Fri, 29 Mar 2013 20:52:01 -0700
Merge
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 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1076 objArrayOop signers = NULL;
1077 if (k->oop_is_instance()) {
1078 signers = InstanceKlass::cast(k)->signers();
1079 }
1081 // If there are no signers set in the class, or if the class
1082 // is an array, return NULL.
1083 if (signers == NULL) return NULL;
1085 // copy of the signers array
1086 Klass* element = ObjArrayKlass::cast(signers->klass())->element_klass();
1087 objArrayOop signers_copy = oopFactory::new_objArray(element, signers->length(), CHECK_NULL);
1088 for (int index = 0; index < signers->length(); index++) {
1089 signers_copy->obj_at_put(index, signers->obj_at(index));
1090 }
1092 // return the copy
1093 return (jobjectArray) JNIHandles::make_local(env, signers_copy);
1094 JVM_END
1097 JVM_ENTRY(void, JVM_SetClassSigners(JNIEnv *env, jclass cls, jobjectArray signers))
1098 JVMWrapper("JVM_SetClassSigners");
1099 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1100 // This call is ignored for primitive types and arrays.
1101 // Signers are only set once, ClassLoader.java, and thus shouldn't
1102 // be called with an array. Only the bootstrap loader creates arrays.
1103 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1104 if (k->oop_is_instance()) {
1105 InstanceKlass::cast(k)->set_signers(objArrayOop(JNIHandles::resolve(signers)));
1106 }
1107 }
1108 JVM_END
1111 JVM_ENTRY(jobject, JVM_GetProtectionDomain(JNIEnv *env, jclass cls))
1112 JVMWrapper("JVM_GetProtectionDomain");
1113 if (JNIHandles::resolve(cls) == NULL) {
1114 THROW_(vmSymbols::java_lang_NullPointerException(), NULL);
1115 }
1117 if (java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1118 // Primitive types does not have a protection domain.
1119 return NULL;
1120 }
1122 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1123 return (jobject) JNIHandles::make_local(env, k->protection_domain());
1124 JVM_END
1127 // Obsolete since 1.2 (Class.setProtectionDomain removed), although
1128 // still defined in core libraries as of 1.5.
1129 JVM_ENTRY(void, JVM_SetProtectionDomain(JNIEnv *env, jclass cls, jobject protection_domain))
1130 JVMWrapper("JVM_SetProtectionDomain");
1131 if (JNIHandles::resolve(cls) == NULL) {
1132 THROW(vmSymbols::java_lang_NullPointerException());
1133 }
1134 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1135 // Call is ignored for primitive types
1136 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1138 // cls won't be an array, as this called only from ClassLoader.defineClass
1139 if (k->oop_is_instance()) {
1140 oop pd = JNIHandles::resolve(protection_domain);
1141 assert(pd == NULL || pd->is_oop(), "just checking");
1142 InstanceKlass::cast(k)->set_protection_domain(pd);
1143 }
1144 }
1145 JVM_END
1148 JVM_ENTRY(jobject, JVM_DoPrivileged(JNIEnv *env, jclass cls, jobject action, jobject context, jboolean wrapException))
1149 JVMWrapper("JVM_DoPrivileged");
1151 if (action == NULL) {
1152 THROW_MSG_0(vmSymbols::java_lang_NullPointerException(), "Null action");
1153 }
1155 // Stack allocated list of privileged stack elements
1156 PrivilegedElement pi;
1158 // Check that action object understands "Object run()"
1159 Handle object (THREAD, JNIHandles::resolve(action));
1161 // get run() method
1162 Method* m_oop = object->klass()->uncached_lookup_method(
1163 vmSymbols::run_method_name(),
1164 vmSymbols::void_object_signature());
1165 methodHandle m (THREAD, m_oop);
1166 if (m.is_null() || !m->is_method() || !m()->is_public() || m()->is_static()) {
1167 THROW_MSG_0(vmSymbols::java_lang_InternalError(), "No run method");
1168 }
1170 // Compute the frame initiating the do privileged operation and setup the privileged stack
1171 vframeStream vfst(thread);
1172 vfst.security_get_caller_frame(1);
1174 if (!vfst.at_end()) {
1175 pi.initialize(&vfst, JNIHandles::resolve(context), thread->privileged_stack_top(), CHECK_NULL);
1176 thread->set_privileged_stack_top(&pi);
1177 }
1180 // invoke the Object run() in the action object. We cannot use call_interface here, since the static type
1181 // is not really known - it is either java.security.PrivilegedAction or java.security.PrivilegedExceptionAction
1182 Handle pending_exception;
1183 JavaValue result(T_OBJECT);
1184 JavaCallArguments args(object);
1185 JavaCalls::call(&result, m, &args, THREAD);
1187 // done with action, remove ourselves from the list
1188 if (!vfst.at_end()) {
1189 assert(thread->privileged_stack_top() != NULL && thread->privileged_stack_top() == &pi, "wrong top element");
1190 thread->set_privileged_stack_top(thread->privileged_stack_top()->next());
1191 }
1193 if (HAS_PENDING_EXCEPTION) {
1194 pending_exception = Handle(THREAD, PENDING_EXCEPTION);
1195 CLEAR_PENDING_EXCEPTION;
1197 if ( pending_exception->is_a(SystemDictionary::Exception_klass()) &&
1198 !pending_exception->is_a(SystemDictionary::RuntimeException_klass())) {
1199 // Throw a java.security.PrivilegedActionException(Exception e) exception
1200 JavaCallArguments args(pending_exception);
1201 THROW_ARG_0(vmSymbols::java_security_PrivilegedActionException(),
1202 vmSymbols::exception_void_signature(),
1203 &args);
1204 }
1205 }
1207 if (pending_exception.not_null()) THROW_OOP_0(pending_exception());
1208 return JNIHandles::make_local(env, (oop) result.get_jobject());
1209 JVM_END
1212 // Returns the inherited_access_control_context field of the running thread.
1213 JVM_ENTRY(jobject, JVM_GetInheritedAccessControlContext(JNIEnv *env, jclass cls))
1214 JVMWrapper("JVM_GetInheritedAccessControlContext");
1215 oop result = java_lang_Thread::inherited_access_control_context(thread->threadObj());
1216 return JNIHandles::make_local(env, result);
1217 JVM_END
1219 class RegisterArrayForGC {
1220 private:
1221 JavaThread *_thread;
1222 public:
1223 RegisterArrayForGC(JavaThread *thread, GrowableArray<oop>* array) {
1224 _thread = thread;
1225 _thread->register_array_for_gc(array);
1226 }
1228 ~RegisterArrayForGC() {
1229 _thread->register_array_for_gc(NULL);
1230 }
1231 };
1234 JVM_ENTRY(jobject, JVM_GetStackAccessControlContext(JNIEnv *env, jclass cls))
1235 JVMWrapper("JVM_GetStackAccessControlContext");
1236 if (!UsePrivilegedStack) return NULL;
1238 ResourceMark rm(THREAD);
1239 GrowableArray<oop>* local_array = new GrowableArray<oop>(12);
1240 JvmtiVMObjectAllocEventCollector oam;
1242 // count the protection domains on the execution stack. We collapse
1243 // duplicate consecutive protection domains into a single one, as
1244 // well as stopping when we hit a privileged frame.
1246 // Use vframeStream to iterate through Java frames
1247 vframeStream vfst(thread);
1249 oop previous_protection_domain = NULL;
1250 Handle privileged_context(thread, NULL);
1251 bool is_privileged = false;
1252 oop protection_domain = NULL;
1254 for(; !vfst.at_end(); vfst.next()) {
1255 // get method of frame
1256 Method* method = vfst.method();
1257 intptr_t* frame_id = vfst.frame_id();
1259 // check the privileged frames to see if we have a match
1260 if (thread->privileged_stack_top() && thread->privileged_stack_top()->frame_id() == frame_id) {
1261 // this frame is privileged
1262 is_privileged = true;
1263 privileged_context = Handle(thread, thread->privileged_stack_top()->privileged_context());
1264 protection_domain = thread->privileged_stack_top()->protection_domain();
1265 } else {
1266 protection_domain = method->method_holder()->protection_domain();
1267 }
1269 if ((previous_protection_domain != protection_domain) && (protection_domain != NULL)) {
1270 local_array->push(protection_domain);
1271 previous_protection_domain = protection_domain;
1272 }
1274 if (is_privileged) break;
1275 }
1278 // either all the domains on the stack were system domains, or
1279 // we had a privileged system domain
1280 if (local_array->is_empty()) {
1281 if (is_privileged && privileged_context.is_null()) return NULL;
1283 oop result = java_security_AccessControlContext::create(objArrayHandle(), is_privileged, privileged_context, CHECK_NULL);
1284 return JNIHandles::make_local(env, result);
1285 }
1287 // the resource area must be registered in case of a gc
1288 RegisterArrayForGC ragc(thread, local_array);
1289 objArrayOop context = oopFactory::new_objArray(SystemDictionary::ProtectionDomain_klass(),
1290 local_array->length(), CHECK_NULL);
1291 objArrayHandle h_context(thread, context);
1292 for (int index = 0; index < local_array->length(); index++) {
1293 h_context->obj_at_put(index, local_array->at(index));
1294 }
1296 oop result = java_security_AccessControlContext::create(h_context, is_privileged, privileged_context, CHECK_NULL);
1298 return JNIHandles::make_local(env, result);
1299 JVM_END
1302 JVM_QUICK_ENTRY(jboolean, JVM_IsArrayClass(JNIEnv *env, jclass cls))
1303 JVMWrapper("JVM_IsArrayClass");
1304 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1305 return (k != NULL) && k->oop_is_array() ? true : false;
1306 JVM_END
1309 JVM_QUICK_ENTRY(jboolean, JVM_IsPrimitiveClass(JNIEnv *env, jclass cls))
1310 JVMWrapper("JVM_IsPrimitiveClass");
1311 oop mirror = JNIHandles::resolve_non_null(cls);
1312 return (jboolean) java_lang_Class::is_primitive(mirror);
1313 JVM_END
1316 JVM_ENTRY(jclass, JVM_GetComponentType(JNIEnv *env, jclass cls))
1317 JVMWrapper("JVM_GetComponentType");
1318 oop mirror = JNIHandles::resolve_non_null(cls);
1319 oop result = Reflection::array_component_type(mirror, CHECK_NULL);
1320 return (jclass) JNIHandles::make_local(env, result);
1321 JVM_END
1324 JVM_ENTRY(jint, JVM_GetClassModifiers(JNIEnv *env, jclass cls))
1325 JVMWrapper("JVM_GetClassModifiers");
1326 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1327 // Primitive type
1328 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1329 }
1331 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1332 debug_only(int computed_modifiers = k->compute_modifier_flags(CHECK_0));
1333 assert(k->modifier_flags() == computed_modifiers, "modifiers cache is OK");
1334 return k->modifier_flags();
1335 JVM_END
1338 // Inner class reflection ///////////////////////////////////////////////////////////////////////////////
1340 JVM_ENTRY(jobjectArray, JVM_GetDeclaredClasses(JNIEnv *env, jclass ofClass))
1341 JvmtiVMObjectAllocEventCollector oam;
1342 // ofClass is a reference to a java_lang_Class object. The mirror object
1343 // of an InstanceKlass
1345 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1346 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1347 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1348 return (jobjectArray)JNIHandles::make_local(env, result);
1349 }
1351 instanceKlassHandle k(thread, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1352 InnerClassesIterator iter(k);
1354 if (iter.length() == 0) {
1355 // Neither an inner nor outer class
1356 oop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), 0, CHECK_NULL);
1357 return (jobjectArray)JNIHandles::make_local(env, result);
1358 }
1360 // find inner class info
1361 constantPoolHandle cp(thread, k->constants());
1362 int length = iter.length();
1364 // Allocate temp. result array
1365 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Class_klass(), length/4, CHECK_NULL);
1366 objArrayHandle result (THREAD, r);
1367 int members = 0;
1369 for (; !iter.done(); iter.next()) {
1370 int ioff = iter.inner_class_info_index();
1371 int ooff = iter.outer_class_info_index();
1373 if (ioff != 0 && ooff != 0) {
1374 // Check to see if the name matches the class we're looking for
1375 // before attempting to find the class.
1376 if (cp->klass_name_at_matches(k, ooff)) {
1377 Klass* outer_klass = cp->klass_at(ooff, CHECK_NULL);
1378 if (outer_klass == k()) {
1379 Klass* ik = cp->klass_at(ioff, CHECK_NULL);
1380 instanceKlassHandle inner_klass (THREAD, ik);
1382 // Throws an exception if outer klass has not declared k as
1383 // an inner klass
1384 Reflection::check_for_inner_class(k, inner_klass, true, CHECK_NULL);
1386 result->obj_at_put(members, inner_klass->java_mirror());
1387 members++;
1388 }
1389 }
1390 }
1391 }
1393 if (members != length) {
1394 // Return array of right length
1395 objArrayOop res = oopFactory::new_objArray(SystemDictionary::Class_klass(), members, CHECK_NULL);
1396 for(int i = 0; i < members; i++) {
1397 res->obj_at_put(i, result->obj_at(i));
1398 }
1399 return (jobjectArray)JNIHandles::make_local(env, res);
1400 }
1402 return (jobjectArray)JNIHandles::make_local(env, result());
1403 JVM_END
1406 JVM_ENTRY(jclass, JVM_GetDeclaringClass(JNIEnv *env, jclass ofClass))
1407 {
1408 // ofClass is a reference to a java_lang_Class object.
1409 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1410 ! java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_instance()) {
1411 return NULL;
1412 }
1414 bool inner_is_member = false;
1415 Klass* outer_klass
1416 = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))
1417 )->compute_enclosing_class(&inner_is_member, CHECK_NULL);
1418 if (outer_klass == NULL) return NULL; // already a top-level class
1419 if (!inner_is_member) return NULL; // an anonymous class (inside a method)
1420 return (jclass) JNIHandles::make_local(env, outer_klass->java_mirror());
1421 }
1422 JVM_END
1424 // should be in InstanceKlass.cpp, but is here for historical reasons
1425 Klass* InstanceKlass::compute_enclosing_class_impl(instanceKlassHandle k,
1426 bool* inner_is_member,
1427 TRAPS) {
1428 Thread* thread = THREAD;
1429 InnerClassesIterator iter(k);
1430 if (iter.length() == 0) {
1431 // No inner class info => no declaring class
1432 return NULL;
1433 }
1435 constantPoolHandle i_cp(thread, k->constants());
1437 bool found = false;
1438 Klass* ok;
1439 instanceKlassHandle outer_klass;
1440 *inner_is_member = false;
1442 // Find inner_klass attribute
1443 for (; !iter.done() && !found; iter.next()) {
1444 int ioff = iter.inner_class_info_index();
1445 int ooff = iter.outer_class_info_index();
1446 int noff = iter.inner_name_index();
1447 if (ioff != 0) {
1448 // Check to see if the name matches the class we're looking for
1449 // before attempting to find the class.
1450 if (i_cp->klass_name_at_matches(k, ioff)) {
1451 Klass* inner_klass = i_cp->klass_at(ioff, CHECK_NULL);
1452 found = (k() == inner_klass);
1453 if (found && ooff != 0) {
1454 ok = i_cp->klass_at(ooff, CHECK_NULL);
1455 outer_klass = instanceKlassHandle(thread, ok);
1456 *inner_is_member = true;
1457 }
1458 }
1459 }
1460 }
1462 if (found && outer_klass.is_null()) {
1463 // It may be anonymous; try for that.
1464 int encl_method_class_idx = k->enclosing_method_class_index();
1465 if (encl_method_class_idx != 0) {
1466 ok = i_cp->klass_at(encl_method_class_idx, CHECK_NULL);
1467 outer_klass = instanceKlassHandle(thread, ok);
1468 *inner_is_member = false;
1469 }
1470 }
1472 // If no inner class attribute found for this class.
1473 if (outer_klass.is_null()) return NULL;
1475 // Throws an exception if outer klass has not declared k as an inner klass
1476 // We need evidence that each klass knows about the other, or else
1477 // the system could allow a spoof of an inner class to gain access rights.
