();
2219 return NULL;
2220 JVM_END
2223 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2224 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2225 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2226 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2227 constantPoolOop cp = instanceKlass::cast(k)->constants();
2228 switch (cp->tag_at(cp_index).value()) {
2229 case JVM_CONSTANT_InterfaceMethodref:
2230 case JVM_CONSTANT_Methodref:
2231 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2232 default:
2233 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2234 }
2235 ShouldNotReachHere();
2236 return NULL;
2237 JVM_END
2240 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2241 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2242 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2243 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2244 constantPoolOop cp = instanceKlass::cast(k)->constants();
2245 switch (cp->tag_at(cp_index).value()) {
2246 case JVM_CONSTANT_Fieldref:
2247 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2248 default:
2249 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2250 }
2251 ShouldNotReachHere();
2252 return NULL;
2253 JVM_END
2256 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2257 JVMWrapper("JVM_GetCPClassNameUTF");
2258 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2259 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2260 constantPoolOop cp = instanceKlass::cast(k)->constants();
2261 symbolOop classname = cp->klass_name_at(cp_index);
2262 return classname->as_utf8();
2263 JVM_END
2266 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2267 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2268 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2269 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2270 constantPoolOop cp = instanceKlass::cast(k)->constants();
2271 switch (cp->tag_at(cp_index).value()) {
2272 case JVM_CONSTANT_Fieldref: {
2273 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2274 symbolOop classname = cp->klass_name_at(class_index);
2275 return classname->as_utf8();
2276 }
2277 default:
2278 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2279 }
2280 ShouldNotReachHere();
2281 return NULL;
2282 JVM_END
2285 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2286 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2287 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2288 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2289 constantPoolOop cp = instanceKlass::cast(k)->constants();
2290 switch (cp->tag_at(cp_index).value()) {
2291 case JVM_CONSTANT_Methodref:
2292 case JVM_CONSTANT_InterfaceMethodref: {
2293 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2294 symbolOop classname = cp->klass_name_at(class_index);
2295 return classname->as_utf8();
2296 }
2297 default:
2298 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2299 }
2300 ShouldNotReachHere();
2301 return NULL;
2302 JVM_END
2305 JVM_QUICK_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2306 JVMWrapper("JVM_GetCPFieldModifiers");
2307 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2308 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2309 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2310 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2311 constantPoolOop cp = instanceKlass::cast(k)->constants();
2312 constantPoolOop cp_called = instanceKlass::cast(k_called)->constants();
2313 switch (cp->tag_at(cp_index).value()) {
2314 case JVM_CONSTANT_Fieldref: {
2315 symbolOop name = cp->uncached_name_ref_at(cp_index);
2316 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2317 typeArrayOop fields = instanceKlass::cast(k_called)->fields();
2318 int fields_count = fields->length();
2319 for (int i = 0; i < fields_count; i += instanceKlass::next_offset) {
2320 if (cp_called->symbol_at(fields->ushort_at(i + instanceKlass::name_index_offset)) == name &&
2321 cp_called->symbol_at(fields->ushort_at(i + instanceKlass::signature_index_offset)) == signature) {
2322 return fields->ushort_at(i + instanceKlass::access_flags_offset) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2323 }
2324 }
2325 return -1;
2326 }
2327 default:
2328 fatal("JVM_GetCPFieldModifiers: illegal constant");
2329 }
2330 ShouldNotReachHere();
2331 return 0;
2332 JVM_END
2335 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2336 JVMWrapper("JVM_GetCPMethodModifiers");
2337 klassOop k = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls));
2338 klassOop k_called = java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(called_cls));
2339 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2340 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2341 constantPoolOop cp = instanceKlass::cast(k)->constants();
2342 switch (cp->tag_at(cp_index).value()) {
2343 case JVM_CONSTANT_Methodref:
2344 case JVM_CONSTANT_InterfaceMethodref: {
2345 symbolOop name = cp->uncached_name_ref_at(cp_index);
2346 symbolOop signature = cp->uncached_signature_ref_at(cp_index);
2347 objArrayOop methods = instanceKlass::cast(k_called)->methods();
2348 int methods_count = methods->length();
2349 for (int i = 0; i < methods_count; i++) {
2350 methodOop method = methodOop(methods->obj_at(i));
2351 if (method->name() == name && method->signature() == signature) {
2352 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2353 }
2354 }
2355 return -1;
2356 }
2357 default:
2358 fatal("JVM_GetCPMethodModifiers: illegal constant");
2359 }
2360 ShouldNotReachHere();
2361 return 0;
2362 JVM_END
2365 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2367 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2368 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2369 JVM_END
2372 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2373 JVMWrapper("JVM_IsSameClassPackage");
2374 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2375 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2376 klassOop klass1 = java_lang_Class::as_klassOop(class1_mirror);
2377 klassOop klass2 = java_lang_Class::as_klassOop(class2_mirror);
2378 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2379 JVM_END
2382 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2384 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2385 JVMWrapper2("JVM_Open (%s)", fname);
2387 //%note jvm_r6
2388 int result = hpi::open(fname, flags, mode);
2389 if (result >= 0) {
2390 return result;
2391 } else {
2392 switch(errno) {
2393 case EEXIST:
2394 return JVM_EEXIST;
2395 default:
2396 return -1;
2397 }
2398 }
2399 JVM_END
2402 JVM_LEAF(jint, JVM_Close(jint fd))
2403 JVMWrapper2("JVM_Close (0x%x)", fd);
2404 //%note jvm_r6
2405 return hpi::close(fd);
2406 JVM_END
2409 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2410 JVMWrapper2("JVM_Read (0x%x)", fd);
2412 //%note jvm_r6
2413 return (jint)hpi::read(fd, buf, nbytes);
2414 JVM_END
2417 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2418 JVMWrapper2("JVM_Write (0x%x)", fd);
2420 //%note jvm_r6
2421 return (jint)hpi::write(fd, buf, nbytes);
2422 JVM_END
2425 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2426 JVMWrapper2("JVM_Available (0x%x)", fd);
2427 //%note jvm_r6
2428 return hpi::available(fd, pbytes);
2429 JVM_END
2432 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2433 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2434 //%note jvm_r6
2435 return hpi::lseek(fd, offset, whence);
2436 JVM_END
2439 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2440 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2441 return hpi::ftruncate(fd, length);
2442 JVM_END
2445 JVM_LEAF(jint, JVM_Sync(jint fd))
2446 JVMWrapper2("JVM_Sync (0x%x)", fd);
2447 //%note jvm_r6
2448 return hpi::fsync(fd);
2449 JVM_END
2452 // Printing support //////////////////////////////////////////////////
2453 extern "C" {
2455 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2456 // see bug 4399518, 4417214
2457 if ((intptr_t)count <= 0) return -1;
2458 return vsnprintf(str, count, fmt, args);
2459 }
2462 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2463 va_list args;
2464 int len;
2465 va_start(args, fmt);
2466 len = jio_vsnprintf(str, count, fmt, args);
2467 va_end(args);
2468 return len;
2469 }
2472 int jio_fprintf(FILE* f, const char *fmt, ...) {
2473 int len;
2474 va_list args;
2475 va_start(args, fmt);
2476 len = jio_vfprintf(f, fmt, args);
2477 va_end(args);
2478 return len;
2479 }
2482 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2483 if (Arguments::vfprintf_hook() != NULL) {
2484 return Arguments::vfprintf_hook()(f, fmt, args);
2485 } else {
2486 return vfprintf(f, fmt, args);
2487 }
2488 }
2491 int jio_printf(const char *fmt, ...) {
2492 int len;
2493 va_list args;
2494 va_start(args, fmt);
2495 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2496 va_end(args);
2497 return len;
2498 }
2501 // HotSpot specific jio method
2502 void jio_print(const char* s) {
2503 // Try to make this function as atomic as possible.
2504 if (Arguments::vfprintf_hook() != NULL) {
2505 jio_fprintf(defaultStream::output_stream(), "%s", s);
2506 } else {
2507 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2508 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2509 }
2510 }
2512 } // Extern C
2514 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2516 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2517 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2518 // OSThread objects. The exception to this rule is when the target object is the thread
2519 // doing the operation, in which case we know that the thread won't exit until the
2520 // operation is done (all exits being voluntary). There are a few cases where it is
2521 // rather silly to do operations on yourself, like resuming yourself or asking whether
2522 // you are alive. While these can still happen, they are not subject to deadlocks if
2523 // the lock is held while the operation occurs (this is not the case for suspend, for
2524 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2525 // implementation is local to this file, we always lock Threads_lock for that one.
2527 static void thread_entry(JavaThread* thread, TRAPS) {
2528 HandleMark hm(THREAD);
2529 Handle obj(THREAD, thread->threadObj());
2530 JavaValue result(T_VOID);
2531 JavaCalls::call_virtual(&result,
2532 obj,
2533 KlassHandle(THREAD, SystemDictionary::thread_klass()),
2534 vmSymbolHandles::run_method_name(),
2535 vmSymbolHandles::void_method_signature(),
2536 THREAD);
2537 }
2540 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2541 JVMWrapper("JVM_StartThread");
2542 JavaThread *native_thread = NULL;
2544 // We cannot hold the Threads_lock when we throw an exception,
2545 // due to rank ordering issues. Example: we might need to grab the
2546 // Heap_lock while we construct the exception.
