Wed, 22 May 2013 14:37:49 -0400
8003421: NPG: Move oops out of InstanceKlass into mirror
Summary: Inject protection_domain, signers, init_lock into java_lang_Class
Reviewed-by: stefank, dholmes, sla
1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/javaClasses.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "gc_interface/collectedHeap.inline.hpp"
33 #include "interpreter/bytecode.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.inline.hpp"
36 #include "oops/fieldStreams.hpp"
37 #include "oops/instanceKlass.hpp"
38 #include "oops/objArrayKlass.hpp"
39 #include "oops/method.hpp"
40 #include "prims/jvm.h"
41 #include "prims/jvm_misc.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "prims/jvmtiThreadState.hpp"
44 #include "prims/nativeLookup.hpp"
45 #include "prims/privilegedStack.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/dtraceJSDT.hpp"
48 #include "runtime/handles.inline.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jfieldIDWorkaround.hpp"
54 #include "runtime/os.hpp"
55 #include "runtime/perfData.hpp"
56 #include "runtime/reflection.hpp"
57 #include "runtime/vframe.hpp"
58 #include "runtime/vm_operations.hpp"
59 #include "services/attachListener.hpp"
60 #include "services/management.hpp"
61 #include "services/threadService.hpp"
62 #include "utilities/copy.hpp"
63 #include "utilities/defaultStream.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/histogram.hpp"
67 #include "utilities/top.hpp"
68 #include "utilities/utf8.hpp"
69 #ifdef TARGET_OS_FAMILY_linux
70 # include "jvm_linux.h"
71 #endif
72 #ifdef TARGET_OS_FAMILY_solaris
73 # include "jvm_solaris.h"
74 #endif
75 #ifdef TARGET_OS_FAMILY_windows
76 # include "jvm_windows.h"
77 #endif
78 #ifdef TARGET_OS_FAMILY_bsd
79 # include "jvm_bsd.h"
80 #endif
82 #include <errno.h>
84 #ifndef USDT2
85 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__begin, long long);
86 HS_DTRACE_PROBE_DECL1(hotspot, thread__sleep__end, int);
87 HS_DTRACE_PROBE_DECL0(hotspot, thread__yield);
88 #endif /* !USDT2 */
90 /*
91 NOTE about use of any ctor or function call that can trigger a safepoint/GC:
92 such ctors and calls MUST NOT come between an oop declaration/init and its
93 usage because if objects are move this may cause various memory stomps, bus
94 errors and segfaults. Here is a cookbook for causing so called "naked oop
95 failures":
97 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields<etc> {
98 JVMWrapper("JVM_GetClassDeclaredFields");
100 // Object address to be held directly in mirror & not visible to GC
101 oop mirror = JNIHandles::resolve_non_null(ofClass);
103 // If this ctor can hit a safepoint, moving objects around, then
104 ComplexConstructor foo;
106 // Boom! mirror may point to JUNK instead of the intended object
107 (some dereference of mirror)
109 // Here's another call that may block for GC, making mirror stale
110 MutexLocker ml(some_lock);
112 // And here's an initializer that can result in a stale oop
113 // all in one step.
114 oop o = call_that_can_throw_exception(TRAPS);
117 The solution is to keep the oop declaration BELOW the ctor or function
118 call that might cause a GC, do another resolve to reassign the oop, or
119 consider use of a Handle instead of an oop so there is immunity from object
120 motion. But note that the "QUICK" entries below do not have a handlemark
121 and thus can only support use of handles passed in.
122 */
124 static void trace_class_resolution_impl(Klass* to_class, TRAPS) {
125 ResourceMark rm;
126 int line_number = -1;
127 const char * source_file = NULL;
128 const char * trace = "explicit";
129 InstanceKlass* caller = NULL;
130 JavaThread* jthread = JavaThread::current();
131 if (jthread->has_last_Java_frame()) {
132 vframeStream vfst(jthread);
134 // scan up the stack skipping ClassLoader, AccessController and PrivilegedAction frames
135 TempNewSymbol access_controller = SymbolTable::new_symbol("java/security/AccessController", CHECK);
136 Klass* access_controller_klass = SystemDictionary::resolve_or_fail(access_controller, false, CHECK);
137 TempNewSymbol privileged_action = SymbolTable::new_symbol("java/security/PrivilegedAction", CHECK);
138 Klass* privileged_action_klass = SystemDictionary::resolve_or_fail(privileged_action, false, CHECK);
140 Method* last_caller = NULL;
142 while (!vfst.at_end()) {
143 Method* m = vfst.method();
144 if (!vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass())&&
145 !vfst.method()->method_holder()->is_subclass_of(access_controller_klass) &&
146 !vfst.method()->method_holder()->is_subclass_of(privileged_action_klass)) {
147 break;
148 }
149 last_caller = m;
150 vfst.next();
151 }
152 // if this is called from Class.forName0 and that is called from Class.forName,
153 // then print the caller of Class.forName. If this is Class.loadClass, then print
154 // that caller, otherwise keep quiet since this should be picked up elsewhere.
155 bool found_it = false;
156 if (!vfst.at_end() &&
157 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
158 vfst.method()->name() == vmSymbols::forName0_name()) {
159 vfst.next();
160 if (!vfst.at_end() &&
161 vfst.method()->method_holder()->name() == vmSymbols::java_lang_Class() &&
162 vfst.method()->name() == vmSymbols::forName_name()) {
163 vfst.next();
164 found_it = true;
165 }
166 } else if (last_caller != NULL &&
167 last_caller->method_holder()->name() ==
168 vmSymbols::java_lang_ClassLoader() &&
169 (last_caller->name() == vmSymbols::loadClassInternal_name() ||
170 last_caller->name() == vmSymbols::loadClass_name())) {
171 found_it = true;
172 } else if (!vfst.at_end()) {
173 if (vfst.method()->is_native()) {
174 // JNI call
175 found_it = true;
176 }
177 }
178 if (found_it && !vfst.at_end()) {
179 // found the caller
180 caller = vfst.method()->method_holder();
181 line_number = vfst.method()->line_number_from_bci(vfst.bci());
182 if (line_number == -1) {
183 // show method name if it's a native method
184 trace = vfst.method()->name_and_sig_as_C_string();
185 }
186 Symbol* s = caller->source_file_name();
187 if (s != NULL) {
188 source_file = s->as_C_string();
189 }
190 }
191 }
192 if (caller != NULL) {
193 if (to_class != caller) {
194 const char * from = caller->external_name();
195 const char * to = to_class->external_name();
196 // print in a single call to reduce interleaving between threads
197 if (source_file != NULL) {
198 tty->print("RESOLVE %s %s %s:%d (%s)\n", from, to, source_file, line_number, trace);
199 } else {
200 tty->print("RESOLVE %s %s (%s)\n", from, to, trace);
201 }
202 }
203 }
204 }
206 void trace_class_resolution(Klass* to_class) {
207 EXCEPTION_MARK;
208 trace_class_resolution_impl(to_class, THREAD);
209 if (HAS_PENDING_EXCEPTION) {
210 CLEAR_PENDING_EXCEPTION;
211 }
212 }
214 // Wrapper to trace JVM functions
216 #ifdef ASSERT
217 class JVMTraceWrapper : public StackObj {
218 public:
219 JVMTraceWrapper(const char* format, ...) {
220 if (TraceJVMCalls) {
221 va_list ap;
222 va_start(ap, format);
223 tty->print("JVM ");
224 tty->vprint_cr(format, ap);
225 va_end(ap);
226 }
227 }
228 };
230 Histogram* JVMHistogram;
231 volatile jint JVMHistogram_lock = 0;
233 class JVMHistogramElement : public HistogramElement {
234 public:
235 JVMHistogramElement(const char* name);
236 };
238 JVMHistogramElement::JVMHistogramElement(const char* elementName) {
239 _name = elementName;
240 uintx count = 0;
242 while (Atomic::cmpxchg(1, &JVMHistogram_lock, 0) != 0) {
243 while (OrderAccess::load_acquire(&JVMHistogram_lock) != 0) {
244 count +=1;
245 if ( (WarnOnStalledSpinLock > 0)
246 && (count % WarnOnStalledSpinLock == 0)) {
247 warning("JVMHistogram_lock seems to be stalled");
248 }
249 }
250 }
252 if(JVMHistogram == NULL)
253 JVMHistogram = new Histogram("JVM Call Counts",100);
255 JVMHistogram->add_element(this);
256 Atomic::dec(&JVMHistogram_lock);
257 }
259 #define JVMCountWrapper(arg) \
260 static JVMHistogramElement* e = new JVMHistogramElement(arg); \
261 if (e != NULL) e->increment_count(); // Due to bug in VC++, we need a NULL check here eventhough it should never happen!
263 #define JVMWrapper(arg1) JVMCountWrapper(arg1); JVMTraceWrapper(arg1)
264 #define JVMWrapper2(arg1, arg2) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2)
265 #define JVMWrapper3(arg1, arg2, arg3) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3)
266 #define JVMWrapper4(arg1, arg2, arg3, arg4) JVMCountWrapper(arg1); JVMTraceWrapper(arg1, arg2, arg3, arg4)
267 #else
268 #define JVMWrapper(arg1)
269 #define JVMWrapper2(arg1, arg2)
270 #define JVMWrapper3(arg1, arg2, arg3)
271 #define JVMWrapper4(arg1, arg2, arg3, arg4)
272 #endif
275 // Interface version /////////////////////////////////////////////////////////////////////
278 JVM_LEAF(jint, JVM_GetInterfaceVersion())
279 return JVM_INTERFACE_VERSION;
280 JVM_END
283 // java.lang.System //////////////////////////////////////////////////////////////////////
286 JVM_LEAF(jlong, JVM_CurrentTimeMillis(JNIEnv *env, jclass ignored))
287 JVMWrapper("JVM_CurrentTimeMillis");
288 return os::javaTimeMillis();
289 JVM_END
291 JVM_LEAF(jlong, JVM_NanoTime(JNIEnv *env, jclass ignored))
292 JVMWrapper("JVM_NanoTime");
293 return os::javaTimeNanos();
294 JVM_END
297 JVM_ENTRY(void, JVM_ArrayCopy(JNIEnv *env, jclass ignored, jobject src, jint src_pos,
298 jobject dst, jint dst_pos, jint length))
299 JVMWrapper("JVM_ArrayCopy");
300 // Check if we have null pointers
301 if (src == NULL || dst == NULL) {
302 THROW(vmSymbols::java_lang_NullPointerException());
303 }
304 arrayOop s = arrayOop(JNIHandles::resolve_non_null(src));
305 arrayOop d = arrayOop(JNIHandles::resolve_non_null(dst));
306 assert(s->is_oop(), "JVM_ArrayCopy: src not an oop");
307 assert(d->is_oop(), "JVM_ArrayCopy: dst not an oop");
308 // Do copy
309 s->klass()->copy_array(s, src_pos, d, dst_pos, length, thread);
310 JVM_END
313 static void set_property(Handle props, const char* key, const char* value, TRAPS) {
314 JavaValue r(T_OBJECT);
315 // public synchronized Object put(Object key, Object value);
316 HandleMark hm(THREAD);
317 Handle key_str = java_lang_String::create_from_platform_dependent_str(key, CHECK);
318 Handle value_str = java_lang_String::create_from_platform_dependent_str((value != NULL ? value : ""), CHECK);
319 JavaCalls::call_virtual(&r,
320 props,
321 KlassHandle(THREAD, SystemDictionary::Properties_klass()),
322 vmSymbols::put_name(),
323 vmSymbols::object_object_object_signature(),
324 key_str,
325 value_str,
326 THREAD);
327 }
330 #define PUTPROP(props, name, value) set_property((props), (name), (value), CHECK_(properties));
333 JVM_ENTRY(jobject, JVM_InitProperties(JNIEnv *env, jobject properties))
334 JVMWrapper("JVM_InitProperties");
335 ResourceMark rm;
337 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
339 // System property list includes both user set via -D option and
340 // jvm system specific properties.
341 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
342 PUTPROP(props, p->key(), p->value());
343 }
345 // Convert the -XX:MaxDirectMemorySize= command line flag
346 // to the sun.nio.MaxDirectMemorySize property.
347 // Do this after setting user properties to prevent people
348 // from setting the value with a -D option, as requested.
349 {
350 if (FLAG_IS_DEFAULT(MaxDirectMemorySize)) {
351 PUTPROP(props, "sun.nio.MaxDirectMemorySize", "-1");
352 } else {
353 char as_chars[256];
354 jio_snprintf(as_chars, sizeof(as_chars), UINTX_FORMAT, MaxDirectMemorySize);
355 PUTPROP(props, "sun.nio.MaxDirectMemorySize", as_chars);
356 }
357 }
359 // JVM monitoring and management support
360 // Add the sun.management.compiler property for the compiler's name
361 {
362 #undef CSIZE
363 #if defined(_LP64) || defined(_WIN64)
364 #define CSIZE "64-Bit "
365 #else
366 #define CSIZE
367 #endif // 64bit
369 #ifdef TIERED
370 const char* compiler_name = "HotSpot " CSIZE "Tiered Compilers";
371 #else
372 #if defined(COMPILER1)
373 const char* compiler_name = "HotSpot " CSIZE "Client Compiler";
374 #elif defined(COMPILER2)
375 const char* compiler_name = "HotSpot " CSIZE "Server Compiler";
376 #else
377 const char* compiler_name = "";
378 #endif // compilers
379 #endif // TIERED
381 if (*compiler_name != '\0' &&
382 (Arguments::mode() != Arguments::_int)) {
383 PUTPROP(props, "sun.management.compiler", compiler_name);
384 }
385 }
387 return properties;
388 JVM_END
391 // java.lang.Runtime /////////////////////////////////////////////////////////////////////////
393 extern volatile jint vm_created;
395 JVM_ENTRY_NO_ENV(void, JVM_Exit(jint code))
396 if (vm_created != 0 && (code == 0)) {
397 // The VM is about to exit. We call back into Java to check whether finalizers should be run
398 Universe::run_finalizers_on_exit();
399 }
400 before_exit(thread);
401 vm_exit(code);
402 JVM_END
405 JVM_ENTRY_NO_ENV(void, JVM_Halt(jint code))
406 before_exit(thread);
407 vm_exit(code);
408 JVM_END
411 JVM_LEAF(void, JVM_OnExit(void (*func)(void)))
412 register_on_exit_function(func);
413 JVM_END
416 JVM_ENTRY_NO_ENV(void, JVM_GC(void))
417 JVMWrapper("JVM_GC");
418 if (!DisableExplicitGC) {
419 Universe::heap()->collect(GCCause::_java_lang_system_gc);
420 }
421 JVM_END
424 JVM_LEAF(jlong, JVM_MaxObjectInspectionAge(void))
425 JVMWrapper("JVM_MaxObjectInspectionAge");
426 return Universe::heap()->millis_since_last_gc();
427 JVM_END
430 JVM_LEAF(void, JVM_TraceInstructions(jboolean on))
431 if (PrintJVMWarnings) warning("JVM_TraceInstructions not supported");
432 JVM_END
435 JVM_LEAF(void, JVM_TraceMethodCalls(jboolean on))
436 if (PrintJVMWarnings) warning("JVM_TraceMethodCalls not supported");
437 JVM_END
439 static inline jlong convert_size_t_to_jlong(size_t val) {
440 // In the 64-bit vm, a size_t can overflow a jlong (which is signed).