1478 Reflection::check_for_inner_class(outer_klass, k, *inner_is_member, CHECK_NULL);
1479 return outer_klass();
1480 }
1482 JVM_ENTRY(jstring, JVM_GetClassSignature(JNIEnv *env, jclass cls))
1483 assert (cls != NULL, "illegal class");
1484 JVMWrapper("JVM_GetClassSignature");
1485 JvmtiVMObjectAllocEventCollector oam;
1486 ResourceMark rm(THREAD);
1487 // Return null for arrays and primatives
1488 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1489 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1490 if (k->oop_is_instance()) {
1491 Symbol* sym = InstanceKlass::cast(k)->generic_signature();
1492 if (sym == NULL) return NULL;
1493 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
1494 return (jstring) JNIHandles::make_local(env, str());
1495 }
1496 }
1497 return NULL;
1498 JVM_END
1501 JVM_ENTRY(jbyteArray, JVM_GetClassAnnotations(JNIEnv *env, jclass cls))
1502 assert (cls != NULL, "illegal class");
1503 JVMWrapper("JVM_GetClassAnnotations");
1505 // Return null for arrays and primitives
1506 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1507 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1508 if (k->oop_is_instance()) {
1509 typeArrayOop a = Annotations::make_java_array(InstanceKlass::cast(k)->class_annotations(), CHECK_NULL);
1510 return (jbyteArray) JNIHandles::make_local(env, a);
1511 }
1512 }
1513 return NULL;
1514 JVM_END
1517 static bool jvm_get_field_common(jobject field, fieldDescriptor& fd, TRAPS) {
1518 // some of this code was adapted from from jni_FromReflectedField
1520 oop reflected = JNIHandles::resolve_non_null(field);
1521 oop mirror = java_lang_reflect_Field::clazz(reflected);
1522 Klass* k = java_lang_Class::as_Klass(mirror);
1523 int slot = java_lang_reflect_Field::slot(reflected);
1524 int modifiers = java_lang_reflect_Field::modifiers(reflected);
1526 KlassHandle kh(THREAD, k);
1527 intptr_t offset = InstanceKlass::cast(kh())->field_offset(slot);
1529 if (modifiers & JVM_ACC_STATIC) {
1530 // for static fields we only look in the current class
1531 if (!InstanceKlass::cast(kh())->find_local_field_from_offset(offset, true, &fd)) {
1532 assert(false, "cannot find static field");
1533 return false;
1534 }
1535 } else {
1536 // for instance fields we start with the current class and work
1537 // our way up through the superclass chain
1538 if (!InstanceKlass::cast(kh())->find_field_from_offset(offset, false, &fd)) {
1539 assert(false, "cannot find instance field");
1540 return false;
1541 }
1542 }
1543 return true;
1544 }
1546 JVM_ENTRY(jbyteArray, JVM_GetFieldAnnotations(JNIEnv *env, jobject field))
1547 // field is a handle to a java.lang.reflect.Field object
1548 assert(field != NULL, "illegal field");
1549 JVMWrapper("JVM_GetFieldAnnotations");
1551 fieldDescriptor fd;
1552 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1553 if (!gotFd) {
1554 return NULL;
1555 }
1557 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.annotations(), THREAD));
1558 JVM_END
1561 static Method* jvm_get_method_common(jobject method) {
1562 // some of this code was adapted from from jni_FromReflectedMethod
1564 oop reflected = JNIHandles::resolve_non_null(method);
1565 oop mirror = NULL;
1566 int slot = 0;
1568 if (reflected->klass() == SystemDictionary::reflect_Constructor_klass()) {
1569 mirror = java_lang_reflect_Constructor::clazz(reflected);
1570 slot = java_lang_reflect_Constructor::slot(reflected);
1571 } else {
1572 assert(reflected->klass() == SystemDictionary::reflect_Method_klass(),
1573 "wrong type");
1574 mirror = java_lang_reflect_Method::clazz(reflected);
1575 slot = java_lang_reflect_Method::slot(reflected);
1576 }
1577 Klass* k = java_lang_Class::as_Klass(mirror);
1579 Method* m = InstanceKlass::cast(k)->method_with_idnum(slot);
1580 assert(m != NULL, "cannot find method");
1581 return m; // caller has to deal with NULL in product mode
1582 }
1585 JVM_ENTRY(jbyteArray, JVM_GetMethodAnnotations(JNIEnv *env, jobject method))
1586 JVMWrapper("JVM_GetMethodAnnotations");
1588 // method is a handle to a java.lang.reflect.Method object
1589 Method* m = jvm_get_method_common(method);
1590 if (m == NULL) {
1591 return NULL;
1592 }
1594 return (jbyteArray) JNIHandles::make_local(env,
1595 Annotations::make_java_array(m->annotations(), THREAD));
1596 JVM_END
1599 JVM_ENTRY(jbyteArray, JVM_GetMethodDefaultAnnotationValue(JNIEnv *env, jobject method))
1600 JVMWrapper("JVM_GetMethodDefaultAnnotationValue");
1602 // method is a handle to a java.lang.reflect.Method object
1603 Method* m = jvm_get_method_common(method);
1604 if (m == NULL) {
1605 return NULL;
1606 }
1608 return (jbyteArray) JNIHandles::make_local(env,
1609 Annotations::make_java_array(m->annotation_default(), THREAD));
1610 JVM_END
1613 JVM_ENTRY(jbyteArray, JVM_GetMethodParameterAnnotations(JNIEnv *env, jobject method))
1614 JVMWrapper("JVM_GetMethodParameterAnnotations");
1616 // method is a handle to a java.lang.reflect.Method object
1617 Method* m = jvm_get_method_common(method);
1618 if (m == NULL) {
1619 return NULL;
1620 }
1622 return (jbyteArray) JNIHandles::make_local(env,
1623 Annotations::make_java_array(m->parameter_annotations(), THREAD));
1624 JVM_END
1626 /* Type use annotations support (JDK 1.8) */
1628 JVM_ENTRY(jbyteArray, JVM_GetClassTypeAnnotations(JNIEnv *env, jclass cls))
1629 assert (cls != NULL, "illegal class");
1630 JVMWrapper("JVM_GetClassTypeAnnotations");
1631 ResourceMark rm(THREAD);
1632 // Return null for arrays and primitives
1633 if (!java_lang_Class::is_primitive(JNIHandles::resolve(cls))) {
1634 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve(cls));
1635 if (k->oop_is_instance()) {
1636 AnnotationArray* type_annotations = InstanceKlass::cast(k)->class_type_annotations();
1637 if (type_annotations != NULL) {
1638 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1639 return (jbyteArray) JNIHandles::make_local(env, a);
1640 }
1641 }
1642 }
1643 return NULL;
1644 JVM_END
1646 JVM_ENTRY(jbyteArray, JVM_GetMethodTypeAnnotations(JNIEnv *env, jobject method))
1647 assert (method != NULL, "illegal method");
1648 JVMWrapper("JVM_GetMethodTypeAnnotations");
1650 // method is a handle to a java.lang.reflect.Method object
1651 Method* m = jvm_get_method_common(method);
1652 if (m == NULL) {
1653 return NULL;
1654 }
1656 AnnotationArray* type_annotations = m->type_annotations();
1657 if (type_annotations != NULL) {
1658 typeArrayOop a = Annotations::make_java_array(type_annotations, CHECK_NULL);
1659 return (jbyteArray) JNIHandles::make_local(env, a);
1660 }
1662 return NULL;
1663 JVM_END
1665 JVM_ENTRY(jbyteArray, JVM_GetFieldTypeAnnotations(JNIEnv *env, jobject field))
1666 assert (field != NULL, "illegal field");
1667 JVMWrapper("JVM_GetFieldTypeAnnotations");
1669 fieldDescriptor fd;
1670 bool gotFd = jvm_get_field_common(field, fd, CHECK_NULL);
1671 if (!gotFd) {
1672 return NULL;
1673 }
1675 return (jbyteArray) JNIHandles::make_local(env, Annotations::make_java_array(fd.type_annotations(), THREAD));
1676 JVM_END
1678 static void bounds_check(constantPoolHandle cp, jint index, TRAPS) {
1679 if (!cp->is_within_bounds(index)) {
1680 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "Constant pool index out of bounds");
1681 }
1682 }
1684 JVM_ENTRY(jobjectArray, JVM_GetMethodParameters(JNIEnv *env, jobject method))
1685 {
1686 JVMWrapper("JVM_GetMethodParameters");
1687 // method is a handle to a java.lang.reflect.Method object
1688 Method* method_ptr = jvm_get_method_common(method);
1689 methodHandle mh (THREAD, method_ptr);
1690 Handle reflected_method (THREAD, JNIHandles::resolve_non_null(method));
1691 const int num_params = mh->method_parameters_length();
1693 if (0 != num_params) {
1694 // make sure all the symbols are properly formatted
1695 for (int i = 0; i < num_params; i++) {
1696 MethodParametersElement* params = mh->method_parameters_start();
1697 int index = params[i].name_cp_index;
1698 bounds_check(mh->constants(), index, CHECK_NULL);
1700 if (0 != index && !mh->constants()->tag_at(index).is_utf8()) {
1701 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
1702 "Wrong type at constant pool index");
1703 }
1705 }
1707 objArrayOop result_oop = oopFactory::new_objArray(SystemDictionary::reflect_Parameter_klass(), num_params, CHECK_NULL);
1708 objArrayHandle result (THREAD, result_oop);
1710 for (int i = 0; i < num_params; i++) {
1711 MethodParametersElement* params = mh->method_parameters_start();
1712 // For a 0 index, give a NULL symbol
1713 Symbol* const sym = 0 != params[i].name_cp_index ?
1714 mh->constants()->symbol_at(params[i].name_cp_index) : NULL;
1715 int flags = params[i].flags;
1716 oop param = Reflection::new_parameter(reflected_method, i, sym,
1717 flags, CHECK_NULL);
1718 result->obj_at_put(i, param);
1719 }
1720 return (jobjectArray)JNIHandles::make_local(env, result());
1721 } else {
1722 return (jobjectArray)NULL;
1723 }
1724 }
1725 JVM_END
1727 // New (JDK 1.4) reflection implementation /////////////////////////////////////
1729 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredFields(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1730 {
1731 JVMWrapper("JVM_GetClassDeclaredFields");
1732 JvmtiVMObjectAllocEventCollector oam;
1734 // Exclude primitive types and array types
1735 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass)) ||
1736 java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1737 // Return empty array
1738 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), 0, CHECK_NULL);
1739 return (jobjectArray) JNIHandles::make_local(env, res);
1740 }
1742 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1743 constantPoolHandle cp(THREAD, k->constants());
1745 // Ensure class is linked
1746 k->link_class(CHECK_NULL);
1748 // 4496456 We need to filter out java.lang.Throwable.backtrace
1749 bool skip_backtrace = false;
1751 // Allocate result
1752 int num_fields;
1754 if (publicOnly) {
1755 num_fields = 0;
1756 for (JavaFieldStream fs(k()); !fs.done(); fs.next()) {
1757 if (fs.access_flags().is_public()) ++num_fields;
1758 }
1759 } else {
1760 num_fields = k->java_fields_count();
1762 if (k() == SystemDictionary::Throwable_klass()) {
1763 num_fields--;
1764 skip_backtrace = true;
1765 }
1766 }
1768 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Field_klass(), num_fields, CHECK_NULL);
1769 objArrayHandle result (THREAD, r);
1771 int out_idx = 0;
1772 fieldDescriptor fd;
1773 for (JavaFieldStream fs(k); !fs.done(); fs.next()) {
1774 if (skip_backtrace) {
1775 // 4496456 skip java.lang.Throwable.backtrace
1776 int offset = fs.offset();
1777 if (offset == java_lang_Throwable::get_backtrace_offset()) continue;
1778 }
1780 if (!publicOnly || fs.access_flags().is_public()) {
1781 fd.initialize(k(), fs.index());
1782 oop field = Reflection::new_field(&fd, UseNewReflection, CHECK_NULL);
1783 result->obj_at_put(out_idx, field);
1784 ++out_idx;
1785 }
1786 }
1787 assert(out_idx == num_fields, "just checking");
1788 return (jobjectArray) JNIHandles::make_local(env, result());
1789 }
1790 JVM_END
1792 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredMethods(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1793 {
1794 JVMWrapper("JVM_GetClassDeclaredMethods");
1795 JvmtiVMObjectAllocEventCollector oam;
1797 // Exclude primitive types and array types
1798 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1799 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1800 // Return empty array
1801 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), 0, CHECK_NULL);
1802 return (jobjectArray) JNIHandles::make_local(env, res);
1803 }
1805 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1807 // Ensure class is linked
1808 k->link_class(CHECK_NULL);
1810 Array<Method*>* methods = k->methods();
1811 int methods_length = methods->length();
1812 int num_methods = 0;
1814 int i;
1815 for (i = 0; i < methods_length; i++) {
1816 methodHandle method(THREAD, methods->at(i));
1817 if (!method->is_initializer() && !method->is_overpass()) {
1818 if (!publicOnly || method->is_public()) {
1819 ++num_methods;
1820 }
1821 }
1822 }
1824 // Allocate result
1825 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Method_klass(), num_methods, CHECK_NULL);
1826 objArrayHandle result (THREAD, r);
1828 int out_idx = 0;
1829 for (i = 0; i < methods_length; i++) {
1830 methodHandle method(THREAD, methods->at(i));
1831 if (!method->is_initializer() && !method->is_overpass()) {
1832 if (!publicOnly || method->is_public()) {
1833 oop m = Reflection::new_method(method, UseNewReflection, false, CHECK_NULL);
1834 result->obj_at_put(out_idx, m);
1835 ++out_idx;
1836 }
1837 }
1838 }
1839 assert(out_idx == num_methods, "just checking");
1840 return (jobjectArray) JNIHandles::make_local(env, result());
1841 }
1842 JVM_END
1844 JVM_ENTRY(jobjectArray, JVM_GetClassDeclaredConstructors(JNIEnv *env, jclass ofClass, jboolean publicOnly))
1845 {
1846 JVMWrapper("JVM_GetClassDeclaredConstructors");
1847 JvmtiVMObjectAllocEventCollector oam;
1849 // Exclude primitive types and array types
1850 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(ofClass))
1851 || java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass))->oop_is_array()) {
1852 // Return empty array
1853 oop res = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), 0 , CHECK_NULL);
1854 return (jobjectArray) JNIHandles::make_local(env, res);
1855 }
1857 instanceKlassHandle k(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(ofClass)));
1859 // Ensure class is linked
1860 k->link_class(CHECK_NULL);
1862 Array<Method*>* methods = k->methods();
1863 int methods_length = methods->length();
1864 int num_constructors = 0;
1866 int i;
1867 for (i = 0; i < methods_length; i++) {
1868 methodHandle method(THREAD, methods->at(i));
1869 if (method->is_initializer() && !method->is_static()) {
1870 if (!publicOnly || method->is_public()) {
1871 ++num_constructors;
1872 }
1873 }
1874 }
1876 // Allocate result
1877 objArrayOop r = oopFactory::new_objArray(SystemDictionary::reflect_Constructor_klass(), num_constructors, CHECK_NULL);
1878 objArrayHandle result(THREAD, r);
1880 int out_idx = 0;
1881 for (i = 0; i < methods_length; i++) {
1882 methodHandle method(THREAD, methods->at(i));
1883 if (method->is_initializer() && !method->is_static()) {
1884 if (!publicOnly || method->is_public()) {
1885 oop m = Reflection::new_constructor(method, CHECK_NULL);
1886 result->obj_at_put(out_idx, m);
1887 ++out_idx;
1888 }
1889 }
1890 }
1891 assert(out_idx == num_constructors, "just checking");
1892 return (jobjectArray) JNIHandles::make_local(env, result());
1893 }
1894 JVM_END
1896 JVM_ENTRY(jint, JVM_GetClassAccessFlags(JNIEnv *env, jclass cls))
1897 {
1898 JVMWrapper("JVM_GetClassAccessFlags");
1899 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1900 // Primitive type
1901 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
1902 }
1904 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1905 return k->access_flags().as_int() & JVM_ACC_WRITTEN_FLAGS;
1906 }
1907 JVM_END
1910 // Constant pool access //////////////////////////////////////////////////////////
1912 JVM_ENTRY(jobject, JVM_GetClassConstantPool(JNIEnv *env, jclass cls))
1913 {
1914 JVMWrapper("JVM_GetClassConstantPool");
1915 JvmtiVMObjectAllocEventCollector oam;
1917 // Return null for primitives and arrays
1918 if (!java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) {
1919 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
1920 if (k->oop_is_instance()) {
1921 instanceKlassHandle k_h(THREAD, k);
1922 Handle jcp = sun_reflect_ConstantPool::create(CHECK_NULL);
1923 sun_reflect_ConstantPool::set_cp(jcp(), k_h->constants());
1924 return JNIHandles::make_local(jcp());
1925 }
1926 }
1927 return NULL;
1928 }
1929 JVM_END
1932 JVM_ENTRY(jint, JVM_ConstantPoolGetSize(JNIEnv *env, jobject obj, jobject unused))
1933 {
1934 JVMWrapper("JVM_ConstantPoolGetSize");
1935 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1936 return cp->length();
1937 }
1938 JVM_END
1941 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAt(JNIEnv *env, jobject obj, jobject unused, jint index))
1942 {
1943 JVMWrapper("JVM_ConstantPoolGetClassAt");
1944 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1945 bounds_check(cp, index, CHECK_NULL);
1946 constantTag tag = cp->tag_at(index);
1947 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1948 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1949 }
1950 Klass* k = cp->klass_at(index, CHECK_NULL);
1951 return (jclass) JNIHandles::make_local(k->java_mirror());
1952 }
1953 JVM_END
1955 JVM_ENTRY(jclass, JVM_ConstantPoolGetClassAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
1956 {
1957 JVMWrapper("JVM_ConstantPoolGetClassAtIfLoaded");
1958 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
1959 bounds_check(cp, index, CHECK_NULL);
1960 constantTag tag = cp->tag_at(index);
1961 if (!tag.is_klass() && !tag.is_unresolved_klass()) {
1962 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1963 }
1964 Klass* k = ConstantPool::klass_at_if_loaded(cp, index);
1965 if (k == NULL) return NULL;
1966 return (jclass) JNIHandles::make_local(k->java_mirror());
1967 }
1968 JVM_END
1970 static jobject get_method_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
1971 constantTag tag = cp->tag_at(index);
1972 if (!tag.is_method() && !tag.is_interface_method()) {
1973 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
1974 }
1975 int klass_ref = cp->uncached_klass_ref_index_at(index);
1976 Klass* k_o;
1977 if (force_resolution) {
1978 k_o = cp->klass_at(klass_ref, CHECK_NULL);
1979 } else {
1980 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
1981 if (k_o == NULL) return NULL;
1982 }
1983 instanceKlassHandle k(THREAD, k_o);
1984 Symbol* name = cp->uncached_name_ref_at(index);
1985 Symbol* sig = cp->uncached_signature_ref_at(index);
1986 methodHandle m (THREAD, k->find_method(name, sig));
1987 if (m.is_null()) {
1988 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up method in target class");
1989 }
1990 oop method;
1991 if (!m->is_initializer() || m->is_static()) {
1992 method = Reflection::new_method(m, true, true, CHECK_NULL);
1993 } else {