2547 bool throw_illegal_thread_state = false;
2549 // We must release the Threads_lock before we can post a jvmti event
2550 // in Thread::start.
2551 {
2552 // Ensure that the C++ Thread and OSThread structures aren't freed before
2553 // we operate.
2554 MutexLocker mu(Threads_lock);
2556 // Check to see if we're running a thread that's already exited or was
2557 // stopped (is_stillborn) or is still active (thread is not NULL).
2558 if (java_lang_Thread::is_stillborn(JNIHandles::resolve_non_null(jthread)) ||
2559 java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2560 throw_illegal_thread_state = true;
2561 } else {
2562 jlong size =
2563 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2564 // Allocate the C++ Thread structure and create the native thread. The
2565 // stack size retrieved from java is signed, but the constructor takes
2566 // size_t (an unsigned type), so avoid passing negative values which would
2567 // result in really large stacks.
2568 size_t sz = size > 0 ? (size_t) size : 0;
2569 native_thread = new JavaThread(&thread_entry, sz);
2571 // At this point it may be possible that no osthread was created for the
2572 // JavaThread due to lack of memory. Check for this situation and throw
2573 // an exception if necessary. Eventually we may want to change this so
2574 // that we only grab the lock if the thread was created successfully -
2575 // then we can also do this check and throw the exception in the
2576 // JavaThread constructor.
2577 if (native_thread->osthread() != NULL) {
2578 // Note: the current thread is not being used within "prepare".
2579 native_thread->prepare(jthread);
2580 }
2581 }
2582 }
2584 if (throw_illegal_thread_state) {
2585 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2586 }
2588 assert(native_thread != NULL, "Starting null thread?");
2590 if (native_thread->osthread() == NULL) {
2591 // No one should hold a reference to the 'native_thread'.
2592 delete native_thread;
2593 if (JvmtiExport::should_post_resource_exhausted()) {
2594 JvmtiExport::post_resource_exhausted(
2595 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2596 "unable to create new native thread");
2597 }
2598 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2599 "unable to create new native thread");
2600 }
2602 Thread::start(native_thread);
2604 JVM_END
2606 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2607 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2608 // but is thought to be reliable and simple. In the case, where the receiver is the
2609 // save thread as the sender, no safepoint is needed.
2610 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2611 JVMWrapper("JVM_StopThread");
2613 oop java_throwable = JNIHandles::resolve(throwable);
2614 if (java_throwable == NULL) {
2615 THROW(vmSymbols::java_lang_NullPointerException());
2616 }
2617 oop java_thread = JNIHandles::resolve_non_null(jthread);
2618 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2619 Events::log("JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]", receiver, (address)java_thread, throwable);
2620 // First check if thread already exited
2621 if (receiver != NULL) {
2622 // Check if exception is getting thrown at self (use oop equality, since the
2623 // target object might exit)
2624 if (java_thread == thread->threadObj()) {
2625 // This is a change from JDK 1.1, but JDK 1.2 will also do it:
2626 // NOTE (from JDK 1.2): this is done solely to prevent stopped
2627 // threads from being restarted.
2628 // Fix for 4314342, 4145910, perhaps others: it now doesn't have
2629 // any effect on the "liveness" of a thread; see
2630 // JVM_IsThreadAlive, below.
2631 if (java_throwable->is_a(SystemDictionary::threaddeath_klass())) {
2632 java_lang_Thread::set_stillborn(java_thread);
2633 }
2634 THROW_OOP(java_throwable);
2635 } else {
2636 // Enques a VM_Operation to stop all threads and then deliver the exception...
2637 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2638 }
2639 }
2640 JVM_END
2643 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2644 JVMWrapper("JVM_IsThreadAlive");
2646 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2647 return java_lang_Thread::is_alive(thread_oop);
2648 JVM_END
2651 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2652 JVMWrapper("JVM_SuspendThread");
2653 oop java_thread = JNIHandles::resolve_non_null(jthread);
2654 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2656 if (receiver != NULL) {
2657 // thread has run and has not exited (still on threads list)
2659 {
2660 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2661 if (receiver->is_external_suspend()) {
2662 // Don't allow nested external suspend requests. We can't return
2663 // an error from this interface so just ignore the problem.
2664 return;
2665 }
2666 if (receiver->is_exiting()) { // thread is in the process of exiting
2667 return;
2668 }
2669 receiver->set_external_suspend();
2670 }
2672 // java_suspend() will catch threads in the process of exiting
2673 // and will ignore them.
2674 receiver->java_suspend();
2676 // It would be nice to have the following assertion in all the
2677 // time, but it is possible for a racing resume request to have
2678 // resumed this thread right after we suspended it. Temporarily
2679 // enable this assertion if you are chasing a different kind of
2680 // bug.
2681 //
2682 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2683 // receiver->is_being_ext_suspended(), "thread is not suspended");
2684 }
2685 JVM_END
2688 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2689 JVMWrapper("JVM_ResumeThread");
2690 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2691 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2692 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2693 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2694 // looks at it.
2695 MutexLocker ml(Threads_lock);
2696 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2697 if (thr != NULL) {
2698 // the thread has run and is not in the process of exiting
2699 thr->java_resume();
2700 }
2701 JVM_END
2704 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2705 JVMWrapper("JVM_SetThreadPriority");
2706 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2707 MutexLocker ml(Threads_lock);
2708 oop java_thread = JNIHandles::resolve_non_null(jthread);
2709 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2710 JavaThread* thr = java_lang_Thread::thread(java_thread);
2711 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2712 Thread::set_priority(thr, (ThreadPriority)prio);
2713 }
2714 JVM_END
2717 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2718 JVMWrapper("JVM_Yield");
2719 if (os::dont_yield()) return;
2720 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2721 // Critical for similar threading behaviour
2722 if (ConvertYieldToSleep) {
2723 os::sleep(thread, MinSleepInterval, false);
2724 } else {
2725 os::yield();
2726 }
2727 JVM_END
2730 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2731 JVMWrapper("JVM_Sleep");
2733 if (millis < 0) {
2734 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2735 }
2737 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2738 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2739 }
2741 // Save current thread state and restore it at the end of this block.
2742 // And set new thread state to SLEEPING.
2743 JavaThreadSleepState jtss(thread);
2745 if (millis == 0) {
2746 // When ConvertSleepToYield is on, this matches the classic VM implementation of
2747 // JVM_Sleep. Critical for similar threading behaviour (Win32)
2748 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
2749 // for SOLARIS
2750 if (ConvertSleepToYield) {
2751 os::yield();
2752 } else {
2753 ThreadState old_state = thread->osthread()->get_state();
2754 thread->osthread()->set_state(SLEEPING);
2755 os::sleep(thread, MinSleepInterval, false);
2756 thread->osthread()->set_state(old_state);
2757 }
2758 } else {
2759 ThreadState old_state = thread->osthread()->get_state();
2760 thread->osthread()->set_state(SLEEPING);
2761 if (os::sleep(thread, millis, true) == OS_INTRPT) {
2762 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
2763 // us while we were sleeping. We do not overwrite those.
2764 if (!HAS_PENDING_EXCEPTION) {
2765 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
2766 // to properly restore the thread state. That's likely wrong.
2767 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2768 }
2769 }
2770 thread->osthread()->set_state(old_state);
2771 }
2772 JVM_END
2774 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
2775 JVMWrapper("JVM_CurrentThread");
2776 oop jthread = thread->threadObj();
2777 assert (thread != NULL, "no current thread!");
2778 return JNIHandles::make_local(env, jthread);
2779 JVM_END
2782 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
2783 JVMWrapper("JVM_CountStackFrames");
2785 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2786 oop java_thread = JNIHandles::resolve_non_null(jthread);
2787 bool throw_illegal_thread_state = false;
2788 int count = 0;
2790 {
2791 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2792 // We need to re-resolve the java_thread, since a GC might have happened during the
2793 // acquire of the lock
2794 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2796 if (thr == NULL) {
2797 // do nothing
2798 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
2799 // Check whether this java thread has been suspended already. If not, throws
2800 // IllegalThreadStateException. We defer to throw that exception until
2801 // Threads_lock is released since loading exception class has to leave VM.
2802 // The correct way to test a thread is actually suspended is
2803 // wait_for_ext_suspend_completion(), but we can't call that while holding
2804 // the Threads_lock. The above tests are sufficient for our purposes
2805 // provided the walkability of the stack is stable - which it isn't
2806 // 100% but close enough for most practical purposes.