441 NOT_LP64 (return (jlong)val;)
442 LP64_ONLY(return (jlong)MIN2(val, (size_t)max_jlong);)
443 }
445 JVM_ENTRY_NO_ENV(jlong, JVM_TotalMemory(void))
446 JVMWrapper("JVM_TotalMemory");
447 size_t n = Universe::heap()->capacity();
448 return convert_size_t_to_jlong(n);
449 JVM_END
452 JVM_ENTRY_NO_ENV(jlong, JVM_FreeMemory(void))
453 JVMWrapper("JVM_FreeMemory");
454 CollectedHeap* ch = Universe::heap();
455 size_t n;
456 {
457 MutexLocker x(Heap_lock);
458 n = ch->capacity() - ch->used();
459 }
460 return convert_size_t_to_jlong(n);
461 JVM_END
464 JVM_ENTRY_NO_ENV(jlong, JVM_MaxMemory(void))
465 JVMWrapper("JVM_MaxMemory");
466 size_t n = Universe::heap()->max_capacity();
467 return convert_size_t_to_jlong(n);
468 JVM_END
471 JVM_ENTRY_NO_ENV(jint, JVM_ActiveProcessorCount(void))
472 JVMWrapper("JVM_ActiveProcessorCount");
473 return os::active_processor_count();
474 JVM_END
478 // java.lang.Throwable //////////////////////////////////////////////////////
481 JVM_ENTRY(void, JVM_FillInStackTrace(JNIEnv *env, jobject receiver))
482 JVMWrapper("JVM_FillInStackTrace");
483 Handle exception(thread, JNIHandles::resolve_non_null(receiver));
484 java_lang_Throwable::fill_in_stack_trace(exception);
485 JVM_END
488 JVM_ENTRY(jint, JVM_GetStackTraceDepth(JNIEnv *env, jobject throwable))
489 JVMWrapper("JVM_GetStackTraceDepth");
490 oop exception = JNIHandles::resolve(throwable);
491 return java_lang_Throwable::get_stack_trace_depth(exception, THREAD);
492 JVM_END
495 JVM_ENTRY(jobject, JVM_GetStackTraceElement(JNIEnv *env, jobject throwable, jint index))
496 JVMWrapper("JVM_GetStackTraceElement");
497 JvmtiVMObjectAllocEventCollector oam; // This ctor (throughout this module) may trigger a safepoint/GC
498 oop exception = JNIHandles::resolve(throwable);
499 oop element = java_lang_Throwable::get_stack_trace_element(exception, index, CHECK_NULL);
500 return JNIHandles::make_local(env, element);
501 JVM_END
504 // java.lang.Object ///////////////////////////////////////////////
507 JVM_ENTRY(jint, JVM_IHashCode(JNIEnv* env, jobject handle))
508 JVMWrapper("JVM_IHashCode");
509 // as implemented in the classic virtual machine; return 0 if object is NULL
510 return handle == NULL ? 0 : ObjectSynchronizer::FastHashCode (THREAD, JNIHandles::resolve_non_null(handle)) ;
511 JVM_END
514 JVM_ENTRY(void, JVM_MonitorWait(JNIEnv* env, jobject handle, jlong ms))
515 JVMWrapper("JVM_MonitorWait");
516 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
517 JavaThreadInObjectWaitState jtiows(thread, ms != 0);
518 if (JvmtiExport::should_post_monitor_wait()) {
519 JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
520 }
521 ObjectSynchronizer::wait(obj, ms, CHECK);
522 JVM_END
525 JVM_ENTRY(void, JVM_MonitorNotify(JNIEnv* env, jobject handle))
526 JVMWrapper("JVM_MonitorNotify");
527 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
528 ObjectSynchronizer::notify(obj, CHECK);
529 JVM_END
532 JVM_ENTRY(void, JVM_MonitorNotifyAll(JNIEnv* env, jobject handle))
533 JVMWrapper("JVM_MonitorNotifyAll");
534 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
535 ObjectSynchronizer::notifyall(obj, CHECK);
536 JVM_END
539 JVM_ENTRY(jobject, JVM_Clone(JNIEnv* env, jobject handle))
540 JVMWrapper("JVM_Clone");
541 Handle obj(THREAD, JNIHandles::resolve_non_null(handle));
542 const KlassHandle klass (THREAD, obj->klass());
543 JvmtiVMObjectAllocEventCollector oam;
545 #ifdef ASSERT
546 // Just checking that the cloneable flag is set correct
547 if (obj->is_array()) {
548 guarantee(klass->is_cloneable(), "all arrays are cloneable");
549 } else {
550 guarantee(obj->is_instance(), "should be instanceOop");
551 bool cloneable = klass->is_subtype_of(SystemDictionary::Cloneable_klass());
552 guarantee(cloneable == klass->is_cloneable(), "incorrect cloneable flag");
553 }
554 #endif
556 // Check if class of obj supports the Cloneable interface.
557 // All arrays are considered to be cloneable (See JLS 20.1.5)
558 if (!klass->is_cloneable()) {
559 ResourceMark rm(THREAD);
560 THROW_MSG_0(vmSymbols::java_lang_CloneNotSupportedException(), klass->external_name());
561 }
563 // Make shallow object copy
564 const int size = obj->size();
565 oop new_obj = NULL;
566 if (obj->is_array()) {
567 const int length = ((arrayOop)obj())->length();
568 new_obj = CollectedHeap::array_allocate(klass, size, length, CHECK_NULL);
569 } else {
570 new_obj = CollectedHeap::obj_allocate(klass, size, CHECK_NULL);
571 }
572 // 4839641 (4840070): We must do an oop-atomic copy, because if another thread
573 // is modifying a reference field in the clonee, a non-oop-atomic copy might
574 // be suspended in the middle of copying the pointer and end up with parts
575 // of two different pointers in the field. Subsequent dereferences will crash.
576 // 4846409: an oop-copy of objects with long or double fields or arrays of same
577 // won't copy the longs/doubles atomically in 32-bit vm's, so we copy jlongs instead
578 // of oops. We know objects are aligned on a minimum of an jlong boundary.
579 // The same is true of StubRoutines::object_copy and the various oop_copy
580 // variants, and of the code generated by the inline_native_clone intrinsic.
581 assert(MinObjAlignmentInBytes >= BytesPerLong, "objects misaligned");
582 Copy::conjoint_jlongs_atomic((jlong*)obj(), (jlong*)new_obj,
583 (size_t)align_object_size(size) / HeapWordsPerLong);
584 // Clear the header
585 new_obj->init_mark();
587 // Store check (mark entire object and let gc sort it out)
588 BarrierSet* bs = Universe::heap()->barrier_set();
589 assert(bs->has_write_region_opt(), "Barrier set does not have write_region");
590 bs->write_region(MemRegion((HeapWord*)new_obj, size));
592 // Caution: this involves a java upcall, so the clone should be
593 // "gc-robust" by this stage.
594 if (klass->has_finalizer()) {
595 assert(obj->is_instance(), "should be instanceOop");
596 new_obj = InstanceKlass::register_finalizer(instanceOop(new_obj), CHECK_NULL);
597 }
599 return JNIHandles::make_local(env, oop(new_obj));
600 JVM_END
602 // java.lang.Compiler ////////////////////////////////////////////////////
604 // The initial cuts of the HotSpot VM will not support JITs, and all existing
605 // JITs would need extensive changes to work with HotSpot. The JIT-related JVM
606 // functions are all silently ignored unless JVM warnings are printed.
608 JVM_LEAF(void, JVM_InitializeCompiler (JNIEnv *env, jclass compCls))
609 if (PrintJVMWarnings) warning("JVM_InitializeCompiler not supported");
610 JVM_END
613 JVM_LEAF(jboolean, JVM_IsSilentCompiler(JNIEnv *env, jclass compCls))
614 if (PrintJVMWarnings) warning("JVM_IsSilentCompiler not supported");
615 return JNI_FALSE;
616 JVM_END
619 JVM_LEAF(jboolean, JVM_CompileClass(JNIEnv *env, jclass compCls, jclass cls))
620 if (PrintJVMWarnings) warning("JVM_CompileClass not supported");
621 return JNI_FALSE;
622 JVM_END
625 JVM_LEAF(jboolean, JVM_CompileClasses(JNIEnv *env, jclass cls, jstring jname))
626 if (PrintJVMWarnings) warning("JVM_CompileClasses not supported");
627 return JNI_FALSE;
628 JVM_END
631 JVM_LEAF(jobject, JVM_CompilerCommand(JNIEnv *env, jclass compCls, jobject arg))
632 if (PrintJVMWarnings) warning("JVM_CompilerCommand not supported");
633 return NULL;
634 JVM_END
637 JVM_LEAF(void, JVM_EnableCompiler(JNIEnv *env, jclass compCls))
638 if (PrintJVMWarnings) warning("JVM_EnableCompiler not supported");
639 JVM_END
642 JVM_LEAF(void, JVM_DisableCompiler(JNIEnv *env, jclass compCls))
643 if (PrintJVMWarnings) warning("JVM_DisableCompiler not supported");
644 JVM_END
648 // Error message support //////////////////////////////////////////////////////
650 JVM_LEAF(jint, JVM_GetLastErrorString(char *buf, int len))
651 JVMWrapper("JVM_GetLastErrorString");
652 return (jint)os::lasterror(buf, len);
653 JVM_END
656 // java.io.File ///////////////////////////////////////////////////////////////
658 JVM_LEAF(char*, JVM_NativePath(char* path))
659 JVMWrapper2("JVM_NativePath (%s)", path);
660 return os::native_path(path);
661 JVM_END
664 // Misc. class handling ///////////////////////////////////////////////////////////
667 JVM_ENTRY(jclass, JVM_GetCallerClass(JNIEnv* env, int depth))
668 JVMWrapper("JVM_GetCallerClass");
670 // Pre-JDK 8 and early builds of JDK 8 don't have a CallerSensitive annotation.
671 if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) {
672 Klass* k = thread->security_get_caller_class(depth);
673 return (k == NULL) ? NULL : (jclass) JNIHandles::make_local(env, k->java_mirror());
674 } else {
675 // Basic handshaking with Java_sun_reflect_Reflection_getCallerClass
676 assert(depth == -1, "wrong handshake depth");
677 }
679 // Getting the class of the caller frame.
680 //
681 // The call stack at this point looks something like this:
682 //
683 // [0] [ @CallerSensitive public sun.reflect.Reflection.getCallerClass ]
684 // [1] [ @CallerSensitive API.method ]
685 // [.] [ (skipped intermediate frames) ]
686 // [n] [ caller ]
687 vframeStream vfst(thread);
688 // Cf. LibraryCallKit::inline_native_Reflection_getCallerClass
689 for (int n = 0; !vfst.at_end(); vfst.security_next(), n++) {
690 Method* m = vfst.method();
691 assert(m != NULL, "sanity");
692 switch (n) {
693 case 0:
694 // This must only be called from Reflection.getCallerClass
695 if (m->intrinsic_id() != vmIntrinsics::_getCallerClass) {
696 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetCallerClass must only be called from Reflection.getCallerClass");
697 }
698 // fall-through
699 case 1:
700 // Frame 0 and 1 must be caller sensitive.
701 if (!m->caller_sensitive()) {
702 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), err_msg("CallerSensitive annotation expected at frame %d", n));
703 }
704 break;
705 default:
706 if (!m->is_ignored_by_security_stack_walk()) {
707 // We have reached the desired frame; return the holder class.
708 return (jclass) JNIHandles::make_local(env, m->method_holder()->java_mirror());
709 }
710 break;
711 }
712 }
713 return NULL;
714 JVM_END
717 JVM_ENTRY(jclass, JVM_FindPrimitiveClass(JNIEnv* env, const char* utf))
718 JVMWrapper("JVM_FindPrimitiveClass");
719 oop mirror = NULL;
720 BasicType t = name2type(utf);
721 if (t != T_ILLEGAL && t != T_OBJECT && t != T_ARRAY) {
722 mirror = Universe::java_mirror(t);
723 }
724 if (mirror == NULL) {
725 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), (char*) utf);
726 } else {
727 return (jclass) JNIHandles::make_local(env, mirror);
728 }
729 JVM_END
732 JVM_ENTRY(void, JVM_ResolveClass(JNIEnv* env, jclass cls))
733 JVMWrapper("JVM_ResolveClass");
734 if (PrintJVMWarnings) warning("JVM_ResolveClass not implemented");
735 JVM_END
738 // Returns a class loaded by the bootstrap class loader; or null
739 // if not found. ClassNotFoundException is not thrown.
740 //
741 // Rationale behind JVM_FindClassFromBootLoader
742 // a> JVM_FindClassFromClassLoader was never exported in the export tables.
743 // b> because of (a) java.dll has a direct dependecy on the unexported
744 // private symbol "_JVM_FindClassFromClassLoader@20".
745 // c> the launcher cannot use the private symbol as it dynamically opens
746 // the entry point, so if something changes, the launcher will fail
747 // unexpectedly at runtime, it is safest for the launcher to dlopen a
748 // stable exported interface.
749 // d> re-exporting JVM_FindClassFromClassLoader as public, will cause its
750 // signature to change from _JVM_FindClassFromClassLoader@20 to
751 // JVM_FindClassFromClassLoader and will not be backward compatible
752 // with older JDKs.
753 // Thus a public/stable exported entry point is the right solution,
754 // public here means public in linker semantics, and is exported only
755 // to the JDK, and is not intended to be a public API.
757 JVM_ENTRY(jclass, JVM_FindClassFromBootLoader(JNIEnv* env,
758 const char* name))
759 JVMWrapper2("JVM_FindClassFromBootLoader %s", name);
761 // Java libraries should ensure that name is never null...
762 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
763 // It's impossible to create this class; the name cannot fit
764 // into the constant pool.
765 return NULL;
766 }
768 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
769 Klass* k = SystemDictionary::resolve_or_null(h_name, CHECK_NULL);
770 if (k == NULL) {
771 return NULL;
772 }
774 if (TraceClassResolution) {
775 trace_class_resolution(k);
776 }
777 return (jclass) JNIHandles::make_local(env, k->java_mirror());
778 JVM_END
780 JVM_ENTRY(jclass, JVM_FindClassFromClassLoader(JNIEnv* env, const char* name,
781 jboolean init, jobject loader,
782 jboolean throwError))
783 JVMWrapper3("JVM_FindClassFromClassLoader %s throw %s", name,
784 throwError ? "error" : "exception");
785 // Java libraries should ensure that name is never null...
786 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
787 // It's impossible to create this class; the name cannot fit
788 // into the constant pool.
789 if (throwError) {
790 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
791 } else {
792 THROW_MSG_0(vmSymbols::java_lang_ClassNotFoundException(), name);
793 }
794 }
795 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
796 Handle h_loader(THREAD, JNIHandles::resolve(loader));
797 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
798 Handle(), throwError, THREAD);
800 if (TraceClassResolution && result != NULL) {
801 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
802 }
803 return result;
804 JVM_END
807 JVM_ENTRY(jclass, JVM_FindClassFromClass(JNIEnv *env, const char *name,
808 jboolean init, jclass from))
809 JVMWrapper2("JVM_FindClassFromClass %s", name);
810 if (name == NULL || (int)strlen(name) > Symbol::max_length()) {
811 // It's impossible to create this class; the name cannot fit
812 // into the constant pool.
813 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
814 }
815 TempNewSymbol h_name = SymbolTable::new_symbol(name, CHECK_NULL);
816 oop from_class_oop = JNIHandles::resolve(from);
817 Klass* from_class = (from_class_oop == NULL)
818 ? (Klass*)NULL
819 : java_lang_Class::as_Klass(from_class_oop);
820 oop class_loader = NULL;
821 oop protection_domain = NULL;
822 if (from_class != NULL) {
823 class_loader = from_class->class_loader();
824 protection_domain = from_class->protection_domain();
825 }
826 Handle h_loader(THREAD, class_loader);
827 Handle h_prot (THREAD, protection_domain);
828 jclass result = find_class_from_class_loader(env, h_name, init, h_loader,
829 h_prot, true, thread);
831 if (TraceClassResolution && result != NULL) {
832 // this function is generally only used for class loading during verification.
833 ResourceMark rm;
834 oop from_mirror = JNIHandles::resolve_non_null(from);
835 Klass* from_class = java_lang_Class::as_Klass(from_mirror);
836 const char * from_name = from_class->external_name();
838 oop mirror = JNIHandles::resolve_non_null(result);
839 Klass* to_class = java_lang_Class::as_Klass(mirror);
840 const char * to = to_class->external_name();
841 tty->print("RESOLVE %s %s (verification)\n", from_name, to);
842 }
844 return result;
845 JVM_END
847 static void is_lock_held_by_thread(Handle loader, PerfCounter* counter, TRAPS) {
848 if (loader.is_null()) {
849 return;
850 }
852 // check whether the current caller thread holds the lock or not.
853 // If not, increment the corresponding counter
854 if (ObjectSynchronizer::query_lock_ownership((JavaThread*)THREAD, loader) !=
855 ObjectSynchronizer::owner_self) {
856 counter->inc();
857 }
858 }
860 // common code for JVM_DefineClass() and JVM_DefineClassWithSource()
861 // and JVM_DefineClassWithSourceCond()
862 static jclass jvm_define_class_common(JNIEnv *env, const char *name,
863 jobject loader, const jbyte *buf,
864 jsize len, jobject pd, const char *source,
865 jboolean verify, TRAPS) {
866 if (source == NULL) source = "__JVM_DefineClass__";
868 assert(THREAD->is_Java_thread(), "must be a JavaThread");
869 JavaThread* jt = (JavaThread*) THREAD;
871 PerfClassTraceTime vmtimer(ClassLoader::perf_define_appclass_time(),
872 ClassLoader::perf_define_appclass_selftime(),
873 ClassLoader::perf_define_appclasses(),
874 jt->get_thread_stat()->perf_recursion_counts_addr(),
875 jt->get_thread_stat()->perf_timers_addr(),
876 PerfClassTraceTime::DEFINE_CLASS);
878 if (UsePerfData) {
879 ClassLoader::perf_app_classfile_bytes_read()->inc(len);
880 }
882 // Since exceptions can be thrown, class initialization can take place
883 // if name is NULL no check for class name in .class stream has to be made.