1994 method = Reflection::new_constructor(m, CHECK_NULL);
1995 }
1996 return JNIHandles::make_local(method);
1997 }
1999 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2000 {
2001 JVMWrapper("JVM_ConstantPoolGetMethodAt");
2002 JvmtiVMObjectAllocEventCollector oam;
2003 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2004 bounds_check(cp, index, CHECK_NULL);
2005 jobject res = get_method_at_helper(cp, index, true, CHECK_NULL);
2006 return res;
2007 }
2008 JVM_END
2010 JVM_ENTRY(jobject, JVM_ConstantPoolGetMethodAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2011 {
2012 JVMWrapper("JVM_ConstantPoolGetMethodAtIfLoaded");
2013 JvmtiVMObjectAllocEventCollector oam;
2014 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2015 bounds_check(cp, index, CHECK_NULL);
2016 jobject res = get_method_at_helper(cp, index, false, CHECK_NULL);
2017 return res;
2018 }
2019 JVM_END
2021 static jobject get_field_at_helper(constantPoolHandle cp, jint index, bool force_resolution, TRAPS) {
2022 constantTag tag = cp->tag_at(index);
2023 if (!tag.is_field()) {
2024 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2025 }
2026 int klass_ref = cp->uncached_klass_ref_index_at(index);
2027 Klass* k_o;
2028 if (force_resolution) {
2029 k_o = cp->klass_at(klass_ref, CHECK_NULL);
2030 } else {
2031 k_o = ConstantPool::klass_at_if_loaded(cp, klass_ref);
2032 if (k_o == NULL) return NULL;
2033 }
2034 instanceKlassHandle k(THREAD, k_o);
2035 Symbol* name = cp->uncached_name_ref_at(index);
2036 Symbol* sig = cp->uncached_signature_ref_at(index);
2037 fieldDescriptor fd;
2038 Klass* target_klass = k->find_field(name, sig, &fd);
2039 if (target_klass == NULL) {
2040 THROW_MSG_0(vmSymbols::java_lang_RuntimeException(), "Unable to look up field in target class");
2041 }
2042 oop field = Reflection::new_field(&fd, true, CHECK_NULL);
2043 return JNIHandles::make_local(field);
2044 }
2046 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAt(JNIEnv *env, jobject obj, jobject unusedl, jint index))
2047 {
2048 JVMWrapper("JVM_ConstantPoolGetFieldAt");
2049 JvmtiVMObjectAllocEventCollector oam;
2050 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2051 bounds_check(cp, index, CHECK_NULL);
2052 jobject res = get_field_at_helper(cp, index, true, CHECK_NULL);
2053 return res;
2054 }
2055 JVM_END
2057 JVM_ENTRY(jobject, JVM_ConstantPoolGetFieldAtIfLoaded(JNIEnv *env, jobject obj, jobject unused, jint index))
2058 {
2059 JVMWrapper("JVM_ConstantPoolGetFieldAtIfLoaded");
2060 JvmtiVMObjectAllocEventCollector oam;
2061 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2062 bounds_check(cp, index, CHECK_NULL);
2063 jobject res = get_field_at_helper(cp, index, false, CHECK_NULL);
2064 return res;
2065 }
2066 JVM_END
2068 JVM_ENTRY(jobjectArray, JVM_ConstantPoolGetMemberRefInfoAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2069 {
2070 JVMWrapper("JVM_ConstantPoolGetMemberRefInfoAt");
2071 JvmtiVMObjectAllocEventCollector oam;
2072 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2073 bounds_check(cp, index, CHECK_NULL);
2074 constantTag tag = cp->tag_at(index);
2075 if (!tag.is_field_or_method()) {
2076 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2077 }
2078 int klass_ref = cp->uncached_klass_ref_index_at(index);
2079 Symbol* klass_name = cp->klass_name_at(klass_ref);
2080 Symbol* member_name = cp->uncached_name_ref_at(index);
2081 Symbol* member_sig = cp->uncached_signature_ref_at(index);
2082 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::String_klass(), 3, CHECK_NULL);
2083 objArrayHandle dest(THREAD, dest_o);
2084 Handle str = java_lang_String::create_from_symbol(klass_name, CHECK_NULL);
2085 dest->obj_at_put(0, str());
2086 str = java_lang_String::create_from_symbol(member_name, CHECK_NULL);
2087 dest->obj_at_put(1, str());
2088 str = java_lang_String::create_from_symbol(member_sig, CHECK_NULL);
2089 dest->obj_at_put(2, str());
2090 return (jobjectArray) JNIHandles::make_local(dest());
2091 }
2092 JVM_END
2094 JVM_ENTRY(jint, JVM_ConstantPoolGetIntAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2095 {
2096 JVMWrapper("JVM_ConstantPoolGetIntAt");
2097 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2098 bounds_check(cp, index, CHECK_0);
2099 constantTag tag = cp->tag_at(index);
2100 if (!tag.is_int()) {
2101 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2102 }
2103 return cp->int_at(index);
2104 }
2105 JVM_END
2107 JVM_ENTRY(jlong, JVM_ConstantPoolGetLongAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2108 {
2109 JVMWrapper("JVM_ConstantPoolGetLongAt");
2110 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2111 bounds_check(cp, index, CHECK_(0L));
2112 constantTag tag = cp->tag_at(index);
2113 if (!tag.is_long()) {
2114 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2115 }
2116 return cp->long_at(index);
2117 }
2118 JVM_END
2120 JVM_ENTRY(jfloat, JVM_ConstantPoolGetFloatAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2121 {
2122 JVMWrapper("JVM_ConstantPoolGetFloatAt");
2123 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2124 bounds_check(cp, index, CHECK_(0.0f));
2125 constantTag tag = cp->tag_at(index);
2126 if (!tag.is_float()) {
2127 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2128 }
2129 return cp->float_at(index);
2130 }
2131 JVM_END
2133 JVM_ENTRY(jdouble, JVM_ConstantPoolGetDoubleAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2134 {
2135 JVMWrapper("JVM_ConstantPoolGetDoubleAt");
2136 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2137 bounds_check(cp, index, CHECK_(0.0));
2138 constantTag tag = cp->tag_at(index);
2139 if (!tag.is_double()) {
2140 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2141 }
2142 return cp->double_at(index);
2143 }
2144 JVM_END
2146 JVM_ENTRY(jstring, JVM_ConstantPoolGetStringAt(JNIEnv *env, jobject obj, jobject unused, jint index))
2147 {
2148 JVMWrapper("JVM_ConstantPoolGetStringAt");
2149 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2150 bounds_check(cp, index, CHECK_NULL);
2151 constantTag tag = cp->tag_at(index);
2152 if (!tag.is_string()) {
2153 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2154 }
2155 oop str = cp->string_at(index, CHECK_NULL);
2156 return (jstring) JNIHandles::make_local(str);
2157 }
2158 JVM_END
2160 JVM_ENTRY(jstring, JVM_ConstantPoolGetUTF8At(JNIEnv *env, jobject obj, jobject unused, jint index))
2161 {
2162 JVMWrapper("JVM_ConstantPoolGetUTF8At");
2163 JvmtiVMObjectAllocEventCollector oam;
2164 constantPoolHandle cp = constantPoolHandle(THREAD, sun_reflect_ConstantPool::get_cp(JNIHandles::resolve_non_null(obj)));
2165 bounds_check(cp, index, CHECK_NULL);
2166 constantTag tag = cp->tag_at(index);
2167 if (!tag.is_symbol()) {
2168 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Wrong type at constant pool index");
2169 }
2170 Symbol* sym = cp->symbol_at(index);
2171 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
2172 return (jstring) JNIHandles::make_local(str());
2173 }
2174 JVM_END
2177 // Assertion support. //////////////////////////////////////////////////////////
2179 JVM_ENTRY(jboolean, JVM_DesiredAssertionStatus(JNIEnv *env, jclass unused, jclass cls))
2180 JVMWrapper("JVM_DesiredAssertionStatus");
2181 assert(cls != NULL, "bad class");
2183 oop r = JNIHandles::resolve(cls);
2184 assert(! java_lang_Class::is_primitive(r), "primitive classes not allowed");
2185 if (java_lang_Class::is_primitive(r)) return false;
2187 Klass* k = java_lang_Class::as_Klass(r);
2188 assert(k->oop_is_instance(), "must be an instance klass");
2189 if (! k->oop_is_instance()) return false;
2191 ResourceMark rm(THREAD);
2192 const char* name = k->name()->as_C_string();
2193 bool system_class = k->class_loader() == NULL;
2194 return JavaAssertions::enabled(name, system_class);
2196 JVM_END
2199 // Return a new AssertionStatusDirectives object with the fields filled in with
2200 // command-line assertion arguments (i.e., -ea, -da).
2201 JVM_ENTRY(jobject, JVM_AssertionStatusDirectives(JNIEnv *env, jclass unused))
2202 JVMWrapper("JVM_AssertionStatusDirectives");
2203 JvmtiVMObjectAllocEventCollector oam;
2204 oop asd = JavaAssertions::createAssertionStatusDirectives(CHECK_NULL);
2205 return JNIHandles::make_local(env, asd);
2206 JVM_END
2208 // Verification ////////////////////////////////////////////////////////////////////////////////
2210 // Reflection for the verifier /////////////////////////////////////////////////////////////////
2212 // RedefineClasses support: bug 6214132 caused verification to fail.
2213 // All functions from this section should call the jvmtiThreadSate function:
2214 // Klass* class_to_verify_considering_redefinition(Klass* klass).
2215 // The function returns a Klass* of the _scratch_class if the verifier
2216 // was invoked in the middle of the class redefinition.
2217 // Otherwise it returns its argument value which is the _the_class Klass*.
2218 // Please, refer to the description in the jvmtiThreadSate.hpp.
2220 JVM_ENTRY(const char*, JVM_GetClassNameUTF(JNIEnv *env, jclass cls))
2221 JVMWrapper("JVM_GetClassNameUTF");
2222 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2223 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2224 return k->name()->as_utf8();
2225 JVM_END
2228 JVM_QUICK_ENTRY(void, JVM_GetClassCPTypes(JNIEnv *env, jclass cls, unsigned char *types))
2229 JVMWrapper("JVM_GetClassCPTypes");
2230 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2231 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2232 // types will have length zero if this is not an InstanceKlass
2233 // (length is determined by call to JVM_GetClassCPEntriesCount)
2234 if (k->oop_is_instance()) {
2235 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2236 for (int index = cp->length() - 1; index >= 0; index--) {
2237 constantTag tag = cp->tag_at(index);
2238 types[index] = (tag.is_unresolved_klass()) ? JVM_CONSTANT_Class : tag.value();
2239 }
2240 }
2241 JVM_END
2244 JVM_QUICK_ENTRY(jint, JVM_GetClassCPEntriesCount(JNIEnv *env, jclass cls))
2245 JVMWrapper("JVM_GetClassCPEntriesCount");
2246 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2247 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2248 if (!k->oop_is_instance())
2249 return 0;
2250 return InstanceKlass::cast(k)->constants()->length();
2251 JVM_END
2254 JVM_QUICK_ENTRY(jint, JVM_GetClassFieldsCount(JNIEnv *env, jclass cls))
2255 JVMWrapper("JVM_GetClassFieldsCount");
2256 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2257 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2258 if (!k->oop_is_instance())
2259 return 0;
2260 return InstanceKlass::cast(k)->java_fields_count();
2261 JVM_END
2264 JVM_QUICK_ENTRY(jint, JVM_GetClassMethodsCount(JNIEnv *env, jclass cls))
2265 JVMWrapper("JVM_GetClassMethodsCount");
2266 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2267 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2268 if (!k->oop_is_instance())
2269 return 0;
2270 return InstanceKlass::cast(k)->methods()->length();
2271 JVM_END
2274 // The following methods, used for the verifier, are never called with
2275 // array klasses, so a direct cast to InstanceKlass is safe.
2276 // Typically, these methods are called in a loop with bounds determined
2277 // by the results of JVM_GetClass{Fields,Methods}Count, which return
2278 // zero for arrays.
2279 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionIndexes(JNIEnv *env, jclass cls, jint method_index, unsigned short *exceptions))
2280 JVMWrapper("JVM_GetMethodIxExceptionIndexes");
2281 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2282 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2283 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2284 int length = method->checked_exceptions_length();
2285 if (length > 0) {
2286 CheckedExceptionElement* table= method->checked_exceptions_start();
2287 for (int i = 0; i < length; i++) {
2288 exceptions[i] = table[i].class_cp_index;
2289 }
2290 }
2291 JVM_END
2294 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionsCount(JNIEnv *env, jclass cls, jint method_index))
2295 JVMWrapper("JVM_GetMethodIxExceptionsCount");
2296 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2297 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2298 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2299 return method->checked_exceptions_length();
2300 JVM_END
2303 JVM_QUICK_ENTRY(void, JVM_GetMethodIxByteCode(JNIEnv *env, jclass cls, jint method_index, unsigned char *code))
2304 JVMWrapper("JVM_GetMethodIxByteCode");
2305 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2306 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2307 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2308 memcpy(code, method->code_base(), method->code_size());
2309 JVM_END
2312 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxByteCodeLength(JNIEnv *env, jclass cls, jint method_index))
2313 JVMWrapper("JVM_GetMethodIxByteCodeLength");
2314 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2315 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2316 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2317 return method->code_size();
2318 JVM_END
2321 JVM_QUICK_ENTRY(void, JVM_GetMethodIxExceptionTableEntry(JNIEnv *env, jclass cls, jint method_index, jint entry_index, JVM_ExceptionTableEntryType *entry))
2322 JVMWrapper("JVM_GetMethodIxExceptionTableEntry");
2323 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2324 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2325 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2326 ExceptionTable extable(method);
2327 entry->start_pc = extable.start_pc(entry_index);
2328 entry->end_pc = extable.end_pc(entry_index);
2329 entry->handler_pc = extable.handler_pc(entry_index);
2330 entry->catchType = extable.catch_type_index(entry_index);
2331 JVM_END
2334 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxExceptionTableLength(JNIEnv *env, jclass cls, int method_index))
2335 JVMWrapper("JVM_GetMethodIxExceptionTableLength");
2336 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2337 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2338 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2339 return method->exception_table_length();
2340 JVM_END
2343 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxModifiers(JNIEnv *env, jclass cls, int method_index))
2344 JVMWrapper("JVM_GetMethodIxModifiers");
2345 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2346 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2347 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2348 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2349 JVM_END
2352 JVM_QUICK_ENTRY(jint, JVM_GetFieldIxModifiers(JNIEnv *env, jclass cls, int field_index))
2353 JVMWrapper("JVM_GetFieldIxModifiers");
2354 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2355 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2356 return InstanceKlass::cast(k)->field_access_flags(field_index) & JVM_RECOGNIZED_FIELD_MODIFIERS;
2357 JVM_END
2360 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxLocalsCount(JNIEnv *env, jclass cls, int method_index))
2361 JVMWrapper("JVM_GetMethodIxLocalsCount");
2362 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2363 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2364 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2365 return method->max_locals();
2366 JVM_END
2369 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxArgsSize(JNIEnv *env, jclass cls, int method_index))
2370 JVMWrapper("JVM_GetMethodIxArgsSize");
2371 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2372 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2373 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2374 return method->size_of_parameters();
2375 JVM_END
2378 JVM_QUICK_ENTRY(jint, JVM_GetMethodIxMaxStack(JNIEnv *env, jclass cls, int method_index))
2379 JVMWrapper("JVM_GetMethodIxMaxStack");
2380 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2381 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2382 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2383 return method->verifier_max_stack();
2384 JVM_END
2387 JVM_QUICK_ENTRY(jboolean, JVM_IsConstructorIx(JNIEnv *env, jclass cls, int method_index))
2388 JVMWrapper("JVM_IsConstructorIx");
2389 ResourceMark rm(THREAD);
2390 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2391 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2392 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2393 return method->name() == vmSymbols::object_initializer_name();
2394 JVM_END
2397 JVM_QUICK_ENTRY(jboolean, JVM_IsVMGeneratedMethodIx(JNIEnv *env, jclass cls, int method_index))
2398 JVMWrapper("JVM_IsVMGeneratedMethodIx");
2399 ResourceMark rm(THREAD);
2400 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2401 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2402 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2403 return method->is_overpass();
2404 JVM_END
2406 JVM_ENTRY(const char*, JVM_GetMethodIxNameUTF(JNIEnv *env, jclass cls, jint method_index))
2407 JVMWrapper("JVM_GetMethodIxIxUTF");
2408 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2409 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2410 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2411 return method->name()->as_utf8();
2412 JVM_END
2415 JVM_ENTRY(const char*, JVM_GetMethodIxSignatureUTF(JNIEnv *env, jclass cls, jint method_index))
2416 JVMWrapper("JVM_GetMethodIxSignatureUTF");
2417 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2418 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2419 Method* method = InstanceKlass::cast(k)->methods()->at(method_index);
2420 return method->signature()->as_utf8();
2421 JVM_END
2423 /**
2424 * All of these JVM_GetCP-xxx methods are used by the old verifier to
2425 * read entries in the constant pool. Since the old verifier always
2426 * works on a copy of the code, it will not see any rewriting that
2427 * may possibly occur in the middle of verification. So it is important
2428 * that nothing it calls tries to use the cpCache instead of the raw
2429 * constant pool, so we must use cp->uncached_x methods when appropriate.