2807 throw_illegal_thread_state = true;
2808 } else {
2809 // Count all java activation, i.e., number of vframes
2810 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
2811 // Native frames are not counted
2812 if (!vfst.method()->is_native()) count++;
2813 }
2814 }
2815 }
2817 if (throw_illegal_thread_state) {
2818 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
2819 "this thread is not suspended");
2820 }
2821 return count;
2822 JVM_END
2824 // Consider: A better way to implement JVM_Interrupt() is to acquire
2825 // Threads_lock to resolve the jthread into a Thread pointer, fetch
2826 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
2827 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
2828 // outside the critical section. Threads_lock is hot so we want to minimize
2829 // the hold-time. A cleaner interface would be to decompose interrupt into
2830 // two steps. The 1st phase, performed under Threads_lock, would return
2831 // a closure that'd be invoked after Threads_lock was dropped.
2832 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
2833 // admit spurious wakeups.
2835 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
2836 JVMWrapper("JVM_Interrupt");
2838 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2839 oop java_thread = JNIHandles::resolve_non_null(jthread);
2840 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2841 // We need to re-resolve the java_thread, since a GC might have happened during the
2842 // acquire of the lock
2843 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2844 if (thr != NULL) {
2845 Thread::interrupt(thr);
2846 }
2847 JVM_END
2850 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
2851 JVMWrapper("JVM_IsInterrupted");
2853 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2854 oop java_thread = JNIHandles::resolve_non_null(jthread);
2855 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
2856 // We need to re-resolve the java_thread, since a GC might have happened during the
2857 // acquire of the lock
2858 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2859 if (thr == NULL) {
2860 return JNI_FALSE;
2861 } else {
2862 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
2863 }
2864 JVM_END
2867 // Return true iff the current thread has locked the object passed in
2869 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
2870 JVMWrapper("JVM_HoldsLock");
2871 assert(THREAD->is_Java_thread(), "sanity check");
2872 if (obj == NULL) {
2873 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
2874 }
2875 Handle h_obj(THREAD, JNIHandles::resolve(obj));
2876 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
2877 JVM_END
2880 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
2881 JVMWrapper("JVM_DumpAllStacks");
2882 VM_PrintThreads op;
2883 VMThread::execute(&op);
2884 if (JvmtiExport::should_post_data_dump()) {
2885 JvmtiExport::post_data_dump();
2886 }
2887 JVM_END
2890 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
2892 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
2893 assert(jthread->is_Java_thread(), "must be a Java thread");
2894 if (jthread->privileged_stack_top() == NULL) return false;
2895 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
2896 oop loader = jthread->privileged_stack_top()->class_loader();
2897 if (loader == NULL) return true;
2898 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
2899 if (trusted) return true;
2900 }
2901 return false;
2902 }
2904 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
2905 JVMWrapper("JVM_CurrentLoadedClass");
2906 ResourceMark rm(THREAD);
2908 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2909 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2910 bool trusted = is_trusted_frame(thread, &vfst);
2911 if (trusted) return NULL;
2913 methodOop m = vfst.method();
2914 if (!m->is_native()) {
2915 klassOop holder = m->method_holder();
2916 oop loader = instanceKlass::cast(holder)->class_loader();
2917 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2918 return (jclass) JNIHandles::make_local(env, Klass::cast(holder)->java_mirror());
2919 }
2920 }
2921 }
2922 return NULL;
2923 JVM_END
2926 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
2927 JVMWrapper("JVM_CurrentClassLoader");
2928 ResourceMark rm(THREAD);
2930 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
2932 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
2933 bool trusted = is_trusted_frame(thread, &vfst);
2934 if (trusted) return NULL;
2936 methodOop m = vfst.method();
2937 if (!m->is_native()) {
2938 klassOop holder = m->method_holder();
2939 assert(holder->is_klass(), "just checking");
2940 oop loader = instanceKlass::cast(holder)->class_loader();
2941 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
2942 return JNIHandles::make_local(env, loader);
2943 }
2944 }
2945 }
2946 return NULL;
2947 JVM_END
2950 // Utility object for collecting method holders walking down the stack
2951 class KlassLink: public ResourceObj {
2952 public:
2953 KlassHandle klass;
2954 KlassLink* next;
2956 KlassLink(KlassHandle k) { klass = k; next = NULL; }
2957 };
2960 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
2961 JVMWrapper("JVM_GetClassContext");
2962 ResourceMark rm(THREAD);
2963 JvmtiVMObjectAllocEventCollector oam;
2964 // Collect linked list of (handles to) method holders
2965 KlassLink* first = NULL;
2966 KlassLink* last = NULL;
2967 int depth = 0;
2969 for(vframeStream vfst(thread); !vfst.at_end(); vfst.security_get_caller_frame(1)) {
2970 // Native frames are not returned
2971 if (!vfst.method()->is_native()) {
2972 klassOop holder = vfst.method()->method_holder();
2973 assert(holder->is_klass(), "just checking");
2974 depth++;
2975 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
2976 if (first == NULL) {
2977 first = last = l;
2978 } else {
2979 last->next = l;
2980 last = l;
2981 }
2982 }
2983 }
2985 // Create result array of type [Ljava/lang/Class;
2986 objArrayOop result = oopFactory::new_objArray(SystemDictionary::class_klass(), depth, CHECK_NULL);
2987 // Fill in mirrors corresponding to method holders
2988 int index = 0;
2989 while (first != NULL) {
2990 result->obj_at_put(index++, Klass::cast(first->klass())->java_mirror());
2991 first = first->next;
2992 }
2993 assert(index == depth, "just checking");
2995 return (jobjectArray) JNIHandles::make_local(env, result);
2996 JVM_END
2999 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3000 JVMWrapper("JVM_ClassDepth");
3001 ResourceMark rm(THREAD);
3002 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3003 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3005 const char* str = java_lang_String::as_utf8_string(class_name_str());
3006 symbolHandle class_name_sym =
3007 symbolHandle(THREAD, SymbolTable::probe(str, (int)strlen(str)));
3008 if (class_name_sym.is_null()) {
3009 return -1;
3010 }
3012 int depth = 0;
3014 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3015 if (!vfst.method()->is_native()) {
3016 klassOop holder = vfst.method()->method_holder();
3017 assert(holder->is_klass(), "just checking");
3018 if (instanceKlass::cast(holder)->name() == class_name_sym()) {
3019 return depth;
3020 }
3021 depth++;
3022 }
3023 }
3024 return -1;
3025 JVM_END
3028 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3029 JVMWrapper("JVM_ClassLoaderDepth");
3030 ResourceMark rm(THREAD);
3031 int depth = 0;
3032 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3033 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3034 bool trusted = is_trusted_frame(thread, &vfst);
3035 if (trusted) return -1;
3037 methodOop m = vfst.method();
3038 if (!m->is_native()) {
3039 klassOop holder = m->method_holder();
3040 assert(holder->is_klass(), "just checking");
3041 oop loader = instanceKlass::cast(holder)->class_loader();
3042 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3043 return depth;
3044 }
3045 depth++;
3046 }
3047 }
3048 return -1;
3049 JVM_END
3052 // java.lang.Package ////////////////////////////////////////////////////////////////
3055 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3056 JVMWrapper("JVM_GetSystemPackage");
3057 ResourceMark rm(THREAD);
3058 JvmtiVMObjectAllocEventCollector oam;
3059 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3060 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3061 return (jstring) JNIHandles::make_local(result);
3062 JVM_END
3065 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3066 JVMWrapper("JVM_GetSystemPackages");
3067 JvmtiVMObjectAllocEventCollector oam;
3068 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3069 return (jobjectArray) JNIHandles::make_local(result);
3070 JVM_END
3073 // ObjectInputStream ///////////////////////////////////////////////////////////////
3075 bool force_verify_field_access(klassOop current_class, klassOop field_class, AccessFlags access, bool classloader_only) {
3076 if (current_class == NULL) {
3077 return true;
3078 }
3079 if ((current_class == field_class) || access.is_public()) {
3080 return true;
3081 }
3083 if (access.is_protected()) {
3084 // See if current_class is a subclass of field_class
3085 if (Klass::cast(current_class)->is_subclass_of(field_class)) {
3086 return true;
3087 }
3088 }
3090 return (!access.is_private() && instanceKlass::cast(current_class)->is_same_class_package(field_class));
3091 }
3094 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3095 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3096 JVMWrapper("JVM_AllocateNewObject");
3097 JvmtiVMObjectAllocEventCollector oam;
3098 // Receiver is not used
3099 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3100 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3102 // Cannot instantiate primitive types
3103 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3104 ResourceMark rm(THREAD);
3105 THROW_0(vmSymbols::java_lang_InvalidClassException());
3106 }
3108 // Arrays not allowed here, must use JVM_AllocateNewArray
3109 if (Klass::cast(java_lang_Class::as_klassOop(curr_mirror))->oop_is_javaArray() ||
3110 Klass::cast(java_lang_Class::as_klassOop(init_mirror))->oop_is_javaArray()) {
3111 ResourceMark rm(THREAD);
3112 THROW_0(vmSymbols::java_lang_InvalidClassException());
3113 }
3115 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_klassOop(curr_mirror));
3116 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_klassOop(init_mirror));
3118 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3120 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3121 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3123 // Make sure klass is initialized, since we are about to instantiate one of them.