884 TempNewSymbol class_name = NULL;
885 if (name != NULL) {
886 const int str_len = (int)strlen(name);
887 if (str_len > Symbol::max_length()) {
888 // It's impossible to create this class; the name cannot fit
889 // into the constant pool.
890 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
891 }
892 class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
893 }
895 ResourceMark rm(THREAD);
896 ClassFileStream st((u1*) buf, len, (char *)source);
897 Handle class_loader (THREAD, JNIHandles::resolve(loader));
898 if (UsePerfData) {
899 is_lock_held_by_thread(class_loader,
900 ClassLoader::sync_JVMDefineClassLockFreeCounter(),
901 THREAD);
902 }
903 Handle protection_domain (THREAD, JNIHandles::resolve(pd));
904 Klass* k = SystemDictionary::resolve_from_stream(class_name, class_loader,
905 protection_domain, &st,
906 verify != 0,
907 CHECK_NULL);
909 if (TraceClassResolution && k != NULL) {
910 trace_class_resolution(k);
911 }
913 return (jclass) JNIHandles::make_local(env, k->java_mirror());
914 }
917 JVM_ENTRY(jclass, JVM_DefineClass(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd))
918 JVMWrapper2("JVM_DefineClass %s", name);
920 return jvm_define_class_common(env, name, loader, buf, len, pd, NULL, true, THREAD);
921 JVM_END
924 JVM_ENTRY(jclass, JVM_DefineClassWithSource(JNIEnv *env, const char *name, jobject loader, const jbyte *buf, jsize len, jobject pd, const char *source))
925 JVMWrapper2("JVM_DefineClassWithSource %s", name);
927 return jvm_define_class_common(env, name, loader, buf, len, pd, source, true, THREAD);
928 JVM_END
930 JVM_ENTRY(jclass, JVM_DefineClassWithSourceCond(JNIEnv *env, const char *name,
931 jobject loader, const jbyte *buf,
932 jsize len, jobject pd,
933 const char *source, jboolean verify))
934 JVMWrapper2("JVM_DefineClassWithSourceCond %s", name);
936 return jvm_define_class_common(env, name, loader, buf, len, pd, source, verify, THREAD);
937 JVM_END
939 JVM_ENTRY(jclass, JVM_FindLoadedClass(JNIEnv *env, jobject loader, jstring name))
940 JVMWrapper("JVM_FindLoadedClass");
941 ResourceMark rm(THREAD);
943 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
944 Handle string = java_lang_String::internalize_classname(h_name, CHECK_NULL);
946 const char* str = java_lang_String::as_utf8_string(string());
947 // Sanity check, don't expect null
948 if (str == NULL) return NULL;
950 const int str_len = (int)strlen(str);
951 if (str_len > Symbol::max_length()) {
952 // It's impossible to create this class; the name cannot fit
953 // into the constant pool.
954 return NULL;
955 }
956 TempNewSymbol klass_name = SymbolTable::new_symbol(str, str_len, CHECK_NULL);
958 // Security Note:
959 // The Java level wrapper will perform the necessary security check allowing
960 // us to pass the NULL as the initiating class loader.
961 Handle h_loader(THREAD, JNIHandles::resolve(loader));
962 if (UsePerfData) {
963 is_lock_held_by_thread(h_loader,
964 ClassLoader::sync_JVMFindLoadedClassLockFreeCounter(),
965 THREAD);
966 }
968 Klass* k = SystemDictionary::find_instance_or_array_klass(klass_name,
969 h_loader,
970 Handle(),
971 CHECK_NULL);
973 return (k == NULL) ? NULL :
974 (jclass) JNIHandles::make_local(env, k->java_mirror());
975 JVM_END
978 // Reflection support //////////////////////////////////////////////////////////////////////////////
980 JVM_ENTRY(jstring, JVM_GetClassName(JNIEnv *env, jclass cls))
981 assert (cls != NULL, "illegal class");
982 JVMWrapper("JVM_GetClassName");
983 JvmtiVMObjectAllocEventCollector oam;
984 ResourceMark rm(THREAD);
985 const char* name;
986 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
987 name = type2name(java_lang_Class::primitive_type(JNIHandles::resolve(cls)));
988 } else {
989 // Consider caching interned string in Klass
990 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
991 assert(k->is_klass(), "just checking");
992 name = k->external_name();
993 }
994 oop result = StringTable::intern((char*) name, CHECK_NULL);
995 return (jstring) JNIHandles::make_local(env, result);
996 JVM_END
999 JVM_ENTRY(jobjectArray, JVM_GetClassInterfaces(JNIEnv *env, jclass cls))
1000 JVMWrapper("JVM_GetClassInterfaces");
1001 JvmtiVMObjectAllocEventCollector oam;
1002 oop mirror = JNIHandles::resolve_non_null(cls);
1004 // Special handling for primitive objects
1005 if (java_lang_Class::is_primitive(mirror)) {
1006 // Primitive objects does not have any interfaces
1007 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1008 return (jobjectArray) JNIHandles::make_local(env, r);
1009 }
1011 KlassHandle klass(thread, java_lang_Class::as_Klass(mirror));
1012 // Figure size of result array
1013 int size;
1014 if (klass->oop_is_instance()) {
1015 size = InstanceKlass::cast(klass())->local_interfaces()->length();
1016 } else {
1017 assert(klass->oop_is_objArray() || klass->oop_is_typeArray(), "Illegal mirror klass");
1018 size = 2;
1019 }
1021 // Allocate result array
1022 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), size, CHECK_NULL);
1023 objArrayHandle result (THREAD, r);
1024 // Fill in result
1025 if (klass->oop_is_instance()) {
1026 // Regular instance klass, fill in all local interfaces
1027 for (int index = 0; index < size; index++) {
1028 Klass* k = InstanceKlass::cast(klass())->local_interfaces()->at(index);
1029 result->obj_at_put(index, k->java_mirror());
1030 }
1031 } else {
1032 // All arrays implement java.lang.Cloneable and java.io.Serializable
1033 result->obj_at_put(0, SystemDictionary::Cloneable_klass()->java_mirror());
1034 result->obj_at_put(1, SystemDictionary::Serializable_klass()->java_mirror());
1035 }
1036 return (jobjectArray) JNIHandles::make_local(env, result());
1037 JVM_END
1040 JVM_ENTRY(jobject, JVM_GetClassLoader(JNIEnv *env, jclass cls))
1041 JVMWrapper("JVM_GetClassLoader");
1042 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1043 return NULL;
1044 }
1045 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1046 oop loader = k->class_loader();
1047 return JNIHandles::make_local(env, loader);
1048 JVM_END
1051 JVM_QUICK_ENTRY(jboolean, JVM_IsInterface(JNIEnv *env, jclass cls))
1052 JVMWrapper("JVM_IsInterface");
1053 oop mirror = JNIHandles::resolve_non_null(cls);
1054 if (java_lang_Class::is_primitive(mirror)) {
1055 return JNI_FALSE;
1056 }
1057 Klass* k = java_lang_Class::as_Klass(mirror);
1058 jboolean result = k->is_interface();
1059 assert(!result || k->oop_is_instance(),
1060 "all interfaces are instance types");
1061 // The compiler intrinsic for isInterface tests the
1062 // Klass::_access_flags bits in the same way.
1063 return result;
1064 JVM_END
1067 JVM_ENTRY(jobjectArray, JVM_GetClassSigners(JNIEnv *env, jclass cls))
1068 JVMWrapper("JVM_GetClassSigners");
1069 JvmtiVMObjectAllocEventCollector oam;
1070 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1071 // There are no signers for primitive types
1072 return NULL;
1073 }
1075 objArrayOop signers = java_lang_Class::signers(JNIHandles::resolve_non_null(cls));
1077 // If there are no signers set in the class, or if the class
1078 // is an array, return NULL.
1079 if (signers == NULL) return NULL;
1081 // copy of the signers array
1082 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1083 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1084 for (int index = 0; index < signers->length(); index++) {
1085 signers_copy->obj_at_put(index, signers->obj_at(index));
1086 }
1088 // return the copy
1089 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1090 JVM_END
1093 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1094 JVMWrapper("JVM_SetClassSigners");
1095 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1096 // This call is ignored for primitive types and arrays.
1097 // Signers are only set once, ClassLoader.java, and thus shouldn't
1098 // be called with an array. Only the bootstrap loader creates arrays.
1099 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1100 if (k->oop_is_instance()) {
1101 java_lang_Class::set_signers(k->java_mirror(), objArrayOop(JNIHandles::resolve(signers)));
1102 }
1103 }
1104 JVM_END
1107 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1108 JVMWrapper("JVM_GetProtectionDomain");
1109 if (JNIHandles::resolve(cls) == NULL) {
1110 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1111 }
1113 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1114 // Primitive types does not have a protection domain.
1115 return NULL;
1116 }
1118 oop pd = java_lang_Class::protection_domain(JNIHandles::resolve(cls));
1119 return (jobject) JNIHandles::make_local(env, pd);
1120 JVM_END
1123 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1124 // still defined in core libraries as of 1.5.
1125 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1126 JVMWrapper("JVM_SetProtectionDomain");
1127 if (JNIHandles::resolve(cls) == NULL) {
1128 THROW(vmSymbols::java_lang_NullPointerException());
1129 }
1130 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1131 // Call is ignored for primitive types
1132 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1134 // cls won't be an array, as this called only from ClassLoader.defineClass
1135 if (k->oop_is_instance()) {
1136 oop pd = JNIHandles::resolve(protection_domain);
1137 assert(pd == NULL || pd->is_oop(), "just checking");
1138 java_lang_Class::set_protection_domain(k->java_mirror(), pd);
1139 }
1140 }
1141 JVM_END
1144 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1145 JVMWrapper("JVM_DoPrivileged");
1147 if (action == NULL) {
1148 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1149 }
1151 // Stack allocated list of privileged stack elements
1152 PrivilegedElement pi;
1154 // Check that action object understands "Object run()"
1155 Handle object (THREAD, JNIHandles::resolve(action));
1157 // get run() method
1158 Method* m_oop = object->klass()->uncached_lookup_method(
1159 vmSymbols::run_method_name(),
1160 vmSymbols::void_object_signature());
1161 methodHandle m (THREAD, m_oop);
1162 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1163 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1164 }
1166 // Compute the frame initiating the do privileged operation and setup the privileged stack
1167 vframeStream vfst(thread);
1168 vfst.security_get_caller_frame(1);
1170 if (!vfst.at_end()) {
1171 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1172 thread->set_privileged_stack_top(&pi);
1173 }
1176 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1177 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1178 Handle pending_exception;
1179 JavaValue result(T_OBJECT);
1180 JavaCallArguments args(object);
1181 JavaCalls::call(&result, m, &args, THREAD);
1183 // done with action, remove ourselves from the list
1184 if (!vfst.at_end()) {
1185 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1186 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1187 }
1189 if (HAS_PENDING_EXCEPTION) {
1190 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1191 CLEAR_PENDING_EXCEPTION;
1193 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1194 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1195 // Throw a java.security.PrivilegedActionException(Exception e) exception
1196 JavaCallArguments args(pending_exception);
1197 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1198 vmSymbols::exception_void_signature(),
1199 &args);
1200 }
1201 }
1203 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1204 return JNIHandles::make_local(env, (oop) result.get_jobject());
1205 JVM_END
1208 // Returns the inherited_access_control_context field of the running thread.
1209 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1210 JVMWrapper("JVM_GetInheritedAccessControlContext");
1211 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1212 return JNIHandles::make_local(env, result);
1213 JVM_END
1215 class RegisterArrayForGC {
1216 private:
1217 JavaThread *_thread;
1218 public:
1219 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1220 _thread = thread;
1221 _thread->register_array_for_gc(array);
1222 }
1224 ~RegisterArrayForGC() {
1225 _thread->register_array_for_gc(NULL);
1226 }
1227 };
1230 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1231 JVMWrapper("JVM_GetStackAccessControlContext");
1232 if (!UsePrivilegedStack) return NULL;
1234 ResourceMark rm(THREAD);
1235 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1236 JvmtiVMObjectAllocEventCollector oam;
1238 // count the protection domains on the execution stack. We collapse
1239 // duplicate consecutive protection domains into a single one, as
1240 // well as stopping when we hit a privileged frame.
1242 // Use vframeStream to iterate through Java frames
1243 vframeStream vfst(thread);
1245 oop previous_protection_domain = NULL;
1246 Handle privileged_context(thread, NULL);
1247 bool is_privileged = false;
1248 oop protection_domain = NULL;
1250 for(; !vfst.at_end(); vfst.next()) {
1251 // get method of frame
1252 Method* method = vfst.method();
1253 intptr_t* frame_id = vfst.frame_id();
1255 // check the privileged frames to see if we have a match
1256 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1257 // this frame is privileged
1258 is_privileged = true;
1259 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1260 protection_domain = thread->privileged_stack_top()->protection_domain();
1261 } else {
1262 protection_domain = method->method_holder()->protection_domain();
1263 }
1265 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1266 local_array->push(protection_domain);
1267 previous_protection_domain = protection_domain;
1268 }
1270 if (is_privileged) break;
1271 }
1274 // either all the domains on the stack were system domains, or
1275 // we had a privileged system domain
1276 if (local_array->is_empty()) {
1277 if (is_privileged && privileged_context.is_null()) return NULL;
1279 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1280 return JNIHandles::make_local(env, result);
1281 }
1283 // the resource area must be registered in case of a gc
1284 RegisterArrayForGC ragc(thread, local_array);
1285 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1286 local_array->length(), CHECK_NULL);
1287 objArrayHandle h_context(thread, context);
1288 for (int index = 0; index < local_array->length(); index++) {
1289 h_context->obj_at_put(index, local_array->at(index));
1290 }
1292 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1294 return JNIHandles::make_local(env, result);
1295 JVM_END
1298 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1299 JVMWrapper("JVM_IsArrayClass");
1300 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1301 return (k != NULL) && k->oop_is_array() ? true : false;
1302 JVM_END
1305 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1306 JVMWrapper("JVM_IsPrimitiveClass");
1307 oop mirror = JNIHandles::resolve_non_null(cls);
1308 return (jboolean) java_lang_Class::is_primitive(mirror);
1309 JVM_END
1312 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1313 JVMWrapper("JVM_GetComponentType");
1314 oop mirror = JNIHandles::resolve_non_null(cls);
1315 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1316 return (jclass) JNIHandles::make_local(env, result);
1317 JVM_END
1320 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1321 JVMWrapper("JVM_GetClassModifiers");
1322 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1323 // Primitive type
1324 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1325 }
1327 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1328 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1329 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1330 return k->modifier_flags();
1331 JVM_END
1334 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1336 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1337 JvmtiVMObjectAllocEventCollector oam;
1338 // ofClass is a reference to a java_lang_Class object. The mirror object
1339 // of an InstanceKlass
1341 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1342 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1343 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1344 return (jobjectArray)JNIHandles::make_local(env, result);
1345 }
1347 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1348 InnerClassesIterator iter(k);
1350 if (iter.length() == 0) {
1351 // Neither an inner nor outer class
1352 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1353 return (jobjectArray)JNIHandles::make_local(env, result);
1354 }
1356 // find inner class info
1357 constantPoolHandle cp(thread, k->constants());
1358 int length = iter.length();
1360 // Allocate temp. result array
1361 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1362 objArrayHandle result (THREAD, r);
1363 int members = 0;
1365 for (; !iter.done(); iter.next()) {
1366 int ioff = iter.inner_class_info_index();
1367 int ooff = iter.outer_class_info_index();
1369 if (ioff != 0 && ooff != 0) {
1370 // Check to see if the name matches the class we're looking for
1371 // before attempting to find the class.
1372 if (cp->klass_name_at_matches(k, ooff)) {
1373 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1374 if (outer_klass == k()) {
1375 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1376 instanceKlassHandle inner_klass (THREAD, ik);
1378 // Throws an exception if outer klass has not declared k as
1379 // an inner klass
1380 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1382 result->obj_at_put(members, inner_klass->java_mirror());
1383 members++;
1384 }
1385 }
1386 }
1387 }
1389 if (members != length) {
1390 // Return array of right length
1391 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1392 for(int i = 0; i < members; i++) {
1393 res->obj_at_put(i, result->obj_at(i));
1394 }
1395 return (jobjectArray)JNIHandles::make_local(env, res);
1396 }
1398 return (jobjectArray)JNIHandles::make_local(env, result());
1399 JVM_END
1402 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1403 {
1404 // ofClass is a reference to a java_lang_Class object.