2430 */
2431 JVM_ENTRY(const char*, JVM_GetCPFieldNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2432 JVMWrapper("JVM_GetCPFieldNameUTF");
2433 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2434 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2435 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2436 switch (cp->tag_at(cp_index).value()) {
2437 case JVM_CONSTANT_Fieldref:
2438 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2439 default:
2440 fatal("JVM_GetCPFieldNameUTF: illegal constant");
2441 }
2442 ShouldNotReachHere();
2443 return NULL;
2444 JVM_END
2447 JVM_ENTRY(const char*, JVM_GetCPMethodNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2448 JVMWrapper("JVM_GetCPMethodNameUTF");
2449 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2450 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2451 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2452 switch (cp->tag_at(cp_index).value()) {
2453 case JVM_CONSTANT_InterfaceMethodref:
2454 case JVM_CONSTANT_Methodref:
2455 case JVM_CONSTANT_NameAndType: // for invokedynamic
2456 return cp->uncached_name_ref_at(cp_index)->as_utf8();
2457 default:
2458 fatal("JVM_GetCPMethodNameUTF: illegal constant");
2459 }
2460 ShouldNotReachHere();
2461 return NULL;
2462 JVM_END
2465 JVM_ENTRY(const char*, JVM_GetCPMethodSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2466 JVMWrapper("JVM_GetCPMethodSignatureUTF");
2467 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2468 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2469 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2470 switch (cp->tag_at(cp_index).value()) {
2471 case JVM_CONSTANT_InterfaceMethodref:
2472 case JVM_CONSTANT_Methodref:
2473 case JVM_CONSTANT_NameAndType: // for invokedynamic
2474 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2475 default:
2476 fatal("JVM_GetCPMethodSignatureUTF: illegal constant");
2477 }
2478 ShouldNotReachHere();
2479 return NULL;
2480 JVM_END
2483 JVM_ENTRY(const char*, JVM_GetCPFieldSignatureUTF(JNIEnv *env, jclass cls, jint cp_index))
2484 JVMWrapper("JVM_GetCPFieldSignatureUTF");
2485 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2486 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2487 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2488 switch (cp->tag_at(cp_index).value()) {
2489 case JVM_CONSTANT_Fieldref:
2490 return cp->uncached_signature_ref_at(cp_index)->as_utf8();
2491 default:
2492 fatal("JVM_GetCPFieldSignatureUTF: illegal constant");
2493 }
2494 ShouldNotReachHere();
2495 return NULL;
2496 JVM_END
2499 JVM_ENTRY(const char*, JVM_GetCPClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2500 JVMWrapper("JVM_GetCPClassNameUTF");
2501 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2502 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2503 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2504 Symbol* classname = cp->klass_name_at(cp_index);
2505 return classname->as_utf8();
2506 JVM_END
2509 JVM_ENTRY(const char*, JVM_GetCPFieldClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2510 JVMWrapper("JVM_GetCPFieldClassNameUTF");
2511 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2512 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2513 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2514 switch (cp->tag_at(cp_index).value()) {
2515 case JVM_CONSTANT_Fieldref: {
2516 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2517 Symbol* classname = cp->klass_name_at(class_index);
2518 return classname->as_utf8();
2519 }
2520 default:
2521 fatal("JVM_GetCPFieldClassNameUTF: illegal constant");
2522 }
2523 ShouldNotReachHere();
2524 return NULL;
2525 JVM_END
2528 JVM_ENTRY(const char*, JVM_GetCPMethodClassNameUTF(JNIEnv *env, jclass cls, jint cp_index))
2529 JVMWrapper("JVM_GetCPMethodClassNameUTF");
2530 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2531 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2532 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2533 switch (cp->tag_at(cp_index).value()) {
2534 case JVM_CONSTANT_Methodref:
2535 case JVM_CONSTANT_InterfaceMethodref: {
2536 int class_index = cp->uncached_klass_ref_index_at(cp_index);
2537 Symbol* classname = cp->klass_name_at(class_index);
2538 return classname->as_utf8();
2539 }
2540 default:
2541 fatal("JVM_GetCPMethodClassNameUTF: illegal constant");
2542 }
2543 ShouldNotReachHere();
2544 return NULL;
2545 JVM_END
2548 JVM_ENTRY(jint, JVM_GetCPFieldModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2549 JVMWrapper("JVM_GetCPFieldModifiers");
2550 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2551 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2552 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2553 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2554 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2555 ConstantPool* cp_called = InstanceKlass::cast(k_called)->constants();
2556 switch (cp->tag_at(cp_index).value()) {
2557 case JVM_CONSTANT_Fieldref: {
2558 Symbol* name = cp->uncached_name_ref_at(cp_index);
2559 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2560 for (JavaFieldStream fs(k_called); !fs.done(); fs.next()) {
2561 if (fs.name() == name && fs.signature() == signature) {
2562 return fs.access_flags().as_short() & JVM_RECOGNIZED_FIELD_MODIFIERS;
2563 }
2564 }
2565 return -1;
2566 }
2567 default:
2568 fatal("JVM_GetCPFieldModifiers: illegal constant");
2569 }
2570 ShouldNotReachHere();
2571 return 0;
2572 JVM_END
2575 JVM_QUICK_ENTRY(jint, JVM_GetCPMethodModifiers(JNIEnv *env, jclass cls, int cp_index, jclass called_cls))
2576 JVMWrapper("JVM_GetCPMethodModifiers");
2577 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls));
2578 Klass* k_called = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(called_cls));
2579 k = JvmtiThreadState::class_to_verify_considering_redefinition(k, thread);
2580 k_called = JvmtiThreadState::class_to_verify_considering_redefinition(k_called, thread);
2581 ConstantPool* cp = InstanceKlass::cast(k)->constants();
2582 switch (cp->tag_at(cp_index).value()) {
2583 case JVM_CONSTANT_Methodref:
2584 case JVM_CONSTANT_InterfaceMethodref: {
2585 Symbol* name = cp->uncached_name_ref_at(cp_index);
2586 Symbol* signature = cp->uncached_signature_ref_at(cp_index);
2587 Array<Method*>* methods = InstanceKlass::cast(k_called)->methods();
2588 int methods_count = methods->length();
2589 for (int i = 0; i < methods_count; i++) {
2590 Method* method = methods->at(i);
2591 if (method->name() == name && method->signature() == signature) {
2592 return method->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2593 }
2594 }
2595 return -1;
2596 }
2597 default:
2598 fatal("JVM_GetCPMethodModifiers: illegal constant");
2599 }
2600 ShouldNotReachHere();
2601 return 0;
2602 JVM_END
2605 // Misc //////////////////////////////////////////////////////////////////////////////////////////////
2607 JVM_LEAF(void, JVM_ReleaseUTF(const char *utf))
2608 // So long as UTF8::convert_to_utf8 returns resource strings, we don't have to do anything
2609 JVM_END
2612 JVM_ENTRY(jboolean, JVM_IsSameClassPackage(JNIEnv *env, jclass class1, jclass class2))
2613 JVMWrapper("JVM_IsSameClassPackage");
2614 oop class1_mirror = JNIHandles::resolve_non_null(class1);
2615 oop class2_mirror = JNIHandles::resolve_non_null(class2);
2616 Klass* klass1 = java_lang_Class::as_Klass(class1_mirror);
2617 Klass* klass2 = java_lang_Class::as_Klass(class2_mirror);
2618 return (jboolean) Reflection::is_same_class_package(klass1, klass2);
2619 JVM_END
2622 // IO functions ////////////////////////////////////////////////////////////////////////////////////////
2624 JVM_LEAF(jint, JVM_Open(const char *fname, jint flags, jint mode))
2625 JVMWrapper2("JVM_Open (%s)", fname);
2627 //%note jvm_r6
2628 int result = os::open(fname, flags, mode);
2629 if (result >= 0) {
2630 return result;
2631 } else {
2632 switch(errno) {
2633 case EEXIST:
2634 return JVM_EEXIST;
2635 default:
2636 return -1;
2637 }
2638 }
2639 JVM_END
2642 JVM_LEAF(jint, JVM_Close(jint fd))
2643 JVMWrapper2("JVM_Close (0x%x)", fd);
2644 //%note jvm_r6
2645 return os::close(fd);
2646 JVM_END
2649 JVM_LEAF(jint, JVM_Read(jint fd, char *buf, jint nbytes))
2650 JVMWrapper2("JVM_Read (0x%x)", fd);
2652 //%note jvm_r6
2653 return (jint)os::restartable_read(fd, buf, nbytes);
2654 JVM_END
2657 JVM_LEAF(jint, JVM_Write(jint fd, char *buf, jint nbytes))
2658 JVMWrapper2("JVM_Write (0x%x)", fd);
2660 //%note jvm_r6
2661 return (jint)os::write(fd, buf, nbytes);
2662 JVM_END
2665 JVM_LEAF(jint, JVM_Available(jint fd, jlong *pbytes))
2666 JVMWrapper2("JVM_Available (0x%x)", fd);
2667 //%note jvm_r6
2668 return os::available(fd, pbytes);
2669 JVM_END
2672 JVM_LEAF(jlong, JVM_Lseek(jint fd, jlong offset, jint whence))
2673 JVMWrapper4("JVM_Lseek (0x%x, %Ld, %d)", fd, offset, whence);
2674 //%note jvm_r6
2675 return os::lseek(fd, offset, whence);
2676 JVM_END
2679 JVM_LEAF(jint, JVM_SetLength(jint fd, jlong length))
2680 JVMWrapper3("JVM_SetLength (0x%x, %Ld)", fd, length);
2681 return os::ftruncate(fd, length);
2682 JVM_END
2685 JVM_LEAF(jint, JVM_Sync(jint fd))
2686 JVMWrapper2("JVM_Sync (0x%x)", fd);
2687 //%note jvm_r6
2688 return os::fsync(fd);
2689 JVM_END
2692 // Printing support //////////////////////////////////////////////////
2693 extern "C" {
2695 int jio_vsnprintf(char *str, size_t count, const char *fmt, va_list args) {
2696 // see bug 4399518, 4417214
2697 if ((intptr_t)count <= 0) return -1;
2698 return vsnprintf(str, count, fmt, args);
2699 }
2702 int jio_snprintf(char *str, size_t count, const char *fmt, ...) {
2703 va_list args;
2704 int len;
2705 va_start(args, fmt);
2706 len = jio_vsnprintf(str, count, fmt, args);
2707 va_end(args);
2708 return len;
2709 }
2712 int jio_fprintf(FILE* f, const char *fmt, ...) {
2713 int len;
2714 va_list args;
2715 va_start(args, fmt);
2716 len = jio_vfprintf(f, fmt, args);
2717 va_end(args);
2718 return len;
2719 }
2722 int jio_vfprintf(FILE* f, const char *fmt, va_list args) {
2723 if (Arguments::vfprintf_hook() != NULL) {
2724 return Arguments::vfprintf_hook()(f, fmt, args);
2725 } else {
2726 return vfprintf(f, fmt, args);
2727 }
2728 }
2731 JNIEXPORT int jio_printf(const char *fmt, ...) {
2732 int len;
2733 va_list args;
2734 va_start(args, fmt);
2735 len = jio_vfprintf(defaultStream::output_stream(), fmt, args);
2736 va_end(args);
2737 return len;
2738 }
2741 // HotSpot specific jio method
2742 void jio_print(const char* s) {
2743 // Try to make this function as atomic as possible.
2744 if (Arguments::vfprintf_hook() != NULL) {
2745 jio_fprintf(defaultStream::output_stream(), "%s", s);
2746 } else {
2747 // Make an unused local variable to avoid warning from gcc 4.x compiler.
2748 size_t count = ::write(defaultStream::output_fd(), s, (int)strlen(s));
2749 }
2750 }
2752 } // Extern C
2754 // java.lang.Thread //////////////////////////////////////////////////////////////////////////////
2756 // In most of the JVM Thread support functions we need to be sure to lock the Threads_lock
2757 // to prevent the target thread from exiting after we have a pointer to the C++ Thread or
2758 // OSThread objects. The exception to this rule is when the target object is the thread
2759 // doing the operation, in which case we know that the thread won't exit until the
2760 // operation is done (all exits being voluntary). There are a few cases where it is
2761 // rather silly to do operations on yourself, like resuming yourself or asking whether
2762 // you are alive. While these can still happen, they are not subject to deadlocks if
2763 // the lock is held while the operation occurs (this is not the case for suspend, for
2764 // instance), and are very unlikely. Because IsAlive needs to be fast and its
2765 // implementation is local to this file, we always lock Threads_lock for that one.
2767 static void thread_entry(JavaThread* thread, TRAPS) {
2768 HandleMark hm(THREAD);
2769 Handle obj(THREAD, thread->threadObj());
2770 JavaValue result(T_VOID);
2771 JavaCalls::call_virtual(&result,
2772 obj,
2773 KlassHandle(THREAD, SystemDictionary::Thread_klass()),
2774 vmSymbols::run_method_name(),
2775 vmSymbols::void_method_signature(),
2776 THREAD);
2777 }
2780 JVM_ENTRY(void, JVM_StartThread(JNIEnv* env, jobject jthread))
2781 JVMWrapper("JVM_StartThread");
2782 JavaThread *native_thread = NULL;
2784 // We cannot hold the Threads_lock when we throw an exception,
2785 // due to rank ordering issues. Example: we might need to grab the
2786 // Heap_lock while we construct the exception.
2787 bool throw_illegal_thread_state = false;
2789 // We must release the Threads_lock before we can post a jvmti event
2790 // in Thread::start.
2791 {
2792 // Ensure that the C++ Thread and OSThread structures aren't freed before
2793 // we operate.
2794 MutexLocker mu(Threads_lock);
2796 // Since JDK 5 the java.lang.Thread threadStatus is used to prevent
2797 // re-starting an already started thread, so we should usually find
2798 // that the JavaThread is null. However for a JNI attached thread
2799 // there is a small window between the Thread object being created
2800 // (with its JavaThread set) and the update to its threadStatus, so we
2801 // have to check for this
2802 if (java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread)) != NULL) {
2803 throw_illegal_thread_state = true;
2804 } else {
2805 // We could also check the stillborn flag to see if this thread was already stopped, but
2806 // for historical reasons we let the thread detect that itself when it starts running
2808 jlong size =
2809 java_lang_Thread::stackSize(JNIHandles::resolve_non_null(jthread));
2810 // Allocate the C++ Thread structure and create the native thread. The
2811 // stack size retrieved from java is signed, but the constructor takes
2812 // size_t (an unsigned type), so avoid passing negative values which would
2813 // result in really large stacks.
2814 size_t sz = size > 0 ? (size_t) size : 0;
2815 native_thread = new JavaThread(&thread_entry, sz);
2817 // At this point it may be possible that no osthread was created for the
2818 // JavaThread due to lack of memory. Check for this situation and throw
2819 // an exception if necessary. Eventually we may want to change this so
2820 // that we only grab the lock if the thread was created successfully -
2821 // then we can also do this check and throw the exception in the
2822 // JavaThread constructor.
2823 if (native_thread->osthread() != NULL) {
2824 // Note: the current thread is not being used within "prepare".
2825 native_thread->prepare(jthread);
2826 }
2827 }
2828 }
2830 if (throw_illegal_thread_state) {
2831 THROW(vmSymbols::java_lang_IllegalThreadStateException());
2832 }
2834 assert(native_thread != NULL, "Starting null thread?");
2836 if (native_thread->osthread() == NULL) {
2837 // No one should hold a reference to the 'native_thread'.
2838 delete native_thread;
2839 if (JvmtiExport::should_post_resource_exhausted()) {
2840 JvmtiExport::post_resource_exhausted(
2841 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_THREADS,
2842 "unable to create new native thread");
2843 }
2844 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
2845 "unable to create new native thread");
2846 }
2848 Thread::start(native_thread);
2850 JVM_END
2852 // JVM_Stop is implemented using a VM_Operation, so threads are forced to safepoints
2853 // before the quasi-asynchronous exception is delivered. This is a little obtrusive,
2854 // but is thought to be reliable and simple. In the case, where the receiver is the
2855 // same thread as the sender, no safepoint is needed.
2856 JVM_ENTRY(void, JVM_StopThread(JNIEnv* env, jobject jthread, jobject throwable))
2857 JVMWrapper("JVM_StopThread");
2859 oop java_throwable = JNIHandles::resolve(throwable);
2860 if (java_throwable == NULL) {
2861 THROW(vmSymbols::java_lang_NullPointerException());
2862 }
2863 oop java_thread = JNIHandles::resolve_non_null(jthread);
2864 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2865 Events::log_exception(JavaThread::current(),
2866 "JVM_StopThread thread JavaThread " INTPTR_FORMAT " as oop " INTPTR_FORMAT " [exception " INTPTR_FORMAT "]",
2867 receiver, (address)java_thread, throwable);
2868 // First check if thread is alive
2869 if (receiver != NULL) {
2870 // Check if exception is getting thrown at self (use oop equality, since the
2871 // target object might exit)
2872 if (java_thread == thread->threadObj()) {
2873 THROW_OOP(java_throwable);
2874 } else {
2875 // Enques a VM_Operation to stop all threads and then deliver the exception...
2876 Thread::send_async_exception(java_thread, JNIHandles::resolve(throwable));
2877 }
2878 }
2879 else {
2880 // Either:
2881 // - target thread has not been started before being stopped, or
2882 // - target thread already terminated
2883 // We could read the threadStatus to determine which case it is
2884 // but that is overkill as it doesn't matter. We must set the
2885 // stillborn flag for the first case, and if the thread has already
2886 // exited setting this flag has no affect
2887 java_lang_Thread::set_stillborn(java_thread);
2888 }
2889 JVM_END
2892 JVM_ENTRY(jboolean, JVM_IsThreadAlive(JNIEnv* env, jobject jthread))
2893 JVMWrapper("JVM_IsThreadAlive");
2895 oop thread_oop = JNIHandles::resolve_non_null(jthread);
2896 return java_lang_Thread::is_alive(thread_oop);
2897 JVM_END
2900 JVM_ENTRY(void, JVM_SuspendThread(JNIEnv* env, jobject jthread))
2901 JVMWrapper("JVM_SuspendThread");
2902 oop java_thread = JNIHandles::resolve_non_null(jthread);
2903 JavaThread* receiver = java_lang_Thread::thread(java_thread);
2905 if (receiver != NULL) {
2906 // thread has run and has not exited (still on threads list)
2908 {
2909 MutexLockerEx ml(receiver->SR_lock(), Mutex::_no_safepoint_check_flag);
2910 if (receiver->is_external_suspend()) {
2911 // Don't allow nested external suspend requests. We can't return
2912 // an error from this interface so just ignore the problem.
2913 return;
2914 }
2915 if (receiver->is_exiting()) { // thread is in the process of exiting
2916 return;
2917 }
2918 receiver->set_external_suspend();
2919 }
2921 // java_suspend() will catch threads in the process of exiting
2922 // and will ignore them.