3124 curr_klass->initialize(CHECK_NULL);
3126 methodHandle m (THREAD,
3127 init_klass->find_method(vmSymbols::object_initializer_name(),
3128 vmSymbols::void_method_signature()));
3129 if (m.is_null()) {
3130 ResourceMark rm(THREAD);
3131 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3132 methodOopDesc::name_and_sig_as_C_string(Klass::cast(init_klass()),
3133 vmSymbols::object_initializer_name(),
3134 vmSymbols::void_method_signature()));
3135 }
3137 if (curr_klass == init_klass && !m->is_public()) {
3138 // Calling the constructor for class 'curr_klass'.
3139 // Only allow calls to a public no-arg constructor.
3140 // This path corresponds to creating an Externalizable object.
3141 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3142 }
3144 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3145 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3146 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3147 }
3149 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3150 // Call constructor m. This might call a constructor higher up in the hierachy
3151 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3153 return JNIHandles::make_local(obj());
3154 JVM_END
3157 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3158 JVMWrapper("JVM_AllocateNewArray");
3159 JvmtiVMObjectAllocEventCollector oam;
3160 oop mirror = JNIHandles::resolve_non_null(currClass);
3162 if (java_lang_Class::is_primitive(mirror)) {
3163 THROW_0(vmSymbols::java_lang_InvalidClassException());
3164 }
3165 klassOop k = java_lang_Class::as_klassOop(mirror);
3166 oop result;
3168 if (k->klass_part()->oop_is_typeArray()) {
3169 // typeArray
3170 result = typeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3171 } else if (k->klass_part()->oop_is_objArray()) {
3172 // objArray
3173 objArrayKlassHandle oak(THREAD, k);
3174 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3175 result = oak->allocate(length, CHECK_NULL);
3176 } else {
3177 THROW_0(vmSymbols::java_lang_InvalidClassException());
3178 }
3179 return JNIHandles::make_local(env, result);
3180 JVM_END
3183 // Return the first non-null class loader up the execution stack, or null
3184 // if only code from the null class loader is on the stack.
3186 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3187 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3188 // UseNewReflection
3189 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3190 klassOop holder = vfst.method()->method_holder();
3191 oop loader = instanceKlass::cast(holder)->class_loader();
3192 if (loader != NULL) {
3193 return JNIHandles::make_local(env, loader);
3194 }
3195 }
3196 return NULL;
3197 JVM_END
3200 // Load a class relative to the most recent class on the stack with a non-null
3201 // classloader.
3202 // This function has been deprecated and should not be considered part of the
3203 // specified JVM interface.
3205 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3206 jclass currClass, jstring currClassName))
3207 JVMWrapper("JVM_LoadClass0");
3208 // Receiver is not used
3209 ResourceMark rm(THREAD);
3211 // Class name argument is not guaranteed to be in internal format
3212 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3213 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3215 const char* str = java_lang_String::as_utf8_string(string());
3217 if (str == NULL || (int)strlen(str) > symbolOopDesc::max_length()) {
3218 // It's impossible to create this class; the name cannot fit
3219 // into the constant pool.
3220 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3221 }
3223 symbolHandle name = oopFactory::new_symbol_handle(str, CHECK_NULL);
3224 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3225 // Find the most recent class on the stack with a non-null classloader
3226 oop loader = NULL;
3227 oop protection_domain = NULL;
3228 if (curr_klass.is_null()) {
3229 for (vframeStream vfst(thread);
3230 !vfst.at_end() && loader == NULL;
3231 vfst.next()) {
3232 if (!vfst.method()->is_native()) {
3233 klassOop holder = vfst.method()->method_holder();
3234 loader = instanceKlass::cast(holder)->class_loader();
3235 protection_domain = instanceKlass::cast(holder)->protection_domain();
3236 }
3237 }
3238 } else {
3239 klassOop curr_klass_oop = java_lang_Class::as_klassOop(curr_klass());
3240 loader = instanceKlass::cast(curr_klass_oop)->class_loader();
3241 protection_domain = instanceKlass::cast(curr_klass_oop)->protection_domain();
3242 }
3243 Handle h_loader(THREAD, loader);
3244 Handle h_prot (THREAD, protection_domain);
3245 return find_class_from_class_loader(env, name, true, h_loader, h_prot,
3246 false, thread);
3247 JVM_END
3250 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3253 // resolve array handle and check arguments
3254 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3255 if (arr == NULL) {
3256 THROW_0(vmSymbols::java_lang_NullPointerException());
3257 }
3258 oop a = JNIHandles::resolve_non_null(arr);
3259 if (!a->is_javaArray() || (type_array_only && !a->is_typeArray())) {
3260 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3261 }
3262 return arrayOop(a);
3263 }
3266 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3267 JVMWrapper("JVM_GetArrayLength");
3268 arrayOop a = check_array(env, arr, false, CHECK_0);
3269 return a->length();
3270 JVM_END
3273 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3274 JVMWrapper("JVM_Array_Get");
3275 JvmtiVMObjectAllocEventCollector oam;
3276 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3277 jvalue value;
3278 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3279 oop box = Reflection::box(&value, type, CHECK_NULL);
3280 return JNIHandles::make_local(env, box);
3281 JVM_END
3284 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3285 JVMWrapper("JVM_GetPrimitiveArrayElement");
3286 jvalue value;
3287 value.i = 0; // to initialize value before getting used in CHECK
3288 arrayOop a = check_array(env, arr, true, CHECK_(value));
3289 assert(a->is_typeArray(), "just checking");
3290 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3291 BasicType wide_type = (BasicType) wCode;
3292 if (type != wide_type) {
3293 Reflection::widen(&value, type, wide_type, CHECK_(value));
3294 }
3295 return value;
3296 JVM_END
3299 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3300 JVMWrapper("JVM_SetArrayElement");
3301 arrayOop a = check_array(env, arr, false, CHECK);
3302 oop box = JNIHandles::resolve(val);
3303 jvalue value;
3304 value.i = 0; // to initialize value before getting used in CHECK
3305 BasicType value_type;
3306 if (a->is_objArray()) {
3307 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3308 value_type = Reflection::unbox_for_regular_object(box, &value);
3309 } else {
3310 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3311 }
3312 Reflection::array_set(&value, a, index, value_type, CHECK);
3313 JVM_END
3316 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3317 JVMWrapper("JVM_SetPrimitiveArrayElement");
3318 arrayOop a = check_array(env, arr, true, CHECK);
3319 assert(a->is_typeArray(), "just checking");
3320 BasicType value_type = (BasicType) vCode;
3321 Reflection::array_set(&v, a, index, value_type, CHECK);
3322 JVM_END
3325 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3326 JVMWrapper("JVM_NewArray");
3327 JvmtiVMObjectAllocEventCollector oam;
3328 oop element_mirror = JNIHandles::resolve(eltClass);
3329 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3330 return JNIHandles::make_local(env, result);
3331 JVM_END
3334 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3335 JVMWrapper("JVM_NewMultiArray");
3336 JvmtiVMObjectAllocEventCollector oam;
3337 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3338 oop element_mirror = JNIHandles::resolve(eltClass);
3339 assert(dim_array->is_typeArray(), "just checking");
3340 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3341 return JNIHandles::make_local(env, result);
3342 JVM_END
3345 // Networking library support ////////////////////////////////////////////////////////////////////
3347 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3348 JVMWrapper("JVM_InitializeSocketLibrary");
3349 return hpi::initialize_socket_library();
3350 JVM_END
3353 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3354 JVMWrapper("JVM_Socket");
3355 return hpi::socket(domain, type, protocol);
3356 JVM_END
3359 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3360 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3361 //%note jvm_r6
3362 return hpi::socket_close(fd);
3363 JVM_END
3366 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3367 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3368 //%note jvm_r6
3369 return hpi::socket_shutdown(fd, howto);
3370 JVM_END
3373 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3374 JVMWrapper2("JVM_Recv (0x%x)", fd);
3375 //%note jvm_r6
3376 return hpi::recv(fd, buf, nBytes, flags);
3377 JVM_END
3380 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3381 JVMWrapper2("JVM_Send (0x%x)", fd);
3382 //%note jvm_r6
3383 return hpi::send(fd, buf, nBytes, flags);
3384 JVM_END
3387 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3388 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3389 //%note jvm_r6
3390 return hpi::timeout(fd, timeout);
3391 JVM_END
3394 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3395 JVMWrapper2("JVM_Listen (0x%x)", fd);
3396 //%note jvm_r6
3397 return hpi::listen(fd, count);
3398 JVM_END
3401 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3402 JVMWrapper2("JVM_Connect (0x%x)", fd);
3403 //%note jvm_r6
3404 return hpi::connect(fd, him, len);
3405 JVM_END
3408 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3409 JVMWrapper2("JVM_Bind (0x%x)", fd);
3410 //%note jvm_r6
3411 return hpi::bind(fd, him, len);
3412 JVM_END
3415 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3416 JVMWrapper2("JVM_Accept (0x%x)", fd);
3417 //%note jvm_r6
3418 return hpi::accept(fd, him, (int *)len);
3419 JVM_END
3422 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3423 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3424 //%note jvm_r6
3425 return hpi::recvfrom(fd, buf, nBytes, flags, from, fromlen);
3426 JVM_END
3429 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3430 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3431 //%note jvm_r6
3432 return hpi::get_sock_name(fd, him, len);
3433 JVM_END
3436 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3437 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3438 //%note jvm_r6
3439 return hpi::sendto(fd, buf, len, flags, to, tolen);
3440 JVM_END
3443 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3444 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3445 //%note jvm_r6
3446 return hpi::socket_available(fd, pbytes);
3447 JVM_END
3450 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3451 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3452 //%note jvm_r6
3453 return hpi::get_sock_opt(fd, level, optname, optval, optlen);
3454 JVM_END
3457 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3458 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3459 //%note jvm_r6
3460 return hpi::set_sock_opt(fd, level, optname, optval, optlen);
3461 JVM_END
3463 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3464 JVMWrapper("JVM_GetHostName");
3465 return hpi::get_host_name(name, namelen);
3466 JVM_END
3468 #ifdef _WINDOWS
3470 JVM_LEAF(struct hostent*, JVM_GetHostByAddr(const char* name, int len, int type))
3471 JVMWrapper("JVM_GetHostByAddr");
3472 return hpi::get_host_by_addr(name, len, type);
3473 JVM_END
3476 JVM_LEAF(struct hostent*, JVM_GetHostByName(char* name))
3477 JVMWrapper("JVM_GetHostByName");
3478 return hpi::get_host_by_name(name);
3479 JVM_END
3482 JVM_LEAF(struct protoent*, JVM_GetProtoByName(char* name))
3483 JVMWrapper("JVM_GetProtoByName");
3484 return hpi::get_proto_by_name(name);
3485 JVM_END
3487 #endif
3489 // Library support ///////////////////////////////////////////////////////////////////////////
3491 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3492 //%note jvm_ct
3493 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3494 char ebuf[1024];
3495 void *load_result;
3496 {
3497 ThreadToNativeFromVM ttnfvm(thread);
3498 load_result = hpi::dll_load(name, ebuf, sizeof ebuf);
3499 }