1405 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1406 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1407 return NULL;
1408 }
1410 bool inner_is_member = false;
1411 Klass* outer_klass
1412 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1413 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1414 if (outer_klass == NULL) return NULL; // already a top-level class
1415 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1416 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1417 }
1418 JVM_END
1420 // should be in InstanceKlass.cpp, but is here for historical reasons
1421 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1422 bool* inner_is_member,
1423 TRAPS) {
1424 Thread* thread = THREAD;
1425 InnerClassesIterator iter(k);
1426 if (iter.length() == 0) {
1427 // No inner class info => no declaring class
1428 return NULL;
1429 }
1431 constantPoolHandle i_cp(thread, k->constants());
1433 bool found = false;
1434 Klass* ok;
1435 instanceKlassHandle outer_klass;
1436 *inner_is_member = false;
1438 // Find inner_klass attribute
1439 for (; !iter.done() && !found; iter.next()) {
1440 int ioff = iter.inner_class_info_index();
1441 int ooff = iter.outer_class_info_index();
1442 int noff = iter.inner_name_index();
1443 if (ioff != 0) {
1444 // Check to see if the name matches the class we're looking for
1445 // before attempting to find the class.
1446 if (i_cp->klass_name_at_matches(k, ioff)) {
1447 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1448 found = (k() == inner_klass);
1449 if (found && ooff != 0) {
1450 ok = i_cp->klass_at(ooff, CHECK_NULL);
1451 outer_klass = instanceKlassHandle(thread, ok);
1452 *inner_is_member = true;
1453 }
1454 }
1455 }
1456 }
1458 if (found && outer_klass.is_null()) {
1459 // It may be anonymous; try for that.
1460 int encl_method_class_idx = k->enclosing_method_class_index();
1461 if (encl_method_class_idx != 0) {
1462 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1463 outer_klass = instanceKlassHandle(thread, ok);
1464 *inner_is_member = false;
1465 }
1466 }
1468 // If no inner class attribute found for this class.
1469 if (outer_klass.is_null()) return NULL;
1471 // Throws an exception if outer klass has not declared k as an inner klass
1472 // We need evidence that each klass knows about the other, or else
1473 // the system could allow a spoof of an inner class to gain access rights.
1474 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1475 return outer_klass();
1476 }
1478 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1479 assert (cls != NULL, "illegal class");
1480 JVMWrapper("JVM_GetClassSignature");
1481 JvmtiVMObjectAllocEventCollector oam;
1482 ResourceMark rm(THREAD);
1483 // Return null for arrays and primatives
1484 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1485 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1486 if (k->oop_is_instance()) {
1487 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1488 if (sym == NULL) return NULL;
1489 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1490 return (jstring) JNIHandles::make_local(env, str());
1491 }
1492 }
1493 return NULL;
1494 JVM_END
1497 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1498 assert (cls != NULL, "illegal class");
1499 JVMWrapper("JVM_GetClassAnnotations");
1501 // Return null for arrays and primitives
1502 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1503 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1504 if (k->oop_is_instance()) {
1505 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1506 return (jbyteArray) JNIHandles::make_local(env, a);
1507 }
1508 }
1509 return NULL;
1510 JVM_END
1513 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1514 // some of this code was adapted from from jni_FromReflectedField
1516 oop reflected = JNIHandles::resolve_non_null(field);
1517 oop mirror = java_lang_reflect_Field::clazz(reflected);
1518 Klass* k = java_lang_Class::as_Klass(mirror);
1519 int slot = java_lang_reflect_Field::slot(reflected);
1520 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1522 KlassHandle kh(THREAD, k);
1523 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1525 if (modifiers & JVM_ACC_STATIC) {
1526 // for static fields we only look in the current class
1527 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1528 assert(false, "cannot find static field");
1529 return false;
1530 }
1531 } else {
1532 // for instance fields we start with the current class and work
1533 // our way up through the superclass chain
1534 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1535 assert(false, "cannot find instance field");
1536 return false;
1537 }
1538 }
1539 return true;
1540 }
1542 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1543 // field is a handle to a java.lang.reflect.Field object
1544 assert(field != NULL, "illegal field");
1545 JVMWrapper("JVM_GetFieldAnnotations");
1547 fieldDescriptor fd;
1548 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1549 if (!gotFd) {
1550 return NULL;
1551 }
1553 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1554 JVM_END
1557 static Method* jvm_get_method_common(jobject method) {
1558 // some of this code was adapted from from jni_FromReflectedMethod
1560 oop reflected = JNIHandles::resolve_non_null(method);
1561 oop mirror = NULL;
1562 int slot = 0;
1564 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1565 mirror = java_lang_reflect_Constructor::clazz(reflected);
1566 slot = java_lang_reflect_Constructor::slot(reflected);
1567 } else {
1568 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1569 "wrong type");
1570 mirror = java_lang_reflect_Method::clazz(reflected);
1571 slot = java_lang_reflect_Method::slot(reflected);
1572 }
1573 Klass* k = java_lang_Class::as_Klass(mirror);
1575 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1576 assert(m != NULL, "cannot find method");
1577 return m; // caller has to deal with NULL in product mode
1578 }
1581 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1582 JVMWrapper("JVM_GetMethodAnnotations");
1584 // method is a handle to a java.lang.reflect.Method object
1585 Method* m = jvm_get_method_common(method);
1586 if (m == NULL) {
1587 return NULL;
1588 }
1590 return (jbyteArray) JNIHandles::make_local(env,
1591 Annotations::make_java_array(m->annotations(), THREAD));
1592 JVM_END
1595 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1596 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1598 // method is a handle to a java.lang.reflect.Method object
1599 Method* m = jvm_get_method_common(method);
1600 if (m == NULL) {
1601 return NULL;
1602 }
1604 return (jbyteArray) JNIHandles::make_local(env,
1605 Annotations::make_java_array(m->annotation_default(), THREAD));
1606 JVM_END
1609 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1610 JVMWrapper("JVM_GetMethodParameterAnnotations");
1612 // method is a handle to a java.lang.reflect.Method object
1613 Method* m = jvm_get_method_common(method);
1614 if (m == NULL) {
1615 return NULL;
1616 }
1618 return (jbyteArray) JNIHandles::make_local(env,
1619 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1620 JVM_END
1622 /* Type use annotations support (JDK 1.8) */
1624 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1625 assert (cls != NULL, "illegal class");
1626 JVMWrapper("JVM_GetClassTypeAnnotations");
1627 ResourceMark rm(THREAD);
1628 // Return null for arrays and primitives
1629 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1630 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1631 if (k->oop_is_instance()) {
1632 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1633 if (type_annotations != NULL) {
1634 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1635 return (jbyteArray) JNIHandles::make_local(env, a);
1636 }
1637 }
1638 }
1639 return NULL;
1640 JVM_END
1642 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1643 assert (method != NULL, "illegal method");
1644 JVMWrapper("JVM_GetMethodTypeAnnotations");
1646 // method is a handle to a java.lang.reflect.Method object
1647 Method* m = jvm_get_method_common(method);
1648 if (m == NULL) {
1649 return NULL;
1650 }
1652 AnnotationArray* type_annotations = m->type_annotations();
1653 if (type_annotations != NULL) {
1654 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1655 return (jbyteArray) JNIHandles::make_local(env, a);
1656 }
1658 return NULL;
1659 JVM_END
1661 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1662 assert (field != NULL, "illegal field");
1663 JVMWrapper("JVM_GetFieldTypeAnnotations");
1665 fieldDescriptor fd;
1666 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1667 if (!gotFd) {
1668 return NULL;
1669 }
1671 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1672 JVM_END
1674 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1675 if (!cp->is_within_bounds(index)) {
1676 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1677 }
1678 }
1680 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1681 {
1682 JVMWrapper("JVM_GetMethodParameters");
1683 // method is a handle to a java.lang.reflect.Method object
1684 Method* method_ptr = jvm_get_method_common(method);
1685 methodHandle mh (THREAD, method_ptr);
1686 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1687 const int num_params = mh->method_parameters_length();
1689 if (0 != num_params) {
1690 // make sure all the symbols are properly formatted
1691 for (int i = 0; i < num_params; i++) {
1692 MethodParametersElement* params = mh->method_parameters_start();
1693 int index = params[i].name_cp_index;
1694 bounds_check(mh->constants(), index, CHECK_NULL);
1696 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1697 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1698 "Wrong type at constant pool index");
1699 }
1701 }
1703 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1704 objArrayHandle result (THREAD, result_oop);
1706 for (int i = 0; i < num_params; i++) {
1707 MethodParametersElement* params = mh->method_parameters_start();
1708 // For a 0 index, give a NULL symbol
1709 Symbol* sym = 0 != params[i].name_cp_index ?
1710 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1711 int flags = params[i].flags;
1712 oop param = Reflection::new_parameter(reflected_method, i, sym,
1713 flags, CHECK_NULL);
1714 result->obj_at_put(i, param);
1715 }
1716 return (jobjectArray)JNIHandles::make_local(env, result());
1717 } else {
1718 return (jobjectArray)NULL;
1719 }
1720 }
1721 JVM_END
1723 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1725 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1726 {
1727 JVMWrapper("JVM_GetClassDeclaredFields");
1728 JvmtiVMObjectAllocEventCollector oam;
1730 // Exclude primitive types and array types
1731 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1732 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1733 // Return empty array
1734 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1735 return (jobjectArray) JNIHandles::make_local(env, res);
1736 }
1738 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1739 constantPoolHandle cp(THREAD, k->constants());
1741 // Ensure class is linked
1742 k->link_class(CHECK_NULL);
1744 // 4496456 We need to filter out java.lang.Throwable.backtrace
1745 bool skip_backtrace = false;
1747 // Allocate result
1748 int num_fields;
1750 if (publicOnly) {
1751 num_fields = 0;
1752 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1753 if (fs.access_flags().is_public()) ++num_fields;
1754 }
1755 } else {
1756 num_fields = k->java_fields_count();
1758 if (k() == SystemDictionary::Throwable_klass()) {
1759 num_fields--;
1760 skip_backtrace = true;
1761 }
1762 }
1764 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1765 objArrayHandle result (THREAD, r);
1767 int out_idx = 0;
1768 fieldDescriptor fd;
1769 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1770 if (skip_backtrace) {
1771 // 4496456 skip java.lang.Throwable.backtrace
1772 int offset = fs.offset();
1773 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1774 }
1776 if (!publicOnly || fs.access_flags().is_public()) {
1777 fd.initialize(k(), fs.index());
1778 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1779 result->obj_at_put(out_idx, field);
1780 ++out_idx;
1781 }
1782 }
1783 assert(out_idx == num_fields, "just checking");
1784 return (jobjectArray) JNIHandles::make_local(env, result());
1785 }
1786 JVM_END
1788 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1789 {
1790 JVMWrapper("JVM_GetClassDeclaredMethods");
1791 JvmtiVMObjectAllocEventCollector oam;
1793 // Exclude primitive types and array types
1794 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1795 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1796 // Return empty array
1797 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1798 return (jobjectArray) JNIHandles::make_local(env, res);
1799 }
1801 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1803 // Ensure class is linked
1804 k->link_class(CHECK_NULL);
1806 Array<Method*>* methods = k->methods();
1807 int methods_length = methods->length();
1808 int num_methods = 0;
1810 int i;
1811 for (i = 0; i < methods_length; i++) {
1812 methodHandle method(THREAD, methods->at(i));
1813 if (!method->is_initializer() && !method->is_overpass()) {
1814 if (!publicOnly || method->is_public()) {
1815 ++num_methods;
1816 }
1817 }
1818 }
1820 // Allocate result
1821 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1822 objArrayHandle result (THREAD, r);
1824 int out_idx = 0;
1825 for (i = 0; i < methods_length; i++) {
1826 methodHandle method(THREAD, methods->at(i));
1827 if (!method->is_initializer() && !method->is_overpass()) {
1828 if (!publicOnly || method->is_public()) {
1829 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1830 result->obj_at_put(out_idx, m);
1831 ++out_idx;
1832 }
1833 }
1834 }
1835 assert(out_idx == num_methods, "just checking");
1836 return (jobjectArray) JNIHandles::make_local(env, result());
1837 }
1838 JVM_END
1840 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1841 {
1842 JVMWrapper("JVM_GetClassDeclaredConstructors");
1843 JvmtiVMObjectAllocEventCollector oam;
1845 // Exclude primitive types and array types
1846 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1847 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1848 // Return empty array
1849 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1850 return (jobjectArray) JNIHandles::make_local(env, res);
1851 }
1853 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1855 // Ensure class is linked
1856 k->link_class(CHECK_NULL);
1858 Array<Method*>* methods = k->methods();
1859 int methods_length = methods->length();
1860 int num_constructors = 0;
1862 int i;
1863 for (i = 0; i < methods_length; i++) {
1864 methodHandle method(THREAD, methods->at(i));
1865 if (method->is_initializer() && !method->is_static()) {
1866 if (!publicOnly || method->is_public()) {
1867 ++num_constructors;
1868 }
1869 }
1870 }
1872 // Allocate result
1873 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1874 objArrayHandle result(THREAD, r);
1876 int out_idx = 0;
1877 for (i = 0; i < methods_length; i++) {
1878 methodHandle method(THREAD, methods->at(i));
1879 if (method->is_initializer() && !method->is_static()) {
1880 if (!publicOnly || method->is_public()) {
1881 oop m = Reflection::new_constructor(method, CHECK_NULL);
1882 result->obj_at_put(out_idx, m);
1883 ++out_idx;
1884 }
1885 }
1886 }
1887 assert(out_idx == num_constructors, "just checking");
1888 return (jobjectArray) JNIHandles::make_local(env, result());
1889 }
1890 JVM_END
1892 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1893 {
1894 JVMWrapper("JVM_GetClassAccessFlags");
1895 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1896 // Primitive type
1897 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1898 }
1900 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1901 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1902 }
1903 JVM_END
1906 // Constant pool access //////////////////////////////////////////////////////////
1908 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1909 {
1910 JVMWrapper("JVM_GetClassConstantPool");
1911 JvmtiVMObjectAllocEventCollector oam;
1913 // Return null for primitives and arrays
1914 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1915 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1916 if (k->oop_is_instance()) {
1917 instanceKlassHandle k_h(THREAD, k);
1918 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1919 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1920 return JNIHandles::make_local(jcp());
1921 }
1922 }
1923 return NULL;
1924 }
1925 JVM_END
1928 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1929 {
1930 JVMWrapper("JVM_ConstantPoolGetSize");
1931 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1932 return cp->length();
1933 }
1934 JVM_END
1937 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1938 {
1939 JVMWrapper("JVM_ConstantPoolGetClassAt");
1940 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1941 bounds_check(cp, index, CHECK_NULL);
1942 constantTag tag = cp->tag_at(index);
1943 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1944 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1945 }
1946 Klass* k = cp->klass_at(index, CHECK_NULL);
1947 return (jclass) JNIHandles::make_local(k->java_mirror());
1948 }
1949 JVM_END
1951 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1952 {
1953 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1954 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1955 bounds_check(cp, index, CHECK_NULL);
1956 constantTag tag = cp->tag_at(index);
1957 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1958 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1959 }
1960 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1961 if (k == NULL) return NULL;
1962 return (jclass) JNIHandles::make_local(k->java_mirror());
1963 }
1964 JVM_END
1966 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1967 constantTag tag = cp->tag_at(index);
1968 if (!tag.is_method() && !tag.is_interface_method()) {
1969 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1970 }
1971 int klass_ref = cp->uncached_klass_ref_index_at(index);
1972 Klass* k_o;
1973 if (force_resolution) {
1974 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1975 } else {
1976 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1977 if (k_o == NULL) return NULL;
1978 }
1979 instanceKlassHandle k(THREAD, k_o);
1980 Symbol* name = cp->uncached_name_ref_at(index);
1981 Symbol* sig = cp->uncached_signature_ref_at(index);
1982 methodHandle m (THREAD, k->find_method(name, sig));
1983 if (m.is_null()) {
1984 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1985 }
1986 oop method;
1987 if (!m->is_initializer() || m->is_static()) {
1988 method = Reflection::new_method(m, true, true, CHECK_NULL);
1989 } else {
1990 method = Reflection::new_constructor(m, CHECK_NULL);
1991 }
1992 return JNIHandles::make_local(method);
1993 }
1995 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1996 {
1997 JVMWrapper("JVM_ConstantPoolGetMethodAt");
1998 JvmtiVMObjectAllocEventCollector oam;
1999 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2000 bounds_check(cp, index, CHECK_NULL);
2001 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2002 return res;
2003 }
2004 JVM_END
2006 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2007 {
2008 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2009 JvmtiVMObjectAllocEventCollector oam;
2010 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2011 bounds_check(cp, index, CHECK_NULL);
2012 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2013 return res;
2014 }
2015 JVM_END
2017 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2018 constantTag tag = cp->tag_at(index);
2019 if (!tag.is_field()) {
2020 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2021 }
2022 int klass_ref = cp->uncached_klass_ref_index_at(index);
2023 Klass* k_o;
2024 if (force_resolution) {
2025 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2026 } else {
2027 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2028 if (k_o == NULL) return NULL;
2029 }
2030 instanceKlassHandle k(THREAD, k_o);
2031 Symbol* name = cp->uncached_name_ref_at(index);
2032 Symbol* sig = cp->uncached_signature_ref_at(index);
2033 fieldDescriptor fd;
2034 Klass* target_klass = k->find_field(name, sig, &fd);
2035 if (target_klass == NULL) {
2036 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2037 }
2038 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2039 return JNIHandles::make_local(field);
2040 }
2042 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2043 {
2044 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2045 JvmtiVMObjectAllocEventCollector oam;
2046 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2047 bounds_check(cp, index, CHECK_NULL);
2048 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2049 return res;
2050 }
2051 JVM_END
2053 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2054 {
2055 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2056 JvmtiVMObjectAllocEventCollector oam;
2057 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2058 bounds_check(cp, index, CHECK_NULL);
2059 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2060 return res;
2061 }
2062 JVM_END
2064 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2065 {
2066 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2067 JvmtiVMObjectAllocEventCollector oam;
2068 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2069 bounds_check(cp, index, CHECK_NULL);
2070 constantTag tag = cp->tag_at(index);
2071 if (!tag.is_field_or_method()) {
2072 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2073 }
2074 int klass_ref = cp->uncached_klass_ref_index_at(index);
2075 Symbol* klass_name = cp->klass_name_at(klass_ref);
2076 Symbol* member_name = cp->uncached_name_ref_at(index);
2077 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2078 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2079 objArrayHandle dest(THREAD, dest_o);
2080 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2081 dest->obj_at_put(0, str());
2082 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2083 dest->obj_at_put(1, str());
2084 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2085 dest->obj_at_put(2, str());
2086 return (jobjectArray) JNIHandles::make_local(dest());
2087 }
2088 JVM_END
2090 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2091 {
2092 JVMWrapper("JVM_ConstantPoolGetIntAt");
2093 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2094 bounds_check(cp, index, CHECK_0);
2095 constantTag tag = cp->tag_at(index);
2096 if (!tag.is_int()) {
2097 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2098 }
2099 return cp->int_at(index);
2100 }
2101 JVM_END
2103 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2104 {
2105 JVMWrapper("JVM_ConstantPoolGetLongAt");
2106 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2107 bounds_check(cp, index, CHECK_(0L));
2108 constantTag tag = cp->tag_at(index);
2109 if (!tag.is_long()) {
2110 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2111 }
2112 return cp->long_at(index);
2113 }
2114 JVM_END
2116 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2117 {
2118 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2119 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2120 bounds_check(cp, index, CHECK_(0.0f));
2121 constantTag tag = cp->tag_at(index);
2122 if (!tag.is_float()) {
2123 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2124 }
2125 return cp->float_at(index);
2126 }
2127 JVM_END
2129 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2130 {
2131 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2132 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2133 bounds_check(cp, index, CHECK_(0.0));
2134 constantTag tag = cp->tag_at(index);
2135 if (!tag.is_double()) {
2136 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2137 }
2138 return cp->double_at(index);
2139 }
2140 JVM_END
2142 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2143 {
2144 JVMWrapper("JVM_ConstantPoolGetStringAt");
2145 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2146 bounds_check(cp, index, CHECK_NULL);
2147 constantTag tag = cp->tag_at(index);
2148 if (!tag.is_string()) {
2149 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2150 }
2151 oop str = cp->string_at(index, CHECK_NULL);
2152 return (jstring) JNIHandles::make_local(str);
2153 }
2154 JVM_END
2156 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2157 {
2158 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2159 JvmtiVMObjectAllocEventCollector oam;
2160 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2161 bounds_check(cp, index, CHECK_NULL);
2162 constantTag tag = cp->tag_at(index);
2163 if (!tag.is_symbol()) {
2164 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2165 }
2166 Symbol* sym = cp->symbol_at(index);
2167 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2168 return (jstring) JNIHandles::make_local(str());
2169 }
2170 JVM_END
2173 // Assertion support. //////////////////////////////////////////////////////////
2175 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2176 JVMWrapper("JVM_DesiredAssertionStatus");
2177 assert(cls != NULL, "bad class");
2179 oop r = JNIHandles::resolve(cls);
2180 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2181 if (java_lang_Class::is_primitive(r)) return false;
2183 Klass* k = java_lang_Class::as_Klass(r);
2184 assert(k->oop_is_instance(), "must be an instance klass");
2185 if (! k->oop_is_instance()) return false;
2187 ResourceMark rm(THREAD);
2188 const char* name = k->name()->as_C_string();
2189 bool system_class = k->class_loader() == NULL;
2190 return JavaAssertions::enabled(name, system_class);
2192 JVM_END
2195 // Return a new AssertionStatusDirectives object with the fields filled in with
2196 // command-line assertion arguments (i.e., -ea, -da).