2923 receiver->java_suspend();
2925 // It would be nice to have the following assertion in all the
2926 // time, but it is possible for a racing resume request to have
2927 // resumed this thread right after we suspended it. Temporarily
2928 // enable this assertion if you are chasing a different kind of
2929 // bug.
2930 //
2931 // assert(java_lang_Thread::thread(receiver->threadObj()) == NULL ||
2932 // receiver->is_being_ext_suspended(), "thread is not suspended");
2933 }
2934 JVM_END
2937 JVM_ENTRY(void, JVM_ResumeThread(JNIEnv* env, jobject jthread))
2938 JVMWrapper("JVM_ResumeThread");
2939 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
2940 // We need to *always* get the threads lock here, since this operation cannot be allowed during
2941 // a safepoint. The safepoint code relies on suspending a thread to examine its state. If other
2942 // threads randomly resumes threads, then a thread might not be suspended when the safepoint code
2943 // looks at it.
2944 MutexLocker ml(Threads_lock);
2945 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
2946 if (thr != NULL) {
2947 // the thread has run and is not in the process of exiting
2948 thr->java_resume();
2949 }
2950 JVM_END
2953 JVM_ENTRY(void, JVM_SetThreadPriority(JNIEnv* env, jobject jthread, jint prio))
2954 JVMWrapper("JVM_SetThreadPriority");
2955 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
2956 MutexLocker ml(Threads_lock);
2957 oop java_thread = JNIHandles::resolve_non_null(jthread);
2958 java_lang_Thread::set_priority(java_thread, (ThreadPriority)prio);
2959 JavaThread* thr = java_lang_Thread::thread(java_thread);
2960 if (thr != NULL) { // Thread not yet started; priority pushed down when it is
2961 Thread::set_priority(thr, (ThreadPriority)prio);
2962 }
2963 JVM_END
2966 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
2967 JVMWrapper("JVM_Yield");
2968 if (os::dont_yield()) return;
2969 #ifndef USDT2
2970 HS_DTRACE_PROBE0(hotspot, thread__yield);
2971 #else /* USDT2 */
2972 HOTSPOT_THREAD_YIELD();
2973 #endif /* USDT2 */
2974 // When ConvertYieldToSleep is off (default), this matches the classic VM use of yield.
2975 // Critical for similar threading behaviour
2976 if (ConvertYieldToSleep) {
2977 os::sleep(thread, MinSleepInterval, false);
2978 } else {
2979 os::yield();
2980 }
2981 JVM_END
2984 JVM_ENTRY(void, JVM_Sleep(JNIEnv* env, jclass threadClass, jlong millis))
2985 JVMWrapper("JVM_Sleep");
2987 if (millis < 0) {
2988 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "timeout value is negative");
2989 }
2991 if (Thread::is_interrupted (THREAD, true) && !HAS_PENDING_EXCEPTION) {
2992 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
2993 }
2995 // Save current thread state and restore it at the end of this block.
2996 // And set new thread state to SLEEPING.
2997 JavaThreadSleepState jtss(thread);
2999 #ifndef USDT2
3000 HS_DTRACE_PROBE1(hotspot, thread__sleep__begin, millis);
3001 #else /* USDT2 */
3002 HOTSPOT_THREAD_SLEEP_BEGIN(
3003 millis);
3004 #endif /* USDT2 */
3006 if (millis == 0) {
3007 // When ConvertSleepToYield is on, this matches the classic VM implementation of
3008 // JVM_Sleep. Critical for similar threading behaviour (Win32)
3009 // It appears that in certain GUI contexts, it may be beneficial to do a short sleep
3010 // for SOLARIS
3011 if (ConvertSleepToYield) {
3012 os::yield();
3013 } else {
3014 ThreadState old_state = thread->osthread()->get_state();
3015 thread->osthread()->set_state(SLEEPING);
3016 os::sleep(thread, MinSleepInterval, false);
3017 thread->osthread()->set_state(old_state);
3018 }
3019 } else {
3020 ThreadState old_state = thread->osthread()->get_state();
3021 thread->osthread()->set_state(SLEEPING);
3022 if (os::sleep(thread, millis, true) == OS_INTRPT) {
3023 // An asynchronous exception (e.g., ThreadDeathException) could have been thrown on
3024 // us while we were sleeping. We do not overwrite those.
3025 if (!HAS_PENDING_EXCEPTION) {
3026 #ifndef USDT2
3027 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,1);
3028 #else /* USDT2 */
3029 HOTSPOT_THREAD_SLEEP_END(
3030 1);
3031 #endif /* USDT2 */
3032 // TODO-FIXME: THROW_MSG returns which means we will not call set_state()
3033 // to properly restore the thread state. That's likely wrong.
3034 THROW_MSG(vmSymbols::java_lang_InterruptedException(), "sleep interrupted");
3035 }
3036 }
3037 thread->osthread()->set_state(old_state);
3038 }
3039 #ifndef USDT2
3040 HS_DTRACE_PROBE1(hotspot, thread__sleep__end,0);
3041 #else /* USDT2 */
3042 HOTSPOT_THREAD_SLEEP_END(
3043 0);
3044 #endif /* USDT2 */
3045 JVM_END
3047 JVM_ENTRY(jobject, JVM_CurrentThread(JNIEnv* env, jclass threadClass))
3048 JVMWrapper("JVM_CurrentThread");
3049 oop jthread = thread->threadObj();
3050 assert (thread != NULL, "no current thread!");
3051 return JNIHandles::make_local(env, jthread);
3052 JVM_END
3055 JVM_ENTRY(jint, JVM_CountStackFrames(JNIEnv* env, jobject jthread))
3056 JVMWrapper("JVM_CountStackFrames");
3058 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3059 oop java_thread = JNIHandles::resolve_non_null(jthread);
3060 bool throw_illegal_thread_state = false;
3061 int count = 0;
3063 {
3064 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3065 // We need to re-resolve the java_thread, since a GC might have happened during the
3066 // acquire of the lock
3067 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3069 if (thr == NULL) {
3070 // do nothing
3071 } else if(! thr->is_external_suspend() || ! thr->frame_anchor()->walkable()) {
3072 // Check whether this java thread has been suspended already. If not, throws
3073 // IllegalThreadStateException. We defer to throw that exception until
3074 // Threads_lock is released since loading exception class has to leave VM.
3075 // The correct way to test a thread is actually suspended is
3076 // wait_for_ext_suspend_completion(), but we can't call that while holding
3077 // the Threads_lock. The above tests are sufficient for our purposes
3078 // provided the walkability of the stack is stable - which it isn't
3079 // 100% but close enough for most practical purposes.
3080 throw_illegal_thread_state = true;
3081 } else {
3082 // Count all java activation, i.e., number of vframes
3083 for(vframeStream vfst(thr); !vfst.at_end(); vfst.next()) {
3084 // Native frames are not counted
3085 if (!vfst.method()->is_native()) count++;
3086 }
3087 }
3088 }
3090 if (throw_illegal_thread_state) {
3091 THROW_MSG_0(vmSymbols::java_lang_IllegalThreadStateException(),
3092 "this thread is not suspended");
3093 }
3094 return count;
3095 JVM_END
3097 // Consider: A better way to implement JVM_Interrupt() is to acquire
3098 // Threads_lock to resolve the jthread into a Thread pointer, fetch
3099 // Thread->platformevent, Thread->native_thr, Thread->parker, etc.,
3100 // drop Threads_lock, and the perform the unpark() and thr_kill() operations
3101 // outside the critical section. Threads_lock is hot so we want to minimize
3102 // the hold-time. A cleaner interface would be to decompose interrupt into
3103 // two steps. The 1st phase, performed under Threads_lock, would return
3104 // a closure that'd be invoked after Threads_lock was dropped.
3105 // This tactic is safe as PlatformEvent and Parkers are type-stable (TSM) and
3106 // admit spurious wakeups.
3108 JVM_ENTRY(void, JVM_Interrupt(JNIEnv* env, jobject jthread))
3109 JVMWrapper("JVM_Interrupt");
3111 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3112 oop java_thread = JNIHandles::resolve_non_null(jthread);
3113 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3114 // We need to re-resolve the java_thread, since a GC might have happened during the
3115 // acquire of the lock
3116 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3117 if (thr != NULL) {
3118 Thread::interrupt(thr);
3119 }
3120 JVM_END
3123 JVM_QUICK_ENTRY(jboolean, JVM_IsInterrupted(JNIEnv* env, jobject jthread, jboolean clear_interrupted))
3124 JVMWrapper("JVM_IsInterrupted");
3126 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate
3127 oop java_thread = JNIHandles::resolve_non_null(jthread);
3128 MutexLockerEx ml(thread->threadObj() == java_thread ? NULL : Threads_lock);
3129 // We need to re-resolve the java_thread, since a GC might have happened during the
3130 // acquire of the lock
3131 JavaThread* thr = java_lang_Thread::thread(JNIHandles::resolve_non_null(jthread));
3132 if (thr == NULL) {
3133 return JNI_FALSE;
3134 } else {
3135 return (jboolean) Thread::is_interrupted(thr, clear_interrupted != 0);
3136 }
3137 JVM_END
3140 // Return true iff the current thread has locked the object passed in
3142 JVM_ENTRY(jboolean, JVM_HoldsLock(JNIEnv* env, jclass threadClass, jobject obj))
3143 JVMWrapper("JVM_HoldsLock");
3144 assert(THREAD->is_Java_thread(), "sanity check");
3145 if (obj == NULL) {
3146 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
3147 }
3148 Handle h_obj(THREAD, JNIHandles::resolve(obj));
3149 return ObjectSynchronizer::current_thread_holds_lock((JavaThread*)THREAD, h_obj);
3150 JVM_END
3153 JVM_ENTRY(void, JVM_DumpAllStacks(JNIEnv* env, jclass))
3154 JVMWrapper("JVM_DumpAllStacks");
3155 VM_PrintThreads op;
3156 VMThread::execute(&op);
3157 if (JvmtiExport::should_post_data_dump()) {
3158 JvmtiExport::post_data_dump();
3159 }
3160 JVM_END
3162 JVM_ENTRY(void, JVM_SetNativeThreadName(JNIEnv* env, jobject jthread, jstring name))
3163 JVMWrapper("JVM_SetNativeThreadName");
3164 ResourceMark rm(THREAD);
3165 oop java_thread = JNIHandles::resolve_non_null(jthread);
3166 JavaThread* thr = java_lang_Thread::thread(java_thread);
3167 // Thread naming only supported for the current thread, doesn't work for
3168 // target threads.
3169 if (Thread::current() == thr && !thr->has_attached_via_jni()) {
3170 // we don't set the name of an attached thread to avoid stepping
3171 // on other programs
3172 const char *thread_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3173 os::set_native_thread_name(thread_name);
3174 }
3175 JVM_END
3177 // java.lang.SecurityManager ///////////////////////////////////////////////////////////////////////
3179 static bool is_trusted_frame(JavaThread* jthread, vframeStream* vfst) {
3180 assert(jthread->is_Java_thread(), "must be a Java thread");
3181 if (jthread->privileged_stack_top() == NULL) return false;
3182 if (jthread->privileged_stack_top()->frame_id() == vfst->frame_id()) {
3183 oop loader = jthread->privileged_stack_top()->class_loader();
3184 if (loader == NULL) return true;
3185 bool trusted = java_lang_ClassLoader::is_trusted_loader(loader);
3186 if (trusted) return true;
3187 }
3188 return false;
3189 }
3191 JVM_ENTRY(jclass, JVM_CurrentLoadedClass(JNIEnv *env))
3192 JVMWrapper("JVM_CurrentLoadedClass");
3193 ResourceMark rm(THREAD);
3195 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3196 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3197 bool trusted = is_trusted_frame(thread, &vfst);
3198 if (trusted) return NULL;
3200 Method* m = vfst.method();
3201 if (!m->is_native()) {
3202 InstanceKlass* holder = m->method_holder();
3203 oop loader = holder->class_loader();
3204 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3205 return (jclass) JNIHandles::make_local(env, holder->java_mirror());
3206 }
3207 }
3208 }
3209 return NULL;
3210 JVM_END
3213 JVM_ENTRY(jobject, JVM_CurrentClassLoader(JNIEnv *env))
3214 JVMWrapper("JVM_CurrentClassLoader");
3215 ResourceMark rm(THREAD);
3217 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3219 // if a method in a class in a trusted loader is in a doPrivileged, return NULL
3220 bool trusted = is_trusted_frame(thread, &vfst);
3221 if (trusted) return NULL;
3223 Method* m = vfst.method();
3224 if (!m->is_native()) {
3225 InstanceKlass* holder = m->method_holder();
3226 assert(holder->is_klass(), "just checking");
3227 oop loader = holder->class_loader();
3228 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3229 return JNIHandles::make_local(env, loader);
3230 }
3231 }
3232 }
3233 return NULL;
3234 JVM_END
3237 // Utility object for collecting method holders walking down the stack
3238 class KlassLink: public ResourceObj {
3239 public:
3240 KlassHandle klass;
3241 KlassLink* next;
3243 KlassLink(KlassHandle k) { klass = k; next = NULL; }
3244 };
3247 JVM_ENTRY(jobjectArray, JVM_GetClassContext(JNIEnv *env))
3248 JVMWrapper("JVM_GetClassContext");
3249 ResourceMark rm(THREAD);
3250 JvmtiVMObjectAllocEventCollector oam;
3251 // Collect linked list of (handles to) method holders
3252 KlassLink* first = NULL;
3253 KlassLink* last = NULL;
3254 int depth = 0;
3255 vframeStream vfst(thread);
3257 if (SystemDictionary::reflect_CallerSensitive_klass() != NULL) {
3258 // This must only be called from SecurityManager.getClassContext
3259 Method* m = vfst.method();
3260 if (!(m->method_holder() == SystemDictionary::SecurityManager_klass() &&
3261 m->name() == vmSymbols::getClassContext_name() &&
3262 m->signature() == vmSymbols::void_class_array_signature())) {
3263 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVM_GetClassContext must only be called from SecurityManager.getClassContext");
3264 }
3265 }
3267 // Collect method holders
3268 for (; !vfst.at_end(); vfst.security_next()) {
3269 Method* m = vfst.method();
3270 // Native frames are not returned
3271 if (!m->is_ignored_by_security_stack_walk() && !m->is_native()) {
3272 Klass* holder = m->method_holder();
3273 assert(holder->is_klass(), "just checking");
3274 depth++;
3275 KlassLink* l = new KlassLink(KlassHandle(thread, holder));
3276 if (first == NULL) {
3277 first = last = l;
3278 } else {
3279 last->next = l;
3280 last = l;
3281 }
3282 }
3283 }
3285 // Create result array of type [Ljava/lang/Class;
3286 objArrayOop result = oopFactory::new_objArray(SystemDictionary::Class_klass(), depth, CHECK_NULL);
3287 // Fill in mirrors corresponding to method holders
3288 int index = 0;
3289 while (first != NULL) {
3290 result->obj_at_put(index++, first->klass()->java_mirror());
3291 first = first->next;
3292 }
3293 assert(index == depth, "just checking");
3295 return (jobjectArray) JNIHandles::make_local(env, result);
3296 JVM_END
3299 JVM_ENTRY(jint, JVM_ClassDepth(JNIEnv *env, jstring name))
3300 JVMWrapper("JVM_ClassDepth");
3301 ResourceMark rm(THREAD);
3302 Handle h_name (THREAD, JNIHandles::resolve_non_null(name));
3303 Handle class_name_str = java_lang_String::internalize_classname(h_name, CHECK_0);
3305 const char* str = java_lang_String::as_utf8_string(class_name_str());
3306 TempNewSymbol class_name_sym = SymbolTable::probe(str, (int)strlen(str));
3307 if (class_name_sym == NULL) {
3308 return -1;
3309 }
3311 int depth = 0;
3313 for(vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3314 if (!vfst.method()->is_native()) {
3315 InstanceKlass* holder = vfst.method()->method_holder();
3316 assert(holder->is_klass(), "just checking");
3317 if (holder->name() == class_name_sym) {
3318 return depth;
3319 }
3320 depth++;
3321 }
3322 }
3323 return -1;
3324 JVM_END
3327 JVM_ENTRY(jint, JVM_ClassLoaderDepth(JNIEnv *env))
3328 JVMWrapper("JVM_ClassLoaderDepth");
3329 ResourceMark rm(THREAD);
3330 int depth = 0;
3331 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3332 // if a method in a class in a trusted loader is in a doPrivileged, return -1
3333 bool trusted = is_trusted_frame(thread, &vfst);
3334 if (trusted) return -1;
3336 Method* m = vfst.method();
3337 if (!m->is_native()) {
3338 InstanceKlass* holder = m->method_holder();
3339 assert(holder->is_klass(), "just checking");
3340 oop loader = holder->class_loader();
3341 if (loader != NULL && !java_lang_ClassLoader::is_trusted_loader(loader)) {
3342 return depth;
3343 }
3344 depth++;
3345 }
3346 }
3347 return -1;
3348 JVM_END
3351 // java.lang.Package ////////////////////////////////////////////////////////////////
3354 JVM_ENTRY(jstring, JVM_GetSystemPackage(JNIEnv *env, jstring name))
3355 JVMWrapper("JVM_GetSystemPackage");
3356 ResourceMark rm(THREAD);
3357 JvmtiVMObjectAllocEventCollector oam;
3358 char* str = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name));
3359 oop result = ClassLoader::get_system_package(str, CHECK_NULL);
3360 return (jstring) JNIHandles::make_local(result);
3361 JVM_END
3364 JVM_ENTRY(jobjectArray, JVM_GetSystemPackages(JNIEnv *env))
3365 JVMWrapper("JVM_GetSystemPackages");
3366 JvmtiVMObjectAllocEventCollector oam;
3367 objArrayOop result = ClassLoader::get_system_packages(CHECK_NULL);
3368 return (jobjectArray) JNIHandles::make_local(result);
3369 JVM_END
3372 // ObjectInputStream ///////////////////////////////////////////////////////////////
3374 bool force_verify_field_access(Klass* current_class, Klass* field_class, AccessFlags access, bool classloader_only) {
3375 if (current_class == NULL) {
3376 return true;
3377 }
3378 if ((current_class == field_class) || access.is_public()) {
3379 return true;
3380 }
3382 if (access.is_protected()) {
3383 // See if current_class is a subclass of field_class
3384 if (current_class->is_subclass_of(field_class)) {
3385 return true;
3386 }
3387 }
3389 return (!access.is_private() && InstanceKlass::cast(current_class)->is_same_class_package(field_class));
3390 }
3393 // JVM_AllocateNewObject and JVM_AllocateNewArray are unused as of 1.4
3394 JVM_ENTRY(jobject, JVM_AllocateNewObject(JNIEnv *env, jobject receiver, jclass currClass, jclass initClass))
3395 JVMWrapper("JVM_AllocateNewObject");
3396 JvmtiVMObjectAllocEventCollector oam;
3397 // Receiver is not used
3398 oop curr_mirror = JNIHandles::resolve_non_null(currClass);
3399 oop init_mirror = JNIHandles::resolve_non_null(initClass);
3401 // Cannot instantiate primitive types
3402 if (java_lang_Class::is_primitive(curr_mirror) || java_lang_Class::is_primitive(init_mirror)) {
3403 ResourceMark rm(THREAD);
3404 THROW_0(vmSymbols::java_lang_InvalidClassException());
3405 }
3407 // Arrays not allowed here, must use JVM_AllocateNewArray
3408 if (java_lang_Class::as_Klass(curr_mirror)->oop_is_array() ||
3409 java_lang_Class::as_Klass(init_mirror)->oop_is_array()) {
3410 ResourceMark rm(THREAD);
3411 THROW_0(vmSymbols::java_lang_InvalidClassException());
3412 }
3414 instanceKlassHandle curr_klass (THREAD, java_lang_Class::as_Klass(curr_mirror));
3415 instanceKlassHandle init_klass (THREAD, java_lang_Class::as_Klass(init_mirror));
3417 assert(curr_klass->is_subclass_of(init_klass()), "just checking");
3419 // Interfaces, abstract classes, and java.lang.Class classes cannot be instantiated directly.