3500 if (load_result == NULL) {
3501 char msg[1024];
3502 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3503 // Since 'ebuf' may contain a string encoded using
3504 // platform encoding scheme, we need to pass
3505 // Exceptions::unsafe_to_utf8 to the new_exception method
3506 // as the last argument. See bug 6367357.
3507 Handle h_exception =
3508 Exceptions::new_exception(thread,
3509 vmSymbols::java_lang_UnsatisfiedLinkError(),
3510 msg, Exceptions::unsafe_to_utf8);
3512 THROW_HANDLE_0(h_exception);
3513 }
3514 return load_result;
3515 JVM_END
3518 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3519 JVMWrapper("JVM_UnloadLibrary");
3520 hpi::dll_unload(handle);
3521 JVM_END
3524 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3525 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3526 return hpi::dll_lookup(handle, name);
3527 JVM_END
3529 // Floating point support ////////////////////////////////////////////////////////////////////
3531 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3532 JVMWrapper("JVM_IsNaN");
3533 return g_isnan(a);
3534 JVM_END
3538 // JNI version ///////////////////////////////////////////////////////////////////////////////
3540 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3541 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3542 return Threads::is_supported_jni_version_including_1_1(version);
3543 JVM_END
3546 // String support ///////////////////////////////////////////////////////////////////////////
3548 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3549 JVMWrapper("JVM_InternString");
3550 JvmtiVMObjectAllocEventCollector oam;
3551 if (str == NULL) return NULL;
3552 oop string = JNIHandles::resolve_non_null(str);
3553 oop result = StringTable::intern(string, CHECK_NULL);
3554 return (jstring) JNIHandles::make_local(env, result);
3555 JVM_END
3558 // Raw monitor support //////////////////////////////////////////////////////////////////////
3560 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3561 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3562 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3563 // that only works with java threads.
3566 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3567 VM_Exit::block_if_vm_exited();
3568 JVMWrapper("JVM_RawMonitorCreate");
3569 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3570 }
3573 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3574 VM_Exit::block_if_vm_exited();
3575 JVMWrapper("JVM_RawMonitorDestroy");
3576 delete ((Mutex*) mon);
3577 }
3580 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3581 VM_Exit::block_if_vm_exited();
3582 JVMWrapper("JVM_RawMonitorEnter");
3583 ((Mutex*) mon)->jvm_raw_lock();
3584 return 0;
3585 }
3588 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3589 VM_Exit::block_if_vm_exited();
3590 JVMWrapper("JVM_RawMonitorExit");
3591 ((Mutex*) mon)->jvm_raw_unlock();
3592 }
3595 // Support for Serialization
3597 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3598 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3599 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3600 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3602 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3603 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3604 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3605 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3608 void initialize_converter_functions() {
3609 if (JDK_Version::is_gte_jdk14x_version()) {
3610 // These functions only exist for compatibility with 1.3.1 and earlier
3611 return;
3612 }
3614 // called from universe_post_init()
3615 assert(
3616 int_bits_to_float_fn == NULL &&
3617 long_bits_to_double_fn == NULL &&
3618 float_to_int_bits_fn == NULL &&
3619 double_to_long_bits_fn == NULL ,
3620 "initialization done twice"
3621 );
3622 // initialize
3623 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3624 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3625 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3626 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3627 // verify
3628 assert(
3629 int_bits_to_float_fn != NULL &&
3630 long_bits_to_double_fn != NULL &&
3631 float_to_int_bits_fn != NULL &&
3632 double_to_long_bits_fn != NULL ,
3633 "initialization failed"
3634 );
3635 }
3638 // Serialization
3639 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3640 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3641 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3643 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3644 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3645 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3646 oop o = JNIHandles::resolve(obj);
3648 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3649 THROW(vmSymbols::java_lang_NullPointerException());
3650 }
3652 jsize nfids = fids->length();
3653 if (nfids == 0) return;
3655 if (tcodes->length() < nfids) {
3656 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3657 }
3659 jsize off = 0;
3660 /* loop through fields, setting values */
3661 for (jsize i = 0; i < nfids; i++) {
3662 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3663 int field_offset;
3664 if (fid != NULL) {
3665 // NULL is a legal value for fid, but retrieving the field offset
3666 // trigger assertion in that case
3667 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3668 }
3670 switch (tcodes->char_at(i)) {
3671 case 'Z':
3672 if (fid != NULL) {
3673 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3674 o->bool_field_put(field_offset, val);
3675 }
3676 off++;
3677 break;
3679 case 'B':
3680 if (fid != NULL) {
3681 o->byte_field_put(field_offset, dbuf->byte_at(off));
3682 }
3683 off++;
3684 break;
3686 case 'C':
3687 if (fid != NULL) {
3688 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3689 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3690 o->char_field_put(field_offset, val);
3691 }
3692 off += 2;
3693 break;
3695 case 'S':
3696 if (fid != NULL) {
3697 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3698 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3699 o->short_field_put(field_offset, val);
3700 }
3701 off += 2;
3702 break;
3704 case 'I':
3705 if (fid != NULL) {
3706 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3707 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3708 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3709 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3710 o->int_field_put(field_offset, ival);
3711 }
3712 off += 4;
3713 break;
3715 case 'F':
3716 if (fid != NULL) {
3717 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3718 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3719 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
3720 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
3721 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
3722 o->float_field_put(field_offset, fval);
3723 }
3724 off += 4;
3725 break;
3727 case 'J':
3728 if (fid != NULL) {
3729 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3730 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3731 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3732 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3733 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3734 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3735 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3736 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3737 o->long_field_put(field_offset, lval);
3738 }
3739 off += 8;
3740 break;
3742 case 'D':
3743 if (fid != NULL) {
3744 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
3745 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
3746 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
3747 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
3748 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
3749 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
3750 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
3751 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
3752 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
3753 o->double_field_put(field_offset, dval);
3754 }
3755 off += 8;
3756 break;
3758 default:
3759 // Illegal typecode
3760 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3761 }
3762 }
3763 JVM_END
3766 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3767 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3768 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3770 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3771 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3772 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3773 oop o = JNIHandles::resolve(obj);
3775 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3776 THROW(vmSymbols::java_lang_NullPointerException());
3777 }
3779 jsize nfids = fids->length();
3780 if (nfids == 0) return;
3782 if (tcodes->length() < nfids) {
3783 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3784 }
3786 /* loop through fields, fetching values */
3787 jsize off = 0;
3788 for (jsize i = 0; i < nfids; i++) {
3789 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3790 if (fid == NULL) {
3791 THROW(vmSymbols::java_lang_NullPointerException());
3792 }
3793 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3795 switch (tcodes->char_at(i)) {
3796 case 'Z':
3797 {
3798 jboolean val = o->bool_field(field_offset);
3799 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
3800 }
3801 break;
3803 case 'B':
3804 dbuf->byte_at_put(off++, o->byte_field(field_offset));
3805 break;
3807 case 'C':
3808 {
3809 jchar val = o->char_field(field_offset);
3810 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3811 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3812 }
3813 break;
3815 case 'S':
3816 {
3817 jshort val = o->short_field(field_offset);
3818 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3819 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3820 }
3821 break;
3823 case 'I':
3824 {
3825 jint val = o->int_field(field_offset);
3826 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3827 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3828 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3829 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3830 }
3831 break;
3833 case 'F':
3834 {
3835 jfloat fval = o->float_field(field_offset);
3836 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
3837 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
3838 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
3839 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
3840 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
3841 }
3842 break;
3844 case 'J':
3845 {
3846 jlong val = o->long_field(field_offset);
3847 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
3848 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
3849 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
3850 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
3851 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
3852 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
3853 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
3854 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
3855 }
3856 break;
3858 case 'D':
3859 {
3860 jdouble dval = o->double_field(field_offset);
3861 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
3862 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
3863 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
3864 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
3865 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
3866 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
3867 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
3868 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
3869 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
3870 }
3871 break;
3873 default:
3874 // Illegal typecode
3875 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
3876 }
3877 }
3878 JVM_END
3881 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
3883 jclass find_class_from_class_loader(JNIEnv* env, symbolHandle name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
3884 // Security Note:
3885 // The Java level wrapper will perform the necessary security check allowing
3886 // us to pass the NULL as the initiating class loader.