2197 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2198 JVMWrapper("JVM_AssertionStatusDirectives");
2199 JvmtiVMObjectAllocEventCollector oam;
2200 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2201 return JNIHandles::make_local(env, asd);
2202 JVM_END
2204 // Verification ////////////////////////////////////////////////////////////////////////////////
2206 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2208 // RedefineClasses support: bug 6214132 caused verification to fail.
2209 // All functions from this section should call the jvmtiThreadSate function:
2210 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2211 // The function returns a Klass* of the _scratch_class if the verifier
2212 // was invoked in the middle of the class redefinition.
2213 // Otherwise it returns its argument value which is the _the_class Klass*.
2214 // Please, refer to the description in the jvmtiThreadSate.hpp.
2216 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2217 JVMWrapper("JVM_GetClassNameUTF");
2218 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2219 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2220 return k->name()->as_utf8();
2221 JVM_END
2224 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2225 JVMWrapper("JVM_GetClassCPTypes");
2226 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2227 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2228 // types will have length zero if this is not an InstanceKlass
2229 // (length is determined by call to JVM_GetClassCPEntriesCount)
2230 if (k->oop_is_instance()) {
2231 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2232 for (int index = cp->length() - 1; index >= 0; index--) {
2233 constantTag tag = cp->tag_at(index);
2234 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2235 }
2236 }
2237 JVM_END
2240 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2241 JVMWrapper("JVM_GetClassCPEntriesCount");
2242 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2243 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2244 if (!k->oop_is_instance())
2245 return 0;
2246 return InstanceKlass::cast(k)->constants()->length();
2247 JVM_END
2250 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2251 JVMWrapper("JVM_GetClassFieldsCount");
2252 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2253 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2254 if (!k->oop_is_instance())
2255 return 0;
2256 return InstanceKlass::cast(k)->java_fields_count();
2257 JVM_END
2260 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2261 JVMWrapper("JVM_GetClassMethodsCount");
2262 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2263 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2264 if (!k->oop_is_instance())
2265 return 0;
2266 return InstanceKlass::cast(k)->methods()->length();
2267 JVM_END
2270 // The following methods, used for the verifier, are never called with
2271 // array klasses, so a direct cast to InstanceKlass is safe.
2272 // Typically, these methods are called in a loop with bounds determined
2273 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2274 // zero for arrays.
2275 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2276 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2277 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2278 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2279 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2280 int length = method->checked_exceptions_length();
2281 if (length > 0) {
2282 CheckedExceptionElement* table= method->checked_exceptions_start();
2283 for (int i = 0; i < length; i++) {
2284 exceptions[i] = table[i].class_cp_index;
2285 }
2286 }
2287 JVM_END
2290 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2291 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2292 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2293 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2294 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2295 return method->checked_exceptions_length();
2296 JVM_END
2299 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2300 JVMWrapper("JVM_GetMethodIxByteCode");
2301 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2302 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2303 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2304 memcpy(code, method->code_base(), method->code_size());
2305 JVM_END
2308 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2309 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2310 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2311 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2312 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2313 return method->code_size();
2314 JVM_END
2317 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2318 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2319 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2320 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2321 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2322 ExceptionTable extable(method);
2323 entry->start_pc = extable.start_pc(entry_index);
2324 entry->end_pc = extable.end_pc(entry_index);
2325 entry->handler_pc = extable.handler_pc(entry_index);
2326 entry->catchType = extable.catch_type_index(entry_index);
2327 JVM_END
2330 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2331 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2332 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2333 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2334 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2335 return method->exception_table_length();
2336 JVM_END
2339 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2340 JVMWrapper("JVM_GetMethodIxModifiers");
2341 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2342 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2343 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2344 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2345 JVM_END
2348 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2349 JVMWrapper("JVM_GetFieldIxModifiers");
2350 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2351 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2352 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2353 JVM_END
2356 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2357 JVMWrapper("JVM_GetMethodIxLocalsCount");
2358 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2359 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2360 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2361 return method->max_locals();
2362 JVM_END
2365 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2366 JVMWrapper("JVM_GetMethodIxArgsSize");
2367 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2368 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2369 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2370 return method->size_of_parameters();
2371 JVM_END
2374 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2375 JVMWrapper("JVM_GetMethodIxMaxStack");
2376 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2377 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2378 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2379 return method->verifier_max_stack();
2380 JVM_END
2383 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2384 JVMWrapper("JVM_IsConstructorIx");
2385 ResourceMark rm(THREAD);
2386 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2387 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2388 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2389 return method->name() == vmSymbols::object_initializer_name();
2390 JVM_END
2393 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2394 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2395 ResourceMark rm(THREAD);
2396 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2397 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2398 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2399 return method->is_overpass();
2400 JVM_END
2402 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2403 JVMWrapper("JVM_GetMethodIxIxUTF");
2404 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2405 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2406 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2407 return method->name()->as_utf8();
2408 JVM_END
2411 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2412 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2413 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2414 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2415 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2416 return method->signature()->as_utf8();
2417 JVM_END
2419 /**
2420 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2421 * read entries in the constant pool. Since the old verifier always
2422 * works on a copy of the code, it will not see any rewriting that
2423 * may possibly occur in the middle of verification. So it is important
2424 * that nothing it calls tries to use the cpCache instead of the raw
2425 * constant pool, so we must use cp->uncached_x methods when appropriate.
2426 */
2427 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2428 JVMWrapper("JVM_GetCPFieldNameUTF");
2429 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2430 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2431 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2432 switch (cp->tag_at(cp_index).value()) {
2433 case JVM_CONSTANT_Fieldref:
2434 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2435 default:
2436 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2437 }
2438 ShouldNotReachHere();
2439 return NULL;
2440 JVM_END
2443 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2444 JVMWrapper("JVM_GetCPMethodNameUTF");
2445 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2446 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2447 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2448 switch (cp->tag_at(cp_index).value()) {
2449 case JVM_CONSTANT_InterfaceMethodref:
2450 case JVM_CONSTANT_Methodref:
2451 case JVM_CONSTANT_NameAndType: // for invokedynamic
2452 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2453 default:
2454 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2455 }
2456 ShouldNotReachHere();
2457 return NULL;
2458 JVM_END
2461 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2462 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2463 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2464 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2465 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2466 switch (cp->tag_at(cp_index).value()) {
2467 case JVM_CONSTANT_InterfaceMethodref:
2468 case JVM_CONSTANT_Methodref:
2469 case JVM_CONSTANT_NameAndType: // for invokedynamic
2470 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2471 default:
2472 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2473 }
2474 ShouldNotReachHere();
2475 return NULL;
2476 JVM_END
2479 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2480 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2481 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2482 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2483 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2484 switch (cp->tag_at(cp_index).value()) {
2485 case JVM_CONSTANT_Fieldref:
2486 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2487 default:
2488 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2489 }
2490 ShouldNotReachHere();
2491 return NULL;
2492 JVM_END
2495 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2496 JVMWrapper("JVM_GetCPClassNameUTF");
2497 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2498 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2499 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2500 Symbol* classname = cp->klass_name_at(cp_index);
2501 return classname->as_utf8();
2502 JVM_END
2505 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2506 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2508 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2509 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2510 switch (cp->tag_at(cp_index).value()) {
2511 case JVM_CONSTANT_Fieldref: {
2512 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2513 Symbol* classname = cp->klass_name_at(class_index);
2514 return classname->as_utf8();
2515 }
2516 default:
2517 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2518 }
2519 ShouldNotReachHere();
2520 return NULL;
2521 JVM_END
2524 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2525 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2526 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2527 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2528 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2529 switch (cp->tag_at(cp_index).value()) {
2530 case JVM_CONSTANT_Methodref:
2531 case JVM_CONSTANT_InterfaceMethodref: {
2532 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2533 Symbol* classname = cp->klass_name_at(class_index);
2534 return classname->as_utf8();
2535 }
2536 default:
2537 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2538 }
2539 ShouldNotReachHere();
2540 return NULL;
2541 JVM_END
2544 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2545 JVMWrapper("JVM_GetCPFieldModifiers");
2546 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2547 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2548 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2549 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2550 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2551 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2552 switch (cp->tag_at(cp_index).value()) {
2553 case JVM_CONSTANT_Fieldref: {
2554 Symbol* name = cp->uncached_name_ref_at(cp_index);
2555 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2556 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2557 if (fs.name() == name && fs.signature() == signature) {
2558 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2559 }
2560 }
2561 return -1;
2562 }
2563 default:
2564 fatal("JVM_GetCPFieldModifiers: illegal constant");
2565 }
2566 ShouldNotReachHere();
2567 return 0;
2568 JVM_END
2571 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2572 JVMWrapper("JVM_GetCPMethodModifiers");
2573 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2574 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2575 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2576 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2577 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2578 switch (cp->tag_at(cp_index).value()) {
2579 case JVM_CONSTANT_Methodref:
2580 case JVM_CONSTANT_InterfaceMethodref: {
2581 Symbol* name = cp->uncached_name_ref_at(cp_index);
2582 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2583 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2584 int methods_count = methods->length();
2585 for (int i = 0; i < methods_count; i++) {
2586 Method* method = methods->at(i);
2587 if (method->name() == name && method->signature() == signature) {
2588 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2589 }
2590 }
2591 return -1;
2592 }
2593 default:
2594 fatal("JVM_GetCPMethodModifiers: illegal constant");
2595 }
2596 ShouldNotReachHere();
2597 return 0;
2598 JVM_END
2601 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2603 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2604 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2605 JVM_END
2608 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2609 JVMWrapper("JVM_IsSameClassPackage");
2610 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2611 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2612 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2613 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2614 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2615 JVM_END
2618 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2620 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2621 JVMWrapper2("JVM_Open (%s)", fname);
2623 //%note jvm_r6
2624 int result = os::open(fname, flags, mode);
2625 if (result >= 0) {
2626 return result;
2627 } else {
2628 switch(errno) {
2629 case EEXIST:
2630 return JVM_EEXIST;
2631 default:
2632 return -1;
2633 }
2634 }
2635 JVM_END
2638 JVM_LEAF(jint, JVM_Close(jint fd))
2639 JVMWrapper2("JVM_Close (0x%x)", fd);
2640 //%note jvm_r6
2641 return os::close(fd);
2642 JVM_END
2645 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2646 JVMWrapper2("JVM_Read (0x%x)", fd);
2648 //%note jvm_r6
2649 return (jint)os::restartable_read(fd, buf, nbytes);
2650 JVM_END
2653 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2654 JVMWrapper2("JVM_Write (0x%x)", fd);
2656 //%note jvm_r6
2657 return (jint)os::write(fd, buf, nbytes);
2658 JVM_END
2661 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2662 JVMWrapper2("JVM_Available (0x%x)", fd);
2663 //%note jvm_r6
2664 return os::available(fd, pbytes);
2665 JVM_END
2668 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2669 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2670 //%note jvm_r6
2671 return os::lseek(fd, offset, whence);
2672 JVM_END
2675 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2676 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2677 return os::ftruncate(fd, length);
2678 JVM_END
2681 JVM_LEAF(jint, JVM_Sync(jint fd))
2682 JVMWrapper2("JVM_Sync (0x%x)", fd);
2683 //%note jvm_r6
2684 return os::fsync(fd);
2685 JVM_END
2688 // Printing support //////////////////////////////////////////////////
2689 extern "C" {
2691 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2692 // see bug 4399518, 4417214
2693 if ((intptr_t)count <= 0) return -1;
2694 return vsnprintf(str, count, fmt, args);
2695 }
2698 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2699 va_list args;
2700 int len;
2701 va_start(args, fmt);
2702 len = jio_vsnprintf(str, count, fmt, args);
2703 va_end(args);
2704 return len;
2705 }
2708 int jio_fprintf(FILE* f, const char *fmt, ...) {
2709 int len;
2710 va_list args;
2711 va_start(args, fmt);
2712 len = jio_vfprintf(f, fmt, args);
2713 va_end(args);
2714 return len;
2715 }
2718 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2719 if (Arguments::vfprintf_hook() != NULL) {
2720 return Arguments::vfprintf_hook()(f, fmt, args);
2721 } else {
2722 return vfprintf(f, fmt, args);
2723 }
2724 }
2727 JNIEXPORT int jio_printf(const char *fmt, ...) {
2728 int len;
2729 va_list args;
2730 va_start(args, fmt);
2731 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2732 va_end(args);
2733 return len;
2734 }
2737 // HotSpot specific jio method
2738 void jio_print(const char* s) {
2739 // Try to make this function as atomic as possible.