3420 curr_klass->check_valid_for_instantiation(false, CHECK_NULL);
3422 // Make sure klass is initialized, since we are about to instantiate one of them.
3423 curr_klass->initialize(CHECK_NULL);
3425 methodHandle m (THREAD,
3426 init_klass->find_method(vmSymbols::object_initializer_name(),
3427 vmSymbols::void_method_signature()));
3428 if (m.is_null()) {
3429 ResourceMark rm(THREAD);
3430 THROW_MSG_0(vmSymbols::java_lang_NoSuchMethodError(),
3431 Method::name_and_sig_as_C_string(init_klass(),
3432 vmSymbols::object_initializer_name(),
3433 vmSymbols::void_method_signature()));
3434 }
3436 if (curr_klass == init_klass && !m->is_public()) {
3437 // Calling the constructor for class 'curr_klass'.
3438 // Only allow calls to a public no-arg constructor.
3439 // This path corresponds to creating an Externalizable object.
3440 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3441 }
3443 if (!force_verify_field_access(curr_klass(), init_klass(), m->access_flags(), false)) {
3444 // subclass 'curr_klass' does not have access to no-arg constructor of 'initcb'
3445 THROW_0(vmSymbols::java_lang_IllegalAccessException());
3446 }
3448 Handle obj = curr_klass->allocate_instance_handle(CHECK_NULL);
3449 // Call constructor m. This might call a constructor higher up in the hierachy
3450 JavaCalls::call_default_constructor(thread, m, obj, CHECK_NULL);
3452 return JNIHandles::make_local(obj());
3453 JVM_END
3456 JVM_ENTRY(jobject, JVM_AllocateNewArray(JNIEnv *env, jobject obj, jclass currClass, jint length))
3457 JVMWrapper("JVM_AllocateNewArray");
3458 JvmtiVMObjectAllocEventCollector oam;
3459 oop mirror = JNIHandles::resolve_non_null(currClass);
3461 if (java_lang_Class::is_primitive(mirror)) {
3462 THROW_0(vmSymbols::java_lang_InvalidClassException());
3463 }
3464 Klass* k = java_lang_Class::as_Klass(mirror);
3465 oop result;
3467 if (k->oop_is_typeArray()) {
3468 // typeArray
3469 result = TypeArrayKlass::cast(k)->allocate(length, CHECK_NULL);
3470 } else if (k->oop_is_objArray()) {
3471 // objArray
3472 ObjArrayKlass* oak = ObjArrayKlass::cast(k);
3473 oak->initialize(CHECK_NULL); // make sure class is initialized (matches Classic VM behavior)
3474 result = oak->allocate(length, CHECK_NULL);
3475 } else {
3476 THROW_0(vmSymbols::java_lang_InvalidClassException());
3477 }
3478 return JNIHandles::make_local(env, result);
3479 JVM_END
3482 // Return the first non-null class loader up the execution stack, or null
3483 // if only code from the null class loader is on the stack.
3485 JVM_ENTRY(jobject, JVM_LatestUserDefinedLoader(JNIEnv *env))
3486 for (vframeStream vfst(thread); !vfst.at_end(); vfst.next()) {
3487 // UseNewReflection
3488 vfst.skip_reflection_related_frames(); // Only needed for 1.4 reflection
3489 oop loader = vfst.method()->method_holder()->class_loader();
3490 if (loader != NULL) {
3491 return JNIHandles::make_local(env, loader);
3492 }
3493 }
3494 return NULL;
3495 JVM_END
3498 // Load a class relative to the most recent class on the stack with a non-null
3499 // classloader.
3500 // This function has been deprecated and should not be considered part of the
3501 // specified JVM interface.
3503 JVM_ENTRY(jclass, JVM_LoadClass0(JNIEnv *env, jobject receiver,
3504 jclass currClass, jstring currClassName))
3505 JVMWrapper("JVM_LoadClass0");
3506 // Receiver is not used
3507 ResourceMark rm(THREAD);
3509 // Class name argument is not guaranteed to be in internal format
3510 Handle classname (THREAD, JNIHandles::resolve_non_null(currClassName));
3511 Handle string = java_lang_String::internalize_classname(classname, CHECK_NULL);
3513 const char* str = java_lang_String::as_utf8_string(string());
3515 if (str == NULL || (int)strlen(str) > Symbol::max_length()) {
3516 // It's impossible to create this class; the name cannot fit
3517 // into the constant pool.
3518 THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), str);
3519 }
3521 TempNewSymbol name = SymbolTable::new_symbol(str, CHECK_NULL);
3522 Handle curr_klass (THREAD, JNIHandles::resolve(currClass));
3523 // Find the most recent class on the stack with a non-null classloader
3524 oop loader = NULL;
3525 oop protection_domain = NULL;
3526 if (curr_klass.is_null()) {
3527 for (vframeStream vfst(thread);
3528 !vfst.at_end() && loader == NULL;
3529 vfst.next()) {
3530 if (!vfst.method()->is_native()) {
3531 InstanceKlass* holder = vfst.method()->method_holder();
3532 loader = holder->class_loader();
3533 protection_domain = holder->protection_domain();
3534 }
3535 }
3536 } else {
3537 Klass* curr_klass_oop = java_lang_Class::as_Klass(curr_klass());
3538 loader = InstanceKlass::cast(curr_klass_oop)->class_loader();
3539 protection_domain = InstanceKlass::cast(curr_klass_oop)->protection_domain();
3540 }
3541 Handle h_loader(THREAD, loader);
3542 Handle h_prot (THREAD, protection_domain);
3543 jclass result = find_class_from_class_loader(env, name, true, h_loader, h_prot,
3544 false, thread);
3545 if (TraceClassResolution && result != NULL) {
3546 trace_class_resolution(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(result)));
3547 }
3548 return result;
3549 JVM_END
3552 // Array ///////////////////////////////////////////////////////////////////////////////////////////
3555 // resolve array handle and check arguments
3556 static inline arrayOop check_array(JNIEnv *env, jobject arr, bool type_array_only, TRAPS) {
3557 if (arr == NULL) {
3558 THROW_0(vmSymbols::java_lang_NullPointerException());
3559 }
3560 oop a = JNIHandles::resolve_non_null(arr);
3561 if (!a->is_array() || (type_array_only && !a->is_typeArray())) {
3562 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Argument is not an array");
3563 }
3564 return arrayOop(a);
3565 }
3568 JVM_ENTRY(jint, JVM_GetArrayLength(JNIEnv *env, jobject arr))
3569 JVMWrapper("JVM_GetArrayLength");
3570 arrayOop a = check_array(env, arr, false, CHECK_0);
3571 return a->length();
3572 JVM_END
3575 JVM_ENTRY(jobject, JVM_GetArrayElement(JNIEnv *env, jobject arr, jint index))
3576 JVMWrapper("JVM_Array_Get");
3577 JvmtiVMObjectAllocEventCollector oam;
3578 arrayOop a = check_array(env, arr, false, CHECK_NULL);
3579 jvalue value;
3580 BasicType type = Reflection::array_get(&value, a, index, CHECK_NULL);
3581 oop box = Reflection::box(&value, type, CHECK_NULL);
3582 return JNIHandles::make_local(env, box);
3583 JVM_END
3586 JVM_ENTRY(jvalue, JVM_GetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jint wCode))
3587 JVMWrapper("JVM_GetPrimitiveArrayElement");
3588 jvalue value;
3589 value.i = 0; // to initialize value before getting used in CHECK
3590 arrayOop a = check_array(env, arr, true, CHECK_(value));
3591 assert(a->is_typeArray(), "just checking");
3592 BasicType type = Reflection::array_get(&value, a, index, CHECK_(value));
3593 BasicType wide_type = (BasicType) wCode;
3594 if (type != wide_type) {
3595 Reflection::widen(&value, type, wide_type, CHECK_(value));
3596 }
3597 return value;
3598 JVM_END
3601 JVM_ENTRY(void, JVM_SetArrayElement(JNIEnv *env, jobject arr, jint index, jobject val))
3602 JVMWrapper("JVM_SetArrayElement");
3603 arrayOop a = check_array(env, arr, false, CHECK);
3604 oop box = JNIHandles::resolve(val);
3605 jvalue value;
3606 value.i = 0; // to initialize value before getting used in CHECK
3607 BasicType value_type;
3608 if (a->is_objArray()) {
3609 // Make sure we do no unbox e.g. java/lang/Integer instances when storing into an object array
3610 value_type = Reflection::unbox_for_regular_object(box, &value);
3611 } else {
3612 value_type = Reflection::unbox_for_primitive(box, &value, CHECK);
3613 }
3614 Reflection::array_set(&value, a, index, value_type, CHECK);
3615 JVM_END
3618 JVM_ENTRY(void, JVM_SetPrimitiveArrayElement(JNIEnv *env, jobject arr, jint index, jvalue v, unsigned char vCode))
3619 JVMWrapper("JVM_SetPrimitiveArrayElement");
3620 arrayOop a = check_array(env, arr, true, CHECK);
3621 assert(a->is_typeArray(), "just checking");
3622 BasicType value_type = (BasicType) vCode;
3623 Reflection::array_set(&v, a, index, value_type, CHECK);
3624 JVM_END
3627 JVM_ENTRY(jobject, JVM_NewArray(JNIEnv *env, jclass eltClass, jint length))
3628 JVMWrapper("JVM_NewArray");
3629 JvmtiVMObjectAllocEventCollector oam;
3630 oop element_mirror = JNIHandles::resolve(eltClass);
3631 oop result = Reflection::reflect_new_array(element_mirror, length, CHECK_NULL);
3632 return JNIHandles::make_local(env, result);
3633 JVM_END
3636 JVM_ENTRY(jobject, JVM_NewMultiArray(JNIEnv *env, jclass eltClass, jintArray dim))
3637 JVMWrapper("JVM_NewMultiArray");
3638 JvmtiVMObjectAllocEventCollector oam;
3639 arrayOop dim_array = check_array(env, dim, true, CHECK_NULL);
3640 oop element_mirror = JNIHandles::resolve(eltClass);
3641 assert(dim_array->is_typeArray(), "just checking");
3642 oop result = Reflection::reflect_new_multi_array(element_mirror, typeArrayOop(dim_array), CHECK_NULL);
3643 return JNIHandles::make_local(env, result);
3644 JVM_END
3647 // Networking library support ////////////////////////////////////////////////////////////////////
3649 JVM_LEAF(jint, JVM_InitializeSocketLibrary())
3650 JVMWrapper("JVM_InitializeSocketLibrary");
3651 return 0;
3652 JVM_END
3655 JVM_LEAF(jint, JVM_Socket(jint domain, jint type, jint protocol))
3656 JVMWrapper("JVM_Socket");
3657 return os::socket(domain, type, protocol);
3658 JVM_END
3661 JVM_LEAF(jint, JVM_SocketClose(jint fd))
3662 JVMWrapper2("JVM_SocketClose (0x%x)", fd);
3663 //%note jvm_r6
3664 return os::socket_close(fd);
3665 JVM_END
3668 JVM_LEAF(jint, JVM_SocketShutdown(jint fd, jint howto))
3669 JVMWrapper2("JVM_SocketShutdown (0x%x)", fd);
3670 //%note jvm_r6
3671 return os::socket_shutdown(fd, howto);
3672 JVM_END
3675 JVM_LEAF(jint, JVM_Recv(jint fd, char *buf, jint nBytes, jint flags))
3676 JVMWrapper2("JVM_Recv (0x%x)", fd);
3677 //%note jvm_r6
3678 return os::recv(fd, buf, (size_t)nBytes, (uint)flags);
3679 JVM_END
3682 JVM_LEAF(jint, JVM_Send(jint fd, char *buf, jint nBytes, jint flags))
3683 JVMWrapper2("JVM_Send (0x%x)", fd);
3684 //%note jvm_r6
3685 return os::send(fd, buf, (size_t)nBytes, (uint)flags);
3686 JVM_END
3689 JVM_LEAF(jint, JVM_Timeout(int fd, long timeout))
3690 JVMWrapper2("JVM_Timeout (0x%x)", fd);
3691 //%note jvm_r6
3692 return os::timeout(fd, timeout);
3693 JVM_END
3696 JVM_LEAF(jint, JVM_Listen(jint fd, jint count))
3697 JVMWrapper2("JVM_Listen (0x%x)", fd);
3698 //%note jvm_r6
3699 return os::listen(fd, count);
3700 JVM_END
3703 JVM_LEAF(jint, JVM_Connect(jint fd, struct sockaddr *him, jint len))
3704 JVMWrapper2("JVM_Connect (0x%x)", fd);
3705 //%note jvm_r6
3706 return os::connect(fd, him, (socklen_t)len);
3707 JVM_END
3710 JVM_LEAF(jint, JVM_Bind(jint fd, struct sockaddr *him, jint len))
3711 JVMWrapper2("JVM_Bind (0x%x)", fd);
3712 //%note jvm_r6
3713 return os::bind(fd, him, (socklen_t)len);
3714 JVM_END
3717 JVM_LEAF(jint, JVM_Accept(jint fd, struct sockaddr *him, jint *len))
3718 JVMWrapper2("JVM_Accept (0x%x)", fd);
3719 //%note jvm_r6
3720 socklen_t socklen = (socklen_t)(*len);
3721 jint result = os::accept(fd, him, &socklen);
3722 *len = (jint)socklen;
3723 return result;
3724 JVM_END
3727 JVM_LEAF(jint, JVM_RecvFrom(jint fd, char *buf, int nBytes, int flags, struct sockaddr *from, int *fromlen))
3728 JVMWrapper2("JVM_RecvFrom (0x%x)", fd);
3729 //%note jvm_r6
3730 socklen_t socklen = (socklen_t)(*fromlen);
3731 jint result = os::recvfrom(fd, buf, (size_t)nBytes, (uint)flags, from, &socklen);
3732 *fromlen = (int)socklen;
3733 return result;
3734 JVM_END
3737 JVM_LEAF(jint, JVM_GetSockName(jint fd, struct sockaddr *him, int *len))
3738 JVMWrapper2("JVM_GetSockName (0x%x)", fd);
3739 //%note jvm_r6
3740 socklen_t socklen = (socklen_t)(*len);
3741 jint result = os::get_sock_name(fd, him, &socklen);
3742 *len = (int)socklen;
3743 return result;
3744 JVM_END
3747 JVM_LEAF(jint, JVM_SendTo(jint fd, char *buf, int len, int flags, struct sockaddr *to, int tolen))
3748 JVMWrapper2("JVM_SendTo (0x%x)", fd);
3749 //%note jvm_r6
3750 return os::sendto(fd, buf, (size_t)len, (uint)flags, to, (socklen_t)tolen);
3751 JVM_END
3754 JVM_LEAF(jint, JVM_SocketAvailable(jint fd, jint *pbytes))
3755 JVMWrapper2("JVM_SocketAvailable (0x%x)", fd);
3756 //%note jvm_r6
3757 return os::socket_available(fd, pbytes);
3758 JVM_END
3761 JVM_LEAF(jint, JVM_GetSockOpt(jint fd, int level, int optname, char *optval, int *optlen))
3762 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3763 //%note jvm_r6
3764 socklen_t socklen = (socklen_t)(*optlen);
3765 jint result = os::get_sock_opt(fd, level, optname, optval, &socklen);
3766 *optlen = (int)socklen;
3767 return result;
3768 JVM_END
3771 JVM_LEAF(jint, JVM_SetSockOpt(jint fd, int level, int optname, const char *optval, int optlen))
3772 JVMWrapper2("JVM_GetSockOpt (0x%x)", fd);
3773 //%note jvm_r6
3774 return os::set_sock_opt(fd, level, optname, optval, (socklen_t)optlen);
3775 JVM_END
3778 JVM_LEAF(int, JVM_GetHostName(char* name, int namelen))
3779 JVMWrapper("JVM_GetHostName");
3780 return os::get_host_name(name, namelen);
3781 JVM_END
3784 // Library support ///////////////////////////////////////////////////////////////////////////
3786 JVM_ENTRY_NO_ENV(void*, JVM_LoadLibrary(const char* name))
3787 //%note jvm_ct
3788 JVMWrapper2("JVM_LoadLibrary (%s)", name);
3789 char ebuf[1024];
3790 void *load_result;
3791 {
3792 ThreadToNativeFromVM ttnfvm(thread);
3793 load_result = os::dll_load(name, ebuf, sizeof ebuf);
3794 }
3795 if (load_result == NULL) {
3796 char msg[1024];
3797 jio_snprintf(msg, sizeof msg, "%s: %s", name, ebuf);
3798 // Since 'ebuf' may contain a string encoded using
3799 // platform encoding scheme, we need to pass
3800 // Exceptions::unsafe_to_utf8 to the new_exception method
3801 // as the last argument. See bug 6367357.