3887 klassOop klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
3888 KlassHandle klass_handle(THREAD, klass);
3889 // Check if we should initialize the class
3890 if (init && klass_handle->oop_is_instance()) {
3891 klass_handle->initialize(CHECK_NULL);
3892 }
3893 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
3894 }
3897 // Internal SQE debugging support ///////////////////////////////////////////////////////////
3899 #ifndef PRODUCT
3901 extern "C" {
3902 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
3903 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
3904 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
3905 }
3907 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
3908 JVMWrapper("JVM_AccessBoolVMFlag");
3909 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
3910 JVM_END
3912 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
3913 JVMWrapper("JVM_AccessVMIntFlag");
3914 intx v;
3915 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
3916 *value = (jint)v;
3917 return result;
3918 JVM_END
3921 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
3922 JVMWrapper("JVM_VMBreakPoint");
3923 oop the_obj = JNIHandles::resolve(obj);
3924 BREAKPOINT;
3925 JVM_END
3928 #endif
3931 //---------------------------------------------------------------------------
3932 //
3933 // Support for old native code-based reflection (pre-JDK 1.4)
3934 // Disabled by default in the product build.
3935 //
3936 // See reflection.hpp for information on SUPPORT_OLD_REFLECTION
3937 //
3938 //---------------------------------------------------------------------------
3940 #ifdef SUPPORT_OLD_REFLECTION
3942 JVM_ENTRY(jobjectArray, JVM_GetClassFields(JNIEnv *env, jclass cls, jint which))
3943 JVMWrapper("JVM_GetClassFields");
3944 JvmtiVMObjectAllocEventCollector oam;
3945 oop mirror = JNIHandles::resolve_non_null(cls);
3946 objArrayOop result = Reflection::reflect_fields(mirror, which, CHECK_NULL);
3947 return (jobjectArray) JNIHandles::make_local(env, result);
3948 JVM_END
3951 JVM_ENTRY(jobjectArray, JVM_GetClassMethods(JNIEnv *env, jclass cls, jint which))
3952 JVMWrapper("JVM_GetClassMethods");
3953 JvmtiVMObjectAllocEventCollector oam;
3954 oop mirror = JNIHandles::resolve_non_null(cls);
3955 objArrayOop result = Reflection::reflect_methods(mirror, which, CHECK_NULL);
3956 //%note jvm_r4
3957 return (jobjectArray) JNIHandles::make_local(env, result);
3958 JVM_END
3961 JVM_ENTRY(jobjectArray, JVM_GetClassConstructors(JNIEnv *env, jclass cls, jint which))
3962 JVMWrapper("JVM_GetClassConstructors");
3963 JvmtiVMObjectAllocEventCollector oam;
3964 oop mirror = JNIHandles::resolve_non_null(cls);
3965 objArrayOop result = Reflection::reflect_constructors(mirror, which, CHECK_NULL);
3966 //%note jvm_r4
3967 return (jobjectArray) JNIHandles::make_local(env, result);
3968 JVM_END
3971 JVM_ENTRY(jobject, JVM_GetClassField(JNIEnv *env, jclass cls, jstring name, jint which))
3972 JVMWrapper("JVM_GetClassField");
3973 JvmtiVMObjectAllocEventCollector oam;
3974 if (name == NULL) return NULL;
3975 Handle str (THREAD, JNIHandles::resolve_non_null(name));
3977 const char* cstr = java_lang_String::as_utf8_string(str());
3978 symbolHandle field_name =
3979 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
3980 if (field_name.is_null()) {
3981 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3982 }
3984 oop mirror = JNIHandles::resolve_non_null(cls);
3985 oop result = Reflection::reflect_field(mirror, field_name(), which, CHECK_NULL);
3986 if (result == NULL) {
3987 THROW_0(vmSymbols::java_lang_NoSuchFieldException());
3988 }
3989 return JNIHandles::make_local(env, result);
3990 JVM_END
3993 JVM_ENTRY(jobject, JVM_GetClassMethod(JNIEnv *env, jclass cls, jstring name, jobjectArray types, jint which))
3994 JVMWrapper("JVM_GetClassMethod");
3995 JvmtiVMObjectAllocEventCollector oam;
3996 if (name == NULL) {
3997 THROW_0(vmSymbols::java_lang_NullPointerException());
3998 }
3999 Handle str (THREAD, JNIHandles::resolve_non_null(name));
4001 const char* cstr = java_lang_String::as_utf8_string(str());
4002 symbolHandle method_name =
4003 symbolHandle(THREAD, SymbolTable::probe(cstr, (int)strlen(cstr)));
4004 if (method_name.is_null()) {
4005 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4006 }
4008 oop mirror = JNIHandles::resolve_non_null(cls);
4009 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4010 oop result = Reflection::reflect_method(mirror, method_name, tarray,
4011 which, CHECK_NULL);
4012 if (result == NULL) {
4013 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4014 }
4015 return JNIHandles::make_local(env, result);
4016 JVM_END
4019 JVM_ENTRY(jobject, JVM_GetClassConstructor(JNIEnv *env, jclass cls, jobjectArray types, jint which))
4020 JVMWrapper("JVM_GetClassConstructor");
4021 JvmtiVMObjectAllocEventCollector oam;
4022 oop mirror = JNIHandles::resolve_non_null(cls);
4023 objArrayHandle tarray (THREAD, objArrayOop(JNIHandles::resolve(types)));
4024 oop result = Reflection::reflect_constructor(mirror, tarray, which, CHECK_NULL);
4025 if (result == NULL) {
4026 THROW_0(vmSymbols::java_lang_NoSuchMethodException());
4027 }
4028 return (jobject) JNIHandles::make_local(env, result);
4029 JVM_END
4032 // Instantiation ///////////////////////////////////////////////////////////////////////////////
4034 JVM_ENTRY(jobject, JVM_NewInstance(JNIEnv *env, jclass cls))
4035 JVMWrapper("JVM_NewInstance");
4036 Handle mirror(THREAD, JNIHandles::resolve_non_null(cls));
4038 methodOop resolved_constructor = java_lang_Class::resolved_constructor(mirror());
4039 if (resolved_constructor == NULL) {
4040 klassOop k = java_lang_Class::as_klassOop(mirror());
4041 // The java.lang.Class object caches a resolved constructor if all the checks
4042 // below were done successfully and a constructor was found.
4044 // Do class based checks
4045 if (java_lang_Class::is_primitive(mirror())) {
4046 const char* msg = "";
4047 if (mirror == Universe::bool_mirror()) msg = "java/lang/Boolean";
4048 else if (mirror == Universe::char_mirror()) msg = "java/lang/Character";
4049 else if (mirror == Universe::float_mirror()) msg = "java/lang/Float";
4050 else if (mirror == Universe::double_mirror()) msg = "java/lang/Double";
4051 else if (mirror == Universe::byte_mirror()) msg = "java/lang/Byte";
4052 else if (mirror == Universe::short_mirror()) msg = "java/lang/Short";
4053 else if (mirror == Universe::int_mirror()) msg = "java/lang/Integer";
4054 else if (mirror == Universe::long_mirror()) msg = "java/lang/Long";
4055 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), msg);
4056 }
4058 // Check whether we are allowed to instantiate this class
4059 Klass::cast(k)->check_valid_for_instantiation(false, CHECK_NULL); // Array classes get caught here
4060 instanceKlassHandle klass(THREAD, k);
4061 // Make sure class is initialized (also so all methods are rewritten)
4062 klass->initialize(CHECK_NULL);
4064 // Lookup default constructor
4065 resolved_constructor = klass->find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature());
4066 if (resolved_constructor == NULL) {
4067 ResourceMark rm(THREAD);
4068 THROW_MSG_0(vmSymbols::java_lang_InstantiationException(), klass->external_name());
4069 }
4071 // Cache result in java.lang.Class object. Does not have to be MT safe.