2740 if (Arguments::vfprintf_hook() != NULL) {
2741 jio_fprintf(defaultStream::output_stream(), "%s", s);
2742 } else {
2743 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2744 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2745 }
2746 }
2748 } // Extern C
2750 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2752 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2753 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2754 // OSThread objects. The exception to this rule is when the target object is the thread
2755 // doing the operation, in which case we know that the thread won't exit until the
2756 // operation is done (all exits being voluntary). There are a few cases where it is
2757 // rather silly to do operations on yourself, like resuming yourself or asking whether
2758 // you are alive. While these can still happen, they are not subject to deadlocks if
2759 // the lock is held while the operation occurs (this is not the case for suspend, for
2760 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2761 // implementation is local to this file, we always lock Threads_lock for that one.
2763 static void thread_entry(JavaThread* thread, TRAPS) {
2764 HandleMark hm(THREAD);
2765 Handle obj(THREAD, thread->threadObj());
2766 JavaValue result(T_VOID);
2767 JavaCalls::call_virtual(&result,
2768 obj,
2769 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2770 vmSymbols::run_method_name(),
2771 vmSymbols::void_method_signature(),
2772 THREAD);
2773 }
2776 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2777 JVMWrapper("JVM_StartThread");
2778 JavaThread *native_thread = NULL;
2780 // We cannot hold the Threads_lock when we throw an exception,
2781 // due to rank ordering issues. Example: we might need to grab the
2782 // Heap_lock while we construct the exception.
2783 bool throw_illegal_thread_state = false;
2785 // We must release the Threads_lock before we can post a jvmti event
2786 // in Thread::start.
2787 {
2788 // Ensure that the C++ Thread and OSThread structures aren't freed before
2789 // we operate.
2790 MutexLocker mu(Threads_lock);
2792 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2793 // re-starting an already started thread, so we should usually find
2794 // that the JavaThread is null. However for a JNI attached thread
2795 // there is a small window between the Thread object being created
2796 // (with its JavaThread set) and the update to its threadStatus, so we
2797 // have to check for this
2798 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2799 throw_illegal_thread_state = true;
2800 } else {
2801 // We could also check the stillborn flag to see if this thread was already stopped, but
2802 // for historical reasons we let the thread detect that itself when it starts running
2804 jlong size =
2805 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2806 // Allocate the C++ Thread structure and create the native thread. The
2807 // stack size retrieved from java is signed, but the constructor takes
2808 // size_t (an unsigned type), so avoid passing negative values which would
2809 // result in really large stacks.
2810 size_t sz = size > 0 ? (size_t) size : 0;
2811 native_thread = new JavaThread(&thread_entry, sz);
2813 // At this point it may be possible that no osthread was created for the
2814 // JavaThread due to lack of memory. Check for this situation and throw
2815 // an exception if necessary. Eventually we may want to change this so
2816 // that we only grab the lock if the thread was created successfully -
2817 // then we can also do this check and throw the exception in the
2818 // JavaThread constructor.
2819 if (native_thread->osthread() != NULL) {
2820 // Note: the current thread is not being used within "prepare".
2821 native_thread->prepare(jthread);
2822 }
2823 }
2824 }
2826 if (throw_illegal_thread_state) {
2827 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2828 }
2830 assert(native_thread != NULL, "Starting null thread?");
2832 if (native_thread->osthread() == NULL) {
2833 // No one should hold a reference to the 'native_thread'.
2834 delete native_thread;
2835 if (JvmtiExport::should_post_resource_exhausted()) {
2836 JvmtiExport::post_resource_exhausted(
2837 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2838 "unable to create new native thread");
2839 }
2840 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2841 "unable to create new native thread");
2842 }
2844 Thread::start(native_thread);
2846 JVM_END
2848 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2849 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2850 // but is thought to be reliable and simple. In the case, where the receiver is the
2851 // same thread as the sender, no safepoint is needed.
2852 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2853 JVMWrapper("JVM_StopThread");
2855 oop java_throwable = JNIHandles::resolve(throwable);
2856 if (java_throwable == NULL) {
2857 THROW(vmSymbols::java_lang_NullPointerException());
2858 }
2859 oop java_thread = JNIHandles::resolve_non_null(jthread);
2860 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2861 Events::log_exception(JavaThread::current(),
2862 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2863 receiver, (address)java_thread, throwable);
2864 // First check if thread is alive
2865 if (receiver != NULL) {
2866 // Check if exception is getting thrown at self (use oop equality, since the
2867 // target object might exit)
2868 if (java_thread == thread->threadObj()) {
2869 THROW_OOP(java_throwable);
2870 } else {
2871 // Enques a VM_Operation to stop all threads and then deliver the exception...
2872 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2873 }
2874 }
2875 else {
2876 // Either:
2877 // - target thread has not been started before being stopped, or
2878 // - target thread already terminated
2879 // We could read the threadStatus to determine which case it is
2880 // but that is overkill as it doesn't matter. We must set the
2881 // stillborn flag for the first case, and if the thread has already
2882 // exited setting this flag has no affect
2883 java_lang_Thread::set_stillborn(java_thread);
2884 }
2885 JVM_END
2888 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2889 JVMWrapper("JVM_IsThreadAlive");
2891 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2892 return java_lang_Thread::is_alive(thread_oop);
2893 JVM_END
2896 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2897 JVMWrapper("JVM_SuspendThread");
2898 oop java_thread = JNIHandles::resolve_non_null(jthread);
2899 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2901 if (receiver != NULL) {
2902 // thread has run and has not exited (still on threads list)
2904 {
2905 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2906 if (receiver->is_external_suspend()) {
2907 // Don't allow nested external suspend requests. We can't return
2908 // an error from this interface so just ignore the problem.
2909 return;
2910 }
2911 if (receiver->is_exiting()) { // thread is in the process of exiting
2912 return;
2913 }
2914 receiver->set_external_suspend();
2915 }
2917 // java_suspend() will catch threads in the process of exiting
2918 // and will ignore them.
2919 receiver->java_suspend();
2921 // It would be nice to have the following assertion in all the
2922 // time, but it is possible for a racing resume request to have
2923 // resumed this thread right after we suspended it. Temporarily
2924 // enable this assertion if you are chasing a different kind of
2925 // bug.
2926 //
2927 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2928 // receiver->is_being_ext_suspended(), "thread is not suspended");
2929 }
2930 JVM_END
2933 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2934 JVMWrapper("JVM_ResumeThread");
2935 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2936 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2937 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2938 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2939 // looks at it.
2940 MutexLocker ml(Threads_lock);
2941 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2942 if (thr != NULL) {
2943 // the thread has run and is not in the process of exiting
2944 thr->java_resume();
2945 }
2946 JVM_END
2949 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2950 JVMWrapper("JVM_SetThreadPriority");
2951 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2952 MutexLocker ml(Threads_lock);
2953 oop java_thread = JNIHandles::resolve_non_null(jthread);
2954 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2955 JavaThread* thr = java_lang_Thread::thread(java_thread);
2956 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2957 Thread::set_priority(thr, (ThreadPriority)prio);
2958 }
2959 JVM_END
2962 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2963 JVMWrapper("JVM_Yield");
2964 if (os::dont_yield()) return;
2965 #ifndef USDT2
2966 HS_DTRACE_PROBE0(hotspot, thread__yield);
2967 #else /* USDT2 */
2968 HOTSPOT_THREAD_YIELD();
2969 #endif /* USDT2 */
2970 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2971 // Critical for similar threading behaviour
2972 if (ConvertYieldToSleep) {
2973 os::sleep(thread, MinSleepInterval, false);
2974 } else {
2975 os::yield();
2976 }
2977 JVM_END
2980 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2981 JVMWrapper("JVM_Sleep");
2983 if (millis < 0) {
2984 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2985 }
2987 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2988 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2989 }
2991 // Save current thread state and restore it at the end of this block.
2992 // And set new thread state to SLEEPING.
2993 JavaThreadSleepState jtss(thread);
2995 #ifndef USDT2
2996 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
2997 #else /* USDT2 */
2998 HOTSPOT_THREAD_SLEEP_BEGIN(
2999 millis);
3000 #endif /* USDT2 */
3002 if (millis == 0) {
3003 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3004 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3005 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3006 // for SOLARIS
3007 if (ConvertSleepToYield) {
3008 os::yield();
3009 } else {
3010 ThreadState old_state = thread->osthread()->get_state();
3011 thread->osthread()->set_state(SLEEPING);
3012 os::sleep(thread, MinSleepInterval, false);
3013 thread->osthread()->set_state(old_state);
3014 }
3015 } else {
3016 ThreadState old_state = thread->osthread()->get_state();
3017 thread->osthread()->set_state(SLEEPING);
3018 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3019 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3020 // us while we were sleeping. We do not overwrite those.
3021 if (!HAS_PENDING_EXCEPTION) {
3022 #ifndef USDT2
3023 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3024 #else /* USDT2 */
3025 HOTSPOT_THREAD_SLEEP_END(
3026 1);
3027 #endif /* USDT2 */
3028 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3029 // to properly restore the thread state. That's likely wrong.
3030 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3031 }
3032 }
3033 thread->osthread()->set_state(old_state);
3034 }
3035 #ifndef USDT2
3036 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3037 #else /* USDT2 */
3038 HOTSPOT_THREAD_SLEEP_END(
3039 0);
3040 #endif /* USDT2 */
3041 JVM_END
3043 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3044 JVMWrapper("JVM_CurrentThread");
3045 oop jthread = thread->threadObj();
3046 assert (thread != NULL, "no current thread!");
3047 return JNIHandles::make_local(env, jthread);
3048 JVM_END
3051 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3052 JVMWrapper("JVM_CountStackFrames");
3054 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3055 oop java_thread = JNIHandles::resolve_non_null(jthread);
3056 bool throw_illegal_thread_state = false;
3057 int count = 0;
3059 {
3060 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3061 // We need to re-resolve the java_thread, since a GC might have happened during the
3062 // acquire of the lock
3063 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3065 if (thr == NULL) {
3066 // do nothing
3067 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3068 // Check whether this java thread has been suspended already. If not, throws
3069 // IllegalThreadStateException. We defer to throw that exception until
3070 // Threads_lock is released since loading exception class has to leave VM.
3071 // The correct way to test a thread is actually suspended is
3072 // wait_for_ext_suspend_completion(), but we can't call that while holding
3073 // the Threads_lock. The above tests are sufficient for our purposes
3074 // provided the walkability of the stack is stable - which it isn't
3075 // 100% but close enough for most practical purposes.
3076 throw_illegal_thread_state = true;
3077 } else {
3078 // Count all java activation, i.e., number of vframes
3079 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3080 // Native frames are not counted
3081 if (!vfst.method()->is_native()) count++;
3082 }
3083 }
3084 }
3086 if (throw_illegal_thread_state) {
3087 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3088 "this thread is not suspended");
3089 }
3090 return count;
3091 JVM_END
3093 // Consider: A better way to implement JVM_Interrupt() is to acquire
3094 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3095 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3096 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3097 // outside the critical section. Threads_lock is hot so we want to minimize
3098 // the hold-time. A cleaner interface would be to decompose interrupt into
3099 // two steps. The 1st phase, performed under Threads_lock, would return
3100 // a closure that'd be invoked after Threads_lock was dropped.
3101 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3102 // admit spurious wakeups.
3104 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3105 JVMWrapper("JVM_Interrupt");
3107 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3108 oop java_thread = JNIHandles::resolve_non_null(jthread);
3109 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3110 // We need to re-resolve the java_thread, since a GC might have happened during the
3111 // acquire of the lock
3112 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3113 if (thr != NULL) {
3114 Thread::interrupt(thr);
3115 }
3116 JVM_END
3119 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3120 JVMWrapper("JVM_IsInterrupted");
3122 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3123 oop java_thread = JNIHandles::resolve_non_null(jthread);
3124 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3125 // We need to re-resolve the java_thread, since a GC might have happened during the
3126 // acquire of the lock
3127 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3128 if (thr == NULL) {
3129 return JNI_FALSE;
3130 } else {
3131 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3132 }
3133 JVM_END
3136 // Return true iff the current thread has locked the object passed in
3138 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3139 JVMWrapper("JVM_HoldsLock");
3140 assert(THREAD->is_Java_thread(), "sanity check");
3141 if (obj == NULL) {
3142 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3143 }
3144 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3145 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3146 JVM_END
3149 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3150 JVMWrapper("JVM_DumpAllStacks");
3151 VM_PrintThreads op;
3152 VMThread::execute(&op);
3153 if (JvmtiExport::should_post_data_dump()) {
3154 JvmtiExport::post_data_dump();
3155 }
3156 JVM_END
3158 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3159 JVMWrapper("JVM_SetNativeThreadName");
3160 ResourceMark rm(THREAD);
3161 oop java_thread = JNIHandles::resolve_non_null(jthread);
3162 JavaThread* thr = java_lang_Thread::thread(java_thread);
3163 // Thread naming only supported for the current thread, doesn't work for
3164 // target threads.
3165 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3166 // we don't set the name of an attached thread to avoid stepping
3167 // on other programs
3168 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3169 os::set_native_thread_name(thread_name);
3170 }
3171 JVM_END
3173 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3175 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3176 assert(jthread->is_Java_thread(), "must be a Java thread");
3177 if (jthread->privileged_stack_top() == NULL) return false;
3178 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3179 oop loader = jthread->privileged_stack_top()->class_loader();
3180 if (loader == NULL) return true;
3181 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3182 if (trusted) return true;
3183 }
3184 return false;
3185 }
3187 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3188 JVMWrapper("JVM_CurrentLoadedClass");
3189 ResourceMark rm(THREAD);
3191 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3192 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3193 bool trusted = is_trusted_frame(thread, &vfst);
3194 if (trusted) return NULL;
3196 Method* m = vfst.method();
3197 if (!m->is_native()) {
3198 InstanceKlass* holder = m->method_holder();
3199 oop loader = holder->class_loader();
3200 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3201 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3202 }
3203 }
3204 }
3205 return NULL;
3206 JVM_END
3209 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3210 JVMWrapper("JVM_CurrentClassLoader");
3211 ResourceMark rm(THREAD);
3213 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3215 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3216 bool trusted = is_trusted_frame(thread, &vfst);
3217 if (trusted) return NULL;
3219 Method* m = vfst.method();
3220 if (!m->is_native()) {
3221 InstanceKlass* holder = m->method_holder();
3222 assert(holder->is_klass(), "just checking");
3223 oop loader = holder->class_loader();
3224 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3225 return JNIHandles::make_local(env, loader);
3226 }
3227 }
3228 }
3229 return NULL;
3230 JVM_END
3233 // Utility object for collecting method holders walking down the stack
3234 class KlassLink: public ResourceObj {
3235 public:
3236 KlassHandle klass;
3237 KlassLink* next;
3239 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3240 };
3243 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3244 JVMWrapper("JVM_GetClassContext");
3245 ResourceMark rm(THREAD);
3246 JvmtiVMObjectAllocEventCollector oam;
3247 // Collect linked list of (handles to) method holders
3248 KlassLink* first = NULL;
3249 KlassLink* last = NULL;
3250 int depth = 0;
3251 vframeStream vfst(thread);
3253 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3254 // This must only be called from SecurityManager.getClassContext
3255 Method* m = vfst.method();
3256 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3257 m->name() == vmSymbols::getClassContext_name() &&
3258 m->signature() == vmSymbols::void_class_array_signature())) {
3259 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3260 }
3261 }
3263 // Collect method holders
3264 for (; !vfst.at_end(); vfst.security_next()) {
3265 Method* m = vfst.method();
3266 // Native frames are not returned
3267 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3268 Klass* holder = m->method_holder();
3269 assert(holder->is_klass(), "just checking");
3270 depth++;
3271 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3272 if (first == NULL) {
3273 first = last = l;
3274 } else {
3275 last->next = l;
3276 last = l;
3277 }
3278 }
3279 }
3281 // Create result array of type [Ljava/lang/Class;
3282 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3283 // Fill in mirrors corresponding to method holders
3284 int index = 0;
3285 while (first != NULL) {
3286 result->obj_at_put(index++, first->klass()->java_mirror());
3287 first = first->next;
3288 }
3289 assert(index == depth, "just checking");
3291 return (jobjectArray) JNIHandles::make_local(env, result);
3292 JVM_END
3295 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3296 JVMWrapper("JVM_ClassDepth");
3297 ResourceMark rm(THREAD);
3298 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3299 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3301 const char* str = java_lang_String::as_utf8_string(class_name_str());
3302 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3303 if (class_name_sym == NULL) {
3304 return -1;
3305 }
3307 int depth = 0;
3309 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3310 if (!vfst.method()->is_native()) {
3311 InstanceKlass* holder = vfst.method()->method_holder();
3312 assert(holder->is_klass(), "just checking");
3313 if (holder->name() == class_name_sym) {
3314 return depth;
3315 }
3316 depth++;
3317 }
3318 }
3319 return -1;
3320 JVM_END
3323 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3324 JVMWrapper("JVM_ClassLoaderDepth");
3325 ResourceMark rm(THREAD);
3326 int depth = 0;
3327 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3328 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3329 bool trusted = is_trusted_frame(thread, &vfst);
3330 if (trusted) return -1;
3332 Method* m = vfst.method();
3333 if (!m->is_native()) {
3334 InstanceKlass* holder = m->method_holder();
3335 assert(holder->is_klass(), "just checking");
3336 oop loader = holder->class_loader();
3337 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3338 return depth;
3339 }
3340 depth++;
3341 }
3342 }
3343 return -1;
3344 JVM_END
3347 // java.lang.Package ////////////////////////////////////////////////////////////////
3350 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3351 JVMWrapper("JVM_GetSystemPackage");
3352 ResourceMark rm(THREAD);
3353 JvmtiVMObjectAllocEventCollector oam;
3354 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3355 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3356 return (jstring) JNIHandles::make_local(result);
3357 JVM_END
3360 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3361 JVMWrapper("JVM_GetSystemPackages");
3362 JvmtiVMObjectAllocEventCollector oam;
3363 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3364 return (jobjectArray) JNIHandles::make_local(result);
3365 JVM_END
3368 // ObjectInputStream ///////////////////////////////////////////////////////////////
3370 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3371 if (current_class == NULL) {
3372 return true;
3373 }
3374 if ((current_class == field_class) || access.is_public()) {
3375 return true;
3376 }
3378 if (access.is_protected()) {
3379 // See if current_class is a subclass of field_class
3380 if (current_class->is_subclass_of(field_class)) {
3381 return true;
3382 }
3383 }
3385 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3386 }
3389 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3390 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3391 JVMWrapper("JVM_AllocateNewObject");
3392 JvmtiVMObjectAllocEventCollector oam;
3393 // Receiver is not used
3394 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3395 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3397 // Cannot instantiate primitive types
3398 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3399 ResourceMark rm(THREAD);
3400 THROW_0(vmSymbols::java_lang_InvalidClassException());
3401 }
3403 // Arrays not allowed here, must use JVM_AllocateNewArray
3404 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3405 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3406 ResourceMark rm(THREAD);
3407 THROW_0(vmSymbols::java_lang_InvalidClassException());
3408 }
3410 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3411 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3413 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3415 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3416 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3418 // Make sure klass is initialized, since we are about to instantiate one of them.