3802 Handle h_exception =
3803 Exceptions::new_exception(thread,
3804 vmSymbols::java_lang_UnsatisfiedLinkError(),
3805 msg, Exceptions::unsafe_to_utf8);
3807 THROW_HANDLE_0(h_exception);
3808 }
3809 return load_result;
3810 JVM_END
3813 JVM_LEAF(void, JVM_UnloadLibrary(void* handle))
3814 JVMWrapper("JVM_UnloadLibrary");
3815 os::dll_unload(handle);
3816 JVM_END
3819 JVM_LEAF(void*, JVM_FindLibraryEntry(void* handle, const char* name))
3820 JVMWrapper2("JVM_FindLibraryEntry (%s)", name);
3821 return os::dll_lookup(handle, name);
3822 JVM_END
3825 // Floating point support ////////////////////////////////////////////////////////////////////
3827 JVM_LEAF(jboolean, JVM_IsNaN(jdouble a))
3828 JVMWrapper("JVM_IsNaN");
3829 return g_isnan(a);
3830 JVM_END
3833 // JNI version ///////////////////////////////////////////////////////////////////////////////
3835 JVM_LEAF(jboolean, JVM_IsSupportedJNIVersion(jint version))
3836 JVMWrapper2("JVM_IsSupportedJNIVersion (%d)", version);
3837 return Threads::is_supported_jni_version_including_1_1(version);
3838 JVM_END
3841 // String support ///////////////////////////////////////////////////////////////////////////
3843 JVM_ENTRY(jstring, JVM_InternString(JNIEnv *env, jstring str))
3844 JVMWrapper("JVM_InternString");
3845 JvmtiVMObjectAllocEventCollector oam;
3846 if (str == NULL) return NULL;
3847 oop string = JNIHandles::resolve_non_null(str);
3848 oop result = StringTable::intern(string, CHECK_NULL);
3849 return (jstring) JNIHandles::make_local(env, result);
3850 JVM_END
3853 // Raw monitor support //////////////////////////////////////////////////////////////////////
3855 // The lock routine below calls lock_without_safepoint_check in order to get a raw lock
3856 // without interfering with the safepoint mechanism. The routines are not JVM_LEAF because
3857 // they might be called by non-java threads. The JVM_LEAF installs a NoHandleMark check
3858 // that only works with java threads.
3861 JNIEXPORT void* JNICALL JVM_RawMonitorCreate(void) {
3862 VM_Exit::block_if_vm_exited();
3863 JVMWrapper("JVM_RawMonitorCreate");
3864 return new Mutex(Mutex::native, "JVM_RawMonitorCreate");
3865 }
3868 JNIEXPORT void JNICALL JVM_RawMonitorDestroy(void *mon) {
3869 VM_Exit::block_if_vm_exited();
3870 JVMWrapper("JVM_RawMonitorDestroy");
3871 delete ((Mutex*) mon);
3872 }
3875 JNIEXPORT jint JNICALL JVM_RawMonitorEnter(void *mon) {
3876 VM_Exit::block_if_vm_exited();
3877 JVMWrapper("JVM_RawMonitorEnter");
3878 ((Mutex*) mon)->jvm_raw_lock();
3879 return 0;
3880 }
3883 JNIEXPORT void JNICALL JVM_RawMonitorExit(void *mon) {
3884 VM_Exit::block_if_vm_exited();
3885 JVMWrapper("JVM_RawMonitorExit");
3886 ((Mutex*) mon)->jvm_raw_unlock();
3887 }
3890 // Support for Serialization
3892 typedef jfloat (JNICALL *IntBitsToFloatFn )(JNIEnv* env, jclass cb, jint value);
3893 typedef jdouble (JNICALL *LongBitsToDoubleFn)(JNIEnv* env, jclass cb, jlong value);
3894 typedef jint (JNICALL *FloatToIntBitsFn )(JNIEnv* env, jclass cb, jfloat value);
3895 typedef jlong (JNICALL *DoubleToLongBitsFn)(JNIEnv* env, jclass cb, jdouble value);
3897 static IntBitsToFloatFn int_bits_to_float_fn = NULL;
3898 static LongBitsToDoubleFn long_bits_to_double_fn = NULL;
3899 static FloatToIntBitsFn float_to_int_bits_fn = NULL;
3900 static DoubleToLongBitsFn double_to_long_bits_fn = NULL;
3903 void initialize_converter_functions() {
3904 if (JDK_Version::is_gte_jdk14x_version()) {
3905 // These functions only exist for compatibility with 1.3.1 and earlier
3906 return;
3907 }
3909 // called from universe_post_init()
3910 assert(
3911 int_bits_to_float_fn == NULL &&
3912 long_bits_to_double_fn == NULL &&
3913 float_to_int_bits_fn == NULL &&
3914 double_to_long_bits_fn == NULL ,
3915 "initialization done twice"
3916 );
3917 // initialize
3918 int_bits_to_float_fn = CAST_TO_FN_PTR(IntBitsToFloatFn , NativeLookup::base_library_lookup("java/lang/Float" , "intBitsToFloat" , "(I)F"));
3919 long_bits_to_double_fn = CAST_TO_FN_PTR(LongBitsToDoubleFn, NativeLookup::base_library_lookup("java/lang/Double", "longBitsToDouble", "(J)D"));
3920 float_to_int_bits_fn = CAST_TO_FN_PTR(FloatToIntBitsFn , NativeLookup::base_library_lookup("java/lang/Float" , "floatToIntBits" , "(F)I"));
3921 double_to_long_bits_fn = CAST_TO_FN_PTR(DoubleToLongBitsFn, NativeLookup::base_library_lookup("java/lang/Double", "doubleToLongBits", "(D)J"));
3922 // verify
3923 assert(
3924 int_bits_to_float_fn != NULL &&
3925 long_bits_to_double_fn != NULL &&
3926 float_to_int_bits_fn != NULL &&
3927 double_to_long_bits_fn != NULL ,
3928 "initialization failed"
3929 );
3930 }
3933 // Serialization
3934 JVM_ENTRY(void, JVM_SetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
3935 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
3936 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
3938 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
3939 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
3940 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
3941 oop o = JNIHandles::resolve(obj);
3943 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
3944 THROW(vmSymbols::java_lang_NullPointerException());
3945 }
3947 jsize nfids = fids->length();
3948 if (nfids == 0) return;
3950 if (tcodes->length() < nfids) {
3951 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
3952 }
3954 jsize off = 0;
3955 /* loop through fields, setting values */
3956 for (jsize i = 0; i < nfids; i++) {
3957 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
3958 int field_offset;
3959 if (fid != NULL) {
3960 // NULL is a legal value for fid, but retrieving the field offset
3961 // trigger assertion in that case
3962 field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
3963 }
3965 switch (tcodes->char_at(i)) {
3966 case 'Z':
3967 if (fid != NULL) {
3968 jboolean val = (dbuf->byte_at(off) != 0) ? JNI_TRUE : JNI_FALSE;
3969 o->bool_field_put(field_offset, val);
3970 }
3971 off++;
3972 break;
3974 case 'B':
3975 if (fid != NULL) {
3976 o->byte_field_put(field_offset, dbuf->byte_at(off));
3977 }
3978 off++;
3979 break;
3981 case 'C':
3982 if (fid != NULL) {
3983 jchar val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3984 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3985 o->char_field_put(field_offset, val);
3986 }
3987 off += 2;
3988 break;
3990 case 'S':
3991 if (fid != NULL) {
3992 jshort val = ((dbuf->byte_at(off + 0) & 0xFF) << 8)
3993 + ((dbuf->byte_at(off + 1) & 0xFF) << 0);
3994 o->short_field_put(field_offset, val);
3995 }
3996 off += 2;
3997 break;
3999 case 'I':
4000 if (fid != NULL) {
4001 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4002 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4003 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4004 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4005 o->int_field_put(field_offset, ival);
4006 }
4007 off += 4;
4008 break;
4010 case 'F':
4011 if (fid != NULL) {
4012 jint ival = ((dbuf->byte_at(off + 0) & 0xFF) << 24)
4013 + ((dbuf->byte_at(off + 1) & 0xFF) << 16)
4014 + ((dbuf->byte_at(off + 2) & 0xFF) << 8)
4015 + ((dbuf->byte_at(off + 3) & 0xFF) << 0);
4016 jfloat fval = (*int_bits_to_float_fn)(env, NULL, ival);
4017 o->float_field_put(field_offset, fval);
4018 }
4019 off += 4;
4020 break;
4022 case 'J':
4023 if (fid != NULL) {
4024 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4025 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4026 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4027 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4028 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4029 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4030 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4031 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4032 o->long_field_put(field_offset, lval);
4033 }
4034 off += 8;
4035 break;
4037 case 'D':
4038 if (fid != NULL) {
4039 jlong lval = (((jlong) dbuf->byte_at(off + 0) & 0xFF) << 56)
4040 + (((jlong) dbuf->byte_at(off + 1) & 0xFF) << 48)
4041 + (((jlong) dbuf->byte_at(off + 2) & 0xFF) << 40)
4042 + (((jlong) dbuf->byte_at(off + 3) & 0xFF) << 32)
4043 + (((jlong) dbuf->byte_at(off + 4) & 0xFF) << 24)
4044 + (((jlong) dbuf->byte_at(off + 5) & 0xFF) << 16)
4045 + (((jlong) dbuf->byte_at(off + 6) & 0xFF) << 8)
4046 + (((jlong) dbuf->byte_at(off + 7) & 0xFF) << 0);
4047 jdouble dval = (*long_bits_to_double_fn)(env, NULL, lval);
4048 o->double_field_put(field_offset, dval);
4049 }
4050 off += 8;
4051 break;
4053 default:
4054 // Illegal typecode
4055 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4056 }
4057 }
4058 JVM_END
4061 JVM_ENTRY(void, JVM_GetPrimitiveFieldValues(JNIEnv *env, jclass cb, jobject obj,
4062 jlongArray fieldIDs, jcharArray typecodes, jbyteArray data))
4063 assert(!JDK_Version::is_gte_jdk14x_version(), "should only be used in 1.3.1 and earlier");
4065 typeArrayOop tcodes = typeArrayOop(JNIHandles::resolve(typecodes));
4066 typeArrayOop dbuf = typeArrayOop(JNIHandles::resolve(data));
4067 typeArrayOop fids = typeArrayOop(JNIHandles::resolve(fieldIDs));
4068 oop o = JNIHandles::resolve(obj);
4070 if (o == NULL || fids == NULL || dbuf == NULL || tcodes == NULL) {
4071 THROW(vmSymbols::java_lang_NullPointerException());
4072 }
4074 jsize nfids = fids->length();
4075 if (nfids == 0) return;
4077 if (tcodes->length() < nfids) {
4078 THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
4079 }
4081 /* loop through fields, fetching values */
4082 jsize off = 0;
4083 for (jsize i = 0; i < nfids; i++) {
4084 jfieldID fid = (jfieldID)(intptr_t) fids->long_at(i);
4085 if (fid == NULL) {
4086 THROW(vmSymbols::java_lang_NullPointerException());
4087 }
4088 int field_offset = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4090 switch (tcodes->char_at(i)) {
4091 case 'Z':
4092 {
4093 jboolean val = o->bool_field(field_offset);
4094 dbuf->byte_at_put(off++, (val != 0) ? 1 : 0);
4095 }
4096 break;
4098 case 'B':
4099 dbuf->byte_at_put(off++, o->byte_field(field_offset));
4100 break;
4102 case 'C':
4103 {
4104 jchar val = o->char_field(field_offset);
4105 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4106 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4107 }
4108 break;
4110 case 'S':
4111 {
4112 jshort val = o->short_field(field_offset);
4113 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4114 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4115 }
4116 break;
4118 case 'I':
4119 {
4120 jint val = o->int_field(field_offset);
4121 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4122 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4123 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4124 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4125 }
4126 break;
4128 case 'F':
4129 {
4130 jfloat fval = o->float_field(field_offset);
4131 jint ival = (*float_to_int_bits_fn)(env, NULL, fval);
4132 dbuf->byte_at_put(off++, (ival >> 24) & 0xFF);
4133 dbuf->byte_at_put(off++, (ival >> 16) & 0xFF);
4134 dbuf->byte_at_put(off++, (ival >> 8) & 0xFF);
4135 dbuf->byte_at_put(off++, (ival >> 0) & 0xFF);
4136 }
4137 break;
4139 case 'J':
4140 {
4141 jlong val = o->long_field(field_offset);
4142 dbuf->byte_at_put(off++, (val >> 56) & 0xFF);
4143 dbuf->byte_at_put(off++, (val >> 48) & 0xFF);
4144 dbuf->byte_at_put(off++, (val >> 40) & 0xFF);
4145 dbuf->byte_at_put(off++, (val >> 32) & 0xFF);
4146 dbuf->byte_at_put(off++, (val >> 24) & 0xFF);
4147 dbuf->byte_at_put(off++, (val >> 16) & 0xFF);
4148 dbuf->byte_at_put(off++, (val >> 8) & 0xFF);
4149 dbuf->byte_at_put(off++, (val >> 0) & 0xFF);
4150 }
4151 break;
4153 case 'D':
4154 {
4155 jdouble dval = o->double_field(field_offset);
4156 jlong lval = (*double_to_long_bits_fn)(env, NULL, dval);
4157 dbuf->byte_at_put(off++, (lval >> 56) & 0xFF);
4158 dbuf->byte_at_put(off++, (lval >> 48) & 0xFF);
4159 dbuf->byte_at_put(off++, (lval >> 40) & 0xFF);
4160 dbuf->byte_at_put(off++, (lval >> 32) & 0xFF);
4161 dbuf->byte_at_put(off++, (lval >> 24) & 0xFF);
4162 dbuf->byte_at_put(off++, (lval >> 16) & 0xFF);
4163 dbuf->byte_at_put(off++, (lval >> 8) & 0xFF);
4164 dbuf->byte_at_put(off++, (lval >> 0) & 0xFF);
4165 }
4166 break;
4168 default:
4169 // Illegal typecode
4170 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), "illegal typecode");
4171 }
4172 }
4173 JVM_END
4176 // Shared JNI/JVM entry points //////////////////////////////////////////////////////////////
4178 jclass find_class_from_class_loader(JNIEnv* env, Symbol* name, jboolean init, Handle loader, Handle protection_domain, jboolean throwError, TRAPS) {
4179 // Security Note:
4180 // The Java level wrapper will perform the necessary security check allowing
4181 // us to pass the NULL as the initiating class loader.
4182 Klass* klass = SystemDictionary::resolve_or_fail(name, loader, protection_domain, throwError != 0, CHECK_NULL);
4184 KlassHandle klass_handle(THREAD, klass);
4185 // Check if we should initialize the class
4186 if (init && klass_handle->oop_is_instance()) {
4187 klass_handle->initialize(CHECK_NULL);
4188 }
4189 return (jclass) JNIHandles::make_local(env, klass_handle->java_mirror());
4190 }
4193 // Internal SQE debugging support ///////////////////////////////////////////////////////////
4195 #ifndef PRODUCT
4197 extern "C" {
4198 JNIEXPORT jboolean JNICALL JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get);
4199 JNIEXPORT jboolean JNICALL JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get);
4200 JNIEXPORT void JNICALL JVM_VMBreakPoint(JNIEnv *env, jobject obj);
4201 }
4203 JVM_LEAF(jboolean, JVM_AccessVMBooleanFlag(const char* name, jboolean* value, jboolean is_get))
4204 JVMWrapper("JVM_AccessBoolVMFlag");
4205 return is_get ? CommandLineFlags::boolAt((char*) name, (bool*) value) : CommandLineFlags::boolAtPut((char*) name, (bool*) value, INTERNAL);
4206 JVM_END
4208 JVM_LEAF(jboolean, JVM_AccessVMIntFlag(const char* name, jint* value, jboolean is_get))
4209 JVMWrapper("JVM_AccessVMIntFlag");
4210 intx v;
4211 jboolean result = is_get ? CommandLineFlags::intxAt((char*) name, &v) : CommandLineFlags::intxAtPut((char*) name, &v, INTERNAL);
4212 *value = (jint)v;
4213 return result;
4214 JVM_END
4217 JVM_ENTRY(void, JVM_VMBreakPoint(JNIEnv *env, jobject obj))
4218 JVMWrapper("JVM_VMBreakPoint");
4219 oop the_obj = JNIHandles::resolve(obj);
4220 BREAKPOINT;
4221 JVM_END
4224 #endif
4227 // Method ///////////////////////////////////////////////////////////////////////////////////////////
4229 JVM_ENTRY(jobject, JVM_InvokeMethod(JNIEnv *env, jobject method, jobject obj, jobjectArray args0))
4230 JVMWrapper("JVM_InvokeMethod");
4231 Handle method_handle;
4232 if (thread->stack_available((address) &method_handle) >= JVMInvokeMethodSlack) {
4233 method_handle = Handle(THREAD, JNIHandles::resolve(method));
4234 Handle receiver(THREAD, JNIHandles::resolve(obj));
4235 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4236 oop result = Reflection::invoke_method(method_handle(), receiver, args, CHECK_NULL);
4237 jobject res = JNIHandles::make_local(env, result);
4238 if (JvmtiExport::should_post_vm_object_alloc()) {
4239 oop ret_type = java_lang_reflect_Method::return_type(method_handle());
4240 assert(ret_type != NULL, "sanity check: ret_type oop must not be NULL!");
4241 if (java_lang_Class::is_primitive(ret_type)) {
4242 // Only for primitive type vm allocates memory for java object.