4072 java_lang_Class::set_resolved_constructor(mirror(), resolved_constructor);
4073 }
4075 assert(resolved_constructor != NULL, "sanity check");
4076 methodHandle constructor = methodHandle(THREAD, resolved_constructor);
4078 // We have an initialized instanceKlass with a default constructor
4079 instanceKlassHandle klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(cls)));
4080 assert(klass->is_initialized() || klass->is_being_initialized(), "sanity check");
4082 // Do security check
4083 klassOop caller_klass = NULL;
4084 if (UsePrivilegedStack) {
4085 caller_klass = thread->security_get_caller_class(2);
4087 if (!Reflection::verify_class_access(caller_klass, klass(), false) ||
4088 !Reflection::verify_field_access(caller_klass,
4089 klass(),
4090 klass(),
4091 constructor->access_flags(),
4092 false,
4093 true)) {
4094 ResourceMark rm(THREAD);
4095 THROW_MSG_0(vmSymbols::java_lang_IllegalAccessException(), klass->external_name());
4096 }
4097 }
4099 // Allocate object and call constructor
4100 Handle receiver = klass->allocate_instance_handle(CHECK_NULL);
4101 JavaCalls::call_default_constructor(thread, constructor, receiver, CHECK_NULL);
4103 jobject res = JNIHandles::make_local(env, receiver());
4104 if (JvmtiExport::should_post_vm_object_alloc()) {
4105 JvmtiExport::post_vm_object_alloc(JavaThread::current(), receiver());
4106 }
4107 return res;
4108 JVM_END
4111 // Field ////////////////////////////////////////////////////////////////////////////////////////////
4113 JVM_ENTRY(jobject, JVM_GetField(JNIEnv *env, jobject field, jobject obj))
4114 JVMWrapper("JVM_GetField");
4115 JvmtiVMObjectAllocEventCollector oam;
4116 Handle field_mirror(thread, JNIHandles::resolve(field));
4117 Handle receiver (thread, JNIHandles::resolve(obj));
4118 fieldDescriptor fd;
4119 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_NULL);
4120 jvalue value;
4121 BasicType type = Reflection::field_get(&value, &fd, receiver);
4122 oop box = Reflection::box(&value, type, CHECK_NULL);
4123 return JNIHandles::make_local(env, box);
4124 JVM_END
4127 JVM_ENTRY(jvalue, JVM_GetPrimitiveField(JNIEnv *env, jobject field, jobject obj, unsigned char wCode))
4128 JVMWrapper("JVM_GetPrimitiveField");
4129 Handle field_mirror(thread, JNIHandles::resolve(field));
4130 Handle receiver (thread, JNIHandles::resolve(obj));
4131 fieldDescriptor fd;
4132 jvalue value;
4133 value.j = 0;
4134 Reflection::resolve_field(field_mirror, receiver, &fd, false, CHECK_(value));
4135 BasicType type = Reflection::field_get(&value, &fd, receiver);
4136 BasicType wide_type = (BasicType) wCode;
4137 if (type != wide_type) {
4138 Reflection::widen(&value, type, wide_type, CHECK_(value));
4139 }
4140 return value;
4141 JVM_END // should really be JVM_END, but that doesn't work for union types!
4144 JVM_ENTRY(void, JVM_SetField(JNIEnv *env, jobject field, jobject obj, jobject val))
4145 JVMWrapper("JVM_SetField");
4146 Handle field_mirror(thread, JNIHandles::resolve(field));
4147 Handle receiver (thread, JNIHandles::resolve(obj));
4148 oop box = JNIHandles::resolve(val);
4149 fieldDescriptor fd;
4150 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4151 BasicType field_type = fd.field_type();
4152 jvalue value;
4153 BasicType value_type;
4154 if (field_type == T_OBJECT || field_type == T_ARRAY) {
4155 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
4156 value_type = Reflection::unbox_for_regular_object(box, &value);
4157 Reflection::field_set(&value, &fd, receiver, field_type, CHECK);
4158 } else {
4159 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
4160 Reflection::field_set(&value, &fd, receiver, value_type, CHECK);
4161 }
4162 JVM_END
4165 JVM_ENTRY(void, JVM_SetPrimitiveField(JNIEnv *env, jobject field, jobject obj, jvalue v, unsigned char vCode))
4166 JVMWrapper("JVM_SetPrimitiveField");
4167 Handle field_mirror(thread, JNIHandles::resolve(field));
4168 Handle receiver (thread, JNIHandles::resolve(obj));
4169 fieldDescriptor fd;
4170 Reflection::resolve_field(field_mirror, receiver, &fd, true, CHECK);
4171 BasicType value_type = (BasicType) vCode;
4172 Reflection::field_set(&v, &fd, receiver, value_type, CHECK);
4173 JVM_END
4176 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4178 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4179 JVMWrapper("JVM_InvokeMethod");
4180 Handle method_handle;
4181 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4182 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4183 Handle receiver(THREAD, JNIHandles::resolve(obj));
4184 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4185 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4186 jobject res = JNIHandles::make_local(env, result);
4187 if (JvmtiExport::should_post_vm_object_alloc()) {
4188 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4189 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4190 if (java_lang_Class::is_primitive(ret_type)) {
4191 // Only for primitive type vm allocates memory for java object.
4192 // See box() method.
4193 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4194 }
4195 }
4196 return res;
4197 } else {
4198 THROW_0(vmSymbols::java_lang_StackOverflowError());
4199 }
4200 JVM_END
4203 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4204 JVMWrapper("JVM_NewInstanceFromConstructor");
4205 oop constructor_mirror = JNIHandles::resolve(c);
4206 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4207 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4208 jobject res = JNIHandles::make_local(env, result);
4209 if (JvmtiExport::should_post_vm_object_alloc()) {
4210 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4211 }
4212 return res;
4213 JVM_END
4215 #endif /* SUPPORT_OLD_REFLECTION */
4217 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4219 JVM_LEAF(jboolean, JVM_SupportsCX8())
4220 JVMWrapper("JVM_SupportsCX8");
4221 return VM_Version::supports_cx8();
4222 JVM_END
4225 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4226 JVMWrapper("JVM_CX8Field");
4227 jlong res;
4228 oop o = JNIHandles::resolve(obj);
4229 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4230 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4232 assert(VM_Version::supports_cx8(), "cx8 not supported");
4233 res = Atomic::cmpxchg(newVal, addr, oldVal);
4235 return res == oldVal;
4236 JVM_END
4238 // DTrace ///////////////////////////////////////////////////////////////////
4240 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4241 JVMWrapper("JVM_DTraceGetVersion");
4242 return (jint)JVM_TRACING_DTRACE_VERSION;
4243 JVM_END
4245 JVM_ENTRY(jlong,JVM_DTraceActivate(
4246 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4247 JVM_DTraceProvider* providers))
4248 JVMWrapper("JVM_DTraceActivate");
4249 return DTraceJSDT::activate(
4250 version, module_name, providers_count, providers, CHECK_0);
4251 JVM_END
4253 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4254 JVMWrapper("JVM_DTraceIsProbeEnabled");
4255 return DTraceJSDT::is_probe_enabled(method);
4256 JVM_END
4258 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4259 JVMWrapper("JVM_DTraceDispose");
4260 DTraceJSDT::dispose(handle);
4261 JVM_END
4263 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4264 JVMWrapper("JVM_DTraceIsSupported");
4265 return DTraceJSDT::is_supported();
4266 JVM_END
4268 // Returns an array of all live Thread objects (VM internal JavaThreads,
4269 // jvmti agent threads, and JNI attaching threads are skipped)
4270 // See CR 6404306 regarding JNI attaching threads
4271 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4272 ResourceMark rm(THREAD);
4273 ThreadsListEnumerator tle(THREAD, false, false);
4274 JvmtiVMObjectAllocEventCollector oam;
4276 int num_threads = tle.num_threads();
4277 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NULL);
4278 objArrayHandle threads_ah(THREAD, r);
4280 for (int i = 0; i < num_threads; i++) {
4281 Handle h = tle.get_threadObj(i);
4282 threads_ah->obj_at_put(i, h());
4283 }
4285 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4286 JVM_END
4289 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4290 // Return StackTraceElement[][], each element is the stack trace of a thread in
4291 // the corresponding entry in the given threads array
4292 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4293 JVMWrapper("JVM_DumpThreads");
4294 JvmtiVMObjectAllocEventCollector oam;
4296 // Check if threads is null
4297 if (threads == NULL) {
4298 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4299 }
4301 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4302 objArrayHandle ah(THREAD, a);
4303 int num_threads = ah->length();
4304 // check if threads is non-empty array
4305 if (num_threads == 0) {
4306 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4307 }
4309 // check if threads is not an array of objects of Thread class
4310 klassOop k = objArrayKlass::cast(ah->klass())->element_klass();
4311 if (k != SystemDictionary::thread_klass()) {
4312 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4313 }
4315 ResourceMark rm(THREAD);
4317 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4318 for (int i = 0; i < num_threads; i++) {
4319 oop thread_obj = ah->obj_at(i);
4320 instanceHandle h(THREAD, (instanceOop) thread_obj);
4321 thread_handle_array->append(h);
4322 }
4324 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4325 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4327 JVM_END