3419 curr_klass->initialize(CHECK_NULL);
3421 methodHandle m (THREAD,
3422 init_klass->find_method(vmSymbols::object_initializer_name(),
3423 vmSymbols::void_method_signature()));
3424 if (m.is_null()) {
3425 ResourceMark rm(THREAD);
3426 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3427 Method::name_and_sig_as_C_string(init_klass(),
3428 vmSymbols::object_initializer_name(),
3429 vmSymbols::void_method_signature()));
3430 }
3432 if (curr_klass == init_klass && !m->is_public()) {
3433 // Calling the constructor for class 'curr_klass'.
3434 // Only allow calls to a public no-arg constructor.
3435 // This path corresponds to creating an Externalizable object.
3436 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3437 }
3439 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3440 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3441 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3442 }
3444 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3445 // Call constructor m. This might call a constructor higher up in the hierachy
3446 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3448 return JNIHandles::make_local(obj());
3449 JVM_END
3452 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3453 JVMWrapper("JVM_AllocateNewArray");
3454 JvmtiVMObjectAllocEventCollector oam;
3455 oop mirror = JNIHandles::resolve_non_null(currClass);
3457 if (java_lang_Class::is_primitive(mirror)) {
3458 THROW_0(vmSymbols::java_lang_InvalidClassException());
3459 }
3460 Klass* k = java_lang_Class::as_Klass(mirror);
3461 oop result;
3463 if (k->oop_is_typeArray()) {
3464 // typeArray
3465 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3466 } else if (k->oop_is_objArray()) {
3467 // objArray
3468 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3469 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3470 result = oak->allocate(length, CHECK_NULL);
3471 } else {
3472 THROW_0(vmSymbols::java_lang_InvalidClassException());
3473 }
3474 return JNIHandles::make_local(env, result);
3475 JVM_END
3478 // Return the first non-null class loader up the execution stack, or null
3479 // if only code from the null class loader is on the stack.
3481 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3482 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3483 // UseNewReflection
3484 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3485 oop loader = vfst.method()->method_holder()->class_loader();
3486 if (loader != NULL) {
3487 return JNIHandles::make_local(env, loader);
3488 }
3489 }
3490 return NULL;
3491 JVM_END
3494 // Load a class relative to the most recent class on the stack with a non-null
3495 // classloader.
3496 // This function has been deprecated and should not be considered part of the
3497 // specified JVM interface.
3499 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3500 jclass currClass, jstring currClassName))
3501 JVMWrapper("JVM_LoadClass0");
3502 // Receiver is not used
3503 ResourceMark rm(THREAD);
3505 // Class name argument is not guaranteed to be in internal format
3506 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3507 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3509 const char* str = java_lang_String::as_utf8_string(string());
3511 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3512 // It's impossible to create this class; the name cannot fit
3513 // into the constant pool.
3514 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3515 }
3517 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3518 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3519 // Find the most recent class on the stack with a non-null classloader
3520 oop loader = NULL;
3521 oop protection_domain = NULL;
3522 if (curr_klass.is_null()) {
3523 for (vframeStream vfst(thread);
3524 !vfst.at_end() && loader == NULL;
3525 vfst.next()) {
3526 if (!vfst.method()->is_native()) {
3527 InstanceKlass* holder = vfst.method()->method_holder();
3528 loader = holder->class_loader();
3529 protection_domain = holder->protection_domain();
3530 }
3531 }
3532 } else {
3533 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3534 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3535 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3536 }
3537 Handle h_loader(THREAD, loader);
3538 Handle h_prot (THREAD, protection_domain);
3539 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3540 false, thread);
3541 if (TraceClassResolution && result != NULL) {
3542 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3543 }
3544 return result;
3545 JVM_END
3548 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3551 // resolve array handle and check arguments
3552 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3553 if (arr == NULL) {
3554 THROW_0(vmSymbols::java_lang_NullPointerException());
3555 }
3556 oop a = JNIHandles::resolve_non_null(arr);
3557 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3558 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3559 }
3560 return arrayOop(a);
3561 }
3564 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3565 JVMWrapper("JVM_GetArrayLength");
3566 arrayOop a = check_array(env, arr, false, CHECK_0);
3567 return a->length();
3568 JVM_END
3571 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3572 JVMWrapper("JVM_Array_Get");
3573 JvmtiVMObjectAllocEventCollector oam;
3574 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3575 jvalue value;
3576 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3577 oop box = Reflection::box(&value, type, CHECK_NULL);
3578 return JNIHandles::make_local(env, box);
3579 JVM_END
3582 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3583 JVMWrapper("JVM_GetPrimitiveArrayElement");
3584 jvalue value;
3585 value.i = 0; // to initialize value before getting used in CHECK
3586 arrayOop a = check_array(env, arr, true, CHECK_(value));
3587 assert(a->is_typeArray(), "just checking");
3588 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3589 BasicType wide_type = (BasicType) wCode;
3590 if (type != wide_type) {
3591 Reflection::widen(&value, type, wide_type, CHECK_(value));
3592 }
3593 return value;
3594 JVM_END
3597 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3598 JVMWrapper("JVM_SetArrayElement");
3599 arrayOop a = check_array(env, arr, false, CHECK);
3600 oop box = JNIHandles::resolve(val);
3601 jvalue value;
3602 value.i = 0; // to initialize value before getting used in CHECK
3603 BasicType value_type;
3604 if (a->is_objArray()) {
3605 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3606 value_type = Reflection::unbox_for_regular_object(box, &value);
3607 } else {
3608 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3609 }
3610 Reflection::array_set(&value, a, index, value_type, CHECK);
3611 JVM_END
3614 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3615 JVMWrapper("JVM_SetPrimitiveArrayElement");
3616 arrayOop a = check_array(env, arr, true, CHECK);
3617 assert(a->is_typeArray(), "just checking");
3618 BasicType value_type = (BasicType) vCode;
3619 Reflection::array_set(&v, a, index, value_type, CHECK);
3620 JVM_END
3623 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3624 JVMWrapper("JVM_NewArray");
3625 JvmtiVMObjectAllocEventCollector oam;
3626 oop element_mirror = JNIHandles::resolve(eltClass);
3627 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3628 return JNIHandles::make_local(env, result);
3629 JVM_END
3632 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3633 JVMWrapper("JVM_NewMultiArray");
3634 JvmtiVMObjectAllocEventCollector oam;
3635 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3636 oop element_mirror = JNIHandles::resolve(eltClass);
3637 assert(dim_array->is_typeArray(), "just checking");
3638 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3639 return JNIHandles::make_local(env, result);
3640 JVM_END
3643 // Networking library support ////////////////////////////////////////////////////////////////////
3645 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3646 JVMWrapper("JVM_InitializeSocketLibrary");
3647 return 0;
3648 JVM_END
3651 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3652 JVMWrapper("JVM_Socket");
3653 return os::socket(domain, type, protocol);
3654 JVM_END
3657 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3658 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3659 //%note jvm_r6
3660 return os::socket_close(fd);
3661 JVM_END
3664 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3665 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3666 //%note jvm_r6
3667 return os::socket_shutdown(fd, howto);
3668 JVM_END
3671 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3672 JVMWrapper2("JVM_Recv (0x%x)", fd);
3673 //%note jvm_r6
3674 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3675 JVM_END
3678 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3679 JVMWrapper2("JVM_Send (0x%x)", fd);
3680 //%note jvm_r6
3681 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3682 JVM_END
3685 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3686 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3687 //%note jvm_r6
3688 return os::timeout(fd, timeout);
3689 JVM_END
3692 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3693 JVMWrapper2("JVM_Listen (0x%x)", fd);
3694 //%note jvm_r6
3695 return os::listen(fd, count);
3696 JVM_END
3699 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3700 JVMWrapper2("JVM_Connect (0x%x)", fd);
3701 //%note jvm_r6
3702 return os::connect(fd, him, (socklen_t)len);
3703 JVM_END
3706 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3707 JVMWrapper2("JVM_Bind (0x%x)", fd);
3708 //%note jvm_r6
3709 return os::bind(fd, him, (socklen_t)len);
3710 JVM_END
3713 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3714 JVMWrapper2("JVM_Accept (0x%x)", fd);
3715 //%note jvm_r6
3716 socklen_t socklen = (socklen_t)(*len);
3717 jint result = os::accept(fd, him, &socklen);
3718 *len = (jint)socklen;
3719 return result;
3720 JVM_END
3723 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3724 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3725 //%note jvm_r6
3726 socklen_t socklen = (socklen_t)(*fromlen);
3727 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3728 *fromlen = (int)socklen;
3729 return result;
3730 JVM_END
3733 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3734 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3735 //%note jvm_r6
3736 socklen_t socklen = (socklen_t)(*len);
3737 jint result = os::get_sock_name(fd, him, &socklen);
3738 *len = (int)socklen;
3739 return result;
3740 JVM_END
3743 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3744 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3745 //%note jvm_r6
3746 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3747 JVM_END
3750 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3751 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3752 //%note jvm_r6
3753 return os::socket_available(fd, pbytes);
3754 JVM_END
3757 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3758 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3759 //%note jvm_r6
3760 socklen_t socklen = (socklen_t)(*optlen);
3761 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3762 *optlen = (int)socklen;
3763 return result;
3764 JVM_END
3767 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3768 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3769 //%note jvm_r6
3770 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3771 JVM_END
3774 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3775 JVMWrapper("JVM_GetHostName");
3776 return os::get_host_name(name, namelen);
3777 JVM_END
3780 // Library support ///////////////////////////////////////////////////////////////////////////
3782 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3783 //%note jvm_ct
3784 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3785 char ebuf[1024];
3786 void *load_result;
3787 {
3788 ThreadToNativeFromVM ttnfvm(thread);
3789 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3790 }
3791 if (load_result == NULL) {
3792 char msg[1024];
3793 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3794 // Since 'ebuf' may contain a string encoded using
3795 // platform encoding scheme, we need to pass
3796 // Exceptions::unsafe_to_utf8 to the new_exception method
3797 // as the last argument. See bug 6367357.
3798 Handle h_exception =
3799 Exceptions::new_exception(thread,
3800 vmSymbols::java_lang_UnsatisfiedLinkError(),
3801 msg, Exceptions::unsafe_to_utf8);
3803 THROW_HANDLE_0(h_exception);
3804 }
3805 return load_result;
3806 JVM_END
3809 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3810 JVMWrapper("JVM_UnloadLibrary");
3811 os::dll_unload(handle);
3812 JVM_END
3815 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3816 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3817 return os::dll_lookup(handle, name);
3818 JVM_END
3821 // Floating point support ////////////////////////////////////////////////////////////////////
3823 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3824 JVMWrapper("JVM_IsNaN");
3825 return g_isnan(a);
3826 JVM_END
3829 // JNI version ///////////////////////////////////////////////////////////////////////////////
3831 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3832 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3833 return Threads::is_supported_jni_version_including_1_1(version);
3834 JVM_END
3837 // String support ///////////////////////////////////////////////////////////////////////////
3839 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3840 JVMWrapper("JVM_InternString");
3841 JvmtiVMObjectAllocEventCollector oam;
3842 if (str == NULL) return NULL;
3843 oop string = JNIHandles::resolve_non_null(str);
3844 oop result = StringTable::intern(string, CHECK_NULL);
3845 return (jstring) JNIHandles::make_local(env, result);
3846 JVM_END
3849 // Raw monitor support //////////////////////////////////////////////////////////////////////
3851 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3852 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3853 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3854 // that only works with java threads.