4243 // See box() method.
4244 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4245 }
4246 }
4247 return res;
4248 } else {
4249 THROW_0(vmSymbols::java_lang_StackOverflowError());
4250 }
4251 JVM_END
4254 JVM_ENTRY(jobject, JVM_NewInstanceFromConstructor(JNIEnv *env, jobject c, jobjectArray args0))
4255 JVMWrapper("JVM_NewInstanceFromConstructor");
4256 oop constructor_mirror = JNIHandles::resolve(c);
4257 objArrayHandle args(THREAD, objArrayOop(JNIHandles::resolve(args0)));
4258 oop result = Reflection::invoke_constructor(constructor_mirror, args, CHECK_NULL);
4259 jobject res = JNIHandles::make_local(env, result);
4260 if (JvmtiExport::should_post_vm_object_alloc()) {
4261 JvmtiExport::post_vm_object_alloc(JavaThread::current(), result);
4262 }
4263 return res;
4264 JVM_END
4266 // Atomic ///////////////////////////////////////////////////////////////////////////////////////////
4268 JVM_LEAF(jboolean, JVM_SupportsCX8())
4269 JVMWrapper("JVM_SupportsCX8");
4270 return VM_Version::supports_cx8();
4271 JVM_END
4274 JVM_ENTRY(jboolean, JVM_CX8Field(JNIEnv *env, jobject obj, jfieldID fid, jlong oldVal, jlong newVal))
4275 JVMWrapper("JVM_CX8Field");
4276 jlong res;
4277 oop o = JNIHandles::resolve(obj);
4278 intptr_t fldOffs = jfieldIDWorkaround::from_instance_jfieldID(o->klass(), fid);
4279 volatile jlong* addr = (volatile jlong*)((address)o + fldOffs);
4281 assert(VM_Version::supports_cx8(), "cx8 not supported");
4282 res = Atomic::cmpxchg(newVal, addr, oldVal);
4284 return res == oldVal;
4285 JVM_END
4287 // DTrace ///////////////////////////////////////////////////////////////////
4289 JVM_ENTRY(jint, JVM_DTraceGetVersion(JNIEnv* env))
4290 JVMWrapper("JVM_DTraceGetVersion");
4291 return (jint)JVM_TRACING_DTRACE_VERSION;
4292 JVM_END
4294 JVM_ENTRY(jlong,JVM_DTraceActivate(
4295 JNIEnv* env, jint version, jstring module_name, jint providers_count,
4296 JVM_DTraceProvider* providers))
4297 JVMWrapper("JVM_DTraceActivate");
4298 return DTraceJSDT::activate(
4299 version, module_name, providers_count, providers, CHECK_0);
4300 JVM_END
4302 JVM_ENTRY(jboolean,JVM_DTraceIsProbeEnabled(JNIEnv* env, jmethodID method))
4303 JVMWrapper("JVM_DTraceIsProbeEnabled");
4304 return DTraceJSDT::is_probe_enabled(method);
4305 JVM_END
4307 JVM_ENTRY(void,JVM_DTraceDispose(JNIEnv* env, jlong handle))
4308 JVMWrapper("JVM_DTraceDispose");
4309 DTraceJSDT::dispose(handle);
4310 JVM_END
4312 JVM_ENTRY(jboolean,JVM_DTraceIsSupported(JNIEnv* env))
4313 JVMWrapper("JVM_DTraceIsSupported");
4314 return DTraceJSDT::is_supported();
4315 JVM_END
4317 // Returns an array of all live Thread objects (VM internal JavaThreads,
4318 // jvmti agent threads, and JNI attaching threads are skipped)
4319 // See CR 6404306 regarding JNI attaching threads
4320 JVM_ENTRY(jobjectArray, JVM_GetAllThreads(JNIEnv *env, jclass dummy))
4321 ResourceMark rm(THREAD);
4322 ThreadsListEnumerator tle(THREAD, false, false);
4323 JvmtiVMObjectAllocEventCollector oam;
4325 int num_threads = tle.num_threads();
4326 objArrayOop r = oopFactory::new_objArray(SystemDictionary::Thread_klass(), num_threads, CHECK_NULL);
4327 objArrayHandle threads_ah(THREAD, r);
4329 for (int i = 0; i < num_threads; i++) {
4330 Handle h = tle.get_threadObj(i);
4331 threads_ah->obj_at_put(i, h());
4332 }
4334 return (jobjectArray) JNIHandles::make_local(env, threads_ah());
4335 JVM_END
4338 // Support for java.lang.Thread.getStackTrace() and getAllStackTraces() methods
4339 // Return StackTraceElement[][], each element is the stack trace of a thread in
4340 // the corresponding entry in the given threads array
4341 JVM_ENTRY(jobjectArray, JVM_DumpThreads(JNIEnv *env, jclass threadClass, jobjectArray threads))
4342 JVMWrapper("JVM_DumpThreads");
4343 JvmtiVMObjectAllocEventCollector oam;
4345 // Check if threads is null
4346 if (threads == NULL) {
4347 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4348 }
4350 objArrayOop a = objArrayOop(JNIHandles::resolve_non_null(threads));
4351 objArrayHandle ah(THREAD, a);
4352 int num_threads = ah->length();
4353 // check if threads is non-empty array
4354 if (num_threads == 0) {
4355 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4356 }
4358 // check if threads is not an array of objects of Thread class
4359 Klass* k = ObjArrayKlass::cast(ah->klass())->element_klass();
4360 if (k != SystemDictionary::Thread_klass()) {
4361 THROW_(vmSymbols::java_lang_IllegalArgumentException(), 0);
4362 }
4364 ResourceMark rm(THREAD);
4366 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads);
4367 for (int i = 0; i < num_threads; i++) {
4368 oop thread_obj = ah->obj_at(i);
4369 instanceHandle h(THREAD, (instanceOop) thread_obj);
4370 thread_handle_array->append(h);
4371 }
4373 Handle stacktraces = ThreadService::dump_stack_traces(thread_handle_array, num_threads, CHECK_NULL);
4374 return (jobjectArray)JNIHandles::make_local(env, stacktraces());
4376 JVM_END
4378 // JVM monitoring and management support
4379 JVM_ENTRY_NO_ENV(void*, JVM_GetManagement(jint version))
4380 return Management::get_jmm_interface(version);
4381 JVM_END
4383 // com.sun.tools.attach.VirtualMachine agent properties support
4384 //
4385 // Initialize the agent properties with the properties maintained in the VM
4386 JVM_ENTRY(jobject, JVM_InitAgentProperties(JNIEnv *env, jobject properties))
4387 JVMWrapper("JVM_InitAgentProperties");
4388 ResourceMark rm;
4390 Handle props(THREAD, JNIHandles::resolve_non_null(properties));
4392 PUTPROP(props, "sun.java.command", Arguments::java_command());
4393 PUTPROP(props, "sun.jvm.flags", Arguments::jvm_flags());
4394 PUTPROP(props, "sun.jvm.args", Arguments::jvm_args());
4395 return properties;
4396 JVM_END
4398 JVM_ENTRY(jobjectArray, JVM_GetEnclosingMethodInfo(JNIEnv *env, jclass ofClass))
4399 {
4400 JVMWrapper("JVM_GetEnclosingMethodInfo");
4401 JvmtiVMObjectAllocEventCollector oam;
4403 if (ofClass == NULL) {
4404 return NULL;
4405 }
4406 Handle mirror(THREAD, JNIHandles::resolve_non_null(ofClass));
4407 // Special handling for primitive objects
4408 if (java_lang_Class::is_primitive(mirror())) {
4409 return NULL;
4410 }
4411 Klass* k = java_lang_Class::as_Klass(mirror());
4412 if (!k->oop_is_instance()) {
4413 return NULL;
4414 }
4415 instanceKlassHandle ik_h(THREAD, k);
4416 int encl_method_class_idx = ik_h->enclosing_method_class_index();
4417 if (encl_method_class_idx == 0) {
4418 return NULL;
4419 }
4420 objArrayOop dest_o = oopFactory::new_objArray(SystemDictionary::Object_klass(), 3, CHECK_NULL);
4421 objArrayHandle dest(THREAD, dest_o);
4422 Klass* enc_k = ik_h->constants()->klass_at(encl_method_class_idx, CHECK_NULL);
4423 dest->obj_at_put(0, enc_k->java_mirror());
4424 int encl_method_method_idx = ik_h->enclosing_method_method_index();
4425 if (encl_method_method_idx != 0) {
4426 Symbol* sym = ik_h->constants()->symbol_at(
4427 extract_low_short_from_int(
4428 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4429 Handle str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4430 dest->obj_at_put(1, str());
4431 sym = ik_h->constants()->symbol_at(
4432 extract_high_short_from_int(
4433 ik_h->constants()->name_and_type_at(encl_method_method_idx)));
4434 str = java_lang_String::create_from_symbol(sym, CHECK_NULL);
4435 dest->obj_at_put(2, str());
4436 }
4437 return (jobjectArray) JNIHandles::make_local(dest());
4438 }
4439 JVM_END
4441 JVM_ENTRY(jintArray, JVM_GetThreadStateValues(JNIEnv* env,
4442 jint javaThreadState))
4443 {
4444 // If new thread states are added in future JDK and VM versions,
4445 // this should check if the JDK version is compatible with thread
4446 // states supported by the VM. Return NULL if not compatible.
4447 //
4448 // This function must map the VM java_lang_Thread::ThreadStatus
4449 // to the Java thread state that the JDK supports.
4450 //
4452 typeArrayHandle values_h;
4453 switch (javaThreadState) {
4454 case JAVA_THREAD_STATE_NEW : {
4455 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4456 values_h = typeArrayHandle(THREAD, r);
4457 values_h->int_at_put(0, java_lang_Thread::NEW);
4458 break;
4459 }
4460 case JAVA_THREAD_STATE_RUNNABLE : {
4461 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4462 values_h = typeArrayHandle(THREAD, r);
4463 values_h->int_at_put(0, java_lang_Thread::RUNNABLE);
4464 break;
4465 }
4466 case JAVA_THREAD_STATE_BLOCKED : {
4467 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4468 values_h = typeArrayHandle(THREAD, r);
4469 values_h->int_at_put(0, java_lang_Thread::BLOCKED_ON_MONITOR_ENTER);
4470 break;
4471 }
4472 case JAVA_THREAD_STATE_WAITING : {
4473 typeArrayOop r = oopFactory::new_typeArray(T_INT, 2, CHECK_NULL);
4474 values_h = typeArrayHandle(THREAD, r);
4475 values_h->int_at_put(0, java_lang_Thread::IN_OBJECT_WAIT);
4476 values_h->int_at_put(1, java_lang_Thread::PARKED);
4477 break;
4478 }
4479 case JAVA_THREAD_STATE_TIMED_WAITING : {
4480 typeArrayOop r = oopFactory::new_typeArray(T_INT, 3, CHECK_NULL);
4481 values_h = typeArrayHandle(THREAD, r);
4482 values_h->int_at_put(0, java_lang_Thread::SLEEPING);
4483 values_h->int_at_put(1, java_lang_Thread::IN_OBJECT_WAIT_TIMED);
4484 values_h->int_at_put(2, java_lang_Thread::PARKED_TIMED);
4485 break;
4486 }
4487 case JAVA_THREAD_STATE_TERMINATED : {
4488 typeArrayOop r = oopFactory::new_typeArray(T_INT, 1, CHECK_NULL);
4489 values_h = typeArrayHandle(THREAD, r);
4490 values_h->int_at_put(0, java_lang_Thread::TERMINATED);
4491 break;
4492 }
4493 default:
4494 // Unknown state - probably incompatible JDK version
4495 return NULL;
4496 }
4498 return (jintArray) JNIHandles::make_local(env, values_h());
4499 }
4500 JVM_END
4503 JVM_ENTRY(jobjectArray, JVM_GetThreadStateNames(JNIEnv* env,
4504 jint javaThreadState,
4505 jintArray values))
4506 {
4507 // If new thread states are added in future JDK and VM versions,
4508 // this should check if the JDK version is compatible with thread
4509 // states supported by the VM. Return NULL if not compatible.
4510 //
4511 // This function must map the VM java_lang_Thread::ThreadStatus
4512 // to the Java thread state that the JDK supports.
4513 //
4515 ResourceMark rm;
4517 // Check if threads is null
4518 if (values == NULL) {
4519 THROW_(vmSymbols::java_lang_NullPointerException(), 0);
4520 }
4522 typeArrayOop v = typeArrayOop(JNIHandles::resolve_non_null(values));
4523 typeArrayHandle values_h(THREAD, v);
4525 objArrayHandle names_h;
4526 switch (javaThreadState) {
4527 case JAVA_THREAD_STATE_NEW : {
4528 assert(values_h->length() == 1 &&
4529 values_h->int_at(0) == java_lang_Thread::NEW,
4530 "Invalid threadStatus value");
4532 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4533 1, /* only 1 substate */
4534 CHECK_NULL);
4535 names_h = objArrayHandle(THREAD, r);
4536 Handle name = java_lang_String::create_from_str("NEW", CHECK_NULL);
4537 names_h->obj_at_put(0, name());
4538 break;
4539 }
4540 case JAVA_THREAD_STATE_RUNNABLE : {
4541 assert(values_h->length() == 1 &&
4542 values_h->int_at(0) == java_lang_Thread::RUNNABLE,
4543 "Invalid threadStatus value");
4545 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4546 1, /* only 1 substate */
4547 CHECK_NULL);
4548 names_h = objArrayHandle(THREAD, r);
4549 Handle name = java_lang_String::create_from_str("RUNNABLE", CHECK_NULL);
4550 names_h->obj_at_put(0, name());
4551 break;
4552 }
4553 case JAVA_THREAD_STATE_BLOCKED : {
4554 assert(values_h->length() == 1 &&
4555 values_h->int_at(0) == java_lang_Thread::BLOCKED_ON_MONITOR_ENTER,
4556 "Invalid threadStatus value");
4558 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4559 1, /* only 1 substate */
4560 CHECK_NULL);
4561 names_h = objArrayHandle(THREAD, r);
4562 Handle name = java_lang_String::create_from_str("BLOCKED", CHECK_NULL);
4563 names_h->obj_at_put(0, name());
4564 break;
4565 }
4566 case JAVA_THREAD_STATE_WAITING : {
4567 assert(values_h->length() == 2 &&
4568 values_h->int_at(0) == java_lang_Thread::IN_OBJECT_WAIT &&
4569 values_h->int_at(1) == java_lang_Thread::PARKED,
4570 "Invalid threadStatus value");
4571 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4572 2, /* number of substates */
4573 CHECK_NULL);
4574 names_h = objArrayHandle(THREAD, r);
4575 Handle name0 = java_lang_String::create_from_str("WAITING.OBJECT_WAIT",
4576 CHECK_NULL);
4577 Handle name1 = java_lang_String::create_from_str("WAITING.PARKED",
4578 CHECK_NULL);
4579 names_h->obj_at_put(0, name0());
4580 names_h->obj_at_put(1, name1());
4581 break;
4582 }
4583 case JAVA_THREAD_STATE_TIMED_WAITING : {
4584 assert(values_h->length() == 3 &&
4585 values_h->int_at(0) == java_lang_Thread::SLEEPING &&
4586 values_h->int_at(1) == java_lang_Thread::IN_OBJECT_WAIT_TIMED &&
4587 values_h->int_at(2) == java_lang_Thread::PARKED_TIMED,
4588 "Invalid threadStatus value");
4589 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4590 3, /* number of substates */
4591 CHECK_NULL);
4592 names_h = objArrayHandle(THREAD, r);
4593 Handle name0 = java_lang_String::create_from_str("TIMED_WAITING.SLEEPING",
4594 CHECK_NULL);
4595 Handle name1 = java_lang_String::create_from_str("TIMED_WAITING.OBJECT_WAIT",
4596 CHECK_NULL);
4597 Handle name2 = java_lang_String::create_from_str("TIMED_WAITING.PARKED",
4598 CHECK_NULL);
4599 names_h->obj_at_put(0, name0());
4600 names_h->obj_at_put(1, name1());
4601 names_h->obj_at_put(2, name2());
4602 break;
4603 }
4604 case JAVA_THREAD_STATE_TERMINATED : {
4605 assert(values_h->length() == 1 &&
4606 values_h->int_at(0) == java_lang_Thread::TERMINATED,
4607 "Invalid threadStatus value");
4608 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
4609 1, /* only 1 substate */
4610 CHECK_NULL);
4611 names_h = objArrayHandle(THREAD, r);
4612 Handle name = java_lang_String::create_from_str("TERMINATED", CHECK_NULL);
4613 names_h->obj_at_put(0, name());
4614 break;
4615 }
4616 default:
4617 // Unknown state - probably incompatible JDK version
4618 return NULL;
4619 }
4620 return (jobjectArray) JNIHandles::make_local(env, names_h());
4621 }
4622 JVM_END
4624 JVM_ENTRY(void, JVM_GetVersionInfo(JNIEnv* env, jvm_version_info* info, size_t info_size))
4625 {
4626 memset(info, 0, sizeof(info_size));
4628 info->jvm_version = Abstract_VM_Version::jvm_version();
4629 info->update_version = 0; /* 0 in HotSpot Express VM */
4630 info->special_update_version = 0; /* 0 in HotSpot Express VM */
4632 // when we add a new capability in the jvm_version_info struct, we should also
4633 // consider to expose this new capability in the sun.rt.jvmCapabilities jvmstat
4634 // counter defined in runtimeService.cpp.
4635 info->is_attachable = AttachListener::is_attach_supported();
4636 }
4637 JVM_END