4329 // JVM monitoring and management support
4330 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4331 return Management::get_jmm_interface(version);
4332 JVM_END
4334 // com.sun.tools.attach.VirtualMachine agent properties support
4335 //
4336 // Initialize the agent properties with the properties maintained in the VM
4337 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4338 JVMWrapper("JVM_InitAgentProperties");
4339 ResourceMark rm;
4341 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4343 PUTPROP(props, "sun.java.command", Arguments::java_command());
4344 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4345 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4346 return properties;
4347 JVM_END
4349 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4350 {
4351 JVMWrapper("JVM_GetEnclosingMethodInfo");
4352 JvmtiVMObjectAllocEventCollector oam;
4354 if (ofClass == NULL) {
4355 return NULL;
4356 }
4357 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4358 // Special handling for primitive objects
4359 if (java_lang_Class::is_primitive(mirror())) {
4360 return NULL;
4361 }
4362 klassOop k = java_lang_Class::as_klassOop(mirror());
4363 if (!Klass::cast(k)->oop_is_instance()) {
4364 return NULL;
4365 }
4366 instanceKlassHandle ik_h(THREAD, k);
4367 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4368 if (encl_method_class_idx == 0) {
4369 return NULL;
4370 }
4371 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::object_klass(), 3, CHECK_NULL);
4372 objArrayHandle dest(THREAD, dest_o);
4373 klassOop enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4374 dest->obj_at_put(0, Klass::cast(enc_k)->java_mirror());
4375 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4376 if (encl_method_method_idx != 0) {
4377 symbolOop sym_o = ik_h->constants()->symbol_at(
4378 extract_low_short_from_int(
4379 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4380 symbolHandle sym(THREAD, sym_o);
4381 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4382 dest->obj_at_put(1, str());
4383 sym_o = ik_h->constants()->symbol_at(
4384 extract_high_short_from_int(
4385 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4386 sym = symbolHandle(THREAD, sym_o);
4387 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4388 dest->obj_at_put(2, str());
4389 }
4390 return (jobjectArray) JNIHandles::make_local(dest());
4391 }
4392 JVM_END
4394 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4395 jint javaThreadState))
4396 {
4397 // If new thread states are added in future JDK and VM versions,
4398 // this should check if the JDK version is compatible with thread
4399 // states supported by the VM. Return NULL if not compatible.
4400 //
4401 // This function must map the VM java_lang_Thread::ThreadStatus
4402 // to the Java thread state that the JDK supports.
4403 //
4405 typeArrayHandle values_h;
4406 switch (javaThreadState) {
4407 case JAVA_THREAD_STATE_NEW : {
4408 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4409 values_h = typeArrayHandle(THREAD, r);
4410 values_h->int_at_put(0, java_lang_Thread::NEW);
4411 break;
4412 }
4413 case JAVA_THREAD_STATE_RUNNABLE : {
4414 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4415 values_h = typeArrayHandle(THREAD, r);
4416 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4417 break;
4418 }
4419 case JAVA_THREAD_STATE_BLOCKED : {
4420 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4421 values_h = typeArrayHandle(THREAD, r);
4422 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4423 break;
4424 }
4425 case JAVA_THREAD_STATE_WAITING : {
4426 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4427 values_h = typeArrayHandle(THREAD, r);
4428 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4429 values_h->int_at_put(1, java_lang_Thread::PARKED);
4430 break;
4431 }
4432 case JAVA_THREAD_STATE_TIMED_WAITING : {
4433 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4434 values_h = typeArrayHandle(THREAD, r);
4435 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4436 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4437 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4438 break;
4439 }
4440 case JAVA_THREAD_STATE_TERMINATED : {
4441 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4442 values_h = typeArrayHandle(THREAD, r);
4443 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4444 break;
4445 }
4446 default:
4447 // Unknown state - probably incompatible JDK version
4448 return NULL;
4449 }
4451 return (jintArray) JNIHandles::make_local(env, values_h());
4452 }
4453 JVM_END
4456 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4457 jint javaThreadState,
4458 jintArray values))
4459 {
4460 // If new thread states are added in future JDK and VM versions,
4461 // this should check if the JDK version is compatible with thread
4462 // states supported by the VM. Return NULL if not compatible.
4463 //
4464 // This function must map the VM java_lang_Thread::ThreadStatus
4465 // to the Java thread state that the JDK supports.
4466 //
4468 ResourceMark rm;
4470 // Check if threads is null
4471 if (values == NULL) {
4472 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4473 }
4475 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4476 typeArrayHandle values_h(THREAD, v);
4478 objArrayHandle names_h;
4479 switch (javaThreadState) {
4480 case JAVA_THREAD_STATE_NEW : {
4481 assert(values_h->length() == 1 &&
4482 values_h->int_at(0) == java_lang_Thread::NEW,
4483 "Invalid threadStatus value");
4485 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4486 1, /* only 1 substate */
4487 CHECK_NULL);
4488 names_h = objArrayHandle(THREAD, r);
4489 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4490 names_h->obj_at_put(0, name());
4491 break;
4492 }
4493 case JAVA_THREAD_STATE_RUNNABLE : {
4494 assert(values_h->length() == 1 &&
4495 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4496 "Invalid threadStatus value");
4498 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4499 1, /* only 1 substate */
4500 CHECK_NULL);
4501 names_h = objArrayHandle(THREAD, r);
4502 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4503 names_h->obj_at_put(0, name());
4504 break;
4505 }
4506 case JAVA_THREAD_STATE_BLOCKED : {
4507 assert(values_h->length() == 1 &&
4508 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4509 "Invalid threadStatus value");
4511 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4512 1, /* only 1 substate */
4513 CHECK_NULL);
4514 names_h = objArrayHandle(THREAD, r);
4515 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4516 names_h->obj_at_put(0, name());
4517 break;
4518 }
4519 case JAVA_THREAD_STATE_WAITING : {
4520 assert(values_h->length() == 2 &&
4521 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4522 values_h->int_at(1) == java_lang_Thread::PARKED,
4523 "Invalid threadStatus value");
4524 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4525 2, /* number of substates */
4526 CHECK_NULL);
4527 names_h = objArrayHandle(THREAD, r);
4528 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4529 CHECK_NULL);
4530 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4531 CHECK_NULL);
4532 names_h->obj_at_put(0, name0());
4533 names_h->obj_at_put(1, name1());
4534 break;
4535 }
4536 case JAVA_THREAD_STATE_TIMED_WAITING : {
4537 assert(values_h->length() == 3 &&
4538 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4539 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4540 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4541 "Invalid threadStatus value");
4542 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4543 3, /* number of substates */
4544 CHECK_NULL);
4545 names_h = objArrayHandle(THREAD, r);
4546 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4547 CHECK_NULL);
4548 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4549 CHECK_NULL);
4550 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4551 CHECK_NULL);
4552 names_h->obj_at_put(0, name0());
4553 names_h->obj_at_put(1, name1());
4554 names_h->obj_at_put(2, name2());
4555 break;
4556 }
4557 case JAVA_THREAD_STATE_TERMINATED : {
4558 assert(values_h->length() == 1 &&
4559 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4560 "Invalid threadStatus value");
4561 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
4562 1, /* only 1 substate */
4563 CHECK_NULL);
4564 names_h = objArrayHandle(THREAD, r);
4565 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4566 names_h->obj_at_put(0, name());
4567 break;
4568 }
4569 default:
4570 // Unknown state - probably incompatible JDK version
4571 return NULL;
4572 }
4573 return (jobjectArray) JNIHandles::make_local(env, names_h());
4574 }
4575 JVM_END
4577 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4578 {
4579 memset(info, 0, sizeof(info_size));
4581 info->jvm_version = Abstract_VM_Version::jvm_version();
4582 info->update_version = 0; /* 0 in HotSpot Express VM */
4583 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4585 // when we add a new capability in the jvm_version_info struct, we should also
4586 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4587 // counter defined in runtimeService.cpp.
4588 info->is_attachable = AttachListener::is_attach_supported();
4589 #ifdef KERNEL
4590 info->is_kernel_jvm = 1; // true;
4591 #else // KERNEL
4592 info->is_kernel_jvm = 0; // false;
4593 #endif // KERNEL
4594 }
4595 JVM_END