3857 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3858 VM_Exit::block_if_vm_exited();
3859 JVMWrapper("JVM_RawMonitorCreate");
3860 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3861 }
3864 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3865 VM_Exit::block_if_vm_exited();
3866 JVMWrapper("JVM_RawMonitorDestroy");
3867 delete ((Mutex*) mon);
3868 }
3871 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3872 VM_Exit::block_if_vm_exited();
3873 JVMWrapper("JVM_RawMonitorEnter");
3874 ((Mutex*) mon)->jvm_raw_lock();
3875 return 0;
3876 }
3879 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3880 VM_Exit::block_if_vm_exited();
3881 JVMWrapper("JVM_RawMonitorExit");
3882 ((Mutex*) mon)->jvm_raw_unlock();
3883 }
3886 // Support for Serialization
3888 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3889 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3890 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3891 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3893 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3894 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3895 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3896 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3899 void initialize_converter_functions() {
3900 if (JDK_Version::is_gte_jdk14x_version()) {
3901 // These functions only exist for compatibility with 1.3.1 and earlier
3902 return;
3903 }
3905 // called from universe_post_init()
3906 assert(
3907 int_bits_to_float_fn == NULL &&
3908 long_bits_to_double_fn == NULL &&
3909 float_to_int_bits_fn == NULL &&
3910 double_to_long_bits_fn == NULL ,
3911 "initialization done twice"
3912 );
3913 // initialize
3914 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3915 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3916 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3917 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3918 // verify
3919 assert(
3920 int_bits_to_float_fn != NULL &&
3921 long_bits_to_double_fn != NULL &&
3922 float_to_int_bits_fn != NULL &&
3923 double_to_long_bits_fn != NULL ,
3924 "initialization failed"
3925 );
3926 }
3929 // Serialization
3930 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3931 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3932 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3934 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3935 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3936 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3937 oop o = JNIHandles::resolve(obj);
3939 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3940 THROW(vmSymbols::java_lang_NullPointerException());
3941 }
3943 jsize nfids = fids->length();
3944 if (nfids == 0) return;
3946 if (tcodes->length() < nfids) {
3947 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3948 }
3950 jsize off = 0;
3951 /* loop through fields, setting values */
3952 for (jsize i = 0; i < nfids; i++) {
3953 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3954 int field_offset;
3955 if (fid != NULL) {
3956 // NULL is a legal value for fid, but retrieving the field offset
3957 // trigger assertion in that case
3958 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3959 }
3961 switch (tcodes->char_at(i)) {
3962 case 'Z':
3963 if (fid != NULL) {
3964 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3965 o->bool_field_put(field_offset, val);
3966 }
3967 off++;
3968 break;
3970 case 'B':
3971 if (fid != NULL) {
3972 o->byte_field_put(field_offset, dbuf->byte_at(off));
3973 }
3974 off++;
3975 break;
3977 case 'C':
3978 if (fid != NULL) {
3979 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3980 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3981 o->char_field_put(field_offset, val);
3982 }
3983 off += 2;
3984 break;
3986 case 'S':
3987 if (fid != NULL) {
3988 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3989 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3990 o->short_field_put(field_offset, val);
3991 }
3992 off += 2;
3993 break;
3995 case 'I':
3996 if (fid != NULL) {
3997 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
3998 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
3999 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4000 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4001 o->int_field_put(field_offset, ival);
4002 }
4003 off += 4;
4004 break;
4006 case 'F':
4007 if (fid != NULL) {
4008 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4009 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4010 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4011 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4012 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4013 o->float_field_put(field_offset, fval);
4014 }
4015 off += 4;
4016 break;
4018 case 'J':
4019 if (fid != NULL) {
4020 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4021 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4022 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4023 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4024 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4025 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4026 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4027 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4028 o->long_field_put(field_offset, lval);
4029 }
4030 off += 8;
4031 break;
4033 case 'D':
4034 if (fid != NULL) {
4035 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4036 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4037 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4038 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4039 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4040 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4041 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4042 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4043 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4044 o->double_field_put(field_offset, dval);
4045 }
4046 off += 8;
4047 break;
4049 default:
4050 // Illegal typecode
4051 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4052 }
4053 }
4054 JVM_END
4057 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4058 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4059 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4061 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4062 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4063 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4064 oop o = JNIHandles::resolve(obj);
4066 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4067 THROW(vmSymbols::java_lang_NullPointerException());
4068 }
4070 jsize nfids = fids->length();
4071 if (nfids == 0) return;
4073 if (tcodes->length() < nfids) {
4074 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4075 }
4077 /* loop through fields, fetching values */
4078 jsize off = 0;
4079 for (jsize i = 0; i < nfids; i++) {
4080 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4081 if (fid == NULL) {
4082 THROW(vmSymbols::java_lang_NullPointerException());
4083 }
4084 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4086 switch (tcodes->char_at(i)) {
4087 case 'Z':
4088 {
4089 jboolean val = o->bool_field(field_offset);
4090 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4091 }
4092 break;
4094 case 'B':
4095 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4096 break;
4098 case 'C':
4099 {
4100 jchar val = o->char_field(field_offset);
4101 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4102 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4103 }
4104 break;
4106 case 'S':
4107 {
4108 jshort val = o->short_field(field_offset);
4109 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4110 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4111 }
4112 break;
4114 case 'I':
4115 {
4116 jint val = o->int_field(field_offset);
4117 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4118 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4119 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4120 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4121 }
4122 break;
4124 case 'F':
4125 {
4126 jfloat fval = o->float_field(field_offset);
4127 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4128 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4129 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4130 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4131 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4132 }
4133 break;
4135 case 'J':
4136 {
4137 jlong val = o->long_field(field_offset);
4138 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4139 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4140 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4141 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4142 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4143 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4144 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4145 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4146 }
4147 break;
4149 case 'D':
4150 {
4151 jdouble dval = o->double_field(field_offset);
4152 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4153 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4154 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4155 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4156 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4157 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4158 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4159 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4160 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4161 }
4162 break;
4164 default:
4165 // Illegal typecode
4166 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4167 }
4168 }
4169 JVM_END
4172 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4174 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4175 // Security Note:
4176 // The Java level wrapper will perform the necessary security check allowing
4177 // us to pass the NULL as the initiating class loader.
4178 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4180 KlassHandle klass_handle(THREAD, klass);
4181 // Check if we should initialize the class
4182 if (init && klass_handle->oop_is_instance()) {
4183 klass_handle->initialize(CHECK_NULL);
4184 }
4185 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4186 }
4189 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4191 #ifndef PRODUCT
4193 extern "C" {
4194 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4195 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4196 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4197 }
4199 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4200 JVMWrapper("JVM_AccessBoolVMFlag");
4201 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4202 JVM_END
4204 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4205 JVMWrapper("JVM_AccessVMIntFlag");
4206 intx v;
4207 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4208 *value = (jint)v;
4209 return result;
4210 JVM_END
4213 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4214 JVMWrapper("JVM_VMBreakPoint");
4215 oop the_obj = JNIHandles::resolve(obj);
4216 BREAKPOINT;
4217 JVM_END
4220 #endif
4223 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4225 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4226 JVMWrapper("JVM_InvokeMethod");
4227 Handle method_handle;
4228 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4229 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4230 Handle receiver(THREAD, JNIHandles::resolve(obj));
4231 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4232 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4233 jobject res = JNIHandles::make_local(env, result);
4234 if (JvmtiExport::should_post_vm_object_alloc()) {
4235 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4236 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4237 if (java_lang_Class::is_primitive(ret_type)) {
4238 // Only for primitive type vm allocates memory for java object.
4239 // See box() method.
4240 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4241 }
4242 }
4243 return res;
4244 } else {
4245 THROW_0(vmSymbols::java_lang_StackOverflowError());
4246 }
4247 JVM_END
4250 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4251 JVMWrapper("JVM_NewInstanceFromConstructor");
4252 oop constructor_mirror = JNIHandles::resolve(c);
4253 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4254 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4255 jobject res = JNIHandles::make_local(env, result);
4256 if (JvmtiExport::should_post_vm_object_alloc()) {
4257 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4258 }
4259 return res;
4260 JVM_END
4262 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4264 JVM_LEAF(jboolean, JVM_SupportsCX8())
4265 JVMWrapper("JVM_SupportsCX8");
4266 return VM_Version::supports_cx8();
4267 JVM_END
4270 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4271 JVMWrapper("JVM_CX8Field");
4272 jlong res;
4273 oop o = JNIHandles::resolve(obj);
4274 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4275 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4277 assert(VM_Version::supports_cx8(), "cx8 not supported");
4278 res = Atomic::cmpxchg(newVal, addr, oldVal);
4280 return res == oldVal;
4281 JVM_END
4283 // DTrace ///////////////////////////////////////////////////////////////////
4285 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4286 JVMWrapper("JVM_DTraceGetVersion");
4287 return (jint)JVM_TRACING_DTRACE_VERSION;
4288 JVM_END
4290 JVM_ENTRY(jlong,JVM_DTraceActivate(
4291 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4292 JVM_DTraceProvider* providers))
4293 JVMWrapper("JVM_DTraceActivate");
4294 return DTraceJSDT::activate(
4295 version, module_name, providers_count, providers, CHECK_0);
4296 JVM_END
4298 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4299 JVMWrapper("JVM_DTraceIsProbeEnabled");
4300 return DTraceJSDT::is_probe_enabled(method);
4301 JVM_END
4303 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4304 JVMWrapper("JVM_DTraceDispose");
4305 DTraceJSDT::dispose(handle);
4306 JVM_END
4308 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4309 JVMWrapper("JVM_DTraceIsSupported");
4310 return DTraceJSDT::is_supported();
4311 JVM_END
4313 // Returns an array of all live Thread objects (VM internal JavaThreads,
4314 // jvmti agent threads, and JNI attaching threads are skipped)
4315 // See CR 6404306 regarding JNI attaching threads
4316 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4317 ResourceMark rm(THREAD);
4318 ThreadsListEnumerator tle(THREAD, false, false);
4319 JvmtiVMObjectAllocEventCollector oam;
4321 int num_threads = tle.num_threads();
4322 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4323 objArrayHandle threads_ah(THREAD, r);
4325 for (int i = 0; i < num_threads; i++) {
4326 Handle h = tle.get_threadObj(i);
4327 threads_ah->obj_at_put(i, h());
4328 }
4330 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4331 JVM_END
4334 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4335 // Return StackTraceElement[][], each element is the stack trace of a thread in
4336 // the corresponding entry in the given threads array
4337 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4338 JVMWrapper("JVM_DumpThreads");
4339 JvmtiVMObjectAllocEventCollector oam;
4341 // Check if threads is null
4342 if (threads == NULL) {
4343 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4344 }
4346 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4347 objArrayHandle ah(THREAD, a);
4348 int num_threads = ah->length();
4349 // check if threads is non-empty array
4350 if (num_threads == 0) {
4351 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4352 }
4354 // check if threads is not an array of objects of Thread class
4355 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4356 if (k != SystemDictionary::Thread_klass()) {
4357 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4358 }
4360 ResourceMark rm(THREAD);
4362 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4363 for (int i = 0; i < num_threads; i++) {
4364 oop thread_obj = ah->obj_at(i);
4365 instanceHandle h(THREAD, (instanceOop) thread_obj);
4366 thread_handle_array->append(h);
4367 }
4369 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4370 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4372 JVM_END
4374 // JVM monitoring and management support
4375 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4376 return Management::get_jmm_interface(version);
4377 JVM_END
4379 // com.sun.tools.attach.VirtualMachine agent properties support
4380 //
4381 // Initialize the agent properties with the properties maintained in the VM
4382 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4383 JVMWrapper("JVM_InitAgentProperties");
4384 ResourceMark rm;
4386 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4388 PUTPROP(props, "sun.java.command", Arguments::java_command());
4389 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4390 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4391 return properties;
4392 JVM_END
4394 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4395 {
4396 JVMWrapper("JVM_GetEnclosingMethodInfo");
4397 JvmtiVMObjectAllocEventCollector oam;
4399 if (ofClass == NULL) {
4400 return NULL;
4401 }
4402 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4403 // Special handling for primitive objects
4404 if (java_lang_Class::is_primitive(mirror())) {
4405 return NULL;
4406 }
4407 Klass* k = java_lang_Class::as_Klass(mirror());
4408 if (!k->oop_is_instance()) {
4409 return NULL;
4410 }
4411 instanceKlassHandle ik_h(THREAD, k);
4412 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4413 if (encl_method_class_idx == 0) {
4414 return NULL;
4415 }
4416 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4417 objArrayHandle dest(THREAD, dest_o);
4418 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4419 dest->obj_at_put(0, enc_k->java_mirror());
4420 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4421 if (encl_method_method_idx != 0) {
4422 Symbol* sym = ik_h->constants()->symbol_at(
4423 extract_low_short_from_int(
4424 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4425 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4426 dest->obj_at_put(1, str());
4427 sym = ik_h->constants()->symbol_at(
4428 extract_high_short_from_int(
4429 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4430 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4431 dest->obj_at_put(2, str());
4432 }
4433 return (jobjectArray) JNIHandles::make_local(dest());
4434 }
4435 JVM_END
4437 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4438 jint javaThreadState))
4439 {
4440 // If new thread states are added in future JDK and VM versions,
4441 // this should check if the JDK version is compatible with thread
4442 // states supported by the VM. Return NULL if not compatible.
4443 //
4444 // This function must map the VM java_lang_Thread::ThreadStatus
4445 // to the Java thread state that the JDK supports.
4446 //
4448 typeArrayHandle values_h;
4449 switch (javaThreadState) {
4450 case JAVA_THREAD_STATE_NEW : {
4451 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4452 values_h = typeArrayHandle(THREAD, r);
4453 values_h->int_at_put(0, java_lang_Thread::NEW);
4454 break;
4455 }
4456 case JAVA_THREAD_STATE_RUNNABLE : {
4457 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4458 values_h = typeArrayHandle(THREAD, r);
4459 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4460 break;
4461 }
4462 case JAVA_THREAD_STATE_BLOCKED : {
4463 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4464 values_h = typeArrayHandle(THREAD, r);
4465 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4466 break;
4467 }
4468 case JAVA_THREAD_STATE_WAITING : {
4469 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4470 values_h = typeArrayHandle(THREAD, r);
4471 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4472 values_h->int_at_put(1, java_lang_Thread::PARKED);
4473 break;
4474 }
4475 case JAVA_THREAD_STATE_TIMED_WAITING : {
4476 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4477 values_h = typeArrayHandle(THREAD, r);
4478 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4479 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4480 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4481 break;
4482 }
4483 case JAVA_THREAD_STATE_TERMINATED : {
4484 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4485 values_h = typeArrayHandle(THREAD, r);
4486 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4487 break;
4488 }
4489 default:
4490 // Unknown state - probably incompatible JDK version
4491 return NULL;
4492 }
4494 return (jintArray) JNIHandles::make_local(env, values_h());
4495 }
4496 JVM_END
4499 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4500 jint javaThreadState,
4501 jintArray values))
4502 {
4503 // If new thread states are added in future JDK and VM versions,
4504 // this should check if the JDK version is compatible with thread
4505 // states supported by the VM. Return NULL if not compatible.
4506 //
4507 // This function must map the VM java_lang_Thread::ThreadStatus
4508 // to the Java thread state that the JDK supports.
4509 //
4511 ResourceMark rm;
4513 // Check if threads is null
4514 if (values == NULL) {
4515 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4516 }
4518 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4519 typeArrayHandle values_h(THREAD, v);
4521 objArrayHandle names_h;
4522 switch (javaThreadState) {
4523 case JAVA_THREAD_STATE_NEW : {
4524 assert(values_h->length() == 1 &&
4525 values_h->int_at(0) == java_lang_Thread::NEW,
4526 "Invalid threadStatus value");
4528 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4529 1, /* only 1 substate */
4530 CHECK_NULL);
4531 names_h = objArrayHandle(THREAD, r);
4532 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4533 names_h->obj_at_put(0, name());
4534 break;
4535 }
4536 case JAVA_THREAD_STATE_RUNNABLE : {
4537 assert(values_h->length() == 1 &&
4538 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4539 "Invalid threadStatus value");
4541 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4542 1, /* only 1 substate */
4543 CHECK_NULL);
4544 names_h = objArrayHandle(THREAD, r);
4545 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4546 names_h->obj_at_put(0, name());
4547 break;
4548 }
4549 case JAVA_THREAD_STATE_BLOCKED : {
4550 assert(values_h->length() == 1 &&
4551 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4552 "Invalid threadStatus value");
4554 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4555 1, /* only 1 substate */
4556 CHECK_NULL);
4557 names_h = objArrayHandle(THREAD, r);
4558 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4559 names_h->obj_at_put(0, name());
4560 break;
4561 }
4562 case JAVA_THREAD_STATE_WAITING : {
4563 assert(values_h->length() == 2 &&
4564 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4565 values_h->int_at(1) == java_lang_Thread::PARKED,
4566 "Invalid threadStatus value");
4567 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4568 2, /* number of substates */
4569 CHECK_NULL);
4570 names_h = objArrayHandle(THREAD, r);
4571 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4572 CHECK_NULL);
4573 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4574 CHECK_NULL);
4575 names_h->obj_at_put(0, name0());
4576 names_h->obj_at_put(1, name1());
4577 break;
4578 }
4579 case JAVA_THREAD_STATE_TIMED_WAITING : {
4580 assert(values_h->length() == 3 &&
4581 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4582 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4583 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4584 "Invalid threadStatus value");
4585 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4586 3, /* number of substates */
4587 CHECK_NULL);
4588 names_h = objArrayHandle(THREAD, r);
4589 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4590 CHECK_NULL);
4591 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4592 CHECK_NULL);
4593 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4594 CHECK_NULL);
4595 names_h->obj_at_put(0, name0());
4596 names_h->obj_at_put(1, name1());
4597 names_h->obj_at_put(2, name2());
4598 break;
4599 }
4600 case JAVA_THREAD_STATE_TERMINATED : {
4601 assert(values_h->length() == 1 &&
4602 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4603 "Invalid threadStatus value");
4604 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4605 1, /* only 1 substate */
4606 CHECK_NULL);
4607 names_h = objArrayHandle(THREAD, r);
4608 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4609 names_h->obj_at_put(0, name());
4610 break;
4611 }
4612 default:
4613 // Unknown state - probably incompatible JDK version
4614 return NULL;
4615 }
4616 return (jobjectArray) JNIHandles::make_local(env, names_h());
4617 }
4618 JVM_END
4620 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4621 {
4622 memset(info, 0, sizeof(info_size));
4624 info->jvm_version = Abstract_VM_Version::jvm_version();
4625 info->update_version = 0; /* 0 in HotSpot Express VM */
4626 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4628 // when we add a new capability in the jvm_version_info struct, we should also
4629 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4630 // counter defined in runtimeService.cpp.
4631 info->is_attachable = AttachListener::is_attach_supported();
4632 }
4633 JVM_END